Device and method for testing sleeve connecting structure grouting compactness in hammering pre-pressing mode

A connection structure and compactness technology, which is applied in the field of prefabricated building structure testing, can solve the problems of difficult quantitative detection of steel sleeve grouting compactness, and achieve the effects of reducing testing costs, improving quality, and accurate grouting compactness

Pending Publication Date: 2019-03-01
ZHEJIANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the defect that the quantitative detection of the grouting density of the reinforcement sleeve is difficult in the prior art, and provide a hammer preloading device for testing the groutin

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  • Device and method for testing sleeve connecting structure grouting compactness in hammering pre-pressing mode
  • Device and method for testing sleeve connecting structure grouting compactness in hammering pre-pressing mode
  • Device and method for testing sleeve connecting structure grouting compactness in hammering pre-pressing mode

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and implementation steps.

[0029] The present invention is suitable for detecting the grouting compactness of the sleeve connection structure. In the common sleeve connection structure, the first steel bar J and the second steel bar M are generally connected through the connecting sleeve, and the inner wall K of the sleeve is injected There is grouted concrete L. After the sleeve connection structure is grouted, there may be a problem of insufficient grouting density in the sleeve, so that the tensile bearing capacity is lower than the design value, which affects the safe and normal use of the sleeve connection structure. Therefore, in the present invention, the external steel structure preloading member C is installed in place, and a suitable preload is applied to the dowel F through the fixing nut D so that it is in direct or indirect close contact with the grouting co...

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Abstract

The invention discloses a device and method for testing sleeve connecting structure grouting compactness in the hammering pre-pressing mode, and belongs to the field of testing methods and equipment.The bottom periphery of an outer steel structure pre-stressing member is fixed on a wall body of a steel sleeve connecting structure to be detected; a cover body of the outer steel structure pre-stressing member is provided with a through hole, and a nut is fixed at the position of the through hole. A force transmitting rod is a rigid rod body, and the middle portion of the rod body is externallytapped. The force transmitting rod penetrates the through hole in the cover body to be screwed into the nut, and threads on the rod body and the nut are in thread fit for driving the force transmitting rod to move up and down. The bottom of the force transmitting rod is closely supported on a grouting body of the steel sleeve connecting structure to be detected. A dynamic signal collecting sensoris attached to the force transmitting rod. A force measuring hammer is used for knocking the end of the force transmitting rod. The device is utilized to achieve the quality inspection of field connection of assembled structural steel sleeves and complete the quantitative analysis of the grouting density in the sleeve.

Description

technical field [0001] The invention belongs to the field of prefabricated building structure testing, and in particular relates to a device and method for testing the grouting compactness of a sleeve connection structure by hammering and preloading. Background technique [0002] As an emerging green, environmentally friendly and energy-saving building method, the prefabricated building structure has many advantages and has attracted extensive attention from relevant personnel at home and abroad, representing the direction of technological progress in the construction industry. The quality control of the on-site connection of prefabricated components is very important to ensure the safe and normal use of prefabricated buildings, but there is still a lack of effective detection methods in the project, so it is urgent to research and develop methods for the detection and evaluation of the on-site connection quality of prefabricated structures Quality control during and after c...

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Application Information

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IPC IPC(8): G01N9/36
CPCG01N9/36G01N33/383G01M5/0066G01M7/08G01N3/066G01N3/30G01N2203/001G01N2203/0039G01N2203/0058G01N29/045
Inventor 王奎华郑茗旺谭婕刘鑫杨学林
Owner ZHEJIANG UNIV
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