A Simple Method to Prevent Bending of Anchor Rod Steel Waist Beam When Tensed
A technology of anchor rod steel and tensioning, which is applied in excavation, construction, infrastructure engineering, etc., can solve problems such as bending of steel beams, achieve the effect of solving bending, convenient and quick implementation, and improving tensile strength
Active Publication Date: 2020-09-01
北京建材地质工程有限公司 +2
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[0005] The purpose of the present invention is to provide a simple method to prevent the steel beam of the anchor rod from bending when it is stretched, so as to solve the problem of bending of the steel beam when the anchor rod is stretched in the prior art
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[0026] see Figure 1-Figure 6 , the present invention is a kind of simple and easy method that makes anchor rod steel waist beam not bend when tensioning, and specific method is: after construction slope protection pile 8 and inter-pile protective layer 21, utilize anchor rod drilling rig to complete the design anchor rod construction again Assembling and welding the steel beam assembly, that is: two parallel I-beams 11 are welded to each other with a plurality of trim plates (ie connecting plates) 19 and inclined pads 12 to form a steel beam assembly (on both sides of the I-beam 11 All can be welded plate 19), each of these inclined pads 12 is corresponding to each slope protection pile 8; .
[0027] In order to prestress the anchor rod so that all parts are in close contact and make the steel strand 18 completely straight, take 10-20% of the design tension load and stretch it 1-2 times to ensure that the steel beam assembly has been completely hung and positioned . At thi...
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Abstract
A simple method for preventing steel waist beams of anchor rods from bending during stretching comprises the following steps: assembling and welding of steel beams, primary stretching, and spraying ofconcrete: spraying full concrete to the rears of the steel beams to form steel beam rear concrete, spraying and filling concrete into a cavity between two I-shaped steels from a gap in the front of asteel beam assembly to form steel beam cavity concrete, covering, preserving heat and moisture, and solidifying for 24-36 hours; and finally, secondary stretching: enabling each anchor rod to be tensioned to 1.4 times the standard value of axial force. The simple method has the advantages that according to the method, cavities of the steel beams are filled with the concrete while the backs of thesteel beams are filled with the concrete, and the steel beams are stretched after the concrete is solidified to reach a certain strength, the tensile strength of the steel beams is greatly improved,the problem that the steel beams are obviously bent when the anchor rods are stretched is effectively solved, and the method is convenient, fast, easy to implement, low in cost and quite reliable.
Description
technical field [0001] The invention relates to a simple method for preventing the steel waist beam of the anchor rod from bending when it is stretched, which is used in the tensioning construction of the anchor rod in the foundation pit support construction of the foundation foundation, and in the pile-anchor support system of the foundation pit support After the bolt grouting body reaches a certain strength, it needs to be stretched and locked to prevent the bending of the steel waist beam, which belongs to the field of construction engineering. Background technique [0002] As we all know, in the foundation pit support construction of the foundation foundation in the construction field, the pile-anchor support system is a very commonly used support type, especially in deep foundation pit support, for example, the depth exceeds 15m, and the edge of the foundation pit is close There are buildings, roads or underground pipelines, etc. Soil-nailed walls or composite soil-nail...
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IPC IPC(8): E02D17/04E02D5/74
Inventor 何世鸣李江田震远周与诚郁河坤陈辉司呈庆黄鑫峰贾城梁成华王海宁王建明郝雨洪伟杜高恒郭跃龙陈鹏温敏洁
Owner 北京建材地质工程有限公司