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Tunnel ahead and station following underground excavation station duct piece dismantling construction method and duct piece dismantling tool adopted by same

A technology for segment dismantling and construction method, applied in tunnels, tunnel lining, shaft equipment and other directions, can solve the problems of non-reuse, large operation risk of segment removal construction method, segment damage, etc., so as to reduce the impact of shield tunneling process. , Avoid the risk of dismantling the segment, and the effect of non-destructive dismantling

Pending Publication Date: 2020-11-27
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a construction method for dismantling the segment of the station in the underground excavation of the tunnel first and then the segment dismantling tool used in order to solve the problem that the existing segment dismantling construction method has high operation risk and the dismantling of the dismantled pipe. The technical problem that the piece is destroyed and cannot be reused

Method used

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  • Tunnel ahead and station following underground excavation station duct piece dismantling construction method and duct piece dismantling tool adopted by same
  • Tunnel ahead and station following underground excavation station duct piece dismantling construction method and duct piece dismantling tool adopted by same
  • Tunnel ahead and station following underground excavation station duct piece dismantling construction method and duct piece dismantling tool adopted by same

Examples

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Effect test

Embodiment 1

[0033] Embodiment 1: A construction method for dismantling station segments in underground excavation of tunnels first, see Figure 1-3 , including the following steps:

[0034] (1) Full ring grouting of segment 1 at interface position

[0035] In order to prevent the back of the segment 1 at the interface from being filled tightly and to prevent mud and water gushing during dismantling, a double-liquid grouting machine is specially used to make closed rings for 3 consecutive rings at the segment 1 at the interface between the station and the shield section, and inject double grout. In order to prevent abnormalities when the segments are removed. The cement slurry ratio is cement slurry: water glass = 1:1, the grouting sequence is from bottom to top, staggered hole grouting, and the grouting pressure and grouting amount are strictly controlled during the grouting process to prevent segment misalignment, damaged.

[0036] (2) Segment 1 bracket reinforcement at the interface...

Embodiment 2

[0041] Embodiment 2: A construction method for dismantling station segments by excavating tunnels first and then excavating stations, see Figure 5 , and the difference from Example 1 is that: in the segment removal step, a Φ80mm hole is reserved at the corresponding position below the middle plate during construction, and the reserved hole 4 can also be used as a feeding hole for the later rail top air duct construction. Use the reserved hole 4 to install the hook, and use the reverse chain to remove the segments one by one. When the segments are removed, they are supported by temporary supports in the tunnel.

Embodiment 3

[0042] Embodiment 3: A kind of tooling for dismantling the segment of the tunnel excavated first and then the station, see Figure 6 , including installation machine 9 and front trailer frame 10. The installation machine 9 is provided with a hydraulic pump station, which controls the installation machine to walk and rotate 360 ​​degrees around. The invention is to remove the segment mechanically, and the remote control device of the segment installation machine can be used to realize the remote removal of the segment, avoiding the risk of man-made removal of the segment.

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Abstract

The invention discloses a tunnel ahead and station following underground excavation station duct piece dismantling construction method and a duct piece dismantling tool adopted by the same, and aims to solve the technical problems that the existing duct piece dismantling construction method is large in operating risk and the dismantled duct piece is damaged and cannot be repeatedly used. The tunnel ahead and station following underground excavation station duct piece dismantling construction method comprises the following steps: 1, carrying out full-ring grouting on the duct piece at a port position; 2, reinforcing the duct piece at the port position; and 3, after excavating earthwork on the top of the tunnel, utilizing the duct piece dismantling tool to dismantle the duct piece at the port position. The duct piece dismantling tool comprises a trailer frame, a duct piece assembling machine and an assembling machine power system. The duct piece dismantling tool does not need to damage the duct piece, slowly dismantles the duct piece through the assembling machine after dismantling a duct piece bolt, transports the duct piece to a duct piece trolley, and does not damage the duct piece when the duct piece is dismantled in sequence to avoid damage to the duct piece.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method for dismantling segment segments of underground excavated stations after tunneling first and a segment removal tool used therefor. Background technique [0002] In order to reduce the impact of urban subway station progress on the construction progress of shield tunneling sections, most shield tunneling sections adopt the construction method of tunneling first and then stations. After the shield construction is passed, the excavation of the negative second floor structure of the station needs to remove the shield segment, because the shield segment is located on the platform layer, and the size of a single shield segment (3.8m arc*1.5m*0.3m) And the weight (about 4 tons), the dismantling of the shield segment is one of the most difficult points. [0003] At present, the removal of segments at home and abroad often adopts the method of setting up...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08E21D11/10E21D11/12E21D11/40
CPCE21D11/08E21D11/105E21D11/12E21D11/40
Inventor 何明何列丁枲诏梁广胜李现森文瑞宗太洪代鹏飞陈艺升闫利东
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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