CN110030939B - Device and method for measuring linear displacement of surrounding rock - Google Patents
Device and method for measuring linear displacement of surrounding rock Download PDFInfo
- Publication number
- CN110030939B CN110030939B CN201910271039.XA CN201910271039A CN110030939B CN 110030939 B CN110030939 B CN 110030939B CN 201910271039 A CN201910271039 A CN 201910271039A CN 110030939 B CN110030939 B CN 110030939B
- Authority
- CN
- China
- Prior art keywords
- measuring
- telescopic
- surrounding rock
- protective sleeve
- laser range
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The application discloses a device and a method for measuring linear displacement of surrounding rock, wherein the device comprises: the protective sleeve is arranged in the measuring drill hole in front of the tunnel face of the tunnel along the longitudinal direction of the tunnel and comprises a plurality of protective sleeve units; the telescopic pipes are used for connecting the adjacent protective sleeve units, and two ends of each telescopic pipe are respectively connected with the adjacent protective sleeve units; a reflector to be arranged along a cross-sectional direction of the protection sleeve at a hole bottom of the measurement borehole; the device comprises a plurality of telescopic pipes, a plurality of laser range finders, a fixing device and a measuring device, wherein the telescopic pipes are used for being matched with the reflectors, the laser range finders are fixedly connected with corresponding telescopic sections of the telescopic pipes through the fixing device, and the measuring device is used for measuring the relative displacement between the telescopic sections and the hole bottom by measuring the distance between the laser range finders and the reflectors. The laser range finder can accurately measure the displacement value of the surrounding rock where the telescopic pipe is located, so that the deformation condition of the surrounding rock at each measuring point can be accurately measured.
Description
Technical Field
The disclosure generally relates to the technical field of geotechnical engineering deformation monitoring, in particular to a device and a method for measuring linear displacement of surrounding rock.
Background
The deformation of the surrounding rock of the foundation pit is one of the most important physical parameters in foundation pit engineering detection, and has very important significance for knowing the construction quality and the rationality of a construction scheme and guiding field construction operation; along with the vigorous development of foundation pit engineering such as deep foundation pits, special soil foundation pits and the like in recent years, a device capable of accurately and conveniently measuring the deformation of the foundation pit surrounding rock is urgently needed, and the device brings about a small challenge to the existing monitoring instrument.
At present, a common method for measuring the displacement of the surrounding rock in the foundation pit engineering is a total-station electronic tacheometer measurement method. The method for measuring the displacement of the surrounding rock of the foundation pit by using the total-station electronic tacheometer has the advantages of high speed, high precision, strong function and high automation degree; the method has the defects that the deformation of the surface surrounding rock of the foundation pit surrounding rock exposed in the air can only be measured, the deformation of the surrounding rock of the trenchless section in a certain range in the exposed surface can not be measured, and the measurement data can not be measured in real time; in addition, along with the continuous blasting of face, the face that awaits measuring constantly advances, needs many times to erect a station, and work is comparatively loaded down with trivial details and easily causes human error. But as foundation pit surrounding rock displacement measurement and safety precaution, the real-time of data is very important.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a solution that can effectively monitor the internal displacement of the surrounding rock of the foundation pit.
In a first aspect, an embodiment of the present application provides a surrounding rock linear displacement measuring device, including:
the protective sleeve is arranged in the measuring drill hole in front of the tunnel face of the tunnel along the longitudinal direction of the tunnel and comprises a plurality of protective sleeve units;
the telescopic pipe is used for connecting adjacent protective sleeve units, two ends of each telescopic pipe are respectively connected with the adjacent protective sleeve units, the middle main body part of each telescopic pipe is a telescopic section, each telescopic section is an organ type telescopic pipe capable of longitudinally stretching along the protective sleeve, and each telescopic section is fixedly connected with surrounding rocks through a grouting body;
a reflector to be arranged along a cross-sectional direction of the protection sleeve at a hole bottom of the measurement borehole;
the device comprises a plurality of telescopic pipes, a plurality of laser range finders, a fixing device and a measuring device, wherein the telescopic pipes are used for being matched with the reflectors, the laser range finders are fixedly connected with corresponding telescopic sections of the telescopic pipes through the fixing device, and the measuring device is used for measuring the relative displacement between the telescopic sections and the hole bottom by measuring the distance between the laser range finders and the reflectors.
The protective sleeve unit is connected with the telescopic pipe through threads, so that the structure is simple, and the construction is rapid.
