Novel bag type expansion body anti-pulling anchor rod and construction method thereof

Abstract

The invention provides a novel bag type expansion body anti-pulling anchor rod and a construction method thereof. The construction method comprises the steps of construction preparation, drilling machine in-place, anchor rod hole forming, high-pressure rotary jet grouting reaming, anchor rod installation, in-bag grouting, in-hole grouting, anchor rod maintenance, anchor rod tensioning and anchorage device and anchor plate installation. An anchor rod is assembled and manufactured according to field requirements, cement paste is injected after manufacturing and installation are completed, after solidification, a second cement anchoring body and a first cement anchoring body are formed, the second cement anchoring body and the first cement anchoring body fix the position of the anchor rod, a anchor rod structure force transmission system and the bearing mechanism are simple and clear, and the determination of a calculated value of the anchoring force and the working load is more accurate; and the anchor rod is manufactured according to actual requirements, loss of construction materials and equipment can be reduced as much as possible, and the problems that an existing anchor rod is small in pulling resistance, low in reliability and large in displacement, the safety of foundation pit supporting cannot be guaranteed, meanwhile, the construction quality is not easy to control, material loss is large in the construction process, anchoring force calculation is inaccurate, and construction process efficiency is low are solved.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a novel capsule-type expanded body pull-out anchor and a construction method thereof. Background technique [0002] With the rapid development of urbanization in our country, non-renewable and limited land resources are becoming more and more expensive and scarce, forcing some buildings to develop in underground space. Because these underground facilities are buried deep and in areas with high groundwater levels, The anti-floating problem of construction engineering is particularly prominent and important. Bolt technology is widely used in the field of geotechnical engineering because it can fully use and improve the strength and self-stabilization of rock and soil. The current bolt has low pull-out resistance, low reliability, and large displacement during use. The safety of the foundation pit support, while the construction quality is not easy to control, the ...

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a new type of capsule-type expanded body pull-out anchor and its construction method. By adopting the new-type capsule-type expanded body uplift-resistant anchor, it has the characteristics of large pull-out force, high reliability and small displacement. The anchor structure The force transmission system and bearing mechanism are simple and clear, the calculation value of the single anchor anchorage force and the determination of the working load are more accurate, the construction quality control is simple, the single anchor has high bearing capacity, short length, and small quantity, reducing the loss of construction materials and equipment. Assembling and construction is simple, which is beneficial to shorten the construction period, and solves the problem of small pull-out resistance, low reliability, and large displacement of the current anchor bolts that cannot guarantee the safety of foundation pit support. At the same time, the construction quality is not easy to control, and material loss during construction Large, inaccurate calculation of anchoring force, low efficiency of construction process

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