A method for removing negative ring segment in shield tunnel
A technology of negative ring segment and shield hole, which is applied in the field of tunnel construction and shield tunnel construction, which can solve the problems of poor working environment, high degree of danger, and slow construction speed, and achieve the effect of fast construction speed
Active Publication Date: 2017-12-12
YSD RAIL TRANSIT CONSTR CO LTD
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Problems solved by technology
[0003] The problem to be solved by the present invention is to provide a construction method suitable for dismantling the negative ring segment in the limited and narrow space in the cave, and solve the problems of low degree of mechanization, slow construction speed, high degree of danger, and poor working environment in the current construction process
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Embodiment Construction
[0046] Combine below figure 1 , figure 2 and image 3 The present invention will be described in detail.
[0047] according to figure 2 The construction sectional view of the negative ring segment removed from the shield tunnel, the shield tunnel 1, the mining method tunnel 2, the empty push-through concrete guide platform 6, the reaction frame 8, and the reinforced concrete support beam 9 have been completed in the tunnel during construction , The second lining 10 of the tunnel, the positive ring segment 11, the negative ring segment 12, and the construction of the reaction force frame 14 have been constructed. On this basis, the removal of the negative ring segment 12 needs to be completed.
[0048] The removal and installation of the negative ring segment 12 in the shield tunnel is as follows:
[0049] Before the demolition work, do a good job in the preparation of wind and hydropower in the construction process: the wind is high-pressure wind and normal pressure win...
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The invention relates to the field of shield tunnel construction, and discloses a method for removing a negative ring segment in a shield tunnel. Vibrate the connecting bolts (17) of the segment (15) from the clock to the 3 o’clock direction; the working space is sprayed to remove dust; 15) Demolition; dismantling of reinforced concrete blocks and removal of concrete slag; demolition of segment (16) from 3 o'clock to 8 o'clock of the first ring of negative ring segment (12); removal of segment (16) of negative ring segment (12) of the first ring Cleaning and transportation of reinforced concrete slag generated during demolition; cyclic demolition. It solves the problems of low degree of mechanization, slow construction speed, high degree of danger, and large work space in the current construction process, and at the same time meets the work requirements for the removal of negative ring segments in holes with various sections.
Description
technical field [0001] The invention relates to the field of tunnel construction, in particular to the field of shield tunnel construction. Background technique [0002] The removal method of negative ring segment of tunnel shield machine in China is mainly hoisting and removal method. The existing technology adopts the structure above the negative ring segment to install lifting points and hoisting equipment. By setting appropriate lifting points and supporting steel poles, vertically lift the removed connecting bolt segment or segment group to achieve the purpose of removal. For example, "Construction Technology for Assembling and Dismantling Construction of Negative Ring Segment for Subway Shield Originating" written by Yu Jianjun of China Railway No. Structural Negative Ring Segment Demolition and Tunnel Replacement Technology", published in the 12th issue of China Engineering Science Journal in 2010. Due to the narrow distance between the negative ring segment and the...
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IPC IPC(8): E21D11/08E21F5/04
Inventor 张元海黄志毅
Owner YSD RAIL TRANSIT CONSTR CO LTD