SU1567741A1 - Method of stabilization of ground - Google Patents

Abstract

The invention relates to the construction and can be used to prevent deformations and stabilize the land (P) of railways and highways. The goal is to increase the sustainability of the groundwater on thawing permafrost soils under conditions of its long-term operation due to freezing of weak water-saturated soils of base P. For this, the trenches pass to the depth of the target layer in the ground zones of the ground earth. A nonwoven synthetic material is laid along the perimeter of the completed trenches and fixed on the slopes of P. The trenches are covered with rocky soil. At the same time, sketches of rocky soil are poured onto the slopes of the ground road. At the same time, thawed soils freeze for almost one season. Due to the additional thermoregulation in the body of the rocky outline, the freezing of the thawed zone of the base of the earth P. improves.

Description

cl & J J

The invention relates to the construction and can be used to prevent deformations and stabilize the roadbed of railways and roads on subsiding during the thawing of permafrost.

The aim of the invention is to increase the stability of the earth bed on thawing permafrost in conditions of its long-term operation due to freezing.

weak water-saturated grounds of the basis of a cloth.

The drawing shows the implementation of the proposed method.

Under the conditions of high-temperature permafrost, as a result of the construction and subsequent operation of linear earth structures (embankments and excavations) under them, permafrost permafrost soils undergo many-year thawing with the formation of non-through talik zones at the base of the structures, known as the bowl or the thawing bed.

Soils in the bowl (bed) of thawing under the influence of annual excessive moistening with surface and permafrost waters and as a result of seasonal freezing and thawing sharply reduce their strength and deformation characteristics, the transition to an unstable (weak) state. Under the influence of the weight of the structure, the weight and dynamics of the movable load in unstable soils of the base arise areas of plastic shears (currents), located mainly under the slope zones of the structures, which leads to lateral extrusion of weak grants from the thawing bowl. The process of lateral extrusion of soils from under the structure is accompanied by a violation of its overall stability and manifests itself in the form of immersion of the body of the structure into the weak soils of the defrosting bowl and the spreading of the slope blocks (violation of the local stability of the slopes) of the structure. weak soils of the peripheral zones of the thawing bowl. The process of precipitation, which lasts a long time, violates the stability of the earth bed, which creates the danger of train movement and requires considerable labor and material resources for its maintenance.

The method is carried out as follows.

Initially, preparatory work is carried out, which includes the preparation of the territory: a breakdown and consolidation of the trench axis on the ground; Shrub uprooting and preliminary leveling of the territory with a bulldozer.

The main work is starting

freezing of soils of the working layer. Before dumping, sketches 1 from rocky soil pass through trenches 2 in the near-surface zones of the earth bed 3 by layer-by-layer removal of naturally frozen soil layers 4 (this condition is especially necessary in the flooding areas). The trenches are penetrated to the depth of the deeper layer (from the lower side to the upper side with a bottom inclination that ensures the outflow of water from the trench and at least 2 ° / oo). “At the same time, the trench width is equal to

five

0

five

1/2 the depth of the thawed zone of the ground zone of the earth bed 3.

To protect the rocky aggregate of the trench from colmatage, as well as to reinforce its walls in weak, water-saturated soils around the perimeter of the trenches, synthetic nonwoven material 5 is laid, which is fixed on the slopes of the landbed 3 and on the field side with metal clips.

Trenches 2 are covered with rocky soil at the same time as dumping of draft 1 on the slopes of the earth bed 3 of dump cars 6 to form structure 7.

The development of a trench in the primitive zone of the earth bed and the laying of synthetic non-woven material around the perimeter of the trunk allows the thawed soils of this zone to be frozen for almost one season, which prevents the ground water-saturated soils from being squeezed out and thereby eliminates the precipitation of the earth bed and provides its resilience.

Filling the trench simultaneously with dumping the sketches on the slopes of the earth bed with fractional rocky soil improves the freezing of the thawed base zone of the earth bed due to additional thermoregulation in the rock body, to ensure the stability of the slope parts and the earth bed as a whole.

The advantage of this method is also its application on permafrost soils of any degree of subsidence and in conditions of long-term operation of the earth bed, the formation of thawing bowls and in conditions of developing thermokarst.

Claims (1)

Invention Formula The method of stabilization of the earth bed, including dumping rock sketches onto the slopes of the earth bed, is different from the fact that, in order to increase the stability of the earth bed by от. hardening permafrost soils under conditions of its long-term operation due to freezing of weak water-saturated soils of the base of the canvas, before dumping sketches in the subsurface zones of the earth bed pass trenches to the depth of the concrete layer; Editor I.Gorvat Compiled by M.Gradusov Tehred L. Serdshkova Order 1308 Circulation 541 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 There is no certain material around the perimeter of the trenches that have been completed, securing it on the slopes of the canvas, and the trenches are covered with rocky soil. 4 4 Proofreader O. Kravtsov Subscription