CN105698996A - Shearing strength testing device for pile-soil interface - Google Patents
Shearing strength testing device for pile-soil interface Download PDFInfo
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- CN105698996A CN105698996A CN201610205569.0A CN201610205569A CN105698996A CN 105698996 A CN105698996 A CN 105698996A CN 201610205569 A CN201610205569 A CN 201610205569A CN 105698996 A CN105698996 A CN 105698996A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a shearing strength testing device for a pile-soil interface. The body structure includes a rack, an upper shearing box, a lower shearing box, a roller shaft, a hydraulic pressure control device, a horizontal jack, a vertical jack, a counter-force board, a top board, a first force-measuring steel rod, a second force-measuring steel rod, a force sensor and a force display control instrument. Compared with the prior art, a problem that inaccurate testing of the shearing force of the pile-soil interface can be solved well. The force sensor can be connected with the force measuring steel rods simply, the operability is high and the value change of the shearing force of the pile-coil interface can be tested timely. The shearing strength testing technique provided by the invention provides an effective testing means for studying mechanical characteristics of a pile and stress transmission mechanism.
Description
Technical field
The invention belongs to pile foundation engineering technical field, relate to a Soil Interface mechanical property testing device, specifically a kind of stake Soil Interface shear stress test device。
Background technology
At present both at home and abroad less for the research of stake Soil Interface mechanical property, on-the-spot test is to install testing element in pile body side, the side-friction force of actual test soil around pile, but this method of testing time length, costly, test result inaccurate；Laboratory test is but without forming standard test method, testing equipment is imperfection also, often continue to use direct shear test principle of device, the big direct shear apparatus adopted is typically all by upper and lower shear box, vertical force loading system, horizontal force loading system, provides the device of counter-force, vertical displacement test system and horizontal displacement test system, the test of stake Soil Interface shear stress is calculated by horizontal displacement, the accurate test of the shear stress of a Soil Interface cannot be ensured, also cannot obtain the change constantly of value of shearing。Therefore, develop a kind of accurate stake Soil Interface test device and method, the change of shear stress is measured constantly in the stake soil phase is to sliding process, the research of pile for prestressed pipe penetrating resistance is significant, it is also possible to promote pile for prestressed pipe hammering mechanism research theory better。
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, a kind of stake Soil Interface shear stress test device is proposed, the change of test pile Soil Interface shear stress constantly, test in device at direct shear apparatus, by dynamometry steel pole, force cell is installed, show that controller accurately reads value of shearing by force value。
To achieve these goals, one stake Soil Interface shear stress of the present invention test device, agent structure includes frame, upper shear box, down cut box, roller bearing, hydraulic control device, level jack, vertical jack, reaction plate, top board, the first dynamometry steel pole, the second dynamometry steel pole, force transducer, power display controller composition；It is characterized in that: level jack and vertical jack are fixedly mounted in frame, are connected with hydraulic control device；Level jack and down cut box one side contacts, it is provided that horizontal power；Vertical jack and upper shear box top plate contact, it is provided that vertical pressure；On the left of first dynamometry steel pole, side and reaction plate two ends nut are fixed, and opposite side is connected with screwed hole on the left of force transducer；On the right side of second dynamometry steel pole, side and upper shear box two ends nut are fixed, and opposite side is connected with screwed hole on the right side of force transducer；With power, force transducer shows that controller is connected, gather data。
It is 10mm, the degree of depth is the screwed hole of 20mm that force transducer two ends of the present invention have diameter；First dynamometry steel pole diameter is 20mm, and length is 250mm, and wherein there is tooth in left side from being the screw thread of 80mm for 1mm, length, and right side has tooth to be the screw thread of 15mm from being 10mm, length for 1mm, diameter；Second dynamometry steel pole diameter is 20mm, and length is 150mm, and wherein there is tooth on right side from being the screw thread of 80mm for 1mm, length, and side, left side has tooth to be the screw thread of 15mm from being 10mm, length for 1mm, diameter；Reaction plate thickness is 10mm, has the screwed hole that diameter is 20mm；The screwed hole that diameter is 20mm is had on the left of upper shear box。
It is an advantage of the current invention that: relative to prior art, solve a difficult problem that Soil Interface shear stress cannot accurately be tested well, force transducer is connected simply with dynamometry steel pole, workable, can the change of test pile Soil Interface value of shearing constantly, this Soil Interface shear stress measuring technology is the mechanical characteristic of research stake and stress transfer mechanism provides effective research technique。
Accompanying drawing explanation
Fig. 1 is the agent structure principle schematic of the present invention；
Fig. 2 is for the present invention relates to force transducer and dynamometry steel pole structure principle schematic。
1, frame；2, upper shear box；3, down cut box；4, roller bearing；5, hydraulic control device；6, level jack；7, vertical jack；8, reaction plate；9, top board；10, the first dynamometry steel pole；11, the second dynamometry steel pole；12, force transducer；13, power display controller。
