CN1995571A - Built-in steel truss concrete combined huge size beam column frame and its manufacture method - Google Patents

Abstract

The giant beam-column frame with built-in steel truss concrete composite and the manufacturing method of the present invention belong to a giant frame structure system used in high-rise buildings. The built-in steel truss concrete composite giant column is in the shape of a space cylinder. The section steel (6) in the corner column (3), the section steel diagonal support (9), and the steel bar diagonal support (10) constitute a steel truss. The steel bar diagonal support and the section steel diagonal support A spatial spiral in a giant column. A profiled steel beam (14) is set in the frame beam (13) of the built-in steel truss concrete composite giant beam, and the profiled steel beam, profiled steel diagonal support (19) and steel bar diagonal support (20) are combined to form a steel beam inside the concrete shear wall. truss. Compared with ordinary giant columns, the concrete composite giant column with built-in steel truss has better torsion resistance, and has great strength and rigidity against lateral force. Concrete composite giant beams with built-in steel trusses have higher load-carrying capacity than ordinary giant beams, and the decay of bearing capacity and stiffness is slower, and the shear slip damage is reduced.

Description

Built-in steel truss concrete composite giant beam-column frame and its manufacturing method

technical field

The invention relates to a giant beam-column frame with built-in steel truss concrete composite and a manufacturing method, belonging to a giant frame used in high-rise buildings.

Background technique

In the construction of high-rise residential buildings, large space and cost are important factors restricting its development. The application of mega-frame structures in high-rise residential buildings is proposed for these problems. The mega-frame structure is composed of a main frame and a sub-frame, also known as a main-sub-frame structure system. The main frame bears most of the horizontal loads and the vertical loads from the secondary structure. The secondary frame composed of ordinary beams and columns is set between the two main frames, which only plays an auxiliary role in the structure and energy dissipation under large earthquakes, and is responsible for transmitting the vertical load of the floor to the main frame. Therefore, the beam-column section is small and a large space can be formed under the main frame beam. The giant frame structure has the advantages of clear force transmission, good integrity, fast construction speed, material saving, and a variety of structural forms and material combinations.

In my country, high-rise buildings are mostly concrete structures, so the mega-frame structures that have been built are all reinforced concrete mega-frame structures. The main frame of the mega-frame structural system is a mega-frame composed of mega-beams and mega-columns, which are different from the usual concept of beams and columns. The main frame itself is an independent structure, in which the size of the giant columns is very large, and sometimes the span exceeds the column distance of an ordinary frame. The giant beams generally use concrete girders with a height of about one floor, and set up one every several floors. The main frame is the main anti-lateral force system, and the giant beams and giant columns are important components of the structure.

Usual reinforced concrete mega-beams and mega-columns are generally mega-box members. The mega-column is composed of four shear walls, and its stress characteristics are spatial stress structural components, which are quite different from the stress characteristics of the plane stress member shear walls, but the disadvantage of poor ductility of the shear walls is still certain. To a certain extent, it affects the full play of the seismic performance of giant columns. From the point of view of force, the main frame can be regarded as the combination of the transformation structure under the action of vertical force and the rigid layer under the action of horizontal force. In the presence of , the shear deformation of the giant column cannot be ignored. The reinforcement of the existing shear walls constituting the giant column is generally two rows of reinforcement mesh composed of horizontal and vertical distribution of steel bars, whose stiffness, bearing capacity and ductility are insufficient, resulting in shear failure and concrete crushing at the bottom of the wall pier under compression If the failure phenomenon occurs, the whole structure will be destroyed; the plastic hinge area at the bottom of the wall is small, and the seismic energy dissipation capacity is low; after shear oblique cracks appear in the shear wall, the bearing capacity of the giant column is likely to decrease rapidly. The giant beam not only bears its own weight, but also bears all the loads transmitted from the sub-frame supported on it. The existing concrete girders with a height of about one floor have poor ductility, and the structural stiffness degrades significantly after cracking under earthquake action, and the interstory displacement angle increases rapidly. The giant beams support several sub-structural floors, which are not only the main lateral force-resisting members, but also the main vertical load-bearing members. Their yield may cause excessive deformation of the main beams and affect the vertical bearing capacity of the secondary structures; , the absolute value of its deflection is also large. If it yields prematurely, it may cause damage to the secondary structure and equipment, and it is difficult to repair it after the earthquake.

