A construction method of self-compacting concrete pouring with hole-piercing pipes

Abstract

The invention provides a construction method for self-compacting concrete pouring through pipes, which includes the following steps: S1: welding a plurality of large-diameter steel pipes connected in sequence, and arranging them in the tunnel lining cavern, and using end templates for the steel pipes at both ends Blocking; S2: The pump pipe connected to the pump truck extends into the steel pipe; S3: Each steel pipe is arranged with a concrete pouring hole at the top of the steel pipe, and the connecting pipe installed at the pouring hole is connected to the pump pipe through a hose; S4: Since two pump trucks are used to pour from the middle to both ends, it is poured in two layers. The first layer of concrete is poured from bottom to top to the range of 180° from the centerline of the pipe, and the second layer of concrete is poured from the middle steel pipe to the two sides. Segmental pouring of end steel pipes in sequence; S5: Utilizing the high fluidity and self-compacting properties of self-compacting concrete, relying on its own weight to flow, without vibrating to achieve dense concrete. The invention guarantees the installation progress of the steel pipe, shortens the construction period and reduces the construction cost.

Description

Technical field [0001] The present invention relates to a construction method of self-confrecting concrete, and more particularly to a coastal construction method of a cave duct self-compacting concrete. Background technique [0002] Technical background: Self-real concrete originated in 1988, Japan, the University of Tokyo, the promotion of Okun Village. Self-real concrete. Compared with traditional concrete, the amount of thick agriculture of the condensed concrete is small, the amount of powder is increased, and the amount of water and powder is much smaller than the water ash ratio of conventional concrete, and due to the added high performance water reducer, No fluidity can be greatly improved without increasing the amount of water in unit volume. High liquidity, gap passes and anti-abrasion, only by its self-reproduction, without vibration, and has high durability and high-volume stability of concrete. When the operating space is small, the intrinsic concrete reflects its s...

AI Technical Summary

Problems solved by technology

[0009] The invention provides a construction method for self-compacting concrete pouring through pipes, which solves the problem of high labor, material and equipment costs due to the need to install and dismantle pump pipes during multiple pours, and solves the problem of long time-consuming and high cost of the project. problem, the technical solution is as follows:

Images