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in the figure, a kind of stake Soil Interface shear stress test device, agent structure includes frame 1, upper shear box 2, down cut box 3, roller bearing 4, hydraulic control device 5, level jack 6, vertical jack 7, reaction plate 8, top board the 9, first dynamometry steel pole the 10, second dynamometry steel pole 11, force transducer 12, power display controller 13 form；It is characterized in that: level jack 6 and vertical jack 7 are fixedly mounted in frame 1, are connected with hydraulic control device 5；Level jack 6 and down cut box 3 one side contacts, it is provided that horizontal power；Vertical jack 7 and upper shear box 2 top plate contact, it is provided that vertical pressure；On the left of first dynamometry steel pole 10, side and reaction plate 8 two ends nut are fixed, and opposite side is connected with screwed hole on the left of force transducer 12；On the right side of second dynamometry steel pole 10, side and upper shear box 2 two ends nut are fixed, and opposite side is connected with screwed hole on the right side of force transducer 12；With power, force transducer 12 shows that controller 13 is connected, gather data。
It is 10mm, the degree of depth is the screwed hole of 20mm that force transducer 12 two ends of the present invention have diameter；First dynamometry steel pole 10 diameter is 20mm, and length is 250mm, and wherein there is tooth in left side from being the screw thread of 80mm for 1mm, length, and right side has tooth to be the screw thread of 15mm from being 10mm, length for 1mm, diameter；Second dynamometry steel pole 11 diameter is 20mm, and length is 150mm, and wherein there is tooth on right side from being the screw thread of 80mm for 1mm, length, and side, left side has tooth to be the screw thread of 15mm from being 10mm, length for 1mm, diameter；Reaction plate 8 thickness is 10mm, has the screwed hole that diameter is 20mm；The screwed hole that diameter is 20mm is had on the left of upper shear box 2。
Claims (2)
1. a stake Soil Interface shear stress test device, agent structure includes frame, upper shear box, down cut box, roller bearing, hydraulic control device, level jack, vertical jack, reaction plate, top board, the first dynamometry steel pole, the second dynamometry steel pole, force transducer, power display controller composition；It is characterized in that: level jack and vertical jack are fixedly mounted in frame, are connected with hydraulic control device；Level jack and down cut box one side contacts, it is provided that horizontal power；Vertical jack and upper shear box top plate contact, it is provided that vertical pressure；On the left of first dynamometry steel pole, side and reaction plate two ends nut are fixed, and opposite side is connected with screwed hole on the left of force transducer；On the right side of second dynamometry steel pole, side and upper shear box two ends nut are fixed, and opposite side is connected with screwed hole on the right side of force transducer；With power, force transducer shows that controller is connected, gather data。
2. stake Soil Interface shear stress test device as claimed in claim 1 a kind of, it is characterised in that it be 10mm, the degree of depth is the screwed hole of 20mm that described force transducer two ends have diameter；First dynamometry steel pole diameter is 20mm, and length is 250mm, and wherein there is tooth in left side from being the screw thread of 80mm for 1mm, length, and right side has tooth to be the screw thread of 15mm from being 10mm, length for 1mm, diameter；Second dynamometry steel pole diameter is 20mm, and length is 150mm, and wherein there is tooth on right side from being the screw thread of 80mm for 1mm, length, and side, left side has tooth to be the screw thread of 15mm from being 10mm, length for 1mm, diameter；Reaction plate thickness is 10mm, has the screwed hole that diameter is 20mm；The screwed hole that diameter is 20mm is had on the left of upper shear box。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205569.0A CN105698996A (en) | 2016-04-05 | 2016-04-05 | Shearing strength testing device for pile-soil interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205569.0A CN105698996A (en) | 2016-04-05 | 2016-04-05 | Shearing strength testing device for pile-soil interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105698996A true CN105698996A (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610205569.0A Pending CN105698996A (en) | 2016-04-05 | 2016-04-05 | Shearing strength testing device for pile-soil interface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110108576A (en) * | 2019-04-19 | 2019-08-09 | 淮阴工学院 | Screw model stake and ground contact surface shear strength index determining device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373174A (en) * | 2008-07-16 | 2009-02-25 | 中国科学院武汉岩土力学研究所 | Direct shear apparatus capable of directly measuring interface friction force |
| CN101509868A (en) * | 2009-02-18 | 2009-08-19 | 西北农林科技大学 | Method for testing interface shear strength of sample bonded by sealant and bonded substrate |
| JP5002827B2 (en) * | 2007-03-23 | 2012-08-15 | 中国電力株式会社 | Shear testing device for rock discontinuities |
| CN203191265U (en) * | 2013-03-25 | 2013-09-11 | 中国有色金属工业昆明勘察设计研究院 | Device applicable to indoor middle-type shear test |
| CN205620059U (en) * | 2016-04-05 | 2016-10-05 | 王永洪 | Pile - soil interface cuts stress test device |
-
2016
- 2016-04-05 CN CN201610205569.0A patent/CN105698996A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5002827B2 (en) * | 2007-03-23 | 2012-08-15 | 中国電力株式会社 | Shear testing device for rock discontinuities |
| CN101373174A (en) * | 2008-07-16 | 2009-02-25 | 中国科学院武汉岩土力学研究所 | Direct shear apparatus capable of directly measuring interface friction force |
| CN101509868A (en) * | 2009-02-18 | 2009-08-19 | 西北农林科技大学 | Method for testing interface shear strength of sample bonded by sealant and bonded substrate |
| CN203191265U (en) * | 2013-03-25 | 2013-09-11 | 中国有色金属工业昆明勘察设计研究院 | Device applicable to indoor middle-type shear test |
| CN205620059U (en) * | 2016-04-05 | 2016-10-05 | 王永洪 | Pile - soil interface cuts stress test device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110108576A (en) * | 2019-04-19 | 2019-08-09 | 淮阴工学院 | Screw model stake and ground contact surface shear strength index determining device |
| CN110108576B (en) * | 2019-04-19 | 2021-08-17 | 淮阴工学院 | Screw rod model pile and rock-soil contact surface shear strength index measuring device |
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Application publication date: 20160622 |
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