CN117128928A - Building foundation subsides deformation monitoring devices - Google Patents

Building foundation subsides deformation monitoring devices Download PDF

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Publication number
CN117128928A
CN117128928A CN202311401895.5A CN202311401895A CN117128928A CN 117128928 A CN117128928 A CN 117128928A CN 202311401895 A CN202311401895 A CN 202311401895A CN 117128928 A CN117128928 A CN 117128928A
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CN
China
Prior art keywords
sedimentation
ring
pipe
shell
inclinometer
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.)
Pending
Application number
CN202311401895.5A
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Chinese (zh)
Inventor
秦泗海
江露露
孙秀娟
刘玉想
武羽晓
刘龙清
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No 801 Hydrogeological Engineering Geology Brigade of Shandong Bureau of Geology and Mineral Resources
Original Assignee
No 801 Hydrogeological Engineering Geology Brigade of Shandong Bureau of Geology and Mineral Resources
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Filing date
Publication date
Application filed by No 801 Hydrogeological Engineering Geology Brigade of Shandong Bureau of Geology and Mineral Resources filed Critical No 801 Hydrogeological Engineering Geology Brigade of Shandong Bureau of Geology and Mineral Resources
Priority to CN202311401895.5A priority Critical patent/CN117128928A/en
Publication of CN117128928A publication Critical patent/CN117128928A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G01B7/24Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in magnetic properties
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00Measuring angles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00Measuring inclination, e.g. by clinometers, by levels
    • G01C9/12Measuring inclination, e.g. by clinometers, by levels by using a single pendulum plumb lines G01C15/10

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)

Abstract

The invention belongs to the technical field of buildings, and provides a device for monitoring settlement deformation of a building foundation, which comprises the following components: the sensor is used for sending out signals when moving close to the sedimentation ring and fixing the sedimentation ring in the sedimentation pipe; the difference value of the heights of the upper sedimentation ring and the lower sedimentation ring in each measurement is obtained through calculation, the difference value is the actual base height in the measurement, the actual base height is subtracted from the initially measured base height, and the compression deformation of the base in the measurement is obtained.

Description

Building foundation subsides deformation monitoring devices
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a device for monitoring settlement deformation of a building foundation.
Background
With the development of industry and civil construction industry, various complex and large engineering buildings are increasingly built, the original state of the ground is changed, and certain pressure is applied to the foundation of the building, so that deformation of the foundation and surrounding stratum is necessarily caused. In order to ensure the normal service life of the building and the safety of the building, and provide reliable data and corresponding sedimentation parameters for future investigation design construction, the necessity and importance of the inclination deformation and sedimentation observation of the building are more obvious. In the construction process of a high-rise building, the settlement observation reinforcement process is used for monitoring, guiding reasonable construction procedures, preventing uneven settlement in the construction process, feeding back information in time, providing detailed manual data for the investigation design construction department, and avoiding damage to the main structure of the building or cracks affecting the use function of the structure due to settlement, thereby causing huge economic loss.
The prior lateral deformation of the building in the construction and operation period is mainly tested by an optical method, the process is complex, the influence of environmental factors such as sunlight and air is caused, the vertical deformation of the building is usually only tested for total settlement, a mark point is set after the building is constructed to a certain height, the settlement deformation of the early stage part is not tested, and the layered settlement in the construction period and the operation period cannot be tested; there is a lack of a device that is easy to use and at the same time can be used for testing vertical and horizontal deformations of a building during construction and operation.
Disclosure of Invention
In order to solve at least one technical problem in the background art, the invention provides a building foundation settlement deformation monitoring device which can be used for testing vertical and horizontal deformation of a building in a construction period and an operation period, and is convenient for measurement and improves measurement accuracy.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a device for monitoring settlement and deformation of a building foundation, comprising: the sedimentation tube, the sedimentation ring and the fixed sedimentation ring are sleeved on the outer surface of the sedimentation tube, the inner side of the sedimentation ring is provided with a guide bulge, the surface of the guide bulge is a smooth arc surface, the fixed sedimentation ring is arranged at the elevation position of the foundation surface of the sedimentation tube, the vertical absolute elevation of the fixed sedimentation ring and the sedimentation tube is kept unchanged, and the sensor emits a signal when moving in the sedimentation tube to approach the sedimentation ring and fix the sedimentation ring.
Further, subside the ring and include annular shell, extension board and permanent magnet, the annular shell is inside hollow annular body, and the mounting hole of annular equipartition is being opened along the outer wall to the top surface and the bottom surface of annular shell for installation extension board, the permanent magnet is filled in annular shell, and the permanent magnet forms a ring and concentric with annular shell, the extension board is equipped with two rows, and every row winds the centre of a circle equipartition six, evenly articulates in the mounting hole, and each extension board tip has the round hole, and the round hole sets up in the mounting hole top to it is fixed through the round pin axle, makes extension board and draw-in groove swing joint.
Further, the extension plate is a bent vertical curved steel plate, and the thickness of the steel plate is 1-1.2 mm.
Further, the building foundation settlement deformation monitoring device further comprises an inclinometer and an inclinometer pipe, the inclinometer pipe is arranged on the outer surface of a building, the inclinometer pipe can slide up and down freely, the outer side face of the inclinometer pipe is provided with a plurality of measuring points, the measuring points can be formed by magnets, the electromagnetic sensors are used for monitoring the measuring points, the inclination angles of the measuring points and the vertical direction can be obtained, the height difference value of the measuring points and the pipe orifice can be accurately calculated according to a scale, and then the horizontal deformation value of the measuring points can be calculated.
Further, the inclinometer comprises a shell, the outer surface of the shell is provided with a roller, a plumb is arranged in the shell and connected with the shell through a central axis, a spring piece attached with a strain gauge is arranged on the central axis, the upper end of the spring piece is connected with a cable, and a shockproof base is arranged at the bottom of the shell.
Further, the inclinometer and the building synchronously deform horizontally and vertically, and the sedimentation pipe is installed on the ground through a foundation, so that the vertical position is kept unchanged.
The beneficial effects of the invention are as follows:
1. according to the invention, a fixed sedimentation ring is arranged at the elevation position of the foundation ground of the sedimentation pipe, the fixed sedimentation ring and the sedimentation pipe are kept the same, a sensor sends out a signal when moving in the sedimentation pipe to approach the sedimentation ring and fix the sedimentation ring, meanwhile, according to the scale value of a measuring ruler, the distance between the fixed sedimentation ring and the inclined pipe orifice is obtained, the height difference of each soil layer sedimentation ring outside the sedimentation pipe during each measurement is obtained through calculation, the difference value of the elevations of the upper sedimentation ring and the lower sedimentation ring on the top surface and the bottom surface of the foundation during each measurement is obtained through calculation, the difference value is the actual foundation height during the measurement, and the actual foundation height is subtracted from the initially measured foundation height, so that the compression deformation of the foundation during the measurement is obtained.
3. The sedimentation ring comprises an annular shell, an extension plate and a permanent magnet, wherein the annular shell is a hollow annular body, the top surface and the bottom surface of the annular shell are provided with annular uniformly distributed mounting holes along the outer wall, the extension plate is driven to be unfolded through the annular shell, the extension plate is driven to rotate and open to enter soil by the extrusion of the soil, the extension plate can well and synchronously sediment with surrounding soil, the sedimentation displacement of the sedimentation ring and the surrounding soil is ensured to be consistent, the sedimentation value of the soil is conveniently monitored, and the measurement precision is improved.
2. The invention also discloses a building foundation settlement deformation monitoring device which comprises an inclinometer and an inclinometer pipe, wherein the inclinometer pipe is arranged on the outer surface of a building, the inclinometer pipe can slide up and down freely, a plurality of measuring points are arranged on the outer side surface of the inclinometer pipe, the measuring points can be formed by magnets, the electromagnetic sensors are used for monitoring the measuring points, the inclination angles of the measuring points and the vertical direction can be obtained, the height difference value of the measuring points and the pipe orifice can be accurately calculated according to a scale, and then the horizontal deformation value of the measuring points can be calculated.
Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic structural view of a settling tube of a device for monitoring settlement deformation of a building foundation;
FIG. 2 is a schematic structural view of an inclinometer of a device for monitoring settlement deformation of a building foundation;
FIG. 3 is a schematic structural view of a sedimentation ring of a device for monitoring sedimentation deformation of a building foundation;
wherein: 1. a sedimentation tube; 2. a sedimentation ring; 3. fixing a sedimentation ring; 4. a roller; 5. a plumb bob; 6. a spring piece; 7. a cable; 8. a shockproof base; 21. an annular shell; 22. a permanent magnet; 23. a protruding column; 24. a pin shaft; 25. and (5) extending the plate.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. refer to an orientation or a positional relationship based on that shown in the drawings, and are merely relational terms, which are used for convenience in describing structural relationships of various components or elements of the present invention, and do not denote any one of the components or elements of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly attached," "connected," "coupled," and the like are to be construed broadly and refer to either a fixed connection or an integral or removable connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present invention can be determined according to circumstances by a person skilled in the relevant art or the art, and is not to be construed as limiting the present invention.
As shown in fig. 1-3, this embodiment provides a building foundation settlement deformation monitoring device, including a settling tube 1, a settling ring 2 and a fixed settling ring 3, the settling ring 2 is sleeved on the outer surface of the settling tube 1, the inner side surface of the settling ring 2 is provided with a guiding bulge, the guiding bulge surface is a smooth arc surface, a fixed settling ring 3 is arranged at the foundation ground elevation position of the settling tube 1, the vertical absolute elevation is kept unchanged together with the settling tube 1, and a sensor emits a signal when moving in the settling tube 1 to approach the settling ring 2 and fix the settling ring 3.
The sedimentation ring 2 comprises an annular shell 21, an extension plate 25 and a permanent magnet 22, wherein the annular shell 21 is a hollow annular body, mounting holes which are annularly and uniformly distributed are formed in the top surface and the bottom surface of the annular shell 21 along the outer wall and are used for mounting the extension plate 25, a convex column 23 is arranged on the inner surface of the annular shell 21, and the surface of the convex column 23 is in a smooth circular arc shape, so that abrasion with the outer surface of a sedimentation tube can be reduced along with the sedimentation of soil; the permanent magnets 22 are filled in the annular shell 21, the permanent magnets 22 form a circular ring and are concentric with the annular shell 21, the extension plates 25 are arranged in two rows, six extension plates are uniformly distributed around the circle center, the ends of the extension plates 25 are provided with round holes, the round holes are arranged above the mounting holes and fixed through the pin shafts 24, the extension plates 25 are movably hinged with the clamping grooves, clamping grooves are further formed in the top surface and the bottom surface of the annular shell 21, and when the extension plates 25 rotate for a certain angle, the protrusions of the extension plates 25 sink into the clamping grooves, so that the positions of the extension plates 25 are fixed; before installation, extension board 25 hugs closely the lateral wall of annular shell 21, when reaching the mounted position, through rotating annular shell 21 for extension board 25 is along circumference expansion, after expanding certain angle, through joint groove and protruding card with fixed in position. The fixed sedimentation ring 3 has the same structure as the sedimentation ring 2, and the difference is that the inner side surface of the fixed sedimentation ring 3 is fixedly connected with the outer surface of the sedimentation tube 1 by adopting welding.
The extension plate 25 is a curved vertical curved steel plate with a thickness of 1-1.2 mm, and when the annular housing 21 is rotated at a predetermined position, the extension plate 25 is opened by a certain angle as the annular housing 21 rotates counterclockwise.
The filler of the permanent magnet 22 is a manually magnetized magnet sheet.
The measuring ruler is connected with the sensor and is placed in the sedimentation tube 1, the sensor emits a signal when approaching to the fixed sedimentation ring 3 and the sedimentation ring 2, meanwhile, according to the scale value of the measuring ruler, the distance between the fixed sedimentation ring 3 and the sedimentation ring 2 and the inclined tube orifice is obtained, the height difference of each soil layer sedimentation ring 2 on the outer side of the sedimentation tube 1 during each measurement is obtained through calculation, the height difference of each initial measurement is subtracted, the sum of the sedimentation amounts of each coating during the measurement is obtained, and the difference of the heights of the fixed sedimentation ring 3 and the sedimentation ring 2 during each measurement is obtained through calculation, wherein the difference is the basic sedimentation amount during the measurement; and calculating to obtain the difference value of the heights of the upper sedimentation ring 2 and the lower sedimentation ring 2 on the top surface and the bottom surface of the base in each measurement, wherein the difference value is the actual base height in the measurement, and subtracting the actual base height from the initially measured base height to obtain the compression deformation of the base in the measurement.
The device also comprises an inclinometer and an inclinometer pipe, wherein the inclinometer pipe is arranged on the outer surface of a building, the inclinometer can freely slide up and down along the inclinometer pipe, a plurality of measuring points are arranged on the outer side surface of the inclinometer pipe, the measuring points can be formed by adopting magnets, monitoring the measuring points by utilizing electromagnetic sensors, so that the inclination angles of the measuring points and the vertical direction can be obtained, the height difference value of the measuring points and the pipe orifice can be accurately calculated according to the scale, and then the horizontal deformation value of the measuring points can be calculated; the inclinometer comprises a shell, a roller 4 is arranged on the outer surface of the shell, a plumb 5 is arranged in the shell, the plumb 5 is connected with the shell through a central axis, a spring piece 6 on which a strain gauge is stuck is arranged on the central axis, the upper end of the spring piece 6 is connected with a cable 7, and a shockproof base 8 is arranged at the bottom of the shell. The inclinometer and the building synchronously generate horizontal and vertical deformation, and the sedimentation pipe 1 is installed on the ground through a foundation, so that the vertical position is kept unchanged.
The inclinometer is arranged outside or inside a side wall body of a building, can be poured into the wall body before construction, and can be attached to the outer side surface of the building for installation and fixation after construction.
The sensor is placed into the inclinometer, a signal is sent when the sensor approaches to a measuring point, the distance between each sedimentation ring 2 on the outer side of the inclinometer and the orifice of the inclinometer is accurately determined according to the scale of the side ruler, a conclusion is obtained, the difference value between the heights of two measuring points close to each other in each measurement can be obtained through calculation, the difference value is the measured actual column height and is subtracted from the initially measured column height, the compression deformation of the column in the process of measuring at this time can be obtained, the vertical compression deformation values of the columns in each layer are accumulated, and the vertical compression deformation of the whole building can be obtained.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a building foundation subsides deformation monitoring devices which characterized in that includes: the sedimentation device comprises a sedimentation pipe (1), a sedimentation ring (2) and a fixed sedimentation ring (3), wherein the sedimentation ring (2) is sleeved on the outer surface of the sedimentation pipe (1), a guide bulge is arranged on the inner side surface of the sedimentation ring (2), the surface of the guide bulge is a smooth arc surface, the fixed sedimentation ring (3) is arranged at the elevation position of the foundation surface of the sedimentation pipe (1), the vertical absolute elevation of the fixed sedimentation ring and the sedimentation pipe (1) is kept unchanged, and a sensor moves in the sedimentation pipe (1) to be close to the sedimentation ring (2) and sends out a signal when the sedimentation ring (3) is fixed;
the sedimentation ring (2) comprises an annular shell (21), extension plates (25) and permanent magnets (22), wherein the annular shell (21) is an annular body with hollow inside, the top surface and the bottom surface of the annular shell (21) are provided with mounting holes uniformly distributed along the outer wall and used for mounting the extension plates (25), the permanent magnets (22) are filled in the annular shell (21), the permanent magnets (22) form a circular ring and are concentric with the annular shell (21), the extension plates (25) are provided with two rows, six extension plates are uniformly hinged in the mounting holes around the circle center, the end parts of the extension plates (25) are provided with round holes, and the round holes are arranged above the mounting holes and are fixed through pin shafts (24) so that the extension plates (25) are movably hinged with clamping grooves.
2. The device for monitoring settlement deformation of building foundation according to claim 1, wherein the extension plate is a bent vertical curved steel plate, and the thickness of the steel plate is 1-1.2 mm.
3. The device for monitoring settlement and deformation of building foundation according to claim 1, further comprising an inclinometer and an inclinometer pipe, wherein the inclinometer pipe is arranged on the outer surface of a building, the inclinometer pipe can slide up and down freely along the inclinometer pipe, a plurality of measuring points are arranged on the outer side surface of the inclinometer pipe, the measuring points can be formed by magnets, the electromagnetic sensors are used for monitoring the measuring points, the inclination angle between each measuring point and the vertical direction can be obtained, the height difference between each measuring point and a pipe orifice can be accurately calculated according to a scale, and then the deformation value of each measuring point in the horizontal direction can be calculated.
4. A device for monitoring settlement deformation of a building foundation according to claim 3, wherein the inclinometer comprises a shell, a roller (4) is arranged on the outer surface of the shell, a plumb (5) is arranged in the shell, the plumb (5) is connected with the shell through a central axis, a spring piece (6) attached with a strain gauge is arranged on the central axis, the upper end of the spring piece (6) is connected with a cable (7), and a shockproof base (8) is arranged at the bottom of the shell.
5. A device for monitoring the sedimentation deformation of a building foundation according to claim 3, characterized in that the inclinometer and the building are deformed horizontally and vertically simultaneously, and the sedimentation pipe (1) is installed on the ground through the foundation, keeping the vertical position unchanged.
CN202311401895.5A 2023-10-27 2023-10-27 Building foundation subsides deformation monitoring devices Pending CN117128928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311401895.5A CN117128928A (en) 2023-10-27 2023-10-27 Building foundation subsides deformation monitoring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311401895.5A CN117128928A (en) 2023-10-27 2023-10-27 Building foundation subsides deformation monitoring devices

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118031903A (en) * 2024-04-12 2024-05-14 中建五局第三建设(深圳)有限公司 Ground subsidence monitoring device and application method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1312924A (en) * 1969-03-24 1973-04-11 Dorr Oliver Inc Sedimentation apparatus having vertically stacked settling compart ments
GB1408699A (en) * 1973-06-01 1975-10-01 Chernomorskoe Ts Pk Bjuro Apparatus for separating an oi-water mixture collected in a collection vessel of a floating oil collector
CN105606070A (en) * 2016-03-07 2016-05-25 三峡大学 Device and method for testing vertical and horizontal deformation of building
CN109631832A (en) * 2018-12-10 2019-04-16 中交天津港湾工程研究院有限公司 A kind of soil body delaminating deposition quantity monitoring method
CN112195903A (en) * 2020-09-01 2021-01-08 神华神东煤炭集团有限责任公司 Device and method for measuring rock-soil layer settlement and application
CN213067533U (en) * 2020-10-27 2021-04-27 上海旻悦勘察设计有限公司 Settlement instrument
CN115247413A (en) * 2021-04-28 2022-10-28 深圳大学 Soil body layered settlement optical fiber induction measuring ring

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1312924A (en) * 1969-03-24 1973-04-11 Dorr Oliver Inc Sedimentation apparatus having vertically stacked settling compart ments
GB1408699A (en) * 1973-06-01 1975-10-01 Chernomorskoe Ts Pk Bjuro Apparatus for separating an oi-water mixture collected in a collection vessel of a floating oil collector
CN105606070A (en) * 2016-03-07 2016-05-25 三峡大学 Device and method for testing vertical and horizontal deformation of building
CN109631832A (en) * 2018-12-10 2019-04-16 中交天津港湾工程研究院有限公司 A kind of soil body delaminating deposition quantity monitoring method
CN112195903A (en) * 2020-09-01 2021-01-08 神华神东煤炭集团有限责任公司 Device and method for measuring rock-soil layer settlement and application
CN213067533U (en) * 2020-10-27 2021-04-27 上海旻悦勘察设计有限公司 Settlement instrument
CN115247413A (en) * 2021-04-28 2022-10-28 深圳大学 Soil body layered settlement optical fiber induction measuring ring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118031903A (en) * 2024-04-12 2024-05-14 中建五局第三建设(深圳)有限公司 Ground subsidence monitoring device and application method thereof
CN118031903B (en) * 2024-04-12 2024-06-25 中建五局第三建设(深圳)有限公司 Ground subsidence monitoring device and application method thereof

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