Construction technology for foam concrete treatment of abandoned sewage pipeline at urban overpass foundation

Abstract

The invention discloses a construction technology for foam concrete treatment of an abandoned sewage pipeline at an urban overpass foundation. The construction technology comprises the following steps that first, measuring and paying off are conducted for pile foundation construction, and dry drilling is carried out to the top of the abandoned sewage pipeline to be treated; second, the abandoned sewage pipeline is removed; third, a percussion drill is used for refilling cohesive soil layer by layer, the cohesive soil is compacted into the abandoned sewage pipeline, and after extrusion cannot be conducted, filling compaction is conducted continuously to be the position above the pipeline top; fourth, dado mud is matched with the drill for conducting pile foundation drilling construction; fifth, grouting is performed; before the fifth step, a plurality of holes are directly drilled from the current situation ground to the abandoned sewage pipeline to be treated along the abandoned sewage pipeline, so that injection holes are formed. By the adoption of the construction technology, the filling quality of the pipeline can be guaranteed, potential safety hazards are eliminated, the filling amount of grouting fluid is reduced, the degree of fullness of the abandoned sewage pipeline is improved, the filling compaction of the abandoned sewage pipeline is guaranteed, and open water at the crossed position of the abandoned sewage pipeline and the pile foundation is avoided.

Description

technical field [0001] The invention relates to a treatment method for urban underground waste sewage pipes, in particular to a construction method for non-excavating treatment of urban underground waste sewage pipes. Background technique [0002] With the development of the city, the population of the old urban area is increasing, and the waste of sewage pipes is increasing. In view of the characteristics of municipal engineering, the cost and difficulty of using traditional methods to deal with underground waste pipelines are high, and it is very difficult for the life of the surrounding situation. Greater impact. During the construction of the pile foundation of the viaduct in the North Third Ring Project of Zhengzhou’s Third Ring Road, it conflicted with the D1600 sewage pipeline that is about to be abandoned. The length of the conflict was 6,000m, and there were more than 500 conflict points. The design solution was to excavate and abolish the sewage pipeline. However,...

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Problems solved by technology

[0004] The object of the present invention is to provide a process for the treatment of waste sewage pipes, which can quickly, simply, and low-cost treat urban waste sewage pipes without danger and environmental pollution, and can effectively solve the problem of waste pipe collection. Safety accidents caused by the washing of unknown external water, road subsidence caused by dilapidated pipes, etc.

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