Vacuum preloading construction method for combining steel sheet pile with clay sealing wall

Abstract

The invention relates to a vacuum preloading construction method for combining a steel sheet pile with a clay sealing wall. The vacuum preloading construction method comprises the following steps that S1, a clay stirring pile sealing wall is piled; S2, steel sheet piles are buried, the steel sheet piles are buried underground, and the top ends of the steel sheet piles protrude out of the ground; S3, plastic drainage plates are buried in a foundation, a through opening is formed in the side face, facing the foundation, of the top end, protruding out of the ground, of the steel sheet piles, the through opening extends to the top faces of the steel sheet piles, and the end part, located on the ground, of the plastic drainage plates is arranged in the through opening in a penetrating mode and extends to the top faces of the steel sheet piles; S4, a fixing piece is mounted; S5, a sealing ditch is dug; S6, a sealing film is laid; S7, a drainage pipe is mounted; S8, a vacuumizing device is mounted; and S9, construction is carried out. By arranging the through opening, a sealing groove, the fixing piece, a sealing ring and a sealing strip, the plastic drainage plates and the drainage pipes are connected conveniently, the connection sealing performance is good, the large vacuum degree can be formed below the sealing film, and the foundation strength improving effect is good.

Description

technical field [0001] The present application relates to the field of soft foundation treatment technology, in particular to a construction method of vacuum preloading of steel sheet pile combined with clay sealing wall. Background technique [0002] As an economical and practical soft soil foundation treatment method, the vacuum preloading drainage consolidation method has been widely used in soft soil reinforcement areas. [0003] Vacuum preloading technology is to first insert plastic drainage boards into the foundation, then lay mesh drainage pipes on the soft soil foundation, connect the plastic drainage boards to the drainage pipes to form a horizontal channel, and then cover the surface of the soft foundation with an airtight sealing film. Use a vacuum device to pump air into the drainage pipe. The air and water in the sealing film and the soft foundation are discharged, the density of the foundation is increased, and the foundation is consolidated quickly to achiev...

AI Technical Summary

Problems solved by technology

[0005] Because the ground surface is usually large, the number of plastic drainage boards installed is also large. The plastic drainage boards are connected to the drainage pipes manually, and the construction workload is heavy, which makes it difficult for workers to make the connection between each plastic drainage board and the drainage pipes smaller. Good sealing connection, the connection between the plastic drainage board and the drainage pipe is prone to poor sealing, which makes the vacuum pressure under the sealing film smaller, resulting in poor air and water drainage in the soil foundation, thus affecting the soft soil foundation reinforcement effect

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