Multi-layer retractable multi-point displacement gauge anchor head for water-rich and weak formation

Abstract

The invention relates to a multi-layer telescopic multi-point displacement meter anchor head for water-rich soft stratum. A plurality of in-hole measuring point anchor head units are arranged in the longitudinal direction one after another. Each in-hole measuring point anchor head unit is designed to be a surface contact type and comprises a main anchor head and an anchor head protective cover, wherein each main anchor head is connected with the corresponding anchor head protective cover by a positioning hole. Each main anchor head comprises an indium steel wire, a fixed pulley device, an external force conversion device and an anchor claw execution mechanism; each indium steel wire and each fixed pulley device receive external force; a contraction action is realized by each anchor claw execution mechanism through the conversion and the drive of each external force conversion device; each external force conversion device comprises a tension spring device and a plurality of special springs; each anchor claw execution mechanism comprises a plurality of triangular blade-type anchor claws; and the number of the special springs is the same as that of the anchor claws. The multi-layer telescopic multi-point displacement meter anchor head has the advantages of good anchoring effect, wide measuring range, simple structure, convenience in construction, high anti-sliding capacity, reliable performance and the like.

Description

technical field [0001] The invention relates to a multi-point displacement gauge anchor head, and more particularly relates to a multi-layer telescopic multi-point displacement gauge anchor head used in water-rich and weak formations. Background technique [0002] In the construction of water-rich and weak ground, the anchoring effect and reliability of the anchor head of the soil displacement meter are related to the safety of the project. At present, most of the anchor heads of soil displacement meters in water-rich and weak strata adopt open-type umbrella-shaped anchor heads, compressed wood anchors, claw-hook anchor heads, grouting or anchoring agent bonding, etc. These anchoring methods have great influence on construction projects Construction has played an important role, but with the development of construction technology, there are many deficiencies in the construction process. The open-type umbrella-shaped soil anchor anchor head, when the umbrella-shaped soil anc...

AI Technical Summary

Problems solved by technology

The open-type umbrella-shaped soil anchor anchor head, when the umbrella-shaped soil anchor is stretched, will cause soil structure damage, especially easily cause the soil at the hole to collapse, reduce the anchoring strength of the soil, and reduce the anti-sliding ability, which will affect the anchorage of the soil Effect: Water-swelling compressed wood anchoring is difficult to install in soil anchoring, inconvenient to operate, difficult to control water injection time and expansion time, and the anchoring strength of the soil is not enough, which will easily cause the measuring point in the hole to move, making the monitoring data inaccurate; claw hook type The anchor head point is in contact with the anchor, and the claw hook will destroy the soil structure, resulting in insufficient anchor strength of the soil, poor reliability, and the measurement point in the hole deviates from the actual monitoring point, resulting in a large error; 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 soil in water-rich and weak strata, especially in water-rich and weak strata, where the soil self-stability is poor , good water permeability and water-rich properties, the anchor head causes damage to the soil structure, which greatly reduces the anchoring force, and lacks hole protection devices, which easily causes holes to collapse and makes measurement inaccurate. There are few reports on the relevant research on the anchor head of the telescopic multi-point displacement gauge

[0004] Chinese patent CN 207622U 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 seams made of spring steel, and is equipped with an open tail ring and barbs , but 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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