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 units 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 in threaded connection. The multipoint displacement metre anchoring head disclosed by 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 blade 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 so...

AI Technical Summary

Problems solved by technology

Water-swelling compressed wood anchorage is difficult to install in soil anchorage, inconvenient to operate, difficult to control the water injection time and expansion time, and the anchorage strength of the soil is not enough, which will easily cause the measurement point in the hole to move, making the monitoring data inaccurate; claw hook anchor head Point contact anchoring, the claw hook will destroy the soil structure, resulting in insufficient soil anchoring strength and poor reliability, making the measurement point in the hole deviate from the actual monitoring point, resulting in a large error; the open umbrella soil anchor head, when When the umbrella-shaped soil anchor is opened, the soil structure will be damaged, especially the soil at the hole will collapse, which will reduce the anchoring strength of the soil, reduce the anti-sliding ability, and affect the anchoring effect of the soil; use grouting or anchoring agent to bond the hole When the internal measurement point is anchored, the grouting time is long, the construction is inconvenient, and the anchoring effect is not good in the extremely soft soil layer, resulting in unreliable anchorage strength, resulting in measurement errors and affecting the accuracy of the data

[0003] The anchor heads of the above soil displacement meters are not suitable for anchoring the soil in soft soil areas, especially in water-rich and weak strata, where the soil self-stability is poor, water permeability and water-rich properties are good, and the soil structure is caused when the anchor head is anchored. The damage of the anchoring force will be greatly reduced, and the lack of hole protection devices will easily cause the hole to collapse and make the measurement inaccurate. However, there are few reports on the relevant research on the anchor head of the multi-layer blade multi-point displacement gauge in the soft soil layer.

[0004] 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.

This patent is suitable for the measurement of soft rock formations, coal bodies and soil layers, but it is not suitable for water-rich and weak soft formations, which may easily cause damage to the soil structure at the anchorage position, resulting in insufficient anchoring force of the soil mass and affecting the accuracy of displacement measurement.

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