Combined underground diaphragm wall and construction method thereof
By adopting a combined structure of L-shaped guide wall, steel insert plate and sub-shaped reinforcement in the underground continuous wall construction, the problems of low construction efficiency and insufficient connection rigidity are solved, and higher load-bearing capacity and durability are achieved, which improves the Bending, shear and waterproof properties.
Patent Information
- Application Number
- CN202411528734.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2024-12-17
AI Technical Summary
During the construction process of existing underground continuous walls, the construction efficiency is low and the connection between H-shaped steel piles and concrete walls is insufficient, which affects the load-bearing capacity of the overall structure.
Using a combined underground continuous wall structure, including L-shaped guide wall, steel insert plate and sub-shaped reinforcement, the precise placement of steel insert plates and uniform distribution of reinforcements is ensured by positioning guide grooves and guide grooves, and welding connections are used to enhance the wall's body. Stability and compressive resistance, and force transmission and dispersion are achieved through the design of the columnar reinforcement cylinder, improving pull-off resistance.
It improves construction efficiency, enhances the load-bearing capacity and durability of the wall, improves the bending, shearing and waterproof performance of the overall structure, and ensures the stability and deformation resistance of the structure.
Smart Images
Figure CN119145400A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of continuous wall construction, and in particular to a combined underground continuous wall and a construction method thereof. Background Art
[0002] The underground continuous wall is a basic engineering technology. Its construction process is as follows: First, a trenching machine is used to dig a long and narrow deep trench along the peripheral axis of the deep excavation project under the condition of mud wall protection. After the trench is cleared, the steel cage is hoisted into the trench, and then underwater concrete is poured through the conduit method to form a unit trench section. The construction process is carried out section by section, and finally a continuous reinforced concrete wall is constructed underground, which plays multiple roles of water interception, anti-seepage, load bearing and water retaining.
[0003] For related technologies, reference may be made to the Chinese patent with authorization announcement number CN113026723A, which discloses an underground continuous wall special-shaped ribbed composite water-stopping structure, including multilateral pipe piles, with ribs symmetrically arranged on both sides of the multilateral pipe piles about the center seam; H-shaped steel is arranged in the cavity surrounded by the multilateral pipe piles; fine stone concrete is filled in the cavity surrounded by the polygonal pipe piles and between the H-shaped steel; there are at least three ribs on both sides of the center seam of the polygonal pipe piles; the polygonal pipe piles are connected to the H-shaped steel piles, and the H-shaped steel piles are arranged on the side of the groundwater seepage layer. The construction method is: a) build the guide wall; b) groove the underground continuous wall on one side of the joint; c) remove the silt and residue at the bottom of the groove; d) hang the joint pipe; e) drive H-shaped steel piles; f) drive special-shaped multilateral pipe piles; g) clean the bottom of the groove for the second time; h) hang the steel cage; i) lower the guide pipe; j) drive H-shaped steel piles and pour concrete; k) groove the underground continuous wall on the other side of the joint; m) pull out the joint pipe; n) cycle. The above scheme improves the safety factor and water-stopping strength.
[0004] In the existing underground continuous wall construction process, the an construction steps used are complex, resulting in reduced construction efficiency. In addition, the current method of "driving H-shaped steel piles and pouring concrete" makes the connection between the H-shaped steel piles and the concrete wall insufficiently rigid; this deficiency causes poor coordination between the wall and the piles under load, thereby affecting the bearing capacity of the overall structure. In order to solve the above technical problems, this paper proposes a combined underground continuous wall and its construction method. Summary of the invention
[0005] The present application provides a combined underground continuous wall and a construction method thereof, which improves construction efficiency while enhancing the bearing capacity and durability of the wall.
[0006] The present application provides a combined underground continuous wall and a construction method thereof, which adopts the following technical solutions: A combined underground continuous wall and a construction method thereof, the combined underground continuous wall comprising two L-shaped guide walls, a positioning guide groove being formed between the two L-shaped guide walls, a positioning groove being provided on the inner surface of the L-shaped guide wall, a steel plug plate being provided in the positioning groove of the L-shaped guide wall, a guide groove being provided on the inner surface of the steel plug plate, the two oppositely arranged steel plug plates being fixedly connected by sub-special-shaped reinforcement members, a plurality of sub-special-shaped reinforcement members being provided from top to bottom along the long side direction of the guide groove of the steel plug plate, and being welded between adjacent upper and lower sub-special-shaped reinforcement members, and a plurality of the sub-special-shaped reinforcement members forming a sub-reinforcement structure.
