An anchorage reaction device for in-situ shear test of roller compacted concrete
A technology of roller compacted concrete and counter force device, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of changing environment and difficult implementation, and achieve the effects of less destructiveness, convenient construction and saving construction time
Active Publication Date: 2016-06-15
辽宁省水利水电科学研究院有限责任公司
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Problems solved by technology
Since the in-situ shear test of RCC needs to be carried out on the project site, and the environment is changeable, the traditional weight method and anchor method have great limitations and are difficult to implement
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[0029] An anchoring reaction device for in-situ shear tests of roller compacted concrete, comprising an anchor reaction mechanism, a vertical loading mechanism and a shear mechanism, characterized in that:
[0030] The anchor reaction force mechanism includes a first expansion anchor, a second expansion anchor, a third expansion anchor, a fourth expansion anchor, a first beam 19 , a second beam 20 and a main beam 21 .
[0031] The first expansion anchor mechanism includes a screw rod 1 , a fixed nut 2 , an upper expansion plug 3 , a petal-shaped sleeve 4 and a lower expansion plug 5 , a first support rod 11 and a first movable nut 15 .
[0032] The upper and lower ends of the screw rod 1 have external threads respectively, and the middle part is an unthreaded segment 6 . Fixed nut 2 is a common hexagonal nut, which is welded and fixed with screw rod 1; the upper expansion plug 3 bottom is a conical body, and its center is an unthreaded hole; the lower expansion plug 5 is a con...
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An anchoring counterforce device for a roller compacted concrete in-situ shear test comprises a first beam and a second beam which are supported by four expandable bolts and are parallelly-arranged. A main beam is vertical to the first beam and the second beam. Two ends of the main beam are fixedly connected with the first beam and the second beam respectively. The anchoring counterforce device also comprises a vertical loading mechanism and a shearing mechanism. Each of the expandable bolts is mainly composed of a screw, an upper expanding plug, a petal-like casing pipe and a lower expanding plug, wherein the petal-like casing pipe is formed by butt joint of three arc petals which are distributed along the peripheral direction and the included angle of two ends of each arc petal relative to the axis of the petal-like casing pipe is 120 degrees. The vertical loading mechanism contains a transverse roller bar, a vertical jack and a horizontal steel plate. The shearing mechanism comprises a vertical steel shim, a shearing-direction jack, a force transmission block and a second vertical steel shim. The anchoring counterforce device provided by the invention has the following beneficial effects: construction is convenient; destructiveness is little; construction time is saved; and especially, an anchoring effect is enhanced.
Description
technical field [0001] The invention relates to a device for in-situ shear resistance test of roller compacted concrete, in particular to an anchoring reaction force device used for in-situ shear resistance test of roller compacted concrete. Background technique [0002] The quality of RCC layer bonding directly affects the quality of RCC, so it is necessary to conduct in-situ shear tests of RCC on site. The in-situ shear test of RCC is a comprehensive test with complex operation steps. The test device is mainly composed of vertical loading system, shear system and anchor reaction system. Currently, the vertical load loading methods commonly used in the test include the ballast method and the anchor method. [0003] The ballast method requires repeated transportation and hoisting, which has disadvantages such as long installation time, low safety performance, and poor stability. Traditional anchor rods are mostly made of steel bars or anchor bars with small diameters. Aft...
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Inventor 刘波汪魁峰夏海江宗兆博张永先宋立元张欣富天生胡庆华谭丽娥苏炜焕阴国旗刘大为李志祥艾新春王兴华马洪山李括宫旭张瑞
Owner 辽宁省水利水电科学研究院有限责任公司