Earth pressure gauge embedding device and embedding method

Abstract

The invention discloses a soil pressure meter embedding device. The soil pressure meter embedding device comprises a grout pipe of a high pressure jet grouting machine, a soil pressure meter, a reaction frame and a centering guide, wherein the soil pressure meter is fastened on the reaction frame through a bolt; the reaction frame is loosely connected with the centering guide through a left-hand thread, and is positioned with a positioning pin; the centering guide is connected with a filling pipe and the grout pipe through right-hand threads; and an electric wire on the soil pressure meter and an iron wire fixedly connected to the positioning pin pass through the centering guide and the group pipe, and pass through the ground. A soil pressure meter embedding method comprises the followingsteps of: putting sand aggregate into a drill hole, measuring the altitude (lower than the embedding altitude of the soil pressure meter) and connecting the grout pipe with the soil pressure embedding device; putting the assembled soil pressure meter embedding device on a designed altitude; putting water-washed and air-dried coarse sand into the drill hole while knocking the grout pipe; compactlyfilling coarse sand into the peripheral space of the soil pressure meter; pulling an iron wire on the orifice ground; pulling the positioning pin onto the ground; turning the grout pipe rightwards onan orifice to separate the group pipe from the device; and filling the sand aggregate back into the drill hole till the designed altitude is reached. According to the invention, after a cut-off wall is built, the soil pressure meter has an accurate measured result of soil pressure change caused by the load change of a wall body, and reliable basis is provided for stress analysis and comprehensiveevaluation.

Description

technical field [0001] The invention relates to the field of earth pressure testing carried by retaining walls, underground anti-seepage walls and underground buildings, in particular to an earth pressure gauge embedding device and embedding method. Background technique [0002] In order to test the earth pressure value of the retaining wall, the underground anti-seepage wall and the buildings below the ground, the commonly used primary instrument is the earth pressure gauge, commonly known as the earth pressure box. Reserve or dig a pit, and then fix the earth pressure gauge on the surface of the building. [0003] In order to study the stress and strain caused by the soil pressure of the high shotcrete cutoff wall, it is necessary to bury the earth pressure gauge on the high shotcrete wall and the downstream side. However, the embedding cannot meet the normative standard for pre-embedded in the retaining wall. Because the surface of the high-sprayed wall is not as smooth ...

AI Technical Summary

Problems solved by technology

[0003] In order to study the stress and strain caused by the soil pressure of the high shotcrete cutoff wall, it is necessary to bury the earth pressure gauge on the high shotcrete wall and the downstream side. However, the burial cannot meet the normative standard for pre-embedded in the retaining wall

Images