CN-122013743-A - Method for installing and constructing side soil pressure gauge of underground diaphragm wall of hydraulic tunnel deep shaft

CN122013743ACN 122013743 ACN122013743 ACN 122013743ACN-122013743-A

Abstract

The invention relates to the technical field of safety monitoring and discloses a method for installing and constructing a side direction soil pressure gauge of an underground continuous wall of a deep vertical shaft of a hydraulic tunnel, which comprises the following construction steps that 1) a groover forms a groove in a construction site, and two sides of the groover are provided with groove side walls; 2), carrying out groove cleaning treatment, 3) putting in a reinforcement cage, wherein two sides of the reinforcement cage are provided with cage side parts, and side part intervals are arranged between the reinforcement cage and the side walls of the groove, the reinforcement cage is provided with a power pushing structure and a connecting plate of the power pushing structure, and a lateral soil pressure gauge is arranged on the connecting plate, 4) after the reinforcement cage is put in a preset depth to be fixed, the power pushing structure pushes the connecting plate until the lateral soil pressure gauge is abutted against the side walls of the groove, 5) casting concrete, wrapping the reinforcement cage in the concrete, solidifying the concrete to form an underground diaphragm wall, and exposing the lateral soil pressure gauge at the side parts of the underground diaphragm wall, so that even if the soil pressure is changed after the concrete is solidified, the lateral soil pressure monitoring data can still meet the accuracy requirement.

Inventors

YANG SHUAIDONG
ZHAO KANGDING
ZHAO SHUANGHUA
WU DANHUI
LI YUQI
WANG WEIGUANG
CHANG YAN
WANG LUZHOU
TANG LU
DENG HENG

Assignees

珠江水利委员会珠江水利科学研究院

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (10)

