CN102288157A - Method for monitoring deep settlement of foundation - Google Patents

Method for monitoring deep settlement of foundation Download PDF

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Publication number
CN102288157A
CN102288157A CN 201110219540 CN201110219540A CN102288157A CN 102288157 A CN102288157 A CN 102288157A CN 201110219540 CN201110219540 CN 201110219540 CN 201110219540 A CN201110219540 A CN 201110219540A CN 102288157 A CN102288157 A CN 102288157A
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pressure
ground
pressure transducer
flush type
settlement
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CN102288157B (en
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姚鸿梁
钟小滨
方红发
宋爽
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Shanghai Tonghe Engineering Technology Co., Ltd.
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TOEHOLD CIVIL ENGINEERING TECHNOLOGY Co Ltd SHANGHAI
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Abstract

The invention relates to a method for monitoring the deep settlement of a foundation, which is characterized in that: a liquid level static pressure monitoring method is adopted; in the liquid level static pressure monitoring method, a container provided with a pressure sensor and a secondary instrument is adopted, taken as a pressure measuring reference container and fixed on the ground which is not influenced by the foundation settlement; the height of a pressure sensing surface of the pressure sensor is greater than that of any one embedded settlement instrument; the embedded settlement instrument consists of a shell, a three-way joint, a pressure sensor, a secondary instrument circuit and a serial bus circuit and is electrically connected with other embedded settlement instruments and a ground measurement and control system through an electric serial bus; and the measurement and control system records a pressure value of each detection point, converts the pressure value into a foundation settlement value, and performs curve fitting to obtain a foundation section settlement outline.

