Field installation device of foundation pit slope deformation real-time monitoring system
The real-time monitoring system for foundation pit slope deformation without vertical drilling utilizes soil nailing wall reinforcement and pressure sensors to monitor pressure changes on the foundation pit slope. Combined with an automatic total station to monitor the translation of the soil nailing wall pouring layer, it solves the problem of vertical drilling affecting structural stability in existing technologies, and realizes real-time stability monitoring and timely detection of tilt deformation of foundation pit slope.
Patent Information
- Application Number
- CN202423308206.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing technologies require vertical drilling on the slope of the foundation pit for monitoring, which affects structural stability.
A real-time monitoring system for foundation pit slope deformation without vertical drilling is adopted. The system uses soil nailing wall reinforcement and pressure sensors to sense the pressure changes between the vertical plate and the inner wall of the foundation pit slope. It combines an automatic total station to monitor the translation of the soil nailing wall pouring layer. The controller integrates the pressure sensor and total station data to achieve real-time monitoring.
It enables real-time monitoring of the structural stability of the foundation pit slope, avoids the impact of vertical drilling on the structure, and promptly detects the risk of tilting deformation.
Smart Images
Figure CN223663983U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of foundation pit construction management, especially to the on-site installation device of foundation pit slope deformation real-time monitoring system. BACKGROUND
[0002] In the foundation pit construction, the operator first digs out the foundation pit body on the flat ground, keeps a circle of unexcavated part around the foundation pit body as the foundation pit slope, punches the front part of the soil nailing wall steel bar into the foundation pit slope from the inner side wall of the foundation pit slope, leaves the rear part of the soil nailing wall steel bar outside the side wall of the soil nailing wall pouring layer, and then pours the soil nailing wall pouring layer on the foundation pit slope. The operator lays the anti-falling plate on the rear part of the soil nailing wall steel bar, and preliminarily completes the foundation pit structure construction. On this basis, it is also necessary to install a monitoring system to monitor the structural stability of the foundation pit slope. Specifically, a plurality of inclinometers are installed at different depths in the vertical hole drilled on the foundation pit slope and the soil nailing wall pouring layer, and the inclinometers monitor whether the foundation pit slope appears structural inclination deformation phenomenon. Since the installation of the inclinometers needs to perform vertical drilling on the foundation pit slope, it will affect the structural stability of the foundation pit slope. SUMMARY
[0003] The utility model aims at giving the on-site installation device of foundation pit slope deformation real-time monitoring system, which can monitor whether the foundation pit slope appears structural inclination deformation phenomenon without vertical drilling on the foundation pit slope.
[0004] The on-site installation device of foundation pit slope deformation real-time monitoring system comprises a soil nailing wall steel bar, the front part of which is punched into the foundation pit slope from the inner side of the foundation pit slope, the rear part of which is exposed to the side wall of the soil nailing wall pouring layer, the bottom wall of the rear part of the soil nailing wall steel bar is provided with a vertical plate, the vertical plate faces away from the inner side wall of the foundation pit slope, the back of the vertical plate is provided with an upper pressure sensor and a lower pressure sensor, and the back of the two pressure sensors tightly abuts the side wall of the soil nailing wall pouring layer to respectively sense the upper pressure and the lower pressure between the vertical plate and the side wall of the soil nailing wall pouring layer.
[0005] Further, the top wall of the rear part of the soil nailing wall steel bar is provided with an anti-falling plate which is inclined upward and inward.
[0006] Further, the top wall of the anti-falling plate is provided with a convex column, and the device comprises an automatic total station and a side-mounted reflective prism, the side-mounted reflective prism is mounted on the convex column, the automatic total station is mounted on the top wall of the soil nailing wall pouring layer, and the automatic total station monitors the side-mounted reflective prisms.
[0007] Further, the soil nailing wall steel bar has a plurality of parts which are arranged along the width direction of the foundation pit slope.
[0008] Further, the device comprises a plurality of top-mounted reflective prisms which are arranged along the width direction of the top wall of the soil nailing wall pouring layer and are mounted on the top wall of the soil nailing wall pouring layer, and the automatic total station monitors the top-mounted reflective prisms.
[0009] Furthermore, it includes a controller, which is connected to the automatic total station and the two pressure sensors respectively.
[0010] This utility model discloses a field installation device for a real-time monitoring system of foundation pit slope deformation. It utilizes the existing steel reinforcement of the soil nailing wall for installation, eliminating the need for vertical drilling on the soil nailing wall foundation pit slope and thus not affecting the structural stability of the foundation pit slope. Pressure sensors detect the upper and lower pressures between the vertical plate and the inner wall of the foundation pit slope. If the two pressure values are essentially constant, it means that the inclination angle of the corresponding soil nailing wall reinforcement has not changed, and the foundation pit slope has not experienced structural tilting deformation. If the two pressure values change, for example, the lower pressure sensor detects an increase in pressure while the upper pressure sensor detects a decrease in pressure, this means that the rear of the soil nailing wall reinforcement has sunk while the front has tilted, indicating a risk of structural tilting deformation inside the foundation pit slope, requiring thorough inspection and maintenance by operators. Attached Figure Description
[0011] Figure 1 It is a top view of the foundation pit, and the anti-fall plate is only drawn at point C (3);
[0012] Figure 2 yes Figure 1 A 3D view at point C;
[0013] Figure 3 yes Figure 2 A-direction cross-section view;
[0014] In the diagram: 1. Excavation pit body; 2. Top wall of the poured layer; 3. Fall arrestor plate; 4. Excavation pit slope; 8. Automatic total station; 10. Protruding column; 11. Top-mounted reflective prism; 12. Pressure sensor; 13. Soil nail wall reinforcement; 14. Vertical plate; 15. Side wall of the poured layer. Detailed Implementation
[0015] The present invention will be further described in detail below with reference to specific embodiments.
