TWI851524B - Precasting structure and construction method thereof - Google Patents

Abstract

The present disclosure relates to a precasting structure and a construction method thereof. The precasting structure includes a first precasting beam and a second precasting beam. The first precasting beam includes a first section, a second section and a first rebar. The second section is separate from the first section and a gap is formed therebetween. The first rebar penetrates through and connects the first section and the second section along a length direction. The second precasting beam aligns with the first precasting beam and being adjacent to the second section of the first precasting beam. The second precasting beam is coupled to the first rebar of the first precasting beam.

Description

Precast structure and its construction method

This disclosure relates to a building structure and a construction method thereof, and in particular to a precast structure and a construction method thereof.

The traditional on-site poured reinforced concrete (RC) building construction method requires waiting for the strength of each layer of concrete in the building to reach the predetermined strength before construction can be carried out layer by layer, which is time-consuming. In addition, since a large number of workers are required to tie, assemble molds and pour grout at the construction site, it is difficult to control the construction quality, which is easily affected by the quality of workers and weather. In contrast, the steel frame reinforced concrete (SRC) building construction method can greatly reduce the construction time. However, if all structural beams and columns are made of steel frame reinforced concrete structure, a large amount of steel will be consumed, increasing the construction cost. To solve the above problems, the precast method came into being.

Precasting refers to a method of pouring concrete into reusable molds in a factory, solidifying and hardening it in a controlled environment, and transporting it to the construction site for installation. Factory production has the advantages of a stable environment, not being affected by weather, requiring less skilled workers, and standardized operations. On-site, mechanized equipment is used for assembly and hoisting, and external scaffolding is not required. The exterior wall and decoration are carried out simultaneously, effectively shortening the construction period. Since traditional formwork is not used on the construction site, it helps preserve forest resources and is environmentally friendly, and can keep the construction site neat and clean. Precasting is often used for more important building structures that bear loads, such as precast columns or precast beams.

In addition, the commonly known method of building structure construction is usually to construct the building on the construction site according to the planned floor area and the planned number of floors or height of the building, and to construct a single-story structure with a planned floor area layer by layer from the low floor to the high floor. The disadvantage of this conventional construction method is that since the entire floor structure of a predetermined area must be completed at one time (including the completion of all beams, columns and floor slabs, etc.), the work flow arrangement on the construction site (including hoisting structures, transporting materials and personnel entry and exit, etc.) must be more complicated. Moreover, as the building structure begins to be constructed layer by layer, the height gradually increases, which is more detrimental to the smooth flow arrangement of on-site workers, cranes, transport vehicles, material transportation, etc. Therefore, due to this conventional building construction method, it is impossible to effectively shorten the construction period of a building.

Especially in the construction of high-tech factories, due to the huge investment amount and the fast replacement cycle of high-tech products, when building a new factory, it is required to complete the factory quickly so that the construction of the internal clean room or clean room can be completed as soon as possible, so that the machinery and equipment can be quickly installed to start the production of high-tech products such as chips as soon as possible. Taking precast buildings as an example, at the construction site, the construction workers use tower cranes or cranes to place precast columns and precast beams in their predetermined locations. However, since both tower cranes and cranes have their load-bearing limitations or transportation distance limitations, the cost and difficulty of hoisting heavier precast columns and precast beams are greatly increased. Therefore, the above-mentioned conventional building construction method obviously cannot meet the requirements of rapid construction and shortened construction period.

In view of the shortcomings of the above-mentioned known technologies, how to change the known building construction methods in order to effectively shorten the construction period to complete the construction of high-tech factories has long been expected by the industry.

