Treatment method for sliding of high slope of fragmented bulk solid on surface layer of deep-layer strong-dumping deformation body

Abstract

The invention discloses a treatment method for sliding of a high slope of fragmented bulk solid on the surface layer of a deep-layer strong-dumping deformation body, and relates to the field of slopeengineering. The technical problem to be solved is to provide a high-safety-risk and short-construction-cycle treatment method for sliding of the high slope. By means of the technical scheme, the treatment method for sliding of the high slope of the fragmented bulk solid on the surface layer of the deep-layer strong-dumping deformation body includes the steps of firstly, performing quick slag filling and reversely pressing the foot of the slope, restraining excessive deformation of the slope, and preventing deep-layer landslide; then, setting slope deformation temporary monitoring points, andconstructing a slope construction road; restraining loose deformation of the top of the slope through fore shaft anchor rods; cutting the slope and reducing the load to eliminate the source of dangeron the top of the slope; and finally, supporting the slope, wherein grouting is performed on broken rock mass on the surface layer of the slope through slope surface anchor rods according to the characteristic that the dumping deformation broken rock soil can be injected so that the loose broken rock can coagulate to have a bearing capacity. The method is suitable for sliding of the slope with thestrong-dumping deformation body on the deep layer and the fragmented bulk solid on the surface layer.

Description

technical field [0001] The invention relates to the field of slope engineering, in particular to a treatment method for high slope landslides. Background technique [0002] Toppling is a type of failure of slopes, which mainly occurs in slopes with anti-dipping layered structures, and is generally concentrated on river bank slopes. The basic types of slope toppling deformation include the following three types: [0003] 1. Slope shallow toppling deformation-destruction, this type of slope toppling refers to the situation that the deformation of the rock mass slope is relatively small, and the rock layer will also topple. The main characteristics of this type of deformation are as follows: [0004] First, this type of deformation generally occurs in places with relatively steep terrain, as well as mountain ridges formed by bank slopes cut by transverse gullies and nearby locations. In the canyons on the east side of the Qinghai-Tibet Plateau, this kind of toppling deformati...

AI Technical Summary

Problems solved by technology

Third, the breaking depth of this type is relatively small, generally between 1m and 30m. After the breaking, the part of the dumped body will collapse, and generally stay in the shallow part of the slope, forming a layered shape, and there will be shallow stability problems.

[0005] 2. Deep toppling deformation-destruction of the slope

Second, the strength of this rock formation is low, and the thickness of a single layer is relatively thin

Second, the upper slope is dumped

The upper part is unsupported due to the increasing deformation of the weak base of the lower part, resulting in a toppling deformation

Third, the deformation of the weak base

[0009] There are following shortcomings in the above-mentioned existing support mode: the first, the support design is unreasonable

The unloading of the slope top increases the height of the slope, expands the scope of land acquisition, and increases the amount of support. Moreover, after the excavation of the slope, the undeformed slope at the top of the slope is further deformed and cracked, forming a new safety hazard

The surface layer of the slope is a loose structure, and the effect of shallow anchoring and spraying support is not good. After the slope is supported by deep support measures such as anchor cables, the deformation and landslide of the slope are restrained, and the rock and soil mass of the slope is not taken as the main Supporting materials are used, and the self-supporting capacity of the rock and soil mass is not fully utilized to support the slope

[0010] Second, poor construction operability

In the collapsed rock and soil body of the collapsed deformed body, the anchor cable construction is easy to jam the drill and collapse the hole, and it is difficult to form a hole

Third, the construction process has high safety risks

Due to the loose structure of the slope, the construction of the anchor cables makes it difficult to form holes and the construction time is long. After the construction disturbs the slope, the slope will be further deformed and slumped

The construction of the retaining wall at the bottom of the slope requires excavation of the slope. Excessive deformation and landslides of the slope will be induced after excavating the lower part of the slope, which poses a high safety risk during the construction process.

Fourth, the project investment is huge

[0011] Due to the lack of understanding of the project builders on the strong toppling deformation, the design support parameters are unreasonable, or the construction site does not follow the design support parameters and construction technical requirements, the phenomenon of slope instability and collapse is very common. It prominently shows the problems of high safety risk of landslide slope construction, long construction period and high project cost

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