Pipe jacking machine tool pipe and its application

Abstract

The invention discloses a pipe jacking machine tool pipe which can be applied under different geological conditions. The pipe jacking machine tool pipe comprises a pipe body and is characterized in that a compaction mechanism and a pushing mechanism of the compaction mechanism are arranged on the inner side of the front end of the pipe body, the compaction mechanism comprises compaction blocks, each compaction block consists of circular-arc-shaped side plates, a conical plate, an end plate, a first connecting side plate and a second connecting side plate, the compaction blocks are connected through tenon-and-mortise mechanisms on the first connecting side plates and the second connecting side plates to form a compaction ring, and the compaction ring can axially move in the tool pipe. The pushing mechanism comprises a jack and a support, wherein the support is installed on the inner side of the pipe body, a cylinder body of the jack is installed on the support, and a piston of the jack is in contact with the end plates on the compaction blocks. In open large-caliber pipe jacking construction, the compaction mechanism can conduct compaction, reinforcing and seepage prevention on a front soil body of a water seepage stratum or a soft soil stratum or conduct rapid and effective plugging on an excavating face through a soil retaining plate, and the compaction mechanism can effectively retreat when encountering a stratum having strong self-stabilization capability or an obstacle. The construction method is simple, economical and environmentally friendly.

Description

technical field [0001] The invention relates to the field of underground engineering construction, in particular to a tool tube of a pipe jacking machine and its application, in particular to a tool tube of a pipe jacking machine capable of handling different geological conditions and its application. Background technique [0002] Pipe jacking construction is a non-excavation construction method, and it is a pipeline burying construction technology that does not excavate or excavates less. In the field of municipal and underground engineering construction, the application scope of pipe jacking method is more and more extensive. When using manual or semi-mechanical methods for long-distance large-diameter pipe jacking construction, soil layers with different self-stabilization capabilities may be encountered along the way. When encountering water-seepage strata and soft soil strata, the self-stabilization ability of the face is relatively poor. Water seepage and earthwork co...

AI Technical Summary

Problems solved by technology

For the former, the method of grouting is usually used to pre-reinforce the earthwork at the front end of the tool pipe, which increases the direct cost of the project and prolongs the construction period, and the grout for pre-reinforcement grouting is easy to wrap the tool pipe, which is easy to cause subsequent tool pipe tops Sharp increase in force and severe deformation of the tool tube

For the latter, the current method is a passive reinforcement method, usually after adding a temporary retaining structure, and then adopting the method of grouting to reinforce the front end of the tool pipe, the cost is higher than the former, and the construction period is longer than the former

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