Construction method for pile-anchor press-in caisson sinking

Abstract

The invention discloses a piled anchor press-in type caisson sinking construction method. The piled anchor press-in type caisson sinking construction method is characterized by comprising the following steps that anchor piles are embedded in a soil body under the caisson designed elevation in advance; a plurality of vertical through holes penetrating the well wall are arranged on the well wall ofa caisson in the circumferential direction at intervals, anchor cables are arranged in all through holes in a penetrating manner, the lower ends of the anchor cables are connected with the anchor piles, and the upper ends of the anchor cables penetrate a center penetrating jack on the upper end face of the caisson to be fixed through anchoring nuts; and the center penetrating jack is jacked to enable the caisson to generate downward pressure, and the caisson is pressed and sinks into the soil body. The piled anchor press-in type caisson sinking construction method has the advantages that the anchor piles, the anchor cables and the center penetrating jack are used for forming a sinking construction device to provide sinking force to the caisson, limitation by a site is avoided, the method is suitable for caissons in various shapes, the caisson sinking gesture can be effectively controlled, and stress in the caisson sinking process is even and stable.

Description

technical field [0001] The invention relates to the technical field of caisson construction, in particular to a pile-anchor press-in type caisson sinking construction method. Background technique [0002] The caisson is a construction method for underground engineering and deep-buried foundations. With the development of modern construction technology and construction machinery, the caisson has gradually become a common type of enclosure structure for deep-buried underground structures, and it is economical and reasonable. , Simple structure, easy to guarantee engineering quality and other advantages, it is widely used in underground structures, foundations, foundation pit support and other projects. [0003] The sinking of the caisson mainly relies on its own weight to overcome the frictional resistance between the well wall and the soil and the resistance under the blade foot to sink to the design elevation. The choice of caisson sinking construction method depends on fac...

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Problems solved by technology

However, the reaction force system adopted in the current construction method of press-in caisson sinking generally requires a large construction site, and has a relatively large adverse effect on the surrounding environment and buildings during the construction process; in addition, its structure is complex, and caisson construction The process of the method changes frequently, and it is difficult to apply to the situation of fast and stable construction of large caissons; in addition, common caisson sinking construction methods often use pressure-bearing "corbels" and prefabricated piles, which will have additional effects on the caisson wall force, which is not conducive to the force of the well wall

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