CN103822875A - Device and method for testing energy pile-soil contact surface frictional force - Google Patents

Device and method for testing energy pile-soil contact surface frictional force Download PDF

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Publication number
CN103822875A
CN103822875A CN201410077507.7A CN201410077507A CN103822875A CN 103822875 A CN103822875 A CN 103822875A CN 201410077507 A CN201410077507 A CN 201410077507A CN 103822875 A CN103822875 A CN 103822875A
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pile
sample
soil
concrete
temperature
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CN201410077507.7A
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Chinese (zh)
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CN103822875B (en
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孔纲强
郑礼昆
孙广超
孙学谨
李春红
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河海大学
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Abstract

The invention discloses a device and a method for testing the energy pile-soil contact surface frictional force. A heat transfer pipe pre-buried in a concrete pile sample in the device is connected to a pile sample temperature cycle control system, the top end of the concrete pile sample is connected to a loading system through a dowel bar, a stress sensor and a displacement sensor are arranged on the dowel bar, a water inlet and a water outlet of a seal pressure chamber are connected to a pressure chamber temperature cycle control system, and both the pile sample temperature cycle control system and the pressure chamber temperature cycle control system comprise seal containers, water suction pumps and thermometers. The method is characterized in that the pile temperature and the soil temperature are controlled in design values through the temperature cycle control systems, and the energy pile-soil contact surface frictional force can be measured through the stress sensor and the displacement sensor. The device and the method have the advantages that the structure is simple, the operability is strong, the control is simple, and the realization is easy.

