CN201671118U - Prestressed concrete tubular pile strain tester - Google Patents
Prestressed concrete tubular pile strain tester Download PDFInfo
- Publication number
- CN201671118U CN201671118U CN2010202061153U CN201020206115U CN201671118U CN 201671118 U CN201671118 U CN 201671118U CN 2010202061153 U CN2010202061153 U CN 2010202061153U CN 201020206115 U CN201020206115 U CN 201020206115U CN 201671118 U CN201671118 U CN 201671118U
- Authority
- CN
- China
- Prior art keywords
- prestressed concrete
- cylinder
- strain
- tentacle
- pipe pile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a prestressed concrete tubular pile strain tester. The tester comprises an air cylinder and movable tentacles, the air cylinder can be inserted into a prestressed concrete tubular pile to be tested, and the movable tentacles are extended out of the wall of the air cylinder; an air bag is arranged in a metal shell to form the air cylinder, and is provided with a charging tube which is extended out of the metal shell; the movable tentacles are circumferentially and evenly distributed in an upper row and a lower row along the axial direction of the air cylinder, the inner ends of the movable tentacles are contacted with the air bag, and the outer ends of the movable tentacles are sensing ends, in which strain gauge are arranged and which are contacted with the inner wall of the prestressed concrete tubular pile. In the process of testing, the readings of the strain sheets are read, and the strain capacity of the inner wall of the pile is then calculated. The tester can be repetitively used.
Description
Technical field
The utility model relates to a kind of prestressed concrete pipe pile device for measurement of strain of field of civil engineering.
Background technology
Prestressed concrete pipe pile is owing to its quick construction, good economy performance, stressedly rationally be widely used in the pile foundation engineering, in the pile foundation construction process and the stake of construction after finishing distribute along vertical axis power and become the object of geotechnical engineering circle experts and scholars broad research.
The method that is widely used in the axially loaded measure of spread at present is that the method for utilizing the mensuration axial strain to calculate axial stress is then carried out, and the mensuration of axial strain just becomes the committed step of test, many experts and scholars have adopted to be provided with in the prestressed concrete pipe pile hollow and have posted the reinforcing cage of foil gauge and water real concrete method, the concrete of inner cast and reinforcing bar and stake distortion simultaneously, the strain of the foil gauge reflection strain of stake just.This method exists significantly not enough, and at first, pile for prestressed pipe makes it become real core stake after real concrete is watered in the centre, must change the mechanical characteristic of pile tube; Secondly, the inner fluid concrete of pile tube is of low quality, and after the moulding of original pile tube, the after-pouring concrete forms natural interface with the stake inwall, is difficult to form frictional force effectively, adds that the deadweight of after-pouring concrete is bigger, forms at the interface easily to break away from; The 3rd, the concrete existence of inner cast improves the modulus of deformation of this section pile tube.Not only have above defective on practicality, and its economy is not good enough, after each the use, a large amount of leads and foil gauge all will forever be embedded in the concrete, can't take out, and cause waste, contaminated environment.
The content of utility model
The purpose of this utility model is the defective at the prior art existence, a kind of prestressed concrete pipe pile device for measurement of strain is provided, this prestressed concrete pipe pile device for measurement of strain no longer is that the job site makes, but overlap determinator by one of factory process, it is specialized to make the pile tube axial strain measure.For achieving the above object, design of the present utility model is: this device mainly is made up of cylinder, tentacle two big core components (as Fig. 1), by being used with inflator pump and foil gauge reading analyzer, can measure the axial strain of prestressed concrete pipe pile.This device cylinder metal shell is made by the light overpressure resistant metal, and inside is provided with inflatable bladders, and air bag is that highly elastic material is made, and its volume is less than the cylinder internal volume; The rigidity tentacle is connected with gasbag ektexine, and stretches out cylinder outer (as Fig. 2) by the box out of cylinder metal shell.Totally eight of rigidity tentacles, two-layer about being divided into, four every layer evenly stretch to four direction.Tentacle is made by the high-strength light metal tube of two joint sockets, a thicker joint (below become A joint) joins with air bag, with the air bag connecting part rubber pad (as Fig. 3) of expansion is set, in case concentrating, stress makes balloon rupture, a thinner joint (below become B joint) connects the strain induction end, the strain induction end contacts with stake, use dowel fixes (as Fig. 4) between the two joint sleeve pipes, make the lap length of two joint sleeve pipes to change by regulating the different length-adjustment holes of pin insertion, realize the own change in length of tentacle (as Fig. 4) thus, be used to satisfy different pile tube internal diameters.Before the airbag aeration, because its volume is less than the metal shell internal volume, so a tentacle part retracts in the cylinder, this be can put it into stake hollow in, when air bag by after the inflator pump inflation, volume expansion, promote tentacle and stretch out fully, the metal cylinder baffle has limited the increase of air bag volume then, and the air bag internal pressure improves rapidly, make coupled tentacle rigidity stretch, tentacle strain induction end closely contacts with stake inwall high pressure; Detection finishes, and after the air bags, high resiliency is guaranteed the air bag atrophy, drives the tentacle retraction, breaks away from (as Fig. 5) with the stake inwall.
