Settlement-resistant supporting structure of loess tunnel and construction method thereof

A technology for supporting structures and loess tunnels, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve problems such as affecting the progress of tunnel construction and taking a long time in the processing process, avoiding the shutdown of the tunnel face, controlling tunnel settlement, and improving The effect of carrying capacity

Inactive Publication Date: 2016-08-24
CHINA TIESIJU CIVIL ENG GROUP
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Problems solved by technology

On the one hand, this treatment method takes a long time to process, and on the other hand, it takes a period of stabilizat

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  • Settlement-resistant supporting structure of loess tunnel and construction method thereof
  • Settlement-resistant supporting structure of loess tunnel and construction method thereof

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Example Embodiment

[0025] see figure 1 and figure 2 , in this embodiment, the anti-subsidence support structure of the loess tunnel is to arrange the main tunnel arches 104 at intervals along the longitudinal direction of the tunnel. Connection, at the connection node position between the longitudinal bar 103 and the main hole arch 104, the bottom of the longitudinal bar 103 is provided with a locking foot anchor pipe 102; Shaped steel legs 106 are arranged on the outside of the outer side, and the arch feet of the shaped steel legs 106 and the main hole arch 104 form a "herringbone" character support;

[0026] In specific implementation, the corresponding measures also include: on both sides of the main hole arch 104, the longitudinal rods 103 are spaced along the circumferential direction of the main hole arch 104, and at least two roads are arranged at intervals on each side of the main hole arch 104. The included angle between the medium-sized steel leg 106 of the enlarged arch foot and t...

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Abstract

The invention discloses a settlement-resistant supporting structure of a loess tunnel and a construction method thereof. The settlement-resistant supporting structure of the loess tunnel is characterized in that main tunnel arch frames are connected through longitudinal rods, wherein foot locking anchor pipes are arranged at connecting points between the longitudinal rods and the main tunnel arch frames and are positioned at the bottom parts of the longitudinal rods; sectional steel supporting legs are correspondingly arranged at the outer sides of arch feet at two sides of the main tunnel arch frames; the sectional steel supporting legs and the arch feet of the main tunnel arch frames form inverted Y-shaped supports; supporting cushion steel plates are arranged at the bottom parts of the sectional steel supporting legs and the main tunnel arch frames. According to the settlement-resistant supporting structure of the loess tunnel, the arch feet are enlarged to bear the pressure of surrounding rock together with initial ejected supporting concrete, so as to achieve co-stressing of multi-truss arch frames; the rod system type stressing is replaced by board system type stressing; the prior control measure is particularly suitable for IV-level gravity damping collapse Q3 sandy loess accompanying with geological conditions like shallow burying, bias pressure, high moisture content and low bearing capacity.

Description

technical field [0001] The present invention relates to collapsibility Q 3 Construction methods for controlling tunnel settlement under geological conditions of sandy loess tunnels, more specifically Q 3 The subsidence control method of sandy loess accompanied by geological conditions of shallow burial, partial pressure, high water content and low bearing capacity. Background technique [0002] In engineering construction, in order to ensure that the clearance of the tunnel meets the design requirements, it is often used to increase the reserved settlement of loess tunnels, even 2 to 3 times the reserved settlement of the design, which increases the safety risk of tunnel collapse. The existing control method is "after-the-fact control", which is to add locking anchor pipes, add temporary horizontal braces and vertical braces, and even change the excavation method after excessive tunnel settlement occurs. On the one hand, this processing method takes a long time to process,...

Claims

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Application Information

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IPC IPC(8): E21D11/18E21D11/28E21D11/30
CPCE21D11/18E21D11/183E21D11/28E21D11/30
Inventor 刘芳同邢彪张超陈榜文姜波
Owner CHINA TIESIJU CIVIL ENG GROUP
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