CN114183126B - Implementation method for abnormal observation water level of precipitation well - Google Patents
Implementation method for abnormal observation water level of precipitation well Download PDFInfo
- Publication number
- CN114183126B CN114183126B CN202111547600.6A CN202111547600A CN114183126B CN 114183126 B CN114183126 B CN 114183126B CN 202111547600 A CN202111547600 A CN 202111547600A CN 114183126 B CN114183126 B CN 114183126B
- Authority
- CN
- China
- Prior art keywords
- water level
- pipe
- dewatering well
- wellhead
- connecting pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
- E21B47/047—Liquid level
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention provides an implementation method for observing water level of a precipitation well in different positions, belongs to the field of precipitation wells, solves the problems that the actual water level elevation of the precipitation well cannot be known in the prior art, and comprises the following steps: step S01: inserting a dewatering well pipe into a preset position of a foundation pit; step S02: cutting off the dewatering well pipe above the bottom plate, and sealing the wellhead of the cut dewatering well pipe by using a wellhead sealing device; step S03: the connecting pipe is used for connecting the water level measuring device with the cut dewatering well pipe or the wellhead sealing device, and the connecting pipe is buried below the bottom plate. The invention can solve the problem of water level observation when the groundwater level is higher than the wellhead of the precipitation well pipe.
Description
Technical Field
The invention belongs to the field of dewatering wells, and particularly relates to an implementation method for observing water level of a dewatering well in an off-site manner.
Background
Under the normal condition, the dewatering well wellhead is positioned above and below the leveling ground, the dewatering well water level is positioned below the dewatering well wellhead, and the conventional measurement method is adopted for the dewatering well water level observation. However, under some conditions, the well pipe of the dewatering well is much higher than the excavation surface, and a protection platform cannot be built on the dewatering well within the excavation range, so that the well pipe of the dewatering well needs to be cut off for a certain length for protection, the elevation of the water level of the dewatering well is higher than the elevation of the wellhead, and the groundwater in the dewatering well overflows outwards along the wellhead, so that the true elevation of the water level of the dewatering well (namely the water level of the groundwater) cannot be known.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an implementation method for observing the water level of a dewatering well in an off-site manner.
The aim of the invention can be achieved by the following technical scheme: an implementation method for observing water level of a precipitation well in an off-site manner comprises the following steps:
step S01: inserting a dewatering well pipe into a preset position of a foundation pit;
step S02: cutting off the dewatering well pipe above the bottom plate, and sealing the wellhead of the cut dewatering well pipe by using a wellhead sealing device;
step S03: the connecting pipe is used for connecting the water level measuring device with the cut dewatering well pipe or the wellhead sealing device, and the connecting pipe is buried below the bottom plate.
The working principle of the invention is as follows: firstly, selecting a position (namely a preset position of a foundation pit), then inserting a dewatering well pipe, if the dewatering well pipe is higher than the excavation surface by a large amount, cutting off the dewatering well pipe above the bottom plate, sealing the wellhead of the cut dewatering well pipe by a wellhead sealing device, connecting a water level measuring device with the cut dewatering well pipe through a connecting pipe, or connecting the water level measuring device with the wellhead sealing device, and observing the water level of underground water by a worker through observing the water level measuring device. The invention can solve the problem of water level observation when the groundwater level is higher than the wellhead of the precipitation well pipe.
In the implementation method of the abnormal water level observation of the dewatering well, in step S03, the connecting pipe is connected with the water level measuring device by adopting a welding or threaded connection mode.
In the implementation method of the abnormal water level observation of the dewatering well, in step S03, the connecting pipe is connected to one side of the dewatering well pipe or the wellhead sealing device in a welding or threaded connection mode.
In the implementation method of the abnormal water level observation of the dewatering well, the water level measuring device is located above the bottom plate.
In the implementation method for observing the water level in the abnormal position of the dewatering well, the water level measuring device is a measuring tube, and the measuring tube is made of transparent materials.
In the implementation method for observing the water level in the abnormal position of the dewatering well, scales are arranged on the side wall of the measuring tube.
In the implementation method of the abnormal water level observation of the dewatering well, the pipe diameters of the measuring pipe and the connecting pipe are smaller than the pipe diameter of the dewatering well pipe.
In the implementation method of the abnormal water level observation of the dewatering well, the water level measuring device is a sensor or a pressure gauge.
Compared with the prior art, the invention can solve the problem of water level observation when the groundwater level is higher than the wellhead of the precipitation well pipe.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the present invention;
FIG. 3 is a schematic view of the wellhead seal of the present invention.
