A segment structure suitable for rectangular tunnels and its assembly method
A technology for segments and tunnels, which is applied in the field of segment structures and their assembly, can solve the problems of reduced use space of shield tunnels and reduction of tunnel economic performance indicators, so as to reduce the thickness of segments, avoid uncertainties, and improve The effect of safety reserves
Active Publication Date: 2018-03-02
上海建工地下工程技术有限公司
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Problems solved by technology
The increase in the thickness of the segment will lead to the reduction of the internal use space of the shield tunnel, and the use of too high steel content will reduce the economic performance index of the tunnel
Method used
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Embodiment
[0028] Example: such as figure 1 As shown, this embodiment specifically relates to a segment structure suitable for a large-section rectangular tunnel and an assembly method thereof. The sidewall segment 1, the sidewall segment 5, and the capping segment 3 at the top of the tunnel are composed, and the circumferential assembly surfaces between the segments are connected by straight bolts. In the case of using concrete segments for the above-mentioned segments, it is necessary to increase the thickness of the segments or increase the steel content, and the increase in the thickness of the segments will lead to a decrease in the internal space of the shield tunnel, and too many Stressed reinforcement will reduce the economic performance index of the tunnel. For this reason, in this embodiment, we will cancel the configuration of stressed steel bars in concrete segments, and only arrange structural steel bars, and cover steel plates on five sides of each segment to form a semi-c...
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The invention relates to a rectangular tunnel, particularly relates to a duct piece structure applicable to the rectangular tunnel and an assembling method thereof. Steel plates covering five surfaces of a dust piece are formed into a semi-closed structure, namely, the steel plates cover two end surfaces, bilateral sides and the top surface or the bottom surface of the duct piece. The duct piece structure has the advantages of enabling the steel plates to be tensioned and concrete to be compressed, enabling arrangement of load-bearing reinforcements to be not needed and only needing to arrange constructional reinforcements due reasonable arrangement; reducing the thickness of the duct piece of the rectangular tunnel compared with a concrete duct piece, satisfying a large section rectangular tunnel requirement for load bearing and being beneficial to popularization and application of the rectangular tunnel; satisfying a rectangular shield tunnel requirement for load bearing due to the fact that steel structural joint boxes are arranged at two ends of the duct piece; enabling safety stock of the duct piece structure to be improved and avoiding duct piece tensile region and compressive region distinguishing uncertainty caused by different computing models and analysis parameters due to the fact that transitional structures are arranged between steel structural joint boxes and the concrete.
Description
technical field [0001] The invention relates to a rectangular tunnel, in particular to a segment structure suitable for a rectangular tunnel and an assembly method thereof. Background technique [0002] With the process of urbanization in China, the number of vehicles and the population in cities are increasing, so it is necessary to build more and more underground passages and urban underground expressways to solve or alleviate the "difficulty crossing the streets" of urban residents and vehicle traffic congestion. And other issues. [0003] In 1825, under the Thames River in London, England, the shield method was used for the first time to excavate a road tunnel with a rectangular section of 11.6m×6.4m. However, because the circular section has the advantages of good structural stress, easy assembly, and convenient construction, 99% of shield tunnels in the future will be circular, and reinforced concrete segments will be used. From the perspective of space utilization e...
Claims
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IPC IPC(8): E21D11/40E21D11/04
Inventor 孙魏吴欣之薛勇温竹茵官林星余皝罗鑫孙旻
Owner 上海建工地下工程技术有限公司