A well pit water interception and soil retaining wall structure

Abstract

The application discloses a well pit water interception retaining wall structure and relates to the technical field of well pit water interception construction.The well pit water interception retaining wall structure comprises a plurality of mutually interlocked steel sheet piles, the steel sheet pile comprises a bottom plate and side plates connected to both ends of the bottom plate, the side plates are provided with interlocking buckles, the interlocking buckles comprise a frame plate one, a frame plate two and a filling interlocking connecting assembly which are continuously formed with the side plates, the interlocking buckles of adjacent steel sheet piles are mutually interlocked, and the inner wall arc surface one / two, the outer wall of the water interception circular arc part / the water interception half-arc part one / two and the inner folding plate arc surface one / two between the side plate and the frame plate one, the frame plate one and the frame plate two are designed in an arc surface close manner to replace traditional right-angle splicing, the arc-shaped interface can realize continuous sealing and eliminate the gap easily generated in right-angle splicing, the outer expansion arc part forms a pre-pressure through mutual extrusion, and the sealing property of the arc surface close design is further improved, and the water-tight effect can be realized without relying on external sealing strips.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of well pit water interception construction, and in particular relates to a well pit water interception soil retaining wall structure. BACKGROUND

[0002] The water interception curtain is a curtain-shaped vertical water interception protection body used to block or reduce the flow of groundwater into the well pit through the sidewall of the well pit. The construction methods of the water interception curtain include high-pressure jet grouting, underground continuous wall, small-tooth steel sheet pile, and deep cement-soil mixing pile.

[0003] Among them, the steel sheet pile curtain refers to the steel sheet pile driven into the soil layer around the well pit, and the necessary support or anchor is set to form a supporting structure, which can resist soil pressure and water pressure and maintain the stability of the surrounding stratum. The structure of the steel sheet pile has many types, and the U-shaped Larsen steel sheet pile is the most common.

[0004] The Larsen steel sheet pile includes a U-shaped pile body and a lock catch arranged on both sides of the pile body, and the adjacent steel sheet piles are buckled tightly through the lock catches. The steel sheet pile curtain has a water interception effect, but the design of the lock catch engagement structure of the current Larsen steel sheet pile will cause gaps between the lock catches, and water will flow into the well pit through the lock catch gaps.

[0005] In the prior art, the publication number is CN116180786A, and the name is a water interception curtain structure and its construction method, which relates to the technical field of foundation pit construction. The water interception curtain structure includes a plurality of steel sheet piles that are spliced with each other. The steel sheet pile includes a U-shaped pile body and a lock catch connected to both ends of the pile body. The lock catch includes a connection part connected to the pile body and a catch body connected to the connection part. The outer side of the catch body includes a slope, a water interception surface, and a water inlet surface in sequence. The slopes of the two adjacent catch bodies are in contact. The water interception surface is in contact with the connection part of the adjacent lock catch. The water inlet surface has a water inlet gap between the adjacent pile bodies. The catch body is provided with a sealing groove at the water interception surface. A sealing strip is arranged in the sealing groove. The catch body is provided with a water inlet hole at the water inlet surface. The water inlet hole is in communication with the sealing groove. The application sets a sealing strip at the water seepage path, and the greater the external water pressure, the better the sealing effect, which can effectively improve the water interception effect of the curtain structure.

[0006] However, this technical solution still has obvious limitations in actual engineering application, and it is difficult to meet the comprehensive needs of "sealing reliability, construction convenience, and cost economy". The specific problems are as follows:

[0007] 1. The sealing reliability depends on a single component, and there is a risk of failure. The core sealing function of this scheme is completely borne by the sealing strip. If the sealing strip is damaged during transportation and construction, or is aged due to long-term erosion by underground water and extrusion by soil, the sealing performance will be suddenly reduced, and a lasting and stable water interception effect cannot be formed.

[0008] 2. The construction process is complex, the cost and construction period are increased, in order to avoid the wear and tear of the sealing strip during the locking buckle splicing process, a blocking piece needs to be additionally arranged for protection, and the blocking piece is removed after the adjacent steel sheet piles are engaged, this additional process not only increases the material cost of the blocking piece, but also prolongs the construction period and reduces the splicing efficiency;

[0009] 3. The locking buckle is difficult to process, and the economy is poor, the width of the buckle body in the scheme is designed to be greater than the thickness of the steel sheet pile body, so that the locking buckle cannot be formed synchronously with the pile body, and the designed shape needs to be realized through secondary processing (such as additional cutting, welding or cold pressing), which significantly increases the processing cost and production period of the steel sheet pile. SUMMARY

[0010] The purpose of the present application is to provide a well pit water interception and soil retaining wall structure to solve the problems raised in the above background.

[0011] To solve the above technical problems, the basic idea of the technical scheme adopted by the present application is: a well pit water interception and soil retaining wall structure, comprising a plurality of mutually engaged and spliced steel sheet piles, the steel sheet pile comprising a bottom plate and side plates connected to both ends of the bottom plate, the side plate being provided with an engagement buckle, the engagement buckle comprising a frame plate one, a frame plate two and a filling engagement connecting component continuously formed with the side plate; after the engagement buckles between adjacent steel sheet piles are mutually engaged, a rectangular engagement area is formed between the adjacent two steel sheet piles through the frame plate one, the frame plate two and the filling engagement connecting component, and at least two cavities are formed in the rectangular engagement area.

[0012] Preferably, the included angle between the side plate and the bottom plate is greater than 90°, the included angle between the frame plate one and the side plate is greater than 90°, and the frame plate one is located on the side of the side plate away from the bottom plate, the frame plate two is perpendicular to the frame plate one, and the frame plate two is located on the opposite side of the side plate.