The fixing device comprises a fixing rod arranged along the cross section direction of the protective sleeve, two ends of the fixing rod are fixedly connected with two sides of the inner wall of the organ type telescopic pipe respectively, and a fixing piece used for fixing the laser range finder is arranged on the fixing rod. By adopting the mode, the installation and the operation are simple and convenient, and the construction is convenient.
The fixing device further comprises an auxiliary fixing piece longitudinally arranged along the protective sleeve, two ends of the auxiliary fixing piece are respectively and fixedly connected with the adjacent protective sleeve, and the laser range finder is connected with the auxiliary fixing piece in a mode of only relatively sliding along the longitudinal direction of the auxiliary fixing piece. The direction that can guarantee laser range finder is vertical unanimous with protective case all the time to guarantee that laser range finder and reflector remain good cooperation all the time, improve measuring accuracy.
The protective sleeve adopts an HPVC hard pipe.
Each laser range finder with flexible pipe one-to-one, the displacement condition of every flexible pipe position department of measurement that can be convenient.
The laser range finders are arranged in staggered positions along the cross section direction of the protective sleeve, so that the laser range finders are matched with the reflector, and measurement of the measuring point of each telescopic pipe is realized.
The bottom of protective case is equipped with inside sealed round platform pipe, the reflector is laid the bottom face of round platform pipe, the cross-section diameter of round platform pipe bottom end face is greater than the diameter of protective case, establishes the reflector and can be more convenient realization laser range finder's distance measurement on the bottom face of round platform pipe to prevent that the slip casting body from pouring into.
The device for measuring the linear displacement of the surrounding rock further comprises a control system, and the control system is in communication connection with the laser range finder in a wired and/or wireless mode.
A method for measuring the linear displacement of surrounding rocks comprises the following steps:
step 1: drilling a measuring borehole in front of the tunnel face;
step 2: placing a surrounding rock linear displacement measuring device into the measuring borehole;
and step 3: and grouting is carried out between the measuring drill hole and the hole of the protective sleeve, and after slurry is solidified, the displacement value of the surrounding rock in the drill hole is measured through the distance monitoring value between each laser range finder and the reflector.
And in the step 3, cement mortar is injected between the measuring drill hole and the hole of the protective sleeve.
According to the device and the method for measuring the linear displacement of the surrounding rock, the telescopic pipe of the displacement measuring device is fixedly connected with the surrounding rock through the grouting body, and the joint of the telescopic pipe and the middle main body part of the telescopic pipe and the fixed rod is used as a measuring point for measuring a drilled hole. Because the part of the pipe body in the middle of the telescopic pipe can stretch out and draw back longitudinally along the drilled hole, when the surrounding rock deforms, the telescopic pipe can displace along with the deformation of the surrounding rock, the fixed rod fixedly connected with the telescopic pipe and the laser range finder can displace longitudinally along the drilled hole, and at the moment, the laser range finder can accurately measure the displacement value of the surrounding rock where the telescopic pipe is located, so that the deformation condition of the surrounding rock at each measuring point can be accurately measured. The middle pipe body of the telescopic pipe is in an organ type shape, so that the contact area with a grouting body can be increased, and the telescopic pipe is better solidified with the grouting body, so that the deformation of surrounding rocks can be measured more accurately.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of the upper structure of the apparatus of the present invention;
FIG. 2 is a schematic view of the upper cross-sectional structure of the apparatus of the present invention;
FIG. 3 is a schematic view of the lower structure of the apparatus of the present invention.
In the figure: 1-protecting the sleeve; 2-cement mortar; 3-a telescopic pipe; 301-concertina tubing; 401-a fixture; 402-auxiliary fixing member; 5-a conductive cable; 6-a circular truncated cone tube; 7-a reflector; 8-a control system; 9-laser rangefinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are only a part, and not all, of the present invention. For convenience of description, only portions related to the invention are shown in the drawings.
It will be readily understood that the components of the embodiments of the present invention, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations without departing from the scope of the present invention. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, a device for measuring the linear displacement of surrounding rock comprises a protective sleeve 1, an extension tube 3, a plurality of fixing devices, a laser range finder 9 and a reflector 7.
Wherein, protective case 1 includes a plurality of protective case 1 units for along the tunnel vertically locate the tunnel face the place ahead in the measurement drilling, preferentially adopt the HPVC hard tube.
