Automatic monitoring device for deformation of deep foundation pit

Abstract

The utility model discloses an automatic monitoring device for deformation of a deep foundation pit. The automatic monitoring device is composed of a plurality of monitoring black boxes arranged on the wall of the foundation pit. Each monitoring black box comprises a black box body and a laser monitoring mechanism; the laser monitoring mechanism is arranged in an optically dense cavity formed by the black box body and comprises a hard probe, a laser transmitter, a light activated switch, a reflecting mirror and a warning lamp; the hard probe is freely placed in the wall of a foundation pit, the front end of the hard probe is fixedly connected with the laser transmitter, laser beams transmitted by the laser transmitter are reflected by the reflector and then projected to the light activated switch, and the light activated switch is in signal connection with the warning lamp arranged outside the black box body. The device is powered by an external power supply or fully utilizing a foundation pit self-generating device. Through the arrangement of the black box, the laser transmitter, the warning lamp and other structures, the hard probe drives the laser transmitter to deviate when the inner wall of the deep foundation pit deforms, the warning lamp is triggered to flash and give an alarm, emergency situations are prevented, and the hard probe and the laser are sensitive, instant and reliable in strain.

Description

Technical Field

[0001] The utility model belongs to the technical field of monitoring design, relates to the technical field of deep foundation pit monitoring, and specifically relates to an automatic monitoring device for deep foundation pit deformation. Background Art

[0002] A deep foundation pit refers to an excavation project with an excavation depth exceeding 5 meters (including 5 meters), or a foundation pit excavation project with a depth not exceeding 5 meters but with particularly complex geological conditions, surrounding environment and underground pipelines.

[0003] In the prior art, during the construction and excavation of a deep foundation pit, if unloading occurs during the excavation in the pit, the retaining structure may easily cause deformation of the outer soil under the action of the internal and external pressure difference, causing settlement and movement of the foundation pit soil or buildings. If it is not detected, it may cause the foundation pit to become unstable over time, and then cause a safety accident. Therefore, an automatic monitoring device for deep foundation pit deformation is needed to meet people's needs. Summary of the invention

[0004] The utility model aims to provide an automatic monitoring device for deep foundation pit deformation, so as to realize instant detection of foundation pit deformation during foundation pit excavation engineering and avoid the occurrence of safety accidents.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The automatic monitoring device for deep foundation pit deformation is characterized by: comprising a plurality of monitoring black boxes arranged on the foundation pit wall; each monitoring black box comprises: a black box body and a laser monitoring mechanism;

[0007] The black box body is a light-tight box with one opening, and the opening is fixed to the wall of the foundation pit by bolts to form a sealed cavity;

[0008] The laser monitoring mechanism is arranged in the light-tight cavity formed by the black box body, including a hard probe, a laser emitter, a photosensitive switch, a reflector and a warning light; the hard probe is freely placed in the wall of the foundation pit, and the front end of the hard probe is fixedly connected to the laser emitter. The laser beam emitted by the laser emitter is reflected by the reflector and projected onto the photosensitive switch, and the photosensitive switch is connected to the warning light signal arranged outside the black box body.

[0009] Furthermore, the hard probe is movably suspended by a fixing rod and a spherical connecting rod fixed on the black box body; one end of the fixing rod is fixed to the black box body, and the other end is provided with a spherical connecting rod; the spherical connecting rod is connected to the hard probe.

[0010] Furthermore, a spherical groove is provided on the inner wall of the end of the fixing rod, and the end of the spherical connecting rod is movably installed in the spherical groove.

[0011] Furthermore, the photosensitive switch is fixedly arranged on a fixing seat, and the fixing seat is fixed on the wall of the black box body.

[0012] The laser monitoring mechanism of the utility model is powered by an external power source or a foundation pit self-generating device.

[0013] Furthermore, the foundation pit self-generating device includes a submersible pump, a well pipe and a generator. The submersible pump is arranged in the foundation pit for pumping out water collected in the foundation pit. The generator is fixed to the foundation pit wall through a support frame. The impeller blades directly connected to the front end of the engine are located in the water outlet pipe of the submersible pump and are driven.

[0014] Furthermore, the submersible pump outlet pipe has a connecting box with a cavity structure arranged along the axial tangent of the water pipe, the runner blades are located in the connecting box, and the driving water-facing surface of the runner blades is located in the axial water flow direction of the outlet pipe.

[0015] Furthermore, each monitoring black box is provided with a corresponding self-generating device.

[0016] Furthermore, the interval between adjacent monitoring black boxes is 2m.

