Sinking construction method for prefabricated post-cast open caisson

Abstract

The invention discloses a sinking construction method for a prefabricated post-cast open caisson. The method comprises the following steps that an anchor pile is embedded in a soil body below an opencaisson designed elevation; a plurality of prefabricated well wall blocks are assembled into the open caisson on the construction site, a plurality of vertical through holes penetrating through the well wall are circumferentially formed in the well wall of the open caisson at intervals, anchor ropes are arranged in all the through holes in a penetrating mode, the lower ends of the anchor ropes areconnected with the anchor piles, the upper ends of the anchor ropes penetrates through a center hole jack located in the upper end face of the open caisson and are fixed through anchor nuts; and thecenter hole jack applies downward pressure to the open caisson so as to sink the open caisson into the soil body. The method has the advantages that through vertical sectioning and transverse blocking, smallest assembly units, namely the well wall blocks can be prefabricated in a factory, and the construction period of the open caisson is shortened; a cast site required by site open caisson assembling on the open caisson construction site is reduced; and the anchor piles, the anchor ropes and the center hole jack form an open caisson construction device for providing sinking force for the opencaisson, and the sinking gesture of the open caisson can be effectively controlled.

Description

technical field [0001] The invention relates to the technical field of caisson construction, in particular to a sinking construction method of a prefabricated and poured caisson. 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...

AI Technical Summary

Problems solved by technology

However, the reaction force system adopted in the current caisson construction method 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, site leveling at the caisson construction site is required, A lot of construction sites are reserved for caisson material stacking, steel bar processing, concrete mixing, etc., which is not conducive to the construction of caissons in areas with narrow sites and dense surrounding buildings

During the caisson construction process, the caisson must be poured on site, and the operation process is complicated. It is difficult to guarantee the quality of the caisson poured on site, and after pouring, it is necessary to wait for the strength of the caisson wall to meet the requirements before sinking the caisson, and the construction period is long.

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