A Construction Method of Underwater Concrete at the Slope Foot of Embankment

Abstract

The invention provides a dike slope toe underwater concrete construction method. When a shipping space is excavated, fixing piles are installed on the outer contour through an excavator, and after the shipping space is excavated, a sandy gravel cushion layer is laid at the bottom; a formwork is installed and fixed, concrete is poured into the shipping space through a concrete pump truck, and in the pouring process, a pouring hose moves in the shipping space in a Z shape until the whole shipping space is fully poured; when setting strength of the concrete is larger than or equal to 50%, pull rods, the fixing piles and the formwork are detached; finally, the inner side of the shipping space is backfilled with a sandy gravel layer, riprap toe protection work is conducted on the outer side, and therefore dike slope toe underwater concrete construction is finished. By the adoption of the method, the advantages of mechanical equipment can be brought into full play in the process of construction, the construction difficulty is lowered, the construction technology is simplified, material consumption is small, construction cost is low, work efficiency is high, economic benefits are good, construction quality is stable and controllable, and safety and environment friendliness are achieved.

Description

technical field [0001] The invention relates to the field of protection and treatment of water conservancy and hydropower and embankment and other corresponding projects at the slope foot of adjacent water, in particular to an underwater concrete construction method at the slope foot of embankment. Background technique [0002] At present, the underwater concrete construction of embankment slopes and wading bank slopes generally has a relatively shallow underwater depth and a large storage area, such as length*width*height of 15m*4m*2m. Vertical support, pouring conduit installation, underwater concrete pouring, and formwork removal, the whole process is cumbersome, heavy workload and slow construction progress. There are the following problems: 1) It is difficult to excavate into trenches due to the original soft foundation on the river bank; 2) The stability of the excavation slope is poor, the formwork is difficult to install underwater, and the workload of positioning, f...

AI Technical Summary

Problems solved by technology

[0002] At present, the underwater concrete construction of embankment slopes and wading bank slopes generally has a relatively shallow underwater depth and a large storage space, such as length*width*height of 15m*4m*2m. Vertical support, pouring conduit installation, underwater concrete pouring, and then formwork removal, the whole process is cumbersome, heavy workload, and slow construction progress

There are the following problems: 1) It is difficult to excavate into trenches due to the soft foundation of the original foundation on the river bank; 2) The stability of the excavation slope is poor, the formwork is difficult to install underwater, and the workload of positioning, fixing and supporting the formwork is large; The pouring method requires multiple sets of conduits to be arranged in the warehouse, and the installation and fixing of each conduit, the installation of the pouring lifting device and other procedures are cumbersome and the workload is heavy; 4) The concrete on the river bank slope is difficult to transport, and the crane is often used for pouring. Due to the shallow pouring depth, During pouring, it is necessary to reasonably allocate the pouring sequence and pouring height difference of each conduit, and the operation is cumbersome; 5) It is difficult to remove the underwater formwork after pouring

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