Description

A kind of energy stake Pile-soil contact face friction testing device and method of testing
Technical field
The invention belongs to civil engineering work earthwork test Instrument technical field, particularly a kind of energy stake Pile-soil contact face friction testing device and method of testing.
Background technology
Pile foundation is widely used in the technical field of civil engineering such as construction work; Earth source heat pump is a kind of highly effective energy-conserving environmental-protecting type air-conditioning system of utilizing underground shallow layer geothermal energy resources can heat supply can freeze again.Along with progressively applying of ground source heat pump technology, the energy stake technology that considers the vertical pipe laying technological merit of pile foundation and earth source heat pump is applied gradually.But the research for the thermodynamic behaviour of energy stake is relatively less; Especially under cold cycling, the friction force characteristic between pile foundation and surrounding soil cannot determine, Pile Soil friction force that cannot be definite directly affects the calculating of pile foundation total bearing capacity; Thereby cause bearing capacity and settlement issues that geotechnical engineer dare not design energy stake, affect the wide popularization and application of energy stake technology.Therefore, research and develop a set of measurement mechanism and the method for testing thereof that can measure energy stake Pile Soil friction force, become the extremely urgent task of pendulum in face of geotechnical engineer.
Before the present invention, Chinese patent literature CN102628767A discloses a kind of proving installation and method of testing thereof of the Pile-soil contact face friction force based on conventional earthwork triaxial apparatus; In conventional earthwork triaxial apparatus pressure chamber, arrange concrete sample and hollow cylinder soil sample, measure Pile-soil contact face friction force value by compression test.This technical method, tests and compares with simple shear apparatus with conventional direct shear apparatus, can consider the operating modes such as soil sample draining around and not draining, axial deformation and the cubic deformation that can measure the soil body simultaneously; But this test unit cannot be considered the impact of the factor such as pile body specimen temperature and surrounding soil test temperature, and on normal triaxial instrument, prepare hollow cylinder soil body sample and arrange relatively difficulty of solid concrete sample.Therefore,, on the basis of prior art device, retrofit testing device, formulation method of testing, be the good approach that realizes energy stake Pile Soil friction measurement; Also be the important leverage that ensures the scientific and reasonable design of energy stake.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, undergo technological transformation for existing geotechnological instrument and equipment, propose a kind of energy stake Pile-soil contact face friction testing device and method of testing.
The technical scheme that technical solution problem of the present invention adopts is:
A kind of energy stake Pile-soil contact face friction testing device, comprise and be placed in the indoor concrete-pile sample of sealing load and hollow cylinder soil body sample, described concrete-pile specimen finish is consistent with hollow cylinder soil body sample internal diameter, the inwall of the outer wall of described concrete-pile sample and hollow cylinder soil body sample fits tightly, in described concrete-pile sample, be embedded with heat-transfer pipe, described heat-transfer pipe is connected to a specimen temperature cyclic control system, and described stake specimen temperature cyclic control system is made up of the first closed container, the first suction pump and the first thermometer; The top of described concrete-pile sample is connected to loading system by transmission rod, is provided with strain gauge and displacement transducer on described transmission rod; The water inlet of described sealing load chamber and water delivering orifice are all connected to pressure chamber's temperature cycles control system, thermometer and hole are installed on described sealing load chamber and press meter, described pressure chamber temperature cycles control system is made up of the second closed container, the second suction pump and the second thermometer.
Concrete-pile sample is preferably prefabricated cylindrical concrete block, and concrete strength is C20-C60, and prefabricated concrete-pile specimen finish is 8-12cm, highly for 55-60cm, and its concrete-pile sample lateral surface roughness is set according to actual needs; The inner pre-buried heat-transfer pipe of prefabricated cylindrical concrete block.
Heat-transfer pipe is preferably polyethylene pipe, and internal diameter is that 1.0-1.5cm, wall thickness are that 0.3-0.5cm, length are 150-500cm; Heat-transfer pipe is embedded in concrete-pile sample, and pipe laying form is single U-shaped, dual U-shaped and W shape; Heat-transfer pipe is connected with the stake specimen temperature circulation system, and the first thermometer range is-20 oc to 60 oc.
The preferred internal diameter of hollow cylinder soil body sample is 8-12cm, consistent with concrete-pile specimen finish and fit tightly, and external diameter is 28-32cm, is highly 55-60cm; Can be undisturbed soil, can be also manipulated soil.
Sealing load chamber is preferably the refractory seals cover of steel, and its diameter is 60-80cm, is highly 60-70cm, and on seal closure, meter is pressed in reserved water inlet, water delivering orifice, thermometer and hole; Water inlet is connected with pressure chamber's temperature circulatory system with water delivering orifice, and the second thermometer range is 0 oc to 50 oc.
It is the method for testing of above-mentioned a kind of energy stake Pile-soil contact face friction testing device that the present invention proposes simultaneously, comprises following technical step:
