Lattice type steel reinforced concrete composite wall and assembly type underground structure system

Abstract

The invention relates to a lattice type steel-reinforced concrete laminated wall and an assembly type underground structure system. The lattice type steel-reinforced concrete laminated wall comprises two construction forms, namely a double-side lattice type steel-reinforced concrete laminated wall and a single-side lattice type steel-reinforced concrete laminated wall. The double-side lattice type steel-reinforced concrete laminated wall comprises two laminated prefabricated steel-reinforced concrete wallboards, and concrete is poured in a cavity between the two prefabricated steel-reinforced concrete composite wallboards. According to the single-side lattice type steel-reinforced concrete laminated wall structure, an enclosure wall of an underground structure is adopted as a laminated panel on one side, a prefabricated steel-reinforced concrete wall plate is adopted on the other side, and concrete is poured into a cavity between the enclosure wall and the prefabricated steel-reinforced concrete wall plate; the prefabricated steel-reinforced concrete wallboard comprises a steel-reinforced framework and a concrete wall body, the steel rib framework comprises embedded columns, vertical steel ribs and transverse batten materials. Compared with the prior art, the construction speed is increased; the structure is simple, the design is reasonable, the construction is convenient, and the input cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and particularly relates to a lattice steel reinforced concrete composite wall and an assembled underground structure system. Background Art

[0002] The assembled structure has the advantages of fast construction speed, low carbon environmental protection, material saving, labor saving, etc. The assembled structure mainly includes structural forms such as steel structure, precast concrete structure, steel-concrete composite structure, and wood structure. At present, 60% - 70% of the newly built assembled buildings in China are precast reinforced concrete structures. In addition to buildings, precast structures are also increasingly developed and adopted in subway stations and underground structures. Compared with building structures, subway stations and underground structures not only need to meet the structural stress requirements but also need to be waterproof. In addition, subway stations and underground structures are subject to large forces and the structural members are large in size, which also poses certain difficulties for assembly. Due to the large self-weight of large components, large lifting machinery and equipment are required for construction. Therefore, the assembly technology of the wall is very crucial for realizing the assembly of subway stations and underground structures.

[0003] (1) Assembled Concrete Wall Structure System

[0004] The common assembled concrete wall structures can be divided into a precast integral concrete wall structure system and a composite wall structure system.

[0005] 1) Precast Integral Concrete Wall Structure System

[0006] The main components of the precast integral concrete wall structure include precast integral concrete wall panels, composite beams, composite slabs, etc. These are all precast completely in the factory and transported to the site, and form a complete structure through vertical and lateral connections. Its construction speed is fast, reducing the demand for labor and material resources, reducing environmental pollution, and improving the degree of building industrialization. However, due to the large weight of precast components, the transportation cost is higher and the on-site hoisting difficulty is greater.

[0007] In addition, the vertical steel bar connection of the precast integral concrete wall is a construction difficulty. Its connection methods mainly include the wet connection method through grouting sleeves, the construction quality is difficult to control, the construction efficiency is low, and the construction speed is slowed down. In addition, the bearing capacity of the steel bar grouting sleeve connection node is very small before the concrete hardens, and additional supports need to be set, increasing the construction cost. The precast integral concrete wall structure has certain defects.

[0008] 2) Composite Wall Structure System

[0009] In order to reduce the lifting weight, the laminated wall is a good solution. The laminated shear wall generally refers to the double-sided laminated plate shear wall, which is composed of two layers of precast reinforced concrete plates connected by trusses or connectors into a wall panel member with a middle cavity. The cavity separated in the middle is used for casting concrete on site, belonging to a semi-precast structural system. The distributed steel bars of the laminated wall can be directly precast in the two side panels; the two side panels are connected into one body through connectors (such as steel bar trusses, steel sections, stud bolts, etc.). The vertical connection between the walls is realized through the cast-in-place layer concrete and the inserted steel bars, which improves the construction speed and quality. The precast and connected panels can be directly used as an integrated formwork. After being fixed, concrete can be poured in its cavity. After the cast-in-place concrete hardens, it can be bonded with the panel to jointly bear the force. Compared with the precast integral concrete wall, the precast part of the laminated wall is lighter, the transportation cost is lower, the construction difficulty is lower, and the construction energy consumption is also lower; compared with the traditional cast-in-place concrete structure, the laminated wall uses precast panels as an integrated formwork that does not need to be disassembled, saving a large amount of formwork materials and having higher construction efficiency.

