SU1689511A1 - Method for thermal consolidation of sand loam - Google Patents

Description

The invention relates to the construction, in particular to the thermal strengthening of sandy soils, and is aimed at increasing their carrying capacity and reducing the duration. The goal is achieved by the fact that in the method, including the formation of a well, its sealing, the introduction into the soil

The invention relates to the construction, in particular to the thermal strengthening of sandy soils.

The purpose of the invention is to increase the carrying capacity and reduce the duration.

The drawing shows a diagram of the method.

Form a well 1 to a depth H, less than the height B of the supports 2 at half the distance A to the outer contour 3. Seal the well 1 with a bolt 4 with a pipe 5 connected by a generator 6 combustible mixtures, a compressor 7 and a supercharger 8 water clay slurry. Then check the entire system for tightness and

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clay suspension, combustion of a combustible mixture in the well, injection of hot gases into the soil and heating of the soil on the external circuit to a predetermined temperature; corresponding to the number of plasticity equal to 10-14, moreover, clays of the mineral group of illites are used as a material for the suspension, and the soil is heated for a time determined from dependence Τ = π · N · K (ϋ ₀ ^{1 2} - Oc ²⁾ / 4a, where H - the depth of the borehole; K - thermogram indicator; ϋο - diameter support; О _с - diameter of the well; and - the burning rate of muddied sandy loam. 1 ill., 1 tab.

pumped into the well 1 suspension with clay particles of the illite group to saturate the soil on the external circuit 3 to plasticity number 10-14, which is fixed by direct sampling through the hole 9. After that, compressed air is supplied to well 1 and dried according to the degree of humidity it is at the border with portable moisture meters to a moisture content equal to the moisture at the rolling edge. Then, combustible mixtures with a temperature below the beginning of sintering sandy loam are burned in the well, i.e. 1050-1 Yu0 ° C, under pressure. The process of heating the soil is carried out for a time determined from the ratio

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_Τ = π · Η. _Κ . ^ Ρ ?, ₀ )

where Η is the depth of the well, m;

К - thermogram indicator: в - diameter of the support, m;

- diameter of duty ratio, m;

a is the burning rate of mudded sandy loam, m ³ / h.

Periodically, through the hole 9, the temperature field is measured by thermocouples with recording devices 10.

Reducing the depth of the well by the value A / 2, less than the height of the support, allows using the bottom of the well, which closes the heat flux and the maximum pressure of the clayey slurry, for clogging and firing.

Π p and me. Thermal strengthening of sandy loam in two supports with a well depth H = 2 m is carried out at the pilot site using the proposed technology. Equipment: compressor B-200, supercharger C-203: capacity for liquid fuel standard 1 m ³ ; moisture meter NIV-2; thermocouples ТХА-ХШ with devices ЭППП-9М2. O ₀ = 1.0 M; Oc = 0.15 m; a = 0.077 m ³ / h For two supports: Κι * 0.5 and Kg = 1. According to formula (1), the duration 30 is 10 and 20 hours respectively.

44.8 and 52.3 kgf / cm, respectively.

Comparison of the data of the proposed method and the known one is given in the table.

Thus, the proposed method reduces the work time by 1.5-3.0 times and increases the bearing capacity of the soil by 1.41.7 times.

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Claims (1)

Claim The method of thermally strengthening the sandy loam is mainly in the form of a support, including the formation of a well, its sealing, the introduction of a clay slurry into the soil, burning the combustible mixture in the well, forcing hot gases into the soil and heating the soil on the outer contour to 15 of a given temperature, , in order to increase the carrying capacity and reduce the duration, after the introduction of the clay suspension into the soil, it is blown with compressed air through the well, and the introduction of the clay suspension is carried out to the degree of saturation soil on the external contour corresponding to the number of plasticity of 10-14, wherein as a material for use sus25 Penzov clay mineral group illites, and heating the ground lead for a time determined from the relationship where N is the depth of the well, m; K - thermogram indicator: ϋο diameter support, m; Oc - well diameter, m; a - burning rate of clogging sandy loam, m ³ / h 40 Indicators The proposed method Famous the way Prop 1 Prop 2 Diameter of support, m one one one Thermogram indicator, K Resistance to shearing fortified 0.5 1.0 1.5 th soil along the outer contour. kgf / cm ² 44.8 52.3 31 The duration of the process T (without • that mudding, soil), h Specific heat consumption Yu 204 thirty on the heating of the mineral soil skeleton, MJ / m ³ 1420 1530 1640 1689511