[0013] Preferably, the filling engagement connecting component comprises a water interception arc part integrally formed with the frame plate two, an inner wall arc surface one is arranged between the side plate and the frame plate one, the outer wall of the water interception arc part is in close contact with the inner wall of the inner wall arc surface one, the outer walls of the two water interception arc parts located in the rectangular engagement area are in close contact, and the cavity comprises an O-shaped cavity and a sub-cavity formed in the rectangular engagement area through the water interception arc part; a redundant area is left between one end of the water interception arc part and the frame plate two; wherein the two water interception arc parts in the rectangular engagement area are misaligned and engaged.

[0014] Preferably, the filling occlusal connecting assembly comprises a water-stopping semicircular part one integrally formed with the frame plate two, an inner wall arc surface one is arranged between the side plate and the frame plate one, and the outer wall of the water-stopping semicircular part one is close to the inner wall of the inner wall arc surface one; an outward expanding arc part is integrally arranged on the water-stopping semicircular part one, the radius of the outward expanding arc part is greater than the radius of the water-stopping semicircular part one, so that the two outward expanding arc parts in the rectangular occlusal area are close to each other, the cavity comprises a g-shaped cavity formed in the rectangular occlusal area by the water-stopping semicircular part one, the outward expanding arc part and the frame plate two; a redundant area is left between one end of the outward expanding arc part and the frame plate two; and the two water-stopping semicircular parts one in the rectangular occlusal area are misaligned and occluded.

[0015] Preferably, the filling occlusal connecting assembly comprises a water-stopping semicircular part two integrally formed with the frame plate two, an inner wall arc surface one is arranged between the side plate and the frame plate one, and the outer wall of the water-stopping semicircular part two is close to the inner wall of the inner wall arc surface one; a straight line part is integrally arranged on the water-stopping semicircular part two, the straight line part is perpendicular to the connecting line between the centers of the two water-stopping semicircular parts two in the rectangular occlusal area; the cavity comprises a water drop-shaped cavity formed in the rectangular occlusal area by the water-stopping semicircular part two, the straight line part and the frame plate two; a redundant area is left between one end of the straight line part and the frame plate two; and the two water-stopping semicircular parts two in the rectangular occlusal area are misaligned and occluded.

[0016] Preferably, the filling occlusal connecting assembly comprises an inner folding plate one integrally formed with the frame plate two, an inner wall arc surface one is arranged between the side plate and the frame plate one, an inner folding plate arc surface one is formed between the frame plate two and the inner folding plate one, and the outer wall of the inner folding plate arc surface one is close to the inner wall of the inner wall arc surface one; an inner folding plate two is integrally arranged on the inner folding plate one, a straight plate one is integrally arranged on the inner folding plate two, the straight plate one is perpendicular to the connection between the centers of the two inner folding plate arc surfaces one in the rectangular occlusal area, and the outer walls of the two straight plates one are close to each other; the cavity comprises a character-shaped cavity formed in the rectangular occlusal area by the frame plate two, the inner folding plate one, the inner folding plate two and the straight plate one; a redundant area is left between one end of the straight plate one and the frame plate two; and the two inner folding plates two and the straight plates one in the rectangular occlusal area are misaligned and occluded.

[0017] Preferably, the filling occlusion connecting assembly comprises an inner folding plate one integrally formed with a frame plate two, an inner folding plate camber one is formed between the frame plate two and the inner folding plate one, an inner folding plate two is integrally formed on the inner folding plate one, an inner folding plate camber two is arranged between the inner folding plate one and the inner folding plate two, an inner wall camber one is arranged between the side plate and the frame plate one, an inner wall camber two is arranged between the frame plate one and the frame plate two, the outer wall of the inner folding plate camber one is tightly attached to the inner wall of the inner wall camber one, and the outer wall of the inner folding plate camber two is tightly attached to the inner wall of the inner wall camber two; the inner folding plate two is integrally formed with a straight plate two, the straight plate two is parallel to the bottom plate, and the outer walls of the two straight plates two in the rectangular occlusion area are tightly attached; the chamber comprises a U-shaped chamber e formed in the rectangular occlusion area by the frame plate two, the inner folding plate one, the inner folding plate two and the straight plate two; a redundant area is left between one end of the straight plate two and the frame plate two; and the two straight plates two in the rectangular occlusion area are horizontally occluded.

[0018] Further, the chamber is provided with a buffer.

[0019] Compared with the prior art, the technical scheme has the following beneficial effects:

[0020] 1. In the rectangular occlusion area formed after the adjacent steel sheet piles are occluded, at least two independent chambers such as O-shaped chamber, g-shaped chamber, water drop-shaped chamber, 9-shaped chamber and U-shaped chamber are constructed by filling occlusion connecting assembly (water interception circular arc part, water interception half-arc part one / two, inner folding plate one / two, straight plate one / two, etc.). The multi-chamber design can prolong the water seepage path and disperse water pressure: even if there is micro-seepage in a single chamber, other chambers can still intercept water flow; at the same time, the chamber can accommodate a small amount of seepage water and reduce the seepage water pressure through overflow, completely avoiding the risk of "one seam leaks" of the traditional chamberless structure.

