Method for exerting prestressed anchor rod on model
A prestressed and bolt technology, which is applied in the installation of bolts, earthwork drilling, foundation structure tests, etc., can solve the problems of applying prestressed bolts and not being able to truly simulate the actual situation, and achieve the effect of strong operability
Inactive Publication Date: 2009-07-22
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology
[0003] The purpose of the present invention is to provide a fast, simple and accurate prestressed bolt application method for model tests, which solves the problem that it is difficult to apply prestressed bolts to it due to the small size of the model, and it is impossible to truly simulate the actual situation. simulated test method
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[0011] The specific steps of the present invention will be further described below in conjunction with the accompanying drawings.
[0012] Such as figure 1 shown and figure 2 As shown, when forming a hole, the drill bit 1 is first selected according to the aperture requirements, and the tail of the drill bit 1 is connected with a steel wire 3 capable of transmitting power; The steel conduit 2 is used to control the direction of the drill bit 1 . The drill bit 1 carries the steel wire 3 through the steel conduit 2 to form a hole on the model to the required depth, then the steel conduit 2 is removed. Get a simulated anchor rod 6, insert one end in the borehole 5 and control the anchor rod 6 so that it is in the center of the borehole 5; the end of the anchor rod 6 outside the borehole 5 is threaded. Use a syringe to push the prepared slurry 7 into the depth of the borehole 5 through the flexible conduit, and make the inside of the borehole 5 full with the slurry 7 . After ...
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The invention belongs to the engineering geological technology field, and particularly relates to a method used for applying the pre-stress to an anchor bolt in the model test, which solves the problems in the similar model test that the model size is too small that the pre-stress can be difficult to be apply to the anchor bolt and the actual condition can not be simulated really. The invention provides a quick, convenient and accurate method for applying the pre-stress to the anchor bolt. The adopted technical proposal includes the four steps of drilling holes, arranging the simulative anchor bolt, grouting and extending and locking the anchor bolt. The technical proposal of the invention adopts a steel lead as a drill bit to transmit the power and adopts a steel guide pipe to control the drilling direction; the use is convenient and practical and the operability is strong; an injector is adopted for grouting and a self-made mini-type stress ring is adopted to apply the pre-stress to the anchor rod so as to solve the problem that the traditional large-volume device can not enter the narrow space; and the pre-stress can be accurately and intuitively applied to the anchor rod and the invention is especially suitable for the models such as cavities or underground plants and the like which have the internal space.
Description
technical field [0001] The invention belongs to the technical field of engineering geology, and in particular relates to a method for applying prestressed bolts to a model in a similar model test. Background technique [0002] Prestressed anchor (cable) technology is an efficient, economical and practical engineering technology, because it can fully utilize the potential stability of engineering geological bodies or structures and improve their internal stress state, it is widely used in the construction of large and super large projects. has a wide range of applications. The prestressed anchor cable technology is a concealed project with complex procedures, many constraints and difficult to remedy. Therefore, a reasonable design before construction is extremely important. Since the research on the reinforcement mechanism and effect of prestressed anchors (cables) is not deep enough, it is difficult to accurately obtain parameters such as the bearing capacity of single-hole...
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IPC IPC(8): E02D33/00E21D20/02E02D5/74
Inventor 顾金才刘汉东王四巍
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER