An inflatable expansion displacement gauge anchor head for soft ground

Abstract

The invention relates to an air inflation expansion displacement meter anchor head for a soft soil stratum. The anchor head comprises a plurality of air inflation expansion anchoring heads, a hollow central pipe and high-pressure air inflation pipes, the number of the high-pressure air inflation pipes is equal to that of the air inflation expansion anchoring heads, air bags are arranged in the air inflation expansion anchoring heads, elliptical blade anchor grippers are arranged outside the air inflation expansion anchoring heads, upper connecting sleeves and lower connecting sleeves are arranged at the upper ends of the air inflation expansion anchoring heads, the hollow central pipe penetrates into the air inflation expansion anchoring heads and is connected with the upper connecting sleeve and the lower connecting sleeve on each air inflation expansion anchoring head in a threaded manner, one end of each high-pressure air inflation pipe is connected with a ground high-pressure air inflation device, and the other end of each high-pressure air inflation pipe penetrates the hollow central pipe and extends into the air bag in the corresponding air inflation expansion anchoring head. Compared with the prior art, the air inflation expansion displacement meter anchor head has the advantages that the anchor head is high in accuracy, simple to mount, large in measuring range, safe in construction and high in working efficiency, the measuring process is not interfered by construction, artificial measuring errors are avoided and the like.

Description

technical field [0001] The invention relates to a displacement gauge anchor head, in particular to an inflatable displacement displacement gauge anchor head used in soft ground. Background technique [0002] When carrying out engineering construction in soft soil areas, the commonly used anchor heads for soil displacement meters mainly include umbrella-shaped soil anchors, compressed wood anchors, claw-hook anchors, grouting or anchoring agent bonding, etc. Due to the ever-changing engineering construction environment, coupled with the high water content and high compressibility of the soft ground, these anchoring methods usually have difficulty in installation, inconvenient operation, and insufficient anchoring strength during the construction process. Therefore, it cannot meet the construction technical requirements in these complex environments. Especially in the water-rich and weak strata in soft soil areas, due to the poor self-stability of the soil, good water permeab...

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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 make the anchor grasp open and close to the wall of the anchor hole, the soil structure will be caused. damage, affecting the accuracy of measurement data

[0005] Chinese patent CN2076227U pipe seam anchor type displacement meter, the device includes pipe seam type anchor head, pipe seam type anchor head is a truncated cone-shaped anchor head with a slot made of spring steel, and is equipped with an open tail ring and barbs, but the Anchor heads are mainly used for geotechnical engineering of rock foundations, shafts, chambers and tunnel lights, but not for anchoring in water-rich and weak soft strata

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