(1) according to engineering actual conditions, according to the cylindrical concrete-pile sample of the prefabricated corresponding roughness of designing requirement; Foot the bill in advance in prefabricated cylindrical concrete-pile sample inside according to designing requirement U-shaped, dual U-shaped or W shape heat-transfer pipe, and by heat-transfer pipe and a stake specimen temperature cyclic control system pre-connection, connect debugging concrete-pile specimen temperature cyclic control system;
(2) concrete-pile sample lower end is placed on base, concrete-pile sample upper end is connected with loading system by transmission rod, and the strain gauge of arranging on transmission rod and displacement transducer can record the load that loading system applies to concrete-pile sample;
(3) on base, concrete-pile sample outside, preparation reinvent hollow cylinder soil body sample or by original hollow cylinder shape soil body sample dress sample to relevant position, and place displacement transducer above permeable stone more than hollow cylinder soil body sample;
(4) according to designing requirement, hollow cylinder soil body sample is carried out saturated, after saturated completing according to testing requirements select draining or not drainage pattern apply confined pressure and make soil solidifying;
(5) hollow cylinder soil body sample is saturated complete after, press meter to be connected with data acquisition system (DAS) accordingly strain gauge, displacement transducer, hole;
(6) water inlet on sealing load chamber is connected with pressure chamber's temperature cycles control system with water delivering orifice, adjust the temperature in pressure chamber by the second temperature reading in the thermometer in pressure chamber and pressure chamber's temperature cycles control system, thereby control the temperature of hollow cylinder soil body sample;
(7) apply confined pressure; Opening pressure room temperature cyclic control system, makes the indoor temperature reading of sealing load reach design load and substantially remain unchanged; Continuous and, open a stake specimen temperature cyclic control system, make concrete-pile specimen temperature reach design load;
(8) in the time that pressure chamber's temperature and concrete-pile specimen temperature are stabilized in design load, hollow cylinder soil body sample is applied to torsional shear, measure strain gauge, displacement transducer, hole simultaneously and press the reading of meter;
(9) in the time that hoop displacement or pore water pressure reach corresponding criterion of failure, stop turning round and cut load and apply, close a sample and pressure chamber's temperature cycles control system, complete one group of energy stake Pile-soil contact face friction testing test;
(10), according to the first thermometer of relevant position and the second thermometer, determine respectively the temperature of the soil body and pile body; Determine Pile Soil relative shift according to the displacement transducer difference of reading on the displacement transducer on concrete-pile sample top and hollow cylinder soil body sample top; Determine Pile-soil contact face vertical stress by confined pressure size; Determine Pile-soil contact face friction force by the strain gauge on concrete-pile sample top; Can obtain thus, under draining or not drainage situation, energy stake Pile-soil contact face friction force value under vertical uniform load q.
Advantage of the present invention and effect are: by heat-transfer pipe being set in precast concrete pile sample inside, heat-transfer pipe is connected with temperature cycles control system, effectively the temperature of concrete-pile sample is controlled; By being connected of sealing load chamber and pressure chamber's temperature cycles control system, effectively the temperature of hollow cylinder soil body sample is controlled; By the transformation to conventional ring shear apparatus pressure chamber, effectively realize the mensuration problem to energy stake Pile-soil contact face friction force, solve the technical matters that not yet has energy stake Pile-soil contact face frictional force measuring device at present.The present invention is simple in structure, the pressure chamber after improvement, and combined temperature cyclic control system can directly use on existing geotechnological instrument; The method operation steps is simple, workable, is convenient to control, and is easy to realize.
Advantage of the present invention and effect will further describe in embodiment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
In figure: 1 concrete-pile sample, 2 heat-transfer pipes, 3 hollow cylinder soil body samples, 4 sealing load chambers, 5 thermometers, meter is pressed in 6 holes, 7 strain gauges, 8 transmission rods, 9 displacement transducers, 10 bases, 11 permeable stones, 12 filter paper, 13 soil sample drainpipes, 14 sealing load chamber water inlets, 15 sealing load chamber water delivering orifices, 16 specimen temperature cyclic control systems, 17 pressure chamber's temperature cycles control system.
Embodiment
Describe the embodiment of patent of the present invention in detail below in conjunction with accompanying drawing.The protection domain of patent of the present invention is not limited only to the description of present embodiment.