[0007] By adopting the above technical solution, the positioning guide groove formed between the two L-shaped guide walls ensures the accurate placement of the steel plug plate, thereby improving the overall positioning accuracy and strength of the wall; and the design of the guide groove on the inner surface of the steel plug plate and the sub-special-shaped reinforcement member makes the sub-special-shaped reinforcement member evenly distributed along the guide groove, and is connected by welding, thereby achieving stability and compressive strength enhancement of the wall; this structural design not only improves the construction efficiency, but also enhances the bearing capacity and durability of the wall.
[0008] Preferably, the sub-special-shaped reinforcement member comprises a columnar reinforcement tube, and a through hole is provided inside the columnar reinforcement tube.
[0009] By adopting the above technical solution, the columnar reinforcement tube in the sub-shaped reinforcement member realizes effective transmission and dispersion of force through the internal through-hole design; at the same time, the shape of the columnar reinforcement tube helps to resist lateral pressure and improve the pull-out resistance of the wall.
[0010] Preferably, the outer surface of the columnar reinforcement tube is provided with a first cantilever bar and a second cantilever bar, and the first cantilever bar and the second cantilever bar are respectively matched with two guide grooves oppositely arranged in the steel insert plate, and the first cantilever bar and the second cantilever bar are respectively aligned and slide in the two guide grooves oppositely arranged in the steel insert plate.
[0011] By adopting the above technical solution, the first and second outriggers of the columnar reinforcement tube are designed to be docked with the guide groove of the steel insert plate, thereby achieving smooth sliding and precise alignment; this matching relationship enhances the connection stability between the columnar reinforcement tube and the steel insert plate, so that the overall structure can effectively disperse the pressure when subjected to stress, thereby improving the bending and shear resistance of the wall.
[0012] Preferably, a first water retaining portion is formed at a corner between the first overhanging bar and the columnar reinforcement tube, and a second water retaining portion is formed at a corner between the second overhanging bar and the columnar reinforcement tube.
[0013] By adopting the above technical solution, the design of the first water retaining part and the second water retaining part can effectively guide and block the water flow by forming a concave at the corner, preventing water from entering the interior of the columnar reinforcement tube; this structure helps to improve the waterproof performance of the underground continuous wall, extend its service life, and reduce the erosion and impact of water on the foundation.
[0014] Preferably, the first outriggers and the second outriggers are both provided with first ribs, the second ribs are provided at the ends of the first ribs, and an obtuse angle is formed between the first ribs and the second ribs.
[0015] By adopting the above technical solution, the obtuse angle formed between the first rib and the second rib can effectively enhance the bending stiffness and stability of the structure, enhance the deformation resistance of the wall when subjected to stress, and ensure long-term stability.
[0016] Preferably, one end of the second rib is fixedly connected to the first rib, and the other end of the second rib is provided with an end plate, and an acute angle is formed between the end plate and the second rib.
[0017] By adopting the above technical solution, the acute angle design formed between the second rib and the end plate helps to improve the local stiffness and strength of the structure; such a structure can effectively resist shear force, and the connection with the first rib increases the overall stability, ensuring good bearing capacity and anti-deformation performance under load.
[0018] Preferably, a plurality of corrugated plates are provided on the inner surface of the first rib plate, and an insertion limit groove is formed between two adjacent corrugated plates.
[0019] By adopting the above technical solution, the arrangement of the corrugated plate can increase the rigidity and strength of the first rib plate, thereby improving the bearing capacity of the entire structure.
[0020] Preferably, it also includes a mother reinforcement structure matching the sub-reinforcement structure, wherein a plurality of mother reinforcement structures are arranged along the long side direction of the positioning guide groove, and the plurality of mother reinforcement structures and sub-reinforcement structures are arranged alternately, and the mother reinforcement structure and the sub-reinforcement structure are the same structure.
[0021] By adopting the above technical solution, the parent reinforcement structure and the child reinforcement structure are arranged alternately, and precise alignment is ensured by positioning guide grooves, thereby optimizing the force transmission efficiency; this design enhances the stability and uniformity of the overall reinforcement system and improves its anti-deformation ability.