Therefore, in order to achieve the above-mentioned purpose, one aspect of the present disclosure is related to a precast structure construction method, including: providing a first precast column, a second precast column and a third precast column arranged in sequence; providing a first precast beam, the first precast beam including a first section, a second section arranged at intervals from the first section, and a first steel bar penetrating the first section and the second section; hoisting the first precast beam so that the first precast beam is arranged across the first precast column and the second precast column, wherein the two ends of the first section are respectively arranged at a position adjacent to the first precast column and the second precast column. A first end and a second end are provided, and the second section is provided on a third end of the second precast column opposite to the second end; a second precast beam is provided, and the second precast beam includes a first end and a second end opposite to the first end; the second precast beam is hoisted so that the first end of the second precast beam is provided on a temporary support frame, and the second end of the second precast beam is provided on a fourth end of the third precast column; and the second precast beam is moved so that the first end of the second precast beam is coupled with a connecting end of the first steel bar in the first precast beam extending out of the second section in the first precast beam.

Another aspect of the present disclosure is related to a precast structure, which includes a first precast beam and a second precast beam. The first precast beam includes a first section, a second section and a first steel bar. The second section is separated from the first section to form a gap between the first section and the second section. The first steel bar connects and penetrates the first section and the second section along the length direction of the precast structure. The second precast beam is roughly aligned with the first precast beam along its length direction and is adjacent to the second section of the first precast beam. The second precast beam is coupled with the first steel bar of the first precast beam.

100: The first pre-cast beam

110: Section 1

111: First end

112: Second end

114: Stirrup bend hook

120: Second section

130: First steel bar

132:Connection terminal

134: Free end

200: Second pre-cast beam

210:Entity

211: First end

212: Second end

214:Through slot

216: Stirrup bend hook

230: Second steel bar

231: First end

232: Second end

240: First connector

300: The third pre-cast beam

310: One end

400: Cable

600: First pre-cast column

610: The first entity

615: Top

620: The first set of steel bars

630: First end

700: Second pre-cast column

710: Second body

715: Top

720: The second set of steel bars

730: Second end

740: The third end

750: The sixth end

760: Corner bracket

770: The seventh end

790: Corner bracket

795: Top

800: The third pre-cast column

810: The third entity

815: Top

820: Second connector

830: The third set of steel bars

840: The fourth end

850: The fifth end

860: First main reinforcement

870: Second main reinforcement

880: Rear column reinforcement

900: Temporary support frame

910: Top surface

920: Temporary support frame

G: Gap

X: Axial direction

Y: Axis

Z: Axial direction

a,a',b,b': pre-cast beams

The following descriptions of the attached figures are for illustrative purposes only and are not intended to limit the scope of this disclosure in any way.

Figure 1 is a schematic diagram of the construction process implemented according to the present disclosure.

Figure 2 is a schematic diagram of the construction process according to the above embodiment of the present disclosure.

Figure 3 is a schematic diagram of the construction process according to the above-mentioned embodiment of the present disclosure.

Figure 4 is a schematic diagram of the construction process according to the above-mentioned embodiment of the present disclosure.

Figure 5 is a schematic diagram of the construction process according to the above-mentioned embodiment of the present disclosure.

Figure 6 is a schematic diagram of the construction process according to the above-mentioned embodiment of the present disclosure.

Figure 7 is a schematic diagram of the construction process according to the above-mentioned embodiment of the present disclosure.

Figure 8 is a right side view of line segment 8-8 in Figure 7.

Figure 9A is a schematic diagram of the known step-by-step lifting and retraction steps.

FIG. 9B is a schematic diagram of the vertical retraction step according to the above-mentioned embodiment of the present disclosure.

The following will describe the implementation of the present disclosure in detail with reference to the drawings, which includes multiple implementation examples. It should be noted that the content of the implementation of this case is only used to illustrate a specific aspect of the present disclosure, and does not limit the scope of the present disclosure. The size and relative proportion of each component in the figure are only for illustration. Unless the size and proportion relationship of the component are clearly defined, it is not used to limit the scope of the present case.

FIG. 1 is a schematic diagram of the construction process according to an embodiment of the present disclosure. First, a first pre-cast column 600, a second pre-cast column 700 and a third pre-cast column 800 are provided, which are arranged in sequence and spaced along the X-axis.

