An Anchor Head of Folding-blade Knife Multi-point Displacement Meter Used in Soft Ground

Abstract

The invention relates to a folding blade knife type multi-point displacement meter anchor head for a soft soil ground layer. The anchor head comprises a middle shaft rod, a wall barrel, a base, force transfer rods and a rocking bar, wherein the bottom end of the middle shaft rod is connected with the base, the wall barrel is arranged on the middle shaft rod, the top ends of the force transfer rods are connected with the wall barrel through screws, and the rocking bar is connected with the wall barrel. The folding blade knife type multi-point displacement meter anchor head is characterized by further comprising folding blades, wherein the tail ends of the folding blades are connected with the base, the middles of the folding blades are connected with the force transfer rods, the wall barrel rotates to drive the force transfer rods to control opening and closing of the folding blades, and the middle shaft rod, the base, the folding blades and the force transfer rods are of hollow structures. Compared with the prior art, the anchor head is anchored in a folding blade cutting-in mode, can be used for casting, solidification and anchoring, is suitable for the soft soil ground layer and has the advantages of being little soil body disturbance, convenient to install, light in weight and the like.

Description

technical field [0001] The invention relates to the technical fields of geotechnical engineering monitoring and prevention and control of geological disasters, in particular to an anchor head of a folding blade knife type multi-point displacement gauge used in soft ground. Background technique [0002] In order to grasp the foundation settlement in the survey stage and construction excavation process of foundation pit engineering and underground engineering in soft soil areas, it is necessary to set up multi-point displacement meters in the borehole for monitoring. At present, the existing multi-point displacement measuring point fixing devices for boreholes mainly include shrapnel type, inverted wedge type and hydraulic support type. large, which destroys the original soft soil structure in soft soil areas, and it is often difficult to measure the ideal stratum settlement data. Therefore, the method of measuring a stratum settlement with one hole is often used for measureme...

AI Technical Summary

Problems solved by technology

At present, the existing multi-point displacement measuring point fixing devices for boreholes mainly include shrapnel type, inverted wedge type and hydraulic support type, etc., which are mostly used in rock mass, but because they disturb the soil mass of the borehole wall when the anchoring force is applied. large, which destroys the original soft soil structure in soft soil areas, and it is often difficult to measure ideal stratum settlement data. Therefore, the method of measuring a stratum settlement with one hole is often used for measurement, which greatly increases the project cost. At the same time, the arrangement of observation points Too much also hinders the construction process of excavation and support, and also causes great difficulties in the protection of observation points

In addition, due to the large self-weight of the anchor head of the existing multi-point displacement gauge, the measurement results are often affected by the self-weight in soft soil areas

[0003] Chinese patent CN 202361914U discloses a retrievable multi-point displacement meter. The device includes an orifice reading device, an anchoring device in the hole and a manual joystick. The anchoring method adopts a steel sheet opening type. For soft soil areas, this method cannot Effectively apply the anchoring force, and because the anchor head is separated from the control rod, it is easy to disturb the soil of the hole wall when the control rod is installed and removed, so it is difficult to obtain ideal data of stratum settlement in soft soil areas

[0004] Chinese patent CN 203393695U discloses a horizontal multi-point displacement meter device for geotechnical engineering safety monitoring. The device includes an exhaust pipe, a distal anchor head and a proximal anchor head. It is suitable for monitoring rock mass deformation, but not applicable It is used for the anchoring of soft ground and the measurement of ground settlement, and its grouting pipes and exhaust pipes have no telescopic function, nor are they symmetrical or evenly distributed

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