TWI900165B - Grid beam unit and construction method using the same - Google Patents

Abstract

The present disclosure relates to a grid beam unit and a construction method. The grid beam unit includes a plate, a first longitudinal concrete body and multiple pairs of second longitudinal concrete bodies. The first longitudinal concrete body is disposed on the plate and extends along a first axial direction. The multiple pairs of second longitudinal concrete bodies are disposed on the plate, spaced apart along a second axial direction perpendicular to the first axial direction and extend outwardly from the opposing sides of the first longitudinal concrete body. Multiple corrugated steel pipes are embedded along the first axial direction in a lower portion of the first longitudinal concrete body.

Description

Lattice beam unit and construction method using the same

The present disclosure relates to a lattice beam unit and a construction method using the lattice beam unit, and more particularly to a precast lattice beam unit and a construction method using the precast lattice beam unit.

Lattice slab structures are widely used in civil engineering and construction, particularly in manufacturing plant construction. High-tech manufacturing plants, such as wafer fabs, often utilize lattice slabs as the primary structural support for mounting equipment. Due to their seismic resistance, lattice slabs are now widely used in factory floor construction to meet the requirements of wafer fabs for stable installations of precision process equipment, requiring floor slabs to withstand even minor vibrations.

The use of precast grating structures utilizes several precast concrete columns within each unit span, combined with various precast grating layers. This minimizes construction time and significantly reduces the amount of on-site grating work required by the wafer fab, ensuring structural safety, compliance with design requirements, ease of transportation, rapid construction, and aesthetics. Precast grating structures offer the following advantages: Because the grating units are prefabricated, precision and flatness are easily controlled; the grating units are high-quality and uniform; concrete is poured on-site, ensuring the gratings are fully bonded; the precast gratings are strong enough to support their own weight and construction loads; the only remaining on-site work is hoisting, eliminating the need for extensive scaffolding and improving construction flow; and the construction period is shortened.

However, as the grating slabs need to be provided with numerous perforations and a steel reinforcement structure surrounding such perforations to provide the grating slabs with the required strength, the above construction method involves the setting of the grating slab moulds, the steel reinforcement turns and the setting of the formwork, and the construction needs to be carried out at a certain height above the precast concrete columns, which results in a certain degree of construction difficulty and complexity.

Therefore, the industry has long been looking forward to providing a systematic grating construction method that can improve construction efficiency and a grating structure completed according to the construction method, so as to effectively shorten the construction period to complete the construction of high-tech factories.

To achieve the above-mentioned objectives, one embodiment of the present disclosure relates to a lattice beam unit comprising a plate, a first elongated concrete body, and a plurality of pairs of second elongated concrete bodies. The first elongated concrete body is disposed on the plate and extends along a first axial direction. The plurality of pairs of second elongated concrete bodies are disposed on the plate and extend outwardly from opposite sides of the first elongated concrete body at intervals along a second axial direction, with the first axial direction being perpendicular to the second axial direction. A plurality of first spiral corrugated sleeves extending along the first axial direction are embedded in a lower portion of the first elongated concrete body.

Another embodiment of the present disclosure relates to a construction method comprising: providing four columns at each of the four corners of a substantially perpendicular quadrilateral site, and four semi-precast beams connecting the four columns; providing a plurality of lattice beam units; arranging the lattice beam units parallel to a pair of the four semi-precast beams between the four semi-precast beams; and connecting the lattice beam units and the four semi-precast beams with steel bars.

The following describes the present disclosure in detail with reference to the accompanying drawings, including various embodiments. It should be noted that the present disclosure is intended only to illustrate one specific aspect of the present disclosure and is not intended to limit the scope of the present disclosure. The dimensions and relative proportions of the components in the drawings are for illustrative purposes only. Unless specifically defined, the dimensions and relative proportions of the components are not intended to limit the scope of the present disclosure.

