An SRC composite structure for lining a chamber reservoir and its construction method

Abstract

The present invention relates to an SRC composite structure for lining a chamber reservoir. An outer steel bar welded mesh, a steel section, and an inner steel bar welded mesh are located within the concrete structure layer, and a concrete protective layer is laid on the inner side of the concrete structure layer at the bottom. And its construction method, which includes constructing a BIM model of the SRC composite structure for virtual construction; batch prefabricating steel sections and steel bar meshes according to the BIM model and installing them on site according to construction simulation; casting the concrete structure layer on site and secondarily pouring the concrete protective layer. By setting up the steel bar mesh - steel section - steel bar mesh concrete composite structure to replace the traditional reinforced concrete structure, the present invention solves the major problem of the difficulty in one-time integral pouring of the reservoir structure in underground chamber engineering while meeting the requirements of waterproofing, impermeability, and durability of the chamber reservoir structure, realizes the construction process of factory prefabrication and on-site assembly, and has the advantages of high load-bearing stability, fast construction, and intelligent construction.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering design and construction, and particularly relates to an SRC composite structure for lining a chamber reservoir and a construction method thereof. Background Art

[0002] Tunnels and underground projects are important components in the construction of modern highways, railways, urban subways, hydropower projects, national defense projects, etc., and play an increasingly important role in the construction of modern comprehensive transportation systems and modern national defense projects. In recent years, green, efficient, and intelligent construction has become an important development trend in the construction of tunnels and underground projects in China.

[0003] In the field of underground engineering, chamber reservoirs are generally used for cavern projects with good lithology, and their lining structures mainly adopt the wall-attached reinforced concrete structure. The waterproof, impermeable, and durability design requirements of chamber reservoirs are relatively high, and in the construction process, it is often necessary to carry out integral pouring of the structure to meet its performance requirements. At the same time, traditional reinforced concrete structures require steel bar binding at the construction site. Through on-site investigations and theoretical analyses of the lining structures of chamber reservoirs in different construction stages such as in-service, renovation, and new construction, the following problems are found: (1) There is a problem of leakage and loss of stored water in the reservoir during the in-service stage; (2) Through on-site investigations of renovation projects, there are obvious cracks on the structural surface of reservoirs with a certain service life, and the occurrence locations are mainly concentrated at the bottom of the side walls, that is, the junction of the structural floor and the side walls; (3) The waterproof and impermeable properties of reservoirs with construction joints are extremely poor; (4) A large amount of on-site steel bar binding is used in new construction projects, which increases the on-site construction labor, materials, and construction period, and the construction quality is uneven, resulting in poor comprehensive economic efficiency; (5) Under the premise that construction joints are not allowed, it is extremely difficult to carry out integral pouring of the cast-in-place reinforced concrete structure, especially the integral pouring of the structural floor and the side walls. Summary of the Invention

[0004] In view of the technical problems existing in the prior art, the present invention provides an SRC composite structure for lining a chamber reservoir and a construction method thereof. By setting a steel bar mesh - steel section - steel bar mesh concrete composite structure to replace the traditional reinforced concrete structure, while meeting the requirements of anti-leakage and durability of the chamber reservoir structure, it solves the major problem of difficult integral pouring of the reservoir structure in underground cavern projects, realizes the construction process of factory prefabrication and on-site assembly, and has the advantages of convenient on-site construction, high efficiency, and economic environmental protection.

[0005] The technical solution adopted by the present invention is as follows: An SRC composite structure for the lining of a chamber reservoir, comprising an outer welded steel bar mesh, a section steel, an inner welded steel bar mesh, a concrete structure layer, and a concrete protective layer. The outer welded steel bar mesh, the section steel, and the inner welded steel bar mesh are located within the concrete structure layer. The section steel is sandwiched between the outer welded steel bar mesh and the inner welded steel bar mesh. A concrete protective layer is laid on the inner side of the concrete structure layer at the bottom.

