SU1217980A1 - Canal construction method - Google Patents

Description

one

The invention Relates to the technology of earthworks by suction dredges during the construction of canals, collectors and other specialized dredging of a large extent in permeable soils.

The purpose of the invention is to increase the quality and intensity of the executed works by creating stable slopes and reducing construction time.

FIG. 1 shows a plan for building a canal in plan; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one.

The method is carried out as follows.

Previously, along the highway of channel 1, a pioneer trench 2 is laid, through which water is supplied.

Bulldozers arrange irrigated strips 3 6 m wide with laying of soil in the four embankment dams. On the line of intersection of the project section with the earth's surface, the L-5 slot is arranged with, for example, a tractor ripper to a depth of 1 m. Then, the dredgers 6 develop the slot 7 of the channel of channel 1 with the following parameters: L 20 m, L ,, 11 m, L 0.5 m. At a depth of I 1, 8 m, a longitudinal undercut 8 of a temporary slope 9 is made with the help of a jetting jet of a dredger 217980

yes 6. Section 10 of the slot 7 blocks the upper 11 and lower 12 with bridges at a distance of 300 m between them. The water level between the bridges is maintained equal to the water level in the bottom of the dredge using a culvert 13 placed at the bottom of the jumper 11. The valve 14 adjusts the supply of the pulp to the irrigation strips 3 and maintain- the water level in them 0.3-0.4 m deep is constant for 3 days, after which the composing slope the soil (sludge) is saturated with water as due to water infiltration from slot 7, and due to infiltration, in irrigated rows from bands 3.

After that, due to the disassembly of the jumper 12 and its self-flushing, it discharges water into the finished section 15 of channel 1, having previously blocked the opening of the pipe 13 with soil. Water is discharged to the depth of the longitudinal undercut 8. Soil jumper 12 at

25 parsing and self-washing is placed in a pre-designed recess 16.

Due to the rapid discharge of water there is a violation of stability

30 water-sloping slopes 9 and sliding of the soil massif 17 with the volume of 66 m per 1 running meter of the channel into the recess 18 of the slot 7 with the formation of a stable section 19 of the channel 1.

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Editor E. Kopcha

Compiled by M. Morgunov

Tehred O. Niece Proofreader E. Sirohman

1091 / 36Care 642 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, Proektna St., 4

Claims (2)

1. METHOD OF CONSTRUCTION OF A CHANNEL, including the development of a dredger with a recessed cross-section that is equal to the design, undercutting of slopes at a depth, ensuring equality of soil volumes of collapsed slopes and recessing of the channel, arrangement of temporary jumpers along the length of the channel, water saturation within the limits of the width of the collapse zone development of the main excavation and the formation of slopes by the collapse of the soil by intensive discharge of water, characterized in that, in order to improve the quality and intensity of work t due to the formation of stable slopes and reduction of construction time, before developing the main excavation within the collapse zone, irrigation strips are arranged with soil laid from them in the embankment dams, which are located on the side of the main excavation, and longitudinal slots are developed along the channel edges to fix the collapse boundary, and water saturation of the soil within the width of the caving zone is carried out by feeding pulp to irrigation strips during the time necessary for water saturation of the soil, and the water level between the jumper the dredger is kept constant and the intensive discharge of water is carried out to the depth of cutting slopes. 2. The method of pop. ^ characterized in that the supply of pulp ¹ to the irrigation strips is made from the upper part of the pressure pulp line with flow control by a valve.