CN203672767U - Gravity type dial indicator clamp for steel bar bond stress test - Google Patents

Gravity type dial indicator clamp for steel bar bond stress test Download PDF

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Publication number
CN203672767U
CN203672767U CN201320749244.0U CN201320749244U CN203672767U CN 203672767 U CN203672767 U CN 203672767U CN 201320749244 U CN201320749244 U CN 201320749244U CN 203672767 U CN203672767 U CN 203672767U
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CN
China
Prior art keywords
balance plate
dial indicator
test
concrete
clock gauge
Prior art date
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Active
Application number
CN201320749244.0U
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Chinese (zh)
Inventor
叶锦华
孙西濛
亓路宽
叶春琳
张勇宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing road and Bridge Construction Group Co., Ltd
Original Assignee
BEIJING ROAD AND BRIDGE CONSTRUCTION Co Ltd
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Priority to CN201320749244.0U priority Critical patent/CN203672767U/en
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Publication of CN203672767U publication Critical patent/CN203672767U/en
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Abstract

A gravity type dial indicator clamp for a steel bar bond stress test is used for the test of measuring the bond stress of steel bars and concrete in a reinforced concrete structure, and comprises a balance plate, at least three positioning bolts and a dial indicator supporting part, wherein the balance plate is provided with at least three supporting through holes; the positioning bolts are screwed in the supporting through holes; the balance plate is further provided with an exposing through hole; a dial indicator is supported on the balance plate through the dial indicator supporting part, and exposes out of the bottom surface of the balance plate through the exposing through hole. The clamp provided by the utility model can be placed on the top surface of a reinforced concrete test block through the positioning bolts, the operation is convenient, and the stabilization is easy; the levelness of the balance plate can be adjusted through the positioning bolts, and the condition that the dial indicator is perpendicular to the concrete surface is ensured, so that the test precision requirements can be satisfied better; in the testing process, when the concrete test block crazes, instability can be prevented, or the falling of the dial indicator can be avoided, and the test cost and risk are reduced; the mounting, adjusting and disassembling speeds are high, and the efficiency is high in continuous tests.