[0022] Preferably, the construction method of the combined underground continuous wall comprises the following construction steps: S1: trough preparation; Before the project starts, transport vehicles, excavators, truck cranes, trenching machines, crawler cranes and other equipment and construction personnel enter the site; S2: Make an L-shaped guide wall; The total station is used for layout, and the trench is excavated at the layout point. The formwork is supported and concrete is poured in sequence. After curing, two L-shaped guide walls are symmetrically formed inside the trench. S3: forming a positioning guide groove; The hydraulic grab method is used in combination with a slot forming machine to form a positioning guide slot between two L-shaped guide walls; S4: forming a guide groove; According to the design, along the long side direction of the L-shaped guide wall, a vertical downward guide groove is cut on the inner surface of the L-shaped guide wall by a slotting machine; S5: Clean the positioning guide groove; After the excavation of the positioning guide groove is completed, use a grab bucket to clean the bottom of the groove, and then use a wall brush to brush the wall, and repeat up and down several times until there is no mud on the wall brush; S6: Install the sub-reinforcement structure; Use the lifting equipment to align the steel plug plate with the guide groove on the L-shaped guide wall, and insert the steel plug plate into the guide groove on the L-shaped guide wall with the help of the piling equipment, then align the first and second extension bars on the sub-shaped reinforcement member respectively and slide them into the two guide grooves oppositely arranged on the steel plug plate, install the sub-shaped reinforcement members in sequence from top to bottom, and form a sub-reinforcement structure by welding the two upper and lower adjacent sub-shaped reinforcement members; S7: Install the parent reinforcement structure; According to the installation method described in S6, the mother reinforcement structure is installed so that the mother reinforcement structure is adjacent to the sub-reinforcement structure and is interlocked; S8: Install the steel cage; Use the lifting equipment to move the steel cage from below to the installation channel formed between the main reinforcement structure and the sub-reinforcement structure; S9: pouring concrete; Concrete is poured into the positioning guide groove using the conduit method, and a watertight test is carried out before pouring; S10: forming an underground continuous wall; When the concrete strength reaches 70% or the concrete is cured for 2 weeks, the underground continuous wall is obtained.
[0023] By adopting the above technical scheme, based on step-by-step advancement and meticulous operation; first, through trenching preparation and guide wall production, ensure the accuracy of construction foundation and positioning; then, use hydraulic grab and trenching machine to form positioning guide groove and guide groove to provide guidance for the installation of steel plug plates; then, install sub-reinforcement structure and parent reinforcement structure to enhance the stability of the wall; finally, position the steel cage and pour concrete to form a continuous wall to ensure the integrity and bearing capacity of the structure; the whole process emphasizes precision and mutual coordination to ensure construction quality and safety.
[0024] Preferably, in S7, the end plates on the mother reinforcement structure and the insertion limit grooves on the sub-reinforcement structures are inserted and engaged with each other, and a plurality of sub-reinforcement structures and the mother reinforcement structure are engaged with each other to form a stable water-stopping structure.
[0025] By adopting the above technical solution, the end plate of the mother reinforcement structure and the insertion limit groove of the sub-reinforcement structure interlock with each other to form a stable connection; this interlocking design effectively prevents water infiltration, ensures the water-stopping effect, enhances the stability and sealing of the entire structure, and prevents the occurrence of leakage problems.
[0026] In summary, this application has the following beneficial effects: 1. The combined underground continuous wall ensures the accurate placement of the steel plug plate through the positioning guide groove formed between the two L-shaped guide walls, thereby improving the overall positioning accuracy and strength of the wall; and the design of the guide groove on the inner surface of the steel plug plate and the sub-shaped reinforcement member makes the sub-shaped reinforcement member evenly distributed along the guide groove, and is connected by welding to achieve stability and compression resistance of the wall; this structural design not only improves the construction efficiency, but also enhances the bearing capacity and durability of the wall.
[0027] 2. The construction method of this combined underground continuous wall is based on step-by-step advancement and meticulous operation. First, through trenching preparation and guide wall production, the foundation and positioning of the construction are ensured to be accurate. Then, a hydraulic grab and trenching machine are used to form positioning guide grooves and guide grooves to provide guidance for the installation of steel plug plates. Then, the sub-reinforcement structure and the parent reinforcement structure are installed to enhance the stability of the wall. Finally, the steel cage is positioned and concrete is poured to form a continuous wall to ensure the integrity and bearing capacity of the structure. The whole process emphasizes precision and mutual coordination to ensure construction quality and safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 is a schematic diagram of the overall connection structure between the L-shaped guide wall and the steel plug plate in this embodiment; Figure 2 Schematic diagram of the internal structure of the sub-shaped reinforcement member in this embodiment; Figure 3 Schematic diagram of the connection structure between the sub-shaped reinforcement member and the main shaped reinforcement member in this embodiment; Figure 4 Schematic diagram of the connection structure between the end plate of the female special-shaped reinforcement member and the insertion limit groove of the female special-shaped reinforcement member in this embodiment; Figure 5 This is a schematic diagram of the overall structure of the embodiment in which the sub-shaped reinforcement member and the main-shaped reinforcement member are in a close state; Figure 6 Schematic diagram of the overall structure of the combined underground continuous wall in this embodiment; Figure 7 It is a schematic diagram of the overall structure of the steel cage in this embodiment; Explanation of the reference numerals in the accompanying drawings: 1. L-shaped guide wall; 2. Positioning groove; 3. Steel plug plate; 4. Guide groove; 5. Sub-special-shaped reinforcement member; 501. Columnar reinforcement tube; 502. Through hole; 503. First extension bar; 504. Second extension bar; 505. First water retaining part; 506. Second water retaining part; 507. First rib; 508. Second rib; 509. End plate; 5010. Corrugated plate; 5011. Insertion limit groove; 6. Mother special-shaped reinforcement member; 7. Mother reinforcement structure; 8. Sub-reinforcement structure; 9. Water-stop structure; 10. Steel cage. DETAILED DESCRIPTION
[0029] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content. Example
[0030] The present invention discloses a combined underground continuous wall and a construction method thereof. Figure 1 As shown, the combined underground continuous wall includes an L-shaped guide wall 1. The setting of the L-shaped guide wall 1 can effectively guide and locate the construction position of the underground continuous wall; two L-shaped guide walls 1 are provided, and a positioning guide groove is formed between the two L-shaped guide walls 1. The positioning guide groove formed between the two guide walls provides basic support for the verticality and horizontality of the wall; through the guidance of the guide groove, the accurate positioning of the underground continuous wall during construction is ensured, and the quality problems caused by construction deviations are reduced; the L-shaped shape can provide a better force transmission path for the underground wall, and enhance the stability and bearing capacity of the structure.