[0010] The traditional precast panel of the laminated wall uses a reinforced concrete plate. Like the precast integral concrete wall, the connection problem of the steel bars in the panel is a construction difficulty.

[0011] (2) Existing prefabricated underground structures and their characteristics

[0012] The existing prefabricated underground structures can be mainly divided into two categories according to the assembly method: fully prefabricated underground structures and laminated prefabricated underground structures.

[0013] 1) Fully prefabricated underground structures The fully prefabricated underground structure means that the main structure is entirely assembled by precast components. For example, a certain subway station (Station A) has a single-arch double-layer horseshoe-shaped structure. The structure of the assembled section of the station consists of 7 precast blocks such as the bottom slab, side walls, and top slab. The single-piece weights of the precast blocks reach 37.6 tons, 39.5 tons, 31.0 tons, 48.3 tons, and 54.3 tons respectively, and the weight of each ring is about 280 tons. It can be seen from this construction example that even after the fully prefabricated underground structure is split into multiple precast components, the volume and mass of a single component are still relatively large, which will lead to greater difficulty and higher cost in component transportation and construction assembly. In addition, due to the dry connection used in this type of structure, the structure waterproof problem is relatively prominent.

[0015] 2) Laminated prefabricated underground structures

[0016] The laminated prefabricated underground structure means that part or all of the main structure is built with laminated components. The laminated components include various forms such as laminated walls, laminated arches, laminated plates, and laminated beams. At present, only a small number of underground structures in China have adopted the laminated prefabricated structure, etc.

[0017] The structure of a certain subway station (Station A) is a two-story, three-span rectangular structure. The main structure utilizes a block-like construction pattern with a cast-in-place base slab, precast side walls, and steel pipe columns, composite beams, and composite slabs. The commonly used connection method for above-ground prefabricated concrete components, rebar grouting sleeves, was introduced into the underground structure design for the vertical rebar connections of the precast side walls. However, its shortcomings were not fully avoided: the numerous rebar sleeves on each precast side wall section necessitated high precision positioning of the vertical rebar and grouting sleeves during construction, and specialized side wall installation equipment was required to assist in the construction.

[0018] The structural station (Station B) of a certain subway station features a double-deck, double-span rectangular frame structure, employing a prefabricated, single-sided composite wall panel system with internal bracing. The station's assembled section utilizes prefabricated components in a 3-meter-long ring. The station floor is cast integrally on-site, while the side walls of the station's roof are single-sided prefabricated composite components. Prefabricated components are used for the inner side walls and lower surface of the roof, while the outer side walls, upper surface of the roof, and the joints are cast in-situ with composite concrete.

[0019] The above-mentioned composite prefabricated underground structure has a relatively long construction period due to the presence of cast-in-place reinforced concrete parts. The connection between the prefabricated side walls and the floor slabs still mostly adopts the wall panel connection method of the traditional prefabricated structure, which has many nodes, complex structure and difficult construction.

[0020] In summary, all existing prefabricated wall structures and prefabricated underground structure systems have certain deficiencies that need to be improved. Summary of the Invention

[0021] The purpose of the present invention is to overcome the defects of the above-mentioned existing technologies such as complex connection, slow construction speed and large support requirements, and to provide a lattice steel-concrete composite wall and prefabricated underground structure system to improve construction speed; the structure is simple, the design is reasonable, the construction is convenient and the investment cost is low.