Contents of the invention

The technical problem to be solved by the present invention is to significantly improve the earthquake resistance of giant structures, and a giant frame with built-in steel truss concrete composite giant beams and columns is proposed.

Refer to Fig. 2, Fig. 3, Fig. 4 and Fig. 5 for the technical scheme adopted by the giant column of the present invention. The provided concrete composite giant column with built-in steel truss is in the shape of a space cylinder, and each wall of it is composed of a built-in steel truss The concrete shear wall is connected in a closed shape, and the two adjacent shear walls are connected by a shared corner column. Each shear wall panel is equipped with a reinforcement mesh composed of horizontal and vertical distribution reinforcements. The reinforcement meshes are connected with tension reinforcement 12, and the diagonal reinforcement bundles composed of oblique reinforcement bundles are added between the two rows of distribution reinforcement meshes. The support 10 and the shaped steel diagonal support 9 at its core, the steel bar diagonal support 10 is constrained by the stirrup 11; every two shear walls are connected by a shared corner column 3, and the corner column 3 adopts a steel concrete structure, and the shaped steel 6 in the corner column 3 and The shaped steel diagonal brace 9 and the steel bar diagonal brace 10 constitute a steel truss, and the steel bar diagonal brace 10 and the shaped steel diagonal brace 9 are space spiral in the giant column.

For the giant concrete composite column with built-in steel truss, each shear wall panel in the giant column is respectively fixed with two steel bars within the height range of the storey (the lower half of the upper floor and the upper half of the lower floor). Diagonal support 10 and two profiled steel slant supports 9, the two slant supports are arranged crosswise in an X shape, the upper and lower ends of the steel bar slant supports 10 extend into the corner column 3 for anchoring, and the profile steel slant support 9 is welded to the flange of the profile steel 6 in the corner column 3 .

The manufacturing method of the built-in steel truss concrete composite giant column adopted in the present invention, its sequence is as follows:

1) Configure section steel 6 in the corner columns 3 at the four corners of the giant column;

2) Configure profiled steel diagonal supports 9 in each shear wall, and weld the upper and lower ends to the profiled steels 6 in the corner columns respectively;

3) Longitudinal bars 4 are arranged on the outside of the section steel 6, and quadrilateral stirrups 5 are bound on the outside of the longitudinal bars;

4) The steel bar diagonal support 10 is configured on the outer side of the shaped steel diagonal support 9, and the diagonal support stirrups 11 are bound on the outer side of the steel bar diagonal support;

5) Configure the horizontal and vertical distribution reinforcement bars 7, 8 and tie bars 12 of the shear walls on each surface to form two reinforcement mesh sheets;

6) Leave a certain thickness of protective layer on the outside of the corner column stirrup and the steel mesh of the shear wall panel to support the formwork;

7) The bottom part of the concrete composite giant column with built-in steel truss is formed by pouring and ramming the concrete at one time;

8) On the upper part of the formed cylinder, repeat the above 7 steps several times to form a concrete composite giant column with built-in steel truss.

The giant concrete composite column with built-in steel truss is a space-bearing component. The oblique support of steel bars in the giant column is like a spiral hoop from bottom to top (the giant column is regarded as a vertical cantilever hollow member), which can play a role of resistance. Torsional effect, with great strength and rigidity against lateral force. After the coupling beam is damaged, it still has the ability to bear the vertical load, so that the structure will not collapse after the rare earthquake. Compared with ordinary reinforced concrete giant columns, it has better earthquake resistance.

The technical scheme adopted by the built-in steel truss concrete composite giant beam of the present invention is: the built-in steel truss concrete composite giant beam is composed of frame beams 13 and shear wall panels, and the shear wall panels are equipped with horizontally and vertically distributed steel bars 17 and 18 form the steel mesh, and use tensioning steel bars 22 to connect between the steel mesh, add profile steel diagonal support 19 between the two rows of steel mesh, steel bar diagonal support 20, frame beam 13 is provided with profile steel beam 14, profile The combination of steel beam 14, section steel diagonal support 19 and steel bar diagonal support 20 forms a steel truss inside the concrete shear wall.

The built-in steel truss concrete composite gigantic beam, the shaped steel diagonal supports 19 and steel bar diagonal supports 20 arranged in a herringbone network in the steel mesh of the shear wall panel, the upper end of which extends into the upper frame beam 13 and the middle shape of the beam. The steel beam 14 is connected, and the lower end extends into the lower frame beam 13, and is connected with the medium-sized steel beam 14 of the lower frame beam. Internally formed steel trusses.

