The method of construction of foundations in winter conditions

 

(57) Abstract:

The inventive active layer is carried out by crushing the frozen ground. Crushed frozen ground move in thawed ground first vertical and then horizontal directions. The resulting displacement of the soil is formed matramony pit, which perform the base block. 4 C.p. f-crystals, 9 Il.

The invention relates to the construction and for the construction of foundations of buildings and structures in winter conditions.

A known method of construction of foundations in winter conditions, including the thawing of frozen soil, the development of the pit and running in the excavation of Foundation block [1]

Closest to the proposed method is a method of construction of foundations in winter conditions, including the development of the pit by crushing and extraction of the frozen ground and running in excavation of Foundation block [2] the Disadvantage of known methods is insufficient bearing capacity of the Foundation.

The purpose of the invention increase the bearing capacity of the Foundation.

This is achieved due to the fact that the method of construction of foundations in winter conditions, including the and, crushing the frozen ground was carried out to a depth of active layer, and moving the crushed soil is carried out in thawed ground first vertical and then horizontal directions, and the fragmentation and relocation of frozen soil can be performed simultaneously. In addition, before crushing the frozen ground it perform vertical slit to form blocks, and the cracks are filled with depth equal to 0.7-0.8 of the height of the active layer, and/or fill gaps substance positive temperature followed by exposure over time.

In Fig.1 shows the outline of the existing Foundation and the array developed frozen ground; Fig.2 the pit with fragmented frozen ground; Fig. 3 scheme of wyrmbane of the pit of Fig.4 the Foundation of Fig.5 same as in Fig.1 for the Foundation with the broadening and development of frozen soil with the formation of the slit of Fig.6 the Foundation with the broadening of Fig.7 plan of cutting the frozen ground on blocks in the development of the trench under the strip Foundation; Fig.8 section a-a in Fig.7; Fig.9 the flow of crushed soil wedge tip.

During the Foundation in the active layer 1 carry out crushing the frozen ground 2 followed the s crushed soil carried out first in the vertical, and then in the horizontal directions. Thus in the ground waterboat pit, around which is formed in a thawed soil compacted zone 6. On bottom of the pit occiput dry soil and RAM him, then form in the pit of the base block 7.

P R I m e R 1. During the construction of printed pile Foundation for wyrmbane pit on the developed layer of frozen soil 2 make vertical destructive force, resulting in the fragmentation of frozen soil and its vertical movement of the melt in the soil 4. Then trimmed the ground move, for example, wedge tip 8 in the horizontal direction, melted into the surrounding soil. Vertical and/or horizontal movement can be accomplished by directional implosions or mechanical methods. Then continue wyrmbane of the pit to the design elevation.

P R I m m e R 2. During the construction of pile Foundation great depth develop the drilling column (diameter 1 m) in frozen ground 2 the annular gap 9. To the so formed block frozen ground (core) 10 applied mechanical force, destroy it, and crushed ground 3 move below freezing in the melt Cu, NaCl or sand) and incubated for 0.5 to 2 hours to reduce the temperature of not less than 0aboutC. Produce wyrmbane of the pit with the formation of 11 broadening the required dimensions and perform in the pit base unit 7. Cracks perform a depth equal to 0.7-0.8 of the height of the active layer 1, since the remaining layer has a lower strength due to migration of moisture and broken by mechanical force.

P R I m e R 3. In the construction of strip Foundation for the preparation of the trench to form the blocks 12 by cutting the longitudinal and transverse slots 13. Then destroy the blocks 12 and fragmented soil is pushed first melt down in the ground, and then horizontally under undeveloped frozen soil. The base of the trench and tamped mounted in the trench Foundation blocks.

Thus, the proposed method is the active use of frozen soil compaction thawed soil at the base and sides of the pit. When this seal thawed soil increases the reliability of the Foundation by reducing strain.

1. The METHOD of CONSTRUCTION of FOUNDATIONS IN WINTER CONDITIONS, including the development of the pit by crushing and displacement of the frozen ground and running in the pit tho soil is carried out in the active layer, and moving the crushed soil is carried out in thawed ground first vertical and then horizontal directions.

2. The method according to p. 1, characterized in that the crushing and moving frozen ground exercise at the same time.

3. The method according to PP.1 and 2, characterized in that before crushing the frozen ground it perform vertical slit to form blocks, and the cracks are performing a depth of 0.7 to 0.8 of the height of the active layer and/or fill gaps substance positive temperature followed by exposure over time.

4. The method according to PP. 1 to 4, characterized in that before the execution of Foundation block at the bottom of the pit lay the dry soil and RAM it.

5. The method according to PP. 1 to 5, characterized in that the pushing exercise directed by the explosion or by a wedge device.

 

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The invention relates to the field of construction and maintenance of settlements, cities, of different objects and can be used to protect soils and foundations of structures in the areas of various sizes and configurations from heat, erosion, and chemical precipitation for the year is stabilizing and lowering the temperature of extended arrays of soil below the average annual air temperature, creation or preservation of permafrost in the temperate and polar climates without the cost of artificial sources of energy

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2 cl, 1 ex

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5 cl, 1 ex

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