Multilayer blade-typed multipoint displacement metre anchor head used for soft soil layer

Abstract

The invention discloses a multilayer blade-typed multipoint displacement metre anchor head used for a soft soil layer, wherein the anchor head comprises a plurality of measuring point anchoring head units arranged in a drilling hole of a to-be-tested soil body; each measuring point anchoring head unit is orderly and vertical to each other and connected with each other through a casing pipe from head to tail; each measuring point anchoring head unit is fixed with one longitudinal measuring point of the drilling hole. Each measuring point anchoring head unit comprises a main anchoring head and an anchoring head protective cover, wherein each main anchoring head and each corresponding anchoring head protective cover are connected in thread. The multipoint displacement metre anchoring head in the invention can drive three blade-typed anchoring grasps synchronously with three springs; utilizes elastic energy released instantly to cut into the soft soil to finish anchoring; is not limited by field condition; and is convenient in installation, simple in structure, strong in reliability and stability, good in anchoring effect, strong in anti-skid ability and reliable in performance.

Description

technical field [0001] The invention relates to an anchor head of a multi-point displacement gauge, and more particularly relates to a multi-layer vane type multi-point displacement gauge anchor head for soft ground. Background technique [0002] For construction projects in soft soil areas, because the soft soil layer has the characteristics of high water content, high compressibility, high thixotropy, and low strength, construction in soft soil areas will lead to large soil deformation. Safety, engineering and technical personnel need to constantly understand the settlement deformation of the soil during the construction process, analyze the "time effect" and "space effect" of the soil deformation, to judge the rationality of the project construction, timely feedback analysis and correct and optimize the project construction Existing problems are used to guide subsequent engineering construction. At present, most of the anchor heads of soil displacement meters in soft soi...

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Problems solved by technology

However, this patent is more suitable for anchoring in soil foundation pits and slope walls, and is not suitable for anchoring in water-rich and soft soil layers. If high-pressure grouting is used to open the anchor and cut into the wall of the anchor hole, it will cause damage to the soil structure. Destruction, affecting the accuracy of measurement data

[0006] Chinese patent CN207622U pipe seam anchor type multi-point displacement meter, the device includes pipe seam anchor head, pipe seam anchor head is a truncated cone-shaped anchor head with seam made of spring steel, and is equipped with an open tail ring and barbs, However, the anchor head is mainly used for geotechnical engineering of rock foundations, shafts, chambers and tunnel lights, and cannot be used for anchoring in soft strata.

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