SU1476036A1 - Method of and shell for constructing an embedded hydraulic structure - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to reduce construction costs. Along the contour of the well, a trench 2 is opened, which is filled with a mixture of concrete clay powder with excavated soil. A well is constructed above trench 2 and immersed in trench 2, while the mixture of soil and clay powder 4 is decomposed by introducing water into canals or injectors. Braking is carried out using a support collar consisting of separate segments, the prismatic parts of which with their inclined edges move the ground to the walls of the well, thereby forming a compacted soil core. The shell of the well includes a cylindrical shell with a knife part at the bottom end and a supporting collar. The collar is made of individual segments, provided with restrictive elements, which are made in the form of triangular prisms. 2 with 1 z. P. f-ly, 4 ill.

Description

/ 7 S / s s / / S /

I. S

  JF- V - If-: g - - v

G i I I

; -.;: 4fc -v

  I L -: H-iJJ

 /// Ј ///// // / 77 FM.1

777 ///// /// /// ///

I. S

 V: g - - v

The invention relates to hydrotechnical construction, in particular the construction of structures by the descending method in difficult hydrogeological conditions.

The aim of the invention is to reduce construction costs.

FIG. 1 shows a fragment of a trench and the mixing of the soil removed from it with a bentonite dry mud; in fig. 2 - assembled drain well, ready for immersion; in fig. 3 - top-down wells; in fig. 4 - well bottom at the time of completion of the dive.

The method is carried out as follows.

Along the contour of the future structure, with the help of a grab 1, a ring trench 2 is opened under the protection of hydraulic support, for example, a thixotropic solution with its deepening into a waterproof layer. The soil removed from the trench 2 is fed to the mixing unit 3, where it is moved with dry bentonite clay powder 4. The mixture is stored in a temporary dump 5 located near the work site, and in rainy time the blade 5 is desirable to cover with a canopy to avoid its overwetting.

The next operation is to fill trench 2 with a mixture of soil and bentonite clay powder 4. To obtain a homogeneous mass of the aggregate, it is possible to use deep vibrating.

When trench 2 is full, lining 6 is installed on which the shell of the well 7 is mounted, combining the inner surface of the walls with the inner wall of the trench 2. The outer surface of the walls of the well 7 is placed above the trench so that when immersed the shell is inside the trench 2. When At the upper end of the casing, this is done by a supporting collar of individual segments 8, the lower part of each of which is made in the form of a triangular prism 9 with the inclined side 10 facing the shell of the well 7.

The assembled well 7 is removed from the linings 6 and proceed to the dive as the soil is developed within it using earth-moving equipment 11.

The adjustment of the immersion well 7 is carried out by supplying water under the knife part of the shell of the well 7 either through the channels 12 made in the walls or through the mixing unit 3, periodically recessed under the knife part. The water supplied under the well interacts with particles of bentonite clay powder, expanding their crystal lattice, due to which the antifiltration material filling trench 2 facilitates immersion of the well 7. The local introduction of water into certain zones makes it possible to correct well rolls that occur during immersion. .

The amount of bentonite clay powder introduced into the soil does not exceed 5–15% of the volume of excavated soil, and the amount of water supplied under the knife is from 1 to 8 parts by weight of clay powder, and during the water supply the soil does not erode, but only absorb it. powder

When well 7 approaches the design elevation, segments 8 of the support collar slam into the soil surrounding the well 7 with prisms 9 that move the soil to the walls of the well, thereby creating a compacted core 13 of the soil. As a result, the dive is terminated.

Claims (3)

1. A method of constructing a buried hydraulic structure, including mounting a shell with a blade part having an internal ledge, forming a ring trench around the structure under the protection of a thixotropic solution, deepening the trench into the impermeable layer of soil and filling it with an impervious material in the face and braking at the design mark, characterized in that, in order to reduce construction costs, the inner wall of the trench is combined with the edge of the inner its shoulder of the knife part of the shell, and the mixture prepared at the work site as the impervious material is used from the trench of the soil and dry bentonite clay powder; at the same time, during the submersion of the shell, the counter-absorption material is decompressed by introducing water into it in the area of the knife part of the shell. 2. Method of construction of hydro-technical buried construction pop. 1, characterized in that the braking is carried out by means of a support collar by forming zones of compacted soil under it by moving the latter from the peripheral part of the support collar to the shell. 3. A casing for implementing the method of constructing a hydraulically deepened structure, comprising a cylindrical shell with a blade part at the bottom end and a supporting collar located on its outer side, so that in order to reduce construction costs, the supporting collar is placed at the level of the upper the end of the shell and made in the form of individual segments, provided with bounding elements attached to their lower surface, made in the form of triangular prisms facing an inclined face in the direction of the shell. / LL / 7777 //////// sh 1 J .. l-L-LlV-l-lW-. . ..  //////////////// fy ////// u //////// // b vyy AT four eight u //////// // ЪУ / vyy //. 7Z777 (five. 2 FIG H Fia.Z