CN-121675439-B - Adjustable foundation pit engineering supporting structure

CN121675439BCN 121675439 BCN121675439 BCN 121675439BCN-121675439-B

Abstract

The invention belongs to the technical field of foundation pit support, and particularly relates to an adjustable foundation pit engineering support structure which comprises support units, wherein the support units comprise support base plates and support frame plates, the support base plates are abutted against the pit wall of a foundation pit and are connected through adjustable supports, a transverse support device is supported between the support frame plates of two opposite support units, the two support units are supported by the transverse support device in a counter force manner, the support units are supported by the transverse support device in a counter force manner and buffer the deformation pressure of the pit wall of the foundation pit through adjustable supports, and the support units in the same direction are spliced with each other.

Inventors

DAI BIN
ZHANG YANG
ZHANG WENJUN
LIU QUANBAO
LIU YUXIN
GUO JINGWEN
LIU XINMIAO
YANG BINYU
Chai Jieming

Assignees

山西四建集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (6)

1. The adjustable foundation pit engineering supporting structure is characterized by comprising supporting units, wherein each supporting unit comprises a supporting substrate (1) and supporting frame plates (2), the supporting substrate (1) is attached to the pit wall of a foundation pit, the supporting frame plates (2) are connected with the supporting substrate (1) through adjustable supports (3), a transverse supporting device (4) is propped between the supporting frame plates (2) of two opposite supporting units, the two supporting units are supported by the transverse supporting device (4) in a mutually opposite mode, and the supporting units buffer the deformation pressure of the pit wall of the foundation pit through the adjustable supports (3); The adjustable support (3) comprises arc-shaped spring plates (3.1) which are overlapped along the radial direction, the arc-shaped spring plates (3.1) are tightly matched with the fixing plates (3.3) and nuts (3.4) through U-shaped pull rods (3.2), the lengths of the arc-shaped spring plates (3.1) are shortened layer by layer from the outer layer to the inner layer, an outer lining plate (3.5) is lined between the arc-shaped spring plates (3.1) on the outermost layer and a transverse rod of the U-shaped pull rods (3.2), and an inner lining plate (3.6) is lined between the arc-shaped spring plates (3.1) on the innermost layer and the fixing plates (3.3); the cross rod of the U-shaped pull rod (3.2) is fixedly connected with the supporting base plate (1), and two arc ends of the arc-shaped spring plate (3.1) at the outermost layer are connected with the supporting frame plate (2) through sliding pairs; the support unit also comprises a water seepage and drainage mechanism (5), wherein the water seepage and drainage mechanism (5) comprises a water seepage conduit (5.1), a water seepage collecting bin (5.2) and a water collecting assembly; The water seepage collecting bin (5.2) is arranged on one surface of the supporting substrate (1) facing the supporting frame plate (2), the water seepage collecting bin (5.2) extends transversely and continuously on the supporting substrate (1) and is arranged at intervals longitudinally, the water seepage guide pipe (5.1) is inserted into the supporting substrate (1) within the range of the water seepage collecting bin (5.2), a water outlet (5.1.3) of the water seepage guide pipe (5.1) is communicated with the water seepage collecting bin (5.2), and a water inlet (5.1.2) of the water seepage guide pipe (5.1) is positioned on one side of the supporting substrate (1) facing the pit wall of the foundation pit; The water seepage collection bins (5.2) are communicated through downpipes (5.3), and the water seepage collection bin (5.2) at the lowest layer is communicated with the water collecting assembly; The water collecting assembly comprises a drainage conduit (5.4) and a water storage container (5.5), wherein the water storage container (5.5) is arranged on the outer side face of the support frame plate (2), one end of the drainage conduit (5.4) is connected with the water seepage collecting bin (5.2) at the lowest layer, the other end of the drainage conduit is connected with the water storage container (5.5), and a section of corrugated