CN-121977731-A - Long rod type sensor device of buttress type retaining wall and sensing method

CN121977731ACN 121977731 ACN121977731 ACN 121977731ACN-121977731-A

Abstract

The invention discloses a long rod type sensor device and a sensing method of a buttress type retaining wall, which relate to the technical field of instability monitoring of the buttress type retaining wall, wherein a long rod type sensing module comprises a long rod structure and a monitoring structure, the first end of the long rod structure is used for penetrating through the drain hole of the retaining wall, the second end of the long rod structure is used for being anchored to bedrock, and the long rod structure is used for converting the pressure born by the back side of the retaining wall into axial tension; the monitoring structure is sleeved at the first end of the long rod structure and can be attached to the wall surface side of the retaining wall, the monitoring structure is used for monitoring axial tension, the axial force guiding module is arranged at the wall back side of the retaining wall and used for providing an axial guiding channel for the long rod structure, and the processing module is connected with the monitoring structure in a signal mode and used for determining the stress state of the retaining wall according to monitoring information of the monitoring structure. Therefore, before macroscopic deformation displacement of the retaining wall does not occur, the interaction pressure between the soil body and the retaining wall is sensed, advanced sensing of the overturning risk of the retaining wall is achieved, and early warning can be conducted in advance.

Inventors

SUN HUAN
WANG YONGKANG
YE ZHENNI
Nong Chenghuan
CHEN FENGBO
DU KEREN
LI KAILEI
WANG JIE
ZHONG JINGYI

Assignees

海南大学

Dates

Publication Date: 20260505
Application Date: 20260312

Claims (10)

1. A long rod type sensor device of a buttress type retaining wall, comprising: The long rod type sensing module comprises a long rod structure (2) and a monitoring structure (1), wherein a first end of the long rod structure (2) is used for being arranged through a drain hole (101) of a retaining wall (10), a second end of the long rod structure (2) is used for being anchored to a bedrock (9), and the long rod structure (2) is used for converting pressure borne by a wall back side (S2) of the retaining wall (10) into axial tension; The monitoring structure (1) is sleeved at the first end of the long rod structure (2) and can be attached to the wall surface side (S1) of the retaining wall (10), and the monitoring structure (1) is used for monitoring the axial tension; The axial force guiding module (6) is arranged on the wall back side (S2) of the retaining wall (10) and is used for providing an axial guiding channel for the long rod structure (2); And the processing module (5) is in signal connection with the monitoring structure (1) and is used for determining the stress state of the retaining wall (10) according to the monitoring information of the monitoring structure (1).
2. The longrod-type sensor device of a buttress-type retaining wall according to claim 1, characterized in that said longrod structure (2) comprises a first longrod (21), a second longrod (22), one side of said first longrod (21) being able to protrude from said drain hole (101) and being adapted to house said monitoring structure (1), the other side of said first longrod (21) being connected to said second longrod (22), said second longrod (22) having a flexible portion (222), said flexible portion (222) being slidingly connected to said axial force guiding module (6).
3. The longrod-type sensor device of a buttress-type retaining wall according to claim 2, characterized in that said second longrod (22) further comprises a first fixed end (221) and a second fixed end (223) provided on both sides of said flexible portion (222), said first fixed end (221) and said first longrod (21) being coaxially arranged and both being able to pass through the drainage hole (101) of said retaining wall (10), said second fixed end (223) being inclined with respect to said first fixed end (221) and being intended to be anchored to said bedrock (9).
4. The longrod-type sensor device of a buttress-type retaining wall according to claim 2, characterized in that said longrod structure (2) comprises a fourth longrod (24), said fourth longrod (24) being adapted to be anchored to said bedrock (9) and to be provided in a seepage-guiding hole (242), said fourth longrod (24) being internally provided with a deep pore pressure monitoring unit in correspondence of the position of said seepage-guiding hole (242) for detecting the pore water pressure of the external rock-soil mass and being signally connected to said processing module (5).
5. The long rod type sensor device of the buttress type retaining wall according to claim 4, wherein the deep hole pressure monitoring unit comprises a sensor housing (17) and a first transmission cable (7), the sensor housing (17) is arranged at the middle position of the setting area of the seepage guide hole (242), a water pressure sensor is arranged in the sensor housing (17), and the water pressure sensor is connected with the processing module (5) through the first transmission cable (7).
6. The longrod sensor device of a buttress retaining wall according to claim 5, characterized in that one end of the fourth longrod (24) is adapted to be connected to the second longrod (22), the other end of the fourth longrod (24) being provided with an anchoring structure for anchoring to the bedrock (9), the outer side of the anchoring structure being provided with a pouring housing structure (243).
7. The longrod-type sensor device of a buttress-type retaining wall according to claim 6, characterized in that the outer diameter of said second longrod (22) is smaller than the inner diameter of said fourth longrod (24), and that a number of third longrods (23) for transitional connection are provided between said second longrod (22) and said fourth longrod (24).
8. A sensing method applied to the long rod type sensor device of the buttress type retaining wall of any one of claims 1 to 7, the sensing method comprising: acquiring axial tension information generated by corresponding lateral soil pressure under the action of multistage load based on the monitoring structure (1); Acquiring axial tension monitoring information generated by corresponding lateral soil pressure under the action of multistage load based on the monitoring structure (1) at the first end of the long rod structure (2); Acquiring pore water pressure monitoring information of an external rock-soil body based on a deep pore pressure monitoring unit corresponding to the second end of the long rod structure (2); Determining early warning level information based on the axial tension information and the pore water pressure information; Outputting a destabilization analysis report based on the determined early warning level information, and triggering an instant early warning signal of a corresponding level.
9. The sensing method of claim 8, wherein the determining pre-warning level information based on the axial tension information and the pore water pressure information comprises: determining the side load of the retaining wall based on the axial tension information; comparing the axial tension information with each preset tension threshold value to obtain a first comparison result of the axial tension information with each preset tension threshold value respectively; comparing the side load of the retaining wall with each preset load threshold value to obtain a second comparison result of the side load of the retaining wall with each preset load threshold value respectively; And determining the corresponding target early warning level information based on the first comparison result, the second comparison result and the pore water pressure information.
10. The sensing method according to claim 9, wherein said determining the corresponding target pre-warning level information based on the first comparison result, the second comparison result, and the pore water pressure information includes: when the first comparison result indicates that the axial tension information reaches a first preset tension threshold value, the second comparison result indicates that the side load of the retaining wall reaches a first preset load threshold value and the pore water pressure information indicates Kong Yashang liters, determining first early warning level information reflecting unsmooth drainage, increased pore pressure and first-stage fracture of a tooth sheet as the target early warning level information; Determining second early warning level information reflecting the increase of active soil pressure and the secondary fracture of the tooth plate as the target early warning level information when the first comparison result indicates that the axial tension information reaches a second preset tension threshold value, the second comparison result indicates that the side load of the retaining wall reaches a second preset load threshold value, and the pore water pressure information indicates that the pore pressure is stable; When the first comparison result indicates that the axial tension information reaches a third preset tension threshold, the second comparison result indicates that the side load of the retaining wall reaches a third preset load threshold, and the pore water pressure information indicates that pore pressure is stable, determining third early warning level information reflecting movement or rotation of the retaining wall and three-level fracture of a tooth plate as the target early warning level information; The monitoring structure (1) comprises a shaft force sensor (12), a calabash body structure (14) and a tooth plate structure (13) arranged between the shaft force sensor (12) and the calabash body structure (14), wherein the shaft force sensor (12) is used for monitoring axial tension, and the monitoring value of the shaft force sensor (12) corresponds to each level fracture threshold value of the tooth plate structure (13).

