RU2117728C1 - Method for stabilization of earth structure - Google Patents

Abstract

FIELD: construction engineering. SUBSTANCE: method is intended for stabilization of earth structures which are being built or been built already on loose base such as on swampy base. According to method, drilled along earth structure are bore-holes with utilizing of casing pipes. Drilled for each route are at least three rows of bore-holes. Drilling is performed from upper surface of earth structure with driving through its body, layer of peat with embedding into mineral bottom which is underlying beneath layer of peat. Penetration into mineral bottom is by 1.0-1.5 m. Then, successively lowered into bore-holes is working electrode which is connected to electric-pulsing unit. Thereafter bore-holes are filled with hardening electric-conducting material, and determined number of electric discharges are made at level of bore-hole lower part. Casing pipe is lifted together with electrode to upper part of bore-hole, and without removing electrode, hardening electric-conducting material is added by pouring-in. Then, electric charges are performed for second time at level of bore-hole upper part. In result of aforesaid procedure, pileworks are created which combine piles of each row. Layer of underlying material is then placed above them. Application of aforesaid method ensures reduction of labour and material expenses, improves quality of stabilization, reduces values of elastic vibrations of earth structure at any steepness of slopes, prolongs service life of stabilized earth structure. EFFECT: higher efficiency. 2 dwg

Description

 The invention relates to the field of construction, including transport, road and hydraulic engineering and can be used to strengthen earthworks for various purposes, including embankments of subgrade, dams, slopes of earthworks intended for the construction of various structures on them, etc. objects erected on weak, including marshy soils.

 There is a method of strengthening earthworks, including conducting workings by drilling from the earth's surface of directional wells and installing cable anchors with downhole locks in them, and the wells are spirally spiraling along the axis of the slip plane, while the spiral diameter is reduced with the penetration depth (see SU copyright certificate , 1717725, CL E 02 D 17/20, 1992).

 The closest to the invention in terms of the problem to be achieved and the result achieved is the method of strengthening the earth structure adopted for the closest analogue, including drilling along the well construction, filling the wells with hardening material and forming pile piles (see, for example, SU copyright certificate, 1601286, class E 02 D 27/36, 1990).

 The disadvantage of this method is the large labor and material costs, long lead times, the inability to perform work on swamps and use for earthworks with slopes of great steepness, insufficient reliability of reinforcement and the fragility of fortified structures, and the known method does not significantly reduce the amplitude of elastic oscillations of the earth a structure intended for the location on it of tracks arising from the movement of rolling stock.

 The objective of the present invention is to reduce labor and material costs, reduce the time of work, increase the reliability of the strengthening and durability of the structures to be strengthened while making it possible to carry out work to strengthen earthworks with slopes of any steepness and in the conditions of construction or strengthening of earthworks located on a weak, including the number of marshy grounds, as well as a decrease in the magnitude of the elastic vibrations of the earthwork to a predetermined standard value.

 The problem is solved due to the fact that in the method of strengthening the earthworks, including drilling along the wells, filling the wells with hardening material and the formation of piles, while strengthening the earthworks, erected or erected in the swamps, the wells are drilled using casing with at least three rows for each path from the upper surface of the earthworks with cutting through the body of the structure and the peat layer and deepening the mineral bottom by 1.0 - 1.5 m into the underlying peat layer, after which they completely lower the working electrode, which is connected to the electric pulse installation, fill the wells with hardening conductive material and produce a specified number of electrical discharges at the level of the lower part of the well, then raise the casing with the electrode to the top of the well and, without removing the electrode, add the hardening conductive material and re-produce at the level of the upper part of the well a predetermined number of electrical discharges until the formation of unifying piles in each row of grillages, p the top of which is laid a layer underlying material such as crushed stone or sand or gravel.

 The technical result provided by the enumerated set of features is that it is possible to create a rigid pile foundation in the body of the earth structure, erected or erected on a weak foundation, the ends of the piles of which are embedded in the mineral bottom, which ensures increased durability of the reinforced structures, reliability strengthening, as well as reducing labor and material consumption, the timing of the work that is possible to carry out in the conditions of weak foundations and I earthworks slopes with any steepness.

 The invention is illustrated by drawings, where in Fig.1 shows a reinforced earth structure, cross section, in Fig. 2 - the same in plan.

 The method of strengthening the earthworks 1, erected or erected on a weak peat base 2, is carried out by drilling along the construction of 1 wells 3 using casing / not shown /, and at least three rows of wells are drilled for each path 4 4. Wells 3 drill from the top surface 5 of the earthworks 1 with a slot of its body and peat layer 2 and deepening into the underlying layer of peat 2 the mineral bottom 6 by 1.0 - 1.5 m. A working electrode is successively lowered into the wells (not shown in the drawings), which connect to an electric pulse installation (not shown in the drawings), then fill the wells with hardening conductive material and produce a predetermined number of electrical discharges at the bottom of the wells, after which the casing with the electrode is lifted to the top of the well, and, without removing the electrode, add the hardening conductive material and re-produce at the level of the upper part of the well a predetermined number of electrical discharges until the piles 7 obtained in the wells are combined in each row of grillages 8, p over which they lay a layer of underlying material 9 such as crushed stone or sand, or gravel.

Claims (1)

 A method of strengthening an earth structure, including drilling along the construction of wells, filling wells with hardening material and forming pile piles, characterized in that when strengthening the earth structure erected or erected in swamps, wells are drilled using casing pipes in at least three rows for each path with the upper surface of the earthworks with cutting through the body of the structure and the peat layer and deepening the mineral bottom by 1.0 - 1.5 m into the underlying peat layer, after which it is successively lowered into the wells they use a working electrode, which is connected to an electric pulse installation, fill the wells with hardening conductive material and produce a predetermined number of electrical discharges at the level of the lower part of the well, after which the casing with the electrode is lifted to the top of the well and, without removing the electrode, add the hardening conductive material and repeatedly produce at the level of the upper part of the well a predetermined number of electrical discharges until the formation of unifying piles in each row of grillages, over which lay a layer of underlying material such as crushed stone, or sand, or gravel.

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