Comprehensive protecting and treating method of water-containing easily-weathered rock bedding slope

Abstract

The invention provides a comprehensive protecting and treating method of a water-containing easily-weathered rock bedding slope. The method comprises the following steps that 1, positions of bedding joints, water isolating layers, rock crushing zones and water guide channels are explored and determined on site; 2, steps from the first to the Nth are formed in an exploited manner, a water drainageditch is constructed in the bottom of a slope face, water drainage holes are constructed in the slope face, thus water accumulated in the steps is drained away, and a water intercepting ditch is constructed in the slope top; 3, slurry injecting holes are constructed in the slope face to enable the rock crushing zones to be combined into a whole; 4, mixed clay is used for being laid on the slope top, and then grinding is carried out; 5, short anchoring rods are constructed on the slope face, and the method of full-hole slurry injecting is used for anchoring; and 6, concrete is adopted for carrying out net hanging and slope spraying. According to the method, the stability of the slope is improved fundamentally, contact between easily-weathered rocks and atmosphere, sunlight and water is isolated, weathering damage to slope rock mass is prevented, the strength of the rock mass is given into play, the key effect of the water in slope slippage is eliminated, and long-term stability of the slope is improved.

Description

technical field [0001] The invention relates to slope stability control technology, in particular to a comprehensive protection and control method for bedding slopes of water-containing and easily weathered rocks. Background technique [0002] Atmospheric precipitation and groundwater will weaken the strength of the bedding slope with easy weathering rock. , or when the complete rock layer is easily oxidized and weathered after being exposed (such as some granites), it is easy to form a weak interlayer in the above weathered layer or weather rapidly as a whole, and its cohesion and internal friction angle are much lower than the upper and lower rock layers, forming a potential landslide. The required landslide surface (weak surface layer), thus triggering the landslide of the bedding slope of easily weathered rock. [0003] As for the stability control of this kind of slope, they are confused by the integrity of the rock mass when it was just revealed and do not realize the...

AI Technical Summary

Problems solved by technology

[0005] 1. Drain hole drainage scheme: Drill holes on the slope surface toward the construction level inside the slope (the port inside the slope is higher than the water outlet outside the slope surface). Insert porous hard pipes (such as PVC pipes) to release the water contained in the slope body from the pipe; since the state and position of the water contained in the slope are uncertain, the drainage effect of the simple drainage pipe scheme is often not ideal;

[0006] 2. Curtain water blocking (grouting water blocking or underground diaphragm wall and other water blocking schemes): for deep water-bearing and easily weathered rock bedding slopes, the effect of grouting water blocking is poor; firstly, it is because of the diffusion radius of the grout and The verticality of the borehole is uncertain, which causes the continuity of the water blocking curtain formed by grouting to be uncertain, so the effect is poor; secondly, if the formed water blocking curtain has a certain effect, the water head on both sides of the curtain is caused. If the water head is poor, the groundwater will form a strong flow field in the rock formations that are not completely sealed under the pressure of this head difference, further weakening the effect of curtain water blocking; and the underground diaphragm wall scheme, for the depth of more than 100 meters. Bedding slopes with easy-to-weather rocks are difficult to form grooves and expensive;

[0007] 3. Slope protection scheme: Generally, there are two or a combination of engineering slope protection and ecological slope protection; engineering slope protection also has measures such as spray anchor slope protection, net spray slope protection and other measures; due to insufficient research on the internal slip mechanism, separate slope protection Shotcrete cannot guarantee the stability of the slope, and using long anchor cables to reinforce the slope has poor effect and high cost because it does not make full use of the high strength of the rock mass when it is not weathered; ecological slope protection refers to the formation of vegetation on the slope to prevent A gully is formed on the slope surface; since the potential slip surface exists inside the slope, the problem is not fundamentally solved. This solution has little effect and can only prevent water erosion

[0008] The combination of the above three schemes: the combination of the schemes seems to have taken advantage of the advantages of various schemes, but because the mechanism of this type of slope instability is unknown, the cooperation between the methods cannot be comprehensively optimized, and they are still doing their own things. Combining advantages, the treatment of slopes is still not ideal

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