Description

A kind of ground deep settlement monitoring method
Technical field
The present invention relates to a kind of monitoring method of settlement of foundation, particularly disclose a kind of ground deep settlement monitoring method, belong to field of civil engineering.
Background technology
Construct on the ground, all can cause settlement of foundation as buildings, highway, dam etc.Settlement of foundation method of testing in the past roughly is divided into two classes, and a class is that the pre-buried tube type of vertical drilling is measured, and have advantage simple in structure, with low cost, but its precision is lower, and in work progress fragile causing of settlement monitoring pipe can't measure.Another kind of is the transverse section buried tube type, measures the method at inclination angle and measures indirectly, has the precision advantage of higher, but its equally easily in work progress the pipe laying deformed damaged cause and can't measure.
Summary of the invention
Purpose of the present invention addresses the deficiencies of the prior art, the method that adopts pressure differential detection principle and liquid level static pressure to detect, and design does not a kind ofly influence the flush type detection method of construction reliably, and the assurance measuring accuracy.
The present invention is achieved in that a kind of ground deep settlement monitoring method, it is characterized in that: adopt liquid level static pressure monitoring method, described liquid level static pressure monitoring method adopts the container that pressure transducer and secondary instrument are installed, be fixed on and be not subjected on the ground that settlement of foundation influences as the measuring pressure basis container, and the height of the pressure-sensitive face of pressure transducer wherein is higher than the height of any one flush type sedimentometer, link to each other with at least one flush type sedimentometer on imbedding tested ground by pipeline, the water delivering orifice of last flush type sedimentometer connects the valvular pipeline of a band, extends to beyond the construction operation face; Described flush type sedimentometer is made of housing, threeway, pressure transducer, secondary instrument circuit and universal serial bus circuit, pressure transducer is connected an interface of threeway, two other interface of threeway can link to each other by the liquid of fluid pipeline with ground benchmark container and other flush type sedimentometer, and the flush type sedimentometer can be electrically connected by electric universal serial bus and other flush type sedimentometer and ground observing and controlling system; Described flush type sedimentometer is cascaded by liquid line and electric universal serial bus, and before foundation construction, shallow embedding is gone into underground, and links to each other with TT﹠C system with ground benchmark container with electric universal serial bus by liquid line; Pour into liquid in the described benchmark container, be full of the whole piece liquid line up to liquid, have have liquid to flow out on the pipeline of valve till, with the valve locking, continue afterwards in container, to pour into liquid, up to liquid level reach vessel volume 50% ~ 80% till.
Described TT﹠C system is read the force value of each pressure transducer P i ,, calculate the height value of each pressure transducer pressure-sensitive face with respect to liquid level by pressure elevation reduction formula h i
The pressure elevation converts and can finish by following formula:
Figure 2011102195405100002DEST_PATH_IMAGE002
?，
Wherein: PBe force value, ρBe density of liquid, gBe acceleration of gravity, hBe the height of benchmark vessel level to pressure transducer pressure-sensitive face.
The height value that described TT﹠C system converses the pressure transducer on the benchmark container h 0 The height value that converses with pressure transducer in each sedimentometer h i Subtract each other, obtain Δ h i , as the altitude datum value record of each sedimentometer before the settlement of foundation in TT﹠C system.Promptly have:
Figure 2011102195405100002DEST_PATH_IMAGE004
?，
Wherein: iNumbering for sedimentometer.
Described each flush type sedimentometer since wherein the pressure transducer and the liquid level of benchmark container change, produce one with foundation construction before the different force value that is recorded P Ij , TT﹠C system writes down these values and converts and can obtain each sedimentometer this moment and to be installed in the liquid level value that is not subjected to the benchmark container that settlement of foundation influences h Ij Record the force value of the pressure transducer on the benchmark container simultaneously P 0j , and converse the height value of itself and benchmark vessel level h 0j
Described TT﹠C system will h 0j With each h Ij Subtract each other, obtain Δ h Ij , as behind the settlement of foundation jDuring inferior detection, the height value of sedimentometer.Promptly have:
Figure 2011102195405100002DEST_PATH_IMAGE006
?，
Wherein: iNumber for sedimentometer.
Each that will calculate respectively after the described TT﹠C system Δ h Ij With record before the settlement of foundation each Δ h i Subtract each other, can obtain jDuring inferior detection, the sedimentation value of sedimentometer.Promptly have:
Figure 2011102195405100002DEST_PATH_IMAGE008
?，
Wherein: S Ij Be iIndividual sedimentometer jDuring inferior detection, the sedimentation value of ground before with respect to construction.
The invention has the beneficial effects as follows: ground deep settlement monitoring method of the present invention adopts the force value of a pressure transducer that is not subjected to settlement influence as benchmark, is subjected to settlement influence with pressure transducer in other flush type sedimentometer and the force value that changes is compared and obtained sedimentation value.Owing to adopt same fluid pipeline, so the influence that not changed by external atmosphere pressure and owing to adopt the conversion pressure measuring method, has also reduced manyly so be acted upon by temperature changes, these advantages are that other monitoring method of employing is unexistent.
The great advantage of ground deep settlement monitoring method of the present invention is not influence construction, can improve operating efficiency greatly, and can not caused measurement point to be scrapped by the construction operation damage.By the remote-transmission module of in TT﹠C system, installing, the sedimentation value of construction area All Jobs monitoring point under all right Centralized Monitoring.
Description of drawings
Fig. 1 is the liquid level static pressure monitoring method schematic diagram of the inventive method.
Fig. 2 is the scheme of installation of liquid level static pressure monitoring system of the present invention before foundation construction.
Fig. 3 is the A portion enlarged drawing of Fig. 2.
Fig. 4 is that the sedimentation view takes place behind foundation construction liquid level static pressure monitoring system.
Among the figure: 1, secondary instrument circuit board; 2, pressure transducer; 3, reference field; 4, liquid; 5, benchmark container; 6, liquid line; 7, universal serial bus; 8, TT﹠C system; 9, flush type sedimentometer; 10, valve; 11, water inlet; 12, gas outlet; 13, water delivering orifice; 14, ground; 15, earth and rock works; 16, sedimentation datum plate; 17, Inlet and outlet water interface; 18, threeway; 19, housing; 20, hermetically-sealed cable interface.
Embodiment