[0006] Preferably, both the outer welded steel bar mesh and the inner welded steel bar mesh are prefabricated and welded mesh-shaped steel bar products in the factory, consisting of a plurality of longitudinal steel bars and transverse steel bars that are perpendicular to each other and arranged at a certain interval in sequence. The intersection points of the longitudinal steel bars and the transverse steel bars are formed by strong resistance pressure welding.

[0007] Preferably, the section steel is a strip-shaped steel with a certain cross-sectional shape and size, and also has the characteristics of being prefabricated in the factory and assembled on-site. The section steel includes a circular section steel frame, corner column section steel frames, end wall section steel, partition wall section steel, and bottom plate section steel. A plurality of circular section steel frames are arranged in sequence between two corner column section steel frames. The lower end of each corner column section steel frame and circular section steel frame is connected to a bottom plate section steel. The corner column section steel frame and the bottom plate section steel connected thereto form a frame structure. The end wall section steel is located within one of the frame structures, and the partition wall section steel is located within the other frame structure. The end wall section steel and the partition wall section steel are both connected to the bottom plate section steel. The circular section steel frame includes a straight wall and a circular arch section steel; the end wall section steel refers to the section steel provided at the end wall of the reservoir lining structure; the partition wall section steel refers to the section steel provided at the structural partition wall between the reservoir and the pump house.

[0008] Preferably, the circular section steel frame adopts I-beams, and the cross-sectional dimensions and spacing of the I-beams are determined according to the water level height of the reservoir. The corner column section steel frames adopt channel steels, and the cross-sectional dimensions of the channel steels are determined according to the water level height of the reservoir. The bottom plate section steel adopts H-beams. The cross-sectional dimensions of the H-beams are determined by calculation according to the load borne during construction, and the spacing of the H-beams corresponds to that of the circular section steel frames. The end wall adopts I-beams and is set to be proportionally scaled in a loop in sequence.

[0009] Preferably, the lower end of the partition wall section steel is connected to the bottom plate section steel, and the upper end is connected to a transverse connecting beam. The two ends of the transverse connecting beam are connected to the corner column section steel frames, and a masonry partition wall will be provided between the transverse connecting beam and the corner column section steel frames.

[0010] Preferably, the thickness of the concrete structure layer on the outer side of the outer welded steel bar mesh is 10 cm.

[0011] Preferably, the concrete structure layer adopts concrete with an impermeability grade of P12.

[0012] Preferably, the concrete cover is made of concrete with the same grade and impermeability grade as the concrete structural layer.

[0013] Preferably, the outer steel bar welded mesh, the profiled steel, and the inner steel bar welded mesh are all three-dimensionally designed by BIM technology and numbered respectively.

[0014] The technical solution adopted by the present invention is also: a construction method for an SRC composite structure for lining a cavern reservoir, which is characterized by including the following steps:

[0015] Step 1: Through BIM technology, conduct three-dimensional design of the SRC composite structure, construct a BIM model of the SRC composite structure, and then combine construction simulation and simulation technology to carry out virtual construction;

[0016] Step 2: Batch prefabricate the outer steel bar welded mesh, the profiled steel, and the inner steel bar welded mesh according to the BIM model, code them, and then transport them to the cavern site;

[0017] Step 3: Install the outer steel bar welded mesh on site according to the construction simulation;

[0018] Step 4: Install the profiled steel on site according to the construction simulation;

[0019] Step 5: Install the inner steel bar welded mesh on site according to the construction simulation;

[0020] Step 6: Cast the concrete structural layer on site, and the concrete structural layer does not completely cover the profiled steel on the bottom plate;

