Deep foundation pit enclosure wall supporting system

Abstract

According to the supporting system for the enclosure wall of the deep foundation pit, the whole concrete pouring piece is arranged between the concrete supporting block and the enclosure wall, the enclosure wall can be supported in an auxiliary mode through the servo telescopic supporting set of the concrete pouring piece, and when the supporting axial force of the concrete supporting block is reduced due to shrinkage creep or temperature deformation, the concrete pouring piece can be used for supporting the enclosure wall. The servo telescopic supporting set can supplement pressure in time, and reliable horizontal resistance is provided for the enclosure wall structure. When deformation of the enclosure wall structure exceeds a set control index, the supporting servo system can dynamically improve jacking force so as to reduce horizontal deformation of the enclosure wall, the actual rigidity of concrete supporting is greatly improved, the problem of rigidity loss caused by concrete shrinkage, creep and the like is effectively solved, and compared with a steel supporting system, the supporting servo system has the advantages that the structure is simple, and cost is low. The concrete supporting servo system structure is suitable for a foundation pit which is large in scale or irregular in plane shape, and especially when the concrete supporting servo system structure is close to an important existing building, the safety degree of the concrete supporting servo system structure is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to a deep foundation pit retaining wall support system and relates to the technical field of building construction. BACKGROUND

[0002] With the increasingly high technical requirements of urban building underground engineering, in super high-rise buildings, most of the foundation pit excavation depths reach more than 20 meters, these foundation pits usually require high protection of the surrounding environment, support of soft soil foundation pits with large planar dimensions or irregular shapes, and the existing technology is a steel pipe support commonly used for excavation support of deep foundation pits adjacent to the subway. This steel pipe support is suitable for relatively small foundation pits, however, the steel pipe support is mainly a passive force system, and the rigidity of the steel pipe support is prone to a certain bending value, resulting in deformation of the support structure, and the concrete support is prone to a decrease in support axial force and loss of support rigidity due to shrinkage and creep or temperature deformation, which easily leads to support deformation, and the strength of the concrete support alone is not enough, and the support effect on the foundation pit retaining wall is poor, so it is necessary to improve the deep foundation pit retaining wall support system. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model aims to provide a deep foundation pit retaining wall support system to solve the problems mentioned in the background.

[0004] The utility model is realized through the following technical scheme: a deep foundation pit retaining wall support system, comprising a concrete pouring piece and a retaining wall arranged at the front side of the concrete pouring piece, multiple mutually interlaced reinforcing steel bars are distributed horizontally and vertically inside the concrete pouring piece, multiple servo telescopic support groups for forward jacking support of the retaining wall are installed at the middle part of the inner side of the concrete pouring piece, and the reinforcing steel bars are distributed around the servo telescopic support groups for support.

[0005] The servo telescopic support group comprises a servo telescopic rod and a telescopic end arranged at the top of the servo telescopic rod, the telescopic end is movably connected with a movable support plate, and the movable support plate is abutted against the retaining wall through the side surface of the movable support plate, distance sensors are embedded and installed on the four sides of the other surface of the movable support plate, and the distance sensors are all located at one side of the concrete pouring piece.

[0006] Further improvement is that a universal ball head rod is fixedly arranged at the bottom of the movable support plate, and the universal ball head rod is movably connected with the telescopic end.

[0007] Further improvement is that multiple diamond-shaped surrounding steel nets are arranged at the inner side of the concrete pouring piece, and the diamond-shaped surrounding steel nets are supported by the outer periphery of the servo telescopic rod.

[0008] Further improvement is that the diamond-shaped surrounding steel nets are tightly connected with the reinforcing steel wires.

[0009] Further improvement is that the outer surface of the servo telescopic rod is fixed with a plurality of triangular pointed rings, and the diamond surrounding steel mesh is attached to the upper and lower inclined surfaces of the triangular pointed rings.