The first precast column 600 includes a first body 610 and a first set of steel bars 620. The first body 610 is composed of concrete-wrapped stirrups and the like. The first set of steel bars 620 is a vertically arranged column steel bar group, which is arranged in the first body 610 according to the designed interval and extends upward (in the Y-axis direction) from a top surface 615 of the first body 610. In this embodiment, the first set of steel bars 620 is only exemplified by two steel bars. In some embodiments disclosed in the present invention, the number of the first set of steel bars 620 is multiple, for example, twelve or more. In addition, the first precast column 600 has a first end 630, which faces the second precast column 700.

The second precast column 700 includes a second body 710 and a second set of steel bars 720. The second body 710 is composed of concrete-wrapped stirrups and the like. The second set of steel bars 720 is a vertically arranged column steel bar group, which is arranged in the second body 710 according to the designed interval and extends upward (in the Y-axis direction) from the top surface 715 of the second body 710. In this embodiment, the second set of steel bars 720 is only exemplified by two steel bars. In other embodiments, the number of the second set of steel bars 720 is multiple, for example, twelve or more. The second precast column 700 has a second end 730 and a third end 740 opposite to each other along the X-axis. The second end 730 of the second precast column 700 faces the first end 630 of the first precast column 600, and the third end 740 of the second precast column 700 faces the third precast column 800. The construction method in this embodiment includes setting an angle bracket 790 (or corner bracket) on the outer side of the third end 740 of the second precast column 700 and facing the third precast column 800, and making a top surface 795 of the angle bracket 790 roughly flush with the top surface 715 of the second body 710 of the second precast column 700. In this embodiment, a plurality of triangular angle brackets 790 are arranged in parallel along the Z axis and are set on the side surface of the third end 740 of the second precast column 700.

The third precast column 800 includes a third body 810 and a third set of steel bars 830. Similarly, the third body 810 is composed of concrete-wrapped stirrups. The third precast column 800 has a fourth end 840 and a fifth end 850 that are opposite to each other along the X-axis. The fourth end 840 of the third precast column 800 faces the third end 740 of the second precast column 700. The third set of steel bars 830 is a vertically arranged column steel bar group, which is arranged at intervals in the third body 810 according to the design, and includes a first main bar 860 and a second main bar 870. In this embodiment, the first main rib 860 in the third precast column 800 is adjacent to the fifth end 850 of the third precast column 800 and extends out of a top surface 815 of the third body 810 of the third precast column 800. The second main rib 870 in the third precast column 800 is adjacent to the fourth end 840 of the third precast column 800 and its top end is completely buried in the third precast column 800. In this embodiment, the top end of the second main rib 870 adjacent to the fourth end 840 of the third precast column 800 is further provided with a second connector 820 exposed outside the top surface 815. In the drawings of this embodiment, only one of the first main rib 860 and the second main rib 870 is used as an example. In other embodiments, the number of the first main ribs 860 and the second main ribs 870 may be multiple, for example, six or more each.

FIG. 2 is a second schematic diagram of the construction process according to the above-mentioned embodiment of the present disclosure. As shown in FIG. 2 , the first pre-cast beam 100 includes a first section 110, a second section 120 and a first steel bar 130. The first section 110 and the second section 120 are separated and arranged with a gap G. The first steel bar 130 penetrates and simultaneously connects the first section 110 and the second section 120 along the length direction of the first pre-cast beam 100 structure (i.e., the X-axis direction of FIG. 2 ). A free end 134 of the first steel bar 130 far from the second pre-cast column 700 passes through the first section 110 and extends in a direction above a side of the first pre-cast column 600 (Y-axis direction). A connecting end 132 of the first steel bar 130, which is opposite to the free end 134, extends outward from an end surface of the second section 120 in the first pre-cast beam 100. The figure of this embodiment only takes one first steel bar 130 as an example. In actual operation, the first steel bar 130 is generally a plurality of steel bars arranged and extending along the Z axis.

