CN108507526A - A kind of foundation pit deformation measuring device and its measurement method - Google Patents
A kind of foundation pit deformation measuring device and its measurement method Download PDFInfo
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- CN108507526A CN108507526A CN201810313526.3A CN201810313526A CN108507526A CN 108507526 A CN108507526 A CN 108507526A CN 201810313526 A CN201810313526 A CN 201810313526A CN 108507526 A CN108507526 A CN 108507526A
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/22—Measuring 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 capacitance
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/24—Measuring 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
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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
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- 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
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A kind of foundation pit deformation measuring device and its measurement method, the measuring device includes steel wire, spring, obliquity sensor, displacement sensor, upper mounted plate and bottom plate, fixed plate is fixed on foundation pit side-wall upper edge and perpendicular to foundation pit side-wall, the bottom of foundation ditch close to foundation pit side-wall is fixed in the steel wire bottom end, bottom plate is fixed at the top of steel wire and perpendicular to steel wire, one end of spring and displacement sensor is connect with bottom plate upper surface, the lower surface connection of the other end and upper mounted plate of spring and displacement sensor；The coefficient of elasticity of the spring is 1~2N/mm；The obliquity sensor is fixed on steel wire top, is placed perpendicular to steel wire, can be used for the deflection angle of measuring steel wire；Before measurement starts, spring and steel wire are pre-tightened, and steel wire and spring is made to be in vertical tensional state.The device can replace the measurement methods such as existing total powerstation, save human cost.
Description
Technical field
The present invention relates to a kind of measuring device and measuring method that can monitor foundation pit deformation in real time, belong to foundation pit deformation measurement
Field.
Background technology
With the continuous propulsion of urbanization process, the space availability ratio of modern city is higher and higher, the congestion phenomenon in city
Increasingly severe, the utilization of urban underground space become the inexorable trend of urban development.Underground parking, market place builet below the ground and
The a large amount of underground space such as subterranean tunnel utilizes the excavation phenomenon for essential underground deep basal pit occur.
Reduce the horizontal supporting force of the soil body after excavation of foundation pit, the precipitation of excavation of foundation pit causes level of ground water reduction and hole outer
Water level is uneven, and generation differential water pressures are larger, makes the factors such as weight stress increase in soil that may lead to periphery Important building
There is lateral deformation, inclination, displacement, or even cracking in object and land subsidence, influence important building and personnel, construction safety；This
Outside, it is contemplated that the absolute of base pit engineering cannot be completely secured in existing Foundation Pit Support Design method and geological conditions, supporting scheme
Safety.Therefore, monitoring foundation pit construction is very necessary to the safety of periphery important building and personnel and base pit engineering itself
's.
The method that pit retaining monitoring largely uses at present is total station instrument coordinate method of changing.Total station instrument coordinate method of changing is in base
Several differential reference points are arranged in the arbitrary stable and firm place cheated outside construction infection, on differential reference point and distortion monitoring points
Permanent reflecting prism is installed.The three-dimensional coordinate that each point is observed in a survey station direction is arbitrarily set according to the shape of foundation pit.Using more
The data of secondary observation are after difference and adjustment, the benchmark as later Deformation Monitor Data Processing.By daily one or several weeks
Phase carries out horizontal displacement and the observation of vertical displacement three-dimensional；Since being observed second, each survey station not sum the last time
It overlaps, but differential reference point must be utilized to measure the survey station three-dimensional coordinate that this is measured.Thereafter, meter calculates this each prison
Measuring point coordinate value.Difference compensating computation goes out each monitoring point in the deformation values of horizontal displacement both direction and sedimentation Direction distortion
Value, the i.e. deformation values of three-dimensional.Different margin of foundation pit shapes are pressed again, and by the shift value in 3 dimension directions, value is converted into foundation pit
Edge normal direction horizontal displacement value and vertical sedimentation value.