As shown in Figure 1, a kind of energy stake Pile-soil contact face friction testing device, its apparatus structure comprises concrete-pile sample 1, heat-transfer pipe 2, hollow cylinder soil body sample 3, sealing load chamber 4, thermometer 5, strain gauge 7, transmission rod 8, displacement transducer 9, base 10, permeable stone 11, filter paper 12, soil sample drainpipe 13, sealing load chamber water inlet 14, sealing load chamber water delivering orifice 15, stake specimen temperature cyclic control system 16, meter 6 is pressed in pressure chamber's temperature cycles control system 17 and hole.Heat-transfer pipe 2 is embedded in concrete-pile sample 1, and is connected with stake specimen temperature cyclic control system 16; Concrete-pile sample 1 diameter is consistent with hollow cylinder soil body sample 3 internal diameters and fit tightly, concrete-pile sample 1 upper end by transmission rod 8 be connected with loading system, lower end is connected with base 10, and strain gauge 7 and displacement transducer 9 are set on transmission rod 8; Hollow cylinder soil body sample 3 two ends are arranged filter paper 12 and permeable stone 11 successively, be then placed on base 10, and it are saturated to carry out draining by soil sample drainpipe 13; 15 reserved sealing load chamber water inlets 14, sealing load chamber water delivering orifice 15 and thermometer 5 on sealing load chamber, and be connected with pressure chamber's temperature cycles control system 17; Stake specimen temperature cyclic control system 16 is made up of the first closed container, the first suction pump and the first thermometer.Pressure chamber's temperature cycles control system 17 is by being made up of the second closed container, the second suction pump and the second thermometer.
When use, the method for testing of above-mentioned energy stake Pile-soil contact face friction testing device comprises following technical step:
First, according to engineering actual conditions, according to the prefabricated cylindrical concrete-pile sample 1 of designing requirement, concrete-pile sample is prefabricated cylindrical concrete block, concrete strength is that C20-C60(the present embodiment is C25), prefabricated concrete-pile specimen finish is that 8-12cm(the present embodiment is 10cm), highly for 55-60cm(the present embodiment is 55cm), its concrete-pile sample lateral surface roughness is set (the present embodiment is uneven surface) according to actual needs; Foot the bill in advance in prefabricated cylindrical concrete-pile sample 1 inside according to designing requirement U-shaped, dual U-shaped or W shape heat-transfer pipe 2(the present embodiment is single U-shaped), heat-transfer pipe is polyethylene pipe, and internal diameter is that 1.0-1.5cm(the present embodiment is 1.0cm), wall thickness is that 0.3-0.5cm(the present embodiment is 0.3cm), length is that 150-500cm(the present embodiment is 150cm); And by heat-transfer pipe 2 and stake specimen temperature cyclic control system 16 pre-connections, connect debugging concrete-pile specimen temperature cyclic control system;
Secondly, concrete-pile sample 1 lower end is placed on base 10, concrete-pile sample 1 upper end is connected with loading system by transmission rod 8, and strain gauge 7 and the displacement transducer 9 on transmission rod 8, arranged can record the load that loading system applies to concrete-pile sample 1; On base 10, concrete-pile sample 1 outside, preparation is reinvented hollow cylinder soil body sample 3 or original hollow cylinder shape soil body sample is filled to sample 3 to relevant position, the internal diameter of hollow cylinder soil body sample 3 is that 8-12cm(the present embodiment is 10cm), consistent with concrete-pile specimen finish and fit tightly, external diameter is that 28-32cm(the present embodiment is 30cm), highly for 55-60cm(the present embodiment is 55cm); And above more than 3 permeable stones 11, place displacement transducer 9 at hollow cylinder soil body sample;
Then, according to designing requirement, hollow cylinder soil body sample 3 is carried out saturated, after saturated completing according to testing requirements select draining or not drainage pattern apply confined pressure and make soil solidifying; After hollow cylinder soil body sample 3 saturated completing, press meter 6 to be connected with corresponding data acquisition system (DAS) in strain gauge 7, displacement transducer 9, hole;
Then, sealing load chamber water inlet 14 on sealing load chamber 4 is connected with pressure chamber's temperature cycles control system 17 with sealing load chamber water delivering orifice 15, adjust the temperature in sealing load chamber 4 by the second temperature reading in the thermometer 5 in sealing load chamber 4 and pressure chamber's temperature cycles control system 17, thereby control the temperature of hollow cylinder soil body sample 3; The seal closure that sealing load chamber 4 is steel, its diameter is that 60-80cm(the present embodiment is 60cm), highly for 60-70cm(the present embodiment is 60cm), on seal closure, meter is pressed in reserved water inlet, water delivering orifice, thermometer and hole; Water inlet is connected with pressure chamber's temperature circulatory system with water delivering orifice, and the second thermometer range is 0 oc to 50 oc;
Follow again, apply confined pressure; Opening pressure room temperature cyclic control system 17, makes thermometer 5 readings in sealing load chamber 4 reach design load and substantially remain unchanged; Continuous and, open a stake specimen temperature cyclic control system 16, make concrete-pile sample 1 temperature (reading from the second thermometer) reach design load; When sealing load chamber 4 temperature and 1 temperature one timing of concrete-pile sample, apply step by step xial feed in concrete-pile sample 1 upper end, measure the reading of strain gauge 7, displacement transducer 9, hole pressure meter 6 simultaneously; In the time that axial displacement or pore water pressure reach corresponding criterion of failure, stop xial feed and apply, close a specimen temperature cyclic control system 16 and pressure chamber's temperature cycles control system 17, complete one group of energy stake Pile-soil contact face friction testing test;
Finally, according to the first thermometer of relevant position and the second thermometer, determine respectively the temperature of the soil body and pile body; Determine Pile Soil relative shift according to displacement transducer 9 difference of readings on concrete-pile sample 1 top and hollow cylinder soil body sample 3 tops; Determine Pile-soil contact face vertical stress by confined pressure size; Strain gauge 7 by concrete-pile sample 1 top is determined Pile-soil contact face friction force; Can obtain thus, under draining or not drainage situation, energy stake Pile-soil contact face friction force value under pile driving process and vertical uniform load q.