[0021] Step 7: Pour the concrete cover for the second time on the bottom plate on site, and the construction of the SRC composite structure for lining the cavern reservoir is completed.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The present invention adopts a combined structure of steel bar welded mesh - section steel - steel bar welded mesh as the support main body of the reservoir lining structure. Compared with the traditional lining structure cast in - situ with reinforced concrete, it has the following advantages: (1) The section steel and steel bar welded mesh structure can be prefabricated in advance, directly transported to the chamber construction site for on - site assembly. The section steel is arranged at a certain interval, making the on - site assembly of components more convenient, significantly improving the construction efficiency, and thus greatly reducing the construction labor cost and shortening the construction period; (2) By setting the bottom - plate section steel of the H - section steel, on the basis of providing lateral support for the circumferential section steel frame, it can also be used as the support condition for the cast - in - place concrete during construction, solving the problem of the difficulty of one - time integral pouring of the reservoir structure and having the characteristics of good waterproof and anti - seepage performance; (3) By adjusting the setting position of the steel bar welded mesh, ensuring that the steel bar welded mesh and the section steel have a certain concrete covering thickness, providing a reliable waterproof and anti - seepage protection effect, and thus improving the overall durability of the lining structure.

[0024] 2. The present invention sets the section steel frame and the combined structure of the inner and outer steel bar welded meshes in a proportionally scaled - down manner in sequence around the end wall to form a loop, and sets the section steel and the combined structure of the inner and outer steel bar welded meshes in the partition wall. And the section steel frame and the steel bar welded mesh have a certain concrete covering. The concrete anti - seepage grade is selected as P12. Then, the SRC combined structure not only has the characteristics of strong stability and large stiffness, but also has the performance of waterproof and anti - seepage.

[0025] 3. The present invention sets a secondary - poured concrete protective layer on the bottom plate as the protective layer of the bottom - plate section steel, making the bottom - plate structure of the SRC combined structure have good waterproof performance and high durability.

[0026] 4. The present invention uses BIM technology to three - dimensionally design the SRC combined structure, synchronously providing data information for batch production in the factory. Then, combined with the construction simulation and emulation technology, virtual construction is carried out, providing a technical basis and conditions for intelligent construction, and thus achieving the goal of intelligent construction of the cavern project.

[0027] 5. The present invention has the advantages of waterproof, anti - seepage, durability, high load - bearing stability, fast construction, green environmental protection, and intelligent construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the structural plan view of the present invention;

[0029] Figure 2 is the standard cross - sectional view of the structure of the present invention;

[0030] Figure 3 is the overall BIM model view of the present invention;

[0031] Figure 4 is the cross - sectional view of the end - wall structure of the present invention;

[0032] Figure 5 Cross-sectional view of the reservoir partition wall structure of the present invention;

[0033] Figure 6 Three-dimensional design schematic diagram of the welded wire mesh of the outer steel bars of the cladding structure of the present invention;

[0034] Figure 7 Three-dimensional design schematic diagram of the steel structure of the present invention;

[0035] Figure 8 Three-dimensional design schematic diagram of the steel structure of the present invention from another angle;

[0036] Figure 9 Three-dimensional design schematic diagram of the welded wire mesh of the inner steel bars of the cladding structure of the present invention.

[0037] Label description: 1. Welded wire mesh of outer steel bars; 21. Ring-shaped steel frame; 22. Corner column steel frame; 23. End wall steel; 24. Partition wall steel; 25. Bottom plate steel; 26. Transverse connection beam; 3. Welded wire mesh of inner steel bars; 4. Reservoir partition wall; 5. Reservoir end wall; 6. Concrete protective layer; 7. Concrete structure layer; 8. Masonry partition wall. Detailed implementation manners

[0038] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment 1

[0040] The embodiment of the present invention provides an SRC composite structure for the lining of a cavern reservoir, as Figures 1-9 shown, which includes a welded wire mesh of outer steel bars 1, steel shapes, a welded wire mesh of inner steel bars 3, a concrete structure layer 7, and a concrete protective layer 6. The welded wire mesh of outer steel bars 1, steel shapes, and welded wire mesh of inner steel bars 3 are located within the concrete structure layer 7, and the steel shapes are sandwiched between the welded wire mesh of outer steel bars 1 and the welded wire mesh of inner steel bars 3. A concrete protective layer 6 is laid on the inner side of the concrete structure layer 7 at the bottom. The welded wire mesh of outer steel bars 1 and the welded wire mesh of inner steel bars 3 are both prefabricated and welded mesh-shaped steel bar products in the factory, with a plurality of longitudinal steel bars and transverse steel bars perpendicular to each other arranged at a certain interval in sequence, and the intersection points of the longitudinal steel bars and the transverse steel bars are all formed by strong resistance pressure welding.

[0041] The profiled steel includes an annular profiled steel frame 21, corner column profiled steel frames 22, end wall profiled steel 23, partition wall profiled steel 24, and bottom plate profiled steel 25. A plurality of annular profiled steel frames 21 are arranged in sequence between two corner column profiled steel frames 22. The lower ends of each corner column profiled steel frame 22 and annular profiled steel frame 21 are each connected to a bottom plate profiled steel 25. The corner column profiled steel frame 22 and the bottom plate profiled steel 25 connected thereto form a frame structure. The end wall profiled steel 23 is located within one of the frame structures, and the partition wall profiled steel 24 is located within the other frame structure. The end wall profiled steel 23 and the partition wall profiled steel 24 are both connected to the bottom plate profiled steel 25. The end wall profiled steel 23 refers to the profiled steel provided at the end wall of the reservoir lining structure; the partition wall profiled steel 24 refers to the profiled steel provided at the structural partition between the reservoir and the pump house. The concrete structure layer 7 is made of concrete with an impermeability grade of P12. The concrete protective layer 6 is made of concrete with the same grade and impermeability grade as the concrete structure layer 7.

[0042] Specifically, in this embodiment, the annular profiled steel frame 21 is composed of a straight wall section and a circular arch section profiled steel, forming an annular steel frame structure. Among them, the profiled steel structure member is a strip-shaped steel with a certain interface shape and size, and also has the characteristics of factory prefabrication and on-site assembly, realizing rapid installation and prefabricated construction, reducing the workload of a large number of steel frame bindings on-site, and avoiding the problems of difficult on-site binding construction of a large number of dense steel frames and uneven construction quality, and having the advantages of high comprehensive economic benefits and environmental protection.

[0043] In this embodiment, the outer steel bar welded mesh 1 and the inner steel bar welded mesh 3 are provided with a certain concrete covering thickness. Among them. In the present invention, the inner steel bar welded mesh 3 is provided inside the profiled steel. The inner steel bar welded mesh 3 has a relatively dense steel bar spacing. The longitudinal steel bars and the transverse steel bars form a mesh structure to jointly play a role of bonding and anchoring, which is beneficial to preventing the generation and development of concrete cracks. The structure composed of the profiled steel and the steel bar welded mesh forms a structure with good overall stability and internal bonding force with the cast-in-place concrete. At the same time, due to the selection of concrete with an impermeability grade of P12, the overall impermeability performance of the SRC composite structure is improved. In addition, by adjusting the structural position of the steel bar welded mesh and reserving a certain concrete covering thickness, the protection effect on the steel bar welded mesh and the profiled steel structure is realized, and the waterproof and durability performance of the SRC structure is improved.

[0044] In this embodiment 1, the reservoir end wall 5 is closely arranged against the initial support and the rock. After the reservoir structure is built, it plays a role in bearing the force of the end structure. The reservoir partition wall 4 is arranged on one side of the adjacent pump house and is used for connecting the inlet and outlet pipes of the pump equipment and for maintenance. Generally speaking, it is more appropriate for the height of the reservoir partition wall 4 of the SRC composite structure to be 30 cm above the water level line or at the arching position.

[0045] Embodiment 2

[0046] An embodiment of the present invention provides an SRC composite structure for lining a chamber reservoir, as Figure 2 shown. The difference from Embodiment 1 is that the bottom plate steel section 25 is selected as an H-shaped steel. The H-shaped steel takes into account the supporting effect of cast-in-place concrete during construction. After the construction of the SRC composite structure is completed, a concrete protective layer 6 is poured as the protective layer of the bottom plate steel section 25, so that the bottom plate structure of the SRC composite structure has good waterproof performance and high durability.

[0047] Embodiment 3

[0048] An embodiment of the present invention provides an SRC composite structure for lining a chamber reservoir, as Figure 3 shown. The SRC composite structure is subjected to standardized and modular three-dimensional design through BIM technology, a BIM model of the SRC composite structure is constructed, and detailed three-dimensional component dimensions and information are provided for factory prefabrication production. At the same time, the three-dimensional design results are used for on-site technical disclosure and construction guidance to realize the information circulation and transmission of installation components, and thus realize intelligent construction technology.

[0049] Embodiment 4

[0050] An embodiment of the present invention provides an SRC composite structure for lining a chamber reservoir, as Figure 4 shown. On the basis of Embodiment 1 or 2, the reservoir end wall 5 includes an outer steel bar welded mesh 1, a lined steel structure layer, an inner steel bar welded mesh 3, and a concrete structure layer 7. Among them, the lined steel structure layer is composed of corner column steel frames 22, end wall steel sections 23, and bottom plate steel sections 25 to form an end wall force-bearing structure system.

[0051] Specifically, in this embodiment, the end wall steel section 23 is selected as an I-shaped steel, and the corner column steel frame 22 is selected as a channel steel. The section dimensions of the steel sections are determined according to calculations. The end wall steel sections 23 are arranged in a ring and scaled proportionally in sequence, and the scaling distance is determined according to calculations.

[0052] Embodiment 5

[0053] An embodiment of the present invention provides an SRC composite structure for lining a chamber reservoir, as Figure 5As shown, on the basis of Embodiment 1 or 2 or 4, the reservoir partition wall 4 is divided into a lower SRC composite structure wall and an upper masonry partition wall 8. The masonry partition wall 8 is mainly used for maintenance, and can also be used as a temporary transportation opening for removing and discarding the formwork inside the reservoir structure. The lower SRC composite structure wall is mainly used to bear the water pressure of the reservoir. By setting the inner welded wire mesh 3, partition steel section 24, outer welded wire mesh 1, bottom plate steel section 25 and transverse connecting beam 26, the section size of the steel section is determined according to the water level height to meet the requirements of structural stability. The lower end of the partition steel section 24 is connected to the bottom plate steel section 25, and the upper end is connected to the transverse connecting beam 26. Both ends of the transverse connecting beam 26 are connected to the corner column steel frame 22. The partition steel section 24 and the bottom plate steel section 25 are sandwiched between the inner welded wire mesh 3 and the outer welded wire mesh 1.

[0054] Embodiment 6

[0055] An embodiment of the present invention provides an SRC composite structure for lining a chamber reservoir, as Figure 6 shown. Through BIM technology, a three-dimensional design of the outer welded wire mesh 1 is carried out, and the outer welded wire mesh 1 is further divided into blocks to meet the requirements of standardized and modular factory production and construction installation process flow, provide detailed dimensions and information of three-dimensional components for factory prefabrication production, and at the same time, the three-dimensional design results are used for on-site technical disclosure and construction guidance to realize the information circulation and transfer of installation components, and then realize intelligent construction technology. Figure 6 The outer welded wire mesh 1 located outside the reservoir partition wall 4 and the reservoir end wall 5 is not drawn in the figure.

[0056] Embodiment 7

[0057] An embodiment of the present invention provides an SRC composite structure for lining a chamber reservoir, as Figures 7-8 shown. Through BIM technology, a three-dimensional design of the steel structure is carried out. The steel sections include an annular steel frame 21, a corner column steel frame 22, an end wall steel section 23, a partition steel section 24, a bottom plate steel section 25 and a transverse connecting beam 26. The steel sections are numbered separately, and unified management of the components is carried out. Coding management is carried out for component prefabrication production and on-site assembly construction to achieve one number or one ID for one component, so as to meet the goals of standardized, modular and refined construction.

[0058] Embodiment 8

[0059] An embodiment of the present invention provides an SRC composite structure for lining a chamber reservoir, as Figure 9 shown. The difference from Embodiment 6 is that the inner welded wire mesh 3 is arranged inside the steel section, and the outside is covered with a certain thickness of concrete. Similarly, through BIM technology, a three-dimensional design of the steel structure is carried out. Figure 9Similarly, the welded steel bar mesh 3 located outside the reservoir partition wall 4 and the reservoir end wall 5 is not drawn either.

[0060] Embodiment 9

[0061] An embodiment of the present invention provides a construction method for an SRC composite structure for lining a cavern reservoir, including the following steps:

[0062] Step 1, through BIM technology, perform three-dimensional design of the SRC composite structure, construct a BIM model of the SRC composite structure, and then combine construction simulation and simulation technology to perform virtual construction.

[0063] Specifically, in this embodiment, a straight-wall circular-arch cavern reservoir is taken as an example. Through three-dimensional design software, three-dimensional modeling of the welded steel bar mesh, steel structure, concrete structure arch roof, concrete structure bottom plate, concrete structure side wall, concrete end wall and partition wall is carried out. Further, according to the factory prefabrication and on-site installation process flows, component block division and coding management are carried out. Further, simulation software is used for virtual construction to realize guiding prefabrication production and on-site assembly construction with the three-dimensional design results.

[0064] Step 2, batch prefabricate the outer welded steel bar mesh 1, circular steel frames 21, corner column steel frames 22, end wall steel 23, partition wall steel 24, bottom plate steel 25, transverse connection beams 26 and inner welded steel bar mesh 3 according to the BIM model. Carry out block prefabrication production according to the on-site transportation conditions, and carry out coding management according to the BIM three-dimensional design results. And finished product protection should be carried out during the transportation process.

[0065] Step 3, install the outer welded steel bar mesh 1 on-site according to the construction simulation. The construction simulation refers to carrying out construction simulation of the constructed outer welded steel bar mesh 1 through BIM software, which is to carry out virtual construction through technical means, and VR technology can also be combined to enhance the augmented reality function and improve the on-site construction technology efficiency and quality.

[0066] Step 4, install the steel on-site according to the construction simulation. Similarly, carry out construction simulation of the constructed steel structure through BIM software. On the basis of the installed outer welded steel bar mesh, determine the construction process flow in advance and plan a reasonable construction sequence to improve the on-site construction efficiency and quality.

[0067] Step 5, install the inner welded steel bar mesh 3 on-site according to the construction simulation. Similarly, carry out construction simulation of the constructed inner welded steel bar mesh 3 through BIM software. On the basis of the in-place installation of the outer welded steel bar mesh 1 and the steel, further determine the construction process flow and construction space planning of the inner welded steel bar mesh 3.

[0068] Step 6: Cast the in-situ cast-in-place concrete structural layer 7. The concrete structural layer 7 is made of concrete with an impermeability level of P12, and it is required that the lining wall, partition wall, end wall, and floor slab be integrally cast at one time on site. The concrete structural layer 7 does not completely cover the base plate section steel 25. Therefore, the temporary formwork for concrete casting uses the base plate section steel 25 as a temporary support structure.

[0069] Step 7: Cast the concrete protective layer 6 on site. The selected concrete structural protective layer uses the same grade and the same impermeability grade concrete as the concrete structural layer 7, and the thickness is not less than 10 cm. Construction is carried out after the concrete structural layer 7 is constructed and meets a certain strength and the formwork is removed. Thus, the construction of the SRC composite structure for the lining of the cavern reservoir is completed.

[0070] The above has described the present invention in detail through embodiments, but the content described is only an exemplary embodiment of the present invention and cannot be considered as defining the scope of implementation of the present invention. The protection scope of the present invention is defined by the claims. All those who use the technical solutions described in the present invention, or those skilled in the art, inspired by the technical solutions of the present invention, within the essence and protection scope of the present invention, design similar technical solutions to achieve the above technical effects, or make equal changes and improvements to the scope of the application, etc., should still fall within the scope of patent coverage protection of the present invention.

Claims

1. An SRC composite structure for lining a chamber reservoir, characterized in that, It includes an outer steel bar welded mesh, section steel, an inner steel bar welded mesh, a concrete structure layer and a concrete protective layer. The outer steel bar welded mesh, section steel and inner steel bar welded mesh are located within the concrete structure layer. The section steel is sandwiched between the outer steel bar welded mesh and the inner steel bar welded mesh. A concrete protective layer is laid on the inner side of the concrete structure layer at the bottom; Both the outer steel bar welded mesh and the inner steel bar welded mesh are mesh-shaped steel bar products, which are formed by arranging multiple longitudinal steel bars and transverse steel bars that are perpendicular to each other in sequence. The intersection points of the longitudinal steel bars and the transverse steel bars are formed by strong resistance pressure welding; The section steel includes a circular section steel frame, corner column section steel frames, end wall section steel, partition wall section steel and bottom plate section steel. A plurality of circular section steel frames are arranged in sequence between two corner column section steel frames. The lower ends of each corner column section steel frame and circular section steel frame are connected to a bottom plate section steel. The corner column section steel frame and the bottom plate section steel connected thereto form a frame structure. The end wall section steel is located within one of the frame structures, and the partition wall section steel is located within the other frame structure. The end wall section steel and the partition wall section steel are both connected to the bottom plate section steel; The circular section steel frame uses I-beam, the corner column section steel frame uses channel steel, and the bottom plate section steel uses H-beam; The lower end of the partition wall section steel is connected to the bottom plate section steel, and the upper end is connected to a transverse connection beam. The two ends of the transverse connection beam are connected to the corner column section steel frames. Masonry partition walls are provided on the transverse connection beam and the corner column section steel frames.

2. The SRC composite structure for lining of a chamber reservoir as claimed in claim 1, wherein, The thickness of the concrete structure layer on the outside of the outer steel bar welded mesh is 10 cm.

3. The SRC composite structure for the lining of a chamber reservoir as claimed in claim 1, wherein The concrete structure layer uses concrete with an impermeability grade of P12.

4. The SRC composite structure for lining of cavern reservoirs according to claim 3, wherein The concrete protective layer uses concrete with the same grade and impermeability grade as the concrete structure layer.

5. The SRC composite structure for the lining of a chamber reservoir as described in any one of claims 1-4, characterized in that The outer steel bar welded mesh, section steel and inner steel bar welded mesh are all three-dimensionally designed through BIM technology and numbered separately.

6. A construction method for an SRC composite structure for lining a chamber reservoir according to any one of claims 1-5, characterized in that, It includes the following steps: Step 1, through BIM technology, conduct three-dimensional design of the SRC composite structure, construct a BIM model of the SRC composite structure, and then combine with construction simulation and simulation technology to conduct virtual construction; Step 2, batch prefabricate the outer steel bar welded mesh, section steel and inner steel bar welded mesh according to the BIM model, and conduct coding, and then transport them to the chamber site; Step 3, install the outer steel bar welded mesh on site according to the construction simulation; Step 4, install the section steel on site according to the construction simulation; Step 5, install the inner steel bar welded mesh on site according to the construction simulation; Step 6, cast the concrete structure layer on site. The concrete structure layer does not completely cover the section steel located on the bottom plate; Step 7, pour the concrete protective layer on the bottom plate on site for the second time, and the construction of the SRC composite structure for the lining of the chamber reservoir is completed.

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