SU1677173A1 - Method for construction of buried water-intake structure - Google Patents

Abstract

The invention relates to hydraulic engineering. W; - invent.i “- reducing costs and reducing construction time. A submerged shell 2 is buried in the soil mass 1 and the trench is excavated under the protection of the thixotropic solution 4. At the coastal bridge 5, the transverse gripper 6 is excavated to the depth of the trench. A pipeline 7 is then laid in the trench, after which, in the extreme part of the trench between the shore bridge 5 and the transverse gripper, a chamber 8 is created by forming an earth dam 9 in the transverse gripping region. The thixotropic solution 4 is passed through the soil dam 9 in the direction from chamber 8 to the trench via pipelines 10, 11 until the pores in the soil dam 9 collate. 3 Il. J

Description

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FIELD OF THE INVENTION The invention relates to hydraulic construction and relates to the construction of a water supply structure.

The purpose of the invention is to reduce costs and reduce construction time

FIG. 1 shows a buried intake structure after digging out a transverse gripper, plan view; in fig. 2 - the same, at the moment of a bypass through the dix of a thixotropic solution, a longitudinal section; in fig. 3 - the same, at the moment of pipeline pushing through the shore bridge, longitudinal section.

The construction method of the buried intake structure according to the invention is implemented as follows.

In a known manner, the submerged shell 2 is immersed in the soil mass 1 and the trench 3 is excavated under the protection of the thixotropic solution 4. At the coastal jumper 5, a cross-grab 6 is excavated to the depth of the trench 3. Then the pipeline 7 is laid in the trench 3, then the extreme part of the trench 3 between the coastal lintel 5 and transverse capture 6 create a chamber

8 through the formation of a soil dam 9 in the transverse nip 6. The presence of the transverse nipple 6 ensures the integrity of the dirt dam 9 Thixotropic solution 4 is passed through the unpaved dam

9 along the direction from chamber 8 to trench 3 via pipelines 10, 11 using a pump 12 until the pores in the earth dam 9 are clogged. Upon reaching the mudding in chamber 8, the thixotropic solution 4 is replaced by water 13 supplied from the reservoir 14 through pipelines 15, 16 using a pump 17. At the same time, water level 13 in chamber 8 is created above the level of thixotropic solution 4 in trench 3, for which a ground bed 18 is arranged around chamber 8. To ensure pressure from water 13 in chamber 8, exceeding pressure with side thixotropic solution 4 in trench 3, keep the ratio

I | -uv2,

where H is the height of the water layer 13 in the chamber 8 m; 7В - density of water, kg / m3; // 2 - the height of the layer of thixotropic solution 4 in trench 3, m; yr - density of thixotropic solution, kg / m3.

After that, the pipeline 7 is forced to be pushed through the coastal bridge 5 from the internal cavity of the buried shell 2 with the help of a jack 19, and this pushing is carried out in cycles, the pipeline 7 is increased after each cycle by the elements 20. After the pipeline 7 is brought back to the reservoir 14, backfilling is performed trench 3.

An example of the use of the invention is the construction of a buried intake structure with the following object characteristics: trench depth 6–8 m; trench width 0.6 m; trench length 50 m; diameter of the pipeline is 400 mm; coast lintel width 6 m; transverse width 2.5 m; chamber length 4 m

Claims (1)

Invention Formula A method for constructing a submerged water intake structure, including the construction of a submerged shell, digging up a trench under the protection of a thixotropic solution, laying a pipeline in a trench, backfilling a trench and taking the pipeline into a reservoir through a shore bridge, characterized in that, in order to reduce costs and reduce construction time, before laying the pipeline at the onshore bridge, the transverse pick-up is excavated to the depth of the trench, and before the pipeline begins to enter the water body in extreme The first part of the trench between the onshore bridge and the transverse pickup creates a chamber by forming a dirt dam in the transverse grab area and bypassing a thixotropic solution through this dam from the chamber to the trench until the pores in the soil of the dam are clogged, and the tixotropic solution is replaced by water in the chamber from the reservoir with the creation at the end of the replacement of the excess of the water level in the chamber above the level of the thixotropic solution in the trench, with the pipeline being withdrawn into the reservoir before the beginning minutes and backfilling the chamber by forcing it through a pro- davlivani coast jumper from the interior of the recessed shell cycles between which is performed periodically capacity pipeline , ( Of /four- - Skx N V N NNN 4NN XV 4N; ,,.; % F. 37I v HCHHH h 4 h 5 / Jjo g