pipe (5.4.1) is connected in the drainage conduit (5.4); a three-way pipe (5.7) is arranged between the drainage pipe (5.4) and the water storage container (5.5), a first pipe orifice of the three-way pipe (5.7) is connected with the drainage pipe (5.4), a piston (5.8) is nested in a second pipe orifice, and a branch pipe (5.7.1) between the first pipe orifice and the second pipe orifice is connected with the water storage container (5.5); The outer side surface of the support frame plate (2) is hinged with a swing arm (6), a part of the swing arm (6) above a hinge point is connected with a pull rope (7), a part of the swing arm (6) below the hinge point is connected with a sector gear (8), a guide sleeve (9) is arranged on the outer side surface of the support frame plate (2), a push-pull rod (10) is inserted in the guide sleeve (9) in a sliding manner, a rack (10.1) on the push-pull rod (10) is meshed with the sector gear (8), and the push-pull rod (10) is connected with a handle (11) on the support frame plate (2) through sliding insertion; The vertical rod of the U-shaped pull rod (3.2) penetrates through the supporting frame plate (2) and then is connected with the push-pull plate (12), a limiting pipe (13) is arranged on the outer side face of the supporting frame plate (2), one end, far away from the swing arm (6), of the pull rope (7) penetrates through the limiting pipe (13) and then is connected with the push-pull plate (12), and a spring (14) is connected between the push-pull rod (10) and the supporting frame plate (2).
2. The adjustable foundation pit engineering supporting structure is characterized in that sliding rails (3.7) are fixed on the supporting frame plate (2), the sliding rails (3.7) on two sides of the arc-shaped spring plate (3.1) are a group, sliding grooves of the sliding rails (3.7) in the same group face the arc-shaped spring plate (3.1), inserting holes are formed in two arc ends of the arc-shaped spring plate (3.1) on the outermost layer, supporting shafts (3.8) are inserted into the inserting holes, and convex sliding blocks (3.9) on two ends of the supporting shafts (3.8) are respectively in sliding fit with sliding grooves of the sliding rails (3.7) on two sides.
3. The adjustable foundation pit engineering supporting structure of claim 1, wherein one end of the water seepage guide pipe (5.1) facing the pit wall of the foundation pit is a closed conical head, the water inlets (5.1.2) are uniformly distributed around the water seepage guide pipe (5.1) in a circle, the water seepage guide pipe (5.1) is externally connected with the water seepage bin (5.6) at the water inlet (5.1.2), the water seepage outlet (5.6.2) of the water seepage bin (5.6) is communicated with the water inlet (5.1.2) of the water seepage guide pipe (5.1), the water seepage inlet (5.6.3) of the water seepage bin (5.6) penetrates through the water seepage bin (5.6) and is communicated with the water seepage outlet (5.6.2), the water seepage bin (5.6) is connected with the soil-proof cover (5.6.1) obliquely shielding the outer side of the water seepage inlet (5.6.3), the water outlet (5.1.3) of the water seepage guide pipe (5.1) is of a conical closing structure, and the water seepage guide pipe (5.1) is connected with the water seepage bin (5.2) in a horn-shaped water stopping mode.
4. The adjustable foundation pit engineering supporting structure of claim 1, wherein the supporting units are spliced by supporting base plates (1) between the transverse directions and by supporting frame plates (2) between the longitudinal directions; The supporting base plates (1) are provided with slots (1.1), and plugboards (1.2) are inserted between the slots (1.1) of two laterally adjacent supporting base plates (1); the four corners of the support frame plates (2) are provided with horizontal lug plates (2.1), and the horizontal lug plates (2.1) of two longitudinally adjacent support frame plates (2) are connected through bolts (2.2).
5. The adjustable foundation pit engineering supporting structure of claim 1, wherein the pull rope (7) is buckled with the hanging ring (12.1) on the push-pull plate (12) through a hook (7.1).
6. The adjustable foundation pit engineering supporting structure of claim 1, wherein the supporting substrate (1) is connected with a grouting anchor rod (1.3), and the supporting substrate (1) can be connected to the wall of the foundation pit through the grouting anchor rod (1.3).

