Foundation pit support structure of underground diaphragm wall of deep foundation pit

Abstract

The utility model discloses a deep foundation pit underground diaphragm wall foundation pit enclosure structure which comprises concrete enclosure walls, a retaining wall and a second support, the concrete enclosure walls are distributed on the two sides of a foundation pit, a top beam is formed by pouring of the concrete enclosure walls, bolt holes are symmetrically prefabricated in the two sides of the top beam, the retaining wall can be pre-installed through the bolt holes, and the second support is arranged on the retaining wall. A plurality of first supports are poured between the top beams to fix and support the top beams, a plurality of layers of waist beams are sequentially distributed between the concrete enclosure walls from top to bottom, and each second support comprises a first clamp assembly, a first fixing connector, a movable head and a stress applying mechanism. The retaining wall is mounted in an assembled manner, so that the overall construction time of the enclosure structure is shortened; the technical advantages that in the prior art, the fixing section of the second support is installed through bolts or in a welding mode, construction is rapid, and disassembly and recovery are achieved are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep foundation pit underground continuous wall foundation pit enclosure technical field, concretely relates to a deep foundation pit underground continuous wall foundation pit enclosure structure. BACKGROUND

[0002] As a kind of underground engineering, foundation pit engineering is widely used in municipal and housing construction engineering, and its application in urban rail transit, municipal pipe gallery, underground space development and utilization and railway engineering has gradually increased in recent years. Deep and large foundation pit engineering under various complex and special geological conditions is increasing, and super-large, super-deep and special-shaped foundation pit engineering of various special structural types is also increasing. According to different stratum geological conditions, combined with the development of underground water, the enclosure type of foundation pit can be generally divided into sheet pile type (such as steel sheet pile), column type (such as bored pile), underground continuous wall, self-standing improved soil retaining wall (such as high-pressure jet grouting pile stratum reinforcement), sinking well method and various combined methods.

[0003] The enclosure and support of the prior art foundation pit are mostly made of reinforced concrete structure, and the support is completely arranged inside the enclosure. However, there are some problems: the construction period of the reinforced concrete structure enclosure is long, the removal work of the enclosure and support is large and cannot be recycled; especially for the support installation structure after the second support, the installation method is mostly bolted or welded, which causes inconvenience in disassembly, high construction difficulty and low efficiency.

[0004] According to the prior art, the publication (announcement) number CN214169083U discloses a continuous wall enclosure with external tensile stress support for foundation pit. The enclosure pile made of H-shaped steel is arranged in sequence by piling to form a continuous wall, a water stop plate is arranged between two adjacent H-shaped steels, a ring beam is arranged on the top of the continuous wall formed by H-shaped steels, the foundation pit enclosure with full steel structure is completed, a concrete base is arranged on the outer side of the continuous wall enclosure of the foundation pit and corresponds to the V-shaped connecting seat on the ring beam, and a tensile stress support rod is arranged in an inclined manner, the connecting flange at one end of the tensile stress support rod is connected with the connecting plate of the V-shaped connecting seat on the ring beam, and the connecting flange at the other end is connected with the concrete base, so that the continuous wall enclosure has external support with tensile stress.

[0005] Therefore, it is necessary to provide a deep foundation pit underground continuous wall foundation pit enclosure structure. UTILITY MODEL CONTENTS

[0006] In view of the problems existing in the prior art, the utility model provides a deep foundation pit underground continuous wall foundation pit enclosure structure, which aims to solve the technical problems mentioned above.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme realizes: a deep foundation pit underground continuous wall foundation pit enclosure structure, and the foundation pit enclosure structure includes concrete enclosure wall, retaining wall, second support, and the concrete enclosure wall is distributed at both sides of the foundation pit, and the pouring of the concrete enclosure wall forms a corbel, and the both sides of the corbel are symmetrical and are precast bolt holes, and the retaining wall can be preinstalled through the bolt hole, and a plurality of first supports are poured between the corbel to fixedly support between the corbel, and a plurality of layers of waist beams are sequentially distributed from top to bottom between the concrete enclosure wall, and the number of each layer of waist beam is in pair distribution, and the second support is arranged between the waist beams to support between the concrete enclosure wall, and the second support includes clamp assembly one, fixed joint one, loose joint, stress applying mechanism, the fixed joint one is limitingly installed in the clamp assembly one and is clamped and installed to the fixed joint one, and the one end of the fixed joint one away from the clamp assembly one is fixedly installed with support rod one, and the one end of the support rod one away from the fixed joint one is fixedly installed with the loose joint, and the end face of the loose joint away from the support rod one is sequentially fixedly installed with support rod two and fixed plate one, and the circumference of the fixed plate one is fixedly installed with the waist beam through the bolt, and the circumference of the support rod two is provided with stress applying mechanism and rib plate, and the stress applying mechanism and the rib plate are adjacently arranged, and the bottom of the stress applying mechanism is screw-mounted with the fixed plate one, and the top end of the stress applying mechanism is abuttingly installed to the end face of the loose joint, and the rib plate is fixedly installed with the support rod two and the fixed plate one.

