Pretreatment method of multiple water burst points in water-enriched zone tunnel section
A water gushing point and water-rich technology, applied in water conservancy projects, hydropower, hydropower stations, etc., can solve problems such as poor grouting effect and inability to form an anti-seepage circle, and achieve the effect of simple on-site construction, good effect and short cycle
Active Publication Date: 2017-06-06
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology
[0003] In the process of collecting water points, affected by the inrush water pressure (external pressure), the final grouting effect near one or two water points is poor, and an effective anti-seepage circle cannot be formed
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Embodiment Construction
[0012] Such as figure 1 As shown, this embodiment is based on the previous treatment of water gushing points, combined with the actual project to provide a method for the pre-treatment of multiple water gushing points in the tunnel section of the underground water-rich zone. # It has been applied during the pre-treatment of water gushing points in caves.
[0013] During the excavation process of the underground tunnel 1 in the water-rich zone, the groundwater will gushes out from multiple points. Long-term operation is safe, and the water gushing point is grouted. The specific construction method is as follows:
[0014] a. When a water gushing point appears during the excavation of the tunnel section in the water-rich zone of underground tunnel 1, the grouting treatment for tunnel section B in the water-rich zone should be carried out first to form an effective anti-seepage circle Ⅰ3-1, so that the external water is concentrated in the water-rich zone Cave section A gushes o...
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The invention relates to a pretreatment method of a plurality of water burst points in a water-enriched zone tunnel section. The pretreatment method aims at reducing the grouting difficulty of the water-enriched zone tunnel section, forming an effective anti-seepage ring, making no additional treatment nearby the water burst points, and providing a forceful foundation guarantee for post treatment on the water burst points. The water-enriched zone tunnel section is provided with a leakage passage and is provided with the water burst points. The pretreatment method comprises the following construction steps: a, when the water burst points appear in an excavation process of the water-enriched zone tunnel section, grouting treatment of a water-enriched zone tunnel section part B is carried out and an anti-seepage ring I is formed; b, a drainage pressure relief hole penetrating through the anti-seepage ring I and communicating with the leakage passage of the water-enriched zone tunnel section is punched in a bottom plate of the water-enriched zone tunnel section part B; c, grouting treatment of a water-enriched zone tunnel section part A is carried out and an anti-seepage ring II is formed, the whole water-enriched zone tunnel section forms a complete anti-seepage ring consisting of the anti-seepage ring I and the anti-seepage ring II; and d, finally, the drainage pressure relief hole is subjected to permanent plugging or pipeline drainage, or is provided with a check valve.
Description
technical field [0001] The invention relates to a pre-treatment method for multiple water gushing points in a tunnel section of an underground rich water belt. Applicable to water conservancy and hydropower projects. Background technique [0002] In water conservancy and hydropower projects, underground tunnels, especially deep-buried tunnels, generally have well-developed groundwater. During excavation of tunnels in water-rich areas, groundwater will gushes out from multiple points. In order to ensure the stability of the surrounding rock of the cavern and the Long-term operation is safe, and the water gushing points are generally treated with grouting. The multiple water points in the water-rich zone are grouped into one or two water points in the order of the side arch first and the bottom plate, so that the water-rich zone forms an effective anti-seepage circle. , the final water point is drained or permanently blocked according to the specific situation. [0003] In t...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E02B9/00E02B9/02
CPCE02B9/00E02B9/02Y02E10/20
Inventor 侯博纪昌知何江
Owner POWERCHINA HUADONG ENG COPORATION LTD