The method of dealing with the deep weathering pocket of dam foundation
A weathering and dam foundation technology, which is applied in the repair of infrastructure, soil protection, infrastructure engineering, etc., can solve the problems of high cost, complicated construction design process of consolidation method, and difficulty in achieving the ideal treatment effect of weathering capsules. Low, good development and application prospects, low difficulty effect
Active Publication Date: 2020-12-08
YELLOW RIVER ENG CONSULTING
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Problems solved by technology
The consolidation method can achieve good results in the treatment of dam foundation joint rock mass, etc., but it is often difficult to achieve the ideal treatment effect for the weathering pocket, and the construction design process of the consolidation method is complicated and the cost is high
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[0020] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the scope of protection of the present invention is not limited to the following Described embodiment.
[0021] Such as Figure 1-3 As shown, the method for processing the deep weathering pocket of the dam foundation according to the present invention comprises the following steps:
[0022] The first step is to use a drilling rig to drill a sand discharge hole 1 and four water injection holes 2 on the dam foundation as a group, and multiple groups can be drilled according to the actual size of the weathering pocket 3; the sand discharge hole 1 and the water injection hole 2 are drilled to the weathering pocket 3 At the top of the top, four water injection holes 2 are...
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The invention discloses a method for treating a deep weathering bag of a dam foundation. The method for treating the deep weathering bag of the dam foundation comprises the following steps that firstly, sand discharging holes and water injection holes are drilled in the dam foundation till the holes reach the top of the weathering bag; secondly, casing pipes reaching the bottoms of the sand discharging holes and the water injection holes are arranged in the sand discharging holes and the water injection holes; thirdly, an air inlet pipe reaching the top of the weathering bag is arranged in thecasing pipe in each sand discharging hole, so that a sand discharging channel is formed between the inner wall of the casing pipe and the outer wall of the air inlet pipe; fourthly, water is injectedinto the water injection holes till the water level in the water injection holes is higher than the top of the weathering bag, and air is supplied into the air inlet pipes at the same time, so that asand layer, located below the sand discharging holes, of the weathering bag is discharged out of the sand discharging holes; fifthly, the casing pipes and the air inlet pipes in the sand dischargingholes sink, so that sand continues to be discharged till reaching the bottom of the weathering bag; sixthly, when sand in one sand discharging hole is discharged, steps 4-6 are repeated; seventh, concrete is injected into a cavity formed after the weathering bag is treated through the sand discharging holes and the water injection holes; and eighthly, consolidation grouting is conducted on the topand bottom of the weathering bag. The method has the advantages that the construction method is simple, the difficulty is low, and the cost is low.
Description
technical field [0001] The invention relates to a dam foundation reinforcement method in water conservancy engineering construction, in particular to a method for treating deep weathering pockets of a dam foundation. Background technique [0002] Weathering pocket is a common geological phenomenon developed in granite. It has the characteristics of low strength and large deformation. When used as a dam foundation, it is easy to cause leakage, deformation and damage of the dam foundation. With the development of the economy, it is inevitable to encounter the geological phenomenon of weathering pockets in the construction of granite areas. Therefore, the weathering pockets must be treated to meet the design strength and anti-seepage requirements. At present, the treatment methods for the weathering pockets mainly include: 1. Excavation method: the excavation method is to excavate all the weathering pockets and then backfill the concrete; The construction cost of the weatherin...
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IPC IPC(8): E02D37/00E02D27/40E02D3/12
CPCE02D3/12E02D27/40E02D37/00E02D2250/003
Inventor 王磊黄伟谢承平段世超田乐刘军杨永叶马若龙宋海印
Owner YELLOW RIVER ENG CONSULTING