Construction method of semicircular caisson and pile foundation combination breakwater

Abstract

The invention relates to a construction method of a semicircular caisson and pile foundation combination breakwater which comprises a caisson and a pile foundation. The caisson is a semicircular caisson formed by casting based on a combination steel form. The construction method comprises: using the combination steel form to carry out layerwise casting of the semicircular caisson on a premanufacture site according to the sequence of a bottom plate, a vertical plate, a rib plate and a semicircular arch ring, wherein in the overall manufacture of the vertical plate and the rib plate, the interesting parts of the vertical plate and the rib plate are provided with embedded sleeves to form mounting holes for a pile foundation; injecting water into the caisson through an opening of the semicircular arch ring at the construction site, and seating the semicircular caisson in a specific position; driving the pile foundation to a specific depth; connecting the pile foundation and the semicircular caisson in a whole. The construction method is applicable to soft soil foundations and deep waters, and has the advantages of good construction convenience, zero need for rubble bedding, short marine operation time and reusability.

Description

technical field [0001] The invention relates to a combination breakwater of a caisson and a pile foundation. Background technique [0002] Semicircular breakwater (such as: a kind of semicircular breakwater, publication number CN206736844U) is a kind of novel breakwater structure adapting to soft ground, and usually consists of prefabricated semicircular components or semicircular caissons and riprap foundation beds. Compared with traditional vertical breakwaters and slope breakwaters, semicircular breakwaters have the advantages of light weight, simple construction, reusability, beauty, uniform distribution of foundation stress, small wave force, and good anti-sliding and anti-overturning stability. advantage. [0003] When the existing semi-circular breakwater was constructed, the semi-circular caissons were placed on the riprap bed. When constructing on soft soil foundation, it is necessary to excavate the foundation or reinforce the soft foundation first, and then plac...

AI Technical Summary

Problems solved by technology

There are four main problems in this. One is that because of the need to build a riprap foundation bed, a lot of stone materials are needed, and the mining of stone materials will damage the ecological environment; The extra burden will easily cause the breakwater to sink and damage; the third is that the anti-sliding stability of the existing semicircular breakwater is provided by the friction between the bottom of the semicircular caisson and the top of the riprap bed. When the water is deep and the waves are large, In order to maintain the anti-sliding stability of the breakwater, it is necessary to fill more sand in the semicircular caisson, which increases the cost and construction period. At the same time, the increase in the self-weight of the structure will threaten the bearing capacity of the foundation, but the increase in the anti-sliding safety factor reduces the The vertical bearing capacity of this structure limits the application of this structure in deep water breakwaters; Fourth, the construction time is increased due to the riprap operation

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