CN204286365U - Foundation pit side wall displacement monitoring device - Google Patents

Abstract

The utility model discloses a foundation pit side wall displacement monitoring device, comprising: a support frame, a base placed on the support frame, a vertical frame installed on the base through a first rotating shaft, a horizontal frame installed on the vertical frame through a second rotating shaft, and a laser rangefinder fixed on the horizontal frame; the vertical frame can rotate around the first rotating shaft, and the horizontal frame can rotate around the second rotating shaft; the axis of the first rotating shaft is perpendicular to the axis of the second rotating shaft; the utility model can quickly and simultaneously judge the deformation of multiple parts of the foundation pit, which is helpful to analyze the stress characteristics and deformation trend of the foundation pit, and further conducive to better safety assessment of the foundation pit.

Description

Foundation pit side wall displacement monitoring device

technical field

The utility model relates to a displacement monitoring device for the side wall of a foundation pit.

Background technique

Foundation pit refers to the foundation space below the ground excavated for the construction of building foundation and basement. It is a typical geotechnical engineering structure, which is quite common in civil construction and traffic engineering; complex process of body excavation and reinforcement. Under normal circumstances, the instability and collapse of foundation pits are mainly manifested as the continuous increase of side wall deformation and damage. Therefore, monitoring the displacement of foundation pit side walls during construction plays a vital role in ensuring safety. In the prior art, the monitoring method for the displacement of the side wall of the foundation pit mainly uses an inclinometer. When installing the inclinometer pipe, the inclinometer process cannot be carried out because the soil body cannot form a hole or the inclinometer pipe is blocked; in the prior art, a total station is used as a monitoring method for the displacement of the side wall of the foundation pit, and the equipment is expensive and time-consuming to monitor. Inconvenient; How to provide a foundation pit side wall displacement monitoring device with wide application range, low cost and easy to use, there is no effective solution in the prior art.

Contents of the invention

Aiming at the above problems, the utility model develops a flexible and low-cost foundation pit side wall displacement monitoring device.

The technical scheme of the utility model is:

A device for monitoring the displacement of the side wall of a foundation pit, comprising: a support frame, a base placed on the support frame, a vertical frame mounted on the base through a first rotating shaft, and a vertical frame mounted on the vertical frame through a second rotating shaft. The horizontal frame on the frame and the laser rangefinder fixed on the horizontal frame; the vertical frame can rotate around the first rotating shaft, and the horizontal frame can rotate around the second rotating shaft; the axis of the first rotating shaft perpendicular to the axis of the second rotating shaft;

Further, a circular dial centered on the axis of the vertical frame is arranged on the base;

Further, fan-shaped dials are symmetrically arranged on the upper and lower sides of the horizontal horizontal frame;

Further, the support frame includes a rectangular bottom frame and four uprights vertically connected to the plane of the bottom frame; the upper ends of the uprights are connected to the base.

Due to the adoption of the above technical scheme, the utility model provides a monitoring device for the displacement of the side wall of the foundation pit. The utility model is flexible in movement, low in cost, simple in operation, and easy to carry. Complicated operations such as drilling or pre-embedding in the retaining pile to install the inclinometer tube; through the rotation of the horizontal frame in the vertical direction and the circumferential rotation of the vertical frame on the horizontal plane, the large The range of measuring point monitoring is especially suitable for the deformation of the short side of the foundation pit and the horizontal deformation of the deep part of the side wall; the utility model has a wide application range and can quickly and simultaneously make judgments on the deformation of multiple parts of the foundation pit, which is helpful for the analysis of the foundation pit The stress characteristics and deformation trend are conducive to better foundation pit safety assessment.

Description of drawings

Fig. 1 is the structural representation of displacement monitoring device described in the utility model;

Fig. 2 is a schematic diagram of a station platform for positioning the displacement monitoring device described in the present invention;

Fig. 3 is a schematic diagram of the use of the displacement monitoring device of the present invention.

In the figure: 1. Support frame, 2. Base, 3. First shaft, 4. Vertical frame, 5. Second shaft, 6. Horizontal frame, 7. Laser range finder, 8. Circular dial, 9. Fan-shaped dial, 10. Locking bolt, 11. Bottom frame, 12. Column, 13. Positioning boundary line, 14. Station platform, 15. Positioning point, 16. Reflector, 17. Concrete wall, 18. Surrounding bollard.