The strain induction end that connects on the tentacle is a cuboid, induction end by the rubber contact and in bury foil gauge and form (as Fig. 4), metal sheeting on the tentacle B joint can be applied to the pressure of tentacle on the rubber contact uniformly, and the rubber contact is evenly closely contacted with the pile tube inwall.The foil gauge of burying underground in the contact, its connection lead is boxed out by tentacle inside and is entered cylinder inner wall, and each tentacle lead gathers back formation bundle conductor then, and bundle conductor is connected (as Fig. 1,2) with external strain sheet readout instrument after stretching out cylinder.The contact surface is provided with horizontal little line, to strengthen the frictional force of contact and stake inwall, be convenient to the two distortion synchronously, when stake generation axial strain, because high frictional force and the modulus of elasticity of rubber contact own are less, with its rubber contact that closely touches same strain take place also, and drive the same distortion of highly sensitive foil gauge generation that is contained in rubber contact top layer in advance, give the foil gauge readout instrument by the foil gauge lead with electrical signal transfer, at this point by calculating the axis strain that to calculate the test point stake.
The method of the pre-buried foil gauge in rubber contact surface is: carve the groove more bigger than foil gauge on the contact surface, after wire bonds pre-buried in foil gauge and the rubber contact finished, adopt glue special to bond in the groove, adopt liquid rubber that groove is filled, after rubber solidifies, carve horizontal little line (as Fig. 6) on rubber contact surface.
According to above-mentioned utility model design, the utility model adopts following technical proposals:
A kind of prestressed concrete pipe pile device for measurement of strain, comprise one can be inserted in the tested prestressed concrete pipe pile cylinder and from the movable tentacle that the cylinder perisporium stretches out, it is characterized in that:
1) described cylinder is to settle an air bag in the metal shell, and this air bag has a gas tube to stretch out from metal shell;
2) two rows are circumferentially uniform up and down along cylinder axis for described movable tentacle, and inner and described air bag contacts, and the outer end is an induction end, built-in foil gauge, and contact with the prestressed concrete pipe pile inwall.
Described movable tentacle is to constitute the telescopic arm of tentacle by two joint socketed pipes, and described metal shell is goed deep in the inner of its outer tube, a rubber pad is housed and contacts with described air bag; There is a pin hole outer tube outer end, is connected with the pin hole inserting of inner sleeve the inner by pin, and the inner axially selective grafting of uniform a plurality of pin holes of inner sleeve realizes that the length of telescopic arm is regulated; The fixedly connected described induction end in the outer end of inner sleeve.
The induction end of described movable tentacle is a cuboid: a cuboid metal sheeting is fixed on the outer end of described telescopic arm inner sleeve, the outside of this metal sheeting fixedly connected a slice cuboid rubber contact, this rubber contact embedded set a slice rectangle foil gauge.
Described foil gauge is connected with the foil gauge lead, after this foil gauge lead passes rubber contact and metal sheeting, through telescopic arm and cylinder inner cavity and stretch out the conduit from cylinder wall.
The utility model has following conspicuous substantive distinguishing features and advantage compared with prior art: cylinder perisporium of the present utility model has movable tentacle, can measure the strain of prestressed concrete pipe pile inwall different parts.
This device had both solved the accuracy deficiency of former stake axial strain assay method, can also reuse, and when experiment needed, same pile tube inside can a plurality of these device for measurement of strain of layered arrangement.
Description of drawings
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is the utility model prestressed concrete pipe pile device for measurement of strain side schematic view;
Fig. 2 is the utility model prestressed concrete pipe pile device for measurement of strain axis generalized section;
Fig. 3 is the utility model prestressed concrete pipe pile device for measurement of strain tentacle organigram;
Fig. 4 is the utility model prestressed concrete pipe pile device for measurement of strain tentacle exploded view;
Fig. 5 is a comparison diagram before and after the utility model prestressed concrete pipe pile device for measurement of strain airbag aeration;
Fig. 6 is the utility model prestressed concrete pipe pile device for measurement of strain strain induction end organigram.
The specific embodiment
Preferred embodiment accompanying drawings of the present utility model is as follows:
Embodiment one: referring to Fig. 1, Fig. 2 and Fig. 5, this pile for prestressed pipe device for measurement of strain, comprise that one can be inserted in cylinder 5 in the tested prestressed concrete pipe pile 19 and the movable tentacle 4 that stretches out from cylinder 5 perisporiums: described cylinder 5 is for settling an air bag 7 in the metal shell 8, this air bag 7 has a gas tube 2 to stretch out from metal shell 8; Described movable tentacle 4 is circumferentially uniform along cylinder 5 axial two rows, and inner and described air bag 7 contacts, and the outer end is an induction end, built-in foil gauge 11, and contact with prestressed concrete pipe pile 19 inwalls.
Embodiment two: present embodiment and embodiment one are basic identical, special feature is as follows: referring to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, above-mentioned movable tentacle 4 is the telescopic arms that are made of tentacle two joint socketed pipes, described metal shell 8 is goed deep in the inner of its outer tube 12, a rubber pad 16 is housed and contacts with described air bag 7; There is a pin hole outer tube 12 outer ends, are connected with pin hole 18 insertings of inner sleeve 13 the inners by pin 6, and inner sleeve 13 inner axially uniform a plurality of pin hole 18 selective grafting realize that the length of telescopic arm is regulated; The fixedly connected described induction end in the outer end of inner sleeve 13.
The induction end of the movable tentacle 4 of above-mentioned movable tentacle is a cuboid: a cuboid metal sheeting 15 is fixed on the outer end of described telescopic arm inner sleeve 13, the outside of this metal sheeting 15 fixedly connected a slice cuboid rubber contact 14, these rubber contact 14 embedded set a slice rectangle foil gauges 11.
Above-mentioned foil gauge 11 is connected with foil gauge lead 9, after this foil gauge lead 9 passes rubber contact 14 and metal sheeting 15, through telescopic arm and cylinder 5 inner chambers and stretch out the conduit 1 from cylinder 5 walls.
The preparation process of the induction end of above-mentioned movable tentacle 4 is as shown in Figure 6: the first step ((a) figure among Fig. 6) is attached to sheet rubber 14 on the metal sheeting 15 in preparation, second step ((b) figure among Fig. 6) fluting 21 and perforate 20 in the middle of sheet rubber 14, the 3rd step ((c) figure among Fig. 6) foil gauge lead 9 connects and stickup foil gauge 11, the 4th step, ((d) figure among Fig. 6) filled and led up with liquid rubber 17, the 5th step ((e) figure among Fig. 6) sheet rubber surface seal band 22.
Application process is as follows: in the use, it is hollow by the lifting rope that has scale that links to each other with suspension ring strain gage to be put into pile tube, scale on the lifting rope can be determined the position put into, connecting the bundle conductor of foil gauge readout instrument and the gas tube of connection inflator pump reaches outside the hole, bundle conductor is connected with the foil gauge reader, and gas tube links to each other with inflator pump.After determinator is put into the position and is determined, begin inflation by inflator pump, air gauge shows that air bag in the cylinder reaches (instrument is determined by experiment the nominal pressure scope before dispatching from the factory) behind the pressure of demarcation, stops inflation and keep-ups pressure, and can test and read the foil gauge reading then.After treating that test is finished, open the gas tube venting, the determinator tentacle promptly breaks away from the pile tube inwall, then device for measurement of strain is hung out with lifting rope, and vanning can be reused after preserving.