In this embodiment, a crane (not shown) is used to hoist the first pre-cast beam 100, so that the first pre-cast beam 100 spans and is disposed at its two ends (i.e., the first end 111 and the second end 112) on the first pre-cast column 600 and the second pre-cast column 700. In this embodiment, the cable 400 of the crane is tied to the stirrup hook 114 extending from the first section 110 of the first pre-cast beam 100 to hoist the first pre-cast beam 100. In other embodiments, the cable 400 of the crane can also be directly wrapped around the bottom of the first section 110 and fixed to directly hoist the first pre-cast beam 100. The opposite ends of the first section 110 (i.e., the first end 111 and the second end 112) are respectively disposed on the first end 630 and the second end 730 of the first precast column 600 and the second precast column 700, which are adjacent to each other. The second section 120 is disposed on the third end 740 of the second precast column 700, which is opposite to the second end 730. The gap G is now located above the second body 710 of the second precast column 700, and can accommodate the second set of steel bars 720 of the second precast column 700 without interfering with each other. In this embodiment, the step of suspending the first precast beam 100 further includes positioning at least a portion of the second section 120 of the first precast beam 100 on the top surface 795 of the angle bracket 790 fixed to the side of the second precast column 700. In other words, a portion of the second section 120 of the first pre-cast beam 100 is disposed on the second body 710, and another portion thereof is disposed on the angle bracket 790. By disposing the angle bracket 790, the area of the second section 120 disposed on the second pre-cast column 700 can be increased, thereby improving stability. In other embodiments, other angle brackets (not shown) can also be disposed on the first end 630 of the first pre-cast column 600 and the second end 730 of the second pre-cast column 700, respectively.

FIG3 is a third schematic diagram of the construction process according to the above implementation of the present disclosure. In this embodiment, a temporary support frame 900 is provided on the ground between the second precast column 700 and the third precast column 800, and the top surface 910 of the temporary support frame 900 is substantially flush with the top surface 715 of the second precast column 700 and the top surface 795 of the angle bracket 790.

FIG4 is a fourth schematic diagram of the construction process according to the above-mentioned embodiment of the present disclosure. The present embodiment provides a second pre-cast beam 200, which includes a body 210, a second steel bar 230 and a first connector 240. The body 210 of the second pre-cast beam 200 has a pre-set through-slot 214 extending along the length direction of the second pre-cast beam 200 (i.e., the X-axis direction shown in the figure), and includes a first end 211 and a second end 212 opposite to each other. In the present embodiment, the first connector 240 is embedded in the through-slot 214 in the first end 211. The second steel bar 230 extends from the second end 212 into the second end 212, so that its first end 231 extends into the through-slot 214 of the body 210 to be fixedly connected to the first connector 240. The second end 232 of the second steel bar 230 extends a distance away from the first pre-cast beam 100 outside the main body 210 and then bends upward (in the Y-axis direction).

In this embodiment, the second precast beam 200 is hoisted so that the first end 211 of the second precast beam 200 is disposed on the top surface 910 of the temporary support frame 900, and the second end 212 of the second precast beam 200 is disposed on the fourth end 840 of the third precast column 800 and above the top end of the second main reinforcement 870 in the third precast column 800. At this time, the second precast beam 200 is roughly aligned with the first precast beam 100 along the length direction (X axis), and the first end 211 of the second precast beam 200 is adjacent to the second section 120 of the first precast beam 100. In this embodiment, the second precast beam 200 is hoisted by tying the cable 400 of the crane to the stirrup hook 216 extending from the upper body 210 of the second precast beam 200. It should be noted that although the second end 212 of the second precast beam 200 is located on the fourth end 840 of the third precast column 800 and above the top of the second main reinforcement 870 in the third precast column 800, the second main reinforcement 870 and the second connector 820 are buried in the third body 810, so the hoisting of the second precast beam 200 will not interfere with the third precast column 800.

