Construction process of precast concrete channel

Abstract

The invention provides a construction process of a precast concrete channel. The construction process comprises the following steps: a, sectioning, namely, according to the load capacity of a vertical transportation machine, reasonably sectioning according to the length of a channel, wherein the channel refers to a reinforced concrete channel; b, channel processing, namely, processing and precasting the sectioned channels in a sectioning mode and in a template form, and pre-burying embedded parts on the two sides of the connecting openings of the channels, wherein the connecting openings are designed according to the seaming process; c, foundation treatment and cushion layer construction, namely, excavating out the soft soil of the cushion layers of the channel, filling the cushion layers with sand or broken stone and leveling, tamping in layers till the compactness satisfying the design requirement is achieved, and pouring the cushion layers of the channels; d, surveying and positioning; e, hoisting in-position of the sectioned channels; f, connecting and fixing; and g, acceptance inspection. According to the construction process of the precast concrete channel, the construction is convenient and rapid, the quality of the product is effectively controlled, and the influences of weather and geographical environments are eliminated; the construction speed is high, and the influences caused by mounting civil engineering cross constructions are reduced to the minimum; good anti-permeability and anti-seismic property are achieved; the working plane is small, and the influences to the surrounding environment are low.

Description

Technical field [0001] The invention relates to the field of concrete trench construction, in particular to a construction process for precast concrete trenches. Background technique [0002] The reinforced concrete channel is a thin-walled water tight structure with high impermeability requirements. The traditional construction method is mainly based on cast-in-place concrete structure. The cast-in-place concrete channel is usually about 20m per section, and the interval between sections is large. If the foundation is unevenly settled or subjected to external loads (earthquakes), it is easy to break. Longitudinal foundation bearing capacity requirements are high, and longitudinal reinforcement must be increased. In addition, due to the dense steel bars, thin sidewalls, and limited construction space of the trenches, the formwork support and concrete pouring in the construction are very difficult; and the cast-in-place operations are affected by the season, climate and ambient t...

AI Technical Summary

Problems solved by technology

In addition, due to the dense reinforcement of the concrete trench, the thin side wall, and the limited construction space of the trench, it has brought great difficulties to formwork support and concrete pouring during construction; and the cast-in-place operation is affected by seasons, climate and ambient temperature. Influenced by the impact, it is easy to cause common defects on the concrete surface; rubber waterstops are used to connect the concrete trenches between the cast-in-place sections. Difficult to guarantee

In addition, the cast-in-place trench formwork requires a large amount of investment and a long construction period, and the progress of installation and civil engineering cross-construction will be affected

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