Construction method for upper and lower cross tunnels different in cross section type
A technology of crossing tunnels and construction methods, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of no construction methods, etc., and achieve the effects of reducing construction space, improving rigidity and stability, and saving space
Inactive Publication Date: 2019-04-16
宁波用躬科技有限公司
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Problems solved by technology
In view of the existing engineering cases, the construction method of shield tunnels with upper and lower intersections has not or failed to fully consider the influence of the intersection section on different structural section types during the construction process
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[0037] Combined with the soft soil stratum in Ningbo area, the present invention proposes a construction method for upper and lower cross shield tunnels of different cross-section types to reduce the structural deformation and force impact of the new tunnel on the existing tunnel, and ensure the tunnel deformation and ground subsidence Safe and controllable. Among them, the two types of shield tunnels with different cross-sections are: the existing single-circular tunnel 1 and the similar rectangular shield tunnel 2; the vertical intersection clear distance of the upper and lower intersection tunnels should be in accordance with the "shield method tunnel and acceptance specification"; When the tunnel passes through the existing shield tunneling method or pipe jacking method underground structure, the vertical clear distance between the two should not be less than 0.5D* (D* is the outer diameter of the tunnel, which is the vertical height of the outer edge of the new or existing...
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The invention discloses a construction method for upper and lower cross tunnels different in cross section type. The method is characterized by comprising the following steps that 1, an annular innertension supporting steel ring is used for conducting in-hole reinforcement on an inner annular face of a single-circle tunnel reinforced concrete pipe sheet in an existing single-circle tunnel; 2, surrounding soil of a newly-built similar rectangular shield tunnel is subjected to full-cross-section grouting reinforcement, according to the influence degree of the periphery on the position of the cross segment of the similar rectangular shield tunnel and the existing single-circle tunnel, a reinforcement area of the similar rectangular shield tunnel is divided, and the strong reinforcement areais reinforced; 3, after grouting slurry is solidified and the strength demand is met, the stress and deformation condition of the upper and lower tunnels continues to be monitored, after stabilization, the annular inner tension supporting steel ring in the existing single-circle tunnel is disassembled, and upper and lower cross tunnel construction is completed. The construction method has the advantages that the whole rigidity of the existing tunnels is conveniently improved, and the construction space in the similar rectangular tunnel is effectively saved.
Description
technical field [0001] The invention relates to a construction method of an up and down intersecting tunnel, in particular to a construction method for an up and down intersecting tunnel of different section types. Background technique [0002] With the development of the economy and the acceleration of urban construction, people have higher and higher requirements for the high efficiency and convenience of transportation; on the other hand, the continuous advancement of the urbanization process has greatly promoted the economic development of the city. At the same time, it will inevitably lead to the tension of construction land and the current situation of traffic congestion. As an important part of urban underground transportation, subway plays a huge role in alleviating traffic congestion, improving urban efficiency, and enhancing the level of urban modernization. In recent years, the domestic subway construction is in a stage of rapid development, the demand for transp...
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Login to View More IPC IPC(8): E21D9/14E21D9/00E21D11/08E21D11/10
CPCE21D9/001E21D9/14E21D11/08E21D11/10
Inventor 董子博肖广良黄毅夏汉庸刘新科徐森陆幸吴彩霞杨磊苗妤
Owner 宁波用躬科技有限公司