CN111441394A - Auxiliary installation method of inclinometer pipe for monitoring deep horizontal displacement of deep foundation pit - Google Patents
Auxiliary installation method of inclinometer pipe for monitoring deep horizontal displacement of deep foundation pit Download PDFInfo
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- CN111441394A CN111441394A CN202010110253.XA CN202010110253A CN111441394A CN 111441394 A CN111441394 A CN 111441394A CN 202010110253 A CN202010110253 A CN 202010110253A CN 111441394 A CN111441394 A CN 111441394A
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- pipe
- hole
- inclinometer
- monitoring
- foundation pit
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 title claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 29
- 238000005553 drilling Methods 0.000 claims abstract description 28
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 6
- 239000000440 bentonite Substances 0.000 claims abstract description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 6
- 239000004800 polyvinyl chloride Substances 0.000 abstract 6
- 239000002689 soil Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an auxiliary installation method of an inclinometer pipe for monitoring the deep horizontal displacement of a deep foundation pit, which comprises a PVC (polyvinyl chloride) casing pipe (1), a drilling machine (2) provided with a slurry pump (2-1), a rubber pipe (3) and the inclinometer pipe (4); a drilling machine (2) drills a hole on an earth slope in advance, a slurry pump (2-1) is started in the drilling process, bentonite slurry which is stirred in advance at a specific concentration is extracted by a rubber pipe (3), and the slurry protects the wall of the drilled hole through a hollow drill rod; when the hole is drilled to the designed elevation of the hole bottom, putting the PVC casing pipes (1) section by section in the drilled hole; inserting a rubber pipe (3) at an inlet of a mud pump into the bottom of the PVC casing pipe (1) in the drilled hole, and starting the mud pump (2-1) to pump out mud in the drilled hole; then the rubber pipe at the inlet of the slurry pump is drawn out, and the inclinometer pipe (4) is placed in the PVC casing pipe (1) section by section; then the PVC casing (1) is pulled out in sections, and finally fine sand is backfilled into the drilled hole to shrink the hole.
Description
Technical Field
The invention belongs to the technical field of foundation pit monitoring, and particularly relates to an auxiliary installation method of an inclinometer pipe for monitoring deep horizontal displacement of a deep foundation pit.
Background
The monitoring of the horizontal displacement of the deep foundation pit is a reliable basis for analyzing the stability of the side slope (deep foundation pit), and the accuracy of the measuring result is the guarantee for checking the construction quality and controlling the construction progress.
The monitoring of the deep horizontal displacement of foundation pit needs to install the deviational survey pipe, and according to the difference of the side slope (deep foundation pit) supporting construction form (soil nail wall, steel sheet pile, bored concrete pile, diaphragm wall), the installation method of deviational survey pipe also has the difference, if: in the cast-in-place pile support, an inclinometer pipe is bound on a reinforcement cage and then integrally placed in a drill hole; an inclinometer pipe in the steel sheet pile support is welded on the steel sheet pile through a hoop and is pressed into the soil body through hammering equipment; for the soil nailing wall supporting or slope setting excavation area, the inclination measuring pipe is usually embedded in a drill hole near the side slope, and then the gap between the inclination measuring pipe and the drill hole is backfilled, so that the method is widely applied by related technicians in the monitoring field all the time, but with the increase of practical application, the method also exposes various problems, such as: 1. the inclinometer pipe is difficult to lower, and the pipe bottom cannot reach the design depth, so that the measurement result cannot meet the standard requirement; after the inclinometer pipe is assembled, the whole tightness is good, and a high water level exists in a drill hole under the influence of a grouting protection wall and an underground water level, so that the inclinometer pipe is difficult to put down to the bottom of the hole due to high buoyancy when put down, and the hidden danger of floating exists after the inclinometer pipe is put down; 2. the hole drilling and shrinkage quality is poor, so that the accuracy of a measuring result is poor, and measuring data cannot be applied; because the mud that exists certain concentration in the drilling receives hydraulic influence simultaneously, causes the drilling backfill can't sink to the hole bottom, and along with downthehole water level decline and precipitation infiltration influence, the backfill sinks, and "hollow" appears in the drilling to rock because of the deviational survey pipe during the measurement and lead to the unable use of measured data.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an auxiliary installation method of an inclinometer pipe for monitoring the deep horizontal displacement of a deep foundation pit. The method can ensure that the inclinometer pipe can be installed to the designed elevation of the drilled hole, solve the hidden danger of later-stage upward floating of the inclinometer pipe, ensure that the backfill material can sink into the bottom of the hole more compactly, and effectively ensure the quality of the shrinkage cavity, thereby ensuring the accuracy of monitoring data.
