Construction method for controlling cracks in deep-buried circular culvert of mountain road

Abstract

The invention discloses a construction method for controlling cracks in a deep-buried circular culvert of a mountain road. The construction method includes the following steps that (1) a roadbed is constructed in a filling mode to the designed height of the top of the circular culvert; (2) the roadbed and a foundation are excavated to the designed elevation of a base of the circular culvert; (3) the base of the circular culvert is poured and maintained; (4) a prefabricated circular culvert body is mounted, a crescent-shaped soil arch guiding cushion layer made of elastoplastic materials is arranged at the top of the circular culvert body, and the two ends of the soil arch guiding cushion layer extend to the two ends in the horizontal outer diameter direction of the circular culvert body correspondingly; (5) the roadbed around the circular culvert is filled in a layered mode and manually tamped; and (6) a soil layer at the top of the circular culvert is rolled in a layered mode, and the roadbed is constructed in a filling mode to the designed elevation. The crescent-shaped soil arch guiding cushion layer is arranged on the circular culvert, and the load on the upper portion of a soil arch is transferred to be borne by the nearby roadbed. The designed load of the circular culvert is distributed in a rectangular shape and larger than the actual load, distributed like collapsing bodies, of the circular culvert, the load on the upper portion of the circular culvert is transferred to be borne by the nearby roadbed, and it is guaranteed that the stress on the circular culvert is smaller than the designed load and within a safety range, so that cracking is prevented.

Description

technical field [0001] The invention belongs to the field of engineering construction, and in particular relates to a construction method for controlling cracks of deep-buried garden pipes and culverts on mountain roads. Background technique [0002] With the implementation of the national new regional coordinated development plan, many mountain roads need to be built, and setting up deep-buried garden pipes and culverts is an economical and practical method for high-fill mountain roads. Because circular pipe culverts can be produced in a centralized manner, the cost is low, it is convenient for quality control, and the construction and installation are convenient. When the design flow rate is small, the filling soil has a certain height. It is quite common to use circular pipe culverts as road drainage and irrigation structures. Therefore, the design, production and construction quality of circular pipe culverts have a great influence on the project cost, project progress a...

AI Technical Summary

Problems solved by technology

In actual engineering, reinforced concrete circular pipe culverts are often caused by one or more reasons, such as improper handling of steel cage manufacturing, prefabrication, maintenance, circular pipe culvert foundation treatment, pipe joint treatment, backfilling, etc. Leakage will affect the stability of the subgrade, and in severe cases, it will cause embankment collapse and engineering accidents, which will directly affect the quality of the project and the construction progress.

However, the main reason for the cracking of the circular pipe culvert is that the actual load exceeds the design load range

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