CN110468889A - A kind of miniature steel pipe stake body soil pressure sensor installation aiding device and method - Google Patents

A kind of miniature steel pipe stake body soil pressure sensor installation aiding device and method Download PDF

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Publication number
CN110468889A
CN110468889A CN201910697634.XA CN201910697634A CN110468889A CN 110468889 A CN110468889 A CN 110468889A CN 201910697634 A CN201910697634 A CN 201910697634A CN 110468889 A CN110468889 A CN 110468889A
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CN
China
Prior art keywords
miniature
steel pipe
resistance
pipe pile
ty02a
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Pending
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CN201910697634.XA
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Chinese (zh)
Inventor
张亚妹
于德湖
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Qingdao University of Technology
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Qingdao University of Technology
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Application filed by Qingdao University of Technology filed Critical Qingdao University of Technology
Priority to CN201910697634.XA priority Critical patent/CN110468889A/en
Publication of CN110468889A publication Critical patent/CN110468889A/en
Priority to PCT/CN2020/103599 priority patent/WO2021017984A1/en
Priority to US17/581,912 priority patent/US20220145574A1/en
Pending legal-status Critical Current

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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 belongs to pile foundation engineering field test technical fields, it is related to a kind of miniature steel pipe stake body soil pressure sensor installation aiding device and guard method, predetermined position drilling and throat thickness are slightly below the sensor metal coating shell of the miniature earth pressure gauge of XY-TY02A resistance-type on the outside of pile body, the miniature earth pressure gauge of XY-TY02A resistance-type is pasted with AB glue, the transmission line of the miniature earth pressure gauge of XY-TY02A resistance-type is drawn inside steel-pipe pile by sensor mounting hole and is connected to data collection system, its device simple structure, it is simple to operate, it is reliable and stable, measure precision and high survival rate, it is at low cost to use manpower and material resources sparingly the time, the soil pressure variation of the miniature steel pipe pile supporting of energy real-time monitoring ground foundation pit, there is provided test data to the miniature steel pipe pile support theory of field monitoring Rock soil Foundation and And reference value is provided for engineering practice.

Description

A kind of miniature steel pipe stake body soil pressure sensor installation aiding device and method
Technical field:
The invention belongs to pile foundation engineering field test technical fields, are related to a kind of applied to rock pit supporting miniature steel pipe Stake Internal Force Monitoring device and method, especially a kind of miniature steel pipe stake body soil pressure sensor installation aiding device and guard method.
Background technique:
Miniature steel pipe pile refers generally to a diameter in 100-300mm, and draw ratio is greater than 30, using strong arrangement of reinforcement and the slip casing by pressure of drilling The bored concrete pile of construction technology, when construction, only need light-duty construction equipment, and pile layout is flexible, and speed of application is fast, to construction site Adaptable, the advantages that effect on environment is small.Thus, miniature steel pipe pile cooperates the preliminary micro pile composite earth of soil nailing, anchor pole Nail supporting, mini pile-prestressed anchor composite soil nailing wall etc. are widely applied in construction projects.In view of the stratum Tu Yan is not easy to bore Hole and decentralization miniature steel pipe pile process be easy to break earth pressure gauge, for guarantee Excavation Process energy real-time monitoring soil it is lateral Pressure is simultaneously protected earth pressure gauge, welds in the position of pile body installation soil pressure cell with metal coating shell.In excavation of foundation pit In the process, miniature steel pipe pile is occured bending and deformation by under biggish lateral Water And Earth Pressures effect, for effectively monitoring miniature steel pipe The stress effect of stake guarantees construction safety and construction quality, and provides data for design, it is necessary to right in Excavation Process Miniature steel pipe pile soil lateral pressure carries out real-time monitoring, it is ensured that steel-pipe pile stress meets safety requirements.
Currently, the detection application of miniature steel pipe pile pile foundation soil pressure it is more be paste foil gauge in pile body, but its be easy by Tide, survival rate are lower, sealant cannot have the shortcomings that bubble, and the miniature earth pressure gauge of resistance-strain type is to turn the variation being measured The variation for changing sensing element resistance value into is becoming electric signal output, compared with traditional foil gauge, resistance by conversion circuit There is the miniature earth pressure gauge of strain-type simple structure, laborsaving, highly sensitive, high-precision, electric signal to export stable, small in size, matter Light, good waterproof performance, good temperature self-compensation are measured, the advantages that dynamic measures is also adapted to.Therefore, seek a kind of miniature steel pipe Stake body soil pressure cell installation aiding device and method, to steel pipe stake body soil lateral pressure real-time monitoring in short-term.