[0008] Preferably, the stress applying mechanism is provided as a jack or a telescopic rod.

[0009] Preferably, the fixed joint one includes a clamping portion and a clamping plate portion, and the clamping portion and the clamping plate portion are fixedly installed, and the clamp assembly one includes two hingedly installed clamping plates, and a limiting groove is formed at the inner wall end of the clamping plate, and the clamping portion is clamped and installed by the two clamping plates, and the clamping plate portion is clamped and limited by the limiting grooves of the two clamping plates.

[0010] Preferably, the loose joint is fixedly installed with the fixed plate two through the bolt and the end portion of the support rod one.

[0011] Preferably, at least two layers of waist beams are sequentially distributed from top to bottom between the concrete enclosure wall.

[0012] In conclusion, the utility model provides a deep foundation pit underground continuous wall foundation pit enclosure structure, a plurality of first supports are poured between the corbel to fixedly support between the corbel, preliminary support is formed to the concrete enclosure wall on both sides, the bolt hole is precast on the top of the corbel, the retaining wall is fixedly installed through the bolt hole, the enclosure structure construction is quickly installed, the pouring concrete enclosure wall in the prior art is solved, the retaining wall is poured, the retaining wall is installed through the assembly type, and the construction time of the whole enclosure structure is improved.

[0013] Three stress exerting mechanisms are evenly distributed around the movable head and the fixed plate, a threaded cylinder is arranged on the surface of the fixed plate I corresponding to the position of the stress exerting mechanism, the bottom end of the stress exerting mechanism is installed with the threaded cylinder, and the top end of the stress exerting mechanism abuts against the end face of the movable head, so that the stress support of the second support is increased; in order to strengthen the supporting effect of the supporting rod two, three rib plates are distributed around the supporting rod two, and the rib plates are arranged adjacent to the stress exerting mechanism.

[0014] The clamping plate part is clamped and limited by the upper limiting grooves of the two clamping plates, so as to be limited and installed between the two clamping plates of the fixed connector I, and the clamping part is clamped and fixedly installed by the two clamping plates; through the cooperation and installation of the fixed connector I and the clamp assembly I, the technical advantages that the second support is installed by bolt or welding in the prior art, the construction is quickly installed, and the second support is detachable and recyclable are realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a deep foundation pit underground continuous wall foundation pit enclosure structure schematic view of the utility model;

[0016] Figure 2 is a second support structure schematic view of the utility model;

[0017] Figure 3 is a fixed plate I and movable head installation structure schematic view of the utility model;

[0018] Figure 4 is a clamp assembly I and fixed connector I structure schematic view of the utility model;

[0019] Figure 5 is a fixed structure schematic view between the two clamping plates of the utility model;

[0020] In the drawing: concrete enclosure wall 1, retaining wall 2, second support 3, crown beam 4, bolt hole 5, first support 6, waist beam 7, clamp assembly I 11, fixed connector I 12, movable head 13, stress exerting mechanism 14, supporting rod I 15, supporting rod II 16, fixed plate I 17, rib plate 21, clamping part 22, clamping plate part 23, clamping plate 24, limiting groove 25, threaded cylinder 26, shaft sleeve three 27, shaft pin 31. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings.

[0022] As Figures 1 to 5 shown:

