Tunnel shield propulsion and inside double-layer road synchronous construction method

Abstract

The invention relates to a method used for synchronously performing tunnel shield thrusting construction and internal double deck road construction, which can perform construction to the internal road of the tunnel when the shield is thrust, and takes prefabricated parts of the well-laid lower deck road as the transportation channel to perform flow production for in-situ casting the upper deck road. The method comprises the following steps: in all the operating areas behind the thrusting shield, the construction working procedures which are arranged in sequence and according to the longitudinal sequence and are synchronously performed are as follows: first, the lower deck rod is laid by adopting the prefabricated parts; second, the structural parts on both sides of the prefabricated parts of the lower deck road are cast; third, in-situ concrete casting construction is performed to the supporting parts of the upper deck road; fourth, in-situ concrete casting construction is performed to the upper deck road. The method performs synchronous construction to the internal road structure by combining the prefabricated parts and the cast-in-situ concrete structure. Therefore, not only the construction period is reduced, but also the construction flexibility and the integrity and the shock resistance of the engineering structure are improved; meanwhile, the influence of the tunnel quality to the structural quality of the internal rod is reduced. The method is especially suitable for the large diameter long distance double-decked tunneling construction.

Description

Technical field: [0001] The invention relates to a tunnel engineering construction method, in particular to a tunnel shield advancement and internal double-layer road synchronous construction method suitable for large-diameter and long-distance tunnel engineering, and belongs to the field of tunnel construction engineering. Background technique: [0002] With the further development of urban underground space and the continuous improvement of the performance of underground engineering materials and equipment, the shield method has been increasingly widely used in the construction of tunnels with larger diameters and longer distances. However, the construction of large-diameter and long-distance tunnels often faces the difficulties of complex construction technology, long construction period, and high construction risks. In order to shorten the construction period, it is necessary to reasonably arrange the tunnel shield advancement and internal structure construction. [0003...

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Problems solved by technology

[0004] However, the synchronous construction method described in the above-mentioned patent has the following disadvantages: ① In this method, the position of the corbels for laying road slabs is predetermined by the ring segment, which limits the construction flexibility of segment manufacturing and assembly, and limits the flexibility of shield tunneling. Axis control and other construction links have adverse effects; ②The upper and lower roads are in the form of prefabricated parts, and their structural integrity and earthquake resistance are poor; ③The construction quality of the tunnel itself has a greater impact on the quality of its internal road structure , there is a high correlation between the two

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