FIG5 is a fifth schematic diagram of the construction process according to the above embodiment of the present disclosure. According to the construction process of the present embodiment, following the above steps, the operator moves the second pre-cast beam 200 to the left along the X-axis so that the first connector 240 in the first end 211 of the second pre-cast beam 200 is coupled with the connecting end 132 of the first steel bar 130 in the first pre-cast beam 100 extending out of the second section 120 in the first pre-cast beam 100, thereby the second pre-cast beam 200 is coupled with the first steel bar 130 of the first pre-cast beam 100 through the first connector 240. At this time, since the second pre-cast beam 200 has been lifted off, the second connector 820 is exposed on the top surface 815 of the third pre-cast column 800. In more detail, this step is to align the second pre-cast beam 200 and the first pre-cast beam 100 along their respective length directions (i.e., the X-axis direction shown in FIG. 5 ), and to horizontally move the second pre-cast beam 200 toward the first pre-cast beam 100 to the left side in the figure, and to place the first end 211 of the second pre-cast beam 200 on the top surface 795 of the angle bracket 790, and the second end 212 of the second pre-cast beam 200 is still located on the top surface 815 of the third body 810 of the third pre-cast column 800, thereby coupling the first connector 240 in the second pre-cast beam 200 with the connecting end 132 of the first steel bar 130 in the first pre-cast beam 100 extending out of the second section 120 in the first pre-cast beam 100. In one embodiment, a gap may be reserved between the first precast beam 100 and the second precast beam 200, and concrete or mortar may be poured between the gap to connect the first precast beam 100 and the second precast beam 200. In other embodiments, the first precast beam 100 and the second precast beam 200 may be bonded to each other.

FIG6 is a schematic diagram of the construction process according to the above embodiment of the present disclosure. According to the construction process of this embodiment, following the above steps, the operator further includes fixing one end of a rear column steel bar 880 to the second connector 820 in the third pre-cast column 800, so that the rear column steel bar 880 is vertically connected to the third pre-cast column 800 along the Y axis. It should be noted that the rear column steel bar 880 and the first main bar 860 are designed in the Z axis direction to avoid the position of the second steel bar 230 to avoid interference with each other.

FIG7 is a schematic diagram of the construction process according to the above embodiment of the present disclosure. FIG8 is a right side view of the line segment 8-8 of FIG7. Please refer to FIG7 and 8 at the same time. According to the construction process of this embodiment, after the above steps, the operator further provides a third pre-cast beam 300, and hoists the third pre-cast beam 300 so that one end 310 of the third pre-cast beam 300 is disposed in the gap G between the first section 110 and the second section 120 of the first pre-cast beam 100, wherein the length direction of the third pre-cast beam 300 is along the Z axis and is substantially perpendicular to the length direction (X axis) of the first pre-cast beam 100 or the second pre-cast beam 200. The gap G between the first section 110 and the second section 120 is configured so that one end 310 of a third pre-cast beam 300 substantially perpendicular to the first pre-cast beam 100 and the second pre-cast beam 200 can be accommodated in the gap G. In more detail, one end 310 of the third pre-cast beam 300 is disposed on the sixth end 750 (as shown in FIG. 8 ) on one side between the second end 730 and the third end 740 of the second pre-cast column 700 on the top surface 715 of the second pre-cast column 700. On the other hand, as shown in FIG. 8 , the second pre-cast column 700 can also be provided with another angle bracket 760 and a temporary support frame 920 to support other parts of the third pre-cast beam 300. Afterwards, concrete can be poured between the first section 110 of the first precast beam 100, the second section 120 and the third precast beam 300 to form joints therebetween.

In other embodiments, the third pre-cast beam 300 may include two interval-arranged sections (not shown) connected by at least one steel bar. The two sections of the third pre-cast beam 300 may be respectively arranged on the sixth end 750 and the seventh end 770 opposite to each other on the top surface 715 of the second pre-cast column 700.