Requirement of the pit retaining monitoring to data precision and monitoring frequency is all higher, although the operation letter of total station instrument coordinate method of changing
It is single, but due to being manual operation, needing staff, one or several periods are observed daily, and the amount of labour is very big, no
It can realize and measure in real time, and be also easy to produce measurement error.Moreover, total station instrument coordinate method of changing can only measure the horizontal displacement of foundation pit,
It is unable to measure the Vertical Settlement of foundation pit, and the Vertical Settlement of foundation pit is also highly important safety index.In the city of modernization
In construction, these disadvantages bring the security risk of deep foundation pit construction, and not perfect due to these detecting systems has resulted in
Many engineering accidents.Therefore, it studies, design efficient, precise and stable, the real-time foundation pit deformation monitoring technology of one kind as ability
Field technique personnel technical barrier in the urgent need to address.
Invention content
The object of the present invention is to provide a kind of measuring device of foundation pit deformation and its measurement methods.The foundation pit measurement device and
Measurement method can efficient, precise and stable, monitoring foundation pit deformation.
The present invention realizes that its goal of the invention provides firstly a kind of foundation pit deformation measuring device, including steel wire, spring, inclination angle
Sensor, displacement sensor, upper mounted plate and bottom plate, fixed plate are fixed on foundation pit side-wall upper edge and vertical
In foundation pit side-wall, the bottom of foundation ditch close to foundation pit side-wall is fixed in the steel wire bottom end, bottom plate be fixed at the top of steel wire and
Perpendicular to steel wire, one end of spring and displacement sensor is connect with bottom plate upper surface, spring and displacement sensor it is another
End is connect with the lower surface of upper mounted plate；The coefficient of elasticity of the spring is 1~2N/mm；The obliquity sensor is fixed on steel
Silk top, places perpendicular to steel wire, can be used for the deflection angle of measuring steel wire；Before measurement starts, spring and steel wire are carried out pre-
Tightly, and steel wire and spring is made to be in vertical tensional state.
Further, displacement sensor of the present invention includes magnetostrictive displacement sensor, rod-pulling type straight-line displacement sensing
Device and capacitive displacement transducer.
Magneto strictive sensor possesses high-precision, can bear high temperature, high pressure and strong vibration；It is run without abrasion, stability is good.
Rod-pulling type linear displacement transducer, small, easy for installation, output signal diversification, precision is high, fast response time.Condenser type
Linear displacement transducer, simple in structure, high temperature resistant, radiation hardness, high resolution, dynamic response characteristic are good, of low cost.Through reality
It tests, above-mentioned three kinds of displacement sensors are applied to for accurate to the measurement measurement result of vertical displacement in this measuring device, installation
Convenient, suitability is strong.
Invention realizes that its goal of the invention additionally provides the above-mentioned foundation pit deformation measuring device of two kinds of uses and carried out to foundation pit deformation
The method of measurement, one of which method are：In real time measured by angle value θ and displacement sensor measured by monitoring obliquity sensor
Shift value d, and according to the horizontal displacement X and vertical displacement Y of measured angle value θ and shift value d judgement foundation pits, specifically sentence
The method of determining is：
If angle value θ ≠ 0, shift value d >=0 then judges θ/360 ° foundation pit only occurred level displacement X, X=2 π h*,
In, h is initial foundation depth；
If angle value θ=0, shift value d ≠ 0 then judges that vertical displacement Y, Y=d only occur for foundation pit；
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical position have occurred
Move Y, θ/360 ° horizontal displacement X=2 π (h-d) *, vertical displacement Y=d, wherein h is initial foundation depth.