Figure 1 is a three-dimensional schematic diagram illustrating a construction process 1 according to an embodiment of the present disclosure. In this process, four columns 10, 12, 14, and 16 are first provided at the four corners of a quadrilateral site. The four perimeters of the quadrilateral site extend along a first axis A1 and a second axis A2 that are substantially perpendicular to each other. Four semi-precast beams 20, 22, 24, and 26 are then connected to the tops of the four columns 10, 12, 14, and 16. A plurality of steel bars 11, 13, 15, and 17 extend upward from the tops of the columns 10, 12, 14, and 16. The four semi-precast beams 20, 22, 24, and 26 surround and form a quadrilateral space within the space. The semi-cast beams 20, 22, 24, and 26 are each provided with a plurality of stirrups 200, 220, 240, and 260, partially embedded within the body of the semi-cast beams 20, 22, 24, and 26, with their free ends formed into inverted hooks and extending above the top of the semi-cast beams 20, 22, 24, and 26. In some embodiments of the present disclosure, the columns 10, 12, 14, and 16 are precast columns, which are prefabricated in a factory and then transported to the construction site for installation.

In this embodiment, the inner sides of a pair of opposing semi-cast beams 20, 24, among the four semi-cast beams 20, 22, 24, and 26, are each provided with a plurality of spaced-apart sets of grooves 21 and engaging grooves 210 (see the inner side of the semi-cast beam 20 in FIG1 ). The engaging grooves 210 are located within the grooves 21, with the top ends of the grooves 21 and engaging grooves 210 exposed at the top edge of the semi-cast beam 20.

In this embodiment, the lower portion of the inner side of the semi-cast beams 20, 22, 24, and 26 has a plurality of connecting pieces 212 located below the groove 21 (see the inner side of the semi-cast beam 20 in Figure 1), which can be used to accommodate steel bars that can be passed through them for connection.

Figures 2A and 2B are perspective views (first and second), respectively, of a first lattice beam unit according to an embodiment of the present disclosure. As shown in Figures 2A and 2B , the first lattice beam unit 30 comprises a plate 33, a first elongated concrete body 31, and a plurality of pairs of second elongated concrete bodies 32 and 34. The plate 33 is a rectangular plate. The first elongated concrete body 31 is disposed on one side of the plate 33 and extends along a first axis A1. The plurality of pairs of second elongated concrete bodies 32 and 34 are disposed on the same side of the plate 33 and extend outward from opposite sides of the first elongated concrete body 31 at intervals along a second axis A2. In some embodiments of the present disclosure, the first elongated concrete body 31 and the plurality of pairs of second elongated concrete bodies 32 and 34 are manufactured by pouring concrete in a metal mold (not shown) in a precast integrally formed manner.

As shown in FIG2B , in this embodiment, the length D1 of the plurality of pairs of second elongated concrete bodies 32 located on one side of the first elongated concrete body 31 is different from the length D2 of the plurality of pairs of second elongated concrete bodies 34 located on the other side of the first elongated concrete body 31. In this embodiment, the length D1 of the second elongated concrete bodies 32 is greater than the length D2 of the second elongated concrete bodies 34. Furthermore, in this embodiment, a plurality of grooves 35 and 36 are formed between the plurality of adjacent pairs of second elongated concrete bodies 32 and 34, and between at least one side of the first elongated concrete body 31 and the plate 33.

As shown in Figure 2A, the first lattice beam unit 30 further includes a first set of stirrups 300 extending along a first axial direction A1, and a second set of stirrups 310 extending along a second axial direction A2. Each of the first set of stirrups 300 is partially embedded within the first elongated concrete body 31 and the slab 33 along the first axial direction A1. Each of the two free ends of the stirrups extends through the top of the slab 33 and has a hook at its end. Each of the second set of stirrups 310 is partially embedded within the plurality of second elongated concrete bodies 32 and 34 along the second axial direction A2. Each of the two free ends of the stirrups extends through the top of the slab 33 and has a hook at its end.

Figure 2C is a schematic cross-sectional view taken along line 2C-2C in Figure 2A. A plurality of first spiral corrugated sleeves 314 are embedded in the lower portion of the first elongated concrete body 31. These sleeves extend along the first axial direction A1 within the first elongated concrete body 31, and each of the plurality of first spiral corrugated sleeves 314 has a receiving space therein. As shown in Figures 2A to 2C, in the disclosed embodiment, a metal connecting plate 312 is vertically embedded above the outer sides of the plurality of first spiral corrugated sleeves 314, at opposite ends of the first elongated concrete body 31. Below one end of the first elongated concrete body 31, a space is provided with a first recessed portion 316, located below the inner side of the metal connecting plate 312. In this embodiment, the ends of the first elongated concrete body 31 have a vertical groove 317 extending through its thickness, with its two ends exposed to the upper side of the plate 33 and the first recessed portion 316, respectively. A lower portion 302 of the outermost portion of the first set of stirrups 300 is located within the first recessed portion 316. Furthermore, as shown in FIG2C , the first elongated concrete body 31 has another vertical groove 318 extending through its thickness, a predetermined distance from the vertical groove 317 and toward the interior of the first elongated concrete body 31. One end of the vertical groove 318 is exposed to the upper side of the plate 33, and the other end is connected to the first spiral sleeve 314. Vertical grooves 317 and 318 are configured to subsequently accommodate cement mortar.

