CN105735380B - A kind of monitoring device and method of foundation pit deeply mixing cement-soil pile and Vertical Settlement - Google Patents

A kind of monitoring device and method of foundation pit deeply mixing cement-soil pile and Vertical Settlement Download PDF

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Publication number
CN105735380B
CN105735380B CN201610237217.3A CN201610237217A CN105735380B CN 105735380 B CN105735380 B CN 105735380B CN 201610237217 A CN201610237217 A CN 201610237217A CN 105735380 B CN105735380 B CN 105735380B
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foundation pit
testing tube
data
monitoring
measuring
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CN105735380A (en
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陈航
胡贺松
苏键
张傲
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Guangzhou Construction Engineering Quality Safety Inspection Center Co Ltd
Guangzhou Institute of Building Science Co Ltd
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Guangzhou Construction Engineering Quality Safety Inspection Center Co Ltd
Guangzhou Institute of Building Science Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00Miscellaneous
    • E02D2600/10Miscellaneous comprising sensor means

Abstract

The invention discloses the monitoring device and method of a kind of foundation pit deeply mixing cement-soil pile and Vertical Settlement, monitoring device includes deformation measuring system, range-measurement system, datum mark and data processing system;The deformation measuring system, including several deformation detectors for being embedded in foundation pit side-wall are deformed for measuring the foundation pit side-wall soil body along the horizontal deflection of depth direction;The range-measurement system, for measuring the deformation measuring system vertex at a distance from range-measurement system;The datum mark is arranged far from the side of foundation pit side-wall;The data processing system, the data for receiving the deformation measuring system and the range-measurement system monitors, and the data received are handled, foundation pit deeply mixing cement-soil pile and Vertical Settlement are transferred to user terminal.The present invention monitors in real time while realizing foundation pit soil horizontal displacement and Vertical Settlement, need not carry out manual measurement, and high degree of automation reduces monitoring cost, and further ensures measurement accuracy and data reliability.

Description

A kind of monitoring device and method of foundation pit deeply mixing cement-soil pile and Vertical Settlement
Technical field
The invention belongs to technical field of building construction, and in particular to a kind of prison of foundation pit deeply mixing cement-soil pile and Vertical Settlement Survey device and method.
Background technology
The high speed development of Chinese Urbanization construction is faced with many stern challenges:Shortage of land resource, greenery area subtract Less, the problems such as the quick-fried increasing of urban population, traffic jam, energy consumption increase, environmental pollution, rising of housing price, these all make energetically Utilization Underground Space Resource, expansion mankind's activity space are more and more urgent.Therefore, the cutting depth of base pit engineering is increasingly Deeply, scale is increasing, and technical difficulty also constantly increases therewith.
In recent years, there are many safety accidents in the construction process in some underground engineerings and foundation pit, cause different journeys The people life property loss of degree.It is therefore desirable to the engineering safety of science prison is established during foundation pit and Underground Engineering Excavation Examining system avoids the generation of accident with the security risk that early warning foundation pit and underground engineering occur during construction and use.
The deeply mixing cement-soil pile and Vertical Settlement of foundation pit side-wall are the important indicators of foundation pit and underground engineering stability, but mesh Preceding widely applied foundation pit deformation monitoring method the degree of automation is low, labor intensity is high, it is difficult to realize real time monitoring, deep horizontal Displacement is different with the monitoring method settled vertically, further reduced monitoring efficiency, increases monitoring cost.For deep horizontal Displacement is presently mainly reported using inclinometer pipe and inclinometer progress manual measurement, reading again, and data lag is apparent;If Though can realize automatic measurement using multiple inclinometers are distributed along inclinometer pipe, mean that the several times of monitoring expense increase.For depth Layer vertical displacement, is presently mainly measured using total powerstation and level meter, and the data lag of manual measurement is equally faced with Or the problem of monitoring the growth of expense.
Invention content
The present invention monitors the degree of automation is low, labor intensity is high, Measurement and Data Processing lag etc. to solve foundation pit deformation Technical problem provides a kind of high degree of automation, the monitoring dress of the foundation pit deeply mixing cement-soil pile and Vertical Settlement that can monitor in real time It sets and method.
