Underground folding start method for assorted trolleys after shielding
A post-matching and folding technology, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., can solve the problems of unfavorable winter start, large ground occupation, high cost, etc., and achieve small debugging range, small impact, and high disassembly times little effect
Active Publication Date: 2015-06-03
CHINA RAILWAY 12TH BUREAU GRP +1
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Problems solved by technology
[0003] In order to solve the problems that the conventional split starting process of lowering the supporting trolleys behind the existing shield machine is adopted, which has the problems of large ground occupation, long cycle, high cost, and unfavorable starting in winter, the present invention provides a Downhole Folding Launching Method of Supporting Trolley after Shield Tunneling
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[0020] The specific implementation manner of the present invention will be further described in conjunction with the following engineering examples.
[0021] Project Overview
[0022] The main project contents of the first bid section of the East Main Canal of the supporting project of the South-to-North Water Diversion Project in Beijing include shield tunnels and secondary linings of 3974.39m, 7 exhaust valve wells (No. 1-7), 2 shield tunnel originating and receiving wells, 1 shield receiving shaft, 1 emptying valve shaft and 3 secondary lining construction shafts. According to the design, the length of the 2# shield starting and receiving shaft of this project is 49.6m, the width of the wellhead is 14m, and the width of the supporting trolley shaft is 7.6m (after excavation to 8.5m). After the shield machine started from the 2# launch shaft, it excavated from east to west, and was hoisted out to the 1# shield launch and receiving shaft.
[0023] The project uses the...
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The invention relates to a shield starting technology, specifically a folding starting method for supporting trolleys in the well after shield tunneling, which solves the problems of large ground occupation, long cycle and high cost in the existing method of using joint-by-section lowering and separate starting technology. , It is not conducive to starting in winter and other issues, including after the installation of No. 1 and No. 2 trolleys is completed, No. 3 and No. 4 trolleys are disassembled on the ground and hoisted on the left and right sides of No. 1 and No. 2 trolleys respectively; Stop in front of the reaction frame, move No. 3 trolley to the rear of No. 2 trolley, move No. 4 trolley to the left and right sides of No. 3 trolley; The left and right frames of the machine move backward to the rear of No. 3 trolley. After the shield machine continues to excavate a trolley space, No. 5 and No. 6 trolleys are hoisted and lowered one after another to connect with No. 4 trolley. Complete underground starting is realized, with simple operation, less disassembly and assembly times, small commissioning range, and little impact on the excavation of the starting section, which is conducive to effectively avoiding safety risks in the starting section.
Description
technical field [0001] The invention relates to a shield launching technology, in particular to an underground folding launching method of a matching trolley behind the shield. Background technique [0002] With the development of urbanization, shield construction is more and more widely used in the construction of municipal projects such as urban subways, water diversion projects, and power cable trenches due to its advantages of safety, speed, environmental protection, high degree of mechanization, and low labor intensity. middle. However, due to the constraints of many conditions such as dense urban buildings, the ground construction site that can be provided is often relatively narrow, and the originating shaft is relatively short. The control and other pipelines are extended more than 130 meters from the ground to the shield part of the underground, and the conventional split starting process is that the supporting trolleys are lowered section by section as the shield...
Claims
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IPC IPC(8): E21D9/06
Inventor 申智杰王毅军雷军李宗盛吴淼邵海超
Owner CHINA RAILWAY 12TH BUREAU GRP