[0017] The beneficial effects of the utility model are:

[0018] The utility model arranges the black box at intervals on the inner wall of the deep foundation pit through the arrangement of structures such as the black box, the laser transmitter, and the warning light. Under normal conditions, the laser emitted by the laser transmitter in the black box can be reflected by the mirror and irradiate the photosensitive switch. At this time, the warning light is in an off state. When the inner wall of the deep foundation pit is deformed, the hard probe will cause the laser transmitter to deviate. At the same time, the photosensitive switch will no longer sense the laser irradiated by the laser transmitter, and the warning light will be triggered to flash, alerting the surrounding staff to prevent the occurrence of emergencies. The hard probe and laser transmission strain are sensitive, immediate, and reliable.

[0019] The utility model can make full use of the existing dewatering device of the deep foundation pit. Through the setting of the generator, when the submersible electric pump is pumping water, the water flow through the connecting box will drive the impeller blades to rotate, and the impeller blades will drive the output shaft of the generator to rotate, so that the generator generates electricity. The laser transmitter, the photosensitive switch and the warning light can all be powered by the electricity generated by the submersible electric pump when pumping water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the monitoring device of the utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the connecting box portion of the monitoring device of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the black box of the monitoring device of the utility model;

[0023] Figure 4It is a schematic diagram of the cross-sectional structure of the black box part of the monitoring device of the utility model.

[0024] In the figure: 100, deep foundation pit; 101, submersible pump; 200, black box body; 201, fixing rod; 202, spherical connecting rod; 203, hard probe; 204, laser transmitter; 205, fixing seat; 206, photosensitive switch; 207, reflector; 208, warning light; 209, spherical groove; 300, well pipe; 301, connecting box; 302, supporting frame; 303, generator; 304, runner blades. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies identical or similar to the present invention do not exceed the scope of protection of the present invention.

[0026] Combined with the attached pictures.

[0027] Reference Figures 1 to 4 The automatic monitoring device for deformation of a deep foundation pit of an embodiment of the utility model comprises a deep foundation pit 100 and a submersible electric pump 101. A plurality of black box bodies 200 are fixedly installed on one side of the deep foundation pit 100. A fixing rod 201 is fixedly installed on the inner wall of the top side of the black box body 200. A spherical connecting rod 202 is movably installed on the fixing rod 201. A hard probe 203 is fixedly installed on one end of the spherical connecting rod 202. One end of the hard probe 203 is movably installed in the deep foundation pit 100. A laser transmitter 204 is fixedly installed on the other end of the hard probe 203. A fixing seat 205 is fixedly installed on the inner wall of the black box 200. A photosensitive switch 206 is fixedly installed on the fixing seat 205. A reflector 207 is fixedly installed on the inner wall of the black box 200. A warning light 208 is fixedly installed on the fixing seat 205. The warning light 208 is electrically installed on the photosensitive switch 206.

[0028] A well pipe 300 is fixedly installed on the submersible pump 101, and a plurality of connecting boxes 301 are fixedly installed on the well pipe 300. A plurality of supporting frames 302 are fixedly installed on one side of the deep foundation pit 100, and a generator 303 is fixedly installed on the top side of the supporting frame 302. The laser transmitter 204 and the photosensitive switch 206 are both electrically installed on the generator 303. The output end of the generator 303 passes through the connecting box 301 and is fixedly installed with a runner blade 304. The runner blade 304 is rotatably installed in the connecting box 301. The connecting box 301 is connected to the well pipe 300. Connectivity: Well pipes 300 deeper than the base are usually buried around the deep foundation pit 100. The groundwater is pumped out by the submersible pump 101 to make the groundwater lower than the bottom of the foundation pit. During the pumping process of the submersible pump 101, water will flow through the connecting box 301. Driven by the water flow, the impeller blades 304 in the connecting box 301 will rotate. The rotating impeller blades 304 will drive the output shaft of the generator 303 to rotate, so that the generator 303 generates electricity, which can supply power to the laser transmitter 204, the photosensitive switch 206 and the warning light 208.

[0029] When the black box body 200 is installed, it is necessary to adjust the angle of the laser emitter 204 so that the laser beam emitted by the laser emitter 204 can be exactly located at the photosensitive switch 206 after being reflected by the reflector 207, and one end of the hard probe 203 is inserted into the deep foundation pit 100. At this time, the warning light 208 is in the off state, and a black box body 200 is set every 2m to increase the monitoring range. When the deep foundation pit 100 is deformed, the angle of the hard probe 203 inserted therein will change, so that the hard probe 203 drives the position of the laser emitter 204 to shift. At the same time, the laser beam emitted by the laser emitter 204 will also be separated from the photosensitive switch 206 after being reflected by the reflector 207. The photosensitive switch 206 no longer senses the laser irradiation, and the warning light 208 can be triggered at this time, so that the warning light 208 is connected to the current and generates light to alert the surrounding staff.

[0030] In this example, a spherical groove 209 is provided on the inner wall of the fixing rod 201, and the spherical connecting rod 202 is movably installed in the spherical groove 209. By moving the hard probe 203, it drives the spherical connecting rod 202 to rotate in the spherical groove 209 on the fixing rod 201, and 360-degree adjustment can be achieved.