[0021] 2. In the well pit water interception and soil retaining wall structure, the inner wall camber one / two between the side plate and the frame plate one, the frame plate one and the frame plate two, the outer wall of the water interception circular arc part / water interception half-arc part one / two, and the inner folding plate camber one / two adopt arc surface tight design instead of traditional straight angle splicing: the arc interface can realize continuous sealing and eliminate the gap easily generated by straight angle splicing; the outer expansion arc part forms a pre-pressure by mutual extrusion, further improving the sealing property of the tight fit, and the water-tight effect can be achieved without relying on external sealing strips.

[0022] 3. In the well pit water interception and soil retaining wall structure, the water interception circular arc part, water interception half-arc part one / two, inner folding plate one / two and straight plate one / two in the rectangular occlusion area adopt staggered occlusion or horizontal occlusion: staggered occlusion converts linear gaps into zigzag paths, increasing the seepage resistance; horizontal occlusion is aimed at the stress characteristics of the well pit side wall to ensure complete fit in the horizontal direction and prevent new gaps from being generated by angle deviation, cutting off the possibility of water seepage from the path design.

[0023] 4. The well pit water interception retaining wall structure, the rigid frame formed by the first frame plate and the second frame plate can uniformly distribute the occlusion pressure and reduce local gaps; at the same time, the redundant area reserved between the occlusion connection assembly and the second frame plate can provide elastic space for the occlusion displacement of the steel sheet pile, uneven settlement of the stratum or construction error, avoid structural deformation caused by rigid contact, and balance long-term stability and dynamic adaptability.

[0024] 5. The well pit water interception retaining wall structure, the occlusion interface area of the first straight plate and the second straight plate is increased by close design of the outer wall: when the steel sheet pile is displaced to the adjacent pile body under stress, the close area of the first straight plate and the second straight plate will gradually increase, and the occlusion strength will be improved with the increase of stress, further strengthening the water seepage resistance and avoiding the expansion of the gap caused by stress.

[0025] 6. The well pit water interception retaining wall structure, the rectangular occlusion area and the side plate and the bottom plate of the steel sheet pile are formed continuously or integrally, without the need for secondary welding or assembly; at the same time, without the need for additional installation of sealing strips, protective flaps and other auxiliary components, the manufacturing and splicing process is greatly simplified, and the processing difficulty and construction time cost are reduced.

[0026] 7. The well pit water interception retaining wall structure, the scheme replaces the traditional sealing strip sealing by self-sealing structure, avoids frequent replacement caused by aging and wear of the sealing strip; all core components are metal integrated structures, which are durable, do not need to frequently check or replace the vulnerable parts in long-term use, and reduce the later maintenance cost.

[0027] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] In the drawings:

[0029] Figure 1 A three-dimensional structure diagram of a well pit water interception retaining wall structure according to the present application Figure 1 ;

[0030] Figure 2 A top view of a well pit water interception retaining wall structure according to the present application Figure 1 ;

[0031] Figure 3 A structure diagram of a water interception arc part, an O-shaped chamber and a secondary chamber of a well pit water interception retaining wall structure according to the present application

[0032] Figure 4 A three-dimensional structure diagram of a well pit water interception retaining wall structure according to the present application Figure 2 ;

[0033] Figure 5 A top view of a well pit water interception retaining wall structure according to the present applicationFigure 2 ;

[0034] Figure 6 Structure diagram of water interception semi-arc part one, outer expansion arc part, and G-shaped cavity of the well pit water interception and soil retaining wall structure;

[0035] Figure 7 Structure diagram of the well pit water interception and soil retaining wall structure Figure 3 ;

[0036] Figure 8 Structure diagram of the well pit water interception and soil retaining wall structure Figure 3 ;

[0037] Figure 9 Structure diagram of water interception semi-arc part two, straight line part, and water drop-shaped cavity of the well pit water interception and soil retaining wall structure;

[0038] Figure 10 Structure diagram of the well pit water interception and soil retaining wall structure Figure 4 ;

[0039] Figure 11 Structure diagram of the well pit water interception and soil retaining wall structure Figure 4 ;

[0040] Figure 12 Structure diagram of straight plate one and 9-shaped cavity of the well pit water interception and soil retaining wall structure;

[0041] Figure 13 Structure diagram of the well pit water interception and soil retaining wall structure Figure 5 ;

[0042] Figure 14 Structure diagram of the well pit water interception and soil retaining wall structure Figure 5 ;

[0043] Figure 15 Structure diagram of straight plate two and U-shaped cavity of the well pit water interception and soil retaining wall structure.

[0044] In the figure: 1, rectangular occlusion area; 10, steel sheet pile; 100, occlusion buckle; 101, bottom plate;

[0045] 102, side plate; 1021, inner wall arc surface one;

[0046] 103, frame plate one; 1031, inner wall arc surface two;

[0047] 104, frame plate two;

[0048] 105. Inner fold plate one; 105a. Inner fold plate arc surface one; 106. Inner fold plate two; 106a. Inner fold plate arc surface two; 107a. Straight plate one; 107b. Straight plate two;

[0049] 11a. Water-cutting circular arc section; 11b. Water-cutting semi-circular arc section one; 11c. Water-cutting semi-circular arc section two;

[0050] 12a. O-shaped chamber; 12b. G-shaped chamber; 12c. Teardrop-shaped chamber; 12d. Figure-9 shaped chamber; 12e. U-shaped chamber;

[0051] 13. Secondary chamber;

[0052] 14a. Outwardly expanding arc section; 14b. Straight line section;

[0053] 2. Buffer components; 3. Redundancy area. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0055] The following is in conjunction with the appendix Figure 1 -Appendix Figure 15 The technical solutions provided in each embodiment of the present invention will be described in detail.

