Main track traffic-keeping method used during construction period of highway reconstruction and extension

Abstract

The invention discloses a main track traffic-keeping method used during the construction period of highway reconstruction and extension. According to the method, two temporary openings are successively formed in each segment of median strip; a highway to be reconstructed and extended is divided into construction areas A and construction areas B in a long and short alternate mode; after one construction area A is constructed to a lower layer under the road surface first, vehicles run in the corresponding construction area B through the temporary openings of the median strip; and the positions of the passing temporary openings are changed according to the construction progress, so that working faces are created for alternate construction of the construction areas A and the construction areas B, and whole-time two-way four-lane traffic-keeping is realized. By means of the method, the engineering sense is clear, and operation is easy. The method can be used for two-way four-lane traffic-keeping of a main track during the construction period when a two-way four-lane highway is reconstructed and extended into eight two-way lanes or more.

Description

technical field [0001] The invention relates to a method for ensuring the traffic of main line roads during the reconstruction and expansion construction period of an expressway, and is particularly suitable for the traffic protection of the main line with two directions and four lanes during the reconstruction and expansion of the original two-way four-lane high-speed highway into a two-way expressway with more than eight lanes. Background technique [0002] From the 1990s to the beginning of this century, most of the expressways built in my country were two-way four-lane. With the development of the national economy and the improvement of people's living standards, the traffic flow on the expressway has increased significantly, resulting in a gradual decrease in its service level. Some projects have been done domestically to transform 4 lanes into two-way 8-lane or even two-way 10-lane. Traffic protection during reconstruction and expansion construction is a very difficult ...

AI Technical Summary

Problems solved by technology

Traffic protection during reconstruction and expansion construction is a very difficult issue. From the perspectives of improving construction progress and ensuring construction safety, it is the most reliable to close the entire section of the existing expressway for construction; but from the perspective of ensuring that the expressway provides a convenient way for people to travel, From the perspective of not affecting the normal operation of major urban economies, during the reconstruction and expansion construction period, it is necessary not to significantly reduce the service level but to keep the expressway unobstructed; Road managers are almost unacceptable

[0003] In previous expressway reconstruction and expansion projects, due to the inoperability of the traffic protection plan, many of the traffic protection plans scheduled at the beginning of the construction could not be implemented, and measures such as long-distance two-way two-lane traffic, forced diversion, and even closed construction of sections had to be taken. , such as the Beijing-Shibai Expressway, etc., have seriously affected the driving safety and construction safety during the construction period and the traffic between the cities connected by the expressway

Utilizing the opening of the original central divider or adding temporary openings in the central divider to achieve alternate traffic openings on the left and right sides is a common solution. If one or two temporary openings are set in the central divider, the area around the temporary openings cannot be solved when the left and right sides are opened to traffic alternately. In order to deal with the problem of old road disease and widening on both sides, in order to deal with this area, most of the temporary sidewalks are paved, and the vehicles drive slowly through the sidewalks. In addition, the distance between the front and rear of the temporary opening area is short, which is not conducive to ensuring construction quality and construction safety.

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