The built-in steel truss concrete composite giant beam, the profiled steel diagonal support 19 and steel bar diagonal support 20 fixed in the shear wall steel mesh are arranged in an X-shaped network, and its upper end extends into the upper frame beam 13 to connect with the beam The medium-sized steel beam 14 is connected, and the lower end extends into the lower frame beam 13, and is connected with the lower frame beam medium-sized steel beam 14. The steel diagonal support 19 is combined with the steel bar diagonal support 20 and the steel beam 14 in the frame beam 13. Steel trusses are formed inside the walls.

The manufacturing method of the built-in steel truss concrete composite giant beam adopted in the present invention, its sequence is as follows:

1) configure the profile steel 14 in the frame beam 13;

2) Configure profiled steel oblique supports 19, and the upper and lower ends are respectively welded to the profiled steel 14 in the frame beam;

3) Configure frame beam longitudinal reinforcement 15 at the outer four corners of the profile steel 14, and tie stirrups 16 outside the frame beam longitudinal reinforcement;

4) Arranging a steel bar diagonal support 20 on the outer side of the shaped steel diagonal support 19, and binding the diagonal support stirrups 21 on the outer side of the steel bar diagonal support;

5) Configure the horizontal and vertical distribution of steel bars 17, 18 and tension bars 22 of the giant beam wall panels to form two steel mesh sheets;

6) Leave a certain thickness of protective layer on the outer side of frame beam stirrups and wall panel reinforcement mesh to support formwork;

7) The poured and rammed concrete is formed into a concrete composite giant beam with built-in steel truss at one time.

The built-in steel truss concrete composite gigantic beam adopted in the present invention is a geometrically invariant system, which itself is a very good force transmission system. In the transmission of force, the bond between steel and concrete does not play a major role, and bond failure is not easy to occur. The presence of built-in steel trusses increases the bearing capacity of the mega-beams and prevents premature yielding of the mega-beams. Compared with ordinary giant beams, the bearing capacity is improved, the bearing capacity and stiffness decay slowly, the seismic performance is relatively stable, and the shear slip damage is reduced. The main frame composed of giant beams and columns is the main anti-seismic part of the giant frame structure, which improves the seismic capacity of the giant beams and columns, and also improves the overall seismic capacity of the structure. When the building encounters a strong earthquake, it can reduce its earthquake damage and prevent its collapsed.

Description of drawings

Figure 1 is a schematic diagram of the giant frame structure;

Fig. 2 is a schematic diagram of the layout of the medium-sized steel oblique brace and the reinforced oblique brace of the concrete composite giant column with built-in steel truss in the present invention. Schematic diagram of the diagonal support in a shear wall of the cylinder rising in a spiral shape in space, where A1-B1-C1-D1-A2-B2-C2-D2, A2-B2-C2-D2-A3-B3-C3- D3, A3-B3-C3-D3-A4-B4-C4-D4, A4-B4-C4-D4-A5-B5-C5-D5 respectively represent a structural unit of the barrel. A1-B2-B1-A2, A2-B3-B2-A3 are two X-shaped diagonal supports in a shear wall;

Fig. 3 is a schematic diagram of the reinforcement of a shear wall structure in a structural unit of the built-in steel truss concrete composite giant column of the present invention, and the reinforcement diagrams of the other three sides are the same as this figure;

Fig. 4 is the enlarged schematic view of A-A section in Fig. 3;

Fig. 5 is the enlarged schematic view of B-B section in Fig. 3;

Fig. 6 is a schematic diagram of structural reinforcement when the medium-sized steel slant support and steel bar slant support of the built-in steel truss concrete composite giant beam of the present invention are arranged in a herringbone network;

Fig. 7 is the enlarged schematic view of A-A section in Fig. 6;

Fig. 8 is the enlarged schematic view of B-B section in Fig. 6;

Fig. 9 is a schematic diagram of structural reinforcement when the steel truss-concrete composite giant beam with a built-in steel truss is arranged in an X-shaped network when the medium-sized steel diagonal supports and steel bar diagonal supports are arranged in an X-shaped network.