[0023] The utility model relates to a deep foundation pit underground continuous wall foundation pit enclosure structure, and the foundation pit enclosure structure includes concrete enclosure wall 1, retaining wall 2, second support 3, the concrete enclosure wall 1 is distributed at the both sides of foundation pit, and the pouring of concrete enclosure wall 1 forms crown beam 4, and the both sides symmetry prefabricated bolt hole 5 of crown beam 4 can preinstall retaining wall 2 through bolt hole 5, and the pouring of a plurality of first support 6 between crown beam 4 is to the fixed support between crown beam 4, and there are a plurality of layers of waist beam 7 from top to bottom in succession between concrete enclosure wall 1, and the quantity of each layer of waist beam 7 is in pair distribution, and the second support 3 is set between waist beam 7 to support between concrete enclosure wall 1, and the second support 3 includes clamp assembly one 11, fixed joint one 12, loose joint 13, stress exerting mechanism 14, fixed joint one 12 is limit installed inside clamp assembly one 11 and is clamped and installed to fixed joint one 12, and the one end fixedly installed with support rod one 15 of fixed joint one 12 away from clamp assembly one 11, the one end fixedly installed with loose joint 13 of support rod one 15 away from fixed joint one 12, and support rod two 16, fixed plate one 17 are fixedly installed in proper order to the end face of loose joint 13 away from support rod one 15, and the circumference of fixed plate one 17 is fixedly installed with waist beam 7 through bolt, and the circumference of support rod two 16 is provided with stress exerting mechanism 14, web plate 21, and stress exerting mechanism 14 and web plate 21 are adjacently arranged, the bottom of stress exerting mechanism 14 is screw-mounted with fixed plate one 17, the top end of stress exerting mechanism 14 is abuttingly installed to the end face of loose joint 13, and web plate 21 is fixedly installed with support rod two 16, fixed plate one 17.

[0024] To solve the technical problems that the construction period of the enclosure is long, the removal work of the enclosure and support is heavy and cannot be recycled in the prior art, the utility model patent adopts the structure that: the concrete enclosure wall 1 is poured and arranged at the both sides of the continuous wall foundation pit, the top of the concrete enclosure wall 1 is provided as the crown beam 4, a plurality of first supports 6 are poured between the crown beams 4 to fixedly support between the crown beams 4, the concrete enclosure wall 1 on both sides is preliminarily supported, the bolt hole 5 is prefabricated at the top of the crown beam 4, the retaining wall 2 is fixedly installed through the bolt hole 5, the enclosure structure construction is quickly installed, the pouring of the concrete enclosure wall 1 in the prior art is solved, the retaining wall 2 is poured, the retaining wall 2 is assembled and installed, and the construction time of the whole enclosure structure is improved.

[0025] In order to strengthen the support of the concrete retaining wall 1 on both sides, a plurality of layers of second supports 3 are arranged between the concrete retaining walls 1 to form the second supports 3 spaced from top to bottom in turn, and the two sides of the second supports 3 abut the waist beams 7. Through the cooperation of the waist beams 7 and the second supports 3, the concrete retaining wall 1 is supported to both sides. In order to realize the quick installation of the second supports 3, and the clamping and dismounting installation, and realize the advantages of recycling, the installation method adopted is that the clamp assembly one 11 is arranged on one side of the waist beam 7, the fixed connector one 12 is limitingly installed inside the clamp assembly one 11, and the fixed connector one 12 is clamped and installed. The fixed connector one 12 is fixedly installed with the support rod one 15 at the end away from the clamp assembly one 11. One side of the support rod one 15 is sequentially provided with the loose joint 13, the support rod two 16 and the fixed plate one 17. The circumferential direction of the fixed plate one 17 is provided with the bolt mounting plate. The bolt mounting plate is fixedly installed with the other side of the waist beam 7 through the bolt. In order to strengthen the support stress of the support rod two 16 and the support rod one 15, three stress applying mechanisms 14 are uniformly distributed on the circumferential direction of the loose joint 13 and the fixed plate one 17. The surface of the fixed plate one 17 is provided with the threaded cylinder 26 corresponding to the position of the stress applying mechanism 14. The bottom end of the stress applying mechanism 14 is installed with the threaded cylinder 26. The top end of the stress applying mechanism 14 abuts with the end face of the loose joint 13, so as to realize the increase of the stress support of the second support 3. In order to strengthen the support of the support rod two 16, three rib plates 21 are distributed on the circumferential direction of the support rod two 16, and the rib plates 21 are arranged adjacent to the stress applying mechanisms 14.

[0026] In at least one embodiment, preferably, the stress applying mechanism 14 is provided as a jack or an extension rod.