Description

A kind of gravity type clock gauge fixture for bonding strength test
Technical field
The utility model relates to the bond stress test of measuring between Reinforcing Steel Bar In Reinforced Concrete Structure and concrete, specifically, relates to a kind of bonding strength test gravity type clock gauge fixture.
Background technology
In reinforced concrete structure, characterizing one of the very important characteristic that interacts between reinforcing bar and concrete is the cohesive force (abbreviation bonding strength) between reinforcing bar and concrete.Bonding strength directly has influence on internal force and the distortion of reinforced concrete structure.Therefore be, one of content of reinforced concrete structure detection to the mensuration of bonding strength.
At present, the tester that is used for measuring concrete opposing slippage of reinforced bar energy intensity of force (bonding strength test) is mainly KB-150 type concrete resistance to plucking instrument, and this instrument meets GB/50081-2002 " standard for test methods of mechanical properties of ordinary concrete " and SD105-82 " concrete for hydraulic structure testing regulations ".While using KB-150 type concrete resistance to plucking instrument to measure between reinforcing bar and concrete slippage, be mainly that the clock gauge by being fixed on the gate-type fixture on concrete test block is measured.In process of the test, gate-type fixture is fixed on the side of concrete test block by screw rod, and this brings following problem: the one, and fixture is difficult to be stably fixed on concrete test block; The 2nd, be difficult to guarantee that clock gauge is vertical with concrete surface; The 3rd, if there is concrete test block cracking in process of the test, will cause on gate-type fixture and move or upper spring, cause clock gauge to damage, increase test danger and cost.
Utility model content
The utility model is made in view of the above problems, and object is to provide a kind of more reasonable, convenient and safe fixture.
To achieve these goals, the utility model provides a kind of bonding strength test gravity type clock gauge fixture, comprise: balance plate, at least three bolts and clock gauge support portion, described balance plate has at least three support through holes, described bolt is screwed into described support through holes, described balance plate also has the through hole of exposing, and clock gauge is supported on described balance plate by described clock gauge support portion, and exposes from described the bottom surface that through hole exposes described balance plate.
Gravity type clock gauge fixture for bonding strength test described in the utility model, described clock gauge support portion comprises at least three fastening bolts, at least three bolt stationary installations and sleeve pipe, described bolt stationary installation is fixed on described balance plate, vertically upwards extend at described through hole surrounding and the described balance plate of exposing, each described bolt stationary installation has fastening bolt holes, the center of circle of described sleeve pipe with described in expose through hole the center of circle overlap, on described sleeve pipe, in the position corresponding with described fastening bolt holes, be provided with screw.
According to gravity type clock gauge fixture for bonding strength of the present utility model test, compared with fixture in the past, have the following advantages:
(1) fixture is placed on reinforced concrete test block end face by multiple bolts, easy to operate, is easy to stablize;
(2) by the levelness of bolt adjustment plate, can guarantee that clock gauge is vertical with concrete surface, thereby meet better the requirement of test accuracy;
(3) in process of the test, when there is concrete test block when cracking, can unstability or clock gauge is dropped, reduce experimentation cost and risk;
(4) installation, adjusting and dismounting speed are fast, high in long run test testing time-effectiveness rate.
Accompanying drawing explanation
Fig. 1 is according to the vertical view of the fixture of the utility model one embodiment.
Fig. 2 is the side view of the fixture shown in Fig. 1.
Fig. 3 is the schematic diagram that uses the fixture shown in Fig. 1 to carry out resistance to plucking test.
Embodiment
Below in conjunction with accompanying drawing, the utility model is specifically described.
As shown in Figure 1, 2, comprise according to the fixture of the utility model one embodiment: balance plate 1, bolt 2, fastening bolt 3, bolt stationary installation 4, sleeve pipe 5.
Balance plate 1 is for example steel plate, and size is for example 140 × 140 × 16mm.Four jiaos at balance plate 1 respectively have a support through holes 6, and its size is for example Φ 15mm, inside has screw thread.In the central authorities of balance plate 1, there is one to expose through hole 7, its size is for example Φ 5mm.
Bolt 2 is for example that 100mm is long, the screw rod of Φ 14mm, and quantity is 4.
Fastening bolt 3 is for example that 30mm is long, the screw rod of Φ 5mm, and quantity is 4.
Bolt stationary installation 4 is fixed on balance plate 1, is exposing the vertically upwards extension of through hole 7 surroundings and balance plate 1.The quantity of bolt stationary installation 4 is 4, and each bolt stationary installation 4 is provided with fastening bolt holes 8, and its size is for example Φ 5mm, inside has screw thread.
Sleeve pipe 5 is for example plastic tube, and size is for example external diameter 20mm, internal diameter 10mm.On sleeve pipe 5, in the position corresponding with each fastening bolt holes 8, be provided with screw 9.
Assemble method and the using method of fixture of the present utility model are as follows.
(1) what bolt clamp device 4 is welded to balance plate 1 exposes through hole 7 surroundings, bolt 2 is screwed in the support through holes 6 of 1 four jiaos of balance plates, then places it in concrete test block 10 end faces;
(2) sleeve pipe 5 is placed on to balance plate 1 central authorities, the center of circle of sleeve pipe 5 is overlapped with the center of circle of exposing through hole 7 of balance plate 1 central authorities;
(3) fastening bolt 3 is screwed in the fastening bolt holes 8 of bolt stationary installation 4 and in the screw 9 of sleeve pipe 5;
(4) that clock gauge is inserted to sleeve pipe 5 and balance plate 1 exposes through hole 7, makes the measuring staff of clock gauge fully expose the bottom surface of balance plate 1;
(5) adjust each fastening bolt 3 amounts of being screwed into, make it clamp clock gauge;
(6) adjust each bolt 2 amounts of being screwed into, it is fully contacted with concrete test block end face, until clock gauge measuring staff contacts with the steel bar end exposing in concrete test block, and guarantee that clock gauge has certain initial value;
(7) in the situation that meeting above-mentioned (6), finely tune each bolt 2, make balance plate 1 in horizontality.
In the above description, the shape of balance plate 1 is rectangle, and still, the utility model is not limited to this.The shape of balance plate 1 can be other shape, for example square, circular etc.
In the above description, the quantity of bolt 2 and support through holes 6 is 4, and still, the utility model is not limited to this.For example, their quantity can be 3.
In the above description, the quantity of fastening bolt 3, fastening bolt holes 8 and screw 9 is 4, and still, the utility model is not limited to this.For example, their quantity can be 3.
In the above description, expose through hole 7 and be positioned at the central authorities of balance plate 1, still, the utility model is not limited to this, also can be positioned at the position of departing from from central authorities.
In the above description, fastening bolt 3, bolt stationary installation 4 and sleeve pipe 5 form clock gauge support portion, are used for supporting clock gauge, and still, the utility model is not limited to this, can also adopt other structure that clock gauge is supported on balance plate 1.