To solve the above-mentioned problems, the present invention is achieved by following technical scheme:
The monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement of the present invention, it is characterised in that:It is surveyed including deformation Amount system, range-measurement system, several datum marks and data processing system;
The deformation measuring system, including several deformation detectors for being embedded in foundation pit side-wall, for measuring foundation pit side Horizontal deflection deformation at wall soil body different depth;Obliquity sensor is equipped at the top of the deformation measuring system;
The range-measurement system, for measuring the deformation measuring system vertex at a distance from range-measurement system and ranging system The distance between system and datum mark;
The datum mark is arranged far from the ground of foundation pit side-wall side;
The data processing system, the data for receiving the deformation measuring system and the range-measurement system monitors, And the data received are handled, foundation pit deeply mixing cement-soil pile and Vertical Settlement are transferred to user terminal.
Further, the deformation measuring system further includes testing tube, and the testing tube is embedded in surveyed foundation pit side-wall Side, the deformation detector include several resistance strain gages being arranged in the testing tube, and the resistance strain gage is pairs of It is arranged in the sustained height position of testing tube, each pair of resistance strain gage line is vertically arranged with foundation pit side-wall;Each pair of resistance-strain Piece is one group, and every group of resistance strain gage is separated by a distance to be arranged in the testing tube.
Further, the testing tube plugs into be formed for one section one section, and measuring unit is provided in each section of testing tube;Institute It states testing tube top to elevate above the soil, and is provided with strain measurement terminal;
The resistance strain gage is connect with measuring unit by conducting wire, can be by radio communication between multiple measuring units Module realizes that data mutually pass, by the data transfer of all resistance strain gages to strain measurement terminal;The strain measurement is whole Module is connected with data processing system communication by radio communication at end.
Further, each segment length 0.5m~2m of the testing tube, the testing tube are also set up in the one end elevated above the soil There are obliquity sensor, the obliquity sensor to be connect by conducting wire with strain measurement terminal.
Further, it is divided into 10cm~20cm between vertical direction adjacent resistor foil gauge;
The testing tube includes the half slot installed that cooperates, and passes through between the half slot and buckles sealed connection;Or Pass through welding, the connection of glue adhesive seal.In half slot after adhering resistance strain sheets, two halves circular groove is connected again, convenient Installation.
Further, the range-measurement system includes being arranged in the speculum of testing tube top and datum mark, being arranged on ground On supporting rod, be arranged on supporting rod several laser range finders, be automatically aligned to structure and wireless communication module;
The structure that is automatically aligned to is for connecting the laser range finder and supporting rod;
It is described to be automatically aligned to speculum that structure is adjusted at the top of the laser and testing tube that the laser range finder is sent out and hang down Directly;Or the laser that one laser range finder of adjusting is sent out is vertical with the speculum on datum mark;The laser range finder passes through institute Wireless communication module is stated to connect with data processing system communication.
Further, the laser range finder is three, and two of which is for measuring testing tube top and corresponding Laser Measuring The distance of distance meter, one of them is used for the distance between datum mark and corresponding laser range finder;
The laser range finder is arranged at intervals on supporting rod;It is flat where when the supporting rod and testing tube original state Face is perpendicular to foundation pit side-wall;
The datum mark totally three, it is being the position of 3 times~5 times of foundation depth at a distance from foundation pit side-wall to be arranged, and three A datum mark is not conllinear, and speculum is provided on datum mark.
Further, the data processing system includes input equipment, data storage device, output equipment, controller;
The input equipment, the data for receiving deformation measuring system and range-measurement system monitors;
The data storage device, for storing the data received;
The controller, the data that processing analysis receives, obtains foundation pit deeply mixing cement-soil pile and Vertical Settlement data;
Obtained foundation pit deeply mixing cement-soil pile and Vertical Settlement data are conveyed to user terminal by the output equipment.
A kind of monitoring method of foundation pit deeply mixing cement-soil pile and Vertical Settlement, includes the following steps:
S1, the pre-buried testing tube straight down at foundation pit side-wall 0.3m~0.50m, and the top of testing tube is stretched out Ground 0.5m~1m;Several resistance strain gages are pasted in the testing tube, the resistance strain gage is arranged in pairs in testing tube In identical height, the line of two resistance strain gages is perpendicular to foundation pit side-wall;Each pair of resistance strain gage is one group, every group of resistance-strain Piece is arranged at intervals in testing tube.
S2, it is being the position setting supporting rod of 1 times~1.5 times of foundation depth at a distance from foundation pit side-wall, on supporting rod Several laser range finders, including two first laser rangefinders and a second laser rangefinder are set;And on the top of testing tube End setting object of reference, between two of which first laser stadia surveying object of reference and each first laser rangefinder away from From;The top of testing tube is additionally provided with the obliquity sensor for measuring testing tube deviation angle.
S3, multiple datum marks are being set far from the position that one lateral extent of foundation pit side-wall is 3 times~5 times of foundation depth, it is described The position of datum mark is not conllinear;The distance between second laser stadia surveying second laser rangefinder and datum mark;
After S4, monitoring device install, the reading of each resistance strain gage and obliquity sensor is zeroed.
The data that S5, resistance strain gage, rangefinder and obliquity sensor will monitor, module transfer is extremely by radio communication Data processing system.
The data that S6, data processing system processing and analysis receive, and data processed result is sent to the user terminal.
Compared with prior art, the beneficial effects of the invention are as follows:
(1) present invention testing tube pre-buried on the soil body apart from foundation pit side-wall, resistance strain gage is arranged in testing tube, has Effect ground measures deflection deformation of the soil body along depth direction, and laser range finder is combined to measure the displacement at the top of testing tube, inclination angle Change of pitch angle at the top of sensor measurement testing tube is accurately obtained each soil body of foundation pit deep layer by a series of mathematical model Horizontal displacement and Vertical Settlement, high certainty of measurement, high degree of automation, and further reduced monitoring cost.
Description of the drawings
Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, wherein:
Fig. 1 is the structural schematic diagram of the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement of the present invention;
Fig. 2 is the measuring principle figure of the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement of the present invention.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
As shown in Fig. 1~Fig. 2, the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement of the present invention, including become Shape measuring system 1, range-measurement system 2, several datum marks and data processing system 8.
The deformation measuring system 1 includes several deformation detectors being embedded in foundation pit side-wall, for measuring foundation pit side The wall soil body is deformed along the horizontal deflection of depth direction.
The range-measurement system 2 is for measuring on the deformation measuring system 1 vertex at a distance from range-measurement system 2, Yi Jiji On schedule the distance between with range-measurement system 2.
The datum mark is arranged far from the ground of foundation pit side-wall side;Datum mark in the present embodiment is three, three A datum mark is not on same straight line.
The data processing system 8, the number for receiving the deformation measuring system 1 and the range-measurement system 2 monitors According to, and the data received are handled, foundation pit deeply mixing cement-soil pile and Vertical Settlement are transferred to user terminal.
The deformation measuring system 1 includes the testing tube 4 being embedded in the soil body apart from foundation pit side-wall certain distance, described Deformation detector includes several resistance strain gages 7 being arranged in the testing tube 4, and the resistance strain gage 7 is arranged in pairs in The sustained height position of testing tube 4,7 line of each pair of resistance strain gage are vertically arranged with foundation pit side-wall;7 phase of each pair of resistance strain gage It is arranged in the testing tube 4 every 10cm~20cm;In the present embodiment, adjacent each pair of foil gauge is separated by 15cm on vertical direction. The testing tube 4 includes mutually matched half slot, is tightly connected between the half slot by buckling, or pass through welding, glue Water adhesive seal is connected and fixed, and resistance strain gage 7 is pasted onto in testing tube, then half slot is attached, and testing tube is formed 4。
Be provided with measuring unit 5 on the testing tube 7, the measuring unit 5 include strain acquirement chip 51, power supply 52, Third communication module 53, one end that the testing tube 4 elevates above the soil are additionally provided with strain measurement terminal 6, and the strain measurement is whole End 6 includes terminal supplying power 64, obliquity sensor 63, data aggregation module 62 and first communication module 61.The strain acquirement core Piece 51 acquires the deflection of resistance strain gage 7, and monitoring data are then transmitted to data set molding by third communication module 53 Block 62, the obliquity sensor 63 are used to measure the angle of inclination on 4 top of testing tube, and monitoring data are transferred to collection modules 62, the measurement data in the data aggregation module 62 can be passed through 4G network transmissions to data by the first communication module 61 Processing system 8.
4 top of the testing tube is elevated above the soil, and the resistance strain gage 7 is arranged by pasting in testing tube, Duo Ge Three communication modules 53 can realize that data mutually pass by local area network such as Wifi, Zigbee and bluetooths.
The range-measurement system 2 includes being arranged in the speculum 11 of 4 top of testing tube and datum mark, the branch of setting on the ground Strut, several laser range finders being arranged on supporting rod are automatically aligned to structure 13 and the second wireless communication module 14.Institute It states and is automatically aligned to structure 13 for connecting the laser range finder and supporting rod;In the present embodiment, it is provided on the supporting rod Three laser range finders, it is described automatic right including two first laser rangefinders 12 and a second laser rangefinder 15 It is vertical with the speculum 11 at the top of testing tube that the laser that the first laser rangefinder 12 is sent out is adjusted in quasi- structure 13;It is described from It is vertical with the speculum on datum mark that the laser that second laser rangefinder 15 is sent out is adjusted in dynamic align structures.The supporting rod is such as The holder of monitoring camera.The second communication module 14 is by the data transmission measured by the laser range finder to data processing System 8.
Be provided with supporting rod on the ground, the supporting rod with when testing tube original state where plane perpendicular to base Side wall is cheated, the laser range finder is arranged at intervals on supporting rod, and the supporting rod is arranged in the foundation pit at a distance from foundation pit side-wall The position that 1 times~1.5 times of depth, in the present embodiment, the position of the supporting rod is arranged at 1.5 times at a distance from foundation pit side-wall Position.
The data processing system 8 includes input equipment 19, data storage device 16, output equipment 17, controller 20, is used for Access the network insertion mouth 18 of internet.
The input equipment 19 is measured for receiving resistance strain gage 7, obliquity sensor 63 and first laser rangefinder 12 Data;
The data storage device 16, for storing the data received;
The controller 20, the data that processing analysis receives, obtains foundation pit deeply mixing cement-soil pile and Vertical Settlement data;
Obtained foundation pit deeply mixing cement-soil pile and Vertical Settlement data are conveyed to user terminal by the output equipment 17.
The monitoring method of foundation pit deeply mixing cement-soil pile and Vertical Settlement of the present invention, includes the following steps:
S1, pre-buried testing tube 4, testing tube 4 are one section one section and plug into straight down at foundation pit side-wall 0.30m~0.50m Formed, can preceding one end testing tube it is pre-buried to half when, next section of testing tube of plugging into, the length of every section of testing tube be 0.5m~ 2m;And finally 0.5m~1m so that the top of testing tube 4 is elevated above the soil;Several resistance-strains are pasted in the testing tube 4 Piece 7, the resistance strain gage 7 are arranged in pairs in the identical height of testing tube, and the line of two resistance strain gages is perpendicular to foundation pit side Wall;The resistance strain gage setting separated by a distance being arranged in pairs is in testing tube.
S2, it is being the position of 1 times~1.5 times of foundation depth setting supporting rod at a distance from foundation pit side-wall, in the present embodiment Supporting rod apart from 1.5 times of foundation depth,;And speculum corresponding with rangefinder is set on the top of testing tube, wherein first Laser range finder 12 measures the distance between object of reference and corresponding first laser rangefinder 12;The top of testing tube is additionally provided with use In the obliquity sensor for measuring testing tube deviation angle.
S3, multiple datum marks, this reality are being set far from the position that one lateral extent of foundation pit side-wall is 3 times~5 times of foundation depth The position that datum mark in example is arranged far from 4 times of one lateral extent foundation depth of foundation pit side-wall is applied, the position of the datum mark is not total Line;The second laser rangefinder 15 measures the distance between the second laser rangefinder and datum mark.
After S4, monitoring device install, the reading of each resistance strain gage and obliquity sensor is zeroed.
The data that S5, resistance strain gage, laser range finder and obliquity sensor will monitor, are transmitted to by wireless module Data processing system.
The data that S6, data processing system processing and analysis receive, and data processed result is sent to the user terminal.
S7, to number each resistance strain gage from top to bottom be 1+, 1-, 2+, 2-, 3+, 3- ... n+ and n-, wherein+number table Show at sustained height apart from the farther measuring point of foundation pit side-wall;
By the depth h of each resistance strain gage1+、h1-、h2+、h2-、……hn+And hn-Input data processing system, wherein hi+= hi-=hi(i=1,2 ... n);
The object of reference is that the speculum being arranged on the testing tube top and datum mark is arranged,
The height difference H of two laser range finders is measured, and measures two laser range finders respectively to the first of corresponding speculum The distance that begins s01And s02(s01<s02);
T moment in monitoring process measures two laser range finders and speculum distance s1(t) and s2(t), inclination angle The data that sensor measurement arrives are θ (t);
The distance that second laser 15 to three benchmark of rangefinder point out speculum is measured respectively, to calculate range-measurement system phase For itself reset condition perpendicular to the horizontal displacement w of foundation pit side-wall0(t) and vertically Δ H (t) is settled;
Controller calculates foundation pit deep layer earth's surface Vertical Settlement by following mathematical model:
S8, the reading strain for reading each resistance strain gage of t moment, are denoted as the reading strain for reading each resistance strain gage, remember For ε (h1+,t)、ε(h1-,t)、ε(h2+,t)、ε(h2-,t)、……ε(hn+, t) and ε (hn-, t), at each resistance strain gage section The curvature of testing tube can be written as
Wherein, d0For the internal diameter of testing tube.
S9:By following mathematical model, the rotational angle theta (h of each depth is obtainedi,t)
Wherein, θ (h0, t)=- | θ (t) |.
S10:Controller obtains deeply mixing cement-soil pile w (h by following mathematical modeli, t) be
Wherein
Wherein
Wherein, deeply mixing cement-soil pile is to be just towards foundation pit inside.
The present invention pre-buried testing tube on the soil body apart from foundation pit side-wall, is arranged resistance strain gage, effectively in testing tube Ground measures deflection deformation of the soil body along depth direction, and laser range finder is combined to measure the displacement at the top of testing tube, and inclination angle passes The change of pitch angle that sensor measures at the top of testing tube is accurately obtained the water of each soil body of foundation pit deep layer by a series of mathematical model Prosposition moves and Vertical Settlement, high certainty of measurement, high degree of automation, and further reduced monitoring cost.
The other structures of the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement are referring to existing skill described in the present embodiment Art.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore It is every without departing from technical solution of the present invention content, according to the technical essence of the invention to made by above example it is any modification, Equivalent variations and modification, in the range of still falling within technical solution of the present invention.

Claims (9)

1. a kind of monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement, it is characterised in that:Including deformation measuring system, survey Away from system, several datum marks and data processing system;
The deformation measuring system, including several deformation detectors for being embedded in foundation pit side-wall, for measuring foundation pit side-wall soil Horizontal deflection deformation at body different depth;Obliquity sensor is equipped at the top of the deformation measuring system;
The range-measurement system, for measure the deformation measuring system vertex at a distance from range-measurement system and range-measurement system with The distance between datum mark;
The datum mark is arranged far from the ground of foundation pit side-wall side;
The data processing system, the data for receiving the deformation measuring system and the range-measurement system monitors, and locate The data received are managed, foundation pit deeply mixing cement-soil pile and Vertical Settlement are transferred to user terminal.
2. the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement according to claim 1, the deformation measuring system Further include testing tube, the testing tube is embedded in the side of surveyed foundation pit side-wall, and the deformation detector includes that several settings exist Resistance strain gage in the testing tube, the resistance strain gage are arranged in pairs in the sustained height position of testing tube, Mei Dui electricity Resistance foil gauge line is vertically arranged with foundation pit side-wall;Each pair of resistance strain gage is one group, and every group of resistance strain gage is separated by a spacing From setting in the testing tube.
3. the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement according to claim 2, the testing tube is one section One section is plugged into be formed, and measuring unit is provided in each section of testing tube;The testing tube top is elevated above the soil, and is provided with strain Measuring terminals;
The resistance strain gage is connect with measuring unit by conducting wire, can module by radio communication between multiple measuring units Realize that data mutually pass, by the data transfer of all resistance strain gages to strain measurement terminal;
The testing tube is additionally provided with obliquity sensor, the obliquity sensor and strain measurement terminal in the one end elevated above the soil It is connected by conducting wire;
Module connects the strain measurement terminal with data processing system communication by radio communication.
4. the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement according to claim 3, each section of the testing tube Long 0.5m~2m;
It is divided into 10cm~20cm between vertical direction adjacent resistor foil gauge;
The testing tube includes the half slot installed that cooperates, and passes through between the half slot and buckles sealed connection;Or pass through Welding, the connection of glue adhesive seal.
5. the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement according to claim 2, the range-measurement system include It is arranged in the speculum of testing tube top and datum mark, setting supporting rod on the ground, several swashing of being arranged on supporting rod Optar is automatically aligned to structure and wireless communication module;
The structure that is automatically aligned to is for connecting the laser range finder and supporting rod;
It is described to be automatically aligned to structure that the laser that the laser range finder is sent out is adjusted is vertical with the speculum at the top of testing tube;Or It is vertical with the speculum on datum mark that person adjusts the laser that a laser range finder is sent out;The laser range finder passes through described wireless Communication module is connected with data processing system communication.
6. the monitoring device of foundation pit deeply mixing cement-soil pile and Vertical Settlement according to claim 5, the laser range finder are Three, for two of which for measuring at the top of testing tube at a distance from corresponding laser range finder, one of them is used for datum mark The distance between corresponding laser range finder;
The laser range finder is arranged at intervals on supporting rod;Plane where when the supporting rod and testing tube original state is hung down Directly in foundation pit side-wall;
The datum mark totally three is arranged in the position for 3 times~5 times of foundation depth at a distance from foundation pit side-wall, and three bases It is on schedule not conllinear, speculum is provided on datum mark.
7. according to the monitoring device of any one of claim 1 to the 6 foundation pit deeply mixing cement-soil pile and Vertical Settlement, the data Processing system includes input equipment, data storage device, output equipment, controller;
The input equipment, the data for receiving deformation measuring system and range-measurement system monitors;
The data storage device, for storing the data received;
The controller, the data that processing analysis receives, obtains foundation pit deeply mixing cement-soil pile and Vertical Settlement data;
Obtained foundation pit deeply mixing cement-soil pile and Vertical Settlement data are conveyed to user terminal by the output equipment.
8. a kind of monitoring method of foundation pit deeply mixing cement-soil pile and Vertical Settlement, it is characterised in that:Include the following steps:
S1, the pre-buried testing tube straight down at foundation pit side-wall 0.3m~0.50m, and the top of testing tube is elevated above the soil 0.5m~1m;Several resistance strain gages are pasted in the testing tube, it is identical that the resistance strain gage is arranged in pairs in testing tube In height, the line of two resistance strain gages is perpendicular to foundation pit side-wall;Each pair of resistance strain gage is one group, between every group of resistance strain gage Every setting in testing tube;
S2, it is being the position setting supporting rod of 1 times~1.5 times of foundation depth at a distance from foundation pit side-wall, is being arranged on supporting rod Several laser range finders, including two first laser rangefinders and a second laser rangefinder;And it is set on the top of testing tube Set object of reference, the distance between two of which first laser stadia surveying object of reference and each first laser rangefinder;It surveys The top of test tube is additionally provided with the obliquity sensor for measuring testing tube deviation angle;
S3, multiple datum marks, the benchmark are being set far from the position that one lateral extent of foundation pit side-wall is 3 times~5 times of foundation depth The position of point is not conllinear;The distance between second laser stadia surveying second laser rangefinder and datum mark;
After S4, monitoring device install, the reading of each resistance strain gage and obliquity sensor is zeroed;
The data that S5, resistance strain gage, rangefinder and obliquity sensor will monitor, by radio communication module transfer to data Processing system;
The data that S6, data processing system processing and analysis receive, and data processed result is sent to the user terminal.
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