[0031] In this example, two adjacent black box bodies 200 are spaced 2 m apart, and a black box body 200 is disposed every 2 m in the deep foundation pit 100 to increase the monitoring range.

[0032] In this example, the laser emitter 204 corresponds to the reflector 207 , and the photosensitive switch 206 corresponds to the reflector 207 . The laser emitted by the laser emitter 204 can be exactly located at the photosensitive switch 206 after being reflected by the reflector 207 .

[0033] Working principle of this utility model:

[0034] A well pipe 300 deeper than the base is usually buried around the deep foundation pit 100. The groundwater is pumped out by the submersible electric pump 101 so that the groundwater is lower than the bottom of the foundation pit. During the pumping process of the submersible electric pump 101, water will flow through the connecting box 301. Driven by the water flow, the runner blades 304 in the connecting box 301 will rotate. The rotating runner blades 304 will drive the output shaft of the generator 303 to rotate, so that the generator 303 generates electricity, which can supply power to the laser transmitter 204, the photosensitive switch 206 and the warning light 208. When installing the black box body 200, it is necessary to adjust the angle of the laser transmitter 204. The hard probe 203 can be moved to drive the spherical connecting rod 202 to rotate in the spherical groove 209 on the fixed rod 201, and 360-degree adjustment can be achieved, so that the laser beam emitted by the laser transmitter 204 can be exactly located at the photosensitive switch 206 after being reflected by the reflector 207. One end of the hard probe 203 is inserted into the deep foundation pit 100. At this time, the warning light 208 is in the off state, and a black box body 200 is set every 2m to increase the monitoring range. When the deep foundation pit 100 is deformed, the angle of the hard probe 203 inserted therein will change, so that the hard probe 203 drives the position of the laser emitter 204 to shift. At the same time, the laser beam emitted by the laser emitter 204 will also be separated from the photosensitive switch 206 after being reflected by the reflector 207. The photosensitive switch 206 no longer senses the laser irradiation, and the warning light 208 can be triggered at this time, so that the warning light 208 is connected to the current and generates light to alert the surrounding staff.

Claims

1. Automatic monitoring device for deep foundation pit deformation, characterized by: It is composed of a plurality of monitoring black boxes arranged on the foundation pit wall; each monitoring black box comprises: a black box body and a laser monitoring mechanism; The black box body is a light-tight box with one opening, and the opening is fixed to the wall of the foundation pit by bolts to form a sealed cavity; The laser monitoring mechanism is arranged in the light-tight cavity formed by the black box body, including a hard probe, a laser emitter, a photosensitive switch, a reflector and a warning light; the hard probe is freely placed in the wall of the foundation pit, and the front end of the hard probe is fixedly connected to the laser emitter. The laser beam emitted by the laser emitter is reflected by the reflector and projected onto the photosensitive switch, and the photosensitive switch is connected to the warning light signal arranged outside the black box body.

2. The deep foundation pit deformation automatic monitoring device according to claim 1 is characterized in that: The hard probe is movably suspended by a fixing rod and a spherical connecting rod fixed on the black box body; one end of the fixing rod is fixed to the black box body, and the other end is provided with a spherical connecting rod; the spherical connecting rod is connected to the hard probe.

3. The deep foundation pit deformation automatic monitoring device according to claim 2 is characterized by: A spherical groove is provided on the inner wall of the end of the fixing rod, and the end of the spherical connecting rod is movably installed in the spherical groove.

4. The deep foundation pit deformation automatic monitoring device according to claim 2 is characterized in that: The photosensitive switch is fixedly arranged on a fixing seat, and the fixing seat is fixed on the wall of the black box body.

5. The automatic monitoring device for deep foundation pit deformation according to any one of claims 1 to 4, characterized in that: The laser monitoring mechanism is powered by an external power source or a foundation pit self-generating device.

6. The deep foundation pit deformation automatic monitoring device according to claim 5 is characterized by: The foundation pit self-generating device includes a submersible pump, a well pipe and a generator. The submersible pump is arranged in the foundation pit for pumping out water collected in the foundation pit. The generator is fixed to the wall of the foundation pit through a support frame. The impeller blades directly connected to the front end of the engine are located in the water outlet pipe of the submersible pump and are driven.

7. The deep foundation pit deformation automatic monitoring device according to claim 6 is characterized by: The submersible pump outlet pipe has a connecting box with a cavity structure arranged along the axial tangent of the water pipe, the runner blades are located in the connecting box, and the driving water-facing surface of the runner blades is located in the axial water flow direction of the outlet pipe.

8. The automatic monitoring device for deep foundation pit deformation according to claim 7 is characterized in that: Each monitoring black box is equipped with a corresponding self-generating device.

9. The automatic monitoring device for deep foundation pit deformation according to claim 8 is characterized in that: The interval between adjacent monitoring black boxes is 2m.

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