Claims (2)

1. a gravity type clock gauge fixture for bonding strength test, is characterized in that, comprising: balance plate, at least three bolts and clock gauge support portion,
Described balance plate has at least three support through holes, and described bolt is screwed into described support through holes,
Described balance plate also has the through hole of exposing,
Clock gauge is supported on described balance plate by described clock gauge support portion, and exposes from described the bottom surface that through hole exposes described balance plate.
2. gravity type clock gauge fixture for bonding strength according to claim 1 test, is characterized in that, described clock gauge support portion comprises at least three fastening bolts, at least three bolt stationary installations and sleeve pipe,
Described bolt stationary installation is fixed on described balance plate, vertically upwards extends at described through hole surrounding and the described balance plate of exposing, and each described bolt stationary installation has fastening bolt holes,
The center of circle of described sleeve pipe with described in expose through hole the center of circle overlap, on described sleeve pipe, in the position corresponding with described fastening bolt holes, be provided with screw.
CN201320749244.0U 2013-11-25 2013-11-25 Gravity type dial indicator clamp for steel bar bond stress test Active CN203672767U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320749244.0U CN203672767U (en) 2013-11-25 2013-11-25 Gravity type dial indicator clamp for steel bar bond stress test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320749244.0U CN203672767U (en) 2013-11-25 2013-11-25 Gravity type dial indicator clamp for steel bar bond stress test

Publications (1)

Publication Number Publication Date
CN203672767U true CN203672767U (en) 2014-06-25

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Application Number Title Priority Date Filing Date
CN201320749244.0U Active CN203672767U (en) 2013-11-25 2013-11-25 Gravity type dial indicator clamp for steel bar bond stress test

Country Status (1)

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CN (1) CN203672767U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104154839A (en) * 2014-08-07 2014-11-19 桂林理工大学 Relative slippage measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104154839A (en) * 2014-08-07 2014-11-19 桂林理工大学 Relative slippage measuring method

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20161214

Address after: 100045 Beijing city Xicheng District South Road No. 17

Patentee after: Beijing municipal administration road and bridge limited company

Address before: 100068 Fengtai District South Fourth Ring Road, Beijing, No. 163

Patentee before: Beijing Road and Bridge Construction Co., Ltd.

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20170106

Address after: 100075 Fengtai District South Fourth Ring Road, Beijing, No. 163

Patentee after: Beijing road and Bridge Construction Group Co., Ltd

Address before: 100045 Beijing city Xicheng District South Road No. 17

Patentee before: Beijing municipal administration road and bridge limited company