Vacuum film spreading device in a vacuum preloaded sealing tank and its application method

Abstract

The invention relates to a vacuum membrane paving device used in a vacuum preloading sealing groove and a using method. By means of the technical scheme, an anti-skidding sleeve is respectively sleeved on two sections of a clamping rod, two ends of the clamping rod are respectively connected with one end of each supporting rod, the other ends of the two supporting rods are respectively connected onto the same stressed ends of rotating hinges, the other stressed ends of the rotating hinges are respectively connected with one end of each force transmission rod, and far ends of the two force transmission rods face to each other oppositely. The vacuum membrane paving device overcomes the shortcomings that a traditional manually paved vacuum membrane has low strength and is unstable, unsafe, large in dug earth volume, high in cost, low in efficiency and the like. The vacuum membrane paving device utilizes the lever principle, provides a large acting force on the clamping rod by exerting small force on the force transmission rods so as to clamp the vacuum membrane, prevents the vacuum membrane from sliding down during paving, and is simple in structure, convenient to manufacture, easy to operate and low in cost.

Description

technical field [0001] The invention belongs to the technical field of civil and construction engineering, and in particular relates to a vacuum film paving device and a use method in a vacuum preloaded sealing tank. Background technique [0002] In soft ground treatment, vacuum preloading method is widely used. Vacuum preloading is a kind of physical curing method. Its principle is to cause negative pressure in the soil in the reinforcement area, reduce the pore pressure at the boundary, and form a certain pressure between the original pore pressure in the soil and the pore pressure at these boundaries. Poor and unstable seepage occurs, with the increase of time, the pore pressure in the soil gradually decreases, and the reduced pore pressure is transformed into the effective stress of the soil, thereby improving the strength of the soil. The construction steps of the vacuum preloading method mainly include: laying a plastic drainage board as a vertical drainage system, la...

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Problems solved by technology

The traditional method of manually laying vacuum membranes has the following disadvantages: both sides of the sealing ditch are soft soil, which is low in strength and prone to instability. It is extremely unsafe for workers to lay the membrane at the bottom of the sealing ditch

In order to ensure construction safety, when excavating the sealing ditch, both sides of the sealing ditch need to be excavated into slopes to prevent the soil on both sides from sliding down. Therefore, the excavation volume is large, which increases the cost, and the construction efficiency of manual film laying is low. Workers need to go down to the bottom of the ditch during the first excavation, and the manual laying surface is limited, the laying takes a long time, and the laying effect is not good

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