Another method is：Displacement measured by angle value θ and displacement sensor measured by monitoring obliquity sensor in real time
Value d, and according to the horizontal displacement X and vertical displacement Y of measured angle value θ and shift value d judgement foundation pits, specific judgement side
Method is：
If angle value θ ≠ 0, shift value d >=0 then judges foundation pit only occurred level displacement X, X=h*tan θ, wherein h
For initial foundation depth；
If angle value θ=0, shift value d ≠ 0 then judges that vertical displacement Y, Y=d only occur for foundation pit；
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical position have occurred
Move Y, horizontal displacement X=(h-d) * tan θ, vertical displacement Y=d, wherein h is initial foundation depth.
The principle of the present invention is：
If angle value θ ≠ 0, shift value d >=0 then judges foundation pit only occurred level displacement X, because when foundation pit only occurs
When horizontal displacement, foundation pit side-wall top edge can be driven spring and steel wire that entirety occurs by upper mounted plate and be deflected, and steel wire bottom end
Fixed, so the deflection relative to vertical direction can occur for steel wire, the angle that obliquity sensor is shown is rotation angle θ.Steel
Silk deflection may will produce very small stretching, can be neglected (d >=0).Due to horizontal displacement and foundation depth h
It is small compared to very, so horizontal displacement X can be acquired by θ/360 ° arc length formula X=2 π h* approximation, sine can also be passed through
Formula approximation acquires horizontal displacement X, X=h*tan θ.
When vertical displacement (Excavation Settlement) occurs for foundation pit, steel wire and the whole deformation in vertical direction of spring are concentrated in bullet
The vertical displacement of foundation pit can be obtained so by the stroke of displacement sensor spring in spring part.If angle value θ=
0, shift value d ≠ 0 then judges that vertical displacement only occurs for foundation pit, by the stroke of displacement sensor spring, base can be obtained
The vertical displacement Y, Y=d in hole；D is the measured value of displacement sensor.
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical position have occurred
Move Y.The horizontal displacement X of foundation pit is acquired by arc length formula, and θ/360 ° X=2 π (h-d) * can also be asked by sine formula approximation
, X=h*tan θ vertical displacements Y=d, wherein h is initial foundation depth.
It is computed, uses precision for 0.01 ° of obliquity sensor, when foundation depth is 15 meters, above two measurement side
Measurement accuracy of the method in horizontal displacement is 2.5mm or so.The early warning value detected needed for 15 meters of foundation pits in engineering is 3mm, therefore,
This measuring device complies fully with foundation pit measurement request.The measurement accuracy of vertical displacement depends on displacement sensor, can be as needed
It selects.
Compared with prior art, the advantageous effect of above-mentioned foundation pit deformation measuring device is：
One, the device can replace the measurement methods such as existing total powerstation, greatly reduce the working strength of staff, save
Human cost, accuracy of detection is high, at low cost；Data can intuitively be showed testing staff by obliquity sensor measurement, it is right
Testing staff requires without profession；And can develop to form remote auto monitoring, without staff to field monitoring.
Two, by being used cooperatively obliquity sensor and displacement sensor, horizontal displacement and vertical displacement amount can be measured in real time,
And it can judge displacement type and displacement data, the deflection of comprehensive judgement foundation pit in all directions according to measurement data.
Four, selecting coefficient of elasticity to be the spring of 1~2N/mm can both ensure that spring and steel wire can be fully pre- when original state
Tightly, steel wire and spring entirety run-off the straight when foundation pit side-wall upper edge generates horizontal displacement, to be measured using obliquity sensor
Angle calculates the horizontal displacement of foundation pit side-wall upper edge；When can ensure that vertical displacement (Excavation Settlement) occurs for foundation pit again, steel
Silk and the whole deformation in vertical direction of spring are concentrated in spring section, can pass through the flexible of displacement sensor spring
Amount, obtains the vertical displacement of foundation pit.
Description of the drawings
Fig. 1 is general arrangement schematic of the embodiment of the present invention.
Fig. 2 is the enlarged diagram of part A in Fig. 1.
Fig. 3 is the principle schematic that the embodiment of the present invention measures Foundation Pit X by arc length formula.
