A kind of emergency special drive-in umbrella type anchor and its application method

Abstract

The invention provides a special drive type umbrella-shaped anchor for rushing to deal with an emergency. The umbrella-shaped anchor comprises an umbrella-shaped anchor head and a connecting rod, wherein the umbrella-shaped anchor head comprises a drive head, a pressure bearing disc, a sliding connecting rod, an anchor head main rod, anchor plates and support rods, the anchor head main rod is connected with the drive head through the sliding connecting rod, the pressure bearing disc is arranged on the sliding connecting rod in a sleeving manner and can slide up and down along the sliding connecting rod, one end of each of the two anchor plates is rotationally connected with the anchor head main rod, the middle of each of the two anchor plates is rotationally connected with one end of the corresponding support rod, and the other end of each support rod is rotationally connected with the pressure bearing disc; the anchor head main rod at the upper end of the umbrella-shaped anchor head is connected with the connecting rod, the umbrella-shaped anchor head and the connecting rod are driven into a soil body by drive equipment, the connecting rod drives the anchor head to move upwards when drawing upwards, the two anchor plates unfold towards two sides of the anchor head main rod and pierce the soil body under the action of frictional resistance of the soil body, and the support rods drive the pressure bearing disc to slide downwards along the sliding connecting rod. The umbrella-shaped anchor is high in construction speed, high in efficiency, large in structure resistance, good in stability and free of disturbance to the soil body structure.

Description

technical field [0001] The invention relates to the technical field of rock-soil mass reinforcement, in particular to a drive-in umbrella-type anchor special for emergency rescue and an application method thereof. Background technique [0002] Soil slopes, foundation pits, anti-floating foundations, anti-dumping foundations, anti-slip foundations, etc. are commonly used geotechnical structures in the construction of highways, railways, port terminals, water conservancy, construction, power transmission and transformation projects. According to relevant national regulations, geotechnical structures are usually designed and constructed according to engineering grades and standards, and are generally stable under normal use conditions; When there are major hidden dangers in quality, it is easy to cause damage such as slipping, toppling, large deformation or landslide, which will have a major impact on people's lives and property safety. The management department will usually pr...

AI Technical Summary

Problems solved by technology

[0005] (2) During the operation of the project, the construction space is relatively narrow, the transportation is inconvenient, and it is difficult to use large equipment; the materials and equipment that need to be reinforced are light and can be completed by manpower;

[0006] (3) The reinforcement measures taken can play a role in time, so as to prevent the further development of the disaster in time; the reinforcement method cannot rely on time-sensitive materials such as cement

[0014] (1) The umbrella anchor developed by Chen Shushen et al. is a good idea, but there are still some shortcomings: the anchor plate is a cantilever structure, and the resistance is provided by the braces, and the structural resistance is limited (2-3t braces will break) ; How the anchor head is installed in the original soil body is not explained in detail; the flexible stays are used, which is not conducive to the opening of the anchor plate, and the soil on the compressed side will be obviously damaged after opening;

[0015] (2) Compared with the above-mentioned structure, the umbrella anchor invented by Zhang Jihong et al. has certain improvements: it is installed in the predetermined reinforcement position by drilling, and the rigid rod is used as the anchor plate to support the skeleton; but because the rigid rod is used as the tension member , the anchor plate is more difficult to open and requires external force, which has a greater damage to the soil on the compressed side; and the structure is too complicated and the cost is high;

[0016] (3) The tension self-locking umbrella type anchor developed by the applicant is installed after pre-drilling, and the anchoring depth is not limited; however, due to the small area of ​​the anchor teeth, the anchoring force is not large; and the implementation process includes drilling, installation , tensioning and locking, etc., the process is relatively complicated, which does not meet the requirements of emergency rescue

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