In the figure, 1, a precipitation well pipe; 2. a wellhead sealing device; 3. a connecting pipe; 4. a measuring tube; 5. a sensor.
Detailed Description
The following is a specific embodiment of the invention and is combined with the accompanying drawings to further explain the technical scheme of the invention
The present invention is described without being limited to these examples.
As shown in fig. 1-3, an implementation method for observing water level of a precipitation well in an off-site manner comprises the following steps:
step S01: inserting a dewatering well pipe 1 into a preset position of a foundation pit;
step S02: cutting off the dewatering well pipe 1 above the bottom plate, and sealing the wellhead of the cut dewatering well pipe 1 by using a wellhead sealing device 2;
step S03: the water level measuring device and the cut dewatering well pipe 1 or the wellhead sealing device 2 are connected by a connecting pipe 3, and the connecting pipe 3 is buried under the bottom plate.
The connecting pipe 3 is buried under the bottom plate for better protection of the connecting pipe 3.
Further, in step S03, the water level measuring device is connected to the connecting pipe 3 by welding or screwing. The connecting pipe 3 is connected to one side of the dewatering pipe 1 or the wellhead sealing device 2 by adopting a welding or threaded connection mode.
After the dewatering well pipe 1 above the bottom plate is cut off, the wellhead is sealed by the wellhead sealing device 2, then the connecting pipe 3 is welded on one side of the dewatering well pipe 1, or the connecting pipe 3 is connected with one side of the dewatering well pipe 1 in a threaded manner, or the connecting pipe 3 is welded or connected with one side of the wellhead sealing device 2 in a threaded manner, so that the dewatering well pipe 1 and the connecting pipe 3 are communicated. The connecting pipe 3 is welded or screwed on one side of the dewatering pipe 1 or the wellhead sealing device 2, and the opening can be cut when welding is needed, then the connecting pipe 3 is welded, or a threaded opening is preset, before the connecting pipe 3 is welded or screwed, the opening is plugged by a plug, and when welding or screwed is needed, the plug is removed, and the connecting pipe 3 is welded or screwed.
The welded connection points must have certain strength, so that the looseness of the welding points under the action of air pressure and water pressure is prevented, and the water leakage of the welding points is prevented. Then the water level measuring device is connected on the connecting pipe 3 through threads, and a raw adhesive tape is needed to be adopted for processing the threads at the place where the threads are connected, so that water leakage is prevented.
All the screw connection modes of the embodiment can be replaced by welding or other connection modes can be adopted.
Further, the water level measuring device is positioned above the bottom plate. The excavation surface is selected on the bottom plate, then the pit in the pit is excavated downwards, and the water level measuring device is positioned above the bottom plate, so that people can observe the water level measuring device conveniently.
The water level measuring device has two embodiments, as follows:
in one embodiment, as shown in fig. 1, further, the water level measuring device is a measuring tube 4, and the measuring tube 44 is made of a transparent material. Graduations are arranged on the side wall of the measuring tube 4. This setting is convenient for observe the water level.
Further, the pipe diameter of the measuring pipe 4 is smaller than that of the precipitation well pipe 1. The pipe diameters of the measuring pipe 4 and the connecting pipe 3 are small, and the water level can be measured only by one measuring pipe 4 with a small pipe diameter.
In the second embodiment, as shown in fig. 2, the water level measuring device is a sensor 5 or a pressure gauge.
The water level measuring device can adopt a pressure gauge, a sensor 5 or other tools capable of displaying water pressure and water level.
If the groundwater level is higher than the water level when the well head of the precipitation well pipe 1, the sensor 5 senses the water pressure and displays the water pressure, thereby observing the water level.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although a number of terms are used more herein, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (6)
1. The implementation method of the abnormal observation water level of the precipitation well is characterized by comprising the following steps of:
step S01: inserting a dewatering well pipe (1) into a preset position of a foundation pit;
step S02: cutting off the dewatering well pipe (1) above the bottom plate, and sealing the wellhead of the cut dewatering well pipe (1) by using a wellhead sealing device (2);
step S03: connecting a water level measuring device and a cut dewatering well pipe (1) or a wellhead sealing device (2) by using a connecting pipe (3), and burying the connecting pipe (3) below a bottom plate;
selecting an excavation surface on the bottom plate, then excavating a pit in the pit downwards, and positioning the water level measuring device above the bottom plate;
in the step S03, the connecting pipe (3) is connected to one side of the dewatering well pipe (1) or the wellhead sealing device (2) in a welding or threaded connection mode.
2. The method according to claim 1, wherein in step S03, the connecting pipe (3) is connected to the water level measuring device by welding or screwing.
3. The method for implementing the abnormal observation of the water level of the precipitation well according to claim 1, wherein the water level measuring device is a measuring tube (4), and the measuring tube (4) is made of transparent materials.
4. A method of implementing an off-site observation of water level in a precipitation well according to claim 3, wherein the side wall of the measuring tube (4) is provided with graduations.
5. A method of implementing an off-site observation of the water level of a precipitation well according to claim 3, wherein the pipe diameter of the measuring pipe (4) and the connecting pipe (3) is smaller than the pipe diameter of the precipitation well pipe (1).
6. The implementation method of the offsite observing water level of the dewatering well according to claim 1, wherein the water level measuring device is a sensor (5) or a pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547600.6A CN114183126B (en) | 2021-12-16 | 2021-12-16 | Implementation method for abnormal observation water level of precipitation well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547600.6A CN114183126B (en) | 2021-12-16 | 2021-12-16 | Implementation method for abnormal observation water level of precipitation well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114183126A CN114183126A (en) | 2022-03-15 |
| CN114183126B true CN114183126B (en) | 2023-09-19 |
Family
ID=80544228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111547600.6A Active CN114183126B (en) | 2021-12-16 | 2021-12-16 | Implementation method for abnormal observation water level of precipitation well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114183126B (en) |
Citations (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1038427A1 (en) * | 1982-01-04 | 1983-08-30 | Ленинградский Ордена Трудового Красного Знамени Инженерно-Строительный Институт | Sewage tubular overfall |
| JPH1110106A (en) * | 1997-06-19 | 1999-01-19 | Shimizu Corp | Leakage management method for contaminant underground containment facility |
| KR20000053882A (en) * | 2000-05-03 | 2000-09-05 | 정찬걸 | Under ground water of fluctuation determinater |
| WO2003054481A2 (en) * | 2001-12-21 | 2003-07-03 | Endress + Hauser Gmbh + Co. Kg | Method for detecting and/or monitoring a physical or chemical process variable |
| CA2463077A1 (en) * | 2004-04-07 | 2005-10-07 | J. Kelly Doary | Method and apparatus for determining water level in a drilled or dug well for monitoring and water flow control purposes |
| JP2006208118A (en) * | 2005-01-26 | 2006-08-10 | Sanki Eng Co Ltd | Tubular sensor for water level observation-cum-water level control, and water-receiving tank with the same sensor disposed therein |
| CN201050360Y (en) * | 2007-07-06 | 2008-04-23 | 刘金生 | Geothermal well water level observation device |
| CN201569466U (en) * | 2009-10-29 | 2010-09-01 | 唐山现代工控技术有限公司 | Integrated logging well |
| WO2014005099A1 (en) * | 2012-06-29 | 2014-01-03 | Wellintel, Inc. | Well head water level sensor |
| KR101577663B1 (en) * | 2015-04-06 | 2015-12-15 | 주식회사 웅지산업개발 | Apparatus for measuring level of ground water measuring |
| KR101687316B1 (en) * | 2016-06-17 | 2016-12-16 | 주식회사 서웅이엔씨 | An underground pressure instrumentation structure and method for construction |
| CN205822216U (en) * | 2016-05-27 | 2016-12-21 | 中国一冶集团有限公司 | The accurate device for fast detecting of dewatering well water level |
| US9709434B1 (en) * | 2015-01-29 | 2017-07-18 | Jogler, Llc | Level indicator system |
| CN107620312A (en) * | 2017-08-27 | 2018-01-23 | 中铁十二局集团有限公司 | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation |
| CN107655541A (en) * | 2017-09-18 | 2018-02-02 | 神华集团有限责任公司 | Goaf groundwater reservoir intelligent monitoring and controlling device and method |
| CN107989055A (en) * | 2017-11-01 | 2018-05-04 | 中国核工业第二二建设有限公司 | A kind of intelligence control system and control method for architectural engineering deep-well precipitation |
| JP2018179742A (en) * | 2017-04-13 | 2018-11-15 | 大成建設株式会社 | Groundwater level measurement device and groundwater level measurement system |
| CN109610525A (en) * | 2018-12-04 | 2019-04-12 | 中国十七冶集团有限公司 | A kind of method of quick judgement water-stop curtain construction quality |
| KR101949214B1 (en) * | 2018-09-07 | 2019-05-21 | 지에스이앤씨(주) | Drain system to measure underground water level using the building sump pit |