Claims (4)
1. prestressed concrete pipe pile device for measurement of strain comprises that one can be inserted in cylinder (5) in the tested prestressed concrete pipe pile (19) and the movable tentacle (4) that stretches out from cylinder (5) perisporium, is characterized in that:
1) described cylinder (5) is to settle an air bag (7) in the metal shell (8), and this air bag (7) has a gas tube (2) to stretch out from metal shell (8);
2) axially two rows are circumferentially uniform along cylinder (5) for described movable tentacle (4), and inner and described air bag (7) contacts, and the outer end is an induction end, built-in foil gauge (11), and contact with prestressed concrete pipe pile (19) inwall.
2. prestressed concrete pipe pile device for measurement of strain according to claim 1, be characterised in that specifically described movable tentacle (4) is the telescopic arm that is made of tentacle two joint socketed pipes, described metal shell (8) is stretched in the inner of its outer tube (12), a rubber pad (16) is housed and contacts with described air bag (7); There is a pin hole outer tube (12) outer end, and pin hole (18) inserting inner by pin (6) and inner sleeve (13) is connected, and the inner axially selective grafting of uniform a plurality of pin holes (18) of inner sleeve (13) realizes that the length of telescopic arm is regulated; The fixedly connected described induction end in the outer end of inner sleeve (13).
3. prestressed concrete pipe pile device for measurement of strain according to claim 2, the induction end that it is characterized in that described movable tentacle (4) is a cuboid: a cuboid metal sheeting (15) is fixed on the outer end of described telescopic arm inner sleeve (13), the outside fixedly connected a slice cuboid rubber contact (14) of this metal sheeting (15), this rubber contact (14) embedded set a slice rectangle foil gauge (11).
4. prestressed concrete pipe pile device for measurement of strain according to claim 3, it is characterized in that described foil gauge (11) is connected with foil gauge lead (9), after this foil gauge lead (9) passes rubber contact (14) and metal sheeting (15), through telescopic arm and cylinder (5) inner chamber and draw the conduit (1) from cylinder (5) wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202061153U CN201671118U (en) | 2010-05-26 | 2010-05-26 | Prestressed concrete tubular pile strain tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202061153U CN201671118U (en) | 2010-05-26 | 2010-05-26 | Prestressed concrete tubular pile strain tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201671118U true CN201671118U (en) | 2010-12-15 |
Family
ID=43328530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202061153U Expired - Fee Related CN201671118U (en) | 2010-05-26 | 2010-05-26 | Prestressed concrete tubular pile strain tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201671118U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194966A (en) * | 2012-01-09 | 2013-07-10 | 上海市基础工程有限公司 | Protection method for conducting wire of embedded instrument |
| CN103362151A (en) * | 2013-07-30 | 2013-10-23 | 中国化学工程第一岩土工程有限公司 | Method for detecting prestress concrete pipe pile horizontal stress |
| CN108018888A (en) * | 2016-11-01 | 2018-05-11 | 上海勘测设计研究院有限公司 | The measuring device and measuring method of marine wind electric field steel-pipe pile inner wall and wadding weft variation contact condition |
| CN108487333A (en) * | 2018-01-25 | 2018-09-04 | 中国地质大学（武汉） | A kind of pile pile and native plug contact surface circulation shear experimental rig and method |
| CN109813465A (en) * | 2019-03-18 | 2019-05-28 | 河南理工大学 | A kind of roadway surrounding rock stress original position dynamic monitor and working method |
| CN110616748A (en) * | 2019-09-04 | 2019-12-27 | 上海建工集团股份有限公司 | Unilateral underground enclosure structure deformation detection robot and detection method |
| CN110984113A (en) * | 2019-12-25 | 2020-04-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Pile body soil pressure box installation system and installation method |
-
2010