Description

Adjustable foundation pit engineering supporting structure Technical Field The invention belongs to the technical field of foundation pit support, and particularly relates to an adjustable foundation pit engineering support structure. Background Foundation pit engineering is an important link in building construction, and the safety and adaptability of a supporting structure of the foundation pit engineering are directly related to the overall stability and progress of the engineering. At present, a rigid supporting mode, such as a steel supporting mode, a concrete supporting mode and the like, is adopted for a common foundation pit supporting structure. When bearing the side earth pressure of the foundation pit, the structure has a certain bearing capacity, but has poor deformation adaptability. When the pit wall of the foundation pit generates larger pressure due to soil deformation, groundwater change or peripheral load action, the rigid support is easy to generate plastic deformation or local damage, and is difficult to recover after pressure unloading, so that the sustainability and reliability of the support effect are affected. In addition, the existing supporting structure depends on external drainage facilities when dealing with the problem of foundation pit water seepage, lacks a hydrologic management mechanism organically combined with a supporting body, and easily causes soil erosion and soil softening behind the supporting, so that pit wall deformation and supporting burden are aggravated. Therefore, a foundation pit supporting structure with self-adaptive adjustment capability, effective alleviation of pit wall deformation pressure and integrated drainage function is needed, so that safety, economy and construction convenience of foundation pit engineering are improved. Disclosure of Invention The invention aims to overcome the defects of the current foundation pit rigid supporting structure in terms of deformation adaptability, restoring capacity and drainage mechanism. The invention provides an adjustable foundation pit engineering supporting structure which comprises supporting units, wherein the supporting units comprise supporting base plates and supporting frame plates, the supporting base plates are abutted against the pit wall of a foundation pit, the supporting frame plates are connected with the supporting base plates through adjustable supports, a transverse supporting device is supported between the supporting frame plates of the two supporting units in opposite directions, the two supporting units are supported by the transverse supporting device in opposite directions, the supporting units are used for buffering deformation pressure of the pit wall through adjustable supports, and the supporting units in the same direction are spliced with each other. Further, the adjustable support comprises arc-shaped spring plates overlapped along the radial direction, the arc-shaped spring plates are tightened together through a U-shaped pull rod matched with a fixing plate and a nut, the length of each arc-shaped spring plate is shortened layer by layer from the outer layer to the inner layer, an outer lining plate is lined between the arc-shaped spring plate at the outer layer and the cross rod of the U-shaped pull rod, and an inner lining plate is lined between the arc-shaped spring plate at the inner layer and the fixing plate; The cross rod of the U-shaped pull rod is fixedly connected with the supporting base plate, and two arc ends of the arc-shaped spring plate on the outermost layer are connected with the supporting frame plate through sliding pairs. Further, the support frame plate is fixedly provided with slide rails, the slide rails on two sides of the arc-shaped spring plate are in a group, the slide grooves of the slide rails of the same group face the arc-shaped spring plate, the two arc ends of the arc-shaped spring plate on the outermost layer are provided with insertion holes, a support shaft is inserted into the insertion holes, and the convex sliding blocks at two ends of the support shaft are respectively in sliding fit with the slide grooves of the slide rails on two sides. The support unit further comprises a water seepage and drainage mechanism, wherein the water seepage and drainage mechanism comprises a water seepage conduit, a water seepage collecting bin and a water collecting assembly; The water seepage collecting bin is arranged on one surface of the supporting base plate facing the supporting frame plate, the water seepage collecting bin extends transversely and continuously on the supporting base plate and is longitudinally arranged at intervals, the water seepage guide pipe is inserted on the supporting base plate within the range of the water seepage collecting bin, the water outlet of the water seepage guide pipe is communicated with the water seepage collecting bin, and the water inlet of the water seepage guide pipe is positioned on one side of the support