Summary of the invention:
It is an object of the invention to overcome the deficiencies in the prior art and defect, propose a kind of miniature steel pipe stake body soil pressure Installation aiding device and guard method are counted, is drilled by installing earth pressure gauge position in miniature steel pipe stake body, and weld on the outside The metal coating shell and stickup earth pressure gauge of earth pressure gauge, measure the development and change of pile body soil lateral pressure and internal force.
To achieve the goals above, the main body of miniature steel pipe stake body resistance-type earth pressure gauge installation aiding device of the present invention Structure includes miniature steel pipe pile, the miniature earth pressure gauge of XY-TY02A resistance-type, transmission line, sensor metal coating shell, bar planting Glue, adhesive waterproof tape, resistance test deformeter, sensor mounting hole, data store computer, weld seam, crown beam, waist rail;Miniature steel pipe Stake uses diameter 127mm, thickness 5mm, 12.7 meters of length of seamless steel pipe, is equipped with crown beam, outside at the top of miniature steel pipe pile Waist rail is evenly distributed on face, sensor mounting hole is the diameter 5mm circle formed in a manner of gas flame cuttiug in miniature steel pipe pile Hole, the vertical symmetry axis of circular hole is along miniature steel pipe pile vertical non-alignment, sensor mounting hole cross-section centroid and XY-TY02A resistance-type The stress film side centroid of miniature earth pressure gauge is overlapped;Sensor metal coating shell uses with miniature steel pipe pile material identical but ruler Very little different seamless steel pipe, internal diameter 25mm, length 5mm, wall thickness 5mm sensor metal coating shell arrange in a welding manner In the position of the miniature steel pipe pile outer surface installation miniature earth pressure gauge of XY-TY02A resistance-type, installation XY-TY02A resistance-type is miniature The position of earth pressure gauge is polished with electric polishing machine and to carry out arc portion position to miniature steel pipe pile levelling;XY-TY02A resistance-type is miniature Earth pressure gauge uses bottom surface outlet method, and diameter is 20mm with a thickness of 6.5mm, and range is determined as according to actual requirement of engineering The number of the miniature earth pressure gauge of 5MPa, XY-TY02A resistance-type is by the way that the stake of miniature steel pipe pile is long and the root of pile body prestressed anchor Number determines;The side alignment sensor mounting hole of bottom surface outlet is packed into sensor peace by the miniature earth pressure gauge of XY-TY02A resistance-type It fills in hole, and is pasted on miniature steel pipe pile by anchoring adhesive, transmission line is using diameter 3mm, the water conservancy project electricity with waterproof effect Cable, adhesive waterproof tape are wrapped on the transmission line near sensor mounting hole, and the end of a thread of transmission line is worn by sensor mounting hole It crosses, eventually arrive at the top of miniature steel pipe pile and is connected with resistance test deformeter, resistance test deformeter and data store computer It is connected.
The specific embodiment that miniature steel pipe stake body soil pressure sensor of the present invention is laid are as follows:
(1) according to the stake of miniature steel pipe pile is long and the radical of pile body prestressed anchor determines the miniature soil pressure of each resistance-type The water conservancy project cable of the number and spacing of meter, the miniature earth pressure gauge of XY-TY02A resistance-type is protected by the way of interior cabling Shield;
(2) the miniature earth pressure gauge of XY-TY02A resistance-type first connects resistance test strain before miniature steel pipe pile installation Instrument and data store computer, on the one hand check whether cable fractures, and on the other hand examine the miniature soil pressure sensor of resistance-type Whether fail.
