Construction method for penetrating large-pipe-diameter jacking pipe through sea wall

Abstract

The invention provides a construction method for penetrating a large-pipe-diameter jacking pipe through a sea wall. The construction method comprises the following steps that the pipeline direction is marked on the sea wall; a plurality of first grouting holes are drilled in the left side and the right side of the pipeline direction before pipe jacking, the plurality of first grouting holes are arranged in the longitudinal direction of the pipeline direction, and grouting is conducted in a riprap area of the sea wall through the first grouting holes, so that consolidation barriers are formed on the left side and the right side of the pipeline direction correspondingly; pipe jacking construction is conducted through a pipe jacking device, so that the pipeline penetrates through the riprap area of the sea wall in the pipeline direction; and a plurality of second grouting holes are drilled in the two sides of the pipeline after pipe jacking, a plurality of third grouting holes are drilled in the top of the pipeline, the plurality of second grouting holes and the multiple third grouting holes are arranged in the extending direction of the pipeline, the second grouting holes and the first grouting holes are arranged in a staggered mode, and grouting is conducted in the riprap area of the sea wall through the second grouting holes and the third grouting holes, so that the upper side, the lower side, the left side and the right side of the pipeline are connected into consolidation blocks. According to the construction method for penetrating the large-pipe-diameter jacking pipe through the sea wall, embankment settlement can be prevented, and the embankment structural strength is improved.

Description

technical field [0001] The invention relates to the technical field of pipe jacking construction, in particular to a construction method for pipe jacking with a large pipe diameter passing through a seawall. Background technique [0002] At present, most of the sewage treatment plants are located near the river or the sea, and the sewage is discharged into the river and sea after a series of purification treatments in the sewage treatment plant. In the drainage process, the drainage pipes are generally pre-buried under the embankment and discharged into the river through the drainage pipes. [0003] During the construction of the drainage pipe, it is generally necessary to pass through the guard. At this time, there are two construction methods: one is to open the pipeline, that is, to excavate and bury the drainage pipe directly on the embankment. Although this method is simple, it is easy to damage the whole of the embankment. The second is to use the pipe jacking technol...

AI Technical Summary

Problems solved by technology

[0004] In the pipe jacking project of the tail water discharge port of the large-scale sewage treatment plant passing through the Pearl River seawall, the original embankment has been reconstructed many times, and the geology is complex and changeable. For riprap and silt, the existing pipe jacking technology is used for pipe jacking construction. Due to the large diameter of the pipe, if the seawall is not specially treated, the drill bit will disturb the riprap on both sides during pipe jacking construction, causing internal holes and causing embankment damage. Subsidence

Images