- 2010-05-26 CN CN2010202061153U patent/CN201671118U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194966A (en) * | 2012-01-09 | 2013-07-10 | 上海市基础工程有限公司 | Protection method for conducting wire of embedded instrument |
| CN103362151A (en) * | 2013-07-30 | 2013-10-23 | 中国化学工程第一岩土工程有限公司 | Method for detecting prestress concrete pipe pile horizontal stress |
| CN108018888A (en) * | 2016-11-01 | 2018-05-11 | 上海勘测设计研究院有限公司 | The measuring device and measuring method of marine wind electric field steel-pipe pile inner wall and wadding weft variation contact condition |
| CN108018888B (en) * | 2016-11-01 | 2024-03-26 | 上海勘测设计研究院有限公司 | Device and method for measuring contact state between inner wall of steel pipe pile and core filling concrete of offshore wind farm |
| CN108487333A (en) * | 2018-01-25 | 2018-09-04 | 中国地质大学（武汉） | A kind of pile pile and native plug contact surface circulation shear experimental rig and method |
| CN108487333B (en) * | 2018-01-25 | 2019-08-30 | 中国地质大学（武汉） | A kind of tubular pole and native plug contact surface circulation shear experimental rig and method |
| CN109813465A (en) * | 2019-03-18 | 2019-05-28 | 河南理工大学 | A kind of roadway surrounding rock stress original position dynamic monitor and working method |
| CN110616748A (en) * | 2019-09-04 | 2019-12-27 | 上海建工集团股份有限公司 | Unilateral underground enclosure structure deformation detection robot and detection method |
| CN110616748B (en) * | 2019-09-04 | 2021-05-25 | 上海建工集团股份有限公司 | Unilateral underground enclosure structure deformation detection robot and detection method |
| CN110984113A (en) * | 2019-12-25 | 2020-04-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Pile body soil pressure box installation system and installation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201671118U (en) | Prestressed concrete tubular pile strain tester | |
| CN102478472B (en) | Test apparatus used for simulating influence of three-axis loading and unloading on engineering pile | |
| CN105258669B (en) | Rain pipe sedimentation post processing simulation test device and method in a kind of sea silt soil | |
| CN102393449B (en) | Real-time monitoring method and device used for concrete structure | |
| CN114199686B (en) | Model test device and method for operating highway tunnel lining disease evolution law | |
| CN102269676A (en) | High-precision geotechnical simple shear apparatus and use method thereof | |
| CN110095347B (en) | Strain control type unsaturated soil three-axis stretching instrument | |
| CN107328522A (en) | A kind of soil pressure cell caliberating device and its application method | |
| CN205826421U (en) | A kind of device measuring rocks in direct tension mechanics parameter | |
| CN106813977A (en) | Carefully see strain gauge means and measuring method in the cementing area of sand particle nanogel | |
| CN105699202B (en) | A kind of hydraulic device measuring Mechanics Parameters of Rock Mass | |
| CN206311604U (en) | The device of silt/sludge dehydration speed under the conditions of a kind of test multiple physical field | |
| CN104374656B (en) | Submarine pipeline lateral moving loadtest device | |
| CN105628502A (en) | Geomembrane gas inflation deformation mechanics test device | |
| CN110106929A (en) | It is a kind of to plug stake to the model test apparatus and test method of neighbouring grouped piles influence | |
| CN206573391U (en) | A kind of Compression and Expansion testing machine | |
| CN215726704U (en) | Water level rising and falling pile-soil stress deformation model test system | |
| CN212772498U (en) | Inflatable rubber airbag | |
| CN214471449U (en) | A soil pressure gauge initiative liftout formula mounting structure for vertical interface | |
| CN114323983A (en) | Load test device capable of providing lateral pressure | |
| CN210136603U (en) | Pile foundation detection teaching platform | |
| CN201096572Y (en) | Prestressed cable tension tester | |
| CN209296938U (en) | A kind of self-propelled well geophone | |
| CN206768812U (en) | A kind of pretensioned prestressed concrete pipe pile | |
| CN209368899U (en) | Three axis of pile-soil interface folds ring shear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20140526 |