Detailed ways

A foundation pit side wall displacement monitoring device as shown in Figure 1, comprising: a support frame 1, a base 2 placed on the support frame 1, a vertical frame mounted on the base 2 through a first rotating shaft 3 4. The horizontal frame 6 installed on the vertical frame 4 through the second rotating shaft 5, and the laser rangefinder 7 fixed on the horizontal frame 6; the vertical frame 4 can rotate around the first rotating shaft 3 , the horizontal frame 6 can rotate around the second shaft 5; the axis of the first shaft 3 is perpendicular to the axis of the second shaft 5; further, the base 2 is arranged with a vertical frame 4 axis a circular dial 8 at the center; further, fan-shaped dials 9 are symmetrically arranged on the upper and lower sides of the horizontally placed horizontal frame 6; further, the support frame 1 includes a rectangular bottom frame 11 and 4 bottom frames 11 vertically connected columns 12; the upper end of the column 12 is connected to the base 2; the circular dial 8 is used to determine the position of the vertical frame 4 after rotating around the first rotating shaft 3; the fan-shaped scale The disc 9 is used to determine the position of the horizontal frame 6 after rotating around the second rotating shaft 5; the horizontal frame 6 and the vertical frame 4 can be rotated according to the position of the measuring point, and after the position is determined, the horizontal frame 6 and the vertical frame are fixed 4, and then measure the distance.

When utilizing the displacement monitoring device described in the present invention to monitor the displacement of the side wall of the base station, the station position of the foundation pit is first set, and Fig. 2 shows a schematic diagram of the station platform 14 for positioning the displacement monitoring device described in the present invention, The station platform 14 is made of concrete to a standard size, placed on the retaining pile 18 of the foundation pit, and the positioning boundary line 13 is marked, the edge of the supporting frame 1 is coincident with the positioning boundary line 13, and the positioning point is determined by positioning with a weight 15, thereby ensuring that the position of the support frame 1 remains unchanged during each monitoring.

As shown in Figure 3, specifically, the displacement monitoring device described in the utility model is used according to the following working steps:

1. First, on the concrete wall 17 on one side of the foundation pit, build the measuring station platform 14 shown in FIG. 2 at regular intervals, and mark the positioning boundary line 13;

2. During each monitoring, the edge of the support frame 1 of the displacement monitoring device coincides with the positioning boundary line 13, and the weight is used for positioning to ensure that the position of the base 2 remains unchanged each time;

3. Turn the horizontal frame 6 according to the position of the measuring point to realize vertical adjustment up and down, and realize positioning through the scale arranged on the fan-shaped dial 9 (when the horizontal frame 6 rotates downward, the fan-shaped dial on the lower side is used for positioning, when When the horizontal frame 6 rotates upwards, the fan-shaped dial on the upper side is used for positioning), and then the position of the horizontal frame 6 is fixed, specifically the horizontal frame 6 can be fixed to the vertical frame 4 by locking bolts 10;

4. Rotate the vertical frame 4 to realize its circumferential adjustment on the horizontal plane, realize angular positioning through the scale arranged on the circular dial 8, and then fix the position of the vertical frame 4. Specifically, the vertical frame can be locked by locking the bolt 10. The frame 4 is fixed on the base 2;

5. After the position of the measuring point is determined, the laser rangefinder 7 is aligned with the reflective sheet 16 of the measuring point to measure the distance;

6. Find another measuring point, repeat 3 to 5, until all the measuring points in the range are measured;

7. Find the next station location, repeat steps 2 to 6 until all station locations are monitored, then the monitoring of foundation pit side wall displacement in this cycle ends.

The utility model has the advantages of flexible movement, low cost, simple operation, and convenient portability. It does not need complicated operations such as drilling holes in the soil layer or pre-buried in the surrounding protection piles to install inclinometer pipes to complete the displacement monitoring work of the side wall of the foundation pit. ;Through the rotation of the horizontal frame in the vertical direction and the circumferential rotation of the vertical frame on the horizontal plane, a wide range of measuring points can be monitored by the laser rangefinder, especially suitable for the deformation of the short side of the foundation pit and the depth of the side wall Horizontal deformation: the utility model has a wide range of applications, can quickly and simultaneously judge the deformation of multiple parts of the foundation pit, and is helpful for analyzing the force characteristics and deformation trends of the foundation pit, which in turn is conducive to better safety assessment of the foundation pit.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and its inventive concept shall be covered by the protection scope of the present utility model.

Claims (4)

1. a foundation pit side-wall displacement monitor, is characterized in that comprising: support frame, the pedestal be placed on described support frame, the vertical frame be arranged on by the first rotating shaft on pedestal, the laser range finder that is arranged on the transverse strands on described vertical frame by the second rotating shaft and is fixed in described transverse strands; Described vertical frame can around the first axis of rotation, and described transverse strands can around the second axis of rotation; The axis of described first rotating shaft and the axes normal of described second rotating shaft.

2. foundation pit side-wall displacement monitor according to claim 1, is characterized in that described pedestal being laid with the circular scale centered by vertical frame axis.

3. foundation pit side-wall displacement monitor according to claim 1, is characterized in that the upper and lower symmetria bilateralis of the transverse strands of horizontal positioned is provided with fan dial.

4. foundation pit side-wall displacement monitor according to claim 1, is characterized in that described support frame comprises a rectangle underframe and 4 columns be connected with underframe plane orthogonal; Described column upper end connects described pedestal.