[0056] Reference Figure 2 This embodiment relates to a retaining wall structure for well pit water interception, aiming to solve the problem of water seepage into the well pit caused by gaps in the interlocking joints of steel sheet piles in the prior art. It also avoids relying on a single component for sealing reliability, simplifies the construction process, and reduces the difficulty of processing the interlocking joints. The structure includes multiple interlocking steel sheet piles 10. Each steel sheet pile 10 includes a base plate 101 and side plates 102 connected to both ends of the base plate 101. Interlocking fasteners 100 are provided on the side plates 102. Further, the interlocking fasteners 100 include a first frame plate 103 and a second frame plate 104 continuously formed with the side plates 102, as well as a filling interlocking connection assembly. In practical applications, the filling interlocking connection assembly refers to the structural component continuously formed with the second frame plate 104, used to fill the space and form a cavity during the interlocking process. It can be implemented using plates of various geometric shapes, such as straight plates, curved plates, or bent plates. Its main purpose is to create multiple independent cavities within the rectangular interlocking area 1 to block the water flow path.

[0057] Specifically, after the engagement buckles 100 of the adjacent steel sheet piles 10 are engaged with each other, the rectangular engagement area 1 is formed between the adjacent two steel sheet piles 10 through the side frame plate one 103, the side frame plate two 104 and the filling engagement connecting assembly, and at least two cavities are formed in the rectangular engagement area 1. Thus, the multi-cavity design in the rectangular engagement area 1 provides multiple water flow blocking paths through physical separation, that is, even if a single cavity exists micro-permeation, other cavities can still effectively intercept water flow, thereby avoiding the risk of sealing failure; at the same time, since the engagement buckles 100 and the side plates 102 are continuously formed, secondary processing is not required, thereby reducing the manufacturing difficulty; in addition, the structure does not require additional installation of sealing strips (the main function of the sealing strips in the prior art is to fill the gap between two steel sheet piles) and protective flaps, thereby simplifying the splicing process. As an embodiment, the formation of the rectangular engagement area 1 relies on the rigid frame effect of the side frame plate one 103 and the side frame plate two 104, which uniformly distributes the engagement pressure and reduces the generation of local gaps. Thus, the structure design replaces the scheme relying on the sealing strip in the prior art through the one-piece engagement design, thereby effectively improving the water blocking reliability and optimizing the construction efficiency.

[0058] In order to further optimize the engagement tightness of the steel sheet pile 10, the included angle between the side plate 102 and the bottom plate 101 is greater than 90° and less than 180° (an obtuse angle structure), which aims to make the stress distribution of the steel sheet pile 10 more uniform when bearing the earth pressure and water pressure, thereby avoiding the bending deformation of the connection between the bottom plate 101 and the side plate 102 due to the acute stress concentration, and maintaining the structural rigidity during the engagement process.

[0059] The included angle between the side frame plate one 103 and the side plate 102 is greater than 90° and less than 180° (an obtuse angle structure), wherein the side frame plate one 103 is arranged parallel to the bottom plate 101, and the side frame plate one 103 is located on the side of the side plate 102 away from the bottom plate 101, the side frame plate two 104 is perpendicular to the side frame plate one 103, and the side frame plate two 104 is located on the opposite side of the side plate 102, which aims to maintain the shape integrity of the rectangular engagement area 1 after the splicing of the two steel sheet piles 10, thereby avoiding the distortion of the rectangular engagement area 1 to generate gaps.

[0060] As a preferred embodiment, with reference to Figure 1 , Figure 2 , Figure 3, the filling bite connection assembly comprises a water-stopping arc section 11a integrally formed with the second frame plate 104, the inner wall arc surface 1021 is arranged between the side plate 102 and the first frame plate 103, the outer wall of the water-stopping arc section 11a is close to the inner wall of the inner wall arc surface 1021, and the outer walls of the two water-stopping arc sections 11a located in the rectangular bite area 1 are close to each other, the cavity comprises an O-shaped cavity 12a and a sub-cavity 13 formed in the rectangular bite area 1 through the water-stopping arc section 11a; a redundant area 3 is left between one end of the water-stopping arc section 11a and the second frame plate 104; wherein the two water-stopping arc sections 11a in the rectangular bite area 1 are misaligned and engaged.

[0061] The water-stopping arc section 11a refers to an arc-shaped sealing structure integrally formed with the second frame plate 104, which can be directly stamped or cold-bent into shape by using a metal plate, and its purpose is to form a continuous sealing interface by close-fitting the arc surface to avoid the dependence on external sealing strips; after the two steel sheet piles 10 are spliced, the water-stopping arc section 11a is close to the inner wall of the inner wall arc surface 1021, which can eliminate the hidden danger of traditional right-angle gaps; the outer walls of the two water-stopping arc sections 11a are close to each other, which can effectively improve the firmness of the adjacent steel sheet piles 10 after connection;

[0062] The O-shaped cavity 12a and the sub-cavity 13 formed can effectively prolong the water seepage path and disperse water pressure; compared with the design without a cavity in the prior art, the cavity can disperse water pressure and avoid continuous water seepage, and when the water pressure in the cavity is large, the water in the cavity can also overflow to reduce the water seepage pressure;

[0063] The redundant area 3 between one end of the water-stopping arc section 11a and the second frame plate 104 is designed to provide an elastic space for displacement during the bite process of the steel sheet pile 10, to adapt to uneven settlement of the stratum or construction errors, and to prevent deformation caused by rigid contact;

[0064] The misaligned engagement is to make the connection of the two steel sheet piles 10 more stable; it can be understood as a bite mode in which the two water-stopping arc sections 11a in the rectangular bite area 1 are offset and staggered in space, and its purpose is to convert a straight gap into a zigzag path to increase the water seepage resistance.

