CN115094858A - High-precision dam foundation grouting stratum lift detection device - Google Patents
High-precision dam foundation grouting stratum lift detection device Download PDFInfo
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- CN115094858A CN115094858A CN202210765590.1A CN202210765590A CN115094858A CN 115094858 A CN115094858 A CN 115094858A CN 202210765590 A CN202210765590 A CN 202210765590A CN 115094858 A CN115094858 A CN 115094858A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Soil Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a high-precision dam foundation grouting stratum lift detection device, and relates to the technical field of dam foundation grouting. It includes the mount, the backup pad, the fixed plate, telescoping device A, the dead lever, mount side-mounting support plate, there is a plurality of through-hole in the backup pad, the fixed plate is all installed to the side about the mount, the fixed plate downside is arranged in to telescoping device A, dead lever detachable connects at telescoping device A downside, the dead lever includes the drilling rod, the pressure measurement module, the drill bit, pressure measurement module both ends detachable connection drilling rod and drill bit respectively, still include detection device, telescoping device B, the coil main part, flexible connection device, detect the head, detection device installs on the mount, side department on the mount inboard is arranged in to telescoping device B, coil main part one side and telescoping device B rigid coupling, the opposite side passes through flexible connection device with detecting the head and is connected. The invention has the beneficial effects that: the device is easy to fix, the equipment is not easy to loosen, the overhaul cost is low, and the detection precision is high.
Description
Technical Field
The invention relates to the technical field of dam foundation grouting, in particular to a high-precision dam foundation grouting stratum lift detection device.
Background
The grouting is that slurry or chemical solution with gelling property is pressed into rock cracks or foundation pores, surrounding rock cracks or tunnels to be grouted by a machine according to a specified proportion or concentration, and the slurry is pressed into the rock cracks or foundation pores, surrounding rock cracks or tunnels to fill the joints, pores, gaps, cavities or cracks, so that the effects of consolidation, adhesion, seepage prevention, bearing strength improvement, deformation resistance, stress transmission and the like are achieved.
The dam foundation grouting is an important link for reinforcing and seepage preventing of a dam, the grouting engineering is a concealed engineering, the improper control of the grouting process easily causes accidents such as stratum uplifting and dislocation, secondary damage of the grouted stratum is caused, the safety performance of the dam is seriously affected, the grouting pressure, the grout injection rate and the stratum fracture are all reasons for uplifting deformation of the dam foundation stratum, and the integrity and the seepage preventing capability of the dam foundation are seriously affected due to cracks caused by uplifting deformation.
The existing dam foundation grouting stratum lifting detection device is mostly fixed through foundation bolts, time and labor are wasted, the detection device is inconvenient, a part of devices are fixed by inserting fixing rods into the ground through hydraulic devices, the fixing looseness can be caused due to the vibration of the stratum after the dam foundation grouting stratum works for the detection result is inaccurate, and after a period of time, the cost is high due to the fact that the whole fixing rods need to be replaced due to abrasion.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-precision dam foundation grouting stratum lift detection device which is easy to fix, low in maintenance cost and high in detection precision, and equipment is not easy to loosen.
In order to achieve the above object, the present invention is solved by the following technical solutions:
a high-precision dam foundation grouting stratum lift detection device comprises a fixing mechanism and a detection mechanism, wherein the fixing mechanism comprises a fixing frame, a supporting plate, a fixing plate, a telescopic device A and a fixing rod, the supporting plate is installed on the lower side of the fixing frame, a plurality of through holes are formed in the supporting plate, the fixing plate is installed on the left side and the right side of the fixing frame, the telescopic device A is arranged on the lower side of the fixing plate, the fixing rod is detachably connected to the lower side of the telescopic device A, the fixing rod comprises a drill rod, a pressure measuring module and a drill bit, the two ends of the pressure measuring module are detachably connected with the drill rod and the drill bit respectively, the detection mechanism comprises a detection device, a telescopic device B, a coil main body, a flexible connection device and a detection head, the detection device is installed on the fixing frame, and the telescopic device B is arranged on the upper side of the inner side of the fixing frame, one side of the coil body is fixedly connected with the telescopic device B, and the other side of the coil body is connected with the detection head through the flexible connecting device.
Preferably, the flexible connection device comprises a sleeve, a sliding rod and a ball, one end of the sliding rod is arranged in the sleeve, the other end of the sliding rod is connected with the detection head, a sliding groove is formed between the sliding rod and the sleeve, and the ball is arranged in the sliding groove.
Preferably, the flexible connecting device further comprises a locking mechanism, when the flexible connecting device does not work, the sliding rod and the sleeve are fixed through the locking mechanism, when the flexible connecting device works, the locking mechanism is unlocked, and the sliding rod is connected with the sleeve in a sliding mode.
Preferably, during operation, the detection head passes through the through hole of backup pad and contacts ground, the dead lever passes the through hole of backup pad and gets into ground inside, fixes the mount.
Preferably, telescoping device A includes screw motor, lead screw, installed part, screw motor installs the fixed plate downside, lead screw one end is connected screw motor, the other end is connected the installed part, the dead lever is connected the installed part.
Preferably, the pressure measuring module is electrically connected with the screw motor, the pressure measuring module detects a pressure value applied to the screw motor in real time in a grouting working process, when the detected pressure is lower than a set value, the equipment has a loosening risk, in order to guarantee lifting detection accuracy, the pressure measuring module feeds a signal back to the screw motor, the screw motor is started, the screw rod is used for downwards pressurizing again until the pressure value detected by the pressure measuring module is not lower than the set value, the pressure measuring module feeds the signal back to the screw motor again, and the screw motor stops running, so that the equipment is guaranteed to be fixed with the ground all the time in the detection process.
Preferably, the telescopic device B comprises a hydraulic cylinder, a piston rod, a connecting plate and a connecting screw, the hydraulic cylinder is installed at the upper side of the inner side of the fixing frame, the piston rod is arranged at the lower side of the hydraulic cylinder, the piston rod is fixedly connected with the connecting plate, and the connecting plate is connected with the coil body through the connecting screw.
Preferably, the invention further comprises a connecting wire, and the detection device is connected with the coil main body through the connecting wire.
Preferably, limiting plates are further arranged on the left side and the right side of the fixing frame, the limiting plates are provided with holes, penetrate through the screw rod and are arranged below the screw motor.
Preferably, the top of the fixing frame is further provided with a hanging ring, and the hanging ring is symmetrical about the central axis of the fixing frame.
Preferably, the fixing rods are arranged in 4 groups, and the left group and the right group are respectively arranged in 2 groups and are symmetrically arranged.
According to the high-precision dam foundation grouting stratum lifting detection device, the detection head is connected with the coil main body through the flexible connection device, the flexible connection device comprises a sleeve, a sliding rod and balls, one end of the sliding rod is arranged in the sleeve, the other end of the sliding rod is connected with the detection head, a sliding groove is formed between the sliding rod and the sleeve, and the balls are arranged in the sliding groove; the two ends of the pressure measuring module are detachably connected with the drill rod and the drill bit respectively, the drill bit is worn or the pressure measuring module is damaged, and the pressure measuring module can be replaced independently, so that the maintenance is convenient, and the cost is reduced; the pressure measuring module is electrically connected with the screw motor, the pressure measuring module detects the pressure value received in real time in the grouting working process, when the measured pressure is lower than a set value, the equipment has a loosening risk, in order to ensure the lifting detection accuracy, the pressure measuring module feeds back a signal to the screw motor, the screw motor is started, the screw rod is used for pressurizing downwards again until the pressure value measured by the pressure measuring module is not lower than the set value, the pressure measuring module feeds back the signal to the screw motor again, and the screw motor stops running, so that the equipment is always fixed with the ground in the detection process and is not easy to loosen.
The invention has the beneficial effects that: through the light fixed of helical electric motor, do not need artifical fixed, labour saving and time saving, through pressure measurement module real-time detection pressure that receives, not hard up risk appears, but automatic control equipment consolidates, makes the equipment difficult not hard up, and drilling rod, drill bit, pressure measurement module are detachable design, if appear damaging can change alone, and the device overhauls with low costs, and the testing process guarantees that equipment and ground are firm to be connected, and no equipment error for detect the precision and improve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be discussed below, it is obvious that the technical solutions described in conjunction with the drawings are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings can be obtained according to the embodiments shown in the drawings without creative efforts.
Fig. 1 is a front view of the overall structure of the present invention.
Fig. 2 is a right side view of the overall structure of the present invention.
Fig. 3 is a partial enlarged view of the present invention at a.
Fig. 4 is an enlarged partial sectional view at B of the present invention.
In the figure: 1. the device comprises a fixing frame, 2, a supporting plate, 3, a fixing plate, 4, a limiting plate, 5, a screw motor, 6, a lead screw, 7, an installation part, 8, a drill rod, 9, a pressure measuring module, 10, a drill bit, 11, a lifting ring, 12, a detection device, 13, a connecting wire, 14, a hydraulic cylinder, 15, a piston rod, 16, a connecting plate, 17, a connecting screw, 18, a coil main body, 19, a sleeve, 20, a sliding rod, 21, a ball, 22 and a detection head.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without the need for inventive work, are within the scope of the present invention.
The embodiment of the invention provides a high-precision dam foundation grouting stratum lift detection device which is easy to fix, low in maintenance cost and high in detection precision, and equipment is not easy to loosen.
As shown in fig. 1 to 4, the high-precision dam foundation grouting stratum lifting detection device comprises a fixing mechanism and a detection mechanism, wherein the fixing mechanism comprises a fixing frame 1, a supporting plate 2, a fixing plate 3, a telescopic device a and fixing rods, the supporting plate 2 is installed on the lower side of the fixing frame 1, a plurality of through holes are formed in the supporting plate 2, the fixing plate 3 is installed on the left side and the right side of the fixing frame 1, the telescopic device a is arranged on the lower side of the fixing plate 3, the fixing rods are detachably connected to the lower side of the telescopic device a, the fixing rods are provided with 4 groups, the left group and the right group are symmetrically installed, the telescopic device a comprises a screw motor 5, a screw rod 6 and an installation part 7, the screw motor 5 is installed on the lower side of the fixing plate 3, one end of the screw rod 6 is connected with the screw motor 5, and the other end of the screw rod is connected with the installation part 7, the left side and the right side of the fixing frame 1 are further provided with limiting plates 4, the limiting plates 4 are provided with holes, penetrate through the screw rod 6 and are arranged below the screw motor 5, the fixing rod is connected with the mounting part 7 and comprises a drill rod 8, a pressure measuring module 9 and a drill bit 10, two ends of the pressure measuring module 9 are detachably connected with the drill rod 8 and the drill bit 10 respectively, the pressure measuring module 9 is electrically connected with the screw motor 5, in the grouting working process, the pressure measuring module 9 detects the pressure value received in real time, when the detected pressure is lower than a set value, the equipment has a loosening risk, in order to ensure the lifting detection accuracy, the pressure measuring module 9 feeds a signal back to the screw motor 5, the screw motor 5 is started, the screw rod 6 is pressurized downwards again until the pressure measuring module 9 detects that the pressure value is not lower than the set value, and the pressure measuring module 9 feeds back the signal to the screw motor 5 again, the spiral motor 5 stops running so as to ensure that the equipment is fixed with the ground all the time in the detection process, the top of the fixed frame 1 is also provided with a lifting ring 11, the lifting ring 11 is symmetrical about the central axis of the fixed frame 1, the detection mechanism comprises a detection device 12, a telescopic device B, a coil main body 18, a flexible connecting device and a detection head 22, the detection device 12 is arranged on the fixed frame 1, the telescopic device B is arranged at the upper side surface of the inner side of the fixed frame 1, the invention also comprises a connecting wire 13, the detection device 12 is connected with the coil main body 18 through the connecting wire 13, one side of the coil main body 18 is fixedly connected with the telescopic device B, the other side of the coil main body is connected with the detection head 22 through the flexible connecting device, the telescopic device B comprises a hydraulic cylinder 14, a piston rod 15, a connecting plate 16 and a connecting screw 17, pneumatic cylinder 14 is installed side department on the 1 inboard of mount, the 14 downside of pneumatic cylinder is provided with piston rod 15, piston rod 15 with connecting plate 16 rigid coupling, connecting plate 16 with coil main part 18 passes through connecting screw 17 connects, flexible connection device includes sleeve 19, slide bar 20, ball 21, slide bar 20 one end is arranged in sleeve 19, the other end is connected detect head 22, be provided with the spout between slide bar 20 and the sleeve 19, ball 21 is arranged in the spout, and in the during operation, detect head 22 and pass the through-hole contact ground of backup pad 2, the dead lever passes inside the through-hole entering ground of backup pad 2, and is fixed mount 1.
The working principle of the invention is as follows:
before use, the lifting device is connected with the lifting ring 11, the lifting device is placed in a detection area, after the power supply is connected, the spiral motor 5 is started, the fixed rod moves downwards through the lead screw 6 and penetrates through the through hole in the supporting plate 2 to enter the ground, so that the fixed frame 1 is fixed on the ground, the hydraulic cylinder 14 is started to enable the piston rod 15 to move downwards to drive the coil main body 18 and the detection head 22 to move downwards, the detection head 22 penetrates through the through hole in the supporting plate 2 to be in contact with the ground, and no stress is applied between the sleeve 19 and the slide rod 20; when the device is used, the detection device 12 is started, the detection head 22 detects the ground lifting displacement condition, the ground lifting displacement condition is converted into an electric signal through the coil main body 18, the electric signal is transmitted to the detection device 12 through the connecting wire 13, the detection device 12 feeds back the electric signal to a user, the pressure measuring module 9 detects the pressure value received in real time in the grouting working process, when the detected pressure is lower than a set value, equipment has a loosening risk, in order to ensure the lifting detection accuracy, the pressure measuring module 9 feeds the signal back to the screw motor 5, the screw motor 5 is started, the screw rod 6 is used for downwards pressurizing again until the pressure value detected by the pressure measuring module 9 is not lower than the set value, the pressure measuring module 9 feeds back the signal to the screw motor 5 again, and the screw motor 5 stops running, so that the equipment is always fixed with the ground in the detection process; after the use is finished, the spiral motor 5 reversely rotates, the fixed rod is retracted, the piston rod 15 is retracted through the hydraulic cylinder 14, the detection head 22 is driven to ascend, and the lifting device lifts the detection device away from a detection area.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (8)
1. The utility model provides a high accuracy dam foundation grouting stratum lift detection device, includes fixed establishment, detection mechanism, its characterized in that: the fixing mechanism comprises a fixing frame (1), a supporting plate (2), a fixing plate (3), a telescopic device A and a fixing rod, wherein the supporting plate (2) is installed on the lower side of the fixing frame (1), a plurality of through holes are formed in the supporting plate (2), the fixing plate (3) is installed on the left side surface and the right side surface of the fixing frame (1), the telescopic device A comprises a spiral motor (5), a lead screw (6) and an installation part (7), the spiral motor (5) is installed on the lower side of the fixing plate (3), one end of the lead screw (6) is connected with the spiral motor (5), the other end of the lead screw is connected with the installation part (7), the fixing rod is detachably connected with the installation part (7), the fixing rod comprises a drill rod (8), a pressure measuring module (9) and a drill bit (10), the two ends of the pressure measuring module (9) are detachably connected with the drill rod (8) and the drill bit (10) respectively, the pressure measuring module (9) is electrically connected with the screw motor (5), the pressure measuring module (9) detects the pressure value borne by the screw motor (5) in real time in the grouting working process, when the detected pressure is lower than a set value, the pressure measuring module (9) feeds a signal back to the screw motor (5), the screw motor (5) is started, the screw rod (6) pressurizes downwards again until the pressure value detected by the pressure measuring module (9) is not lower than the set value, the pressure measuring module (9) feeds the signal back to the screw motor (5) again, the screw motor (5) stops running, so that the equipment is ensured to be fixed with the ground all the time in the detection process, the detection mechanism comprises a detection device (12), a telescopic device B, a coil main body (18), a flexible connection device and a detection head (22), and the detection device (12) is installed on the fixing frame (1), the telescopic device B is arranged on the upper side face of the inner side of the fixed frame (1), one side of the coil main body (18) is fixedly connected with the telescopic device B, and the other side of the coil main body is connected with the detection head (22) through the flexible connecting device.
2. The device for detecting the uplift of the grouting stratum of the high-precision dam foundation as claimed in claim 1, is characterized in that: the flexible connection device comprises a sleeve (19), a sliding rod (20) and a ball (21), one end of the sliding rod (20) is arranged in the sleeve (19), the other end of the sliding rod is connected with the detection head (22), a sliding groove is formed between the sliding rod (20) and the sleeve (19), and the ball (21) is arranged in the sliding groove.
3. The device for detecting the uplift of the grouting stratum of the high-precision dam foundation as claimed in claim 1, is characterized in that: during operation, the detection head (22) passes through the through hole of the supporting plate (2) to contact the ground, and the fixing rod passes through the through hole of the supporting plate (2) to enter the ground to fix the fixing frame (1).
4. The device for detecting the uplift of the grouting stratum of the high-precision dam foundation as claimed in claim 1, is characterized in that: telescoping device B includes pneumatic cylinder (14), piston rod (15), connecting plate (16), connecting screw (17), pneumatic cylinder (14) are installed side department on mount (1) inboard, pneumatic cylinder (14) downside is provided with piston rod (15), piston rod (15) with connecting plate (16) rigid coupling, connecting plate (16) with coil main part (18) are passed through connecting screw (17) are connected.
5. The device for detecting the lifting of the grouting stratum of the high-precision dam foundation according to claim 1, characterized in that: the coil body (18) is connected with the detection device (12) through the connecting line (13).
6. The device for detecting the uplift of the grouting stratum of the high-precision dam foundation as claimed in claim 1, is characterized in that: limiting plates (4) are further arranged on the left side and the right side of the fixing frame (1), the limiting plates (4) are provided with holes, penetrate through the lead screw (6) and are arranged below the spiral motor (5).
7. The device for detecting the uplift of the grouting stratum of the high-precision dam foundation as claimed in claim 1, is characterized in that: the top of the fixing frame (1) is further provided with a hanging ring (11), and the hanging ring (11) is symmetrical relative to the central axis of the fixing frame (1).
8. The device for detecting the uplift of the grouting stratum of the high-precision dam foundation as claimed in claim 2, wherein: the flexible connection device further comprises a locking mechanism, when the flexible connection device does not work, the sliding rod (20) and the sleeve (19) are fixed through the locking mechanism, when the flexible connection device works, the locking mechanism is unlocked, and the sliding rod (20) and the sleeve (19) are in sliding connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210765590.1A CN115094858A (en) | 2022-07-01 | 2022-07-01 | High-precision dam foundation grouting stratum lift detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210765590.1A CN115094858A (en) | 2022-07-01 | 2022-07-01 | High-precision dam foundation grouting stratum lift detection device |
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| CN115094858A true CN115094858A (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210765590.1A Pending CN115094858A (en) | 2022-07-01 | 2022-07-01 | High-precision dam foundation grouting stratum lift detection device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202611677U (en) * | 2012-05-30 | 2012-12-19 | 郑州正弘桩工机械制造有限公司 | Control system of drilling machine and long spiral drilling machine with control system |
| CN105180787A (en) * | 2015-05-05 | 2015-12-23 | 中国电建集团中南勘测设计研究院有限公司 | High-pressure grouting lifting deformation monitor and installation method thereof |
| CN111058497A (en) * | 2020-01-13 | 2020-04-24 | 中南大学 | High-precision dam foundation grouting stratum lift detection device |
| CN111189381A (en) * | 2020-01-13 | 2020-05-22 | 中南大学 | Stratum lift detection device based on differential principle |
| CN111851606A (en) * | 2020-07-09 | 2020-10-30 | 长江水利委员会长江科学院 | High-precision dam foundation grouting stratum lift detection device |
-
2022
- 2022-07-01 CN CN202210765590.1A patent/CN115094858A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202611677U (en) * | 2012-05-30 | 2012-12-19 | 郑州正弘桩工机械制造有限公司 | Control system of drilling machine and long spiral drilling machine with control system |
| CN105180787A (en) * | 2015-05-05 | 2015-12-23 | 中国电建集团中南勘测设计研究院有限公司 | High-pressure grouting lifting deformation monitor and installation method thereof |
| CN111058497A (en) * | 2020-01-13 | 2020-04-24 | 中南大学 | High-precision dam foundation grouting stratum lift detection device |
| CN111189381A (en) * | 2020-01-13 | 2020-05-22 | 中南大学 | Stratum lift detection device based on differential principle |
| CN111851606A (en) * | 2020-07-09 | 2020-10-30 | 长江水利委员会长江科学院 | High-precision dam foundation grouting stratum lift detection device |
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