Upper-lower overlapping cross parallel tunnel shield construction method
A construction method, tunnel shielding technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as unfavorable tunnel safety, bias pressure of the lower tunnel, impact of lower tunnel support, etc., and achieve the effect of reducing risks
Active Publication Date: 2019-03-12
CHONGQING UNIV
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Problems solved by technology
[0003] In view of the simultaneous construction of the upper tunnel and the lower tunnel during the construction of the subway, both the upper and lower tunnels face construction risks when the tunnels overlap. If the lower tunnel is constructed first, there will be two superimposed effects on the ground settlement during the construction of the upper tunnel, and due to the excavation and unloading of the upper tunnel, there will be bias in the lower tunnel; during the construction of the upper tunnel, due to the vibration of mechanical equipment, etc. , has a greater impact on the support of the lower tunnel
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[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.
[0024] Taking the planning and design of the rail transit construction of a certain project as an example, Metro Line 1 and Line 2 intersect at the railway station station - Chaoyang Square Station. In order to maximize the convenience of citizens, Chaoyang Square Station and the railway station are designed to be on the same platform In this way, citizens can transfer on the same platform in 8 directions on the left and right lines of Lines 1 and 2 without leaving the station. In the Chaohuo section, there will be four tunnels in the shape of "twisted twists" that meet and overlap at Chaoyang Bridge four times. Specifically, the starting point of the Huochao section is t...
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The invention relates to an upper-lower overlapping cross parallel tunnel shield construction method, belonging to the field of shield construction, which comprises constructing the lower section tunnel of the overlapping tunnel and carrying out synchronous grouting reinforcement and timely top secondary grouting reinforcement of the lower section tunnel. The shield construction method also comprises pre-reinforcing the overlapping section of the lower section tunnel and forming a permanent structure for stably supporting the upper section tunnel construction; constructing the upper section tunnel of the overlapping tunnel, and carrying out synchronous grouting reinforcement of the upper section tunnel, and carrying out synchronous temporary support reinforcement of the lower section tunnel during shield tunneling of the upper section tunnel, and carrying out full-section grouting reinforcement of the overlapping section of the upper section tunnel. The upper-lower overlapping cross parallel tunnel shield construction method can play a good role in reinforcing the upper and lower section tunnels of the overlapping tunnels, and can ensure the overall stability of the overlapping tunnel construction, reduce the risks and reduce the interference to ground traffic and buildings.
Description
technical field [0001] The invention belongs to the technical field of shield tunneling, is suitable for underground engineering construction, and particularly relates to a shield tunnel construction method for overlapping, crossing and parallel tunnels up and down. Background technique [0002] With the rapid development of the national economy, some developed areas in my country have entered the era of large-scale development and utilization of underground space, and the construction of subways will be the focus of urban underground space development in the 21st century in my country. There must be intervals in the construction of urban subway networks The engineering problem of intercrossing tunnels is to set up and down overlapping or intersecting section tunnels. However, to ensure the safety of the construction of such section tunnels is the main problem faced by this type of project. [0003] In view of the simultaneous construction of the upper tunnel and the lower tu...
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IPC IPC(8): E21D9/06E21D11/10E21D11/08
CPCE21D9/06E21D9/0607E21D11/08E21D11/105
Inventor 刘新荣刘东双孟庆军孙涛安宏斌李振勇钟祖良熊飞李栋梁
Owner CHONGQING UNIV