In some embodiments of the present disclosure, only one end of the first elongated concrete body 31 is provided with a metal connecting plate 312 and a first recessed portion 316. In some other embodiments, only one end of the first elongated concrete body 31 is provided with a metal connecting plate 312 but does not have a first recessed portion 316.

Figure 2D is a schematic cross-sectional view of Figure 2A along line 2D-2D. A plurality of second spiral sleeves 320 are embedded in the lower portion of at least one pair of the second elongated concrete bodies 32 and 34, extending transversely through the elongated concrete body 31 along the second axis A2. A second recessed portion 322 is formed on one side of the second elongated concrete body 32, with one end of the second spiral sleeve 320 exposed in the second recessed portion 322. A lower portion 311 of the outermost portion of the second set of stirrups 310 is located within the second recessed portion 322. This side of the second elongated concrete body 32 has a vertical groove 324 extending through its thickness, with its ends exposed at the upper side of the plate 33 and the second recessed portion 322, respectively. The second elongated concrete body 32 has another vertical groove 326 extending through its thickness at a predetermined distance from the vertical groove 324 and facing the first elongated concrete body 31. Its two ends are exposed on the upper side of the plate 33 and connected to the second spiral corrugated sleeve 320. The vertical grooves 324 and 326 are configured to subsequently accommodate cement mortar.

Figures 3A and 3B are schematic perspective views (first and second) of a second lattice beam unit 40 according to an embodiment of the present disclosure. The second lattice beam unit 40 has a substantially identical structure to the first lattice beam unit 30. The primary difference between the two is that the multiple pairs of second elongated concrete bodies 42 and 44 of the second lattice beam unit 40, located on either side of the first elongated concrete body 41, have identical lengths D3 and D4. In some embodiments of the present disclosure, the lattice beam can be combined with first lattice beam units 30 and second lattice beam units 40 of varying lengths and sizes, depending on design requirements. The second lattice beam unit 40 further includes a first set of stirrups 400 extending along the first axis A1. A portion of each stirrup is embedded within the first elongated concrete body 41 and the plate 43 along the first axis A1, while another portion of each stirrup extends from the top of the plate 43 and has a bent hook. The second lattice beam unit 40 further includes a second set of stirrups 410 extending along the second axis A2. A portion of each stirrup is embedded within the plurality of second elongated concrete bodies 42 and 44 along the second axis A2, while another portion of each stirrup extends from the top of the plurality of second elongated concrete bodies 42 and 44 and has a bent hook.

Please refer to Figure 4, which shows the second lattice beam unit 40, two first lattice beam units 30, and third lattice beam unit 50 arranged along the second axis A2 before assembly. In this embodiment, the shape of the third lattice beam unit 50 can be a mirror image of the second lattice beam unit 40. The second lattice beam unit 40 and the third lattice beam unit 50 are located outside the two first lattice beam units 30.

Figures 5A and 5B are, respectively, perspective views of the second construction process according to the aforementioned embodiment of the present disclosure. Figure 5C is a top view of the second construction process according to the aforementioned embodiment of the present disclosure. In process 2, the second lattice beam unit 40, the two first lattice beam units 30, and the third lattice beam unit 50 are sequentially hoisted and arranged parallel to the four semi-cast beams 20, 22, 24, and 26.

As shown in FIG5B , after the adjacent second lattice beam unit 40, the two first lattice beam units 30, and the third lattice beam unit 50 are assembled and connected by connecting their respective connecting steel bars (not shown), their sides abut and correspond to each other, so that the grooves 35, 36 on their respective bottom sides correspond and connect, or abut against the semi-precast beams 20, 22, 24, 26 to form a plurality of lattice grooves 71, 72.

Figure 6A is a schematic cross-sectional view taken along line 6A-6A in Figure 5C . Taking the first lattice beam unit 30 as an example, the first steel bars 37 are placed within the first spiral sleeves 314 embedded in the first elongated concrete body 31, with one end positioned within the first recess 316. One end of the first elongated concrete body 31 is placed against the groove 25, and the metal connecting plate 312 embedded in one end of the first elongated concrete body 31 is engaged with a corresponding engagement groove 250 of the semi-cast beam 24. At this point, the first lattice beam unit 30 is connected to the semi-cast beams 20 and 24 through the engagement relationship between the metal connecting plate 312 and the engagement groove 210.

Figure 6B is a second schematic cross-sectional view of Figure 6A . Along the first axial direction A1, one free end of the first rebar 37 is pulled out, extending beyond a corresponding end of the first elongated concrete body 31 and passing through a connector 242 within the semi-precast beam 24 to connect with the rebar 244 within the semi-precast beam 24. The connector 242 is fixedly connected to one end of the rebar 244.

Figure 6C is a third schematic cross-sectional view of Figure 6A. Cement mortar 319 is poured from the vertical grooves 317 and/or 318 into the interior of the first spiral sleeve 314 and the first recess 316 and allowed to solidify. In this embodiment, a template 80 is placed beneath the first recess 316 to cover it and prevent leakage of the cement mortar 319. This secures the first lattice beam unit 30 to the semi-cast beam 24. The second lattice beam unit 40, the first lattice beam unit 30, and the third lattice beam unit 50, as shown in Figure 5A, can also be secured to the semi-cast beams 20 and 24 at their respective ends along the first axis A1 using the same method.

Figure 7A is a schematic cross-sectional view of Figure 5C along line 7A-7A. Taking the second lattice beam unit 40 as an example, a second steel bar 48 is provided, passing through the interior of the second spiral sleeve 420 and extending beyond the two side ends of the corresponding second elongated concrete body 42, with one free end of the second steel bar 48 positioned within the second recess 422. In some embodiments of the present disclosure, the second steel bar 48 is also connected to the second steel bar (not shown) within the adjacent first lattice beam unit 30 shown in Figure 2D via a connector, or a sufficient length of second steel bar 48 is provided to directly and continuously pass through the second spiral sleeve 420 of the second lattice beam unit 40 and the second spiral sleeve 320 within the first lattice beam unit 30.

FIG7B is a second schematic cross-sectional view of FIG7A . The free end of the second steel bar 48 is pulled out and extends beyond a corresponding end of the second elongated concrete body 42 and passes through the connecting piece 222 of the semi-precast beam 22 to connect with the steel bar 224 of the semi-precast beam 22. The connecting piece 222 is fixed to one end of the steel bar 224.

Figure 7C is a third schematic cross-sectional view of Figure 7A . Cement mortar 419 is poured from the vertical grooves 424 and/or 426 into the interior of the second spiral sleeve 420 and the second recess 422 and allowed to solidify. In this embodiment, a template 82 is placed outside the second recess 422 to prevent leakage of the cement mortar 419. This allows one side (outer side) of the second lattice beam unit 40 to be secured to the semi-precast beam 22 (the other side being anchored to the first lattice beam unit 30). The third lattice beam unit 50, as shown in Figure 5A , can also be secured along the second axis A2 with one side (outer side) to the semi-precast beam 26 (the other side being anchored to another first lattice beam unit 30) using the same method.

Please refer to Figure 5A. After the second construction process, the third construction process is carried out: concrete is poured on the plurality of second lattice beam units 40, the two first lattice beam units 30, the third lattice beam unit 50, the four semi-precast beams 20, 22, 24, 26, and the columns 10, 12, 14, 16, and the first set of stirrups 300, 400, the second set of stirrups 310, 410 protruding from the second lattice beam units 40, the two first lattice beam units 30, and the third lattice beam unit 50, and the stirrups 200, 220, 240, 260 on the semi-precast beams 20, 22, 24, 26, thereby forming a flat lattice floor 70 as shown in Figure 8. Concrete is poured on the columns 10 , 12 , 14 , and 16 to form four columns 18 corresponding to the lattice floor 70 .

In summary, the precast structure and construction method disclosed in this application utilizes multiple lattice beam units arranged side by side between multiple columns. Steel bars are threaded through spiral sleeves within the lattice beam units to connect with the column side reinforcement, or the lattice beam units are connected to each other via the reinforcement. This allows for rapid formation of a lattice plate structure between the columns, thereby improving production efficiency. In some embodiments, metal connecting plates at one end of the lattice beam units can be snapped into slots on the beams, further enabling rapid splicing.