[0031] like Figure 1 As shown, the inner surface of the L-shaped guide wall 1 is provided with positioning grooves 2, and the positioning grooves 2 are evenly spaced along the long side direction of the L-shaped guide wall 1. Steel insert plates 3 are inserted from top to bottom in the positioning grooves 2 of the L-shaped guide wall 1. The establishment of the positioning grooves 2 can provide a precise installation position for the steel insert plates 3; the placement of the steel insert plates 3 in the positioning grooves 2 can play a role in auxiliary positioning and stabilization, ensuring the consistency and accuracy of the entire structure; and the steel insert plates 3 form good contact with the guide wall through the positioning grooves 2, thereby effectively transmitting external loads; thereby improving the memory and bearing capacity of the guide wall, ensuring that good structural strength is maintained during construction and use, and enhancing the overall bearing capacity of the structure.
[0032] like Figure 1 and Figure 2As shown, the inner surface of the steel plug plate 3 is provided with a guide groove 4, and the two oppositely arranged steel plug plates 3 are fixedly connected by a sub-special-shaped reinforcement member 5, and the sub-special-shaped reinforcement member 5 is slidably inserted in the inside of the guide groove 4, and is supported by the sub-special-shaped reinforcement member 5 to reinforce the two oppositely arranged steel plug plates 3; the existence of the guide groove 4 enables the sub-special-shaped reinforcement member 5 to accurately slide along the predetermined trajectory during installation to ensure the accuracy of its position; this can avoid the deviation of the sub-special-shaped reinforcement member 5 during the installation process and ensure the stability of the connection; the sub-special-shaped reinforcement member 5 is tightly combined with the steel plug plate 3 through the guide groove 4 to form an integral structure; when loading, the force between the various components can be effectively transmitted, thereby improving the strength and stability of the overall structure; through the support of the sub-special-shaped reinforcement member 5, a solid connection is formed between the two steel plug plates 3, which improves the overall structure of the underground continuous wall in terms of load-bearing and tensile performance, and enhances the seismic resistance and bending strength.
[0033] like Figure 2 As shown, several sub-shaped reinforcement members 5 are arranged from top to bottom along the long side direction of the guide groove 4 of the steel plug plate 3. The distribution of multiple sub-shaped reinforcement members 5 can enhance the connection strength between the steel plug plates 3 and reduce the risk of overall structural performance degradation due to failure of a single reinforcement member; the sub-shaped reinforcement members 5 are arranged along the long side direction of the guide groove 4 to ensure stability in the long direction and avoid structural deformation due to offset or uneven force; and the upper and lower adjacent sub-shaped reinforcement members 5 are welded and arranged, and several sub-shaped reinforcement members 5 form a stable sub-reinforcement structure 8; the welding between the sub-shaped reinforcement members 5 can form a continuous and rigid sub-reinforcement structure 8, which enhances the stiffness and stability of the entire system under force; through welding, a more fixed connection is formed between the two sub-shaped reinforcement members 5, which improves the ability to resist shear force, thereby improving the resistance of the entire structure to lateral overturning force or shear force.
[0034] like Figure 2 As shown, specifically, the sub-special-shaped reinforcement member 5 includes a columnar reinforcement tube 501, and a through hole 502 with a circular cross-section is provided at the inner center position of the columnar reinforcement tube 501. By providing the through hole 502 at the center position of the columnar reinforcement tube 501, the use of materials can be reduced, thereby reducing the dead weight of the entire reinforcement member, and facilitating installation and transportation; the through hole 502 provides a continuous drainage channel, allowing moisture to flow through the inside of the columnar reinforcement tube 501, thereby playing a role in drainage; this design can effectively guide the accumulated water to flow out and prevent moisture from accumulating inside the structure; the through hole 502 with a circular cross-section helps to reduce the resistance of the water flow, allowing the water to flow more smoothly when passing through, reducing the water pressure damage caused by water flow obstruction.