With reference to the accompanying drawings 1,2,3 and 4, a kind of ground deep settlement of the present invention monitoring method, it adopts liquid level static pressure monitoring method.Liquid level static pressure monitoring method is to adopt the container that pressure transducer 2 and secondary instrument are installed, being fixed on the ground (being reference field 3) that not influenced by settlement of foundation goes up as measuring pressure basis container 5, and the height of the pressure-sensitive face of pressure transducer wherein is higher than the height of any one flush type sedimentometer 9, link to each other with at least one flush type sedimentometer 9 on imbedding tested ground by pipeline, the water delivering orifice 13 of last flush type sedimentometer 9 connects a pipeline that has valve 10, extends to beyond the construction operation face.
Flush type sedimentometer 9 is made of housing 19, threeway 18, pressure transducer 2, secondary instrument circuit board 1 and universal serial bus circuit, pressure transducer 2 is connected an interface of threeway 18, two other interface of threeway 18 can link to each other by the liquid 4 of fluid pipeline with ground benchmark container 5 and other flush type sedimentometer 9, and flush type sedimentometer 9 can be electrically connected by universal serial bus 7 and other flush type sedimentometer and ground observing and controlling system 8.Flush type sedimentometer 9 is cascaded by liquid line 6 and universal serial bus 7, and before foundation construction, shallow embedding is gone into underground, and links to each other with TT﹠C system 8 with ground benchmark container 5 with universal serial bus 7 by liquid line 6.
Pour into liquid 4 in the benchmark container 5, be full of whole piece liquid line 6 up to liquid 4, till having liquid to flow out on the pipeline that has valve 10, with valve 10 lockings, continue afterwards in benchmark container 5, to pour into liquid 4, up to liquid level reach vessel volume 50% ~ 80% till.
With reference to the accompanying drawings 2,3 and 4, the inventive method liquid level static pressure monitoring method has adopted three flush type sedimentometers to install before foundation construction.
Water inlet 11, gas outlet 12, water delivering orifice 13 are arranged on benchmark container 5, and its bottom is equipped with pressure transducer 2 and supporting with it secondary instrument circuit board 1, and secondary instrument circuit board 1 links to each other with each flush type sedimentometer with TT﹠C system 8 by universal serial bus 7.Pressure transducer 2 wherein can perception liquid 4 pressure, and be converted to electric weight and pass to secondary instrument circuit board 1, by the digitized processing of secondary instrument circuit board 1, change digital signal into and pass to TT﹠C system 8.
The flush type sedimentometer is made of enclosure-type housing 19, sedimentation datum plate 16, threeway 18, Inlet and outlet water interface 17, pressure transducer 2, secondary instrument circuit board 1, universal serial bus 7 and hermetically-sealed cable interface 20.The pressure of the liquid 4 that the pressure-sensitive face of pressure transducer 2 can be injected by benchmark container 5 by threeway 18 perception, and be converted to electric weight, the digitized processing through secondary instrument circuit board 1 becomes serial signal, passes to TT﹠C system 8 by universal serial bus 7.
The present invention adopts liquid level static pressure monitoring method embodiment as follows:
On the reference field 3 of the settlement influence of not constructed, settle benchmark container 5, its setting height(from bottom) is higher than arbitrary flush type sedimentometer.Before ground 14 constructions, with fluid pipeline 6 that container 5 and all settlement monitoring instrument 9 are interconnected, with universal serial bus TT﹠C system 8 is linked to each other with all settlement monitoring instrument 9.Afterwards, shallow embedding settlement monitoring instrument 9 on ground, and to inject liquid 4(by water inlet 11 to container 5 can be water, anti freezing solution etc.), overflows, extrude all gas in the pipeline 6 with this up to valve 10.At this moment, valve-off continue to inject liquid, up to exceed benchmark container 5 capacity 50%～80% till.
Owing to pressure differential is arranged and is converted to electric weight between the liquid level of pressure transducer 2 perception in each settlement monitoring instrument 9 and the liquid level of 2 perception of the pressure transducer in the container, receive and note these values by TT﹠C system 8 by secondary instrument circuit 1, universal serial bus 7, as the preceding reference value of construction on the ground 14 (for example the earth and rock works 15 of Dui Jiing etc.).
According to the pressure altitude reduction formula:
Figure 2011102195405100002DEST_PATH_IMAGE010
，
Can learn that the value according to liquid level that each pressure transducer is responded to is before ground 14 constructions:
Figure 2011102195405100002DEST_PATH_IMAGE012
。
Wherein: h 0 For the pressure-sensitive face of the pressure transducer on the benchmark container 52 poor with the liquid level of liquid 4; P 0 Be its sensed pressure value, h i The pressure-sensitive face that is i pressure transducer (i=1,2,3) is poor with the liquid level of liquid 4; P i Be i pressure transducer sensed pressure value.
At this moment, pressure transducer on the benchmark container 5 and the alternate position spike between the pressure transducer in each sedimentometer are:
Figure 2011102195405100002DEST_PATH_IMAGE014
?，
TT﹠C system 8 is preserved these differences, as the sedimentation reference value before the foundation construction.
Begin earth and rock works 15 construction operations afterwards, in the process of construction and subsequent in the several years, settlement monitoring instrument 9 will the sedimentation along with the sedimentation of ground.The alternate position spike of itself and ground benchmark container 5 will change thereupon, corresponding, difference in height between the liquid level of the liquid 4 in the pressure-sensitive face of the pressure transducer 2 in the sedimentometer and the ground benchmark container 5 will be along with change, and the pressure transducer below the benchmark container 5 and the difference in height of liquid level then remain unchanged.With these variable quantities of perception and be converted to electric weight, TT﹠C system 8 is in record these differences again, with value before the sedimentation relatively, converting by pressure-degree of depth to draw the settlement of foundation value.
With the formulae express settlement of foundation begin the back sedimentometer in pressure-height change value as follows:
Figure 2011102195405100002DEST_PATH_IMAGE016
?，
Wherein: h 0j Be jDuring inferior monitoring, the pressure-sensitive face of the pressure transducer 2 on the benchmark container 5 is poor with the liquid level of liquid 4; P 0j Be its sensed pressure value, h Ij The pressure-sensitive face that is i pressure transducer (i=1,2,3) is poor with the liquid level of liquid 4.
Each that will calculate respectively after the described TT﹠C system Δ h Ij Each that records before (i=1,2,3) and the settlement of foundation Δ h i Subtract each other, can obtain jDuring inferior detection, the sedimentation value of sedimentometer.Promptly have:
?，
Wherein: S Ij Be iIndividual sedimentometer jDuring inferior detection, the sedimentation value of ground before with respect to construction.
Gas outlet 12 makes the inside and outside atmospheric pressure of container be consistent, in order to avoid when temperature variation, influence liquid pressure measurement owing to expansion of liquids causes the container internal gas pressure to change.

