SU1733566A1 - Landslide dewatering method - Google Patents

Abstract

Use: strengthening of the soil mass by its drainage, excluding landslide phenomena. Summary of the invention: during hydrogeological surveys, in the drainage zone, the places of entry and distribution of water and the location of aquifer lenses are revealed. At the point of entry, water is injected with a solution of calcium chloride, and places of distribution of water are used as electrodes. The poles of the electrodes are placed in adjacent places of water distribution. During the injection of the calcium chloride solution, it is additionally introduced into the aquifer lenses, each of which is used as one of the additional electrodes. 2 hp f-ly, 2 ill., 1 tab.

Description

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The invention relates to construction, engineering geology, in particular to anti-landslide measures.

The purpose of the invention is to reduce labor costs and material consumption.

FIG. 1 shows a landslide plan with a diagram of water distribution points; in fig. 2 is a section A-A in FIG. one.

The method is carried out as follows.

During hydrogeological surveys in the drainage zone, you can see in the landslide massif the places of water entry and distribution, which can be, for example, landslide cracks 1, as well as the locations of aquifer lenses. Calcium chloride solution is injected into the places where water 2 enters the landslide massif.

electrolyte, before it appears in sources 3 and saturates aquifer lenses 4. Electrodes saturated with this electrolyte form electrodes and connect them to a network of direct electric current, while poles of electrodes are placed in adjacent places where water is distributed. Sources 3 control the change in water flow, which increases as the soil is electro-treated and, after reaching stabilization of the discharge water flow rate, the electro-treatment is stopped. In the process of electrotreatment, the soil enclosed between the saturated solution of CaCIa water distribution sites and aquifer lenses, which are connected to the poles of a source of direct electric current, falls into the field of electric power lines 5 and under their influence 4 CO SP

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By changing its structure, it significantly changes the filtering ability. Thus, the volume of 6 water distribution points in the landslide massif (in the contour of the dashed line in Fig. 2) increases, and a rapid natural drainage of the landslide massif occurs, preventing the development of landslide deformations. This removes excess pore pressure, which often occurs in pinched aquifer lenses.

PRI me R. On a 10m landslide, two water distribution points were discovered, starting from landslide cracks in the head of the landslide, which captured the slip plane and ended with the discharge of water on the slope surface in the form of sources with water consumption of 0.2 l / s each. The length of the water distribution sites in the landslide massif is 100 m, and the distance between them is 6 m.

Launching the CaCIa solution, connecting via short metal nipples of direct current and electrical treatment of the interelectrode array of soil creates an additional volume of water distribution of 100x6x10 m. The single-normal solution increases the conductivity by 1680 times compared to ordinary ground water the place of leakage of such a solution is practically an electrode 100 m long.

To create the same drain by a known method, it will be necessary to install two rows of rod electrodes with a distance between rows of 6 m and an interval between them Hume.

Labor costs and consumption of materials for the known and proposed methods are given in the table. At the same time, the duration of electrical treatment was 3 days. During this time, 10368 liters of water flow from two sources.

The results of calculations by two methods show that the proposed method reduces the labor costs and the consumption of expensive materials.

Claims (3)

1. A method of dewatering a landslide massif, including conducting hydrogeological surveys in the drainage zone, forming electrodes in the array, passing a constant electric current through them until the discharge water flow stabilizes, characterized in that, in order to reduce labor costs and material consumption, during hydrogeological surveys detecting the places of entry and distribution of water and the locations of aquifer lenses, after which the calcium chloride solution is injected into the places where water enters; One hundred times water is used as electrodes. 2. A method according to claim 1, characterized in that during the formation of the electrodes their poles are placed in adjacent places of water distribution. 3. The method according to claim 1, wherein the injection of the calcium chloride solution during the injection of the calcium chloride solution, additional introduction into the aquifer lenses, each of which is used as one of the additional electrodes.