In summary, the precast structure and construction method disclosed in the present application are characterized by that the first precast beam and the second precast beam, which have a first section and a second section spaced apart by a first steel bar, are connected to each other, and are light in weight and can be quickly assembled on the precast column. Such a structural design and construction method can greatly improve the assembly efficiency of the precast beams and shorten the construction period. In detail, the precast structure and construction method disclosed in this application can save considerable space when hoisting precast beams. It is not necessary to adopt a step-by-step hoisting procedure as shown in FIG. 9A (the corresponding precast beams a and b on the upper and lower layers need to be hoisted in a step-by-step manner), but a vertical hoisting procedure as shown in FIG. 9B (the corresponding precast beams a' and b' on the upper and lower layers can be hoisted in an overlapping order) to save hoisting space and increase hoisting efficiency.

The term "a" or "an" herein is used to describe the elements and components of the present disclosure. This term is only for the convenience of description and to give the basic concept of the present disclosure. This description should be understood to include one or at least one, and unless otherwise clearly indicated, the singular also includes the plural. When used with the word "including" in the scope of the patent application, the term "a" can mean one or more than one. In addition, the term "or" herein means the same as "and/or".

Unless otherwise specified, spatial descriptions such as "above", "below", "upward", "left", "right", "downward", "body", "base", "vertical", "horizontal", "side", "higher", "lower", "upper", "above", "below" and the like are indicated with respect to the directions shown in the figures. It should be understood that the spatial descriptions used herein are for illustrative purposes only, and that the actual implementation of the structures described herein can be spatially arranged in any relative direction, and this limitation does not change the advantages of the disclosed embodiments. For example, in the description of some embodiments, providing an element "on" another element may cover the situation where the former element is directly on the latter element (e.g., in physical contact with the latter element) and the situation where one or more intervening elements are located between the former element and the latter element.

As used herein, the terms "substantially", "substantially", "roughly" and "approximately" are used to describe and take into account minor variations. When used in conjunction with an event or circumstance, these terms may refer to both situations where the event or circumstance definitely occurred and situations where the event or circumstance closely approximates to occurring.

The present disclosure is not limited to the specific structures or settings disclosed herein. A person with ordinary knowledge in the art to which the present disclosure belongs should understand that within the spirit of the present disclosure, the structures and settings disclosed herein can be changed or replaced to a certain extent. It should also be understood that the terms and terms describing directions or relative positions used herein are only used to describe specific implementations and facilitate explanation and understanding, and are not intended to limit the scope of the present disclosure.

110: Section 1

111: First end

112: Second end

114: Stirrup bend hook

120: Second section

130: First steel bar

132:Connection terminal

134: Free end

200: Second pre-cast beam

210:Entity

211: First end

212: Second end

214:Through slot

230: Second steel bar

231: First end

232: Second end

240: First connector

600: First pre-cast column

610: The first entity

615: Top

620: The first set of steel bars

630: First end

700: Second pre-cast column

710: Second body

715: Top

720: The second set of steel bars

730: Second end

740: The third end

790: Corner bracket

795: Top

800: The third pre-cast column

810: The third entity

815: Top

820: Second connector

830: The third set of steel bars

840: The fourth end

850: The fifth end

860: First main reinforcement

870: Second main reinforcement

880: Rear column reinforcement

900: Temporary support frame

910: Top surface

G: Gap

X: axial direction

Y: Axis

Z: Axial direction

Claims (10)