The invention is realized by the following technical scheme:
an auxiliary installation method of an inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer comprises a PVC casing pipe (1), a drilling machine (2) provided with a slurry pump (2-1), a rubber pipe (3) and the inclinometer pipe (4). The PVC sleeve (1) and the inclinometer tube (4) are of a segmented assembly type structure, the PVC sleeve (1) comprises a sleeve (1-1) and a hoop (1-2), and the inclinometer tube (4) comprises a bottom plug (4-1), a tube body (4-2), a tube hoop (4-3) and a top cover (4-4); a drilling machine (2) drills a hole on an earth slope in advance, a slurry pump (2-1) is started in the drilling process, bentonite slurry which is mixed in advance and has a specific concentration is extracted by a rubber pipe (3), and the slurry protects the wall of the drilled hole through a hollow drill rod, so that the collapse of the hole wall in the drilling process is prevented; when the hole is drilled to the designed elevation of the hole bottom, the PVC casing pipes (1) are quickly placed in the drilled hole section by section until reaching the hole bottom; inserting a rubber pipe (3) at an inlet of a mud pump into the bottom of the PVC casing pipe (1) in the drilled hole, and starting the mud pump (2-1) to pump out mud in the drilled hole; then, the rubber pipe at the inlet of the slurry pump is drawn out, and the inclinometer pipe (4) is placed in the PVC sleeve (1) section by section until the last pipe body (4-2) of the inclinometer pipe is 30-50 cm higher than the orifice; then the PVC casing (1) is pulled out in sections, and finally fine sand is backfilled into the drilled hole to shrink the hole.
In the technical scheme, the outer diameter of the PVC sleeve (1) is 90mm, the length of the PVC sleeve is 4m, the outer diameter of the PVC sleeve should exceed the inclinometer pipe (4) by 10mm-20mm so as to facilitate the insertion of the inclinometer pipe, and the end head of the PVC sleeve (1) is provided with a threaded connector.
In the technical scheme, the sleeve (1-1) is provided with water permeable holes so that slurry in a drilled hole can rapidly enter the sleeve.
In the technical scheme, the inside of the hoop (1-2) is provided with threads, and the length is 10cm-15 cm.
In the above technical solution, the drill head outer diameter of the drilling machine (2) is typically 108 mm.
In the technical scheme, the mud pump (2-1) inputs and extracts mud into and out of the drill hole through the hollow drill rod by means of the turbine force of a diesel engine of the drilling machine (2).
In the technical scheme, the rubber tube (3) is usually a plastic hose, and the tube head is provided with an iron block with a certain weight so as to be conveniently placed in the drill hole.
In the technical scheme, the outer diameter of the inclinometer pipe (4) is 75mm, and the length of the inclinometer pipe is 2 m.
In the technical scheme, the pipe body (4-2) is fixedly connected with the pipe hoop (4-3) through screws.
The invention has the advantages and beneficial effects that:
1. the PVC casing structure provided by the invention solves the problem that the hole wall collapses in the lowering process of the inclinometer pipe so that the inclinometer pipe cannot be lowered or cannot be lowered to the designed hole bottom elevation.
2. The mud pump has the advantages that the mud pump is carried by the drilling machine, and the mud pump is used for pumping the drilled hole under the action of the PVC casing, so that a series of problems that the inclinometer pipe is difficult to lower, the hidden danger of floating is caused after the inclinometer pipe is lowered and the like are ingeniously solved.
3. The invention utilizes the slurry pump to pump the slurry in the drill hole, thereby not only solving the problem of lowering the inclinometer pipe, but also ensuring that the backfill material can be more compactly sunk into the bottom of the hole, and further effectively ensuring the shrinkage quality of the drill hole and the accuracy of monitoring data.
In addition, the invention has the advantages of convenient installation and operation, time and labor saving, better controllability and implementability, and greatly improved installation efficiency of the inclinometer.
