Pipe-jacking well supporting composite pile with anti-seepage function

Abstract

The utility model provides a pipe-jacking well supporting composite pile with an anti-seepage function. The pipe-jacking well supporting composite pile comprises a pile A and a pile B which are arranged at an interval and mutually engaged, H-shaped steel inserted in the pile A, a reinforcement cage inserted in the pile B, and a steel sheet pile which is arranged on the outer side of the engaged part of the pile A and the pile B and is connected between the pile A and the pile B through a connecting piece, the pile A and the pile B are tightly connected to resist water and soil pressure outside a pipe-jacking well, the H-shaped steel increases the rigidity of the pile body and the load bearing capacity in the vertical and horizontal directions, and the reinforcement cage can increase the tensile strength and integrity of the pile body, so that the stability and the bearing capacity of the whole supporting composite pile are enhanced, and the service life of the whole supporting composite pile is prolonged. The steel sheet piles on the outer sides of the meshing portions form a continuous anti-seepage barrier, underground water is effectively prevented from seeping into the pipe-jacking well from gaps between the piles, and therefore it is ensured that the construction environment in the dry interior of the pipe-jacking well is dry and safe, the anti-seepage performance is improved, and construction safety is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe jacking construction, and in particular relates to a pipe jacking well supporting composite pile with an anti-seepage function. Background Art

[0002] Pipe jacking is a trenchless construction technology that is widely used in the laying of underground pipelines, cables and other facilities, especially when it is necessary to cross roads, railways, rivers, buildings and other underground obstacles. Its core feature is that it can complete the installation of underground pipelines without excavation or minimize surface excavation, thereby minimizing interference with ground transportation, the environment and existing infrastructure.

[0003] During the pipe jacking construction process, it is first necessary to dig a working pipe jacking well (starting point) and a receiving pipe jacking well (end point) as the entry and exit places for the pipe jacking equipment. In order to ensure the stability and safety of the pipe jacking well during excavation, ensure the stability of the soil around the foundation pit, and avoid earth collapse, support measures are required for the pipe jacking well. The existing technology usually uses bored cast-in-place piles to enclose the pipe jacking well foundation pit, and constructs a mixing pile water-stop curtain on the basis of the bored cast-in-place piles to prevent groundwater from entering the foundation pit and ensure the dryness and safety of the inside of the foundation pit. However, this support method not only has a long construction period, weak adaptability, and high cost, but also in the construction of the mixing pile water-stop curtain, it is difficult for adjacent mixing piles to achieve a completely continuous and seamless wall effect. Therefore, there will be a certain void ratio between adjacent mixing piles, which will affect the strength and overall anti-seepage effect of the water-stop curtain, causing groundwater to seep into the foundation pit, posing a threat to construction progress and safety. Summary of the invention

[0004] The utility model aims to provide a composite pile for pipe jacking well support with anti-seepage function, so as to solve the problems of long construction period, weak adaptability, high cost and unstable water-stopping effect of existing pipe jacking well support.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A composite pile for supporting a pipe well with an anti-seepage function comprises A piles and B piles arranged at intervals and interlocked with each other, an H-shaped steel inserted inside the A pile, a steel cage inserted in the B pile, and a steel sheet pile arranged outside the interlocking part of the A pile and the B pile and connected between the A pile and the B pile through a connecting piece.

[0007] Preferably, the connecting member comprises: a connecting plate welded to the H-shaped steel and the steel cage respectively, and a connecting structure arranged on the connecting plate.

[0008] Preferably, the steel sheet piles are Larsen steel sheet piles, and inverted T-shaped grooves are provided at both ends of the steel sheet piles. The connecting structure includes: a limiting groove arranged at the end of the connecting plate, a T-shaped block fixed in the middle of the bottom surface of the limiting groove and adapted to the inverted T shape, and the inverted T-shaped groove is located in the limiting groove.

[0009] Preferably, a water-blocking material is filled between the limiting groove and the inverted T-shaped groove.

[0010] Preferably, a wear-resistant layer is provided on the inner wall of the limiting groove, the inner wall and the outer wall of the inverted T-shaped groove, and the outer wall of the T-shaped block.

[0011] Preferably, steel sheet piles are provided inside the engaging portion between the A pile and the B pile, and the steel sheet piles are connected via connectors A pile and B pile.

[0012] Preferably, bolt pull rods are connected between the steel sheet piles located on the inner and outer sides of the engagement portion of the A pile and the B pile, so as to further enhance the integrity of the entire supporting composite pile.