[0010] Compared with the prior art, the utility model has the advantages of:

[0011] The concrete pouring member can be arranged between the concrete support block and the enclosure wall, and multiple concrete pouring members are distributed, and the servo telescopic support group of the concrete pouring member can assist in supporting the enclosure wall, when the support axial force of the concrete support block is reduced due to shrinkage and creep or temperature deformation, the servo telescopic support group can timely supplement the pressure, and reliable horizontal resistance is provided for the enclosure wall structure; and when the deformation of the enclosure wall structure exceeds the established control index, the support servo system can dynamically increase the jacking force to reduce the horizontal deformation of the enclosure wall, the arrangement not only greatly improves the actual rigidity of the concrete support, effectively solves the rigidity loss problem caused by concrete shrinkage, creep and the like, significantly reduces the deformation development of the enclosure structure above the excavation surface, and compared with the steel support system, the concrete support servo system structure is suitable for large-scale or irregular planar shape foundation pits, and especially when close to important existing buildings, the safety degree of the concrete support servo system structure is higher;

[0012] The telescopic end of the servo telescopic rod is connected with the movable support plate through the universal ball head rod, so that the whole movable support plate can be in movable contact with the enclosure wall, so that when the enclosure wall or the concrete support block locally deforms, the corresponding movable support plate will be inclined, the distance sensors on the other side of the movable support plate detect the change in the distance between the movable support plate and the concrete pouring member, and feedback the external display control system, so that the position capable of locally deforming can be clearly known, and the deformation condition of the enclosure wall is judged according to the inclination angle of the movable support plate, and the use is more simple and convenient.

[0013] The diamond surrounding steel mesh and the reinforcing steel bars are arranged in the concrete pouring member and assist in supporting the servo telescopic rod, so as to improve the overall strength, and on the other hand, the diamond surrounding steel mesh can be clamped on the upper and lower inclined surfaces of the triangular pointed ring, so as to further clamp the servo telescopic rod and avoid dislocation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 It is a top view structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the utility model;

[0017] Figure 3 For the utility model Figure 2 The local structure diagram of A in the middle;

[0018] In the figure: concrete pouring part 1, reinforcing steel bar 2, servo telescopic support group 3, servo telescopic rod 31, telescopic end 32, movable support plate 33, distance sensor 34, universal ball head rod 35, diamond surrounding steel mesh 4, enclosure wall 5, triangular pointed ring 6. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0020] Please refer to Figures 1-3The utility model provides a kind of deep foundation pit retaining wall support system technical scheme: including concrete pouring piece 1 and the retaining wall 5 of being located in the front side of concrete pouring piece 1, entire concrete pouring piece 1 is arranged between concrete support block and retaining wall 5, and concrete pouring piece 1 is provided with multiple, interval distribution in different positions between concrete support block and retaining wall 5, the servo telescopic support group 3 of concrete pouring piece 1 can assist support retaining wall 5, multiple mutually interlaced reinforcing steel bars 2 are distributed with horizontal and longitudinal in concrete pouring piece 1, multiple servo telescopic support group 3 for forward to the servo telescopic support group 3 of supporting retaining wall 5 are installed in the middle of inboard of concrete pouring piece 1, and reinforcing steel bar 2 is distributed in the periphery of servo telescopic support group 3 and supports, play the reinforcing support of servo telescopic support group 3, when concrete support block causes the support axial force to reduce due to shrinkage creep or temperature deformation, this servo telescopic support group 3 can timely supplement pressure, provide reliable horizontal resistance for retaining wall 5 structure;Specifically, servo telescopic support group 3 includes servo telescopic rod 31 and telescopic end 32 located at the top of servo telescopic rod 31, the telescopic end 32 movably connects movable support plate 33, and is abutted with retaining wall 5 through the side surface of movable support plate 33, distance sensor 34 is embedded and installed towards four sides on the other side of movable support plate 33 respectively, the distance sensor 34 is all interval located in one side of concrete pouring piece 1, and the distance between four side distance sensors 34 and concrete pouring piece 1 is detected in real time respectively, when retaining wall 5 or concrete block is deformed, movable support plate 33 is inclined, makes four distance sensors 34 detect distance change, and is fed back to external display control system in time, the position of retaining wall 5 local deformation can be judged, and deformation deviation, and are ejected by servo telescopic rod 31, so that movable support plate 33 is tightly supported retaining wall 5, and reliable horizontal resistance is provided for retaining structure, and pressure sensor can be embedded and installed in the front side of movable support plate 33, and the pressure of retaining wall 5 can be fed back to external display control system, especially when retaining wall 5 structure deformation exceeds established control index, servo telescopic rod 31 is actively extended, improves the jacking force of movable support plate 33, and servo jacking force can be dynamically improved to reduce the horizontal deformation of retaining wall, the actual stiffness of concrete support is greatly improved by the arrangement, effectively solve the stiffness loss problem caused by concrete shrinkage, creep etc., and the deformation development of retaining structure above excavation surface is significantly reduced;