| CN109958119A (en) * | 2019-04-02 | 2019-07-02 | 中铁二十三局集团第四工程有限公司 | A kind of underground engineering water level observation well construction method |
| CN110006507A (en) * | 2019-02-28 | 2019-07-12 | 舟山市水利勘测设计院 | Boring method Jian Anshi water level observation well mechanism |
| CN110043249A (en) * | 2019-05-06 | 2019-07-23 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | A kind of vertical shaft constructs water shutoff layer monitoring device under water |
| CN209168392U (en) * | 2018-12-29 | 2019-07-26 | 上海长凯岩土工程有限公司 | Monitoring system based on safeguard protection wireless test groundwater level |
| CN110132650A (en) * | 2019-04-30 | 2019-08-16 | 同济大学 | A method for sampling groundwater wells in polluted sites |
| CN210119261U (en) * | 2019-08-05 | 2020-02-28 | 中石化石油工程技术服务有限公司 | Liquid level measuring device applied to vertical oil-gas separator |
| WO2020096570A1 (en) * | 2018-11-06 | 2020-05-14 | Halliburton Energy Services, Inc. | Subsurface measurement compression and reconstruction |
| CN211477288U (en) * | 2020-04-14 | 2020-09-11 | 付明军 | Hydrogeology hole groundwater level observation device |
| CN111980041A (en) * | 2020-08-27 | 2020-11-24 | 河南科技大学 | A kind of precipitation box and foundation pit working face precipitation system |
| CN112392023A (en) * | 2020-11-09 | 2021-02-23 | 上海宝冶工程技术有限公司 | Automatic monitoring water level gauge device capable of being used as waterproof baffle |
| CN214660127U (en) * | 2021-05-25 | 2021-11-09 | 刘涛 | Intelligent detection device for drilling fluid level of anti-overflow pipe of petroleum drilling wellhead |
-
2021
- 2021-12-16 CN CN202111547600.6A patent/CN114183126B/en active Active
Patent Citations (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1038427A1 (en) * | 1982-01-04 | 1983-08-30 | Ленинградский Ордена Трудового Красного Знамени Инженерно-Строительный Институт | Sewage tubular overfall |
| JPH1110106A (en) * | 1997-06-19 | 1999-01-19 | Shimizu Corp | Leakage management method for contaminant underground containment facility |
| KR20000053882A (en) * | 2000-05-03 | 2000-09-05 | 정찬걸 | Under ground water of fluctuation determinater |
| WO2003054481A2 (en) * | 2001-12-21 | 2003-07-03 | Endress + Hauser Gmbh + Co. Kg | Method for detecting and/or monitoring a physical or chemical process variable |
| CA2463077A1 (en) * | 2004-04-07 | 2005-10-07 | J. Kelly Doary | Method and apparatus for determining water level in a drilled or dug well for monitoring and water flow control purposes |
| JP2006208118A (en) * | 2005-01-26 | 2006-08-10 | Sanki Eng Co Ltd | Tubular sensor for water level observation-cum-water level control, and water-receiving tank with the same sensor disposed therein |
| CN201050360Y (en) * | 2007-07-06 | 2008-04-23 | 刘金生 | Geothermal well water level observation device |
| CN201569466U (en) * | 2009-10-29 | 2010-09-01 | 唐山现代工控技术有限公司 | Integrated logging well |
| WO2014005099A1 (en) * | 2012-06-29 | 2014-01-03 | Wellintel, Inc. | Well head water level sensor |
| US9709434B1 (en) * | 2015-01-29 | 2017-07-18 | Jogler, Llc | Level indicator system |
| KR101577663B1 (en) * | 2015-04-06 | 2015-12-15 | 주식회사 웅지산업개발 | Apparatus for measuring level of ground water measuring |
| CN205822216U (en) * | 2016-05-27 | 2016-12-21 | 中国一冶集团有限公司 | The accurate device for fast detecting of dewatering well water level |
| KR101687316B1 (en) * | 2016-06-17 | 2016-12-16 | 주식회사 서웅이엔씨 | An underground pressure instrumentation structure and method for construction |
| JP2018179742A (en) * | 2017-04-13 | 2018-11-15 | 大成建設株式会社 | Groundwater level measurement device and groundwater level measurement system |
| CN107620312A (en) * | 2017-08-27 | 2018-01-23 | 中铁十二局集团有限公司 | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation |
| CN107655541A (en) * | 2017-09-18 | 2018-02-02 | 神华集团有限责任公司 | Goaf groundwater reservoir intelligent monitoring and controlling device and method |
| CN107989055A (en) * | 2017-11-01 | 2018-05-04 | 中国核工业第二二建设有限公司 | A kind of intelligence control system and control method for architectural engineering deep-well precipitation |
| KR101949214B1 (en) * | 2018-09-07 | 2019-05-21 | 지에스이앤씨(주) | Drain system to measure underground water level using the building sump pit |
| WO2020096570A1 (en) * | 2018-11-06 | 2020-05-14 | Halliburton Energy Services, Inc. | Subsurface measurement compression and reconstruction |
