Construction method of cast-in-place caisson formwork system

Abstract

The invention relates to a construction method for a cast-in-situ caisson formwork-supporting system. The construction method comprises the following main construction steps: (1) excavation of a foundation pit; (2) laying of cushion layers; (3) building of a scaffold; (4) erection of first-section caisson formworks; (5) concrete pouring and maintenance; (6) detachment and sinking for the first-section caisson formworks; and (7) erection of second-section caisson formworks. The structure disclosed by the invention is convenient to disassemble and assemble, high in construction efficiency, capable of realizing cantilever formwork-supporting in a caisson and realizing the horizontal movements of the formworks, adaptive to caisson formwork-supporting systems with different heights, and high in economic and technical benefits.

Description

technical field [0001] The invention relates to a cast-in-place caisson formwork system, in particular to a construction method for a cast-in-place caisson formwork system. Background technique [0002] The application of caissons in practical engineering is increasing. However, due to the uncertainty of geological conditions, the diversity of construction environments, the complexity of construction management, etc., the construction of caissons makes the construction of caissons non-deterministic. feature. At the same time, the inner mold of the caisson wall is affected by the lateral pressure of the concrete during concrete construction, so the more it is drilled, the tighter it will be, and it will not cause cracking or leakage. However, the inner mold of the caisson must be supported firmly to prevent large deformation. [0003] The traditional caisson support formwork uses steel pipes to build bent frames as the formwork support system. This process uses a large numb...

AI Technical Summary

Problems solved by technology

However, the inner mold of the caisson must be supported firmly to prevent large deformation

[0003] The traditional caisson support formwork uses steel pipes to build bent frames as the formwork support system. This process uses a large number of steel pipes, and the erection period is long, and it is prone to defects such as formwork floating, expansion, and poor flatness and verticality of the concrete wall. Construction Difficult to guarantee quality

The formwork support inside the caisson needs to set up scaffolding from top to bottom. Due to the excavation of the soil inside the caisson, it is necessary to repeatedly erect and dismantle the scaffolding, and with the excavation of the soil in the caisson, the underground construction is more complicated. It is more difficult to erect scaffolding inside the well construction; the outer formwork of the caisson also needs to be repeatedly installed and removed, and the construction efficiency is low

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