A precast structure construction method comprises: providing a first precast column, a second precast column and a third precast column arranged in sequence and spaced apart; providing a first precast beam, the first precast beam comprising a first section, a second section spaced apart from the first section, and a first steel bar penetrating the first section and the second section; hoisting the first precast beam so that the first precast beam is arranged across the first precast column and the second precast column, wherein two ends of the first section are respectively arranged on a first end and a second end of the first precast column and the second precast column adjacent to each other, and the second section The method comprises the steps of: providing a second precast beam, the second precast beam comprising a first end and a second end opposite to the first end; hoisting the second precast beam so that the first end of the second precast beam is disposed on a temporary support frame, and the second end of the second precast beam is disposed on a fourth end of the third precast column; and moving the second precast beam so that the first end of the second precast beam is coupled with a connecting end of the first steel bar in the first precast beam extending out of the second section of the first precast beam. The precast structure construction method of claim 1, wherein the first end of the second precast beam includes a first connector therein, and further includes a second steel bar extending into the second end and having one end fixedly connected to the first connector, wherein the step of moving the second precast beam includes: Aligning the second precast beam and the first precast beam along their respective length directions; and horizontally moving the second precast beam toward the first precast beam so that the first connector in the second precast beam is coupled to the connecting end of the first steel bar in the first precast beam extending out of the second section of the first precast beam. The precast structure construction method of claim 2 further comprises: providing a third precast beam; and hoisting the third precast beam so that one end of the third precast beam is disposed between the first section and the second section of the first precast beam, wherein a length direction of the third precast beam is substantially perpendicular to the length direction of the first precast beam or the second precast beam. The precast structure construction method of claim 1 further includes: setting an angle bracket on the outer side of the third end of the second precast column and facing the third precast column, and making a top surface of the angle bracket flush with the top surface of the second precast column; wherein the step of hoisting the first precast beam includes making at least a portion of the second section of the first precast beam be located on the angle bracket. As in claim 2, the precast structure construction method, wherein the third precast column includes a first main reinforcement and a second main reinforcement therein, wherein the first main reinforcement is adjacent to a fifth end of the third precast column opposite to the fourth end and extends out of a top surface of the third precast column, and the second main reinforcement is adjacent to the fourth end of the third precast column and is completely buried in the third precast column, wherein the step of hoisting the second precast beam includes: placing the second end of the second precast beam on the fourth end of the third precast column and above the second main reinforcement. The precast structure construction method of claim 5, wherein the top end of the second main reinforcement is provided with a second connector, and the method further comprises: coupling the second connector in the second precast beam with the connecting end of the first reinforcement in the first precast beam extending out of the second section in the first precast beam, and after the second connector is exposed to the top surface of the third precast column, fixing one end of a post-column reinforcement to the second connector in the third precast column. A precast structure, comprising: a first precast beam, comprising: a first section; a second section, which is spaced apart from the first section to form a gap between the first section and the second section; and a first steel bar, which connects and penetrates the first section and the second section along the length direction of the precast structure; and a second precast beam, which is roughly aligned with the first precast beam along its length direction and is adjacent to the second section of the first precast beam, and the second precast beam is coupled with the first steel bar of the first precast beam. The precast structure of claim 7 further comprises a first precast column, a second precast column and a third precast column, wherein the first precast beam is arranged across the first precast column and the second precast column, the two ends of the first section are respectively arranged on a first end and a second end of the first precast column and the second precast column adjacent to each other, the second section is arranged on a third end of the second precast column opposite to the second end, and a second end of the second precast beam is arranged on a fourth end of the third precast column. The precast structure of claim 7, wherein the second precast beam comprises: a body having a through slot extending along the length direction of the second precast beam, and comprising a first end and a second end opposite to the first end, wherein the first end is adjacent to the second section of the first precast beam; a second steel bar, one end of which extends into the through slot of the body, and the other end of which extends away from the first precast beam and bends upward; and a connector included in the first end of the second precast beam, wherein the connector is coupled to a connecting end of the first steel bar in the first precast beam extending out of the second section of the first precast beam, whereby the first steel bar and the second steel bar are coupled through the connector. The precast structure of claim 7, wherein the gap between the first section and the second section is configured so that one end of a third precast beam substantially perpendicular to the first precast beam and the second precast beam can be accommodated in the gap.

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