SU905379A1 - Method of constructing subterranean structures - Google Patents

Description

(54) METHOD FOR BUILDING UNDERGROUND STRUCTURES

one

The invention relates to constructions, in particular, to the erection of underground structures mainly in weak, water-saturated soils.

There is a method of erection of underground structures using bottom wells, including the construction of structures on the surface and its immersion under its own weight while simultaneously excavating 1.

The disadvantage of this method is the longer the duration and the complexity of the work.

The closest to the proposed technical solution and the achieved result is a method of erecting underground structures, including penetration of a well in the ground, installation of an elastic cylinder with a two-layer shell in it, expansion of the well by supplying the working medium to the balloon under pressure, the formation of walls and the bottom 2.

The disadvantage of this method is the need for a temporary fastener and formwork to form walls and

bottoms, and laying concrete in difficult conditions.

The purpose of the invention is to increase the efficiency of work.

The goal is achieved by those. that in the method of erection of underground structures, including the penetration of a well in the ground, the installation of an elastic cylinder with a two-layer shell in it, the expansion of the well by supplying the working medium to the cylinder under pressure, the formation of walls and the bottom, the walls and the bottom of the structure between the shells of the container, and simultaneously creating a pulsating pressure in the cylinder by supplying and discharging the working medium under variable pressure, the average value of which is equal to the pressure of the hardening mat Afterwards, the inner shell is removed.

The invention is explained in drawing 20, which represents the erected underground structure, section.

In a well-known way, for example, under a thixotropic solution, well 1 is placed into an elastic cylinder.

2 with a double-layer outer 3 and inner 4 shells connected to the tip 5, which is equipped with pipelines for supplying the working medium b and hardening material 7. By supplying the working medium under pressure to the cylinder 2, the well 1 is expanded to the required size (shown by dotted lines). Then in the space 8 between the shells 3 and 4 of the cylinder through pipelines 7 serves hardening material, simultaneously in the cylinder 2 create a pulsating pressure by supplying and discharging working fluid under pipe 6 under a variable pressure, the average value of which is equal to the pressure of the hardening material. The working medium can be preheated to speed up the setting. After the material has hardened, the outer shell 3 is detached from the tip 5, and the inner shell 4 is removed together with the tip 5 for reuse. The outer shell 3 remaining in the structure serves as a hydrolization of the underground structure.

The use of the proposed method of erecting underground structures allows reducing the time required to erect the structure by using one technical device for well penetration, erecting walls and the bottom, compaction, and warming up the hardening solution, besides formwork devices are not required and further disassembly. The quality of the work performed is improved due to the fact that the walls and the bottom form inside the shells and, therefore, the soil does not enter the solid solution, and the injection of a solid solution under pressure while it is being compacted with the pulsating pressure of the working medium increases its density.

Reliable hydrolysis of the recessed room is created due to the fact that

the outer shell is left in the ground, labor costs are reduced due to the fact that all operations of the method are mechanized, capital expenditures are reduced, since tubs, vibrators and other specialized devices and mechanisms necessary to create buried premises are not required by known methods.

The present invention will find application in construction on weak and subsiding soils in the construction of underground structures such as storage of liquid and bulk materials, as well as foundations, anchors.

Claims (2)

1. Complex bases and foundations. Designer's Handbook. M., Stroyiz dates, 1969, p. 57-83. 2. Litvinov I. M. Depth strengthening and compaction of subsiding soils. K., “Budivelnik, 1969, p. 55-57. I