[0065] It should be understood that, Figure 3 The two horizontal and vertical dashed lines in the figure indicate the misalignment of the two water-stopping arc sections 11a in the rectangular bite area 1.

[0066] As a preferred embodiment, refer to Figure 4 , Figure 5 , Figure 6The filling bite connection assembly includes a water-stopping semicircular part 11b integrally formed with the second frame plate 104, which can be realized by using an arc plate with different radii of curvature, aiming to form a continuous contact interface with the adjacent components through the arc surface, and eliminate linear gaps. An inner wall arc surface 1021 is arranged between the side plate 102 and the first frame plate 103, which refers to the arc inner surface between the side plate 102 and the first frame plate 103, and can be realized by using a smooth transition arc surface or an arc surface with micro-texture, aiming to provide a matching contact surface with the outer wall of the water-stopping semicircular part 11b, and the outer wall of the water-stopping semicircular part 11b is in close contact with the inner wall of the inner wall arc surface 1021;

[0067] The water-stopping semicircular part 11b is integrally formed with an outward expanding arc part 14a with a larger radius than that of the water-stopping semicircular part 11b, which refers to the arc-shaped expanded part with a larger radius integrally formed on the water-stopping semicircular part 11b, and can be realized by using a gradually changing radius arc structure or a segmented arc structure, aiming to press the outward expanding arc parts 14a against each other when splicing, form a pre-pressure, and improve the sealing between the two outward expanding arc parts 14a, so that the two outward expanding arc parts 14a in the rectangular bite area 1 are close to each other;

[0068] The chamber includes a g-shaped chamber 12b formed in the rectangular bite area 1 by the water-stopping semicircular part 11b, the outward expanding arc part 14a, and the second frame plate 104, which has an asymmetric curved surface layout that can guide a small amount of seepage water to flow along the g-shaped path and disperse water pressure, and at the same time, use the chamber space to accommodate a small amount of seepage water to play a buffering role;

[0069] A redundant area 3 is left between one end of the outward expanding arc part 14a and the second frame plate 104, which is used to reserve elastic deformation displacement space when there is uneven settlement or stress fluctuation;

[0070] Among them, the two water-stopping semicircular parts 11b in the rectangular bite area 1 are misaligned and bite; the steel sheet pile 10 is more stable in connection, and an effective sealing water-stopping retaining wall is formed;

[0071] Through the above scheme, the sealing between the two steel sheet piles 10 is further improved, and the problem of water flowing into the pit along the gap is avoided;

[0072] It should be understood that, since the two outward expanding arc parts 14a are close to each other in the rectangular bite area 1, a chamfer is respectively formed on the outward expanding arc part 14a at both ends of the steel sheet pile 10, which facilitates the insertion of one steel sheet pile 10 into the other steel sheet pile 10 at the initial stage;

[0073] It should be understood that, Figure 6 The two horizontal and vertical dashed lines refer to the misalignment of the two water-stopping semicircular parts 11b in the rectangular bite area 1.

[0074] As a preferred embodiment, with reference to Figure 7 , Figure 8 , Figure 9 , the filled bite connection assembly includes a water stop half-arc part two 11c integrally formed with the frame plate two 104, which is an arc-shaped water stop structure integrally formed with the frame plate two 104, which can be realized by cold bending forming process of metal plate with semicircular or elliptical cross section, which aims to provide a sealing interface matching the inner wall arc surface one 1021, eliminating the straight water seepage path, the inner wall arc surface one 1021 is arranged between the side plate 102 and the frame plate one 103, which can be realized by a curved surface structure with circular arc transition or parabolic transition, which aims to form a close fit with the outer wall of the water stop half-arc part two 11c, avoid the gap caused by angle mutation, and the outer wall of the water stop half-arc part two 11c is closely attached to the inner wall of the inner wall arc surface one 1021;

[0075] A linear part 14b is integrally formed on the water stop half-arc part two 11c, which is a linear extension part integrally formed on the water stop half-arc part two 11c, which aims to increase the bite interface, prolong the water seepage path, and be perpendicular to the center line of the water stop half-arc part two 11c to evenly distribute the bite force, thereby improving the bite strength of the rectangular bite area 1 and the sealing performance between adjacent steel sheet piles 10; wherein when one of the steel sheet piles 10 is displaced in the direction of the other steel sheet pile 10 under stress, the two linear parts 14b are more closely attached to each other, and the attachment area gradually increases, which can further improve the water seepage resistance when the steel sheet pile 10 is stressed;

[0076] The chamber includes a water drop type chamber 12c formed by the water stop half-arc part two 11c, the linear part 14b and the frame plate two 104 in the rectangular bite area 1, which is a closed space with a water drop shape formed by the water stop half-arc part two 11c, the linear part 14b and the frame plate two 104, which can be realized by a single curvature or a composite curvature water drop profile, which aims to improve the connection strength of the steel sheet pile 10 while increasing the contact area, prolonging the water seepage path and increasing the flow resistance;

[0077] A redundant area 3 is left between one end of the linear part 14b and the frame plate two 104, which can be realized by a fixed size gap, which aims to adapt to construction errors and stratum displacement, and provide elastic adjustment space;

[0078] Among them, the two water stop half-arc parts two 11c in the rectangular bite area 1 are misaligned, which means that the two water stop half-arc parts two 11c in the rectangular bite area 1 are not completely symmetrical in position when spliced, which aims to make the sealing line asymmetrically distributed, increase the tortuosity of the water seepage path, and improve the firmness of the two steel sheet piles 10 after mutual bite;