[0027] At least in one embodiment, the fixed joint 12 is limitedly installed in the interior of the clamp assembly 11, and the fixed joint 12 is clamped and installed by the clamp assembly 11, and further fixedly installed; the structure adopted is that: the fixed joint 12 comprises a clamping part 22 and a clamping plate part 23, the clamping part 22 and the clamping plate part 23 are fixedly installed, the clamp assembly 11 comprises two hingedly installed clamping plates 24, the end faces of the two clamping plates 24 are provided with shaft sleeves three 27, the shaft sleeves three 27 are inserted by a shaft pin 31, one side of the shaft pin 31 is inserted by a pin needle 32, the shaft pin 31 is limitedly inserted and installed in the shaft sleeve three 27, a limiting groove 25 is formed in the inner wall end of the clamping plate 24, the clamping part 22 is clamped and installed by the two clamping plates 24, the clamping plate part 23 is limitedly clamped by the limiting grooves 25 on the two clamping plates 24, so that the two clamping plates 24 are limitedly installed for the fixed joint 12, and the clamping part 22 is clamped and fixedly installed by the two clamping plates 24; by the cooperation of the fixed joint 12 and the clamp assembly 11, the bolt or welding installation of the fixed section of the second support 3 in the prior art is realized, the construction rapid installation is realized, and the technical advantages of being detachable and recyclable are realized.

[0028] At least in one embodiment, the articulated joint 13 is fixedly installed by the fixed plate two 26 at the end of the support rod one 15 through bolts, the articulated joint 13 and the support rod one 15 are detachably installed, the construction difficulty is reduced, the distributed installation mode is realized, and the technical advantages of being detachable and recyclable are realized.

[0029] At least in one embodiment, two layers of waist beams 7 are distributed from top to bottom between the concrete retaining walls 1; in actual use, the installation layers of the waist beams 7 and the second supports 3 are selected according to the depth of the foundation pit and the depth of the underground water layer, so as to meet the installation of the concrete retaining walls 1 on both sides.

[0030] The embodiments in the utility model are only used for illustrating the utility model, and do not constitute the limitation to the scope of claims, and other substantially equivalent alternatives that can be thought of by the person skilled in the art are all within the protection scope of the utility model.

Claims

1. A deep foundation pit diaphragm wall foundation pit enclosure characterized by, The foundation pit support structure comprises a concrete support wall (1), a retaining wall (2), and a second support (3). The concrete support wall (1) is distributed on both sides of the foundation pit. The pouring of the concrete support wall (1) forms a crown beam (4). The crown beam (4) is symmetrically provided with bolt holes (5) on both sides. The retaining wall (2) can be pre-installed through the bolt holes (5). A plurality of first supports (6) are poured between the crown beams (4) to fixedly support the crown beams (4). A plurality of waist beams (7) are sequentially distributed between the concrete support walls (1) from top to bottom. The number of waist beams (7) in each layer is in pairs. The second support (3) is arranged between the waist beams (7) to support the concrete support walls (1). The second support (3) comprises a clamp assembly (11), a fixed joint (12), a loose joint (13), and a stress applying mechanism (14). The fixed joint (12) is limitingly installed in the clamp assembly (11) and is clamped and installed. A support rod (15) is fixedly installed at one end of the fixed joint (12) away from the clamp assembly (11). The loose joint (13) is fixedly installed at one end of the support rod (15) away from the fixed joint (12). A support rod (16) and a fixed plate (17) are sequentially fixedly installed at the end face of the loose joint (13) away from the support rod (15). The fixed plate (17) is fixedly installed on the waist beam (7) through a bolt in the circumferential direction. The stress applying mechanism (14) and a rib plate (21) are circumferentially arranged on the support rod (16). The stress applying mechanism (14) is arranged adjacent to the rib plate (21). The stress applying mechanism (14) is threadedly installed at the bottom of the fixed plate (17). The top end of the stress applying mechanism (14) is abuttingly installed on the end face of the loose joint (13). The rib plate (21) is fixedly installed on the support rod (16) and the fixed plate (17).

2. The deep foundation pit underground diaphragm wall foundation enclosure according to claim 1, characterized in that, The stress applying mechanism (14) is a jack or an extension rod.

3. The deep foundation pit underground diaphragm wall foundation enclosure according to claim 1, characterized in that, The fixed joint (12) comprises a clamping portion (22) and a clamping plate portion (23). The clamping portion (22) and the clamping plate portion (23) are fixedly installed. The clamp assembly (11) comprises two hingeably installed clamping plates (24). A limiting groove (25) is formed at the inner wall end of the clamping plate (24). The clamping portion (22) is clamped and installed by the two clamping plates (24). The clamping plate portion (23) is clamped and limited by the limiting grooves (25) of the two clamping plates (24).

4. The deep foundation pit diaphragm wall foundation enclosure according to claim 1, characterized in that, The loose joint (13) is fixedly installed on the end of the support rod (15) through a fixed plate (26) by a bolt.

5. The deep foundation pit diaphragm wall foundation enclosure according to claim 1, characterized in that, At least two layers of waist beams (7) are sequentially distributed between the concrete support walls (1) from top to bottom.

Images