Fig. 4 is the principle schematic that the embodiment of the present invention measures Foundation Pit X by sine formula.
Fig. 5 is the principle schematic that the embodiment of the present invention measures foundation pit vertical displacement Y.
Fig. 6 is the principle signal that the embodiment of the present invention measures Foundation Pit X and vertical displacement Y by arc length formula
Figure.
Fig. 7 is the principle signal that the embodiment of the present invention measures Foundation Pit X and vertical displacement Y by sine formula
Figure.
In figure, M indicates foundation pit side-wall.
Specific implementation mode
Embodiment
Fig. 1 and Fig. 2 shows a kind of, foundation pit deformation measuring device, including steel wire (1), spring (2), obliquity sensor (3),
Displacement sensor (4), upper mounted plate (5) and bottom plate (6), fixed plate (5) are fixed on foundation pit side-wall upper edge
And perpendicular to foundation pit side-wall；The bottom of foundation ditch close to foundation pit side-wall is fixed in steel wire (1) bottom end, and bottom plate (6) is fixed on steel
At the top of silk (1) and perpendicular to steel wire (1), one end of spring (2) and displacement sensor (4) is connect with bottom plate (6) upper surface,
The other end of spring (2) and displacement sensor (4) is connect with the lower surface of upper mounted plate (5)；The elasticity system of the spring (2)
Number is 1~2N/mm；The obliquity sensor (3) is fixed on steel wire (1) top, is placed perpendicular to steel wire (1), can be used for measuring
The deflection angle of steel wire (1)；Before measurement starts, spring (2) and steel wire (1) are pre-tightened, and make steel wire (1) and spring (2)
In vertical tensional state.
Displacement sensor described in this example (4) include magnetostrictive displacement sensor, rod-pulling type linear displacement transducer and
Capacitive displacement transducer.
The size of spring 2 described in this example is：Outer diameter 8mm, length 30mm, the thick 1mm of spring wire.
A kind of measurement method of foundation pit deformation measuring device described above is：In real time measured by monitoring obliquity sensor 3
Shift value d measured by angle value θ and displacement sensor 4, and foundation pit is judged according to measured angle value θ and shift value d
Horizontal displacement X and vertical displacement Y, specific determination method are：
If angle value θ ≠ 0, shift value d >=0 then judges θ/360 ° foundation pit only occurred level displacement X, X=2 π h*,
In, h is initial foundation depth；
If angle value θ=0, shift value d ≠ 0 then judges that vertical displacement Y, Y=d only occur for foundation pit；
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical position have occurred
Move Y, θ/360 ° horizontal displacement X=2 π (h-d) *, vertical displacement Y=d, wherein h is initial foundation depth.
Another measurement method of foundation pit deformation measuring device described above is：Monitoring obliquity sensor 3 is surveyed in real time
The shift value d measured by angle value θ and displacement sensor 4 is obtained, and foundation pit is judged according to measured angle value θ and shift value d
Horizontal displacement X and vertical displacement Y, specific determination method be：
If angle value θ ≠ 0, shift value d >=0 then judges foundation pit only occurred level displacement X, X=h*tan θ, wherein h
For initial foundation depth；
If angle value θ=0, shift value d ≠ 0 then judges that vertical displacement Y, Y=d only occur for foundation pit；
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical position have occurred
Move Y, horizontal displacement X=(h-d) * tan θ, vertical displacement Y=d, wherein h is initial foundation depth.
Fig. 3 to Fig. 7 is the principle schematic that above two measurement method measures the horizontal displacement X of foundation pit, vertical displacement Y.
1 top of original state steel wire is fixed on by spring 2 at the p points of foundation pit side-wall top edge upper mounted plate 5, and 1 bottom of steel wire is fixed
In o points；Op=h at this time, h are the initial depth of foundation pit.