[0079] It should be understood that,Figure 9 The two horizontal and vertical dotted lines indicate the staggered arrangement of the two water-blocking semicircular sections 11c in the rectangular occlusion area 1;

[0080] Therefore, in this scheme, the initial gap is eliminated by matching the curved surface of the water-blocking semicircular section 11c and the inner wall arc surface 1021, so that water flow cannot penetrate along the flat interface; at the same time, the straight line part 14b is arranged vertically with the center line of the water-blocking semicircular section 11c to ensure uniform distribution of occlusion force and prevent local stress concentration; the geometric shape of the water droplet-shaped cavity 12c prolongs the potential water penetration path, forcing the water flow to change direction multiple times; the redundant area 3 provides elastic adjustment space to adapt to external deformation; and the staggered occlusion makes the sealing line asymmetrically distributed, fundamentally blocking the straight-line water penetration channel, in addition to avoiding the dependence on external sealing elements, simplifying the construction process, improving the water-blocking reliability, and at the same time enhancing the adaptability of the structure to construction errors and ground displacement.

[0081] As a preferred embodiment, with reference to Figure 10 、 Figure 11 、 Figure 12 , the filled occlusion connection assembly includes an inner folding plate 105 integrally formed with the frame plate 104, and the inner folding plate 105 is a continuously formed bending structural component with the frame plate 104, which can be realized by hot rolling integral forming or cold bending process, aiming to eliminate the connection interface and avoid potential leakage points caused by welding or assembly;

[0082] An inner wall arc surface 1021 is arranged between the side plate 102 and the frame plate 103, wherein the inner wall arc surface 1021 can be understood as the arc-shaped inner surface of the transition area between the side plate 102 and the frame plate 103, which can be formed by die stamping or numerical control bending, aiming to provide a continuous and uniform pressure distribution interface;

[0083] An inner folding plate arc surface 105a is formed between the frame plate 104 and the inner folding plate 105, specifically, the inner folding plate arc surface 105a is an arc-shaped transition surface between the frame plate 104 and the inner folding plate 105, which can be designed as a circular arc or an elliptical arc with different radii of curvature, aiming to form a closely fitted sealing fit with the inner wall arc surface 1021, and the outer wall of the inner folding plate arc surface 105a is closely attached to the inner wall of the inner wall arc surface 1021, forming a continuous and uniform pressure distribution interface during the process of driving the steel sheet pile 10 into the ground layer, so that the arc surface geometric characteristics automatically maintain close contact under the action of ground layer variation or water pressure;

[0084] The inner folding plate one 105 is integrally provided with an inner folding plate two 106, and the inner folding plate two 106 is integrally provided with a straight plate one 107a, wherein the straight plate one 107a can be understood as a flat plate structure perpendicular to the center line of the two inner folding plate curved surfaces one 105a in the rectangular occlusal area 1, and the purpose is to form a water-tight barrier by the outer walls of the two straight plates one 107a, so as to improve the water seepage prevention performance; the connection between the straight plate one 107a and the centers of the two inner folding plate curved surfaces one 105a in the rectangular occlusal area 1 is perpendicular, and the outer walls of the two straight plates one 107a are tightly attached.

[0085] The chamber includes a 9-shaped chamber 12d formed in the rectangular occlusal area 1 by the frame plate two 104, the inner folding plate one 105, the inner folding plate two 106, and the straight plate one 107a, which forms a zigzag internal path, effectively prolongs the potential water seepage channel and increases the water flow resistance.

[0086] A redundant area 3 is left between one end of the straight plate one 107a and the frame plate two 104, and an elastic space is reserved.

[0087] Among them, the two inner folding plate twos 106 and the straight plate one 107a in the rectangular occlusal area 1 are misaligned and occluded, which disperses the occlusion force, avoids the concentration of gaps, inhibits the water seepage path along the straight line gap, and thus forms a complete self-sealing system.

[0088] It should be understood that, Figure 12 The two cross dashed lines in the rectangular occlusal area 1 indicate the positions of the centers of the inner folding plate curved surfaces one 105a, and the intersecting perpendicular dashed lines indicate that the connection between the straight plate one 107a and the centers of the two inner folding plate curved surfaces one 105a in the rectangular occlusal area 1 is perpendicular.

[0089] As a preferred embodiment, referring to Figure 13 , Figure 14 , Figure 15 The filling occlusion connecting assembly includes an inner folding plate one 105 integrally formed with the frame plate two 104, and the inner folding plate one 105 is a bending structure continuously formed with the frame plate two 104, which can be directly manufactured integrally with the frame plate two 104 by hot rolling forming process, avoiding welding process, so as to improve the structural integrity and reduce the secondary processing cost.

[0090] The frame plate two 104 and the inner folding plate one 105 form an inner folding plate curved surface one 105a, specifically, the inner folding plate curved surface one 105a is an arc transition surface between the frame plate two 104 and the inner folding plate one 105, which can be designed as a circular arc or an elliptical arc with different radii of curvature, and the purpose is to form a sealing fit tightly attached with the inner wall curved surface one 1021.