[0013] Preferably, the openings on both sides of the H-shaped steel are respectively arranged toward the B piles on both sides.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] 1. The utility model arranges A piles and B piles at intervals and interlocks with each other, so that the piles can form a tight connection to resist the water and soil pressure outside the jacking well. The H-shaped steel inserted inside the A pile increases the rigidity of the pile body and the load bearing capacity in the vertical and horizontal directions. The steel cage in the B pile can increase the tensile strength and integrity of the pile body, thereby enhancing the stability and bearing capacity of the entire supporting composite pile. The steel sheet piles arranged outside the interlocking part of the A pile and the B pile are connected to the A pile and the B pile through the connecting piece, which not only provides additional lateral support to prevent soil slippage, but also forms a continuous anti-seepage barrier to effectively prevent groundwater from infiltrating into the jacking well from the gaps between the piles, thereby ensuring that the construction environment inside the jacking well is dry and safe, reducing soil and water loss, further improving the anti-seepage performance of the entire supporting composite pile, and ensuring construction safety.

[0016] 2. The utility model supports composite piles to realize all-round support and anti-seepage of foundation pit, ensure the smooth progress of pipe jacking construction and the stability and safety of foundation pit, and has flexible construction, high construction efficiency and short construction cycle. Steel sheet piles and steel sections are recycled and reused, which is cost-effective and environmentally friendly.

[0017] 3. In the utility model, the connection plate is precisely matched with the inverted T-shaped groove of the steel sheet pile through the limiting groove and the T-shaped block at the end, so as to ensure the stable connection of the steel sheet pile and strengthen the connection strength of the overall structure; the water-blocking material filled between the limiting groove and the inverted T-shaped groove effectively prevents water from penetrating through the connection gap, thereby ensuring the sealing and integrity of the entire anti-seepage system; and the wear-resistant layer is provided on the inner wall of the limiting groove, the inner wall and outer wall of the inverted T-shaped groove and the outer wall of the T-shaped block, thereby reducing the wear during the construction process, extending the service life of the structure, and further ensuring the durability and safety of the structure;

[0018] 4. The utility model constructs a double anti-seepage system at the bite position of piles A and B by arranging steel sheet piles both inside and outside. The outer steel sheet piles first block the external groundwater from penetrating inward, and the inner steel sheet piles further prevent the infiltrated water from diffusing into the support structure through the bite position, thereby further enhancing the anti-seepage effect of the supporting composite piles. The inner and outer steel sheet piles work together to significantly increase the stiffness and strength of the bite position, exert stronger lateral constraints on the external soil, effectively resist soil pressure and suppress soil displacement, and improve the stability of the entire support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a composite pile for supporting a pipe jacking well with an anti-seepage function (with a steel sheet pile arranged on the outside);

[0021] Figure 2 It is a structural schematic diagram of a composite pile for supporting a pipe jacking well with an anti-seepage function (steel sheet piles are arranged on both the inside and the outside);

[0022] Figure 3 It is a schematic diagram of the connection structure of a connector and a steel sheet pile of a composite pile supporting a pipe jacking well with an anti-seepage function;

[0023] Figure numerals: 1-A pile, 2-B pile, 3-H-shaped steel, 4-rebar cage, 5-connecting piece, 6-steel sheet pile, 7-connecting plate, 8-inverted T-shaped groove, 9-limiting groove, 10-T-shaped block, 11-bolt pull rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0027] In addition, the terms “first”, “second”, “third”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0031] like Figure 1-Figure 3As shown, a composite pile for supporting a pipe jacking well with an anti-seepage function includes A piles 1 and B piles 2 arranged at intervals and interlocked with each other, an H-shaped steel 3 inserted inside the A pile 1, a steel cage 4 inserted in the B pile 2, and a steel sheet pile 6 arranged outside the interlocking part of the A pile 1 and the B pile 2 and connected between the A pile 1 and the B pile 2 through a connecting piece 5.

[0032] The openings on both sides of the H-shaped steel 3 are respectively arranged toward the B piles 2 on both sides.

[0033] The A pile 1 and the B pile 2 are arranged at intervals and interlock with each other, so that a tight connection can be formed between the piles to resist the water and soil pressure outside the jacking shaft. The H-shaped steel 3 inserted inside the A pile 1 increases the rigidity of the pile body and the load bearing capacity in the vertical and horizontal directions. The steel cage 4 in the B pile 2 can increase the tensile strength and integrity of the pile body, thereby enhancing the stability and bearing capacity of the entire supporting composite pile. The steel sheet pile 6 is arranged on the outside of the interlocking part of the A pile 1 and the B pile 2 and is connected to the A pile 1 and the B pile 2 through the connecting piece 5, which not only provides additional lateral support to prevent soil slippage, but also forms a continuous anti-seepage barrier, effectively preventing groundwater from infiltrating into the jacking shaft from the gaps between the piles, thereby ensuring that the construction environment inside the jacking shaft is dry and safe, reducing soil and water loss, further improving the anti-seepage performance of the entire supporting composite pile, and ensuring construction safety.