[0022] The present invention provides a lattice steel-concrete composite wall, which includes two structural forms: a double-sided lattice steel-concrete composite wall and a single-sided lattice steel-concrete composite wall;

[0023] The double-sided lattice steel-concrete composite wall comprises two prefabricated steel-concrete wall panels stacked together, with concrete poured in the cavity between the two prefabricated steel-concrete composite wall panels;

[0024] The single-sided lattice steel-reinforced concrete composite wall structure uses the retaining wall of the underground structure as a composite panel on one side and precast steel-reinforced concrete wall panels on the other side. Concrete is poured in the cavity between the retaining wall and the precast steel-reinforced concrete wall panels.

[0025] The precast steel reinforced concrete wall panel comprises: a steel reinforced framework and a concrete wall body; the steel reinforced framework comprises: concealed columns, vertical steel members, and transverse bracings; the steel reinforced framework is hidden inside the concrete wall body;

[0026] Concealed columns are arranged at both ends of the precast steel reinforced concrete wall panel, and additional concealed columns are arranged in the middle of the wall body when necessary to improve the mechanical performance of the wall body; the concealed columns are connected to the vertical steel members, and the vertical steel members are connected to each other by transverse bracings to form an integral steel reinforced framework. After pouring concrete on the integral steel reinforced framework, an exposed part is formed at the end side, and the exposed part is used for on-site connection.

[0027] Furthermore, in the double-sided lattice steel reinforced concrete composite wall, shear keys are arranged on the inner sides of two precast steel reinforced concrete wall panels; in the single-sided lattice steel reinforced concrete composite wall, shear keys are arranged on the precast steel reinforced concrete wall panel; the shear keys comprise: stud bolts, embedded steel bar heads, and profiled steels.

[0028] Furthermore, the vertical steel members comprise: rolled steel sections, welded steel sections, cold-formed steel sections, and cold-formed steel plates; the cross-sectional forms of the vertical steel members include: angle steels, channel steels, I-beams, cross-shaped steels, L-shaped steels, and C-shaped steels.

[0029] Furthermore, the transverse bracings comprise: angle steel bracings, steel plate gussets, and steel bars.

[0030] Furthermore, the arrangement forms of the transverse bracings between the concealed columns and the vertical steel members, and between the vertical steel members are arranged longitudinally along the length of the wall body, including being orthogonal and obliquely intersecting with the vertical steel members; the connection methods of the transverse bracings include weld connection, bolt connection, and bolt-weld hybrid connection.

[0031] The present invention also provides an assembled underground structure system applying a lattice steel reinforced concrete composite wall, comprising: a floor slab, a bottom beam, precast beams, precast columns, a lattice steel reinforced concrete composite wall, a floor slab, a precast roof slab, and a concrete cast-in-place layer;

[0032] The lattice steel reinforced concrete composite wall is vertically connected at joints through lattice steel members, and horizontally connected at joints through lattice steel members on both sides to form a composite wall area; the vertical joint connection forms a vertical splicing joint, and the horizontal joint connection forms a horizontal splicing joint; the composite wall area is connected to the floor slab through wall panel connection joints.

[0033] Furthermore, the vertical splicing joint uses angle steel as the first connecting member to splice the upper and lower lattice steel reinforced concrete composite walls into one, that is, the exposed parts of the upper and lower lattice steel reinforced concrete composite walls are spliced through the angle steel; concrete is poured at the vertical splicing joint to gradually form the shear wall area. The connection method between the first connecting member and the lattice steel reinforced concrete composite shear wall includes, but is not limited to, welded connection, bolt connection, and bolt-weld hybrid connection.

[0034] Furthermore, the horizontal splicing joint is formed by splicing the exposed parts of two adjacent lattice steel reinforced concrete composite walls on the left and right. The connection method between the exposed parts of two adjacent lattice steel reinforced concrete composite walls on the left and right includes, but is not limited to, welded connection, bolt connection, and bolt-weld hybrid connection, and then concrete is poured at the horizontal splicing joint of the shear wall body to gradually form the shear wall area.

