Hole body construction method of reinforced concrete porous circular pipe culvert

Abstract

The invention discloses a hole body construction method of a reinforced concrete porous circular pipe culvert. The construction method comprises the following steps: (S1) a side concrete cushion block, a top concrete cushion block and a middle concrete cushion block are prefabricated; (S2) a foundation trench is dig; (S3) a concrete cushion layer is cast; (S4) multiple reinforcement cages are bound; (S5) an outer side template is mounted; (S6) baseplate concrete is cast; (S7) the side concrete cushion block is placed; (S8) a rubber core mold is inserted, and is inflated by 80%; (S9) the middle concrete cushion block is placed; (S10) a rubber core mold is inflated by 100%; (S11) the top concrete cushion block is placed; (S12) side wall concrete and top plate concrete are once cast; and (S13) the rubber core mold and the outer side template are disassembled. The construction method quickens the construction efficiency, reduces the construction cost, improves the internal straightness of the culvert and the parallelism of multiple holes, and reduces the generation of cold cracks after concrete casting.

Description

technical field [0001] The invention belongs to the technical field of circular pipe culvert construction, and in particular relates to a construction method for a hole body of a reinforced concrete porous circular pipe culvert. Background technique [0002] The circular pipe culvert is the most commonly used culvert structure type in rural road subgrade drainage. The circular pipe culvert consists of two parts: the tunnel body and the entrance. The most common type of circular pipe culvert is reinforced concrete circular pipe culvert. According to the number of holes, reinforced concrete circular pipe culvert is divided into reinforced concrete single-hole circular pipe culvert and reinforced concrete porous circular pipe culvert. At present, the construction methods commonly used for the hole body of reinforced concrete porous circular pipe culvert are: 1. Excavating the foundation trench; 2. Pouring a concrete cushion in the foundation trench; 4. Install outer formwork o...

AI Technical Summary

Problems solved by technology

[0004] 1. Only the upper part of the rubber mandrel can be fixed, but the side part of the rubber mandrel cannot be fixed, especially the porous pipe culvert. It is difficult to fix the rubber mandrel in the middle, so in the process of pouring the side wall concrete , the rubber mandrel will move or swing in the left and right directions, resulting in a large difference between the straightness of the formed reinforced concrete circular pipe culvert body and the parallelism of multiple holes and the set value, thereby reducing the shape of the circular pipe culvert. quality

[0005] 2. After the side wall is poured, the bamboo plywood, wooden wedges and scaffolding pipes that fix the rubber mandrel need to be removed, which requires a lot of labor and increases the construction cost

[0006] 3. The pouring of the side wall and the pouring of the roof are completed in two times. On the one hand, the continuity of the concrete pouring is poor, and the solidification time of the two pouring concretes is not synchronized, which leads to cold cracks in the concrete structure after pouring; on the other hand, the construction time is relatively long. long, affecting construction efficiency

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