SU1283396A1 - Method of constructing sinkable well - Google Patents

Abstract

This invention relates to the field of underground construction. The goal is to reduce construction costs by combining bottom-bottoming and water downfall. To do this, before diving the lowering well (OK) I in its central plane, form a trench (t) 2 out of its limits with vertical walls. The depth T 2 exceeds the depth of submersion OK 1. The formation of T 2 is carried out under the protection of water by creating its excessive pressure in T 2 by means of constant topping-up. Then a perforated pipe 3 with previously attached vertical anchor rods A-A (L

Description

From 6-8 Water 6

: i

IND

00

with so about

FIG. 2

(AC) 4. Utilon is attached to the bottom and a vertical pipe 5 with a submersible pump 7 with a pipeline 8, T 2 is placed in the lower point T 2 and filled with drainage material. After that, anchoring of the bottom 10 is effected by contacting it with AC 4. If necessary (depending on the parameters of OK 1 and hydrogeological conditions), the cement slurry is injected into the perforated pipe. 3 v. P, f-ly, 4 ill.

one

The invention relates to underground construction and relates to the construction of subsidence wells for various purposes.

The aim of the invention is to reduce construction costs by combining measures for anchoring the bottom and water lowering.

Fig. 1 shows a drainage well at the time of immersion, a plan view; figure 2 - section aa in figure 1; FIG. 3 shows the node I in FIG. 2; in fig. 4 section bb in fig.Z.

The construction of the bottom well is carried out as follows.

Before installing the well 1 in its central plane, a vertical trench 2 is torn off with a bias to one side. The formation of trench 2 is carried out under the protection of water by creating an overpressure by continuously topping up the water while lowering its level. In the trench 2 a perforated pipe 3 is placed, to which, prior to laying in the trench 2, anchor rods 4 are attached by bending around the lower half of the perforated pipe 3 and subsequent welding. After laying the perforated pipe 3 with anchor rods 4 in the trench 2, the vertical pipe 5 is lowered into the lower point of the trenches 2, then the trench 2 is filled with drainage material 6. After the installation of the subsurface well 1, the submersible pump is lowered into the vertical pipe 5 7 with piping 8. The immersion of the well 1 is performed under the protection of the water lowering system provided by the submersible pump 7. When the kq of deck 1 is in position 9, the construction of the bottom is started 10. At the same time, the reinforcement cage of the latter (not shown) is connected with the anchor rods 4 released from the soil when it is excavated from the excavation, and then proceed to concreting the bottom 10. After the end of the dewatering, if necessary (depending on the parameters of the subsurface well and hydrogeological conditions of the area), the cement slurry is injected into the perforated pipe 3 to homogenize - cleaning drainage material: 6, filling trench 2.

Claims (1)

1. A method of constructing a drainage well, including mounting the casing, water lowering with the help of submersible pumps, immersing the casing in the ground, arranging the bottom with anchoring the latter, is characterized by the fact that, in order to reduce construction costs by combining the bottom anchoring and dewatering, the dewatering is carried out by forming in the central plane of the well beyond its limits trenches with vertical walls with a depth that exceeds the depth of the well and then laying it on but the trenches of a perforated pipe with vertical anchor rods, installing submersible pumps in one of the corners of the trench and filling it with drainage material, and the bottom is capped by connecting it with vertical anchor rods that are bare when the shell is immersed in the ground. In this way, the formation of a trench is carried out under the protection of water by creating its overpressure in the trench by means of constant topping-up. R No in hb about 000 T