[0035] Furthermore, corbels are provided at the inner precast wall panels of the lattice steel reinforced concrete composite wall. The precast floor slab is placed on the corbels, and the extended floor slab reinforcement bars are inserted into the gaps between the two precast wall panels. Finally, concrete is poured in the gaps to achieve anchoring connection. The advantage of this connection method is that the connection between the upper and lower lattice steel reinforced concrete composite walls can be ensured not to be broken, and the overall mechanical properties are better; alternatively, the precast floor slab is placed on the inner precast wall panels of the lattice steel reinforced concrete composite wall, and the extended floor slab reinforcement bars are inserted into the gaps between the two precast wall panels. Finally, concrete is poured in the gaps to achieve anchoring connection. A ring beam can be selectively added at the wall panel connection node to ensure the overall performance at the node.

[0036] Furthermore, the floor slab includes: steel truss floor decking, precast slab, composite slab, cast-in-place reinforced concrete floor slab.

[0037] The steel materials used for the concealed column, vertical steel reinforcement, and transverse bracing members include, but are not limited to, ordinary structural steel and high-strength steel; the concrete used for the concrete wall body includes, but is not limited to, ordinary concrete, high-strength concrete, and high-performance concrete.

[0038] The lattice steel reinforced concrete composite wall components can be used in combination with other structural systems to form a composite structural system; other structural systems include, but are not limited to, frame structure, tube structure, steel structure, cast-in-place shear wall structure.

[0039] The present invention can be widely applied to various underground military buildings (such as shooting emplacements, observation emplacements, shelter emplacements, etc.), civilian buildings (including residential buildings, public buildings), various civil air defense projects, industrial buildings, transportation and communication buildings, warehouse buildings, and various underground public facilities (such as underground water treatment plants, solid or liquid waste treatment plants, pipeline corridors, etc.).

[0040] Compared with the prior art, the present invention has the following advantages:

[0041] (1) The lattice steel reinforced concrete composite wall structure has both the good assemblability of steel structures and the good durability and fire resistance of concrete structures, and can overall meet the requirements of the normal service state.

[0042] (2) The precast wall panels of the lattice steel reinforced concrete composite wall are produced in the factory, and it is easier to ensure the quality of the components.

[0043] (3) The on-site connection of the lattice steel reinforced concrete composite wall can be regarded as the connection between steel members, without the need for steel bar connection. Therefore, it is more convenient than the connection of traditional shear walls and is easy for on-site assembly.

[0044] (4) When installing between precast components, dry connections such as bolt connection and welding are adopted, and then a sufficiently thick cast-in-place concrete layer is poured, and the structure has good waterproof performance.

[0045] (5) The lattice steel reinforced concrete composite wall has good strength and stiffness after node connection, does not require or can reduce temporary supports, and does not need to wait for the concrete in the node area to harden to carry out subsequent processes, having the advantages of reducing formwork support and improving construction efficiency. Description of the Drawings

[0046] Figure 1 It is a schematic diagram of the precast assembled lattice steel reinforced concrete underground structure system in the present invention.

[0047] Figure 2 It is a schematic diagram of the structure of the precast steel reinforced concrete wall panel in the present invention: (a) 3D schematic diagram; (b) internal steel member schematic diagram; (c) front view schematic diagram; (d) top view.

[0048] Figure 3 It is a schematic diagram of the structure of the connection node in the present invention: (a) schematic diagram of the vertical splicing node of the lattice steel reinforced concrete composite wall; (b) schematic diagram of the horizontal splicing node of the lattice steel reinforced concrete composite wall.

[0049] Figure 4 It is a detailed construction drawing of the vertical splicing node of the double-sided lattice steel reinforced concrete composite wall in the present invention.

