Construction method for making prestressed back for box-culvert jacking

Abstract

The invention discloses a construction method for making a prestressed back for box-culvert jacking. The construction method is characterized by comprising the steps as follows: preparing the prestressed back according to the maximum jacking force required for box-culvert jacking on one side of a sliding plate; burying a plurality of prestressed steel strands in the prestressed back and the sliding plate; stressing the prestressed steel strands to form a whole structure; prefabricating a box culvert on the sliding plate; and jacking the box culvert through a jack. According to the construction method, under the circumstance that a natural back is inexistent or the natural back cannot provide an enough box-culvert jacking force, the prestressed back is fabricated to provide the jacking force required for box-culvert jacking so as to finish the box-culvert jacking construction; the ground damage degree is small, the traffic is not influenced, the vehicles on the ground are guaranteed to run smoothly, and the traffic pressure is relieved; and noise and environmental pollution cannot be caused in the construction process, less construction equipment is used, the construction method is simple, economic and reasonable, the jacking construction can be carried out in winter without weather influence, the jacking distance is longer, and the construction safety is high.

Description

technical field [0001] The invention relates to a box culvert jacking construction method, in particular to a box culvert jacking construction method under the condition that there is no natural back or the back cannot provide sufficient jacking force. Background technique [0002] In recent years, with the development of the economy, there are more and more vehicles in the city, and the problem of traffic jams is becoming more and more serious. In order to control pedestrians crossing the street, reduce the time for vehicles to wait for signal lights, and set up pedestrian underground crossing passages to ensure people's travel safety, Improve urban traffic conditions. For this reason, box culvert jacking construction is considered. [0003] Due to the high filling of the Second Ring Road, the longest distance of the box culvert jacking construction is about 50 meters. This road is heavy in traffic and is not suitable for open-cut construction with closed traffic. It canno...

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Problems solved by technology

[0003] Due to the high filling of the Second Ring Road, the longest distance of the box culvert jacking construction is about 50 meters. This road is heavy in traffic and is not suitable for open-cut construction with closed traffic. It cannot provide a large area of ​​working surface and has no natural consequences. The back or the back that cannot withstand enough jacking is used as a support, providing a supporting back with enough jacking force, which increases the difficulty of construction

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