[0091] The inner folding plate two 106 is integrally formed on the inner folding plate one 105, specifically, the inner folding plate two 106 is a secondary folding component extended from the inner folding plate one 105, which can be realized by a synchronous folding process with the inner folding plate one 105, and the purpose is to disperse the soil pressure and water pressure;

[0092] The inner folding plate arc surface two 106a is arranged between the inner folding plate one 105 and the inner folding plate two 106, and the inner wall arc surface two 1031 is arranged between the frame plate one 103 and the frame plate two 104, the outer wall of the inner folding plate arc surface two 106a is tightly attached to the inner wall of the inner wall arc surface two 1031, and the purpose is that the inner folding plate arc surface two 106a and the inner wall arc surface two 1031 form a tightly attached sealing fit;

[0093] The straight plate two 107b is integrally formed on the inner folding plate two 106, the straight plate two 107b is parallel to the bottom plate 101, and the outer walls of the two straight plate twos 107b in the rectangular occlusion area 1 are tightly attached, and the purpose is to provide large-area planar contact to block the water flow path;

[0094] The chamber includes a U-shaped chamber 12e formed in the rectangular occlusion area 1 by the frame plate two 104, the inner folding plate one 105, the inner folding plate two 106, and the straight plate two 107b, and the shape optimizes the water flow blocking capability, which can effectively collect and retain seepage water and buffer the seepage water pressure;

[0095] A redundant area 3 is left between one end of the straight plate two 107b and the frame plate two 104, and an elastic space is reserved;

[0096] Among them, the two straight plate twos 107b in the rectangular occlusion area 1 are horizontally occluded, and the horizontal occlusion design ensures complete fit in the horizontal direction according to the stress characteristics of the well pit side wall, preventing gaps caused by angle deviation.

[0097] As a preferred embodiment, referring to Figure 3 , Figure 6 , Figure 9 , Figure 13 , Figure 15 In order to prevent the chamber from being easily deformed or damaged under the action of external soil pressure or water pressure, causing the occlusion area gap to expand and the water interception reliability to decrease, and lacking a stress buffering mechanism under long-term dynamic load, aggravating the leakage risk, a buffer 2 is arranged in the chamber, the buffer 2 is an elastic component that can absorb and disperse external dynamic stress, which can be realized by using rubber materials, spring structures or foam fillers, and the purpose is to effectively relieve the concentrated stress caused by soil extrusion or water flow impact through the elastic deformation capability, avoiding plastic deformation or micro-cracks of the chamber wall, thereby maintaining the structural integrity of the occlusion area.

[0098] Specifically, the O-shaped chamber 12a, the g-shaped chamber 12b, the water drop-shaped chamber 12c, the 9-shaped chamber 12d, and the U-shaped chamber 12e are internally configured with the buffer 2. When the external earth pressure or water pressure acts on the steel sheet pile 10, the buffer 2 is elastically compressed to absorb and disperse dynamic stress, preventing stress concentration from causing damage to the chamber wall surface. At the same time, the buffer 2 dynamically compensates for the instantaneous change in the geometric shape of the chamber under the action of pressure, maintaining the close-fitting state between adjacent steel sheet piles 10 in the rectangular engagement area 1, thereby ensuring that the engagement area maintains sealing performance under long-term dynamic load and avoiding the problem of gap expansion caused by chamber deformation.

[0099] Among them, the buffer 2 in the O-shaped chamber 12a, the g-shaped chamber 12b, the water drop-shaped chamber 12c, and the 9-shaped chamber 12d is mainly filled in a large-area chamber, so part of the chamber will also be reserved for water buffering, and the configuration of the buffer 2 will not cause the chamber to be completely filled.

[0100] When the buffer 2 is configured in the U-shaped chamber 12e, the buffer 2 needs to be designed separately, and a buffer cavity needs to be provided on the buffer 2 and communicated with the U-shaped chamber 12e. When water seeps in, the water can enter the buffer cavity in the buffer 2.

[0101] Among them, since the buffer 2 is configured in the O-shaped chamber 12a, the g-shaped chamber 12b, the water drop-shaped chamber 12c, the 9-shaped chamber 12d, and the U-shaped chamber 12e, the buffer 2 will not rub during splicing, thereby avoiding large-area wear of the buffer 2.

[0102] Therefore, the setting of the buffer 2 effectively prevents the rigid deformation of the chamber under external load, ensures the stability of the gap in the engagement area, significantly improves the water interception reliability of the well pit water interception and soil retaining wall structure in complex geological environments, and reduces the risk of leakage.

[0103] The above only describes the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the present application.

Claims

1. A well pit water intercepting retaining wall structure comprising a plurality of mutually interlocked steel sheet piles (10), the steel sheet piles (10) comprising a base plate (101) and side plates (102) connected to both ends of the base plate (101), respectively, the side plates (102) being provided with interlocking buckles (100), characterized in that, The bite buckle (100) comprises a frame plate one (103), a frame plate two (104) and a filling bite connecting assembly which are continuously formed with the side plate (102); After the bite buckles (100) between adjacent steel sheet piles (10) are engaged with each other, a rectangular bite area (1) is formed between the adjacent two steel sheet piles (10) through the frame plate one (103), the frame plate two (104) and the filling bite connecting assembly, and at least two cavities are formed in the rectangular bite area (1); An included angle between the side plate (102) and the bottom plate (101) is greater than 90°, an included angle between the frame plate one (103) and the side plate (102) is greater than 90°, the frame plate one (103) is located on a side of the side plate (102) away from the bottom plate (101), the frame plate two (104) is perpendicular to the frame plate one (103), and the frame plate two (104) is located on an opposite side of the side plate (102). The filling bite connecting assembly comprises a water-cutting circular arc part (11a) which is integrally formed with the frame plate two (104), an inner wall arc surface one (1021) is arranged between the side plate (102) and the frame plate one (103), an outer wall of the water-cutting circular arc part (11a) is tightly attached to an inner wall of the inner wall arc surface one (1021), outer walls of two water-cutting circular arc parts (11a) located in the rectangular bite area (1) are attached to each other, and the cavity comprises an O-shaped cavity (12a) and a sub-cavity (13) which are formed in the rectangular bite area (1) through the water-cutting circular arc part (11a); A redundant area (3) is left between one end of the water-cutting circular arc part (11a) and the frame plate two (104). The two water-cutting circular arc parts (11a) in the rectangular bite area (1) are engaged in a staggered manner.