[0034] like Figure 2 As shown, the connecting member 5 includes: a connecting plate 7 welded to the H-shaped steel 3 and the steel cage 4 respectively, and a connecting structure arranged on the connecting plate 7.

[0035] Among them, the steel sheet pile 6 is a Larsen steel sheet pile 6, and an inverted T-shaped groove 8 is provided at both ends of the steel sheet pile 6. The connecting structure includes: a limiting groove 9 arranged at the end of the connecting plate 7, a T-shaped block 10 fixed in the middle of the bottom surface of the limiting groove 9 and adapted to the inverted T shape, and the inverted T-shaped groove 8 is located in the limiting groove 9.

[0036] In order to ensure the sealing and integrity of the entire anti-seepage system and effectively prevent water from penetrating through the connection gap, the space between the limiting groove 9 and the inverted T-shaped groove 8 is filled with a water-blocking material.

[0037] In order to reduce wear during construction, extend the service life of the structure, and further ensure the durability and safety of the structure, a wear-resistant layer is provided on the inner wall of the limit groove 9, the inner wall and outer wall of the inverted T-shaped groove 8, and the outer wall of the T-shaped block 10.

[0038] A steel sheet pile 6 is provided inside the engagement part of the A pile 1 and the B pile 2, and the steel sheet pile 6 is connected to the A pile 1 and the B pile 2 via a connector 5; a bolt pull rod 11 is connected between the steel sheet piles 6 located inside and outside the engagement part of the A pile 1 and the B pile 2.

[0039] Steel sheet piles 6 are arranged on both the inside and the outside, and a double anti-seepage system is constructed at the bite position of pile A 1 and pile B 2. The outer steel sheet piles 6 first block the external groundwater from penetrating inward, and the inner steel sheet piles 6 further prevent the infiltrated water from diffusing into the support structure through the bite position, further enhancing the anti-seepage effect of the support composite pile. The inner and outer steel sheet piles 6 work together to significantly increase the stiffness and strength of the bite position, exert stronger lateral constraints on the external soil, effectively resist soil pressure and suppress soil displacement, and improve the stability of the entire support structure. The setting of the bolt pull rod 11 further enhances the integrity of the entire support composite pile.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described by referring to the preferred embodiments of the utility model, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A composite pile for supporting a pipe jacking well with an anti-seepage function, characterized in that: The invention comprises A piles (1) and B piles (2) arranged at intervals and interlocked with each other, an H-shaped steel (3) inserted in the A pile (1), a steel cage (4) inserted in the B pile (2), and a steel sheet pile (6) arranged outside the interlocking part of the A pile (1) and the B pile (2) and connected between the A pile (1) and the B pile (2) through a connecting piece (5).

2. The composite pile for supporting a pipe jacking well with an anti-seepage function according to claim 1, characterized in that: The connecting member (5) comprises: a connecting plate (7) respectively welded to the H-shaped steel (3) and the steel cage (4), and a connecting structure arranged on the connecting plate (7).

3. The composite pile for supporting a pipe jacking well with an anti-seepage function according to claim 2, characterized in that: The steel sheet pile (6) is a Larsen steel sheet pile (6), and both ends of the steel sheet pile (6) are provided with inverted T-shaped grooves (8). The connection structure comprises: a limiting groove (9) arranged at the end of the connecting plate (7), a T-shaped block (10) fixed at the middle of the bottom surface of the limiting groove (9) and adapted to the inverted T shape, and the inverted T-shaped groove (8) is located in the limiting groove (9).

4. The composite pile for supporting a pipe jacking well with an anti-seepage function according to claim 3, characterized in that: The space between the limiting groove (9) and the inverted T-shaped groove (8) is filled with water-blocking material.

5. The composite pile for supporting a pipe jacking well with an anti-seepage function according to claim 3, characterized in that: The inner wall of the limiting groove (9), the inner wall and outer wall of the inverted T-shaped groove (8), and the outer wall of the T-shaped block (10) are all provided with a wear-resistant layer.

6. The composite pile for supporting a pipe jacking well with an anti-seepage function according to claim 1, characterized in that: A steel sheet pile (6) is provided inside the engagement portion between the A pile (1) and the B pile (2), and the steel sheet pile (6) is connected to the A pile (1) and the B pile (2) via a connecting piece (5).

7. The composite pile for supporting a pipe jacking well with an anti-seepage function according to claim 1, characterized in that: Bolt pull rods (11) are connected between the steel sheet piles (6) located inside and outside the engagement portion of the A pile (1) and the B pile (2).

8. The composite pile for supporting a pipe jacking well with an anti-seepage function according to claim 1, characterized in that: The openings on both sides of the H-shaped steel (3) are respectively arranged toward the B piles (2) on both sides.

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