Construction Technology of Foundation Pit Supporting with Arched Sheet Pile Supporting Structure

Abstract

The invention discloses a multi-arch sheet pile supporting structure and a construction process. The multi-arch sheet pile supporting structure is used for enclosure of the peripheral wall of a foundation pit and comprises I-shaped sheet piles arranged along the supporting positioning line of the foundation pit at intervals. The center of the bottom face of each I-shaped sheet pile is provided with a tenon arranged in the longitudinal direction of the I-shaped sheet pile. Multi-arch mounting grooves are symmetrically formed in the two sides of each tenon. Concrete soil-blocking arches with the soil-blocking and water-stopping effects are embedded between the multi-arch mounting grooves of the adjacent I-shaped sheet piles. A water-stopping rubber belt with a waterproof sealing function is arranged at the joint of each concrete soil-blocking arch and the corresponding multi-arch mounting groove. According to the multi-arch sheet pile supporting structure and the construction process, the combination structure of the I-shaped sheet piles and the concrete soil-blocking arches is adopted, so that soil blocking and water stopping of the foundation pit are achieved through the concrete soil-blocking arches with cubic-parabola-type curved surfaces, stress is more reasonable, the force transfer effect is better, the supporting rigidity is high, it can be ensured that all the I-shaped sheet piles are stressed uniformly, and the supporting effect is improved; according to the assembled type split supporting structure, construction is convenient and rapid, members can be used repeatedly, and therefore manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a construction technique for foundation pit support of a multi-arch type sheet pile support structure. Background technique [0002] The rational design of the enclosure system in foundation pit engineering is the core issue. The system should not only play the role of enclosure slope stability, but also prevent water and soil loss outside the foundation pit, so as to control the ground settlement and horizontal displacement around the foundation pit. within the allowable range. At present, the types of foundation pit enclosure used in the project are mainly steel sheet piles, reinforced concrete sheet piles, bored pile retaining walls, underground diaphragm walls, deep-mixed cement-soil gravity retaining walls, soil-nailed walls, and composite soil-nailed walls, etc. Steel sheet piles are fast in construction and easy to operate, but the support depth is not ve...

AI Technical Summary

Problems solved by technology

At present, the foundation pit enclosure types used in the project are mainly steel sheet piles, reinforced concrete sheet piles, bored pile retaining walls, underground diaphragm walls, deep-mixed cement-soil gravity retaining walls, soil-nailed walls, and composite soil-nailed walls, etc. Steel sheet piles are fast in construction and easy to operate, but the support depth is not very large, so there are certain limitations in use; cement mixing piles are suitable for general foundation pit support and water stop, but the effect of pile formation in complex underground environments cannot be guaranteed, so various Both support techniques need to be further improved

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