[0050] Figure 5 It is a detailed construction drawing of the vertical splicing node of the single-sided lattice steel reinforced concrete composite wall in the present invention.

[0051] Figure 6 It is a detailed construction drawing of the connection node between the double-sided lattice steel reinforced concrete composite wall and the structural roof slab in the present invention, including the cases of not setting a ring beam and setting a ring beam: (a) the precast roof slab is placed on the corbel; (b) the precast roof slab is placed on the inner wall panel.

[0052] Figure 7 This is the detailed construction drawing of the connection node between the single-sided lattice steel reinforced concrete composite wall and the structural roof slab in the present invention, including the cases of not setting a ring beam and setting a ring beam: (a) The precast roof slab is placed on the corbel; (b) The precast roof slab is placed on the inner wall panel.

[0053] Figure 8 This is the detailed construction drawing of the connection node between the double-sided lattice steel reinforced concrete composite wall and the middle slab (floor slab) in the structure of the present invention, including the cases of not setting a ring beam and setting a ring beam: (a) The case where the precast middle slab (floor slab) is placed on the corbel; (b) The case where the precast middle slab (floor slab) is placed on the inner wall panel; (c) The precast middle slab (floor slab) is placed on the inner wall panel, and embedded parts are arranged in the precast middle slab (floor slab) for connection with the upper wall panel.

[0054] Figure 9 This is the detailed construction drawing of the connection node between the single-sided and double-sided lattice steel reinforced concrete composite wall and the middle slab (floor slab) in the structure of the present invention, including the cases of not setting a ring beam and setting a ring beam: (a) The case where the precast middle slab (floor slab) is placed on the corbel; (b) The case where the precast middle slab (floor slab) is placed on the inner wall panel; (c) The precast middle slab (floor slab) is placed on the inner wall panel, and embedded parts are arranged in the precast middle slab (floor slab) for connection with the upper wall panel.

[0055] Figure 10 This is the detailed construction drawing of the connection node between the double-sided lattice steel reinforced concrete composite wall and the cast-in-place floor slab in the structure of the present invention.

[0056] Figure 11 This is the detailed construction drawing of the connection node between the single-sided and double-sided lattice steel reinforced concrete composite wall and the cast-in-place floor slab in the structure of the present invention.

[0057] Reference numerals: 101 - concealed column, 102 - vertical steel, 103 - transverse bracing, 104 - concrete wall, 105 - exposed part. Detailed implementation manners

[0058] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Features such as component models, material names, connection structures, control methods, algorithms, etc. that are not clearly described in this technical solution are all regarded as common technical features disclosed in the prior art.

[0059] Embodiment 1

[0060] As Figure 2 shown, this embodiment provides a lattice steel reinforced concrete composite wall, including two structural forms: double-sided lattice steel reinforced concrete composite wall and single-sided lattice steel reinforced concrete composite wall;

[0061] The double-sided lattice steel reinforced concrete composite wall comprises two precast steel reinforced concrete wall panels 10 which are laminated, and concrete is poured in the cavity between the two precast steel reinforced concrete composite wall panels;

[0062] The single-sided lattice steel reinforced concrete composite wall structure uses the retaining wall of the underground structure as one side of the laminated panel, and the other side uses the precast steel reinforced concrete wall panel 10, and concrete is poured in the cavity between the retaining wall and the precast steel reinforced concrete wall panel 10;

[0063] The precast steel reinforced concrete wall panel 10 comprises: a steel skeleton and a concrete wall body 104; the steel skeleton comprises: concealed columns 101, vertical steel members 102, and transverse bracings 103; the steel skeleton is hidden inside the concrete wall body 104;

[0064] Concealed columns 101 are arranged at both ends of the precast steel reinforced concrete wall panel 10, and concealed columns 101 are additionally arranged in the middle of the wall body if necessary to improve the mechanical performance of the wall; the concealed columns 101 are connected to the vertical steel members 102, and the vertical steel members 102 are connected to each other by transverse bracings 103 to form an integral steel skeleton. After concrete is poured on the integral steel skeleton, an exposed part 105 is formed at the end side, and the exposed part 105 is used for on-site connection.