Among them, in the figure:

1- Mega column, 2- Mega beam, 3- Corner column, 4- Longitudinal reinforcement in corner column, 5- Square stirrup in corner column, 6- Shaped steel in corner column, 7- Mega column wall board lateral distribution reinforcement, 8- Longitudinal distribution of steel bars on the wall panels of giant columns, 9- oblique support of built-in steel bars in giant columns, 10- oblique support of built-in steel bars in giant columns, 11- stirrups of oblique supports of reinforcement bars in giant columns, 12- the gap between two pieces of steel mesh in giant columns Tie bars, 13-Frame beams of mega beams, 14-Section steel in frame beams of mega beams, 15-Frame beam longitudinal reinforcement of mega beams, 16-Frame beam rectangular stirrups of mega beams, 17-Mega beam wall panels Horizontal distribution of steel bars, 18-longitudinal distribution of steel bars on giant beam wall panels, 19-slope support of built-in steel bars in giant beams, 20-slope support of built-in steel bars in giant beams, 21-stirrups of diagonal support of steel bars in giant beams, 22-two giant beams Tension bars between sheets of mesh.

Detailed ways

The giant column embodiment of the present invention is described in further detail in conjunction with the accompanying drawings:

The schematic diagrams of the reinforcement of a shear wall structure in a structural unit of the built-in steel truss concrete composite giant column are shown in Figure 3, Figure 4 and Figure 5. It is composed of a steel concrete corner column and a shear wall panel with built-in support. Its quadrilateral section corner column 3 adopts a steel concrete structure, and the reinforcement includes four steel bars 4 and two intersecting I-shaped steel 6, and the quadrilateral stirrups 5 are evenly bound along the longitudinal bars of the column, and the stirrups are distributed throughout the height of the column. ; The reinforcement of the shear wall is to arrange the shear wall panel steel bars 7 and 8 evenly respectively along the horizontal and vertical directions on both sides, and bind and fix them at the intersection points to form two pieces of steel mesh, and insert the two ends of the steel bar 7 respectively Anchorage is carried out in the corner post to meet the requirements of the anchorage length. The configuration of the oblique support is that the two steel meshes of the shear wall panels in the height area of the lower half of the upper floor and the upper half of the lower floor are respectively fixed symmetrically with the X-shaped oblique support 10 made of steel bars and oblique steel bars. The diagonal support formed by the support 9 is located at the core of the steel bar diagonal support 10 . The upper end and the lower end of the steel bar diagonal support 10 all stretch into the corner post 3 for anchoring, and the shaped steel diagonal support 9 is welded with the flange of the profiled steel 6 in the corner post 3 . The profile steel 6 in the corner column 3 and the profile steel oblique support 9 constitute a steel truss. Stirrups 11 are evenly fixed on the outside of the four steel bars of the obliquely supporting longitudinal bars 10, and the reinforcing bar obliquely supporting 10, the obliquely supporting profiled steel 9 and the uniformly distributed stirrups 11 are connected to form a concrete obliquely supporting skeleton, and the concrete obliquely supporting is formed after the concrete is poured . Other structural reinforcements include that the two steel meshes of the seismic wall are connected by tension bars 12 with a spacing of less than or equal to 600mm.

The production method is as follows:

1) Configure section steel 6 in the corner columns 3 at the four corners of the giant column;

2) Configure shaped steel oblique supports 9 in each shear wall, and the upper and lower ends are respectively welded with the shaped steel 6 in the corner columns to form X-shaped oblique supports;

3) Longitudinal bars 4 are arranged on the outside of the section steel 6, and quadrilateral stirrups 5 are bound on the outside of the longitudinal bars;

4) Arranging a steel bar diagonal support 10 on the outer side of the shaped steel diagonal support 9, and binding the diagonal support stirrups 11 on the outer side of the steel bar diagonal support;

5) Configure the horizontal and vertical distribution reinforcement bars 7, 8 and tie bars 12 of the shear walls on each surface to form two reinforcement mesh sheets;

6) Leave a certain thickness of protective layer on the outside of the corner column stirrup and the steel mesh of the shear wall panel to support the formwork;

7) Pouring and ramming the concrete at one time to form the bottom part of the concrete composite giant column with built-in steel truss.

8) On the upper part of the formed cylinder, repeat the above 6 steps several times to form a concrete composite giant column with built-in steel truss.