Claims (1)

1. ground deep settlement monitoring method, it is characterized in that: adopt liquid level static pressure monitoring method, described liquid level static pressure monitoring method adopts the container that pressure transducer and secondary instrument are installed, be fixed on and be not subjected on the ground that settlement of foundation influences as the measuring pressure basis container, and the height of the pressure-sensitive face of pressure transducer wherein is higher than the height of any one flush type sedimentometer, link to each other with at least one flush type sedimentometer on imbedding tested ground by pipeline, the water delivering orifice of last flush type sedimentometer connects the valvular pipeline of a band, extends to beyond the construction operation face; Described flush type sedimentometer is made of housing, threeway, pressure transducer, secondary instrument circuit and universal serial bus circuit, pressure transducer is connected an interface of threeway, two other interface of threeway links to each other by the liquid of fluid pipeline with ground benchmark container and other flush type sedimentometer, and the flush type sedimentometer is electrically connected by electric universal serial bus and other flush type sedimentometer and ground observing and controlling system; Described flush type sedimentometer is cascaded by liquid line and electric universal serial bus, and before foundation construction, shallow embedding is gone into underground, and links to each other with TT﹠C system with ground benchmark container with electric universal serial bus by liquid line; Pour into liquid in the described benchmark container, be full of the whole piece liquid line up to liquid, have have liquid to flow out on the pipeline of valve till, with the valve locking, continue afterwards in container, to pour into liquid, up to liquid level reach vessel volume 50% ~ 80% till; Described TT﹠C system is read the force value of each pressure transducer at this moment, and with the pressure transducer and the line item of terrestrial reference container; Described each flush type sedimentometer is in the foundation construction process and subsequent in during the several years, can produce sedimentation along with the sedimentation of ground, this moment wherein pressure transducer can produce one with foundation construction before the different force value that is recorded, TT﹠C system write down these values and with construction before the force value that is recorded relatively, can draw the settlement of foundation value of each check point through converting, through the curve match, obtain ground section sedimentation profile again, computing formula is , S Ij Be iIndividual flush type sedimentometer jDuring inferior detection, the sedimentation value of ground before with respect to construction, hBe the liquid level of the benchmark container height to pressure transducer pressure-sensitive face, the height value that converses after pressure transducer is measured in the height value that the pressure transducer on the benchmark container is conversed and each flush type sedimentometer subtracts each other, and obtains Δ h
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Cited By (17)

