Tunnel construction method for short-tube-joint immersed tube

Abstract

The invention belongs to the technical field of immersed tube engineering, and specifically provides a tunnel construction method for a short-tube-joint immersed tube. The tunnel construction method comprises the following steps: S10, performing assembly line type prefabricating production on the immersed tube, wherein the production comprises concrete pouring which is once forming, and length ofthe formed immersed tube is 20-30m long; S20m transferring the immersed tube onto a semi-submersible barge through a plurality of trolleys, wherein the length direction of the immersed tube is a forward direction thereof, the length direction of the immersed tube is perpendicular to the forward direction of the semi-submersible barge, and depth of immersion of the semi-submersible barge is smallerthan or equal to 3m; and S30, transporting the immersed tube to an immersed tube diving region through the semi-submersible barge, adopting an engineering barrage to pull and position the immersed tube, and adopting a hydraulic crimping method to accomplish underwater butt-joint of adjacent two immersed tubes. The tunnel construction method can effectively simplify barging mounting operation of the immersed tube, reduces construction difficulty, improves operation efficiency, is convenient for quality control of the immersed tube, and ensures tunnel construction quality.

Description

technical field [0001] The invention belongs to the technical field of immersed pipe engineering, and in particular relates to a construction method of a short pipe section immersed pipe tunnel. Background technique [0002] The immersed tubes in the prior art have corresponding specifications and standards for their cross-sectional shapes and sizes, and the commonly used immersed tubes are about 100m in length. Due to their relatively long lengths, during the construction of immersed tube tunnels, the number of tunnels used can be reduced. The number of pipe sections of the immersed tube can effectively reduce the connection nodes between the immersed tubes and reduce the risk of leakage; however, there are the following defects in this structure: [0003] 1. The length of the immersed tube is too long, which makes the weight of the immersed tube very large. Usually, the dry dock method is used for floating towing, which has high requirements for the towing water depth and ...

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Problems solved by technology

[0003] 1. The length of the immersed tube is too long, which makes the weight of the immersed tube very large. Usually, the dry dock method is used for floating towing, which has high requirements for the towing water depth and dry dock site selection; if the semi-submerged barge is used to transport the immersed tube Barge boarding is difficult and risky, and requires a dedicated large-scale semi-submersible barge, which has high requirements for semi-submersible barges, and is difficult to transport in shallow water;

[0004] 2. Due to the large length and volume of the immersed tube itself, it needs to occupy a large space when prefabricating or pouring the immersed tube, and requires a high continuous supply capacity of concrete, and the large-volume immersed tube is easy to crack, resulting in During the operation period, the tunnel leaked, and the later maintenance was very troublesome

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