Fixing device and construction method for controlling floating of shield tunnel segments
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A shield tunnel segment and fixing device technology, which is applied in the direction of tunnels, tunnel linings, shaft equipment, etc., can solve the problems of long construction period, short construction period, and low cost, so as to reduce the amount of engineering, improve construction efficiency, and save construction costs Effect
Pending Publication Date: 2018-07-20
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 2ND ENG CO LTD +1
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[0006] The purpose of the present invention is to solve the problem of ground subsidence in the prior art to control the floating of the shield tunnel segment by using precipitation, and at the same time, the control method of using large-area ground grouting has high cost and long construction period, and it cannot be used for shield tunneling. To solve the problem of effectively controlling the floating of tunnel segments, a fixing devic
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Embodiment 1
[0056] Such as Figure 3 ~ Figure 6 As shown, the fixing device used to control the floating of the shield tunnel segment includes a plurality of anti-floating piles 7 arranged in sequence along the route direction of the shield tunnel, and each of the anti-floating piles 7 moves from the top of the tunnel to the One side extends, so that the shield tunnel segment 3 is constrained under the anti-floating pile 7 after installation.
[0057] By setting the anti-floating pile 7 on the route of the shield tunnel, after the shield tunnel passes through the anti-floating pile 7, the distance between the shield tunnel segment 3 and the anti-floating pile 7 is only between the outer diameter of the shield machine and the outer diameter of the segment The distance between the gaps, when the segment comes out of the tail of the shield and before the grout has solidified, the anti-floating pile 7 has a restraining effect on the floating of the segment, and the friction between the anti-f...
Embodiment 2
[0067] The construction method of controlling the floating of the shield tunnel segment, when using the fixing device for controlling the floating of the shield tunnel segment as in embodiment 1 to limit the floating of the segment, proceed according to the following steps:
[0068] a, determine the burial depth of the anti-floating pile 7 and the spacing between each anti-floating pile 7;
[0069] b, making anti-floating pile 7;
[0070] c, make crown beam 8, described crown beam 8 connects each anti-floating pile 7, forms integral anti-floating structure;
[0071] d. The shield tunneling machine passes through the anti-floating piles 7, so that the shield tunnel segments 3 are constrained under the anti-floating piles 7.
[0072] In this embodiment, three anti-floating piles are set, and one crown beam is set. In specific applications, the number of anti-floating piles and crown beams is determined according to the distribution characteristics of engineering mudstone.
[0...
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Abstract
The invention relates to the technical field of shield tunnel construction, in particular to a fixing device and construction method for controlling floating of shield tunnel segments. The fixing device comprises multiple anti-floating piles successively arranged in the shield tunnel route direction. Each anti-floating pile extends towards one side of a tunnel from the upper side of the tunnel inthe radial direction of the tunnel, so that the shield tunnel segments, after being installed, are constrained under the anti-floating piles. The anti-floating piles are arranged on the shield tunnelroute, so that after the shield tunnel penetrates through the anti-floating piles, spacing between the shield tunnel segments and the anti-floating piles is only gap spacing between a shield machine outer diameter and the segment outer diameter. When the segments deviate from a shield tail and before slurries solidify, the anti-floating piles generate binding effects on the floating of the segments. Good binding effects on the shield tunnel segments are formed by using frictional force between the anti-floating piles and the mudstone stratum, so that the floating of the shield tunnel segmentsis controlled. The anti-floating mode is simple and practicable, easy to operate and control, low in cost, short in construction period, and good in application and popularization value.
Description
technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a fixing device and a construction method for controlling the floating of shield tunnel segments. Background technique [0002] With the rapid development of my country's urban subway construction, the shield method has been widely used for its advantages of high efficiency, safety and environmental protection. However, when construction is carried out under the geological conditions of mudstone strata, the problem of shield tunnel segment floating is extremely prominent. Shield tunnel segment floating refers to the influence of geology, groundwater, synchronous slurry and other factors after the segment breaks out of the tail shield. The phenomenon of segment upward displacement, the floating amount can reach 200~300mm if the floating is serious. [0003] The hazards caused by excessive floating amount of shield tunnel segments are mainly as follows: First, t...
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IPC IPC(8): E21D9/08E21D9/14E21D11/08
CPCE21D9/001E21D9/0607E21D9/08E21D9/14E21D11/08
Inventor 雍朗明何旭升张振东张卢学李雪高波李德飞张宗来
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 2ND ENG CO LTD
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