(1) Eliminate or reduce water hazards.
A. Drainage of surface water: Drainage of surface water is an indispensable auxiliary measure for landslide control and should be the first and long-term measure. Its purpose is to intercept and divert surface water outside the landslide area and prevent surface water from flowing into the landslide area; Or drain the rainwater and spring water in the landslide area as soon as possible to prevent rainwater and spring water from entering the landslide body. The main engineering measures are: setting intercepting ditch outside the landslide; Surface water drains on landslides; Spring water diversion project; Do a good job in greening the landslide area.
B. Drain groundwater: For groundwater, it can be drained but not blocked. Its main engineering measures are:
Blind intercepting ditch is used to intercept and extract groundwater around landslide area;
Supporting blind ditch has both drainage and supporting functions;
The inclined hole group uses nearly horizontal drilling holes to extract groundwater.
In addition, there are blind holes, permeable pipes, vertical drilling and other engineering measures to eliminate groundwater in landslides.
C. In order to prevent the river and reservoir water from scouring the toe of the landslide, the main engineering measures include: building a "groin" in the area where the upstream of the landslide is seriously scoured, so that the mainstream will shift to the other side; In order to prevent the soil at the foot of the slope from being washed away by the river, riprap, gabion and reinforced concrete block pipe should be laid at the front edge of the landslide.
(2) Change the landslide form and set up anti-slide buildings.
A. Slope cutting and weight reduction: it is often used to deal with the sliding body in the state of "top-heavy" and without reliable anti-sliding section in front, so as to improve the shape of the sliding body, reduce the center of gravity, and thus improve the stability of the sliding body.
B. Construction of retaining engineering: For the landslide that slides due to the loss of support or the landslide whose landslide bed is steep and may slide rapidly, the method of retaining engineering can increase the gravity balance condition of the landslide and make the landslide recover quickly. The types of retaining structures are: anti-talc piles, anti-slide piles, anti-slide retaining walls and so on.
C. Improving the geotechnical properties of the sliding zone: generally, physical and chemical methods such as roasting and blasting grouting are used to control the landslide.
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