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CN102607518A (en) * 2012-02-22 2012-07-25 石家庄铁道大学 Horizontal multipoint settlement monitoring device and monitoring method thereof based on hydraulic measurement
CN102620715A (en) * 2012-04-16 2012-08-01 河海大学 Observation method of foundation settlement based on liquid level difference
CN102721407A (en) * 2012-07-06 2012-10-10 中国石油大学(华东) Device and method for measuring ground surface settlement of underground salt cavern gas storage
CN103499340A (en) * 2013-09-27 2014-01-08 河海大学 Measurement device and measurement method for vertical great-height difference height transmission
CN104792304A (en) * 2015-04-29 2015-07-22 中交上海三航科学研究院有限公司 Hydraulic type layered settlement gauge, burying method and measuring method
CN104976988A (en) * 2015-07-14 2015-10-14 国家电网公司 Tunnel large-elevation-difference settlement measuring system
CN105095671A (en) * 2015-08-24 2015-11-25 三峡集团西藏能源投资有限公司 Real-time sedimentation monitoring early warning instrument, system and achieving method
CN107655452A (en) * 2017-10-19 2018-02-02 罗锦华 Hydraulic sensing formula settlement observation system
CN107727065A (en) * 2017-11-08 2018-02-23 山东科技大学 The sinking deformation monitoring system that drills and its monitoring method
CN108731635A (en) * 2018-07-12 2018-11-02 浙江省水利水电勘测设计院 A kind of dam profundal zone large deformation settlement observer and method
CN109458982A (en) * 2018-11-27 2019-03-12 山东康威通信技术股份有限公司 A kind of tunnel subsidence monitoring device and method
CN111058435A (en) * 2019-11-29 2020-04-24 上海建工集团股份有限公司 Method and device for layered settlement monitoring of deep soil body of soft soil stratum
CN111058436A (en) * 2019-11-29 2020-04-24 上海建工集团股份有限公司 Radial implantation device and method for settlement signal marker in soft soil stratum drill hole
CN113155086A (en) * 2021-02-26 2021-07-23 广西北投交通养护科技集团有限公司 Device and method for monitoring settlement of cross section of filling roadbed in highway reconstruction and extension
CN113483734A (en) * 2021-06-29 2021-10-08 中石化宁波工程有限公司 Device and method for monitoring embankment settlement
CN115493557A (en) * 2022-10-18 2022-12-20 杭州余杭建筑设计院有限公司 Building foundation settlement measuring device
CN116481491A (en) * 2023-06-20 2023-07-25 深圳市勘察研究院有限公司 Deep foundation pit ground subsidence monitoring devices

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CN108007854A (en) * 2017-11-07 2018-05-08 芜湖赛宝信息产业技术研究院有限公司 A kind of real-time automatic monitoring device of novel salt fog sedimentation rate

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JP2003148954A (en) * 2001-11-15 2003-05-21 Okumura Corp Instrument and method for measuring difference of elevation
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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607518A (en) * 2012-02-22 2012-07-25 石家庄铁道大学 Horizontal multipoint settlement monitoring device and monitoring method thereof based on hydraulic measurement
CN102607518B (en) * 2012-02-22 2016-05-18 石家庄铁道大学 Horizontal multiple spot settlement monitoring device and the monitoring method thereof measured based on fluid power
CN102620715A (en) * 2012-04-16 2012-08-01 河海大学 Observation method of foundation settlement based on liquid level difference
CN102721407A (en) * 2012-07-06 2012-10-10 中国石油大学(华东) Device and method for measuring ground surface settlement of underground salt cavern gas storage
CN102721407B (en) * 2012-07-06 2014-08-06 中国石油大学(华东) Device and method for measuring ground surface settlement of underground salt cavern gas storage
CN103499340A (en) * 2013-09-27 2014-01-08 河海大学 Measurement device and measurement method for vertical great-height difference height transmission
CN103499340B (en) * 2013-09-27 2015-06-10 河海大学 Measurement device and measurement method for vertical great-height difference height transmission
CN104792304A (en) * 2015-04-29 2015-07-22 中交上海三航科学研究院有限公司 Hydraulic type layered settlement gauge, burying method and measuring method
CN104976988A (en) * 2015-07-14 2015-10-14 国家电网公司 Tunnel large-elevation-difference settlement measuring system
CN104976988B (en) * 2015-07-14 2024-03-01 江苏省电力公司南京供电公司 Tunnel large-elevation-difference sedimentation measurement system
CN105095671B (en) * 2015-08-24 2018-08-14 三峡集团西藏能源投资有限公司 Settle Monitoring and forecasting system in real-time instrument and system and implementation method
CN105095671A (en) * 2015-08-24 2015-11-25 三峡集团西藏能源投资有限公司 Real-time sedimentation monitoring early warning instrument, system and achieving method
CN107655452A (en) * 2017-10-19 2018-02-02 罗锦华 Hydraulic sensing formula settlement observation system
CN107727065B (en) * 2017-11-08 2023-10-24 山东科技大学 Drilling sedimentation deformation monitoring system and monitoring method thereof
CN107727065A (en) * 2017-11-08 2018-02-23 山东科技大学 The sinking deformation monitoring system that drills and its monitoring method
CN108731635A (en) * 2018-07-12 2018-11-02 浙江省水利水电勘测设计院 A kind of dam profundal zone large deformation settlement observer and method
CN109458982A (en) * 2018-11-27 2019-03-12 山东康威通信技术股份有限公司 A kind of tunnel subsidence monitoring device and method
CN111058435A (en) * 2019-11-29 2020-04-24 上海建工集团股份有限公司 Method and device for layered settlement monitoring of deep soil body of soft soil stratum
CN111058436A (en) * 2019-11-29 2020-04-24 上海建工集团股份有限公司 Radial implantation device and method for settlement signal marker in soft soil stratum drill hole
CN113155086A (en) * 2021-02-26 2021-07-23 广西北投交通养护科技集团有限公司 Device and method for monitoring settlement of cross section of filling roadbed in highway reconstruction and extension
CN113155086B (en) * 2021-02-26 2022-11-25 广西北投交通养护科技集团有限公司 Device and method for monitoring section settlement of filling subgrade in highway reconstruction and extension
CN113483734A (en) * 2021-06-29 2021-10-08 中石化宁波工程有限公司 Device and method for monitoring embankment settlement
CN115493557A (en) * 2022-10-18 2022-12-20 杭州余杭建筑设计院有限公司 Building foundation settlement measuring device
CN115493557B (en) * 2022-10-18 2023-07-25 杭州余杭建筑设计院有限公司 Building foundation subsides measuring device
CN116481491A (en) * 2023-06-20 2023-07-25 深圳市勘察研究院有限公司 Deep foundation pit ground subsidence monitoring devices
CN116481491B (en) * 2023-06-20 2023-08-29 深圳市勘察研究院有限公司 Deep foundation pit ground subsidence monitoring devices

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