If angle value θ ≠ 0, shift value d >=0 then judges foundation pit only occurred level displacement X, because when foundation pit only occurs
When horizontal displacement, foundation pit side-wall top edge can drive spring 2 and steel wire 1 to occur relative to vertical side by the way that upper mounted plate 5 is whole
To deflection, 2 top of spring is moved to q points, and the angle that obliquity sensor 3 is shown is deflection angle θ.1 deflection of steel wire
Very small stretching may be will produce, can be neglected (d >=0).As shown in figure 3, due to horizontal displacement and foundation depth h
It is small compared to very, so horizontal displacement can be acquired by θ/360 ° arc length formula X=2 π h* approximation.As shown in figure 4, can also
Horizontal displacement X is acquired by sine formula：X=h*tan θ.
When vertical displacement (Excavation Settlement) occurs for foundation pit, steel wire 1 and the whole deformation in vertical direction of spring 2 are concentrated in
The vertical displacement of foundation pit can be obtained so measuring the stroke of spring 2 by displacement sensor 4 in 2 part of spring.Such as Fig. 5 institutes
Show, if angle value θ=0, shift value d ≠ 0 then judges that vertical displacement only occurs for foundation pit, and spring is measured by displacement sensor 4
The vertical displacement Y, Y=d of foundation pit can be obtained in 2 stroke；D is the measured value of displacement sensor 4.
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical position have occurred
Move Y.As shown in Fig. 6, the horizontal displacement X of foundation pit is acquired by arc length formula, θ/360 ° X=2 π (h-d) *, vertical displacement Y=
D, wherein h is initial foundation depth.As shown in fig. 7, horizontal displacement X can also be acquired by sine formula：X=(h-d) *
Tan θ, vertical displacement Y=d, wherein h is initial foundation depth.
Claims (4)
1. a kind of foundation pit deformation measuring device, including steel wire (1), spring (2), obliquity sensor (3), displacement sensor (4), on
Fixed plate (5) and bottom plate (6), fixed plate (5) are fixed on foundation pit side-wall upper edge and perpendicular to foundation pit side-wall；
The bottom of foundation ditch close to foundation pit side-wall is fixed in steel wire (1) bottom end, bottom plate (6) be fixed at the top of steel wire (1) and perpendicular to
One end of steel wire (1), spring (2) and displacement sensor (4) is connect with bottom plate (6) upper surface, spring (2) and displacement sensing
The other end of device (4) is connect with the lower surface of upper mounted plate (5)；The coefficient of elasticity of the spring (3) is 1~2N/mm；It is described to incline
Angle transducer (3) is fixed on reinforcing bar (1) top, is placed perpendicular to steel wire (1), can be used for the deflection angle of measuring steel wire (1)；It surveys
Before amount starts, spring (2) and steel wire (1) are pre-tightened, and steel wire (1) and spring (2) is made to be in vertical tensional state.
2. a kind of foundation pit deformation measuring device according to claim 1, it is characterised in that：Institute's displacement sensors (4) wrap
Include magnetostrictive displacement sensor, rod-pulling type linear displacement transducer and capacitive displacement transducer.
3. a kind of measurement method of any foundation pit deformation measuring systems of claim 1-2, it is characterised in that：Monitoring in real time
Shift value d measured by angle value θ and displacement sensor (4) measured by obliquity sensor (3), and according to measured angle value
θ and shift value d judges that the horizontal displacement X of foundation pit and vertical displacement Y, specific determination method are：
If angle value θ ≠ 0, shift value d >=0 then judges θ/360 ° foundation pit only occurred level displacement X, X=2 π h*, wherein h
For initial foundation depth；
If angle value θ=0, shift value d ≠ 0 then judges that vertical displacement Y, Y=d only occur for foundation pit；
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical displacement Y have occurred,
θ/360 ° horizontal displacement X=2 π (h-d) *, vertical displacement Y=d, wherein h is initial foundation depth.
