A suction anchor device

Abstract

A suction anchor rod device comprises a hollow cylindrical anchor rod, the bottom port of the anchor rod is sealed, the top port of the anchor rod is provided with a sealing cover plate, and the sealing cover plate and the anchor rod are detachably connected; One section is the bottom section, and the end near the top port is the top section. There are several sieve holes distributed on the side wall of the bottom section of the anchor rod, and the screen holes are communicated with the inner cavity of the anchor rod; The lifting device can move up and down along the axial direction of the anchor rod and is arranged in the anchor rod, and the lifting plate divides the inner cavity of the anchor rod into an upper cavity and a lower cavity, and it is defined that the upper cavity includes the top opening, and the bottom opening is the upper cavity. The lower chamber; also includes a pressure measuring device for detecting the air pressure in the lower chamber and a pressure regulating device for adjusting the air pressure in the lower chamber. The invention utilizes the principle of effective stress, and under the condition of a certain total stress, the effective stress is increased by reducing the excess pore pressure, thereby increasing the side friction resistance of the anchor rod, so as to improve the overall stability and safety.

Description

technical field [0001] The invention relates to a suction anchor rod device. Background technique [0002] Anchor rods are widely used in projects such as slopes, foundation pit support, foundation pit anti-uplift or building anti-floating projects. , so that the whole remains safe and stable. Therefore, bolts are usually embedded in soil layers with better geological conditions. However, when the geological conditions are poor, such as saturated soft clay, the water content is high, the strength is low, and the friction coefficient is small, and the total resistance provided is often small. The measures of resistance have the defects of low efficiency and high cost. Especially in the case of engineering emergency, it is often unable to meet the requirements of fast and efficient, increasing the safety risk. At the same time, the traditional method of increasing the contact area of ​​the end to improve the bearing capacity of the anchor rod makes the structure of the anc...

AI Technical Summary

Problems solved by technology

However, when the geological conditions are poor, such as saturated soft clay, its water content is high, its strength is low, and its friction coefficient is small, so the total resistance provided is often small, while the traditional way to increase the total anchor bolt by increasing the end area Resistance measures have the disadvantages of low efficiency and high cost

Especially in the case of emergency engineering, it often cannot meet the requirements of fast and efficient, increasing safety risks

At the same time, the traditional method of increasing the contact area at the end to increase the bearing capacity of the anchor makes the structure of the anchor more complicated and brings great inconvenience to the construction.

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