Consolidation grouting method for underground caverns under high external water pressure and hydrodynamic conditions
A technology for consolidating grouting and underground caverns, applied in infrastructure engineering, construction, protection devices, etc., can solve problems such as water inflow, and achieve the effect of reasonable and feasible technology, low cost, and controllable quality.
Active Publication Date: 2022-02-01
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Problems solved by technology
[0007] The invention provides a consolidation grouting method for underground caverns, which solves the problem of a large amount of water gushing from cracks in surrounding rocks in underground caverns under high external pressure conditions, avoids the influence of dynamic water on the consolidation grouting construction, and ensures the construction quality of consolidation grouting
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[0053] The present invention will be further described below by taking the consolidation grouting of the underground sluice chamber of the reconstruction vent tunnel of the Duonuo Hydropower Station in Jiuzhaigou County, Sichuan Province as an example. Under the condition of high external water pressure and dynamic water, the consolidation grouting method of underground caverns adopts the strategy of orderly drainage of deep drainage holes and peripheral sealing and blocking, supplemented by rock surface sealing, for seepage and gushing water. The basic conditions for lining concrete pouring and subsequent consolidation grouting construction, refer to figure 1 with figure 2 , including the following steps:
[0054] S1. Drill deep drainage holes on the rock wall of the underground cavern to conduct concentrated drainage of seepage and gushing water.
[0055] Due to the well-developed fissures in the surrounding rock of the underground sluice chamber, seepage gushing water em...
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The invention discloses a consolidation grouting method for an underground cavern under the condition of high external water pressure and dynamic water, relates to the field of underground engineering, solves the problem of a large amount of water gushing in cracks in the surrounding rock of the underground cavern under the condition of high external pressure, and avoids the impact of dynamic water on the ground. The impact caused by the consolidation grouting construction ensures the quality of the consolidation grouting construction. The technical solution adopted in the present invention is: the underground cavern consolidation grouting method under the condition of high external water pressure and dynamic water, first drill deep drainage holes into the rock mass of the underground cavern, and conduct centralized drainage of seepage and gushing water; Block the water holes in the rock mass of the chamber, and perform water blocking grouting on the water blocking curtain hole section of the water blocking holes to form a water blocking curtain; then block the deep drainage holes; then close the rock face, and then construct lining on the rock face of the underground cavern Concrete to form a consolidation grout cover mass; finally, consolidation grouting is performed on the area between the lining concrete and the water-blocking curtain. The invention is suitable for the consolidation grouting of underground caverns under the condition of high external water pressure and dynamic water.
Description
technical field [0001] The invention relates to the field of underground engineering, in particular to a method for consolidation and grouting of underground caverns under the condition of high external water pressure and dynamic water. Background technique [0002] In the case of sufficient sources of groundwater supply and continuous high groundwater level, the rock cracks in the excavated underground caverns often have large and continuous water gushing. Under such conditions, the consolidation grouting of the rock mass around the underground caverns Construction, after the grouting and drilling is completed, the grouting hole actually becomes a drainage hole, and the water in the hole will not stop. Due to the influence of internal flow water, the grouting quality is difficult to meet the specified requirements. At present, my country's current "Technical Specifications for Cement Grouting Construction of Hydraulic Structures" (DL / T 5148-2012) does not cover the specifi...
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IPC IPC(8): E02D19/06E02D19/18E02D31/00E02D15/00
CPCE02D19/06E02D19/18E02D31/00E02D15/00
Inventor 颉建军李建彬周荣刘宗健唐朝阳胡帅
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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