1. The hydraulic tunnel deep shaft underground continuous wall side direction soil pressure gauge installation construction method is characterized by comprising the following construction steps: 1) Digging in a construction site by adopting a trencher, and forming a trench with a set depth in the construction site, wherein two sides of the trench are respectively provided with a trench side wall; 2) Carrying out groove cleaning treatment on the groove; 3) A reinforcement cage is arranged in the groove, cage side parts are arranged on two sides of the reinforcement cage, and side part intervals are arranged between the cage side parts and the side walls of the groove; 4) When the reinforcement cage is lowered to a set depth in the groove and is fixed in the groove, the power pushing structure pushes the connecting plate to move towards the side wall of the groove until the lateral soil pressure gauge is abutted against the side wall of the groove; 5) And pouring concrete in the groove, wherein the reinforcement cage is wrapped in the concrete, the concrete is solidified to form the underground diaphragm wall, and the lateral soil pressure gauge is exposed at the side part of the underground diaphragm wall.
2. The method according to claim 1, wherein in the construction step 3), the power pushing structure comprises a pneumatic pump, the pneumatic pump is provided with a telescopic piston shaft, the piston shaft is connected with a connecting plate, and in the construction step 4), the pneumatic pump drives the piston shaft to extend towards the side wall of the groove, and the connecting plate is pushed to move towards the side wall of the groove until the side soil pressure gauge abuts against the side wall of the groove.
3. The method for installing and constructing the hydraulic tunnel deep vertical shaft underground diaphragm wall side soil pressure gauge according to claim 2, wherein in the construction step 3), an outer shell is sleeved outside the pneumatic pump, the outer shell is fixedly connected to a reinforcement cage and is arranged perpendicular to the side wall of the groove, a closed inner cavity is formed in the outer shell, the pneumatic pump is arranged in the inner cavity, and the piston shaft extends out of the inner cavity and is connected with the connecting plate.
4. The method for installing and constructing the hydraulic tunnel deep shaft underground diaphragm wall side soil pressure gauge according to claim 3, wherein in the constructing step 3), the pneumatic pump is strip-shaped, the outer shell and the inner cavity are respectively strip-shaped, the pneumatic pump is arranged along the axial extension of the inner cavity, and a peripheral interval is arranged between the inner side wall of the inner cavity and the periphery of the pneumatic pump.
5. The hydraulic tunnel deep shaft underground diaphragm wall side earth pressure gauge mounting construction method according to claim 3, wherein in the construction step 3), the front end of the pneumatic pump forms the front end of the pump, and the rear end of the pneumatic pump forms the rear end of the pump; The front end of the outer shell is provided with a front end plate, the rear end of the outer shell is provided with a rear end plate, the front end of the pump abuts against the front end plate, the piston shaft penetrates through the front end plate and extends out of the inner cavity, the rear end of the pump abuts against the rear end plate, the pump wire penetrates through the rear end plate and extends out of the inner cavity, and the front end plate and the rear end section axially clamp and fix the pneumatic pump.
6. The hydraulic tunnel deep shaft underground diaphragm wall side direction soil pressure gauge mounting construction method according to claim 3, wherein in the construction step 3), a plurality of circumferential clamping structures for circumferentially clamping and fixing the pneumatic pump are arranged in the inner cavity, and the plurality of circumferential clamping structures are arranged at intervals along the axial direction of the inner cavity; the circumferential clamping structure comprises a plurality of radial shafts, the radial shafts are circumferentially arranged along the circumferential space of the pneumatic pump, the outer ends of the radial shafts are fixedly connected to the inner side wall of the inner cavity to form fixed ends, and the inner ends of the radial shafts are abutted to the outer periphery of the pneumatic pump to form clamping ends.
7. The hydraulic tunnel deep shaft underground diaphragm wall side earth pressure gauge mounting construction method according to claim 6, wherein in the construction step 3), a plurality of elastic rings which elastically deform are arranged at the periphery of the pneumatic pump at intervals along the axial direction of the pneumatic pump, the inner side of the elastic rings is sleeved on the pneumatic pump and fixedly connected with the pneumatic pump, the outer sides of the elastic rings are concavely arranged to form annular grooves, and the annular grooves are arranged along the circumferential extension of the elastic rings; A plurality of concave positions are arranged in the groove ring, and the concave positions are circumferentially arranged along the circumferential direction of the elastic ring at intervals; the elastic ring is internally provided with elastic strips which are elastically deformed, and the elastic strips are arranged along the circumferential extension of the elastic ring; The elastic strip is provided with a plurality of bending sections, the bending sections are circumferentially arranged along the circumferential interval of the elastic strip, the bending sections are outwards convexly arranged along the radial direction of the elastic ring, the bending sections are enclosed to form elastic intervals, the middle part of the bending section forms a top part, the top part is exposed at the bottom of the concave position, and the clamping end is embedded in the concave position and is abutted against the top part; In the construction step 4), when the outer shell is impacted in the process of entering the groove, the clamping end of the radial shaft abuts against the bending section to elastically deform, the elastic interval is expanded or contracted and contracted, and the elastic ring synchronously elastically deforms.
8. The method for installing and constructing the hydraulic tunnel deep vertical shaft underground diaphragm wall side earth pressure gauge according to claim 2, wherein in the constructing step 3), the connecting plate is provided with an outward end face arranged towards the side wall of the groove and an inward end face arranged towards the pneumatic pump, a middle boss is convexly arranged in the middle of the inward end face, and the piston shaft is inserted into the middle boss and connected with the connecting plate; The lateral soil pressure gauge is in a sheet shape and is connected to the outward side face, and the periphery of the lateral soil pressure gauge is connected with a pressure gauge wire.
9. The hydraulic tunnel deep shaft underground diaphragm wall side direction soil pressure gauge mounting construction method according to claim 8, wherein in the construction step 3), a boss hole with an open outer end is arranged in the middle boss, a hemispherical positioning ball is convexly arranged at the bottom of the boss hole, a plurality of elastic constraint rings are arranged on the inner side wall of the boss hole, the constraint rings are arranged at intervals along the axial direction of the boss hole, and the constraint rings are circumferentially arranged along the boss hole; the end part of the piston shaft is recessed inwards to form a hemispherical positioning groove, the piston shaft is movably inserted into the boss hole, the positioning balls are movably embedded into the positioning groove, and the plurality of constraint rings are sleeved on the periphery of the piston shaft; In the construction step 4), in the process that the piston shaft drives the lateral soil pressure gauge to be abutted against the side wall of the groove, the piston shaft is automatically adjusted relative to the connecting plate, so that the lateral soil pressure gauge is in fit arrangement with the side wall surface of the groove.
10. The method for installing and constructing the hydraulic tunnel deep shaft underground diaphragm wall side earth pressure gauge according to claim 9, wherein in the constructing step 3), the inner side wall of the positioning groove is covered with an elastic layer, the elastic layer is abutted against the positioning ball, and in the constructing step 4), when the piston shaft is automatically adjusted relative to the connecting plate, the elastic layer is extruded and deformed.

Description

Method for installing and constructing side soil pressure gauge of underground diaphragm wall of hydraulic tunnel deep shaft Technical Field The invention relates to the technical field of safety monitoring, in particular to a method for installing and constructing a side earth pressure gauge of a hydraulic tunnel deep vertical shaft underground diaphragm wall. Background The side direction soil pressure gauge is used for measuring the side direction pressure change of a soil body to a structure, is commonly used for monitoring the long-term stress of structures such as an underground continuous wall, a soil-rock dam, a side slope and the like, can grasp the stress state of the structure in real time, ensures engineering safety, and is particularly important for accurately monitoring and evaluating the stability of tunnels and shafts because the underground continuous wall is used as an important supporting structure in the application of hydraulic tunnel deep shaft engineering. In the underground diaphragm wall construction, because the space is narrow and small in the underground diaphragm wall slot, and the buried depth of the lateral soil pressure gauge is great, constructors are difficult to directly install the lateral soil pressure gauge manually, even if the lateral soil pressure gauge can be placed manually, the lateral soil pressure gauge is difficult to accurately align the side wall of the slot, the reliability of monitoring data is affected, and the difficulty degree of installation is enough seen. In the prior art, the positions of a reinforcement cage and a lateral soil pressure gauge are usually determined in advance, the lateral soil pressure gauge is fixed on the reinforcement cage, the lateral soil pressure gauge is lifted to a designed position along with the reinforcement cage to measure the lateral soil pressure, however, a gap exists between the lateral soil pressure gauge and a soil body, after the reinforcement cage is lifted, concrete is filled between the lateral soil pressure gauge and the soil body, after the concrete is solidified, the soil pressure state is changed, data deviation is caused, and the lateral soil pressure data measured by the lateral soil pressure gauge cannot meet the accuracy requirement. Disclosure of Invention The invention aims to provide a method for installing and constructing a lateral soil pressure gauge of an underground diaphragm wall of a hydraulic tunnel deep shaft, and aims to solve the problem that the lateral soil pressure gauge is difficult to install in the prior art. The invention discloses a method for installing and constructing a side soil pressure gauge of an underground continuous wall of a hydraulic tunnel deep shaft, which comprises the following construction steps: 1) Digging in a construction site by adopting a trencher, and forming a trench with a set depth in the construction site, wherein two sides of the trench are respectively provided with a trench side wall; 2) Carrying out groove cleaning treatment on the groove; 3) A reinforcement cage is arranged in the groove, cage side parts are arranged on two sides of the reinforcement cage, and side part intervals are arranged between the cage side parts and the side walls of the groove; 4) When the reinforcement cage is lowered to a set depth in the groove and is fixed in the groove, the power pushing structure pushes the connecting plate to move towards the side wall of the groove until the lateral soil pressure gauge is abutted against the side wall of the groove; 5) And pouring concrete in the groove, wherein the reinforcement cage is wrapped in the concrete, the concrete is solidified to form the underground diaphragm wall, and the lateral soil pressure gauge is exposed at the side part of the underground diaphragm wall. Further, in the construction step 3), the power pushing structure comprises a pneumatic pump, the pneumatic pump is provided with a telescopic piston shaft, the piston shaft is connected with a connecting plate, and in the construction step 4), the pneumatic pump drives the piston shaft to extend towards the side wall of the groove and pushes the connecting plate to move towards the side wall of the groove until the lateral soil pressure gauge abuts against the side wall of the groove. In the construction step 3), an outer shell is sleeved outside the pneumatic pump, the outer shell is fixedly connected to the reinforcement cage and is arranged perpendicular to the side wall of the groove, a closed inner cavity is formed in the outer shell, the pneumatic pump is arranged in the inner cavity, and the piston shaft extends out of the inner cavity and is connected with the connecting plate. Further, in the construction step 3), the pneumatic pump is in a strip shape, the outer shell and the inner cavity are respectively in a strip shape, the pneumatic pump is arranged along the axial extension of the inner cavity, and a peripheral interval is arranged between the inne