Claims (2)

1. an energy stake Pile-soil contact face friction testing device, comprise and be placed in the indoor concrete-pile sample of sealing load and hollow cylinder soil body sample, described concrete-pile specimen finish is consistent with hollow cylinder soil body sample internal diameter, the inwall of the outer wall of described concrete-pile sample and hollow cylinder soil body sample fits tightly, it is characterized in that: in described concrete-pile sample, be embedded with heat-transfer pipe, described heat-transfer pipe is connected to a specimen temperature cyclic control system, described stake specimen temperature cyclic control system is by the first closed container, the first suction pump and the first thermometer composition, the top of described concrete-pile sample is connected to loading system by transmission rod, is provided with strain gauge and displacement transducer on described transmission rod, the water inlet of described sealing load chamber and water delivering orifice are all connected to pressure chamber's temperature cycles control system, thermometer and hole are installed on described sealing load chamber and press meter, described pressure chamber temperature cycles control system is made up of the second closed container, the second suction pump and the second thermometer.
2. the method for testing of a kind of energy stake Pile-soil contact face friction testing device according to claim 1, its technical step comprises:
(1) according to engineering actual conditions, according to the cylindrical concrete-pile sample of the prefabricated corresponding roughness of designing requirement; Foot the bill in advance in prefabricated cylindrical concrete-pile sample inside according to designing requirement U-shaped, dual U-shaped or W shape heat-transfer pipe, and by heat-transfer pipe and a stake specimen temperature cyclic control system pre-connection, connect debugging concrete-pile specimen temperature cyclic control system;
(2) concrete-pile sample lower end is placed on base, concrete-pile sample upper end is connected with loading system by transmission rod, and the strain gauge of arranging on transmission rod and displacement transducer can record the load that loading system applies to concrete-pile sample;
(3) on base, concrete-pile sample outside, preparation reinvent hollow cylinder soil body sample or by original hollow cylinder shape soil body sample dress sample to relevant position, and place displacement transducer above permeable stone more than hollow cylinder soil body sample;
(4) according to designing requirement, hollow cylinder soil body sample is carried out saturated, after saturated completing according to testing requirements select draining or not drainage pattern apply confined pressure and make soil solidifying;
(5) hollow cylinder soil body sample is saturated complete after, press meter to be connected with data acquisition system (DAS) accordingly strain gauge, displacement transducer, hole;
(6) water inlet on sealing load chamber is connected with pressure chamber's temperature cycles control system with water delivering orifice, adjust the temperature in pressure chamber by the second temperature reading in the thermometer in pressure chamber and pressure chamber's temperature cycles control system, thereby control the temperature of hollow cylinder soil body sample;
(7) apply confined pressure; Opening pressure room temperature cyclic control system, makes the indoor temperature reading of sealing load reach design load and substantially remain unchanged; Continuous and, open a stake specimen temperature cyclic control system, make concrete-pile specimen temperature reach design load;
(8) in the time that pressure chamber's temperature and concrete-pile specimen temperature are stabilized in design load, hollow cylinder soil body sample is applied to torsional shear, measure strain gauge, displacement transducer, hole simultaneously and press the reading of meter;
(9) in the time that hoop displacement or pore water pressure reach corresponding criterion of failure, stop turning round and cut load and apply, close a sample and pressure chamber's temperature cycles control system, complete one group of energy stake Pile-soil contact face friction testing test;
(10), according to the first thermometer of relevant position and the second thermometer, determine respectively the temperature of the soil body and pile body; Determine Pile Soil relative shift according to the displacement transducer difference of reading on the displacement transducer on concrete-pile sample top and hollow cylinder soil body sample top; Determine Pile-soil contact face vertical stress by confined pressure size; Determine Pile-soil contact face friction force by the strain gauge on concrete-pile sample top; Can obtain thus, under draining or not drainage situation, energy stake Pile-soil contact face friction force value under vertical uniform load q.
CN201410077507.7A 2014-03-05 2014-03-05 Device and method for testing energy pile-soil contact surface frictional force CN103822875B (en)

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Cited By (15)

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CN104074210A (en) * 2014-07-15 2014-10-01 中铁第一勘察设计院集团有限公司 Pile foundation side friction indoor testing device and testing method thereof
CN104111135A (en) * 2014-07-23 2014-10-22 杨涅 Soil-around-pile side friction detecting device detecting device and soil-around-pile friction detecting method
CN104165797A (en) * 2014-08-29 2014-11-26 上海交通大学 Pile-soil interface three-axis model testing device under condition of seepage
CN105699289A (en) * 2016-04-26 2016-06-22 河海大学 Testing device for internal friction force of PCC piles and use method thereof
CN105716970A (en) * 2016-04-26 2016-06-29 河海大学 Visual test device for damaged form of pile-soil contact surface of specially-shaped pile and use method
CN105910920A (en) * 2016-06-22 2016-08-31 青岛理工大学 Temperature control pile-soil interface direct shear test device
CN106644695A (en) * 2017-01-05 2017-05-10 上海理工大学 Device and method for testing carrying capacity of uplift piles at different temperatures
CN106706442A (en) * 2017-03-05 2017-05-24 南京大学 Testing device and testing method for testing normal contact stress of pile-soil interface under variable temperature condition
CN104713791B (en) * 2015-04-02 2017-10-17 西安长庆科技工程有限责任公司 A kind of torsional shear strength of soil body cylinder sample and Deformation Observation experimental rig
CN107796755A (en) * 2017-08-14 2018-03-13 浙江大学宁波理工学院 A kind of temperature-changeable pile-soil interaction large direct shear apparatus
CN108692834A (en) * 2018-06-11 2018-10-23 河海大学 One kind is for verifying the lower concrete stress experimental rig of internal loading effect
CN109187204A (en) * 2018-08-03 2019-01-11 广西大学 A kind of experimental rig for simulating pile-soil interaction when vertically recycling load-bearing
CN109540690A (en) * 2018-11-13 2019-03-29 河海大学 A kind of pile-soil interface mechanical property testing device based on temperature control triaxial apparatus
CN109883837A (en) * 2019-03-22 2019-06-14 温州大学 A kind of the Model Pile tester and its test method of controllable soil temperature
CN110387914A (en) * 2019-08-15 2019-10-29 北京中岩大地科技股份有限公司 A kind of test method of stiff composite pile bearing capacity circumferential direction test