[0021] And in order to make movable support plate 33 have the effect of inclined rotation, monitoring the deformation of retaining wall 5, universal ball head rod 35 is fixedly arranged at the bottom of movable support plate 33, and the universal ball head rod 35 is connected with the universal rotation of telescopic end 32, so that movable support plate 33 can be inclined and rotated in multiple directions of telescopic end 32 of servo telescopic rod 31.

[0022] Meanwhile, the inside of the concrete pouring piece 1 is provided with six diamond-shaped surrounding steel nets 4, the diamond-shaped surrounding steel nets 4 are supported by the outer periphery distribution of the servo telescopic rod 31, the reinforcing steel bars 2 are divided into horizontal steel bars and vertical steel bars and are distributed staggeredly, the diamond-shaped surrounding steel nets 4 are tightly connected with the steel wires of the reinforcing steel bars 2, the setting can improve the strength of the concrete pouring piece 1 and the stability of the servo telescopic rod 31 in the concrete pouring piece 1, plays a role of supporting and stabilizing, and three triangular pointed rings 6 are fixed on the outer surface of the servo telescopic rod 31, every two diamond-shaped surrounding steel nets 4 are respectively attached to the upper and lower inclined surfaces of the triangular pointed ring 6, can limit the triangular pointed ring 6, thereby further limiting and fixing the servo telescopic rod 31, and the overall structural strength is better.

[0023] It should be noted that the utility model discloses a deep foundation pit retaining wall support system, which mainly improves the above-mentioned structure, and the functions, components and structures not mentioned can be implemented by using components and structures capable of realizing corresponding functions in the prior art, for example, the servo telescopic rod can be implemented by using a jack in the prior art.

[0024] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0025] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A deep excavation retaining wall support system characterized by: The application relates to a concrete pouring piece (1) and a surrounding wall (5) arranged in front of the concrete pouring piece (1), wherein a plurality of mutually interlaced reinforcing steel bars (2) are distributed in the concrete pouring piece (1) in the transverse and longitudinal directions, a plurality of servo telescopic support groups (3) for supporting the surrounding wall (5) in front are arranged in the middle of the inner side of the concrete pouring piece (1), and the reinforcing steel bars (2) are distributed around the servo telescopic support groups (3) for support. The servo telescopic support group (3) comprises a servo telescopic rod (31) and a telescopic end (32) arranged at the top of the servo telescopic rod (31), the telescopic end (32) is movably connected with a movable supporting plate (33), and the movable supporting plate (33) is abutted against the surrounding wall (5) through one side surface of the movable supporting plate (33), distance sensors (34) are respectively embedded and arranged on the other side surface of the movable supporting plate (33) on four sides, and the distance sensors (34) are all spaced apart from one side of the concrete pouring piece (1).

2. A deep excavation retaining wall support system according to claim 1, wherein: A universal ball head rod (35) is fixedly arranged at the bottom of the movable supporting plate (33), and the universal ball head rod (35) is movably connected with the telescopic end (32).

3. The deep excavation retaining wall support system according to claim 1, wherein: A plurality of diamond-shaped surrounding steel nets (4) are arranged on the inner side of the concrete pouring piece (1), and the diamond-shaped surrounding steel nets (4) are supported by the servo telescopic rod (31) in the peripheral direction.

4. A deep excavation retaining wall support system according to claim 3, wherein: The diamond-shaped surrounding steel nets (4) are tightly connected with the reinforcing steel bars (2).

5. The deep excavation retaining wall support system according to claim 3, wherein: A plurality of triangular pointed rings (6) are fixedly arranged on the outer surface of the servo telescopic rod (31), and the diamond-shaped surrounding steel nets (4) are arranged on the inclined surfaces of the upper and lower sides of the triangular pointed rings (6).

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