The protective sleeve 1 units are connected by telescopic pipes 3. The middle main body part of the extension tube 3 is an extension section, and the extension section is an organ type extension tube 301 which can extend and retract along the longitudinal direction of the protective sleeve 1 and is used for being fixedly connected with surrounding rocks through grouting; two ends of the extension tube 3 are respectively connected with the adjacent protective sleeve 1 units through threads.
The fixing device for fixing the laser range finder 9 is arranged at the position of each organ type extension tube 301 and comprises a fixing rod arranged along the cross section direction of the protection sleeve 1, two ends of the fixing rod are fixedly connected with two sides of the inner wall of the organ type extension tube 301 respectively, and a fixing piece 401 for fixing the laser range finder is arranged on the fixing rod. The form of the fixing member 401 includes, but is not limited to, a clip for clipping the laser range finder, a binding rope for binding the connection, and the like.
The fixing device further comprises an auxiliary fixing member 402 arranged along the longitudinal direction of the protection sleeve 1, both ends of the auxiliary fixing member 402 are fixedly connected with the adjacent protection sleeve 1, respectively, and the laser range finder is connected with the auxiliary fixing member 402 in a manner of relatively sliding only along the longitudinal direction of the auxiliary fixing member 402. The both ends of auxiliary fixing piece 402 can be through threaded sleeve and adjacent protective sleeve 1 unit fixed connection, and auxiliary fixing piece 402 can adopt different concrete structural style, for example be equipped with on the auxiliary fixing piece 402 along the spout of vertical setting, be equipped with on laser range finder for with spout complex slider to this realizes the sliding connection of laser range finder along auxiliary fixing piece 402.
The laser distance measuring instrument adopts a distance measuring device of DIMETIX DLS-C in Switzerland. The setting positions of the laser range finders are staggered along the cross section direction of the protective sleeve 1, so that the laser range finders are matched with the reflector, and the measurement of the measuring point of each telescopic pipe 3 is realized.
The bottom end of the protective sleeve 1 is provided with the internally sealed circular truncated cone pipe 6, the reflector 7 is laid on the bottom end face of the circular truncated cone pipe 6, the diameter of the section of the bottom end face of the circular truncated cone pipe 6 is larger than that of the protective sleeve 1, the reflector 7 is arranged on the bottom end face of the circular truncated cone pipe 6, distance measurement of the laser range finder can be achieved more conveniently, and grouting bodies are prevented from being poured in.
The device for measuring the linear displacement of the surrounding rock further comprises a control system 8, wherein the control system is in communication connection with the laser range finder through a conducting cable 5 and a data line, and controls the laser range finder and collects data.
The embodiment of the application also provides a method for measuring the linear displacement of the surrounding rock, which comprises the following steps:
step 1: drilling a measuring hole in front of the tunnel face: in rock, concrete or earth, a borehole is drilled, the length of which is determined according to the depth range to be measured (typically not more than 30 m).
Step 2: the protective sleeve 11 at the bottommost part is connected with one end of a circular truncated cone tube 66 through an extension tube 3, and a reflector 7 is arranged in the circular truncated cone tube 6. Connecting the protective sleeve 1 units through the telescopic pipes 3, installing a fixing device and a laser range finder at the telescopic pipes 3, ensuring that a laser of the laser range finder is aligned with a reflector, and inserting the assembled protective sleeve 1 into a drilled hole while assembling the protective sleeve 1 units;
and step 3: and injecting cement mortar 2 between the measuring drill hole and the hole of the protective sleeve 1, and immediately carrying out initial measurement after the slurry is solidified.
And 4, step 4: and controlling each laser range finder to carry out range finding through the control system at each subsequent measurement.
And 5: along with the continuous blasting of the face in the place ahead of the palm, protective case 1 at rear portion can constantly expose, dismantle protective case 1 who exposes, realize the reuse of device.
The embodiment of the application has the following advantages:
1. the precision is high, multiple measurement and analysis can be realized by using the laser range finder, and the precision is greatly improved;
2. the installation and the operation are simple and convenient;
3. the method can be recycled for many times, is not influenced by construction dynamics, can monitor the displacement change inside the foundation pit surrounding rock in real time, and provides data information for safety early warning.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A device for measuring the linear displacement of surrounding rock, which is characterized by comprising:
the protective sleeve is arranged in the measuring drill hole in front of the tunnel face of the tunnel along the longitudinal direction of the tunnel and comprises a plurality of protective sleeve units;
the telescopic pipe is used for connecting adjacent protective sleeve units, two ends of each telescopic pipe are respectively connected with the adjacent protective sleeve units, the middle main body part of each telescopic pipe is a telescopic section, each telescopic section is an organ type telescopic pipe capable of longitudinally stretching along the protective sleeve, and each telescopic section is fixedly connected with surrounding rocks through a grouting body;
a reflector to be arranged along a cross-sectional direction of the protection sleeve at a hole bottom of the measurement borehole;
the device comprises a plurality of telescopic pipes, a plurality of laser range finders, a fixing device and a measuring device, wherein the telescopic pipes are used for being matched with the reflectors, the laser range finders are fixedly connected with corresponding telescopic sections of the telescopic pipes through the fixing device, and the measuring device is used for measuring the relative displacement between the telescopic sections and the hole bottom by measuring the distance between the laser range finders and the reflectors.
2. The device for measuring the linear displacement of the surrounding rock as claimed in claim 1, wherein the protection sleeve unit is connected with the telescopic pipe through threads.
3. The device as claimed in claim 1, wherein the fixing device comprises a fixing rod disposed along the cross section of the protective casing, two ends of the fixing rod are respectively fixedly connected to two sides of the inner wall of the concertina type telescopic tube, and a fixing member for fixing the laser distance measuring instrument is disposed on the fixing rod.
4. The device as claimed in claim 3, wherein the fixing device further comprises an auxiliary fixing member disposed along the longitudinal direction of the protection sleeve, two ends of the auxiliary fixing member are fixedly connected to the adjacent protection sleeves, respectively, and the laser range finder is connected to the auxiliary fixing member in a manner of relatively sliding only along the longitudinal direction of the auxiliary fixing member.
5. The device for measuring the linear displacement of the surrounding rock according to claim 1, wherein each laser range finder corresponds to one telescopic pipe.
6. The device as claimed in claim 1, wherein the laser distance measuring instruments are arranged at positions offset from each other in the cross-sectional direction of the protective sleeve.
7. The device for measuring the linear displacement of the surrounding rock as claimed in claim 1, wherein an internally sealed circular truncated cone is arranged at the bottom end of the protective sleeve, and the reflective mirror is paved on the bottom end surface of the circular truncated cone.
8. The device for measuring the linear displacement of the surrounding rock according to claim 1, further comprising a control system, wherein the control system is in communication connection with the laser range finder in a wired and/or wireless manner.
9. The measuring method of the device for measuring the linear displacement of the surrounding rock according to any one of claims 1 to 8, characterized by comprising the following steps:
step 1: drilling a measuring borehole in front of the tunnel face;
step 2: placing a surrounding rock linear displacement measuring device into the measuring borehole;
and step 3: and grouting is carried out between the measuring drill hole and the hole of the protective sleeve, and after slurry is solidified, the displacement value of the surrounding rock in the drill hole is measured through the distance monitoring value between each laser range finder and the reflector.
10. The measuring method of the apparatus for measuring the linear displacement of the surrounding rock according to claim 9, wherein cement mortar is injected between the measuring bore and the hole of the protective sleeve in the step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271039.XA CN110030939B (en) | 2019-04-04 | 2019-04-04 | Device and method for measuring linear displacement of surrounding rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271039.XA CN110030939B (en) | 2019-04-04 | 2019-04-04 | Device and method for measuring linear displacement of surrounding rock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110030939A CN110030939A (en) | 2019-07-19 |
| CN110030939B true CN110030939B (en) | 2021-08-10 |
Family
ID=67237539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910271039.XA Active CN110030939B (en) | 2019-04-04 | 2019-04-04 | Device and method for measuring linear displacement of surrounding rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110030939B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242287A (en) * | 2019-07-22 | 2019-09-17 | 四川华芯项目管理有限公司 | A kind of Tunneling by mining method perforation hole size scalability detection device and application method |
| CN110468888A (en) * | 2019-07-31 | 2019-11-19 | 青岛理工大学 | A kind of miniature steel pipe stake body displacement monitor and method |
| CN111551121A (en) * | 2020-06-25 | 2020-08-18 | 安徽理工大学 | Device and method for monitoring displacement of surrounding rock roof of roadway |
| CN114910004B (en) * | 2022-05-26 | 2023-01-31 | 中国矿业大学 | Telescopic multipoint displacement meter based on laser ranging and application method thereof |
| CN116399247B (en) * | 2023-02-13 | 2024-05-10 | 长江水利委员会长江科学院 | Large-range laser displacement measuring instrument suitable for surrounding rock large deformation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2354158Y (en) * | 1998-12-29 | 1999-12-15 | 中国科学院武汉岩土力学研究所 | Digital panoramic drilling pick-up camera |
| CN103363904A (en) * | 2013-06-26 | 2013-10-23 | 同济大学 | Measuring device and measuring method for layering horizontal displacement of base pit enclosing structure |
| CN106840014A (en) * | 2016-12-30 | 2017-06-13 | 绍兴文理学院 | A kind of method for monitoring face along tunnel axial deformation |
| WO2017142922A1 (en) * | 2016-02-19 | 2017-08-24 | Baker Hughes Incorporated | Systems and methods for measuring bending, weight on bit and torque on bit while drilling |
| CN207649594U (en) * | 2017-12-29 | 2018-07-24 | 淮南矿业(集团)有限责任公司 | A kind of coal mine roadway development end surrouding rock deformation monitoring device |
| CN207649556U (en) * | 2017-12-29 | 2018-07-24 | 中国科学院武汉岩土力学研究所 | A kind of the country rock linear displacement and temperature measuring equipment of distributed fiberoptic sensor |
-
2019
- 2019-04-04 CN CN201910271039.XA patent/CN110030939B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2354158Y (en) * | 1998-12-29 | 1999-12-15 | 中国科学院武汉岩土力学研究所 | Digital panoramic drilling pick-up camera |
| CN103363904A (en) * | 2013-06-26 | 2013-10-23 | 同济大学 | Measuring device and measuring method for layering horizontal displacement of base pit enclosing structure |
| WO2017142922A1 (en) * | 2016-02-19 | 2017-08-24 | Baker Hughes Incorporated | Systems and methods for measuring bending, weight on bit and torque on bit while drilling |
| CN106840014A (en) * | 2016-12-30 | 2017-06-13 | 绍兴文理学院 | A kind of method for monitoring face along tunnel axial deformation |
| CN207649594U (en) * | 2017-12-29 | 2018-07-24 | 淮南矿业(集团)有限责任公司 | A kind of coal mine roadway development end surrouding rock deformation monitoring device |
| CN207649556U (en) * | 2017-12-29 | 2018-07-24 | 中国科学院武汉岩土力学研究所 | A kind of the country rock linear displacement and temperature measuring equipment of distributed fiberoptic sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110030939A (en) | 2019-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110030939B (en) | Device and method for measuring linear displacement of surrounding rock | |
| RU2331753C2 (en) | Downhole tool | |
| KR101162918B1 (en) | Method of measuring underground displacement using inclinometer | |
| WO2019233105A1 (en) | Device and method for measuring flow rate, flow direction, and geological parameter of deep-well cross-hole groundwater | |
| CN103513016B (en) | Adopt the soft rock multi-measuring point detecting earth stress method of sensing post | |
| CN105019485B (en) | A kind of excavation of foundation pit dead load test on pile foundation detection method | |
| CN109238161A (en) | A kind of observation device and observation method of tunnel surface absolute convergence amount | |
| CN104453705B (en) | Secondary forming method for large-hole-diameter cast-in-place pile rotary drilling rig | |
| CN113551637B (en) | Monitoring device and method for surrounding rock deformation in whole process of tunnel construction based on TBM | |
| CN106353482A (en) | Testing system and testing method for disturbance of tunnel construction on side soil body | |
| Kavvadas | Monitoring and modelling ground deformations during tunnelling | |
| JP3271751B2 (en) | Settlement measuring device | |
| CN110863477B (en) | Long-distance horizontal freezing hole optical fiber gyroscope inclination measuring method | |
| CN102183230B (en) | An anchoring device of a datum mark in a boring | |
| CN216525808U (en) | Monitoring system for pore pressure and inclination of soil body around constructed bridge pile | |
| CN108755648A (en) | Prefabricated inclination measurement device | |
| CN106027965A (en) | Panorama camera shooting method of intelligent digital drilling panoramic camera device | |
| CN207649594U (en) | A kind of coal mine roadway development end surrouding rock deformation monitoring device | |
| JP6019011B2 (en) | How to install the preceding underground displacement meter | |
| CN206223141U (en) | A kind of auto monitoring and measurement system for foundation ditch and tunnel deformation | |
| CN106522253B (en) | Drill precise holes and the construction method of grouting on a kind of big depth of water toe board | |
| CN210460560U (en) | Bushing type small core coring device | |
| CN104153353A (en) | Method for determining elevation of bored pile through cross line laser | |
| CN208501659U (en) | Prefabricated inclination measurement device | |
| CN212454399U (en) | Sleeve type ground stress test matching positioning and ranging device |
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 |