4. a kind of measurement method of any foundation pit deformation measuring systems of claim 1-2, it is characterised in that：Monitoring in real time
Shift value d measured by angle value θ and displacement sensor (4) measured by obliquity sensor (3), and according to measured angle value
θ and shift value d judges that the horizontal displacement X of foundation pit and vertical displacement Y, specific determination method are：
If angle value θ ≠ 0, shift value d >=0 then judges foundation pit only occurred level displacement X, X=h*tan θ, wherein h is first
Beginning foundation depth；
If angle value θ=0, shift value d ≠ 0 then judges that vertical displacement Y, Y=d only occur for foundation pit；
If angle value θ ≠ 0, shift value d ＜ 0 then judge that horizontal displacement X had not only had occurred in foundation pit, but also vertical displacement Y have occurred,
Horizontal displacement X=(h-d) * tan θ, vertical displacement Y=d, wherein h is initial foundation depth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810313526.3A CN108507526B (en) | 2018-04-10 | 2018-04-10 | Foundation pit deformation measuring device and measuring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810313526.3A CN108507526B (en) | 2018-04-10 | 2018-04-10 | Foundation pit deformation measuring device and measuring method thereof |
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| WO2019196771A1 (en) * | 2018-04-10 | 2019-10-17 | 成都柏森松传感技术有限公司 | System and method for measuring deformation of foundation pit |
| CN111438344A (en) * | 2019-01-16 | 2020-07-24 | 宝山钢铁股份有限公司 | Measuring device and measuring method for hot roll gap of hydraulic fan-shaped section of continuous casting machine |
| CN111879288A (en) * | 2020-07-21 | 2020-11-03 | 浙江虎跃建设有限公司 | Engineering supervision safety monitoring system |
| CN112160308A (en) * | 2020-10-30 | 2021-01-01 | 北京住总第六开发建设有限公司 | Excavation measuring device for earthwork foundation pit in building construction |
| CN112813824A (en) * | 2020-12-31 | 2021-05-18 | 江苏中路工程技术研究院有限公司 | Device and method for monitoring relative vertical deformation rate between ribs of steel bridge deck system |
| CN113309110A (en) * | 2021-06-07 | 2021-08-27 | 重庆海发工程项目管理咨询有限公司 | Automatic monitoring system and method for foundation pit displacement |
| CN114908818A (en) * | 2022-05-31 | 2022-08-16 | 河南五建建设集团有限公司 | Foundation pit deformation observation device |
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| WO2019196771A1 (en) * | 2018-04-10 | 2019-10-17 | 成都柏森松传感技术有限公司 | System and method for measuring deformation of foundation pit |
| CN111438344A (en) * | 2019-01-16 | 2020-07-24 | 宝山钢铁股份有限公司 | Measuring device and measuring method for hot roll gap of hydraulic fan-shaped section of continuous casting machine |
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| CN111879288B (en) * | 2020-07-21 | 2022-04-22 | 浙江虎跃建设有限公司 | Engineering supervision safety monitoring system |
| CN112160308A (en) * | 2020-10-30 | 2021-01-01 | 北京住总第六开发建设有限公司 | Excavation measuring device for earthwork foundation pit in building construction |
| CN112813824A (en) * | 2020-12-31 | 2021-05-18 | 江苏中路工程技术研究院有限公司 | Device and method for monitoring relative vertical deformation rate between ribs of steel bridge deck system |
| CN113309110A (en) * | 2021-06-07 | 2021-08-27 | 重庆海发工程项目管理咨询有限公司 | Automatic monitoring system and method for foundation pit displacement |
| CN114908818A (en) * | 2022-05-31 | 2022-08-16 | 河南五建建设集团有限公司 | Foundation pit deformation observation device |
| CN114908818B (en) * | 2022-05-31 | 2023-02-14 | 河南五建建设集团有限公司 | Foundation pit deformation observation device |
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| CN108507526B (en) | 2020-07-17 |
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