[0065] In the specific implementation manner, in the double-sided lattice steel reinforced concrete composite wall, shear keys are arranged on the inner sides of the two precast steel reinforced concrete wall panels 10; in the single-sided lattice steel reinforced concrete composite wall, shear keys are arranged on the precast steel reinforced concrete wall panel 10; the shear keys include: stud bolts, embedded steel bar heads, and profiled steels;

[0066] In the specific implementation manner, the vertical steel member 102 includes: rolled steel, welded steel, cold-formed steel, and cold-bent steel plates; the cross-sectional forms of the vertical steel member 102 include: angle steel, channel steel, I-beam, cruciform steel, L-shaped steel, and C-shaped steel.

[0067] In the specific implementation manner, the transverse bracing 103 includes: angle steel bracing bars, steel plate gussets, and steel bars.

[0068] In the specific implementation manner, the arrangement form of the transverse bracings 103 between the concealed columns 101 and the vertical steel members 102, and between the vertical steel members 102 is arranged longitudinally along the length of the wall, including being orthogonal and oblique to the vertical steel members 102; the connection methods of the transverse bracings 103 include weld connection, bolt connection, and bolt-weld hybrid connection.

[0069] As Figure 1As shown in the figure, this embodiment also provides an assembled underground structural system using lattice steel reinforced concrete composite walls, including: a floor slab, a bottom beam, precast beams, precast columns, lattice steel reinforced concrete composite walls, floor slabs, precast roof slabs, and a cast-in-place concrete layer;

[0070] As Figure 3 , 4 , 5, 6, 7, 8, 9, 10, 11 shown, the lattice steel reinforced concrete composite walls are vertically connected at joints through lattice steel, and horizontally connected at joints through lattice steel on both sides to form a composite wall area; the vertical joint connections form vertical splicing joints, and the horizontal joint connections form horizontal splicing joints; the composite wall area is connected to the floor slab through wall panel connection joints.

[0071] As Figure 3 shown, in the specific implementation, the vertical splicing joint uses angle steel as the first connecting piece to splice the upper and lower lattice steel reinforced concrete composite walls into one body, that is, the exposed parts 105 of the upper and lower lattice steel reinforced concrete composite walls are spliced through angle steel; concrete is poured at the vertical splicing joint to gradually form a shear wall area. The connection method between the first connecting piece and the lattice steel reinforced concrete composite shear wall includes but is not limited to welded connection, bolt connection, and bolt-weld hybrid connection.

[0072] The horizontal splicing joint is formed by splicing the exposed parts 105 of two adjacent lattice steel reinforced concrete composite walls on the left and right into one body. The connection method between the exposed parts 105 of two adjacent lattice steel reinforced concrete composite walls on the left and right includes but is not limited to welded connection, bolt connection, and bolt-weld hybrid connection, and then concrete is poured at the horizontal splicing joint of the shear wall body to gradually form a shear wall area.

[0073] As Figure 6 , 7 , 8, 9, 10, 11 shown, in the specific implementation, corbels are provided at the inner precast wall panels of the lattice steel reinforced concrete composite walls, the precast floor slabs are placed on the corbels, and the floor slab extended steel bars are inserted into the gaps between the two precast wall panels, and finally concrete is poured in the gaps to achieve anchoring connection. The advantage of this connection method is that the connection between the upper and lower lattice steel reinforced concrete composite walls can be ensured not to be broken, and the overall mechanical properties are better; or, the precast floor slabs are placed on the inner precast wall panels of the lattice steel reinforced concrete composite walls, and the floor slab extended steel bars are inserted into the gaps between the two precast wall panels, and finally concrete is poured in the gaps to achieve anchoring connection. A ring beam can be selectively added at the wall panel connection joint to ensure the overall performance at the joint.