Drawings
FIG. 1 is a schematic illustration of a drilling rig mud pumping process of the present invention;
FIG. 2 is a schematic structural view of the inclinometer pipe of the present invention after installation;
FIG. 3 is a schematic view of the spatial structure of a pvc casing according to the present invention;
wherein:
1: PVC bushing, 2: a drilling machine, 3: rubber tube, 4: inclinometer tube, 1-1: cannula, 1-2: cuff, 2-1: slurry pump, 4-1: a bottom plug, 4-2, a tube body; 4-3: pipe hoop, 4-4: and a top cover.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
An auxiliary installation method of an inclinometer pipe for monitoring the deep horizontal displacement of a deep foundation pit comprises a PVC casing pipe 1, a drilling machine 2 provided with a slurry pump 2-1, a rubber pipe 3 and an inclinometer pipe 4. The PVC sleeve 1 and the inclinometer 4 are of a segmented assembly type structure, the PVC sleeve 1 comprises a sleeve 1-1 and a hoop 1-2, and the inclinometer 4 comprises a bottom plug 4-1, a pipe body 4-2, a pipe hoop 4-3 and a top cover 4-4; the drilling machine 2 drills a hole on the soil slope in advance, the slurry pump 2-1 is started in the drilling process, the rubber pipe 3 is used for extracting bentonite slurry which is stirred in advance and has a specific concentration, and the slurry protects the wall of the drilled hole through the hollow drill rod, so that the collapse of the hole wall in the drilling process is prevented; when the hole is drilled to the designed elevation of the hole bottom, the PVC casing pipes are quickly put in the drilled hole section by section until the hole bottom is reached; inserting a rubber tube 3 at an inlet of a mud pump into the bottom of the PVC casing pipe in the drill hole, and starting the mud pump 2-1 to pump out mud in the drill hole; then, the rubber pipe at the inlet of the slurry pump is drawn out, and the inclinometer pipe is placed in the PVC sleeve 1 section by section until the last pipe body 4-2 of the inclinometer pipe is higher than the orifice by 30-50 cm; and then pulling out the PVC casing 1 in sections, and finally backfilling fine sand into the drilled hole to perform hole shrinkage.
Furthermore, the outer diameter of the PVC sleeve 1 is 90mm, the length of the PVC sleeve is 4m, the outer diameter of the PVC sleeve should exceed the length of the inclinometer tube by 410mm-20mm so as to be convenient for inserting the inclinometer tube, and the end head of the PVC sleeve 1 is provided with a threaded connector.
Furthermore, the sleeve 1-1 is provided with water permeable holes so that water and mud in the drill hole can rapidly enter the sleeve.
Furthermore, threads are arranged inside the hoop 1-2, and the length of the hoop is 10cm-15 cm.
Further, the drill 2 typically has a drill outer diameter of 108 mm.
Further, the mud pump 2-1 feeds and withdraws mud into and out of the borehole through the hollow drill pipe by means of the turbine force of the diesel engine of the drilling machine 2.
Further, the rubber tube 3 is usually a plastic hose, and the head of the rubber tube should be provided with a certain weight of iron block so as to be conveniently put down in the drill hole.
Further, the outside diameter of the inclinometer 4 is 75mm and the length is 2 m.
Further, the pipe body 4-2 and the pipe hoop 4-3 are fixedly connected through screws.
Further, specifically, the method for auxiliary installation of the inclinometer pipe for monitoring the deep horizontal displacement of the deep foundation pit comprises the following steps:
the method comprises the following steps: the bentonite is stirred into slurry with a certain concentration in advance, and the drilling machine 2 is started to drill at a position specified by the design of the top of the slope;
step two: starting a slurry pump 2-1, pumping bentonite slurry by using one end of a connecting rubber pipe 3, connecting the other end of the slurry pump 2-1 with a hollow drill rod through a hose, and enabling the slurry to enter a drill hole through the hollow drill rod for wall protection;
step three: when the hole is drilled to the designed elevation of the hole bottom, the PVC casing 1 is quickly put down section by section in the drilled hole until the hole bottom;
step four: taking the rubber tube 3 out of the mud barrel, inserting the rubber tube into the bottom of the PVC casing 1 in the drill hole, and starting a mud pump 2-1 to pump out mud in the drill hole;
step five: putting the inclinometer pipe 4 into the PVC sleeve 1 section by section until the last pipe body 4-2 is 30-50 cm higher than the orifice, and covering a top cover 4-4 on the pipe orifice;
step six: and pulling out the PVC casing 1 in sections, and then backfilling fine sand into the drilled hole to perform hole shrinkage.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (9)
1. An auxiliary installation method of an inclinometer pipe for monitoring deep horizontal displacement of a deep foundation pit is characterized by comprising the following steps: comprises a PVC casing pipe (1), a drilling machine (2) provided with a slurry pump (2-1), a rubber pipe (3) and an inclinometer pipe (4); the PVC sleeve (1) and the inclinometer tube (4) are of a segmented assembly type structure, the PVC sleeve (1) comprises a sleeve (1-1) and a hoop (1-2), and the inclinometer tube (4) comprises a bottom plug (4-1), a tube body (4-2), a tube hoop (4-3) and a top cover (4-4); a drilling machine (2) drills a hole on an earth slope in advance, a slurry pump (2-1) is started in the drilling process, bentonite slurry which is mixed in advance and has a specific concentration is extracted by a rubber pipe (3), and the slurry protects the wall of the drilled hole through a hollow drill rod, so that the collapse of the hole wall in the drilling process is prevented; when the hole is drilled to the designed elevation of the hole bottom, the PVC casing pipes (1) are quickly placed in the drilled hole section by section until reaching the hole bottom; inserting a rubber pipe (3) at an inlet of a mud pump into the bottom of the PVC casing pipe (1) in the drilled hole, and starting the mud pump (2-1) to pump out mud in the drilled hole; then, the rubber pipe at the inlet of the slurry pump is drawn out, and the inclinometer pipe (4) is placed in the PVC sleeve (1) section by section until the last pipe body (4-2) of the inclinometer pipe is 30-50 cm higher than the orifice; then the PVC casing (1) is pulled out in sections, and finally fine sand is backfilled into the drilled hole to shrink the hole.
2. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: the outer diameter of the PVC sleeve (1) is 90mm, the length of the PVC sleeve is 4m, the outer diameter of the PVC sleeve should exceed the inclinometer (4) by 10mm-20mm so as to facilitate the insertion of the inclinometer, and the end of the PVC sleeve (1) is provided with a threaded connector.
3. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: the sleeve (1-1) is provided with water permeable holes.
4. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: threads are arranged inside the hoop (1-2), and the length of the hoop is 10cm-15 cm.
5. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: the drill bit external diameter of the drilling machine (2) is 108 mm.
6. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: the mud pump (2-1) feeds and withdraws mud into and out of the borehole through the hollow drill rod by means of the turbine force of the diesel engine of the drilling machine (2).
7. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: the rubber tube (3) is a plastic hose, and the tube head is provided with an iron block with a certain weight so as to be conveniently placed in the drill hole.
8. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: the outer diameter of the inclinometer pipe (4) is 75mm, and the length of the inclinometer pipe is 2 m.
9. The auxiliary installation method of the inclinometer pipe for monitoring the horizontal displacement of the deep foundation pit deep layer according to claim 1, which is characterized in that: the pipe body (4-2) is fixedly connected with the pipe hoop (4-3) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110253.XA CN111441394A (en) | 2020-02-24 | 2020-02-24 | Auxiliary installation method of inclinometer pipe for monitoring deep horizontal displacement of deep foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010110253.XA CN111441394A (en) | 2020-02-24 | 2020-02-24 | Auxiliary installation method of inclinometer pipe for monitoring deep horizontal displacement of deep foundation pit |
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| CN111441394A true CN111441394A (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921943A (en) * | 2020-12-17 | 2021-06-08 | 南京工业大学 | Hydraulic burying and monitoring device for soil displacement and using method thereof |
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|---|---|---|---|---|
| JP2006023264A (en) * | 2004-07-05 | 2006-01-26 | Sogo Keisoku Kk | Vertical/horizontal displacement measuring apparatus for each layer in the ground |
| CN101575860A (en) * | 2009-06-01 | 2009-11-11 | 上海市第二市政工程有限公司 | Construction method for embedding inclinometer tube |
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| CN109235410A (en) * | 2018-11-02 | 2019-01-18 | 中铁四局集团有限公司 | Embedding method of inclinometer in fine sand-containing stratum |
-
2020
- 2020-02-24 CN CN202010110253.XA patent/CN111441394A/en active Pending
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| JP2006023264A (en) * | 2004-07-05 | 2006-01-26 | Sogo Keisoku Kk | Vertical/horizontal displacement measuring apparatus for each layer in the ground |
| CN101575860A (en) * | 2009-06-01 | 2009-11-11 | 上海市第二市政工程有限公司 | Construction method for embedding inclinometer tube |
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| CN106049397A (en) * | 2016-07-08 | 2016-10-26 | 四川建筑职业技术学院 | Construction method for mounting layer-divided sinking apparatus in deep compressible soil layer |
| CN109235410A (en) * | 2018-11-02 | 2019-01-18 | 中铁四局集团有限公司 | Embedding method of inclinometer in fine sand-containing stratum |
Non-Patent Citations (1)
| Title |
|---|
| 王涛等: "滑动式测斜仪在露天矿边坡监测中的应用", 《露天采矿技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921943A (en) * | 2020-12-17 | 2021-06-08 | 南京工业大学 | Hydraulic burying and monitoring device for soil displacement and using method thereof |
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Application publication date: 20200724 |
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