| CN109610525A (en) * | 2018-12-04 | 2019-04-12 | 中国十七冶集团有限公司 | A kind of method of quick judgement water-stop curtain construction quality |
| CN209168392U (en) * | 2018-12-29 | 2019-07-26 | 上海长凯岩土工程有限公司 | Monitoring system based on safeguard protection wireless test groundwater level |
| CN110006507A (en) * | 2019-02-28 | 2019-07-12 | 舟山市水利勘测设计院 | Boring method Jian Anshi water level observation well mechanism |
| CN109958119A (en) * | 2019-04-02 | 2019-07-02 | 中铁二十三局集团第四工程有限公司 | A kind of underground engineering water level observation well construction method |
| CN110132650A (en) * | 2019-04-30 | 2019-08-16 | 同济大学 | A method for sampling groundwater wells in polluted sites |
| CN110043249A (en) * | 2019-05-06 | 2019-07-23 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | A kind of vertical shaft constructs water shutoff layer monitoring device under water |
| CN210119261U (en) * | 2019-08-05 | 2020-02-28 | 中石化石油工程技术服务有限公司 | Liquid level measuring device applied to vertical oil-gas separator |
| CN211477288U (en) * | 2020-04-14 | 2020-09-11 | 付明军 | Hydrogeology hole groundwater level observation device |
| CN111980041A (en) * | 2020-08-27 | 2020-11-24 | 河南科技大学 | A kind of precipitation box and foundation pit working face precipitation system |
| CN112392023A (en) * | 2020-11-09 | 2021-02-23 | 上海宝冶工程技术有限公司 | Automatic monitoring water level gauge device capable of being used as waterproof baffle |
| CN214660127U (en) * | 2021-05-25 | 2021-11-09 | 刘涛 | Intelligent detection device for drilling fluid level of anti-overflow pipe of petroleum drilling wellhead |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114183126A (en) | 2022-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104389325B (en) | The full-automatic inclination measurement system of foundation pit enclosure wall and tilt measurement | |
| CN110529126B (en) | Comprehensive early warning device for tail shield sealing system of shield tunneling machine and working method of comprehensive early warning device | |
| CN103485320B (en) | U-shaped inclinometer and mounting and embedding method thereof | |
| CN105606278A (en) | Drill hole monitoring probing rod for surrounding rock stress field | |
| CN210774018U (en) | A horizontal and vertical integrated monitoring device for soft soil shield tunnel | |
| CN102269578A (en) | Space structure vertical deformation measurement device | |
| CN107727065B (en) | Drilling sedimentation deformation monitoring system and monitoring method thereof | |
| CN104697496B (en) | Split type static hydraulic pressure difference settlement monitoring system and installation method thereof | |
| CN108731635A (en) | A kind of dam profundal zone large deformation settlement observer and method | |
| CN1062974A (en) | Boring subsection water injection, the inflation technology of leaking hunting | |
| CN114183126B (en) | Implementation method for abnormal observation water level of precipitation well | |
| CN103148772A (en) | Section bar type soil internal horizontal displacement measuring instrument | |
| CN217204181U (en) | Precipitation well structure of water level is surveyd to dystopy | |
| CN109282790B (en) | Parallel deep multi-point static leveling system and method for pile foundation | |
| CN207728358U (en) | Multi-parameter sensor based on downhole testing | |
| CN216954915U (en) | Detection device beneficial to improving interaction relation between stope overburden and hydraulic support | |
| CN214470751U (en) | Hydraulic monitoring device for vertical displacement of ground surface around foundation pit | |
| CN201803708U (en) | Vertical deformation measuring device of spatial structure | |
| CN216791179U (en) | Automatic monitoring system for longitudinal differential settlement of underground structure | |
| CN214503289U (en) | Water pressure test device | |
| CN113029095B (en) | Coal mine earth surface wide area high-precision online settlement monitoring method | |
| CN205506271U (en) | Stress in surrounding rock field drilling monitoring probe rod | |
| CN108225431A (en) | For the multi-parameter sensor and method of mining Subsidence Area, slip mass to be observed continuously | |
| CN208636444U (en) | A kind of geostress survey device and geostress survey system | |
| CN112813950A (en) | Multi-section hydraulic monitoring method for automatically monitoring vertical displacement of ground surface around foundation pit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |