THE STRAIN-STRESS DISTRIBUTION MODEL ENGINEERING OF THE SYSTEM ?SOILCEMENT GROUND WATER CUTOFF OF SLUDGE PIT ? GROUND BASE?Journal: Academic Journal "Industrial Machine Building, Civil Engineering" (Vol.3, No. 45)
Publication Date: 2015-12-25
Authors : Zotcenko N.; Tymofieieva K.;
Page : 226-233
Keywords : sludge pit; waterproof; soilcement; watertight screen; strain-stress distribution.;
During the construction and operation of oil and gas wells accompanied by the formation of a large number of liquid waste. For environmental waste from drilling oil and gas wells to need insulate and neutralize. Waste collected in the sludge pits or in containers for further disposal. Sludge pits for its effectiveness must have reliable waterproofing. The article deals with the design of the barn with waterproofing slurry trench walls soilcement elements in two rows, made by drill-mixing technology without removing the soil that form ground water cut off type ?wall in soil? to the impermeable waterproofing layer without the bottom of the pit. Laboratory studies have shown soilcement its high water resistance, which is not less than W6. Experimental laboratory studies corrosive components cuttings on physical and mechanical properties soilcement shown that it is chemically highly resistant material and is reliable for ground water cutoff sludge pits. Today's advances in science can simulate the real processes with the using computer technology. With this aim in solving geotechnic problems often use the finite element method. The specificity of numerical modeling of stress-strain state of the ground is the fact that soils deformed nonlinearly. That dependence is the stress of displacement is a curves. Using the method of finite elements enables the calculation system of ?fence ? soil? to use different models of soil. In the calculation often used of ideal elastic-plastic model with Mohr-Coulomb yield criterion. It is quite schematically describes the behavior of real soil, as it volumetric compression modules and faults is constant. Now to solve problems of the method of finite elements is uses software packages such as Lira, SCAD, Midas and Plaxis. The construction sludge pit trench walls with waterproofing soilcement impervious to the elements without waterproofing layer the bottom of the pit. In order to ensure reliability barn design computational experiment was conducted to determine the strain-stress distribution of system ?soilcement ground water cutoff of sludge pit ? soil foundation?. The analysis of finite element modeling found that the proposed construction ground water cutoff of sludge pit is reliable and provides the necessary serviceability. The analysis of finite element modeling found that the proposed scheme of arrangement fences barns for different geological conditions are reliable and provide necessary their serviceability. In particular, two row elements placing vertical soilcement when they reach impermeable layer stability factor at the excavation stage was kst = 2.5, that less regulation 1.2. Regulatory stability factor is taken as protections for excavation. At the stage of filling the trench cuttings an additional pressure on the bottom and on the walls of the barn, which reduces the shear stress in the construction of his fence.
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