Comprehensive anti-seepage system of near-channel construction shortcut and construction method

Abstract

The invention discloses a comprehensive anti-seepage system for a near-channel construction shortcut, which adopts row piles formed by combining cast-in-situ bored piles and high-pressure jet grouting piles, and comprises front-row piles close to a near-channel side, rear-row piles close to a foundation pit side, and a main anti-seepage wall arranged in the front-row piles and the rear-row piles along the extending direction of the row piles; the end parts of the front-row piles and the rear-row piles are in closed connection through side-row piles; the main anti-seepage wall extends to the side row piles in the direction of the side row piles at the inflection point of the edge of the foundation pit; the main anti-seepage wall extends towards the rear-row piles at the inflection point of the edge of the foundation pit in the direction perpendicular to the main anti-seepage wall, and an auxiliary anti-seepage wall is formed. The auxiliary diaphragm wall penetrates through the rear-row piles and is in parallel lap joint with the downstream full-cofferdam diaphragm wall on the outer side of the foundation pit, and the lap joint area is subjected to soil consolidation through high-pressure rotary jet grouting; the top elevation of the main diaphragm wall is lower than the bottom elevation of the upper structure, and the main diaphragm wall and the upper structure are flexibly connected. The safety and reliability of the comprehensive anti-seepage system of the near-channel construction shortcut are improved.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a comprehensive anti-seepage system and a construction method for an access road near a waterway. Background technique [0002] With the development of economy and society, single-line ship locks can not meet the demand of passenger and freight volume gradually, and there are more and more double-line ship lock projects. The construction site of the double-track ship lock is often close to the original first-line ship lock and waterway. The construction site usually builds a construction access road adjacent to the waterway to meet the needs of construction personnel, vehicles and material transportation. The construction access road near the waterway is built between the construction foundation pit and the waterway. The construction process is often limited in space, and its safety and stability have a great impact on shipping. During the operation of the ...

AI Technical Summary

Problems solved by technology

The anti-seepage system of double-row piles has good load-bearing performance, but for the construction access road near the waterway with dynamic load, the bored grouting body will produce different degrees of vertical and horizontal strain under the action of large dynamic load, which is bound to be damaged. The close combination between the bored pile and the high-pressure jet grouting pile will cause cracks between the piles, which will have an adverse effect on the anti-seepage effect

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