(3) installation site according to the miniature earth pressure gauge of XY-TY02A resistance-type in miniature steel pipe pile, in miniature steel pipe Stake outer wall draws position and the size of sensor mounting hole with chalk, in miniature steel pipe pile pore-forming in a manner of gas flame cuttiug, passes Centroid is overlapped sensor mounting hole cross-section centroid with each force acting on transducer film side as far as possible, after miniature steel pipe pile is cooling, electricity consumption Dynamic sanding machine polishes to the position of the miniature steel pipe pile outer wall installation miniature earth pressure gauge of XY-TY02A resistance-type, and carries out arc Portion is levelling;
(4) in the position of the miniature steel pipe pile outer wall installation miniature earth pressure gauge of XY-TY02A resistance-type, soldered sensor gold Belong to protection shell 4, sensor metal coating outer cover length direction is slightly below the miniature earth pressure gauge 2 of XY-TY02A resistance-type;
(5) by the cable of each miniature earth pressure gauge of XY-TY02A resistance-type from miniature steel pipe pile sensor mounting hole Position penetrates the inside of miniature steel pipe pile, and the miniature earth pressure gauge of XY-TY02A resistance-type is filled in sensor metal coating shell And it is pasted into miniature steel pipe pile with anchoring adhesive, it is ensured that firm pasting, gap are filled with glue, and firm pasting is followed by the resistance survey that is powered It tries deformeter and data stores computer, examine the survival rate of the miniature earth pressure gauge of XY-TY02A resistance-type, be lower than it must not 90%, the miniature earth pressure gauge of XY-TY02A resistance-type for needing to remove damage is reinstalled;For the line near anti-mounting hole It destroys, is wrapped in adhesive waterproof tape and is protected.
(6) construction part of miniature steel pipe pile is determined on construction ground, and using borehole cleaning after down-the-hole technique pore-forming, aperture is bigger In the diameter of miniature steel pipe pile;The miniature steel pipe pile for installing the miniature earth pressure gauge of XY-TY02A resistance-type is put into the hole being drilled It is interior, it is slowly sent to the designed elevation of stake, it is noted that protection XY-TY02A resistance-type is miniature in miniature steel pipe pile work progress Earth pressure gauge and sensor metal coating shell;
(7) by Grouting Pipe insertion miniature steel pipe pile bottom, by the cement slurry mixed pass through slip casting machine slowly inject it is miniature In steel-pipe pile, the ratio of mud 0.5:1 of cement slurry, miniature steel pipe pile slip casting is using first down tube post grouting process, miniature steel pipe pile edge Slurry outlet is vertically arranged according to practical geological condition, sets two every 500mm when passing through soil layer and strong-weathered rockPulp Hole, slurry outlet press quincunx interlaced arrangement;The moment is wanted to pay attention to the pressure gauge in Grouting Pipe during slip casting, it is ensured that grouting pressure reaches To 0.5MPa, Grouting Pipe wouldn't be pulled out after slip casting, until cement slurry flows out outside miniature steel pipe pile, extract Grouting Pipe, sealing Steel tube end part pressurizes 5 minutes, until flowing out outside steel pipe again to cement slurry, extracts Grouting Pipe, completes slip casting operation;
(8) the miniature earth pressure gauge of XY-TY02A resistance-type, resistance test deformeter and data storage computer are connected, detection The survival rate of the miniature earth pressure gauge of XY-TY02A resistance-type;
(9) monitoring 1 time before cement slurry initial set, in entire Support of Foundation Pit Excavation construction period, observation 1 time daily.Foundation pit After the completion of excavation supporting, every 3-7d is observed 1 time, miniature steel pipe pile body soil pressure is calculated using formula P=μ ε × K, wherein P For pressure value, unit kPa;μ ε is dependent variable;K is calibration coefficient.
Compared with prior art, the present invention predetermined position drilling and throat thickness are slightly below XY-TY02A electricity on the outside of pile body The sensor metal coating shell of the miniature earth pressure gauge of resistive pastes the miniature earth pressure gauge of XY-TY02A resistance-type, XY- with AB glue The transmission line of the miniature earth pressure gauge of TY02A resistance-type extraction and data collection system inside steel-pipe pile by sensor mounting hole Connection, device simple structure is simple to operate, reliable and stable, measures precision and high survival rate, saving manpower at low cost Material resources time, the soil pressure variation of the miniature steel pipe pile supporting of energy real-time monitoring ground foundation pit, to field monitoring Rock soil Foundation Miniature steel pipe pile support theory provides test data and provides reference value for engineering practice.
Detailed description of the invention:
Fig. 1 is the pile body artwork of the miniature earth pressure gauge of XY-TY02A resistance-type described in the embodiment of the present invention.
Fig. 2 is the elevation of sensor metal coating shell of the present invention.
Fig. 3 is the sectional view of sensor metal coating shell of the present invention.
Fig. 4 is that the miniature earth pressure gauge bottom surface outlet method of XY-TY02A resistance-type of the present invention lays perspective view.
Fig. 5 is the artwork of the miniature earth pressure gauge of XY-TY02A resistance-type of the present invention.
Fig. 6 is the top view of the miniature earth pressure gauge of XY-TY02A resistance-type of the present invention.
Fig. 7 is the sectional detail drawing of the miniature earth pressure gauge of XY-TY02A resistance-type of the present invention.
Specific embodiment:
The present invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment:
The main structure of miniature steel pipe stake body resistance-type earth pressure gauge installation aiding device includes miniature steel described in the present embodiment The miniature earth pressure gauge 2 of tubular pole 1, XY-TY02A resistance-type, transmission line 3, sensor metal coating shell 4, anchoring adhesive 5, marine glue Band 6, resistance test deformeter 7, sensor mounting hole 8, data store computer 9, weld seam 10, crown beam 11, waist rail 12;Miniature steel pipe Stake 1 uses diameter 127mm, thickness 5mm, 12.7 meters of length of seamless steel pipe, and the top of miniature steel pipe pile 1 is equipped with crown beam 11, Waist rail 12 is evenly distributed on lateral surface, sensor mounting hole 8 is in a manner of gas flame cuttiug in the straight of the formation of miniature steel pipe pile 1 Diameter 5mm circular hole, the vertical symmetry axis of circular hole is along 1 vertical non-alignment of miniature steel pipe pile, 8 cross-section centroid of sensor mounting hole and XY- The stress film side centroid of the miniature earth pressure gauge 2 of TY02A resistance-type is overlapped;Sensor metal coating shell 4 uses and miniature steel pipe The stake seamless steel pipe that 1 material is identical but size is different, the sensor metal coating shell 4 of internal diameter 25mm, length 5mm, wall thickness 5mm It is arranged in the position of 1 outer surface of the miniature steel pipe pile installation miniature earth pressure gauge 2 of XY-TY02A resistance-type, installation in a welding manner It is polished with electric polishing machine and arc portion position is carried out to miniature steel pipe pile 1 and looked in the position of the miniature earth pressure gauge 2 of XY-TY02A resistance-type It is flat;The miniature earth pressure gauge 2 of XY-TY02A resistance-type uses bottom surface outlet method, and diameter is 20mm with a thickness of 6.5mm, range according to Actual requirement of engineering is determined as 5MPa, and the number of the miniature earth pressure gauge 2 of XY-TY02A resistance-type is long by the stake of miniature steel pipe pile 1 And the radical of pile body prestressed anchor determines;The side of bottom surface outlet is aligned and passes by the miniature earth pressure gauge 2 of XY-TY02A resistance-type Sensor mounting hole 8 is packed into sensor mounting hole 8, and is pasted on miniature steel pipe pile 1 by anchoring adhesive 5, and transmission line 3 is using straight Diameter 3mm, the water conservancy project cable with waterproof effect, adhesive waterproof tape 6 are wrapped on the transmission line 3 near sensor mounting hole 8, are passed The end of a thread of defeated line 3 is passed through by sensor mounting hole 8, eventually arrive at 1 top of miniature steel pipe pile and with 7 phase of resistance test deformeter Even, resistance test deformeter 7 is connected with data storage computer 9.
The specific embodiment that the present embodiment lays miniature steel pipe stake body soil pressure sensor are as follows:
(1) the miniature earth pressure gauge 2 of XY-TY02A resistance-type is first connected resistance test and is answered before the installation of miniature steel pipe pile 1 Become instrument 7 and data store computer 9, on the one hand checks whether cable fractures, on the other hand examine XY-TY02A resistance-type miniature Whether earth pressure gauge 2 fails;
(2) away from 1 stake top of miniature steel pipe pile successively 1m, 1.9m, 2.7m, 3.4m, 4.4m, 5.4m, 6.4m, 7.4m, 8.4m, The pile body outer fix of 9.4m, 10.4m, 11.2m, 11.7m (being symmetrically arranged) draw the position of sensor mounting hole 8 with chalk Set and size, in 1 pore-forming of miniature steel pipe pile in a manner of gas flame cuttiug, the cross-section centroid of sensor mounting hole 8 as far as possible with it is each A miniature 2 stress film side centroid of earth pressure gauge of resistance-type is overlapped;After miniature steel pipe pile is cooling, with electric polishing machine to miniature steel The position of 1 outer wall of the tubular pole installation miniature earth pressure gauge 2 of XY-TY02A resistance-type is polished, levelling to 1 arc portion of miniature steel pipe pile;
(3) in the position of 1 outer wall of the miniature steel pipe pile installation miniature earth pressure gauge 2 of XY-TY02A resistance-type, internal diameter is welded The sensor metal coating shell 4 of 34mm, length 10mm, wall thickness 5mm, 4 length direction of sensor metal coating shell are slightly below The miniature earth pressure gauge 2 of XY-TY02A resistance-type;
(4) by the cable 3 of the miniature earth pressure gauge 2 of each XY-TY02A resistance-type from the position of sensor mounting hole 8 The miniature earth pressure gauge 2 (diameter 29mm, thickness 11mm) of XY-TY02A resistance-type is filled in biography by the inside for penetrating miniature steel pipe pile 1 It is pasted into miniature steel pipe pile in sensor metal coating shell 4 and with AB glue 5, the miniature earth pressure gauge 2 of XY-TY02A resistance-type Stress film side towards the soil body, to ensure that firm pasting, gap anchoring adhesive 5 are filled, check sticking Quality after glue is dry, paste Securely be followed by logical resistance test deformeter 7 and store computer 9 with data, examine the miniature earth pressure gauge 2 of XY-TY02A resistance-type at Motility rate makes it must not be lower than 90%, and the miniature earth pressure gauge 2 of XY-TY02A resistance-type for needing to remove damage is reinstalled;For Line near anti-mounting hole destroys, and is wrapped in adhesive waterproof tape 6 and is protected.
(5) construction part for determining miniature steel pipe pile 1 on construction ground, drills out diameter 180mm using down-the-hole hole creating technology Hole, aperture be slightly larger than miniature steel pipe pile 1 diameter, for keep hole wall smooth as far as possible with guarantee decentralization miniature steel pipe pile 1 do not damage The miniature earth pressure gauge 2 of XY-TY02A resistance-type, drilling rod is twitched several times so as to borehole cleaning up and down when construction;XY-TY02A electricity will be installed The miniature steel pipe pile 1 of the miniature earth pressure gauge 2 of resistive is put into the hole being drilled, and is slowly sent to the designed elevation of miniature steel pipe pile 1, It is noted that the miniature earth pressure gauge 2 of protection XY-TY02A resistance-type and sensor metal coating in 1 work progress of miniature steel pipe pile Shell 4;
(6) by Grouting Pipe insertion miniature steel pipe pile 1 bottom, by the cement slurry mixed pass through slip casting machine slowly inject it is miniature In steel-pipe pile 1, the ratio of mud 0.5:1 of cement slurry, 1 slip casting of miniature steel pipe pile is using first down tube post grouting process, miniature steel pipe pile 1 Slurry outlet is vertically arranged according to practical geological condition, sets two every 500mm when passing through soil layer and strong-weathered rockOut Hole is starched, slurry outlet presses quincunx interlaced arrangement;The moment is wanted to pay attention to the pressure gauge in Grouting Pipe during slip casting, it is ensured that grouting pressure Reach 0.5MPa, Grouting Pipe wouldn't be pulled out after slip casting, until cement slurry flows out outside miniature steel pipe pile 1, extracts Grouting Pipe, it is close The end of miniature steel pipe pile 1 is sealed, is pressurizeed 5 minutes, until flowing out outside steel pipe again to cement slurry, Grouting Pipe is extracted, completes note Starch operation;
(7) the miniature earth pressure gauge 2 of XY-TY02A resistance-type, resistance test deformeter 7 and data storage computer 9 are connected, Detect the survival rate of the miniature earth pressure gauge 2 of XY-TY02A resistance-type;
(8) monitoring 1 time before cement slurry initial set, in entire Support of Foundation Pit Excavation construction period, observation 1 time daily, foundation pit After the completion of excavation supporting, every 3-7d is observed 1 time.

Claims (2)

1. a kind of miniature steel pipe stake body soil pressure sensor installation aiding device, it is characterised in that main structure includes miniature steel pipe Stake, the miniature earth pressure gauge of XY-TY02A resistance-type, transmission line, sensor metal coating shell, anchoring adhesive, adhesive waterproof tape, resistance It tests deformeter, sensor mounting hole, data and stores computer, weld seam, crown beam, waist rail;Miniature steel pipe pile using diameter 127mm, Thickness 5mm, 12.7 meters of length of seamless steel pipe are equipped with crown beam at the top of miniature steel pipe pile, are evenly distributed with waist on lateral surface Beam, sensor mounting hole are the diameter 5mm circular holes formed in a manner of gas flame cuttiug in miniature steel pipe pile, circular hole it is vertical symmetrical Axis is along miniature steel pipe pile vertical non-alignment, the stress of sensor mounting hole cross-section centroid and the miniature earth pressure gauge of XY-TY02A resistance-type Film side centroid is overlapped;Sensor metal coating shell uses the seamless steel pipe identical but different size from miniature steel pipe pile material, Internal diameter 25mm, length 5mm, wall thickness 5mm sensor metal coating shell be arranged in miniature steel pipe pile appearance in a welding manner The position of the miniature earth pressure gauge of XY-TY02A resistance-type is installed in face, and the position of the installation miniature earth pressure gauge of XY-TY02A resistance-type is used Electric polishing machine polishing is simultaneously levelling to miniature steel pipe pile progress arc portion position;The miniature earth pressure gauge of XY-TY02A resistance-type uses bottom surface Outlet method, diameter are 20mm with a thickness of 6.5mm, and range is determined as 5MPa, XY-TY02A resistance-type according to actual requirement of engineering The number of miniature earth pressure gauge is by the way that the stake of miniature steel pipe pile is long and the radical of pile body prestressed anchor determines;XY-TY02A resistance The side alignment sensor mounting hole of bottom surface outlet is packed into sensor mounting hole by the type that declines earth pressure gauge, and passes through anchoring adhesive It is pasted on miniature steel pipe pile, transmission line uses diameter 3mm, the water conservancy project cable with waterproof effect, and adhesive waterproof tape is wrapped in On transmission line near sensor mounting hole, the end of a thread of transmission line is passed through by sensor mounting hole, eventually arrives at miniature steel pipe Stake top portion is simultaneously connected with resistance test deformeter, and resistance test deformeter is connected with data storage computer.
2. a kind of method laid using device as described in claim 1 to miniature steel pipe stake body soil pressure sensor, special Sign is specific embodiment are as follows:
(1) according to the stake of miniature steel pipe pile is long and the radical of pile body prestressed anchor determines the miniature earth pressure gauge of each resistance-type The water conservancy project cable of number and spacing, the miniature earth pressure gauge of XY-TY02A resistance-type is protected by the way of interior cabling;
(2) the miniature earth pressure gauge of XY-TY02A resistance-type miniature steel pipe pile installation before, first connect resistance test deformeter with Data store computer, on the one hand check whether cable fractures, and on the other hand whether examine the miniature soil pressure sensor of resistance-type Failure.
(3) installation site according to the miniature earth pressure gauge of XY-TY02A resistance-type in miniature steel pipe pile, outside miniature steel pipe pile Wall draws position and the size of sensor mounting hole with chalk, in miniature steel pipe pile pore-forming, sensor in a manner of gas flame cuttiug Centroid is overlapped mounting hole cross-section centroid with each force acting on transducer film side as far as possible, after miniature steel pipe pile is cooling, with electronic mill Ray machine polishes to the position of the miniature steel pipe pile outer wall installation miniature earth pressure gauge of XY-TY02A resistance-type, and carries out arc portion and look for It is flat;
(4) in the position of the miniature steel pipe pile outer wall installation miniature earth pressure gauge of XY-TY02A resistance-type, soldered sensor metal is protected Shell 4 is protected, sensor metal coating outer cover length direction is slightly below the miniature earth pressure gauge 2 of XY-TY02A resistance-type;
(5) by the cable of each miniature earth pressure gauge of XY-TY02A resistance-type from the position of miniature steel pipe pile sensor mounting hole The miniature earth pressure gauge of XY-TY02A resistance-type is filled in sensor metal coating shell and is used in combination by the inside for penetrating miniature steel pipe pile Anchoring adhesive is pasted into miniature steel pipe pile, it is ensured that firm pasting, gap are filled with glue, and firm pasting is followed by logical resistance test and answers Become instrument and data store computer, examine the survival rate of the miniature earth pressure gauge of XY-TY02A resistance-type, need it must not lower than 90% The miniature earth pressure gauge of XY-TY02A resistance-type for removing damage is reinstalled;It destroys, twines for the line near anti-mounting hole It is protected with adhesive waterproof tape.
(6) construction part for determining miniature steel pipe pile on construction ground, using borehole cleaning after down-the-hole technique pore-forming, aperture is slightly larger than micro- The diameter of fashioned iron tubular pole;The miniature steel pipe pile for installing the miniature earth pressure gauge of XY-TY02A resistance-type is put into the hole being drilled, It is slowly sent to the designed elevation of stake, it is noted that the protection miniature soil pressure of XY-TY02A resistance-type in miniature steel pipe pile work progress Power meter and sensor metal coating shell;
(7) by the bottom of Grouting Pipe insertion miniature steel pipe pile, the cement slurry mixed slowly is injected into miniature steel pipe by slip casting machine In stake, the ratio of mud 0.5:1 of cement slurry, miniature steel pipe pile slip casting is using first down tube post grouting process, and miniature steel pipe pile is vertically Slurry outlet is set according to practical geological condition, sets two every 500mm when passing through soil layer and strong-weathered rockSlurry outlet, out It starches hole and presses quincunx interlaced arrangement;The moment is wanted to pay attention to the pressure gauge in Grouting Pipe during slip casting, it is ensured that grouting pressure reaches 0.5MPa wouldn't pull out Grouting Pipe after slip casting, until cement slurry flows out outside miniature steel pipe pile, extract Grouting Pipe, seal steel Tube end pressurizes 5 minutes, until flowing out outside steel pipe again to cement slurry, extracts Grouting Pipe, completes slip casting operation;
(8) the miniature earth pressure gauge of XY-TY02A resistance-type, resistance test deformeter and data storage computer are connected, detects XY- The survival rate of the miniature earth pressure gauge of TY02A resistance-type;
(9) monitoring 1 time before cement slurry initial set, in entire Support of Foundation Pit Excavation construction period, observation 1 time daily.Excavation of foundation pit After the completion of supporting, every 3-7d is observed 1 time, and miniature steel pipe pile body soil pressure is calculated using formula P=μ ε × K, and wherein P is pressure Force value, unit kPa;μ ε is dependent variable;K is calibration coefficient.
CN201910697634.XA 2019-07-31 2019-07-31 A kind of miniature steel pipe stake body soil pressure sensor installation aiding device and method Pending CN110468889A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201910697634.XA CN110468889A (en) 2019-07-31 2019-07-31 A kind of miniature steel pipe stake body soil pressure sensor installation aiding device and method
PCT/CN2020/103599 WO2021017984A1 (en) 2019-07-31 2020-07-22 Soil pressure and displacement monitoring system and method for miniature steel pipe pile body
US17/581,912 US20220145574A1 (en) 2019-07-31 2022-01-22 System and method for monitoring earth pressure and displacement of miniature steel pipe pile body

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Application Number Priority Date Filing Date Title
CN201910697634.XA CN110468889A (en) 2019-07-31 2019-07-31 A kind of miniature steel pipe stake body soil pressure sensor installation aiding device and method

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WO2021017984A1 (en) * 2019-07-31 2021-02-04 青岛理工大学 Soil pressure and displacement monitoring system and method for miniature steel pipe pile body

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021017984A1 (en) * 2019-07-31 2021-02-04 青岛理工大学 Soil pressure and displacement monitoring system and method for miniature steel pipe pile body
CN111794246A (en) * 2020-07-21 2020-10-20 安徽省交通建设股份有限公司 Excavation supporting system for foundation pit of upper-penetrating subway tunnel and construction method

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