[0074] In the specific implementation, the floor slab includes: steel truss floor decks, precast slabs, composite slabs, and cast-in-place reinforced concrete floor slabs.

[0075] After the nodes in this embodiment are connected, they have good strength and stiffness, do not require or can reduce temporary supports, and do not need to wait for the concrete in the node area to harden before subsequent processes can be carried out, which can greatly improve the construction speed. Its structure is simple, the design is reasonable, the construction is convenient, and the input cost is relatively low, which can effectively solve the problems existing in the traditional precast shear wall structure, such as complex connections, slow construction speed, and large demand for supports.

[0076] The construction sequence is as follows:

[0077] 1) The precast parts of several lattice steel reinforced concrete composite walls are spliced through vertical splicing nodes or horizontal splicing nodes to form a precast composite wall area; through design calculations, ensure that the connection nodes of the composite wall have sufficient strength and stiffness, so that they can bear the construction load, and the upper structure construction can be carried out without pouring concrete, which helps to improve the construction efficiency;

[0078] 2) Connect the floor slab to the precast composite wall area through wall panel connection nodes;

[0079] 3) Pour concrete into the vertical splicing nodes of the composite wall, the horizontal splicing nodes of the composite wall, the wall panel connection nodes, and the cavities of the composite wall, and a lattice steel reinforced concrete composite wall structure system is formed.

[0080] In the precast composite wall area, by setting the concealed column 101, the overall mechanical performance of the wall can be improved. The vertical steel bars 102 are used instead of the vertical steel bars of the traditional shear wall. In actual construction, the vertical steel bars 102 can be connected by welding seams, bolt connections, and bolt-welding hybrid connections, etc., avoiding various deficiencies in the connection of the steel bars of the traditional shear wall, and the on-site connection is more convenient; and the stiffness of the steel bars is much greater than that of the steel bars, and it can bear the construction stage load; the cross-sectional area of the steel bars is larger than that of the steel bars, and the overall bearing capacity of the wall is greater than that of the traditional shear wall. The lattice members are used instead of the horizontal distribution steel bars of the traditional shear wall. While being convenient for connection, their cross-sectional area is larger, and the horizontal shear resistance is greater than that of the traditional shear wall. Therefore, the present invention adopts a lattice framework, which has practicability and feasibility.

[0081] The nodes can be designed to have the same cast-in-place strength or slightly lower than the cast-in-place strength according to the design requirements, and the design requirements are flexible; the connection methods include welding seam connection, bolt connection, and bolt-welding hybrid connection, etc., avoiding various deficiencies in the connection of the steel bars of the traditional shear wall, and the on-site connection is more convenient; by design calculations, determine parameters such as the form, cross-sectional area, and spacing of the vertical steel bars to ensure the strength and stiffness of the steel bars, so that the nodes have relatively large strength and stiffness before the concrete is poured, and can bear the construction load, and compared with the traditional shear wall system, the formwork and supports can be reduced, and the construction efficiency can be improved.

[0082] The components not elaborated in this embodiment are all existing components that can be purchased through public channels.

[0083] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. Obviously, those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A lattice steel reinforced concrete composite wall, characterized in that, It includes two structural forms: double-sided lattice steel reinforced concrete composite wall and single-sided lattice steel reinforced concrete composite wall; The double-sided lattice steel reinforced concrete composite wall includes two precast steel reinforced concrete wall panels (10) that are overlapped, and concrete is poured into the cavity between the two precast steel reinforced concrete composite wall panels; The single-sided lattice steel reinforced concrete composite wall structure uses the retaining wall of the underground structure as one side of the composite panel, and the other side uses a precast steel reinforced concrete wall panel (10), and concrete is poured into the cavity between the retaining wall and the precast steel reinforced concrete wall panel (10); The precast steel reinforced concrete wall panel (10) includes: a steel skeleton and a concrete wall body (104); the steel skeleton includes: concealed columns (101), vertical steel members (102), and transverse bracings (103); the steel skeleton is hidden inside the concrete wall body (104); Concealed columns (101) are arranged at both ends of the precast steel reinforced concrete wall panel (10), and the concealed columns (101) are connected to the vertical steel members (102), and the vertical steel members (102) are connected to each other by transverse bracings (103) to form an integral steel skeleton. After pouring concrete on the integral steel skeleton, an exposed part (105) is formed on the end side, and the exposed part (105) is used for on-site connection.

2. The lattice steel reinforced concrete composite wall according to claim 1, wherein In the double-sided lattice steel reinforced concrete composite wall, shear keys are arranged on the inner sides of the two precast steel reinforced concrete wall panels (10); in the single-sided lattice steel reinforced concrete composite wall, shear keys are arranged on the precast steel reinforced concrete wall panel (10); the shear keys include: stud bolts, embedded steel bar heads, and profiled steels.

3. A lattice steel reinforced concrete composite wall according to claim 1, wherein The vertical steel members (102) include: rolled steel sections, welded steel sections, cold-formed steel sections, and cold-bent steel plates; the cross-sectional forms of the vertical steel members (102) include: angle steels, channel steels, I-beams, cruciform steels, L-shaped steels, and C-shaped steels.

4. A lattice steel reinforced concrete composite wall according to claim 1, characterized in that The transverse bracings (103) include: angle steel bracing bars, steel plate bracing plates, and steel bars.

5. A lattice steel reinforced concrete composite wall according to claim 1, characterized in that, The layout form of the transverse bracings (103) between the concealed columns (101) and the vertical steel members (102), and between the vertical steel members (102) is arranged longitudinally along the length of the wall, including being orthogonal and obliquely intersecting with the vertical steel members (102); the connection methods of the transverse bracings (103) include weld connection, bolt connection, and bolt-weld hybrid connection.

6. An assembled underground structural system applying a lattice steel reinforced concrete composite wall as described in any one of claims 1-5, characterized in that, It includes: a floor slab, a bottom beam, precast beams, precast columns, lattice steel reinforced concrete composite walls, floor slabs, precast roof slabs, and concrete cast-in-place layers; The lattice steel reinforced concrete composite wall is vertically connected at joints through lattice steel members, and horizontally connected at joints through lattice steel members on both sides to form a composite wall area; the vertical joint connection forms a vertical splicing joint, and the horizontal joint connection forms a horizontal splicing joint; the composite wall area is connected to the floor slab through wall panel connection joints.

7. An assembled underground structure system according to claim 6, characterized in that, The vertical splicing joint uses angle steel as the first connecting member to splice the upper and lower double-sided lattice steel reinforced concrete composite walls into one body, that is, the exposed parts (105) of the upper and lower double-sided lattice steel reinforced concrete composite walls are spliced through angle steel; the vertical splicing joint is poured with concrete.

8. The prefabricated underground structure system according to claim 6, characterized in that, The horizontal splicing joint is formed by splicing the exposed parts (105) of two adjacent lattice steel reinforced concrete composite walls on the left and right into one body.

9. The prefabricated underground structure system according to claim 6, characterized in that, Corbels are provided at the inner precast wall panels of the lattice steel reinforced concrete composite wall. The precast floor slab is placed on the corbels, and the extended reinforcement bars of the floor slab are inserted into the gap between the two precast wall panels. Finally, concrete is poured into the gap to achieve the anchoring connection. Alternatively, the precast floor slab is placed on the inner precast wall panel of the lattice steel reinforced concrete composite wall, and the extended reinforcement bars of the floor slab are inserted into the gap between the two precast wall panels. Finally, concrete is poured into the gap to achieve the anchoring connection.

10. The prefabricated underground structure system according to claim 6, characterized in that, The floor slab includes: steel truss floor decking, precast slab, composite slab, and cast-in-place reinforced concrete floor slab.

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