An innovative technology for tunnel demolition
A tunnel and process technology, applied in infrastructure engineering, construction, excavation, etc., can solve problems such as inability to guarantee completion, and achieve the effect of rapid demolition work, saving construction period and cost
Active Publication Date: 2022-04-29
CCCC THIRD HARBOR ENG +1
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Problems solved by technology
According to the original construction process: construction of surrounding protection piles, water-stop curtains, precipitation wells, column piles, support installation, dismantling of tunnels, and construction of the main structure, it will not be guaranteed to be completed within the two-month construction period, and it is necessary to find a breakthrough in technology
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[0034] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.
[0035] As shown in the figure, an innovative technology for tunnel demolition described in the present invention is constructed in two parts:
[0036] 1. The open section on the south side
[0037] Due to the shallow open section on the south side and the large construction space, the original SMW pile enclosure structure on the south side of the tunnel was changed to the Lars...
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The invention discloses an innovative technique for dismantling a tunnel. For the open section, the original SMW pile enclosure structure is changed into a Larsen steel sheet pile enclosure structure, and at the same time, the lateral support in the pit is replaced by returning soil outside the enclosure structure, omitting Column pile construction process; for the buried section, the tunnel buried section is divided into a ring-shaped concrete structure with an interval of 6m and a width of 3m, and H-shaped steel is placed in the 6m demolition area to replace the lattice column, and the horizontal steel pipe support is installed. Finally, the 3m ring structure was removed to realize the demolition of the tunnel. The process of opening holes in the top and bottom plates to construct lattice piles was omitted, and multiple sections were constructed in parallel, which greatly improved the demolition efficiency, shortened the construction period and affected the surrounding area. The influence cycle of the building; the cost is reduced, and the environmental pollution caused by the construction of cast-in-situ piles and construction method piles is avoided.
Description
technical field [0001] The invention belongs to the technical field of tunnel dismantling, and in particular relates to an innovative technology for tunnel dismantling. Background technique [0002] In March 2020, it is planned to hold the World Indoor Athletics Championships in Nanjing Youth Olympic Park. It is necessary to build two new tunnels and a new pipe gallery next to it. The project must be completed before the event. It includes the demolition of an original tunnel. On April 18, 2019, the review of the "Special Construction Plan for Demolition of XX Road Tunnel" was completed. Because the construction area belongs to the construction involving the subway, it needs to be reported to the subway department. The filing includes the design plan And the construction plan, all the procedures are cumbersome. As of the beginning of May, the relevant procedures have been completed and the conditions for construction have been completed. [0003] Considering that the flood ...
Claims
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IPC IPC(8): E21F17/00E02D5/04E02D17/04E02D17/20E02D5/28
CPCE21F17/00E02D5/04E02D17/04E02D17/20E02D5/28
Inventor 蔡惠华尹建兵顾晓彬张晓辉徐铁峥
Owner CCCC THIRD HARBOR ENG