2. A well pit water intercepting retaining wall structure according to claim 1, wherein Alternatively, the filling bite connecting assembly comprises a water-cutting half-arc part one (11b) which is integrally formed with the frame plate two (104), an inner wall arc surface one (1021) is arranged between the side plate (102) and the frame plate one (103), and an outer wall of the water-cutting half-arc part one (11b) is tightly attached to an inner wall of the inner wall arc surface one (1021); An outward-expanding arc part (14a) is integrally arranged on the water-cutting half-arc part one (11b), a radius of the outward-expanding arc part (14a) is greater than a radius of the water-cutting half-arc part one (11b), the two outward-expanding arc parts (14a) in the rectangular bite area (1) are close to each other, and the cavity comprises a g-shaped cavity (12b) which is formed in the rectangular bite area (1) through the water-cutting half-arc part one (11b), the outward-expanding arc part (14a) and the frame plate two (104); A redundant area (3) is left between one end of the outward-expanding arc part (14a) and the frame plate two (104). The two water-cutting half-arc parts one (11b) in the rectangular bite area (1) are engaged in a staggered manner.

3. The utility pit water intercepting and soil retaining structure according to claim 1, wherein Or, the filling occlusion connecting assembly comprises a water-stopping semicircular part two (11c) integrally formed with the frame plate two (104), and an inner wall arc surface one (1021) is arranged between the side plate (102) and the frame plate one (103); and an outer wall of the water-stopping semicircular part two (11c) is tightly attached to an inner wall of the inner wall arc surface one (1021). A straight line part (14b) is integrally arranged on the water-stopping semicircular part two (11c), and the straight line part (14b) is perpendicular to a connecting line between two centers of the water-stopping semicircular part two (11c) in the rectangular occlusion area (1). The chamber comprises a water-drop type chamber (12c) formed by the water-stopping semicircular part two (11c), the straight line part (14b) and the frame plate two (104) in the rectangular occlusion area (1). A redundant area (3) is left between one end of the straight line part (14b) and the frame plate two (104). The two water-stopping semicircular part two (11c) in the rectangular occlusion area (1) are misaligned and occluded.

4. The utility pit water intercepting and soil retaining structure according to claim 1, wherein Or, the filling occlusion connecting assembly comprises an inner folding plate one (105) integrally formed with the frame plate two (104), and an inner wall arc surface one (1021) is arranged between the side plate (102) and the frame plate one (103); and an inner folding plate arc surface one (105a) is formed between the frame plate two (104) and the inner folding plate one (105), and an outer wall of the inner folding plate arc surface one (105a) is tightly attached to an inner wall of the inner wall arc surface one (1021). An inner folding plate two (106) is integrally arranged on the inner folding plate one (105), and a straight plate one (107a) is integrally arranged on the inner folding plate two (106), and the straight plate one (107a) is perpendicular to a connecting line between two centers of the inner folding plate arc surface one (105a) in the rectangular occlusion area (1), and outer walls of the two straight plate one (107a) are tightly attached to each other. The chamber comprises a 9-shaped chamber (12d) formed by the frame plate two (104), the inner folding plate one (105), the inner folding plate two (106) and the straight plate one (107a) in the rectangular occlusion area (1). A redundant area (3) is left between one end of the straight plate one (107a) and the frame plate two (104). The two inner folding plate two (106) and the straight plate one (107a) in the rectangular occlusion area (1) are misaligned and occluded.

5. The utility pit water intercepting and soil retaining structure according to claim 1, wherein Or, the filling bite connection assembly includes an inner folding plate one (105) integrally formed with the frame plate two (104), an inner folding plate camber one (105a) is formed between the frame plate two (104) and the inner folding plate one (105), an inner folding plate two (106) is integrally formed on the inner folding plate one (105), an inner folding plate camber two (106a) is arranged between the inner folding plate one (105) and the inner folding plate two (106), an inner wall camber one (1021) is arranged between the side plate (102) and the frame plate one (103), an inner wall camber two (1031) is arranged between the frame plate one (103) and the frame plate two (104), the outer wall of the inner folding plate camber one (105a) is close to the inner wall of the inner wall camber one (1021), and the outer wall of the inner folding plate camber two (106a) is close to the inner wall of the inner wall camber two (1031); The inner folding plate two (106) is integrally formed with a straight plate two (107b), the straight plate two (107b) is parallel to the bottom plate (101), and the outer walls of two straight plate twos (107b) in the rectangular bite area (1) are close to each other; The chamber includes a U-shaped chamber (12e) formed by the frame plate two (104), the inner folding plate one (105), the inner folding plate two (106) and the straight plate two (107b) in the rectangular bite area (1); A redundant area (3) is left between one end of the straight plate two (107b) and the frame plate two (104). The two straight plate twos (107b) in the rectangular bite area (1) are horizontally engaged.

6. A well pit water intercepting retaining wall structure according to any one of claims 1, 2, 3, 4, 5, characterized in that, A buffer (2) is arranged in the chamber.

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