A long-distance parallel separation structure of four underground lines of urban rail transit

Abstract

The invention discloses an urban rail transit underground four-wire long-distance parallel separation structure which comprises two main lines led out of a junction station, and two entrance / exit section lines, wherein the main lines led out of the junction station are positioned on two sides of the entrance / exit section lines. The separation structure is characterized in that the two entrance / exit section lines overpass and obliquely cross to one sides of the two main lines on a first interchange close to the junction station; the two entrance / exit section lines extend in a curve shape behind the first interchange and overpass and obliquely cross to the other sides of the main lines on a second interchange which is in large-angle crossing with the main lines and far away from the junction station; the two main lines gradually draw close to each other behind the first interchange; and the two main lines are provided with a connecting passage at the closing part between the first interchange and the second interchange. According to line space transformation, long-distance underground four-wire parallel separation of the two main lines and the two entrance / exit section lines is realized by virtue of the two interchanges, the condition that the normal line connecting passage underneath passes through the entrance / exit section line interval is avoided, the length of the connecting passage is shortened, and the engineering construction risk is lowered.

Description

technical field [0001] The invention relates to rail transit engineering, in particular to a long-distance parallel separation structure of four underground lines of urban rail transit. Background technique [0002] In recent years, urban rail transit has risen rapidly in major cities. With the increase of rail transit network and urban development intensity, there are more and more control factors such as control buildings and municipal pipelines, and the laying of subway rail transit lines is greatly restricted. , there is a situation where the parallel length of the main line and the entry and exit section lines exceeds 600 meters. According to the disaster prevention requirements, when the length of the interval tunnel is greater than 600 meters, a communication channel should be set up. From the aspects of project investment, project risk and feasibility Long-distance parallel line layout puts forward new requirements. Currently common solutions are figure 1 As shown,...

AI Technical Summary

Problems solved by technology

However, the main line of this method needs to set up the connecting channel 4 of the two main lines 2 in the parallel section of the four lines (that is, the parallel section of the two main lines 2 and the two entry and exit lines 3). Corridor 4 passes through the section of access line 3, forming a super-long communication channel 4 about 35m long. Using the freezing method for construction, the construction risk is very high, and the project investment is also greatly increased. So how to achieve long distance (> 600 meters) The early separation of the four underground parallel lines is a problem that needs to be solved

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