SU1578265A1 - Sinkable well - Google Patents

Abstract

The invention relates to underground construction and can be used in the construction of buried structures in order to increase the reliability of eliminating the deformations of the surrounding soil under the foundations of a number of standing buildings. Drain pit includes forshakhty 1, walls 2 with knife 3 having a shoulder part 3 and sealing device 5 located above ledge 3. Forshaht 1 is made with a side on the side facing the lowering well with elastic cuff 8 attached by edges to the forshakhty surfaces 1, and a clamping element located in the stratum 6, connected by a pipe 11 to the injection system. The cuff 8 is made with a horizontal fold and diamond-shaped slits. When the well is immersed in the cavity 14 between the ground and the wall 2 of the well, a thixotropic solution is fed through the pipe 15. 3 il.

Description

(21) 4303958 / 23-33

(22) 08.09.87

(46) 07.15.90. Bup. No. 26

(71) All-Union Scientific Research Institute of Hydromechanization, sanitary-technical and special construction work

(72) O. G. Kedrov and G. A. Pridchin

(53) 624.156.8 (088.8)

(56) USSR Copyright Certificate No. 998656, cl. E 02 D 7/00, 1981.

USSR Author's Certificate No. 548686, cl. E 02 D 5/54, 1973.

(54) SUPPORT WALL

(57) The invention relates to underground construction and can be used in the construction of buried structures in order to increase the reliability of excluding deformations of the surrounding soil under the foundations of a number of standing buildings. Drain pit includes forshakhty 1, walls 2 with knife 3 having a shoulder part 3 and sealing device 5 located above ledge 3. Forshaht 1 is made with a side on the side facing the lowering well with elastic cuff 8 attached by edges to the forshakhty surfaces 1, and a clamping element located in the stratum 6, connected by a pipe 11 to the injection system. The cuff 8 is made with a horizontal fold and diamond-shaped slits. When the well is immersed in the cavity 14 between the ground and the wall 2 of the well, a thixotropic solution is fed through the pipe 15. 3 il.

with sЈ

.

315

The invention relates to underground construction and can be used in the construction of buried structures.

The purpose of the invention is to improve the reliability of eliminating deformations of the surrounding soil under the foundations of standing buildings.

FIG. 1 shows a submersible well, disengaged; in fig. 2- node I in FIG. one; FIG. 3 is a view along arrow A in FIG. 2

Drain pit includes forshakhtu 1, walls 2 with knife 3 having a shoulder 3 and 4 located above ledge 3 at the tight fitting device 5. Forshacht 1, with a side 6 facing the drop well, is punctured 6, covered with elastic attached horizontal edges 7 to the forshakhty surfaces 1 with the cuff 8 and the presser element 9 located in the penalty 6 6, the elastic cuff 8 of the front part 1 being made with a horizontal fold and rhomboid vertical slots 10,

The immersion well is immersed as follows.

The forshacht 1 is erected with a penalty 6 and the clamping element 9 is mounted and smears 8. The clamping element 9 in the form of an annular tubular chamber is connected by a pipe 11 to an autonomous injection system. The cuffs 8 with the horizontal edges 7 are attached to the surface of the forshakhta 1 with the help of the linings 12 targeted by the dowels 13 in such a way that a horizontal fold is formed. A bottoming well with walls 2 and a blade part 4S is mounted above the ledge 3 of which the sealing device 5 is placed, and the well is submerged to a position at which the sealing device 5 is lower than the forshacht 1. In this elastic cuff 8 is sunk in forshakhty 1 Then, with the help of his injection system, device 5 is put into operation and pressed against the ground under pressure.

Next, a thixotropic solution is fed through the pipe 13 into the cavity 14 between the ground and the wall 2 of the well, then, using an autonomous injection system, the working fluid is fed into the annular chamber of the clamping element 5 located in the forshakhta 1 puncture 6

(for example, water). The chamber, expanding in volume, pushes the wave-like fold of elements 5 out of 6 penalties, while the rhomb-shaped slits 10, which serve as compensators, are somewhat closed and due to this the cuff closes the gap between the forchacht 1 and the wall of the well 2, tightly (without folds) presses last under pressure P,

FO rsh

Further, in a well-known way, in the cavity 14 between the soil and the wall of the well, an overgrowth of thirsty thixotropic solution is created, the value of which during the whole immersion is maintained above the lateral pressure of the soil Rcr below the bottom of the foundations of the adjacent buildings.

When the well is submerged up to the design mark in the annular chamber 11 of the additional cuff and the corresponding chamber, the cuff of the sealing device creates and maintains the pressure of the working fluid (for example, water) associated with the following dependencies:

gf orsh

 R

P R a c t e;

GROWING # GROWTH IN

five

0

five

where r

forsh

city

Rnog

Urds-gb

h

five

0

pressure in the chamber beyond the additional cuff of the sealing device;

overpressure of a ticotropic solution; pressure in the sealing device; the volume weight of the thixotropic solution; the height of the thixotropic solution column between the cuff 8 and the sealing device 5. The overpressure of the thixotropic solution in the cavity between the soil and the wall of the well is maintained at the required level until the well is submerged by the design mark and completely replaced by the cement slurry, while the water pressure in the clamping element 9, the cuff 8 and the device 5 are retained until the replacement solution is completely solidified.

The device of an elastic cuff on a forshahta with a corresponding autonomous, injection system allows hermetically to seal off the thixotropic cavity from above, to ensure trouble-free

515782

immersion of the well under the overpressure of a thixotropic solution, which prevents the possible collapse of the soil below the bottom of the foundations of nearby buildings.

The invention allows the sinkhole to be immersed in close proximity to existing buildings and structures to prevent the settlement of their foundations.

Claims (1)

Invention Formula Drain well, including for-. 5 shaft, walls with ledge knife five ten 2 five 0 five the part and the located shoulder of the sealing device, characterized in that, in order to increase the reliability of excluding the deformations of the surrounding soil under the foundations of standing buildings, the forehead from the side facing the lowering well is made with a penalty covered with elastic attached horizontal edges to the surface of the forshahta cuff located in the fine clamping element, and the elastic cuff of the forshahta is made with a horizontal fold and rhomboid vertical slots. i at one Oh oh. ABOUT JOOOOOOO 7 13 7 / Fig.Z