Suspension bridge large-diameter secant pile gravity type anchorage foundation enclosure structure and construction method

Abstract

The invention discloses a suspension bridge large-diameter secant pile gravity type anchorage foundation enclosure structure and a construction method. The suspension bridge large-diameter secant pile gravity type anchorage foundation enclosure structure comprises a plurality of I-stage secant piles and a plurality of II-stage connecting piles, the I-stage secant piles and the II-stage connecting piles are sequentially and circularly connected and enclose to form a circular enclosure, and a plurality of dewatering wells are arranged in a foundation pit in the enclosure; and waterproof curtains are arranged at the joints of the outer walls of the I-stage secant piles and the II-stage connecting piles. According to the design, the structure is simple, the lining does not need to be constructed through a reverse construction method in the excavation process, therefore, construction procedures are reduced, the construction period is shortened, damage to the enclosure structure caused by lining construction is prevented, and the application range of the suspension bridge is widened. The invention further discloses a corresponding construction method of the suspension bridge large-diameter secant pile gravity type anchorage foundation enclosure.

Description

Technical field [0001] The present invention relates to the field of bridge engineering, in particular, a large diameter bite pile gravity anchor base envelope structure and construction method. Background technique [0002] Anchor is one of the most important structures of the anchoring of the ground anchor suspension bridge, which is to transmit the main cable pull to the anchor block, and then pass the anchor anchor to the anchor base, and finally pass it to the foundation In order to balance the main cable pull force, provide anchoring force for the main cable. Common anchor forms have a gravity anchor, tunnel anchor and rock anchor. In terms of adaptability, considering different basic forms, gravity anchor is almost suitable for all occasions, anchor base envelope, and their spatial arch effects can be controlled by side displacement. Within a small range, in addition, due to the spatial symmetry of the circular enclosure structure, the soil pressure acting on the arch circ...

AI Technical Summary

Problems solved by technology

[0003] During the construction of the circular ground connection wall, it is necessary to pre-embed the connecting steel bars in the reinforcement cage and connect the lining steel bars, so that the lining and the ground connection wall form a whole. The enclosure structure needs to be chiseled. During the chiseling process, the steel bars of the wall are often exposed due to improper operation. Therefore, the construction of the inner lining not only increases the construction process, but the wall structure should be damaged during the chiseling process.

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