The embodiment of the giant beam of the present invention is described in further detail in conjunction with the accompanying drawings:

Example 1

The structural reinforcement diagrams of the built-in steel truss concrete composite giant beam are shown in Figure 6, Figure 7 and Figure 8. It is composed of a steel concrete frame beam 13 and a steel diagonal support 19 with a built-in herringbone network arrangement and a steel bar diagonal Constructed of 20 braced concrete shear walls. The shaped steel beam of the frame beam is I-beam 14, with longitudinal reinforcement 15 arranged around it, and rectangular stirrups 16 are evenly bound along the longitudinal reinforcement of the beam, and the stirrups of the frame beam are evenly distributed to the beam end; the reinforcement of the shear wall is, Horizontal reinforcement bars 17 and longitudinal reinforcement bars 18 of the shear wall panels are evenly arranged on both sides along the horizontal and vertical directions, and are bound and fixed at the intersection points to form two reinforcement meshes. The two ends of the longitudinal reinforcement bars 18 are respectively inserted into the frame beams, and Make it meet the requirements of the anchorage length respectively. The configuration of the oblique support is to configure four reinforcing bar oblique supports 20 in the two pieces of steel mesh of the shear wall panel, the interior of the reinforcing bar oblique supports 20 is provided with profiled steel oblique supports 19, and the outer sides of the rebar oblique supports 20 are uniformly adorned with stirrups 21. Its upper end stretches into the upper frame beam 13 to connect with the beam medium-sized steel beam 14, and the lower end extends into the lower frame beam 13 to connect with the lower frame beam medium-sized steel beam 14. Steel beams 14 are combined to form steel trusses inside the concrete shear walls. The two steel meshes of the shear wall are connected by tension bars 22 with a spacing less than or equal to 600 mm.

The manufacturing method of the built-in steel truss concrete composite giant beam adopted in the present invention, its sequence is as follows:

1) configure the profile steel 14 in the frame beam 13;

2) Configure profiled steel oblique supports 19, and the upper and lower ends are respectively welded to the profiled steel 14 in the frame beam;

3) Configure frame beam longitudinal reinforcement 15 at the outer four corners of the profile steel 14, and tie stirrups 16 outside the frame beam longitudinal reinforcement;

4) Arranging a steel bar diagonal support 20 on the outer side of the shaped steel diagonal support 19, and binding the diagonal support stirrups 21 on the outer side of the steel bar diagonal support;

5) Configure the horizontal and vertical distribution of steel bars 17, 18 and tension bars 22 of the giant beam wall panels to form two steel mesh sheets;

6) Leave a certain thickness of protective layer on the outer side of frame beam stirrups and wall panel reinforcement mesh to support formwork;

7) The poured and rammed concrete is formed into a concrete composite giant beam with built-in steel truss at one time.

Example 2

The second structural form of the concrete composite giant beam with built-in steel truss is shown in Fig. 9, which is to set X-shaped steel diagonal supports 19 and steel bar diagonal supports 20 inside the two pieces of steel mesh in the shear wall panel. Other aspects are the same as the first form.

Claims (7)

1, built-in steel truss concrete combined huge size post is the space tubular, and its each face wall body is connected by the built-in steel truss concrete shear wall and is closed, is connected by shared corner post between the adjacent two sides shear wall; Dispose the steel mesh reinforcement of forming by horizontal and vertical distribution reinforcement in the every shear wall slab, between steel mesh reinforcement, socket with socketing reinforcing bar (12), it is characterized in that: add between two row's distribution reinforcement nets and be furnished with the reinforcing bar bearing diagonal (10) that oblique tendon constitutes and the shaped steel bearing diagonal (9) of its core, reinforcing bar bearing diagonal (10) retrains with stirrup (11); Connect by shared corner post (3) between the shear wall of every two sides, corner post (3) adopts steel reinforced concrete structure, shaped steel (6) in the corner post (3) constitutes steel truss with shaped steel bearing diagonal (9), reinforcing bar bearing diagonal (10), and reinforcing bar bearing diagonal (10) and shaped steel bearing diagonal (9) are spatially spiral shape in huge post.

