SU783412A1 - Method of erecting a lowerable well - Google Patents

Description

one

The invention relates to the field of construction of buried structures and can be used in the construction of subsidence wells in flooded soils.

There is a known method of fastening the lowering well against floating up with the help of a collar in the form of a cantilever ring over the top of the external walls of a boat, followed by loading of this collar with soil.

There is also known a method of erecting a lowering well, which includes immersing it in the ground using a thixotropic shirt, followed by replacing the material of the thixotropic shirt with a hardening solution 2.

However, these methods have the significant disadvantage that they equalize only partially the forces of the ascent and are not reliable enough.

The aim of the invention is to improve the reliability of keeping the well from ascending.

This goal is achieved by the fact that in the well-known method of erecting a lowering well, including its immersion into the ground using a thixotropic shirt with the subsequent displacement of the material of a thixotropic

shirts with hardening solution, the material of the thixotropic shirts is replaced with hardening expanding material with a bulk weight exceeding the bulk weight of the material of the thixotropic

shirts; the material of the thixotropic shirt can be replaced by gas concrete, and the substitution is carried out by horizontal layers along the height of the well, and

10 in each underlying layer can use a material with a longer setting time than in each layer above.

The method is carried out as follows.

The well is immersed in the soil in a thixotropic shirt. Upon reaching the projecting depth of the previously provided holes in

20 walls of the structure and pipes diluted in several Rus are pumped into the lower Rus an expanding composition, such as aerated concrete, with time; grabs 28 hours. Upon filling the layer

25 1-2 m high, through the overlying english holes, located 2-4 m above the lower one, pump the expanding compound with a setting time of 14 hours. This layer of the solution, solidified,

30 creates an increase in strength

construction with the surrounding soil and allows the lower layer of the solution to significantly increase the friction force due to the wedging effect of aerated concrete in an enclosed space.

After the start of solidification of the second upper layer, the injection operation is repeated in the same sequence and compositions as indicated above.

When performing the described administration, the thixotropic solution is displaced as less dense.

Claims (3)

1. A method of erecting a sinkhole, which includes immersing it in the ground using a thixotropic shirt, followed by replacing the material of the thixotropic shirt with a hardening solution, characterized in that, in order to increase the reliability of keeping the well from ascending, the material of the thixotropic shirt Za: 4escheto hardening expanding; material with a volume of 1: 4M weighing more than the volume weight of the material of a thixotropic shirt 2. The method according to claim 1, which means that the material of the tixtron shirt is filled with gas concrete. 3. Method according to paragraphs. 1 and 2, characterized in that the substitution is carried out in horizontal layers along the height of the well, and in each underlying layer a material with a longer setting time is used than in each layer above. Sources of information taken into account in the examination 1. Bajtsur AO I. Fixing the bottom wells against floating. - npONMiujieHKoe construction D972, b,. 2, Ter-Galustov SD, Ivanov V.D. Drop structures in a thixotropic shirt. M ,, Stroyizdat, 1970 (prototype).