[0016] like Figure 1 As shown, a square foundation pit 1 is excavated on a leveled surface, with an unexcavated foundation pit slope 4 surrounding the pit 1. The operators prepare multiple soil nailing wall steel bars 13, and drive each steel bar 13 into the foundation pit slope 4 one by one, starting from the inner wall and moving diagonally downwards towards the outer side, arranging the steel bars 13 along the width of the foundation pit slope 4. Figure 3As shown, the rear of the soil nailing wall reinforcement 13 remains outside the side wall 15 of the soil nailing wall pouring layer. Workers pour concrete on the top and inner walls of the foundation pit slope 4 to form the pouring layer. A vertical plate 14 is installed on the bottom wall of the rear of the soil nailing wall reinforcement 13. The back of the vertical plate 14 faces the inner wall of the foundation pit slope 4. Two pressure sensors 12, one above the other, are installed on the back of the vertical plate 14. These pressure sensors 12 are pressed tightly against the side wall 15 of the soil nailing wall pouring layer to sense the upper and lower pressures between the vertical plate 14 and the side wall 15. If the two pressure values are found to be essentially constant, it means the pressure is normal, and the tilt angle of the soil nailing wall reinforcement 13 has not changed. Therefore, the foundation pit slope 4 has not experienced structural tilting or deformation. If two abnormal pressure values are detected, such as the lower pressure sensor 12 detecting an increase in pressure while the upper pressure sensor 12 detects a decrease in pressure, this means that the rear of the soil nail wall reinforcement 13 sinks while the front of it rises. In this case, there is a risk of structural tilting and deformation inside the foundation pit slope 4, requiring inspection personnel to conduct in-depth inspection.
[0017] like Figure 1 As shown, four automatic total stations 8 are installed at the four corners of the top wall 2 of the soil nailing wall layer. Multiple top-mounted reflecting prisms 11 are installed at the remaining locations on the top wall 2. These top-mounted reflecting prisms 11 are arranged in four groups along the width of the top wall 2. The four automatic total stations 8 monitor the angles and distances of the four groups of top-mounted reflecting prisms 11 to monitor whether surface displacement occurs on the top wall 2. Figure 2 and Figure 3 As shown, an upward-facing, inward-facing fall arrestor plate 3 is installed on the top wall of the rear of the soil nailing wall reinforcement 13. A protruding column 10 is mounted on the top wall of the fall arrestor plate 3, and a side-mounted reflecting prism (not shown in the figure) is mounted on the protruding column 10. A controller (not shown in the figure) is installed on the soil nailing wall pouring layer, and the controller is connected to these automatic total stations 8 and the multiple pressure sensors 12. If a pair of pressure sensors 12 detects an abnormal pressure value, the controller controls the automatic total station 8 to rotate horizontally to align with the side-mounted reflecting prism corresponding to that pressure sensor 12. Only when the automatic total station 8 detects that the angle and distance data between itself and the side-mounted reflecting prism are indeed different from the previous data will it issue an alarm to the maintenance personnel to avoid false alarms from the pressure sensors 12.
[0018] The above description is merely an embodiment of this utility model and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on this utility model will still fall within the scope of patent protection.
Claims
1. A field installation device for a real-time monitoring system for foundation pit slope deformation, comprising soil nailing wall reinforcement, the front part of which is driven diagonally downwards and outwards into the foundation pit slope, and the rear part protruding outside the sidewall of the soil nailing wall pouring layer, characterized in that: The bottom wall behind the soil nailing wall reinforcement is equipped with a vertical plate, with the back of the vertical plate facing the inner side wall of the foundation pit slope. Two pressure sensors, one above and one below, are installed on the back of the vertical plate. The backs of these two pressure sensors are in close contact with the side wall of the soil nailing wall pouring layer, so as to sense the upper and lower pressures between the vertical plate and the side wall of the soil nailing wall pouring layer, respectively.
2. The field installation device for the real-time monitoring system for foundation pit slope deformation as described in claim 1, characterized in that: The top wall behind the steel reinforcement of the soil nailing wall is equipped with an upward-facing anti-fall plate.
3. The field installation device for the real-time monitoring system for foundation pit slope deformation as described in claim 2, characterized in that: The top wall of the fall arrestor is equipped with protruding columns; including an automatic total station and side-mounted reflecting prisms. The side-mounted reflecting prisms are mounted on the protruding columns, and the automatic total station is mounted on the top wall of the soil nailing wall pouring layer. The automatic total station monitors these side-mounted reflecting prisms.
4. The field installation device for the real-time monitoring system for foundation pit slope deformation as described in claim 3, characterized in that: The soil nailing wall has multiple reinforcing bars, which are arranged along the width of the foundation pit slope.
5. The field installation device for the real-time monitoring system for foundation pit slope deformation as described in claim 3, characterized in that: It includes multiple top-mounted reflecting prisms, which are mounted on the top wall of the soil nailing wall and arranged along the width of the top wall of the soil nailing wall; the automatic total station monitors these top-mounted reflecting prisms.
6. The field installation device for the real-time monitoring system for foundation pit slope deformation as described in claim 5, characterized in that: It includes a controller, which is connected to the automatic total station and the two pressure sensors respectively.