2, built-in steel truss concrete combined huge size post according to claim 1, it is characterized in that: in every shear wall slab in the huge post in the floor height altitude range, promptly go up the Lower Half of floor and the first half of following floor, installing two reinforcing bar bearing diagonals (10) and two shaped steel bearing diagonals (9) respectively, two bearing diagonal arranged crosswise are X-shaped, corner post (3) anchoring is all stretched in the top and bottom of reinforcing bar bearing diagonal (10), the edge of a wing welding of the shaped steel (6) in shaped steel bearing diagonal (9) and the corner post (3).

3, built-in steel truss concrete combined huge size beam, constitute by frame beam (13) and shear wall slab, the steel mesh reinforcement that configuration is made up of transversely distributed steelbar (17) and vertical distribution reinforcement (18) in shear wall slab, between steel mesh reinforcement, socket with socketing reinforcing bar (22), it is characterized in that: between two placing of reinforcement nets, add and join shaped steel bearing diagonal (19), reinforcing bar bearing diagonal (20), section steel beam (14) is set in the frame beam (13), section steel beam (14), shaped steel bearing diagonal (19) and reinforcing bar bearing diagonal (20) combination are at the inner steel truss that forms of concrete shear force wall.

4, built-in steel truss concrete combined huge size beam according to claim 3, it is characterized in that: the shaped steel bearing diagonal (19) and the reinforcing bar bearing diagonal (20) that dispose in the shear wall slab steel mesh reinforcement are the netted layout of herringbone, its upper end is stretched in the upper side frame beam (13) and is connected with section steel beam (14) in the beam, the lower end is stretched in the lower frame beam (13), be connected with section steel beam (14) in the lower frame beam, section steel beam (14) combination in shaped steel bearing diagonal (19) and reinforcing bar bearing diagonal (20), the frame beam (13) is at the inner steel truss that forms of concrete shear force wall.

5, built-in steel truss concrete combined huge size beam according to claim 3, it is characterized in that: the shaped steel bearing diagonal (19) and the reinforcing bar bearing diagonal (20) that install in the shear wall slab steel mesh reinforcement are the netted layout of X-shaped, its upper end is stretched in the upper side frame beam (13) with section steel beam (14) wherein and is connected, the lower end is stretched in the lower frame beam (13), be connected with section steel beam (14) in the lower frame beam, section steel beam (14) combination in shaped steel bearing diagonal (19) and reinforcing bar bearing diagonal (20), the frame beam (13) is at the inner steel truss that forms of concrete shear force wall.

6, the preparation method of built-in steel truss concrete combined huge size post is characterized in that: may further comprise the steps:

1) configuration shaped steel (6) in the corner post (3) in four bights of huge post;

2) configuration shaped steel bearing diagonal (9) in each face shear wall, upper and lower side respectively with corner post in shaped steel (6) welding;

3) the vertical muscle (4) of shaped steel (6) exterior arrangement, vertical muscle outside colligation quadrangle stirrup (5);

4) shaped steel bearing diagonal (9) outside configuration reinforcement bearing diagonal (10) is at reinforcing bar bearing diagonal outside colligation bearing diagonal stirrup (11);

5) dispose horizontal and vertical distribution reinforcement (7), (8) and the connecting lacing wire (12) of each face shear wall, form two reinforced mesh;

6) stay certain protective layer thickness, a template at the corner post stirrup and the shear wall wallboard reinforced mesh outside;

7) the disturbing concrete one-shot forming is the base section of the concrete combined huge size post of built-in steel truss;

8) on established shell portion top, repeatedly repeat above 7 steps, form the concrete combined huge size post of built-in steel truss.

7, the preparation method of built-in steel truss concrete combined huge size beam is characterized in that: may further comprise the steps:

1) shaped steel (14) in the configuration frame beam (13);

2) configuration shaped steel bearing diagonal (19), upper and lower side respectively with the frame beam in shaped steel (14) welding;

3) at the outside four jiaos of vertical muscle (15) of configuration frame beam of shaped steel (14), at the vertical muscle of frame beam outside colligation stirrup (16);

4) at shaped steel bearing diagonal (19) outside configuration reinforcement bearing diagonal (20), at reinforcing bar bearing diagonal outside colligation bearing diagonal stirrup (21);

5) horizontal and vertical distribution reinforcement (17), (18) and the connecting lacing wire (22) of the huge beam wallboard of configuration form two reinforced mesh;

6) stay certain protective layer thickness, a template at the frame beam stirrup and the wallboard reinforced mesh outside;

7) the disturbing concrete one-shot forming is the concrete combined huge size beam of built-in steel truss.

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