SU1608299A1 - Method of building earth structure on soft foundation - Google Patents

Abstract

The invention relates to construction and is intended for the construction of various embankments on a weak foundation. The goal is to reduce the cost of construction. To do this, first pour a layer of lightweight granular filler. Over the filler stack reinforcing elements in the form of a grid. The mesh size is larger than particles of washed soil and smaller than filler granules. After tensioning, the nets are attached at the edges to the dams of the downward slope, and in the middle to the underlying array. Then over the nets they wash the soil. In the next layer, the operations are repeated. 1 hp f-ly, 6 ill.

Description

The invention relates to the construction and can be used in the construction of various embankments on a weak foundation.

The purpose of the invention is to reduce the cost of construction.

FIG. 1-5 schematically show the sequence of technological operations during the construction of the earthworks; in fig. 6 - scheme of alluvium soil.

The embankment contains reinforcing grids 1, prepared base 2, dams 3 along the dike. Lightweight granules 4, washable soil 5, fasteners 6 and slurry pipe 7.

The method is carried out as follows.

The entire structure, based on the specific conditions of construction, is divided into gates. Then, along the outer boundaries of the inlets, the dams 3 of the associated dumping (Fig. 1) are arranged, inside which a layer of lightweight granular aggregate 4 is filled (Fig. 2). Next, over the layer of filler are placed ar. Mowing grids 1 (Fig. 3), which after tension are attached using fastening elements 6 (Fig. 4), at the edges - to the dams 3 of the diking, and in the middle - to the underlying array ( for the first layer, this prepared base 2). Then, by any known method, the soil is washed all over the reinforcing grids (Fig. 5). In the next layer, the operations are repeated.

The tensioning of the reinforcing meshes can be performed by any known method, for example manually, and metal brackets, for example, can be used as fasteners.

05

About 00

to

with

with

The thickness of the washed layer and the distance between the fasteners depend mainly on the features of the erected structure, type and characteristics of the filler material and, in each case, are determined by conducting a test wash.

i In general, the layers of composite I mixture can be moved by layers of washed or filled soil without light I filler, and the distance between reinforcing seams can be greater than the thickness of the washable layer, after finishing the washout: the next layer is reinforced the grids need I be removed, and in the next layer repeat all the I operations described above.

In the general case, the maximum size of lightweight aggregate granules can be arbitrary; however, when using I standard calculation methods, it should be limited as n for soil particles with a diameter of 150 mm:

The percentage of filler (by weight) is determined by calculation from the condition of ensuring the permissible loads on the base.

Claims (2)

1. A method of constructing an earth structure on a weak foundation, including dumping a layer of light granular The minimum size of the granules is determined by et-25 of the filler and soil by layers and by the increased stability of the structure by reinforcing elements, characterized in that, in order to reduce the cost of construction, the soil is placed hydraulically by washing it between lightweight aggregate granules, while before the soil is washed onto a lightweight granular aggregate, reinforcing elements are laid in the form of a grid with a cell size larger than the particles of washed soil and less than the specified aggregate . 2. A method according to Claim 1, characterized in that prior to the washing of the soil, the reinforcing meshes are attached to the array below the grid-coated layer.  minimum diameter of granules filler, mm; Lmax - Maximum Hole Size grids, mm The minimum particle size of the soil is not limited, and the maximum should freely pass through the holes in the segment, i.e. etc .Ymax dc /; MHH, particle size P where DMBKC is the maximum t soil, mm; Bore - minimum hole size grids, mm 5 Considering that when the pulp is fed, the lightweight filler pops up within the washed layer, the elements attaching the mesh should be buried below the layer created by an amount preventing QI pulling them out. The length of the submerged section can be determined by calculation. Expanded polystyrene, expanded clay and other materials possessing sufficient mechanical strength, lightness and a long 5th eternity can be used as a filler. The percentage of filler (by weight) is determined by calculation from the condition of ensuring the permissible loads on the base. Invention Formula X -777-4 /// /// /// FI8.1 /// /// /// /// 77 / //// / 7. :; .. / 7 // //// //// //// //// //// //// //// //// hr1 . SJ-R on F . :; Q4g ocpQg- So OQ / x / x lsh / //// //// //// //// / y / 7 //////. FIG. five / gt% ОооQoO о сГОПО О о .r-: //// //// //// //// //// //// //// //// l SchigM X five X 1-T-H) . /// 7/7 // /// U // 7 / /// 7 //// /// 5 ( -%: -%; ° /// 7 //// /// Fi.2.6