Method for Installing Prestressed Steel Cylindrical Concrete Pipe in Narrow Space in Casing

Abstract

The invention discloses a method for mounting a prestress steel cylinder concrete pipe in a narrow space in a sleeve. The sleeve comprises an inner pipe and an outer pipe. The method comprises the following steps of: measuring at fixed points before construction; setting an axis, carrying out bulge test and grouting; fixing and laying steel rails in the outer pipe; placing a trolley for loading the inner pipe on the steel rails; jacking the trolley up at a specific position, and taking the trolley back; placing a three-way regulating device which regulates the inner pipe in the three-dimensional direction below the trolley; fixedly connecting a permanent steel gasket below the inner pipe after regulation; and carrying out bulge test and grouting seal at the junction of two inner pipes which are equipped with seal pieces, and mounting the inner pipes in the sleeve section by section sequentially until the finish of the construction. According to the the method, the prestress steel cylinder concrete pipe with the diameter of 2m is installed in the sleeve with the inner diameter of 3m, the sleeve is internally provided with two steel rails for loading the trolley, and the difficulty in the installation of the prestress steel cylinder concrete pipe in the sleeve is overcome; a jack and a winch are both minitype devices, the trolley is self-manufactured in field, the investment is less, and the cost is low; and the construction cycle is short, the proceed is rapid, and the mounting quality is good.

Description

technical field [0001] The invention relates to a pipeline installation method of a water supply and drainage system, in particular to a construction method for installing a φ2m prestressed steel cylinder concrete pipe in a φ3m concrete casing. Background technique [0002] In water supply and drainage projects, a large concentric prestressed steel cylinder concrete pipe (PCCP) is installed in a large casing, and a similar prior art is to install a prestressed steel cylinder concrete pipe in a tunnel. Install the prestressed steel cylinder concrete pipe in the tunnel, and use a special pipe truck for the transportation and installation of the prestressed steel cylinder concrete pipe. Use the pipe truck to install the prestressed steel cylinder concrete pipe. To install the backing plate, the bottom of the backing plate needs to be poured with concrete, which not only takes up a lot of space, but also has high cost and expense. Large prestressed steel cylinder concrete pipes...

AI Technical Summary

Problems solved by technology

Large prestressed steel cylinder concrete pipes are installed in the large casing in the river bottom tunnel. The prestressed steel cylinder concrete pipes are hoisted to the working surface through two shafts on both sides of the river, and the prestressed steel cylinder concrete pipes enter the vertical shaft. The space in the rear shaft is limited, so it is not suitable for the operation of large piggyback vehicles

Images