Description

Long rod type sensor device of buttress type retaining wall and sensing method Technical Field The invention relates to the technical field of destabilization monitoring of a buttress type retaining wall, in particular to a long rod type sensor device and a sensing method of the buttress type retaining wall. Background The buttress type retaining wall is an important type of engineering slope supporting structure, is easy to receive horizontal additional load from soil action, and side soil pressure caused by the horizontal additional load causes deformation and damage of the retaining wall structure, so that the health monitoring of the buttress type retaining wall structure is an important working content for guaranteeing the stability and safety of engineering slopes. In the similar technology of the same type, the surface displacement monitoring means represented by total stations and GNSS (Global Navigation SATELLITE SYSTEM ) are most widely applied and are mainly used for monitoring macroscopic surface deformation of the retaining wall, the technology generally takes wall deformation displacement as a measurement sensing target, engineering practice shows that obvious hysteresis exists in early warning through wall deformation displacement monitoring, and important content of early identification of stability risk of the retaining wall still needs to be considered by taking interaction pressure between a soil body and the retaining wall as a sensing target. In summary, how to sense the interaction pressure between the retaining wall and the soil is a problem to be solved by those skilled in the art. Disclosure of Invention Therefore, the invention aims to provide the long rod type sensor device of the buttress type retaining wall, which can sense the interaction pressure between the retaining wall and the soil body and can avoid the situation of monitoring and early warning hysteresis of the deformation displacement of the surface of the retaining wall. Another object of the present invention is to provide a sensing method of a long rod type sensor device applied to the above-mentioned buttress type retaining wall. In order to achieve the above object, the present invention provides the following technical solutions: A long rod type sensor device of a buttress type retaining wall, comprising: the long rod type sensing module comprises a long rod structure and a monitoring structure, wherein a first end of the long rod structure is used for penetrating through a drain hole of a retaining wall, a second end of the long rod structure is used for being anchored to bedrock, and the long rod structure is used for converting pressure born by the back side of the retaining wall into axial tension; The monitoring structure is sleeved at the first end of the long rod structure and can be attached to the wall surface side of the retaining wall, and the monitoring structure is used for monitoring the axial tension; the axial force guide module is arranged on the back side of the retaining wall and is used for providing an axial guide channel for the long rod structure; and the processing module is connected with the monitoring structure through signals and is used for determining the stress state of the retaining wall according to the monitoring information of the monitoring structure. Preferably, the long rod structure comprises a first long rod and a second long rod, one side of the first long rod can extend out of the drain hole and is used for sleeving the monitoring structure, the other side of the first long rod is connected with the second long rod, the second long rod is provided with a flexible part, and the flexible part is in sliding connection with the axial force guiding module. Preferably, the second long rod further comprises a first fixed end and a second fixed end which are arranged on two sides of the flexible portion, the first fixed end and the first long rod are coaxially arranged and can penetrate through the drain hole of the retaining wall, and the second fixed end is obliquely arranged relative to the first fixed end and is used for being anchored in bedrock. Preferably, the long rod structure comprises a fourth long rod, the fourth long rod is used for being anchored in the bedrock and arranged in a seepage diversion hole, a deep pore pressure monitoring unit is arranged in the fourth long rod at a position corresponding to the seepage diversion hole, and the deep pore pressure monitoring unit is used for detecting pore water pressure of an external rock-soil body and is connected with the processing module in a signal mode. Preferably, the deep pore pressure monitoring unit comprises a sensor housing and a first transmission cable, the sensor housing is arranged in the middle of the seepage diversion hole setting area, a pore water pressure sensor is arranged in the sensor housing, and the pore water pressure sensor is connected to the processing module through the first transmission ca