A side span cast-in-place section less excavation structure and construction method

Abstract

The invention relates to a side-span cast-in-situ section less excavation structure, comprising box girder, concrete cushion, upper and lower steps of side slope, bridge abutment, sand cushion, side span abutment and manhole at the bottom of the box girder; the upper part of the bridge abutment is provided with a box girder The bottom form of the unexcavated slope body at the bottom of the box girder is sequentially laid with a concrete cushion and a sand cushion; the bottom of the box girder near the side span abutment is provided with a manhole at the bottom of the box girder, and the manhole at the bottom of the box girder is located in the excavation Above the channel; one side of the excavation channel is reserved for the uncoiled surface; the two sides of the box girder are excavated with side slopes, and the side slopes are provided with slope up and down steps. The beneficial effects of the invention are: the invention can greatly reduce the construction period, protect the original appearance of the mountain, reduce the waste of resources, and ensure the virtuous circle of the green construction ecological environment and the social environment by performing less excavation construction on the cast-in-place section of the side span. The concept of sustainable development; the invention can ensure the convenience of the bridge internal inspection and the replacement of the bearing, and the design and maintenance of the manhole passage is more convenient.

Description

technical field [0001] The invention relates to the technical field of construction of cast-in-situ sections of side spans of bridges in mountainous areas, in particular to a structure with less excavation at the bottom of cast-in-place sections of side spans of road cuttings and a construction method. Background technique [0002] The traditional construction of the cast-in-situ section of the cutting edge span generally adopts the construction method of slotted and deep excavation of the support bottom form. First, the original mountain side slope is excavated, and the excavation is 1.8-2.0m below the designed box girder floor elevation, which is for future support. There is room for seat maintenance and replacement. When the cutting depth is deep, grading and excavation and the reserved construction face on both sides are considered at the same time, resulting in a substantial increase in the amount of earth and stone excavated in the mountain, which requires a lot of man...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a side-span cast-in-place section with less excavation structure and construction method in view of the problems of large excavation surface, large engineering quantity and serious damage to the original mountain body in the general excavation method of high side and steep slope in mountainous areas.

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