[0035] like Figure 2As shown, the outer surface of the columnar reinforcement tube 501 is integrally formed with a first cantilever bar 503 and a second cantilever bar 504, the first cantilever bar 503 and the second cantilever bar 504 are on the same horizontal plane, the first cantilever bar 503 and the second cantilever bar 504 are respectively matched with two guide grooves 4 arranged opposite to each other on the steel insert plate 3, the first cantilever bar 503 and the second cantilever bar 504 are respectively aligned and slide in the two guide grooves 4 arranged opposite to each other on the steel insert plate 3, when the first cantilever bar 503 and the second cantilever bar 504 slide in the guide groove 4, an accurate guiding function can be provided to ensure the stability and accuracy of the columnar reinforcement tube 501 during installation and use; the matching design of the first cantilever bar 503 and the second cantilever bar 504 and the guide groove 4 can reduce the friction coefficient, thereby improving the movement stability of the columnar reinforcement tube 501 and enhancing the convenience of operation.
[0036] like Figure 2 As shown, a first water retaining portion 505 is formed at the corner between the first outrigger 503 and the columnar reinforcement tube 501, and a second water retaining portion 506 is formed at the corner between the second outrigger 504 and the columnar reinforcement tube 501. The first and second water retaining portions 506 are designed to block water or rainwater from flowing along the outside of the structure to prevent water from scouring and entering the interior of the structure. The first water retaining portion 505 and the second water retaining portion 506 at the corner utilize the dynamic characteristics of water flow to change the water flow at the corner, slow down the water flow speed, and reduce erosion and scouring of the structure.
[0037] like Figure 2 and Figure 3 As shown, the first outrigger 503 and the second outrigger 504 are both provided with a first rib 507, and the second rib 508 is provided at the end of the first rib 507, and a 135° angle is formed between the first rib 507 and the second rib 508. The structure with a 135° angle can effectively change the direction of water flow; when the water flow contacts the first rib 507, it will be blocked by the rib, and part of the water flow will be guided to flow along the rib instead of directly entering the structure; the design of the corner will cause the water flow speed to slow down, which helps to reduce the impact force of the water flow on the surface of the structure, thereby reducing erosion and scouring, and the corner part can form a certain still water area, so that the water flow stagnates at the turn and gradually disperses, thereby better controlling the water flow and avoiding concentrated impact.
[0038] like Figure 3As shown, one end of the second rib 508 is fixedly connected to the first rib 507, and the other end of the second rib 508 is provided with an end plate 509, and a 60° angle is formed between the end plate 509 and the second rib 508. The 60° angle formed between the end plate 509 and the second rib 508 can effectively change the direction of water flow; when the water flow contacts the end plate 509, it will be forced to turn, preventing the water from flowing in a straight line and reducing the risk of water accumulation or infiltration; the 60° angle design can effectively guide the water flow toward the drain outlet, reduce the accumulation of water flow, and enhance the efficiency of the drainage system.
[0039] like Figure 3 As shown, a plurality of corrugated plates 5010 are arranged on the inner surface of the first rib 507. The plurality of corrugated plates 5010 are evenly spaced on the inner surface of the first rib 507, and a limiting groove 5011 is formed between two adjacent corrugated plates 5010. The arrangement of the corrugated plates 5010 can increase the rigidity and strength of the first rib 507, thereby improving the bearing capacity of the entire structure; this is because the corrugated plates 5010 can effectively disperse external forces, reduce deformation and stress concentration; and the plurality of corrugated plates 5010 can generate turbulence when the fluid flows, thereby enhancing the contact between the fluid and the surface of the structure, and improving the heat exchange or drainage efficiency.
[0040] like Figure 3 As shown, two oppositely disposed steel inserts 3 are fixedly connected by a female special-shaped reinforcement 6, and the female special-shaped reinforcement 6 is responsible for evenly distributing the load applied to the steel inserts 3, reducing local stress concentration, thereby improving the stability and bearing capacity of the entire structure.
[0041] like Figure 4 and Figure 5 As shown, several female special-shaped reinforcement members 6 are arranged from top to bottom along the long side direction of the steel insert plate 3, and several female special-shaped reinforcement members 6 along the long side direction of the steel insert plate 3 are formed, and the upper and lower adjacent female special-shaped reinforcement members 6 are welded and arranged, and several female special-shaped reinforcement members 6 form a stable female reinforcement structure 7. The arrangement of the female special-shaped reinforcement members 6 greatly improves the overall strength and stability of the structure, can withstand greater external loads, and avoid structural failure; the sub-reinforcement structure 8 and the female reinforcement structure 7 are matched to ensure the coordination of the overall structure and avoid loosening or failure.
