CN214470751U - Hydraulic monitoring device for vertical displacement of ground surface around foundation pit - Google Patents
Hydraulic monitoring device for vertical displacement of ground surface around foundation pit Download PDFInfo
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- CN214470751U CN214470751U CN202023323884.4U CN202023323884U CN214470751U CN 214470751 U CN214470751 U CN 214470751U CN 202023323884 U CN202023323884 U CN 202023323884U CN 214470751 U CN214470751 U CN 214470751U
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Abstract
The utility model provides a vertical displacement hydraulic monitoring device in peripheral earth's surface of foundation ditch, including multistage formula hydraulic system and wireless transmission system, the earth's surface at monitoring section position carries out the operation of slotting in order to obtain the monitoring point recess, multistage formula hydraulic system's tail end is arranged in the monitoring point recess, in order to ensure that the monitoring point all is located the monitoring point recess, the multistage formula hydraulic system who is located different monitoring point recesses links to each other with wireless transmission system respectively, utilize wireless transmission system to gather initial monitoring data, in the monitoring process, calculate the settlement volume of monitoring point through the liquid pressure differential variation between multistage formula hydraulic system and the monitoring point, in order to realize the purpose of the peripheral earth's surface vertical displacement of automatic monitoring foundation ditch. The device has the advantages of convenient operation, high measurement precision and low cost, and can realize the purpose of automatically monitoring the ground surface settlement around the foundation pit.
Description
Technical Field
The utility model relates to a foundation ditch monitoring technology field, more specifically say and relate to the vertical displacement hydraulic monitoring device in peripheral earth's surface of foundation ditch.
Background
At present, the construction of urban underground space reaches unprecedented scale and height, so that a large number of projects and problems of deep foundation pit excavation and supporting are generated, the projects and problems are particularly concerned by domestic scholars and professionals in the aspect of deep foundation pit safety control, the foundation pit monitoring is the most effective method for controlling safety and guiding construction, and according to the requirements of the existing building foundation pit engineering monitoring technical specification (GB50497-2009) and the urban rail transit engineering monitoring technical specification (GB50911-2013), the monitoring of the vertical displacement of the ground surface at the periphery of the deep foundation pit is one of the conventional indexes for monitoring the safety of the foundation pits at all levels.
The settlement of the ground surface around the foundation pit is mainly caused by the drainage of underground water and the deformation of a main body enclosure structure of the foundation pit during the excavation of the foundation pit and the construction of the enclosure structure, and if the design and the construction of the enclosure structure are unreasonable, seepage and piping are easily generated, so that the surrounding ground surface sinks and collapses, and the safety of the construction of the main body structure of the foundation pit and the surrounding environment is directly influenced. Therefore, monitoring of the settlement of the ground surface around the foundation pit is important for monitoring the safety construction of the foundation pit and the safety of the surrounding environment.
At present, the settlement monitoring of the ground surface around the foundation pit usually adopts a geometric leveling method, a triangular elevation method, a static leveling method and the like, in order to meet the requirement of measurement precision, the method has higher requirements on personnel measurement level, measurement instrument precision, datum point layout and field conditions, meanwhile, in order to achieve an ideal monitoring effect, the three-fixation principle of a fixed line, a fixed person and a fixed instrument is strictly followed in the field monitoring process, so that the field monitoring efficiency is influenced, the instrument and labor cost is greatly improved, in addition, for urban subway engineering, the problems of construction space limitation, complex surrounding environment and the like exist, so that monitoring points are often covered by construction materials, or the monitoring can not be realized due to the damage of construction machinery, and with the continuous improvement of the automation level of the foundation pit monitoring industry, the device and the method for realizing the automatic monitoring of the surrounding ground surface are urgently sought.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes not enough among the prior art, instrument that exists among the peripheral earth's surface settlement monitoring method of current foundation ditch is with high costs, measurement of efficiency is low, require strict scheduling problem to personnel's experience level, provide the peripheral earth's surface vertical displacement hydraulic monitoring device of foundation ditch, the device convenient operation, measurement accuracy height, with low costs, and can realize the peripheral earth's surface settlement automatic monitoring's of foundation ditch purpose.
The purpose of the utility model is realized by the following technical scheme.
The hydraulic monitoring device for the vertical displacement of the ground surface at the periphery of the foundation pit comprises a multi-section hydraulic system and a wireless transmission system, and performs slotting operation on the ground surface at the position of a monitoring section to obtain a monitoring point groove;
the multi-section hydraulic system comprises a vibrating wire osmometer, a steel wire hose, monitoring liquid, a sealing plug and a pipe clamp, wherein the tail end of the steel wire hose is inserted into a groove of a monitoring point, the vibrating wire osmometer is sequentially and uniformly arranged in the steel wire hose, the head end of the steel wire hose is sealed by the sealing plug, the steel wire hose is filled with the monitoring liquid, and the tail end of the steel wire hose is fixed with a ground connection wall or a crown beam by the pipe clamp;
the wireless transmission system comprises a wireless transmitter and a PC (personal computer) end, a data line of the vibrating wire type osmometer is connected with an input end of the wireless transmitter, a wireless signal output end of the wireless transmitter is connected with a signal input end of the PC end, initial monitoring data are collected by the wireless transmission system, and in the monitoring process, the settlement of a monitoring point is calculated through the liquid pressure difference variable quantity between the multi-section hydraulic system and the monitoring point so as to achieve the purpose of automatically monitoring the vertical displacement of the ground surface around the foundation pit.
The sealing plug is provided with an exhaust valve, a water injection port and a wire outlet, the water injection port is used for injecting monitoring liquid from the head end of the steel wire hose until the monitoring liquid fills the whole steel wire hose and discharges all gas in the steel wire hose side by side, the exhaust hole is used for discharging all gas in the steel wire hose, and the wire outlet is used for leading out a data wire of the vibrating wire osmometer from the wire outlet of the sealing plug at the head end of the steel wire hose and connecting with a wireless transmission system.
The top of the steel wire hose is located 3-5cm below the ground, the outer diameter of the steel wire hose is 62mm, the inner diameter of the steel wire hose is 50mm, and the rupture pressure of the steel wire hose is 14kgf/cm2。
The diameter of the vibrating wire osmometer is 25mm, the measuring range of the vibrating wire osmometer is 0-170kPa, and the resolution of the vibrating wire osmometer is less than or equal to 0.05 percent F.S.
And a temperature sensor is arranged in the vibrating wire osmometer, and the measurement range of the temperature sensor is-25 ℃ to +60 ℃.
The monitoring liquid is antifreeze liquid or distilled water, and the density of the monitoring liquid needs to be measured in advance through tests so as to solve the construction problem in winter.
And a calibration point of the elevation of the pipe orifice of the steel wire hose is arranged on the crown beam corresponding to the monitoring section so as to realize the purpose of calibrating the water head elevation of the pipe orifice of the steel wire hose, and the calibration frequency is 1 week/time.
The wireless transmitter adopts a vibrating wire type frequency determinator emitter, and the transmitting-receiving distance of the wireless transmitter is 1.0 km.
The number of the wireless transmitters is 8, the measurement accuracy of the wireless transmitters is +/-0.01 Hz, and the wireless transmitters can be used repeatedly.
The depth of the monitoring point groove is 5-10 cm.
The utility model has the advantages that: the device is convenient to manufacture and install, the vertical displacement monitoring points on the ground surface of the site are buried in a hidden mode, the settlement of each point is calculated through liquid pressure difference, automatic measurement is realized, the measurement time of the conventional long-distance leveling wire closing method is greatly shortened, the measurement precision is improved, the problem that data cannot be measured due to the fact that machinery, materials, waste muck or the monitoring points are covered on the monitoring points or the monitoring points are damaged is solved, and the device can be better suitable for the complex construction environment of the site; the device has simple measurement, high precision and short time, can realize single-person wireless data reception, and greatly reduces the labor cost; the price of the used materials and instruments is low, the osmometer can be repeatedly used, and the input cost of the instruments is reduced; the monitoring data is simple to process, the vertical displacement condition of the monitoring point can be obtained after field measurement, and the monitoring data can be fed back in time; in addition, the device water-proof effects is good, receives weather influence for a short time, and monitoring data is normal under the bad weather, and the practicality is stronger.
Drawings
Fig. 1 is a schematic view of the monitoring plane top structure of the present invention;
fig. 2 is a schematic structural diagram of a multi-section hydraulic system of the present invention;
FIG. 3 is a schematic view of the A-A direction monitoring section of FIG. 1;
FIG. 4 is a schematic view of the monitoring cross-section in the direction B-B of FIG. 1;
fig. 5 is an enlarged schematic view of the sealing plug of the present invention;
in the figure: 1-1 is a vibrating wire osmometer, 1-2 is a steel wire hose, 1-3 is monitoring liquid, 1-4 is a sealing plug, 1-5 is an exhaust valve, 1-6 is a water injection port, 1-7 is a wire outlet, 1-8 is a pipe clamp, 2-1 is a wireless transmitter, 2-2 is a PC computer end, 2-3 is a calibration point, 3 is a foundation pit, 4 is a ground connecting wall or a crown beam, 5 is a support, 6 is backfill soil, 7 is ground hardening, and 8 is a temporary enclosing wall.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The technical solution of the present invention is further explained by the following specific examples.
Example one
The hydraulic monitoring device for the vertical displacement of the ground surface at the periphery of the foundation pit comprises a multi-section hydraulic system and a wireless transmission system, and performs slotting operation on the ground surface at the position of a monitoring section to obtain a monitoring point groove;
the multi-section hydraulic system comprises a vibrating wire type osmometer 1-1, a steel wire hose 1-2, monitoring liquid 1-3, a sealing plug 1-4 and a pipe clamp 1-8, wherein the tail end of the steel wire hose 1-2 is inserted into a groove of a monitoring point, the vibrating wire type osmometer 1-1 is sequentially and uniformly arranged in the steel wire hose 1-2, the head end of the steel wire hose 1-2 is sealed by the sealing plug 1-4, the steel wire hose 1-2 is filled with the monitoring liquid 1-3, and the tail end of the steel wire hose 1-2 is fixed with a ground connection wall or a crown beam 4 by the pipe clamp 1-8.
The wireless transmission system comprises a wireless transmitter 2-1 and a PC (personal computer) end 2-2, a data line of the vibrating wire type osmometer 1-1 is connected with an input end of the wireless transmitter 2-1, a wireless signal output end of the wireless transmitter 2-1 is connected with a signal input end of the PC end 2-2, and in the monitoring process, the settlement of a monitoring point is calculated through the liquid pressure difference variable quantity between the multi-section hydraulic system and the monitoring point, so that the purpose of automatically monitoring the vertical displacement of the ground surface around the foundation pit is achieved.
The depth of the groove of the monitoring point is 5-10 cm.
Example two
On the basis of the first embodiment, an exhaust valve 1-5, a water injection port 1-6 and a wire outlet 1-7 are arranged on a sealing plug 1-4, the water injection port 1-6 is used for injecting monitoring liquid 1-3 from the head end of a steel wire hose 1-2 until the monitoring liquid 1-3 fills the whole steel wire hose 1-2 and discharges all gas in the steel wire hose 1-2, an exhaust hole is used for discharging all gas in the steel wire hose 1-2, and the wire outlet 1-7 is used for leading out a data wire of a vibrating wire osmometer 1-1 from the wire outlet 1-7 of the head end 1-4 of the sealing plug 1-2 and connecting with a wireless transmission system.
The top of the steel wire hose 1-2 is located 3-5cm below the ground, the outer diameter of the steel wire hose 1-2 is 62mm, the inner diameter of the steel wire hose 1-2 is 50mm, and the burst pressure of the steel wire hose 1-2 is 14kgf/cm2。
The diameter of the vibrating wire type osmometer 1-1 is 25mm, the measuring range of the vibrating wire type osmometer 1-1 is 0-170kPa, the resolution ratio of the vibrating wire type osmometer 1-1 is less than or equal to 0.05 percent F.S, a temperature sensor is arranged in the vibrating wire type osmometer 1-1, and the measuring range of the temperature sensor is-25 ℃ to +60 ℃.
The monitoring liquid 1-3 is antifreeze liquid or distilled water, and the density of the monitoring liquid 1-3 needs to be measured in advance through tests so as to solve the construction problem in winter.
EXAMPLE III
On the basis of the second embodiment, calibration points 2-3 of the elevation of the pipe orifice of the steel wire hose 1-2 are arranged on the crown beam corresponding to the monitoring section, so that the aim of calibrating the water head elevation of the pipe orifice of the steel wire hose 1-2 is fulfilled.
The calibration frequency was 1 week/time.
The wireless transmitter 2-1 adopts a vibrating wire type frequency determinator emitter, and the transmitting-receiving distance of the wireless transmitter 2-1 is 1.0 km.
The number of the wireless transmitters 2-1 is 8, the measurement precision of the wireless transmitters 2-1 is +/-0.01 Hz, and the wireless transmitters 2-1 can be repeatedly used.
Monitoring principle: if the position of the monitoring point is settled, under the condition that the elevation of a water head at the position of the pipe opening of the steel wire hose is not changed, the height difference of the monitoring liquid is increased, the pressure intensity measured by the vibrating wire osmometer is increased, and then the settlement amount is calculated through the pressure difference of the initial monitoring liquid.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (10)
1. Peripheral earth's surface vertical displacement hydraulic pressure monitoring devices of foundation ditch, its characterized in that: the method comprises a multi-section hydraulic system and a wireless transmission system, wherein a groove is formed in the ground surface at the position of a monitoring section to obtain a monitoring point groove;
the multi-section hydraulic system comprises a vibrating wire osmometer, a steel wire hose, monitoring liquid, a sealing plug and a pipe clamp, wherein the tail end of the steel wire hose is inserted into a groove of a monitoring point, the vibrating wire osmometer is sequentially and uniformly arranged in the steel wire hose, the head end of the steel wire hose is sealed by the sealing plug, the steel wire hose is filled with the monitoring liquid, and the tail end of the steel wire hose is fixed with a ground connection wall or a crown beam by the pipe clamp;
the wireless transmission system comprises a wireless transmitter and a PC (personal computer) end, a data line of the vibrating wire osmometer is connected with the input end of the wireless transmitter, and the wireless signal output end of the wireless transmitter is connected with the signal input end of the PC end.
2. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 1, characterized in that: the sealing plug is provided with an exhaust valve, a water injection port and a wire outlet, the water injection port is used for injecting monitoring liquid from the head end of the steel wire hose until the monitoring liquid fills the whole steel wire hose and discharges all gas in the steel wire hose side by side, the exhaust hole is used for discharging all gas in the steel wire hose, and the wire outlet is used for leading out a data wire of the vibrating wire osmometer from the wire outlet of the sealing plug at the head end of the steel wire hose and connecting with a wireless transmission system.
3. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 2, characterized in that: the top of the steel wire hose is located 3-5cm below the ground, the outer diameter of the steel wire hose is 62mm, the inner diameter of the steel wire hose is 50mm, and the rupture pressure of the steel wire hose is 14kgf/cm2。
4. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 2, characterized in that: the diameter of the vibrating wire osmometer is 25mm, the measuring range of the vibrating wire osmometer is 0-170kPa, and the resolution of the vibrating wire osmometer is less than or equal to 0.05 percent F.S.
5. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 4, characterized in that: and a temperature sensor is arranged in the vibrating wire osmometer, and the measurement range of the temperature sensor is-25 ℃ to +60 ℃.
6. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 2, characterized in that: the monitoring liquid adopts antifreezing liquid or distilled water.
7. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 1, characterized in that: and (3) arranging a calibration point of the elevation of the steel hose pipe orifice on the crown beam corresponding to the monitored section, wherein the calibration frequency is 1 week/time.
8. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 1, characterized in that: the wireless transmitter adopts a vibrating wire type frequency determinator emitter, and the transmitting-receiving distance of the wireless transmitter is 1.0 km.
9. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 8, characterized in that: the number of the wireless transmitters is 8, and the measurement precision of the wireless transmitters is +/-0.01 Hz.
10. The hydraulic monitoring device for the vertical displacement of the ground surface around the foundation pit according to claim 1, characterized in that: the depth of the monitoring point groove is 5-10 cm.
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| CN202023323884.4U CN214470751U (en) | 2020-12-31 | 2020-12-31 | Hydraulic monitoring device for vertical displacement of ground surface around foundation pit |
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| CN202023323884.4U CN214470751U (en) | 2020-12-31 | 2020-12-31 | Hydraulic monitoring device for vertical displacement of ground surface around foundation pit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759781A (en) * | 2018-06-11 | 2018-11-06 | 武汉二航路桥特种工程有限责任公司 | The vertical displacement monitoring device and method of initial big height difference structure |
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2020
- 2020-12-31 CN CN202023323884.4U patent/CN214470751U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759781A (en) * | 2018-06-11 | 2018-11-06 | 武汉二航路桥特种工程有限责任公司 | The vertical displacement monitoring device and method of initial big height difference structure |
| CN108759781B (en) * | 2018-06-11 | 2024-01-16 | 中交特种工程有限公司 | Vertical displacement monitoring device and method for initial large-height-difference structure |
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