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CN102628767A (en) * 2012-03-23 2012-08-08 河海大学 Device and method for testing mechanical properties of pile-soil contact surface
CN103389249A (en) * 2013-07-18 2013-11-13 河海大学 Device and method for clay core wall hydraulic fracturing experiments
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CN102359933A (en) * 2011-09-25 2012-02-22 吉林大学 System and method for testing all-weather tyre tread-road surface frictional characteristic
CN102628767A (en) * 2012-03-23 2012-08-08 河海大学 Device and method for testing mechanical properties of pile-soil contact surface
CN103389249A (en) * 2013-07-18 2013-11-13 河海大学 Device and method for clay core wall hydraulic fracturing experiments
CN103485232A (en) * 2013-09-26 2014-01-01 句容市植保植检站 Paper prepared by utilizing water hyacinth and preparation method of paper

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Publication number Priority date Publication date Assignee Title
CN104074210A (en) * 2014-07-15 2014-10-01 中铁第一勘察设计院集团有限公司 Pile foundation side friction indoor testing device and testing method thereof
CN104074210B (en) * 2014-07-15 2016-06-01 中铁第一勘察设计院集团有限公司 Pile foundation side friction shop experiment device and test method thereof
CN104111135A (en) * 2014-07-23 2014-10-22 杨涅 Soil-around-pile side friction detecting device detecting device and soil-around-pile friction detecting method
CN104165797A (en) * 2014-08-29 2014-11-26 上海交通大学 Pile-soil interface three-axis model testing device under condition of seepage
CN104713791B (en) * 2015-04-02 2017-10-17 西安长庆科技工程有限责任公司 A kind of torsional shear strength of soil body cylinder sample and Deformation Observation experimental rig
CN105699289A (en) * 2016-04-26 2016-06-22 河海大学 Testing device for internal friction force of PCC piles and use method thereof
CN105716970B (en) * 2016-04-26 2018-10-09 河海大学 Shaped pile Pile-soil contact face failure mode visual test device and application method
CN105716970A (en) * 2016-04-26 2016-06-29 河海大学 Visual test device for damaged form of pile-soil contact surface of specially-shaped pile and use method
CN105910920A (en) * 2016-06-22 2016-08-31 青岛理工大学 Temperature control pile-soil interface direct shear test device
CN106644695A (en) * 2017-01-05 2017-05-10 上海理工大学 Device and method for testing carrying capacity of uplift piles at different temperatures
CN106706442A (en) * 2017-03-05 2017-05-24 南京大学 Testing device and testing method for testing normal contact stress of pile-soil interface under variable temperature condition
CN107796755A (en) * 2017-08-14 2018-03-13 浙江大学宁波理工学院 A kind of temperature-changeable pile-soil interaction large direct shear apparatus
CN108692834A (en) * 2018-06-11 2018-10-23 河海大学 One kind is for verifying the lower concrete stress experimental rig of internal loading effect
CN109187204A (en) * 2018-08-03 2019-01-11 广西大学 A kind of experimental rig for simulating pile-soil interaction when vertically recycling load-bearing
CN109187204B (en) * 2018-08-03 2020-12-08 广西大学 Test device for simulating pile-soil interaction during vertical cyclic loading
CN109540690A (en) * 2018-11-13 2019-03-29 河海大学 A kind of pile-soil interface mechanical property testing device based on temperature control triaxial apparatus
CN109883837A (en) * 2019-03-22 2019-06-14 温州大学 A kind of the Model Pile tester and its test method of controllable soil temperature
CN110387914A (en) * 2019-08-15 2019-10-29 北京中岩大地科技股份有限公司 A kind of test method of stiff composite pile bearing capacity circumferential direction test

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