The terms "a" or "an" are used herein to describe elements and components of the present disclosure. This terminology is used merely for convenience and to provide a basic understanding of the present disclosure. This description should be understood to include one or at least one, and unless otherwise expressly stated, the singular also includes the plural. When used with the word "comprising" in the claims, the term "a" or "an" may mean one or more than one. Additionally, the term "or" herein is synonymous with "and/or."

Unless otherwise specified, spatial descriptions such as "above," "below," "upward," "left," "right," "downward," "body," "base," "vertical," "horizontal," "side," "higher," "lower," "upper," "above," and "below" are intended to refer to the directions shown in the figures. It should be understood that the spatial descriptions used herein are for illustrative purposes only, and that actual implementations of the structures described herein can be spatially arranged in any relative orientation without altering the advantages of the disclosed embodiments. For example, in the description of some embodiments, referring to an element as being "on" another element may encompass both the situation where the preceding element is directly on (e.g., physically in contact with) the subsequent element and the situation where one or more intervening elements are located between the preceding and subsequent elements.

As used herein, the terms "substantially," "approximately," and "approximately" are used to describe and take into account minor variations. When used in conjunction with an event or circumstance, these terms can mean both the situation where the event or circumstance definitely occurred and the situation where the event or circumstance closely resembled the occurrence.

The present disclosure is not limited to the specific structures or configurations disclosed herein. Those skilled in the art will appreciate that these structures and configurations disclosed herein may be modified or permuted to some extent within the spirit of the present disclosure. It should also be understood that the terminology and terms describing directions or relative positions used herein are used solely to describe specific embodiments and facilitate illustration and understanding and are not intended to limit the scope of the present disclosure.

10: Column 11: Steel bars 12: Column 13: Steel bars 14: Column 15: Steel bars 16: Column 17: Steel bars 18: Column 20: Semi-precast beam 21: Groove 22: Semi-precast beam 24: Semi-precast beam 25: Groove 26: Semi-precast beam 27: Connector 30: First lattice beam unit 31: First long concrete body 32: Second long concrete body 33: Slab 34: Second long concrete body 35: Groove 36: Groove 37: First steel bars 38: Second steel bars 40: Second lattice beam unit 41: First long concrete body 42: Second elongated concrete body 43: Plate 44: Second elongated concrete body 48: Second steel bar 50: Third lattice beam unit 70: Lattice base 71: Lattice slot 72: Lattice slot 80: Formwork 82: Formwork 200: Stirrups 210: Snap-fit slot 212: Connector 220: Stirrups 222: Connector 224: Steel bar 240: Stirrups 250: Snap-fit slot 242: Connector 244: Steel bar 260: Stirrups 300: Stirrups 302: Lower section 310: Stirrups 311: Lower section 312: Metal connecting plate 314: First spiral corrugated sleeve 316: First recessed portion 317: Vertical trough 318: Vertical trough 319: Cement mortar 320: Second spiral corrugated casing 322: Second recessed portion 324: Vertical trough 326: Vertical trough 400: Stirrups 410: Stirrups 419: Cement mortar 420: Second spiral corrugated casing 422: Second recessed portion 424: Vertical trough 426: Vertical trough A1: First axial direction A2: Second axial direction D1: Length D2: Length D3: Length D4: Length

