CN114136246B - Foundation pit deformation monitoring device and method - Google Patents
Foundation pit deformation monitoring device and method Download PDFInfo
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- CN114136246B CN114136246B CN202111434957.3A CN202111434957A CN114136246B CN 114136246 B CN114136246 B CN 114136246B CN 202111434957 A CN202111434957 A CN 202111434957A CN 114136246 B CN114136246 B CN 114136246B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 238000012544 monitoring process Methods 0.000 claims abstract description 95
- 238000002347 injection Methods 0.000 claims abstract description 85
- 239000007924 injection Substances 0.000 claims abstract description 85
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 238000004062 sedimentation Methods 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims 1
- 239000002689 soil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/24—Measuring arrangements characterised by the use of fluids for measuring the deformation in a solid
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General 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 discloses a foundation pit deformation monitoring device and a foundation pit deformation monitoring method, relates to the technical field of foundation pit engineering, and solves the problems of high cost and large error of the existing foundation pit monitoring device. The technical scheme adopted by the invention is as follows: the foundation pit deformation monitoring device comprises a horizontal water injection pipe which is used for being paved along the periphery of a foundation pit, the horizontal water injection pipe is connected end to end and forms a sealed ring shape, the horizontal water injection pipe is respectively connected with a vertical pipe at each position corresponding to a foundation pit deformation monitoring point, the vertical pipe is communicated with the horizontal water injection pipe, the vertical pipe is provided with liquid level scales, and the vertical pipe is vertically arranged and the upper end of the vertical pipe is communicated with the outside. According to the foundation pit deformation monitoring method, the deformation of the foundation pit is monitored through the foundation pit deformation monitoring device, water is completely injected into the horizontal water injection pipe, the deformation monitoring point of the foundation pit is raised or settled, the vertical pipe at the corresponding position is raised or lowered, the actual liquid level of the vertical pipe is correspondingly changed relative to the liquid level scale of the vertical pipe, and the raised and settled change of the deformation monitoring point of the foundation pit can be accurately obtained through the change.
Description
Technical Field
The invention relates to the technical field of foundation pit engineering, in particular to a device and a method for monitoring foundation pit deformation.
Background
At present, equipment such as total stations, leveling instruments, tower scales, inclinometers and the like are widely used for foundation pit deformation monitoring. The tower ruler needs to be manually erected on each measuring point to observe, and the measuring error is large due to the fact that the manual erecting ruler is inaccurate. In addition, the measurement data of each measuring point is relative to the reference point, and when comparing each measuring point, the reference point needs to be converted, so that the processing process is complicated.
Disclosure of Invention
The invention firstly provides a foundation pit deformation monitoring device, which solves the problems of high cost and large error of the existing foundation pit monitoring device.
The technical scheme adopted by the invention is as follows: the foundation pit deformation monitoring device comprises a horizontal water injection pipe which is used for being paved along the periphery of a foundation pit, the horizontal water injection pipe is connected end to end and forms a sealed ring shape, the horizontal water injection pipe is respectively connected with a vertical pipe at each position corresponding to a foundation pit deformation monitoring point, the vertical pipe is communicated with the horizontal water injection pipe, the vertical pipe is provided with liquid level scales, and the vertical pipe is vertically arranged and the upper end of the vertical pipe is communicated with the outside.
Further is: the foundation pit deformation monitoring device further comprises an inclinometer and/or a liquid level sensor, wherein the inclinometer is used for monitoring the inclination of the vertical pipe, and the liquid level sensor is used for monitoring the liquid level scale of the vertical pipe corresponding to the actual liquid level of the vertical pipe. The inclinometer is preferably arranged in the vertical pipe, and the liquid level sensor is preferably non-contact and arranged on the outer side of the horizontal water injection pipe.
Further is: the horizontal water injection pipes between two adjacent vertical pipes are arranged in a straight way, and the pipe sections of the horizontal water injection pipes connected with the vertical pipes are provided with length scales; the foundation pit deformation monitoring device further comprises displacement sensors for monitoring the stretching length of the horizontal water injection pipe, and the displacement sensors are respectively arranged on two sides of the connecting point of the vertical pipe of the horizontal water injection pipe.
Specific: each vertical pipe is provided with an alarm, and the displacement sensor, the inclinometer and the liquid level sensor are electrically connected with the corresponding alarms.
Specific: the horizontal water injection pipe is a plastic silicone pipe, and the vertical pipe is a transparent glass pipe or plastic pipe.
The beneficial effects of the invention are as follows: and the horizontal water injection pipes of the foundation pit deformation monitoring device are completely injected with water, and each vertical pipe is enabled to maintain a certain liquid level height. The foundation pit deformation monitoring points are raised or settled, the vertical pipes at the corresponding positions are raised or lowered, the actual liquid level of the vertical pipes is correspondingly changed relative to the liquid level scales of the vertical pipes, and the raised and settled change conditions of the foundation pit deformation monitoring points can be accurately obtained through the change. The foundation pit deformation monitoring device is simple in structure, low in cost, convenient to adjust, accurate in data, labor-saving in use, and capable of being recycled and reused.
The foundation pit deformation monitoring device comprises an inclinometer, and the uneven settlement or uplift condition of the foundation pit deformation monitoring points at corresponding positions can be obtained by directly measuring the inclination condition of the vertical pipe. The length scale is arranged on the pipe section of the horizontal water injection pipe connected with the vertical pipe, so that deformation conditions between two adjacent foundation pit deformation monitoring points can be evaluated conveniently through stretching changes of the horizontal water injection pipe.
The invention also provides a foundation pit deformation monitoring method, which solves the problems of high cost and large error of the existing foundation pit monitoring method and adopts the following technical scheme: the foundation pit deformation monitoring method monitors the deformation of the foundation pit through the foundation pit deformation monitoring device and comprises the following steps:
s1, paving a horizontal water injection pipe along the periphery of a foundation pit, wherein the horizontal water injection pipe is respectively connected with a vertical pipe at each position corresponding to a deformation monitoring point of the foundation pit, and the vertical pipes are primarily and vertically installed at the deformation monitoring point of the foundation pit.
S2, injecting water into the horizontal water injection pipe to enable the horizontal water injection pipe to be filled with water, and enabling water to be filled in each vertical pipe.
Further is: and the vertical pipe corresponding to the lowest foundation pit deformation monitoring point is used as a water filling port, the vertical pipe corresponding to the highest foundation pit deformation monitoring point is used as an exhaust port, the tops of the vertical pipes corresponding to other foundation pit deformation monitoring points are temporarily sealed, and water filling is performed.
S3, vertically and fixedly mounting each vertical pipe at a foundation pit deformation monitoring point, and communicating the upper ends of the vertical pipes with the outside. For example, set up the support at foundation ditch deformation monitoring point, vertical pipe is installed in the support vertically, and the upper end of vertical pipe is open and is equipped with the pipe plug of adaptation.
S4, monitoring foundation pit deformation: the liquid level scale change corresponding to the actual liquid level of the vertical pipe is used as the sedimentation change of the corresponding foundation pit deformation monitoring point, the inclination change of the vertical pipe is used as the uneven deformation of the corresponding foundation pit deformation monitoring point, and the horizontal water injection pipe stretching change between two adjacent foundation pit deformation monitoring points is used as the deformation between the corresponding two foundation pit deformation monitoring points.
Further is: in the step S1, reserved sections are arranged at positions, close to the vertical pipes, of the horizontal water injection pipes, and the horizontal water injection pipes between the reserved sections are arranged in a straight mode; in the step S4, the horizontal displacement change of the opposite foundation pit deformation monitoring points at the two ends of the horizontal water injection pipe which are arranged in a straight mode is used as deformation between the two corresponding foundation pit deformation monitoring points.
The foundation pit deformation monitoring method has the beneficial effects that: the foundation pit deformation monitoring method is convenient to implement, low in difficulty, safe and reliable to use, the sedimentation change of the corresponding foundation pit deformation monitoring points is reflected through the actual liquid level of the vertical pipe, observation is convenient, the precision is high, and uneven sedimentation change of the foundation pit deformation monitoring points and horizontal displacement change of the two foundation pit deformation monitoring points can be monitored. The foundation pit deformation monitoring method not only can test the deformation of a single foundation pit, but also can monitor the deformation of adjacent foundation pits, not only can make up for the defects that the flow is complicated, the labor cost is high, the artificial vertical ruler is inaccurate and the data can be compared only by conversion treatment in the traditional deformation monitoring work, but also can avoid the defects of high manufacturing cost and high maintenance cost of the traditional foundation pit monitoring device.
Drawings
FIG. 1 is a schematic structural view of a foundation pit deformation monitoring device of the present invention at a single foundation pit deformation monitoring point.
Reference numerals: the device comprises a horizontal water injection pipe 1, a vertical pipe 2, an inclinometer 3, a liquid level sensor 4, a displacement sensor 5, an alarm 6 and a bracket 7.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the foundation pit deformation monitoring device comprises a horizontal water injection pipe 1 which is used for being paved along the periphery of a foundation pit, wherein the horizontal water injection pipe 1 is connected end to end and forms a sealed annular shape. The horizontal water injection pipe 1 is used for being laid along the periphery of the foundation pit, so that the horizontal water injection pipe can be connected end to end and form a sealed annular shape. The horizontal water injection pipe 1 can be an integral body or a multi-section structure, and the multi-section structure can be connected in series end to form a sealed ring shape. The horizontal water injection pipe 1 is respectively connected with the vertical pipe 2 at each position corresponding to the foundation pit deformation monitoring point, and the vertical pipe 2 is communicated with the horizontal water injection pipe 1. For example, the horizontal water injection pipes 1 are connected with the vertical pipes 2 at equal intervals or unequal intervals, and the intervals are 20-30 m. The horizontal water injection pipe 1 and the vertical pipe 2 can be integrated or detachably connected. For example, the horizontal water injection pipes 1 are provided with threaded joints at equal intervals, and one end of the vertical pipe 2 is provided with threads and is connected to the threaded joints of the horizontal water injection pipes 1. The vertical pipes 2 may be equal or unequal in length, but the pipe diameters are preferably equal and as small as possible.
The horizontal water injection pipe 1 and the vertical pipe 2 need to be irrigated when in use, and in order to be convenient for observe the water quantity in the pipe, the horizontal water injection pipe 1 and the vertical pipe 2 are all preferably transparent materials. For example, the horizontal water injection pipe 1 is a plastic silicone pipe, and the plastic silicone pipe is a pipe with the outside of the plastic pipe coated with silica gel; the vertical tube 2 is a transparent glass or plastic tube. The vertical pipe 2 is provided with a liquid level scale so as to observe the liquid level scale corresponding to the actual liquid level. The vertical pipe 2 is placed vertically when in use, and in order to enable the liquid level in the vertical pipe 2 to change correspondingly and freely along with the height change of the vertical pipe 2, the upper end of the vertical pipe 2 is communicated with the outside so as to balance the air pressure in the vertical pipe 2. The upper end of the vertical tube 2 is preferably open and is provided with a sealing cap or plug which can open or close the vertical tube 2.
The vertical pipe 2 is arranged at a foundation pit deformation monitoring point, the foundation pit deformation monitoring point is raised or settled, the vertical pipe 2 at the corresponding position is raised or lowered, the elevation of the actual liquid level of the vertical pipe 2 is relatively fixed, but the actual liquid level of the vertical pipe 2 is correspondingly changed relative to the liquid level scale of the vertical pipe 2, and the raised and settled change of the foundation pit deformation monitoring point can be accurately obtained through the change. The liquid level scale corresponding to the actual liquid level of the vertical pipe 2 can be directly observed manually, or the foundation pit deformation monitoring device further comprises a liquid level sensor 4, and the liquid level sensor 4 is used for monitoring the liquid level scale of the vertical pipe 2 corresponding to the actual liquid level of the vertical pipe 2. The liquid level sensor 4 is preferably mounted outside the horizontal water injection pipe 1 in a non-contact manner. When the foundation pit deformation monitoring device is used, water is completely injected into the horizontal water injection pipe 1, a certain liquid level height is maintained in each vertical pipe 2, and the liquid level sensor 4 is preferably arranged at the actual liquid level of the horizontal water injection pipe 1.
The foundation pit deformation monitoring points are unevenly settled or raised, and the vertical pipe 2 is inclined. The foundation pit deformation monitoring device may further include an inclinometer 3, where the inclinometer 3 is used for monitoring the inclination of the vertical pipe 2, for example, an existing inclinometer 3 is selected, and the inclinometer 3 is installed inside the vertical pipe 2. The inclinometer 3 measures the inclination of the vertical tube 2 and can also be used to correct the liquid level data of the vertical tube 2. The area between deformation monitoring points may have settlement, bulge or horizontal displacement change, the horizontal water injection pipes 1 between two adjacent vertical pipes 2 are arranged straightly, the area between the deformation monitoring points changes, the horizontal water injection pipes 1 will stretch, in order to observe the stretching change, the pipe sections of the horizontal water injection pipes 1 connected with the vertical pipes 2 are provided with length scales, or the whole pipe sections of the horizontal water injection pipes 1 are provided with length scales. In order to be convenient for observe the tensile change of horizontal water injection pipe 1, foundation ditch deformation monitoring devices still includes the displacement sensor 5 that is used for monitoring horizontal water injection pipe 1 tensile length, and horizontal water injection pipe 1 sets up displacement sensor 5 respectively in the both sides of the tie point of vertical pipe 2.
In order to facilitate the timely detection of anomalies, each vertical tube 2 is equipped with an alarm 6, the alarm 6 being preferably an audible and visual alarm. The displacement sensor 5, the inclinometer 3 and the liquid level sensor 4 are all electrically connected with the corresponding alarm 6, and when any monitoring value of the displacement sensor 5, the inclinometer 3 and the liquid level sensor 4 is larger than a set value, the alarm 6 gives out a warning so as to find out and treat in time.
The second subject of the invention is: the foundation pit deformation monitoring method monitors the deformation of the foundation pit through the foundation pit deformation monitoring device and comprises the following steps:
s1, paving a horizontal water injection pipe 1 along the periphery of a foundation pit, wherein the horizontal water injection pipe 1 is respectively connected with a vertical pipe 2 at each position corresponding to a deformation monitoring point of the foundation pit, and the vertical pipe 2 is primarily and vertically installed at the deformation monitoring point of the foundation pit.
The horizontal water injection pipe 1 is paved along the periphery of the foundation pit, can be buried along the foundation pit crown beam or the slope top soil body, can also be directly dug into a groove on the slope top soil body, and then is directly paved in the groove, and the horizontal water injection pipe 1 is horizontally arranged as much as possible according to the foundation pit field height difference. The foundation pit deformation monitoring point can be excavated into an installation pit for installing the vertical pipe 2, and the vertical pipe 2 can be fixed through the bracket 7, so that the vertical pipe 2 is initially vertically installed. The vertical tube 2 may be pre-closed to prevent entry of soil, e.g. the upper end of the vertical tube 2 is open and fitted with an adapted plug.
S2, injecting water into the horizontal water injection pipe 1, so that the horizontal water injection pipe 1 is filled with water, and each vertical pipe 2 is filled with water.
In order to fill the horizontal water injection pipe 1 with water, according to the altitude of the foundation pit deformation monitoring points, the vertical pipe 2 corresponding to the lowest foundation pit deformation monitoring point is used as a water injection port, the vertical pipe 2 corresponding to the highest foundation pit deformation monitoring point is used as an exhaust port, the tops of the vertical pipes 2 corresponding to other foundation pit deformation monitoring points except the water injection port and the vertical pipe 2 corresponding to the exhaust port are temporarily sealed, and water injection is performed. After the liquid level of the vertical pipe 2 at the exhaust port appears, the water injection is stopped according to the required height.
S3, vertically and fixedly mounting each vertical pipe 2 at a foundation pit deformation monitoring point, and communicating the upper ends of the vertical pipes 2 with the outside. For example, a bracket 7 is erected at a foundation pit deformation monitoring point, the bracket 7 may be a reinforcing bar bracket, and the vertical pipe 2 is vertically installed in the bracket 7.
S4, deformation monitoring: the liquid level scale change corresponding to the actual liquid level of the vertical pipe 2 is used as the sedimentation change corresponding to the foundation pit deformation monitoring points, the inclination change of the vertical pipe 2 is used as the uneven sedimentation change corresponding to the foundation pit deformation monitoring points, and the horizontal water injection pipe 1 stretching change between two adjacent foundation pit deformation monitoring points is used as the deformation between two corresponding foundation pit deformation monitoring points.
The change of the liquid level scale can be read manually or can be obtained automatically by the liquid level sensor 4. The inclination change of the vertical tube 2 can be measured directly by hand or automatically by the inclinometer 3. In order to monitor deformation between two adjacent deformation monitoring points, the deformation comprises horizontal displacement between the two deformation monitoring points and lifting change between the two deformation monitoring points, and in step S1, a reserved section is arranged at a position, close to the vertical pipe 2, of the horizontal water injection pipe 1. For example, 20cm is reserved at deformation monitoring points as a preparation amount of tensile deformation, and the horizontal water injection pipes 1 between reserved sections are arranged straight; meanwhile, in step S4, the horizontal displacement change of the opposite foundation pit deformation monitoring points at two ends of the horizontal water injection pipe 1 which is arranged in a flat manner is used as the deformation between the two corresponding foundation pit deformation monitoring points, and the deformation can be observed manually or can be obtained automatically through the displacement sensor 5.
Claims (8)
1. Foundation ditch deformation monitoring devices, its characterized in that: the foundation pit deformation monitoring device comprises a horizontal water injection pipe (1) which is paved along the periphery of a foundation pit, wherein the horizontal water injection pipe (1) is connected end to end and forms a sealed ring shape, the horizontal water injection pipe (1) is respectively connected with a vertical pipe (2) at each position corresponding to a foundation pit deformation monitoring point, the vertical pipe (2) is communicated with the horizontal water injection pipe (1), the vertical pipe (2) is provided with a liquid level scale, the vertical pipe (2) is vertically arranged, the upper end of the vertical pipe is communicated with the outside, the foundation pit deformation monitoring device comprises an inclinometer (3) and/or a liquid level sensor (4), the inclinometer (3) is used for monitoring the inclination of the vertical pipe (2), and the liquid level sensor (4) is used for monitoring the liquid level scale of the vertical pipe (2) corresponding to the actual liquid level of the vertical pipe (2);
the horizontal water injection pipes (1) between two adjacent vertical pipes (2) are arranged in a straight way, and the pipe sections of the horizontal water injection pipes (1) connected with the vertical pipes (2) are provided with length scales; the foundation pit deformation monitoring device comprises a displacement sensor (5) for monitoring the stretching length of the horizontal water injection pipe (1), wherein the displacement sensor (5) is respectively arranged on two sides of the connecting point of the vertical pipe (2) of the horizontal water injection pipe (1).
2. The foundation pit deformation monitoring device of claim 1, wherein: the inclinometer (3) is arranged inside the vertical pipe (2), and the liquid level sensor (4) is non-contact and is arranged on the outer side of the horizontal water injection pipe (1).
3. The foundation pit deformation monitoring device according to claim 1 or 2, wherein: each vertical pipe (2) is provided with an alarm (6), and the displacement sensor (5), the inclinometer (3) and the liquid level sensor (4) are electrically connected with the corresponding alarm (6).
4. The foundation pit deformation monitoring device according to claim 1 or 2, wherein: the horizontal water injection pipe (1) is a plastic silicone pipe, and the vertical pipe (2) is a transparent glass pipe or plastic pipe.
5. The foundation pit deformation monitoring method is characterized by comprising the following steps of: the foundation pit deformation monitoring device according to any one of the preceding claims 1-4 for monitoring the deformation of a foundation pit, comprising the steps of:
s1, paving a horizontal water injection pipe (1) along the periphery of a foundation pit, wherein the horizontal water injection pipe (1) is respectively connected with a vertical pipe (2) at each position corresponding to a deformation monitoring point of the foundation pit, and the vertical pipes (2) are primarily and vertically arranged at the deformation monitoring point of the foundation pit;
s2, injecting water into the horizontal water injection pipe (1) to enable the horizontal water injection pipe (1) to be filled with water, and all the vertical pipes (2) are filled with water;
s3, vertically and fixedly mounting each vertical pipe (2) at a foundation pit deformation monitoring point, wherein the upper ends of the vertical pipes (2) are communicated with the outside;
s4, monitoring foundation pit deformation: the liquid level scale change corresponding to the actual liquid level of the vertical pipe (2) is used as the sedimentation change corresponding to the foundation pit deformation monitoring points, the inclination change of the vertical pipe (2) is used as the uneven deformation corresponding to the foundation pit deformation monitoring points, and the horizontal water injection pipe (1) stretching change between two adjacent foundation pit deformation monitoring points is used as the deformation between two corresponding foundation pit deformation monitoring points.
6. The foundation pit deformation monitoring method of claim 5, wherein: in the step S2, the vertical pipe (2) corresponding to the lowest foundation pit deformation monitoring point is used as a water filling port, the vertical pipe (2) corresponding to the highest foundation pit deformation monitoring point is used as an exhaust port, the tops of the vertical pipes (2) corresponding to other foundation pit deformation monitoring points are temporarily sealed, and water injection is performed.
7. The foundation pit deformation monitoring method of claim 5, wherein: in step S3, a bracket (7) is erected at a foundation pit deformation monitoring point, a vertical pipe (2) is vertically arranged on the bracket (7), and the upper end of the vertical pipe (2) is open and is provided with an adaptive pipe plug.
8. The foundation pit deformation monitoring method of claim 5, 6 or 7, wherein: in the step S1, a reserved section is arranged at a position close to the vertical pipe (2) of the horizontal water injection pipe (1), and the horizontal water injection pipes (1) between the reserved sections are arranged in a straight mode; in the step S4, the horizontal displacement changes of the two ends of the horizontal water injection pipe (1) which are arranged in a straight mode relative to the foundation pit deformation monitoring points are used as the horizontal displacement changes of the two corresponding foundation pit deformation monitoring points.
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| CN202111434957.3A CN114136246B (en) | 2021-11-29 | 2021-11-29 | Foundation pit deformation monitoring device and method |
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| CN114136246B true CN114136246B (en) | 2023-11-07 |
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