[0042] like Figure 6As shown, there are several mother reinforcement structures 7 arranged along the long side direction of the positioning guide groove, and several mother reinforcement structures 7 and sub-reinforcement structures 8 are arranged alternately, and the mother reinforcement structure 7 and the sub-reinforcement structure 8 have the same structure. The mother reinforcement structure 7 and the sub-reinforcement structure 8 are arranged alternately, which can effectively utilize the space, maximize the bearing capacity of the structure, and reduce material waste; the end plate 509 on the mother reinforcement structure 7 and the insertion limit groove 5011 on the sub-reinforcement structure 8 are inserted and engaged with each other, and several sub-reinforcement structures 8 and the mother reinforcement structure 7 are engaged with each other to form a stable water-stop structure 9. The tight engagement between the mother reinforcement structure 7 and the sub-reinforcement structure 8 can improve the connection strength between the two, thereby reducing relative displacement, improving the stability of the overall structure, and preventing structural deformation caused by load changes; moreover, the mutual engagement design can form a continuous sealing surface, effectively preventing moisture penetration, thereby improving the anti-seepage performance of the structure; this is particularly important in aquatic environments or underground projects, which can prevent water intrusion and protect the internal structure.
[0043] like Figure 6 As shown, several sub-reinforcement structures 8 are arranged along the long side direction of the positioning guide groove, and several mother reinforcement structures 7 are arranged along the long side direction of the positioning guide groove, and an installation channel is formed between adjacent sub-reinforcement structures 8 and mother reinforcement structures 7, and a steel cage 10 is arranged in the installation channel of the positioning guide groove. The sub-reinforcement structure 8 and the mother reinforcement structure 7 provide necessary support so that the steel cage 10 can be firmly placed in the predetermined position; this design enhances the stability of the overall structure; by placing the steel cage 10 in the installation channel of the positioning guide groove, the load applied to the structure can be effectively dispersed, the mechanical properties are optimized, and the structure exhibits better uniformity and strength when bearing load; and the positioning guide groove and the sub-reinforcement structure 8 work together to limit the displacement and deformation of the steel cage 10, which helps to maintain the correct position of the steel bars during concrete pouring.
[0044] The construction method of the combined underground continuous wall comprises the following construction steps: S1: trough preparation; Before the project starts, transport vehicles, excavators, truck cranes, trenching machines, crawler cranes and other equipment and construction personnel enter the site; S2: Making an L-shaped guide wall 1; The total station is used for staking out, and the trench is excavated at the staking out point, and the template is supported and concrete is poured in sequence. After curing, two L-shaped guide walls 1 are symmetrically formed inside the trench. The depth of the L-shaped guide wall 1 is designed to be 2000mm, and the top of the L-shaped guide wall 1 is 150mm higher than the designed ground. S3: forming a positioning guide groove; A hydraulic grab method is used, and a vertical display and an automatic deviation correction device on the slotting machine are used to form a positioning guide groove between the two L-shaped guide walls 1, and the depth and verticality of the positioning guide groove are detected; S4: forming a guide groove 4; According to the design, along the long side direction of the L-shaped guide wall 1, a guide groove 4 extending vertically downward is excavated on the inner surface of the L-shaped guide wall 1 by a groove cutting machine; S5: Clean the positioning guide groove; After the excavation of the positioning guide groove is completed, the bottom of the groove is cleaned with a grab bucket, and then the wall is brushed with a wall brush, and repeated up and down several times until there is no mud on the wall brush. After cleaning the positioning guide groove, the verticality of the groove wall of the positioning guide groove is tested; S6: Install the sub-reinforcement structure 8; The steel plug plate 3 is aligned with the guide groove 4 on the L-shaped guide wall 1 by using a lifting device, and the steel plug plate 3 is inserted into the guide groove 4 on the L-shaped guide wall 1 by using a piling device, and then the first extension bar 503 and the second extension bar 504 on the sub-shaped reinforcement member 5 are respectively aligned and slid into two guide grooves 4 oppositely arranged on the steel plug plate 3, and the sub-shaped reinforcement members 5 are sequentially installed from top to bottom, and after welding two upper and lower adjacent sub-shaped reinforcement members 5, a stable sub-reinforcement structure 8 is formed; S7: Install the mother reinforcement structure 7; According to the installation method of S6, the mother reinforcement structure 7 is installed so that the mother reinforcement structure 7 and the sub-reinforcement structure 8 are adjacent and interlocked; S8: Install the steel cage 10; Use the lifting equipment to move the steel cage 10 from below to the installation channel formed between the main reinforcement structure 7 and the sub-reinforcement structure 8; S9: pouring concrete; Concrete is poured in the positioning guide groove by the conduit method. A watertight test is carried out before pouring. During pouring, the slump of the concrete is maintained at 20-22cm, and the initial pouring volume ensures that the buried depth of the conduit is not less than 1m. The concrete at the end of the positioning guide groove should be poured evenly and continuously, with a pouring rising speed of not less than 3m / h. The terminal pouring time should not exceed 30min, and the concrete slurry height is 50cm to ensure that the concrete net soil strength meets the design requirements; S10: forming an underground continuous wall; When the concrete strength reaches 70% or the concrete has been cured for 2 weeks, the underground continuous wall is obtained and the integrity of the underground continuous wall is tested by the acoustic wave projection method. The testing frequency shall not be less than 20%.
[0045] Working principle: During construction, the construction workers first bring in transport vehicles, excavators, truck cranes, trenching machines, crawler cranes and other equipment and construction workers before the project starts.
[0046] Then, the total station is used for layout, and the trench is excavated at the layout point. The formwork is supported and concrete is poured in sequence. After curing, two L-shaped guide walls 1 are symmetrically formed inside the trench. The depth of the L-shaped guide wall 1 is designed to be 2000mm, and the top of the L-shaped guide wall 1 is 150mm higher than the designed ground.
[0047] A hydraulic grab method is used, and a vertical display and an automatic deviation correction device on the slotting machine are used to form a positioning guide groove between the two L-shaped guide walls 1, and the depth and verticality of the positioning guide groove are detected.
[0048] According to the design, along the long side direction of the L-shaped guide wall 1, a vertical downward guide groove 4 is excavated on the inner surface of the L-shaped guide wall 1 by a groove cutting machine.
[0049] After the excavation of the positioning guide groove is completed, use a grab bucket to clean the bottom of the groove, and then use a wall brush to brush the wall, and repeat up and down several times until there is no mud on the wall brush. After cleaning the positioning guide groove, check the verticality of the groove wall of the positioning guide groove.
[0050] Then, the steel plug plate 3 is aligned with the guide groove 4 on the L-shaped guide wall 1 by using the lifting equipment, and the steel plug plate 3 is inserted into the guide groove 4 on the L-shaped guide wall 1 by using the piling equipment. Then, the first outrigger 503 and the second outrigger 504 on the sub-shaped reinforcement member 5 are respectively aligned and slid into the two guide grooves 4 oppositely arranged on the steel plug plate 3. The sub-shaped reinforcement members 5 are installed in sequence from top to bottom, and a stable sub-reinforcement structure 8 is formed by welding two upper and lower adjacent sub-shaped reinforcement members 5.
[0051] According to the installation method of the sub-reinforcement structure 8, the parent reinforcement structure 7 is installed in the same steps, so that the parent reinforcement structure 7 and the sub-reinforcement structure 8 are adjacent and interlocked.
[0052] Use lifting equipment to move the steel cage 10 from below to the installation channel formed between the main reinforcement structure 7 and the sub-reinforcement structure 8.
[0053] Finally, the slurry concrete is poured in the positioning guide groove by the conduit method. A watertight test is carried out before pouring. During pouring, the slump of the concrete is maintained at 20-22cm, and the initial pouring volume ensures that the buried depth of the conduit is not less than 1m. The concrete at the end of the positioning guide groove should be poured evenly and continuously, and the pouring rising speed should be not less than 3m / h. The terminal pouring time should not exceed 30min, and the concrete slurry height is 50cm to ensure that the concrete strength meets the design requirements.
[0054] When the concrete strength reaches 70%, the underground continuous wall is obtained, and the integrity of the underground continuous wall is tested by the acoustic wave projection method, with the testing frequency not less than 20%.
[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A combined underground continuous wall, comprising two L-shaped guide walls (1), Features: A positioning guide groove is formed between the two L-shaped guide walls (1), a positioning groove (2) is provided on the inner surface of the L-shaped guide wall (1), a steel insert plate (3) is provided in the positioning groove (2) of the L-shaped guide wall (1), a guide groove (4) is provided on the inner surface of the steel insert plate (3), and the two oppositely arranged steel insert plates (3) are fixedly connected by a sub-shaped reinforcement member (5), a plurality of sub-shaped reinforcement members (5) are arranged from top to bottom along the long side direction of the guide groove (4) of the steel insert plate (3), and adjacent upper and lower sub-shaped reinforcement members (5) are welded and arranged, and a plurality of sub-shaped reinforcement members (5) form a sub-reinforcement structure (8).
2. The combined underground continuous wall according to claim 1, Features: The sub-shaped reinforcement member (5) comprises a columnar reinforcement tube (501), and a through hole (502) is provided inside the columnar reinforcement tube (501).
3. The combined underground continuous wall according to claim 2, Features: The outer surface of the columnar reinforcement tube (501) is provided with a first cantilever bar (503) and a second cantilever bar (504), the first cantilever bar (503) and the second cantilever bar (504) respectively match between two guide grooves (4) arranged opposite to each other on the steel insert plate (3), and the first cantilever bar (503) and the second cantilever bar (504) are respectively aligned with and slide in the two guide grooves (4) arranged opposite to each other on the steel insert plate (3).
4. The combined underground continuous wall according to claim 3, Features: A first water retaining portion (505) is formed at a corner between the first overhanging strip (503) and the columnar reinforcement tube (501), and a second water retaining portion (506) is formed at a corner between the second overhanging strip (504) and the columnar reinforcement tube (501).
5. The combined underground continuous wall according to claim 3, Features: A first rib (507) is provided on both the first outrigger bar (503) and the second outrigger bar (504); a second rib (508) is provided at the end of the first rib (507); and an obtuse angle is formed between the first rib (507) and the second rib (508).
6. The combined underground continuous wall according to claim 5, Features: One end of the second rib plate (508) is fixedly connected to the first rib plate (507), and the other end of the second rib plate (508) is provided with an end plate (509), and an acute angle is formed between the end plate (509) and the second rib plate (508).
7. The combined underground continuous wall according to claim 6, Features: The inner surface of the first rib plate (507) is provided with a plurality of corrugated plates (5010), and an insertion limit groove (5011) is formed between two adjacent corrugated plates (5010).
8. The combined underground continuous wall according to claim 7, Features: It also includes a mother reinforcement structure (7) that matches the sub-reinforcement structure (8), wherein a plurality of the mother reinforcement structures (7) are arranged along the long side direction of the positioning guide groove, and the plurality of the mother reinforcement structures (7) and the sub-reinforcement structures (8) are arranged alternately, and the mother reinforcement structure (7) and the sub-reinforcement structure (8) are of the same structure.
9. A construction method for a combined underground continuous wall, based on the combined underground continuous wall according to any one of claims 1 to 8. Features: The construction steps include: S1: trough preparation; Before the project starts, transport vehicles, excavators, truck cranes, trenching machines, crawler cranes and other equipment and construction personnel enter the site; S2: Making an L-shaped guide wall (1); Using a total station to lay out, a trench is excavated at the layout point, and formwork is supported and concrete is poured in sequence. After curing, two L-shaped guide walls (1) are symmetrically formed inside the trench. S3: forming a positioning guide groove; A hydraulic grab method is used in combination with a slot forming machine to form a positioning guide slot between two L-shaped guide walls (1); S4: forming a guide groove (4); According to the design, along the long side direction of the L-shaped guide wall (1), a guide groove (4) extending vertically downward is excavated on the inner surface of the L-shaped guide wall (1) by a groove cutting machine; S5: Clean the positioning guide groove; After the excavation of the positioning guide groove is completed, use a grab bucket to clean the bottom of the groove, and then use a wall brush to brush the wall, and repeat up and down several times until there is no mud on the wall brush; S6: Install the sub-reinforcement structure (8); Using a lifting device, the steel plug plate (3) is aligned with the guide groove (4) on the L-shaped guide wall (1), and with the help of a pile driving device, the steel plug plate (3) is inserted into the guide groove (4) on the L-shaped guide wall (1), and then the first extension bar (503) and the second extension bar (504) on the sub-shaped reinforcement member (5) are respectively aligned and slid into two guide grooves (4) arranged opposite to each other on the steel plug plate (3), and the sub-shaped reinforcement members (5) are installed in sequence from top to bottom, and after welding two upper and lower adjacent sub-shaped reinforcement members (5), a sub-reinforcement structure (8) is formed; S7: Install the mother reinforcement structure (7); According to the installation method described in S6, the mother reinforcement structure (7) is installed so that the mother reinforcement structure (7) and the sub-reinforcement structure (8) are adjacent to each other and are interlocked; S8: Install the steel cage (10); Using a lifting device, move the lower part of the steel cage (10) to the installation channel formed between the main reinforcement structure (7) and the sub-reinforcement structure (8); S9: pouring concrete; Concrete is poured into the positioning guide groove using the conduit method, and a watertight test is carried out before pouring; S10: forming an underground continuous wall; When the concrete strength reaches 70% or the concrete is cured for 2 weeks, the underground continuous wall is obtained.
10. The construction method of the combined underground continuous wall according to claim 9, Features: In S7, the end plate (509) on the mother reinforcement structure (7) and the insertion limit groove (5011) on the sub-reinforcement structure (8) are inserted and engaged with each other, and a plurality of sub-reinforcement structures (8) and the mother reinforcement structure (7) are engaged with each other to form a stable water-stopping structure (9).