The following figures are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. Figure 1 is a schematic perspective view illustrating a construction process according to an embodiment of the present disclosure. Figure 2A is a schematic perspective view of a first lattice beam unit according to an embodiment of the present disclosure. Figure 2B is a schematic perspective view of the first lattice beam unit according to the embodiment. Figure 2C is a schematic cross-sectional view taken along line 2C-2C in Figure 2A. Figure 2D is a schematic cross-sectional view taken along line 2D-2D in Figure 2A. Figure 3A is a schematic perspective view of a second lattice beam unit according to an embodiment of the present disclosure. Figure 3B is a second perspective schematic diagram of the second lattice beam unit of the above-mentioned embodiment. Figure 4 is a schematic perspective diagram showing two of the above-mentioned first lattice beam units, one of the above-mentioned second lattice beam units, and one of the third lattice beam units before assembly. Figure 5A is a first perspective schematic diagram of a second construction process according to the above-mentioned embodiment of the present disclosure. Figure 5B is a second perspective schematic diagram of a second construction process according to the above-mentioned embodiment of the present disclosure. Figure 5C is a top view of a second construction process according to the above-mentioned embodiment of the present disclosure. Figure 6A is a first cross-sectional schematic diagram along line 6A-6A in Figure 5C. Figure 6B is a second cross-sectional schematic diagram of Figure 6A. Figure 6C is a third cross-sectional schematic diagram of Figure 6A. Figure 7A is a first cross-sectional schematic diagram along line 7A-7A in Figure 5C. Figure 7B is a second cross-sectional schematic diagram of Figure 7A. Figure 7C is a schematic cross-sectional view of Figure 7A (see Figure 7C). Figure 8 is a schematic three-dimensional view of construction process 3 according to the aforementioned embodiment of the present disclosure.

30: First lattice beam unit

40: Second lattice beam unit

50: Third lattice beam unit

A1: First Axis

A2: Second Axis

Claims (10)

A lattice beam unit comprises: a plate; a first elongated concrete body disposed on the plate and extending along a first axial direction; and a plurality of pairs of second elongated concrete bodies disposed on the plate and extending outwardly along a second axial direction at intervals from opposite sides of the first elongated concrete body, the first axial direction being perpendicular to the second axial direction. Each of the plurality of pairs of second elongated concrete bodies includes a free end. A plurality of first spiral corrugated sleeves extending along the first axial direction are embedded in a lower portion of the first elongated concrete body. The lattice beam unit of claim 1, wherein a plurality of second spiral sleeves are embedded in a lower portion of at least one pair of the second elongated concrete bodies, extending transversely through the elongated concrete bodies along the second axis. The lattice beam unit further comprises: a plurality of first steel bars disposed within the plurality of first spiral sleeves and having one end extending beyond a corresponding end portion of the first elongated concrete bodies; and a plurality of second steel bars, each extending through the plurality of second spiral sleeves and extending beyond both side ends of the pair of second elongated concrete bodies. As in the lattice beam unit of claim 2, a metal connecting plate is embedded in one end of the first elongated concrete body above the plurality of first spiral sleeves. The lattice beam unit of claim 3, wherein the plurality of pairs of second elongated concrete bodies have different lengths on both sides of the first elongated concrete body, and the plurality of pairs of second elongated concrete bodies form a groove between at least one side of the first elongated concrete body and the plate. As in the lattice beam unit of claim 4, a first recessed portion is provided inwardly at the end of the first elongated concrete body below the metal connecting plate. A lattice beam unit as claimed in claim 5, wherein the first elongated concrete body has a vertical groove running through it in the thickness direction, the two ends of the vertical groove are exposed to the plate body and the first recessed portion respectively, and the vertical groove is configured to accommodate cement mortar. A construction method comprises: Providing four columns at four corners of a substantially perpendicular quadrilateral site, and four semi-precast beams connecting the four columns; Providing a plurality of lattice beam units as described in claim 6; Arranging the plurality of lattice beam units between the four semi-precast beams in a manner parallel to a pair of the four semi-precast beams; Connecting steel bars between the plurality of lattice beam units and between the plurality of lattice beam units and the four semi-precast beams. The construction method of claim 7, wherein the inner side of the other pair of the four semi-precast beams is provided with a plurality of spaced-apart engaging grooves, and the step of interconnecting the plurality of lattice beam units and the plurality of lattice beam units with the steel bars of the four semi-precast beams comprises: Entering the metal connecting plate embedded in the end of the first elongated concrete body into an engaging groove of one of the corresponding semi-precast beams of the other pair. The construction method of claim 8 further comprises: disposing the plurality of first steel bars within the plurality of first spiral corrugated sleeves with one end positioned within the recessed portion; and passing the plurality of second steel bars through the plurality of second spiral corrugated sleeves of the plurality of lattice beam units with both ends extending beyond both side ends of the second elongated concrete body on the outermost side of the plurality of lattice beam units. The construction method of claim 9 further comprises: Pouring cement mortar into the interior of the plurality of first spiral corrugated sleeves and the first recessed portion; and Pouring cement mortar into the interior of the plurality of second spiral corrugated sleeves within the second elongated concrete body and a second recessed portion on a side of the second elongated concrete body.