SU1733571A1 - Method of laying drainage pipes in quicksand soil - Google Patents

Abstract

Usage: construction, technology laying drainage rough in the implementation of the pits and the protection of structures from the effects of groundwater. SUMMARY OF THE INVENTION: A drain well is constructed in flowing soil and drainage is performed. Fold over the trench from the well along the axis of laying the drainage pipe. The trench is torn off until the appearance of moist soil. The walls of the trench are secured by placing the enclosing element in the trench and then removing it. The soil is removed before the element is lowered to the depth of the drainage pipes. Put the drainage pipe, on the end of which install the valve. Sleep drainage layer. The trench is filled up with soil, while the barrier element is removed after it is filled with soil.

Description

SP

with

The invention relates to the construction, in particular to the laying of drainage pipes during the drainage of pits and the protection of structures from the effects of groundwater.

The invention is a reduction in labor costs.

The laying of drainage pipes in floating soils is carried out as follows.

In a floating ground, a drop well is constructed and drainage is carried out. After that, the trench is torn off from the well along the axis of the drainage pipe laying until the appearance of wet soil. When the trench is torn off, its walls are fixed by placing in it an enclosing element made in the form of a box without top and bottom walls. The soil is removed from the enclosing member before it is lowered to the depth of placement of the drainage pipes. Lay drainage pipes, putting a flap on their end, and

drainage layer. The trench is backfilled, during which the enclosing element is removed from the trench after it is filled with soil.

Example. Drainage pipes with a diameter of 182 mm and a length of 3.96 m were laid in flowing soil. A water submersible pump hose was immersed in the water collection well, ensuring the pumping of water. Relocatable fencing installed in the trench along the axis of laying the pipe. The fencing device is a rigid three-dimensional structure of two reinforced concrete slabs at the ends connected by steel I-beams, corners, steel strip. The loops for lifting the fence from the ground are selected on the basis of the maximum force when removing the fence from the soil with a threefold safety factor.

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The maximum force during extraction from the soil was 6 tons. The diameter of the reinforcing steel for the loops was 22 mm when used in the construction of I-beam No. 24, corners 90 x 65 x 4 and 45 x 4, 50 mm wider than the outer diameter in the end wall pipe and to a height of the sum of the diameter of the pipe, the height of the drainage layer under the pipe and 250 mm to ensure soil retention in the lower part of the fence from its possible passage under the knife, welded to the lower part of the structure to facilitate the deepening of the fence in the group nt When the fencing device is immersed, in order to accelerate its immersion in the soil, periodically, after several cycles of excavation of the soil from the fencing tank, additional loading is made with an excavator bucket. Kozsh alternately installed on the corners of the fence and transmit the force of the working body of the excavator through an I-beam and reinforced concrete ends on the knife part. After installing the fencing device in the trench at the depth of the drainage pipe laying, the sand and gravel mixture was poured into the device tank and the pipe was laid with the end into the recess. At the end of the bell pipe put burlap and fastened it to the pipe with soft wire. Sacking (matting) in this case acts as a damper to prevent soil from getting inside the pipe. The burlap is removed immediately prior to docking with a subsequent pipe. After that, the excavator bucket covered the soil in the container of the protective device to the top; put the loops on the crane slings and

took out the floating fence from the ground. Then the operation was repeated, setting the fencing device in the trench along the road.

The application of the proposed method makes it possible to refuse all types of fastening trenches in the construction of gas pipelines, water mains and is particularly effective in the construction of sewage and

drainage in floating soils. The use of the method eliminates the use of drainage systems in the drainage of floating soils, which significantly reduces capital costs, labor intensity and time for performing drainage works.

Claims (1)

Invention Formula The method of laying drainage pipes in floating soils, including a trench passage, fixing its walls, laying drainage pipes and drainage layers and backfilling the trench, is different: in order to reduce labor costs, a discharge well is constructed before the trench, and drainage is performed , the passage trenches are positioned from the well along the axis of laying the drainage pipes until the appearance of moist soil, fixing The trench walls are led by placing a protecting element in the trench and then excavating the soil before the element is lowered to the depth of drainage pipes, the valve is installed before laying the drainage layers on the end face, and the trench and backfilling element is removed after filling it with soil.