SU1530676A1 - Arrangement for protecting foundations against frost-induced swelling - Google Patents

Abstract

The invention relates to construction and relates to a device for protecting foundations against frost bulging. The purpose of the invention is to increase the reliability of the device by providing water from the water-saturated sand and gravel soil during its freezing by performing drainage in the form of an open vertical box 1 below. The inner walls of the box 3 are enlarged upwards at an angle of 1.5-3. The outer walls may be straight or tapering upwards. 2 Il.

Description

one

(21) 4384509 / 23-33

(22) 01/21/88

(46) 12/23/89. Bul Number 47

(71) Research Institute of Foundations and Underground Structures named after N.M. Gersevanova

(72) A.M.Pchelintsev and V.O.Orlov (53) 624.159.1 (088.8)

(56) Orlov V.O., Dubnov Yu.D., Ierenkov I.D. Swelling of freezing g / runts and its influence on the foundations of the Facilities. - L .: Stroyizdat, 1977, p. 161.

Tsytovich N.A. Mechanics of frozen soils, - M .: Higher School, 1973, p. 354.

(54) DEVICE FOR PROTECTING THE FOUNDATIONS FROM FREEZING (57) The invention relates to the construction and relates to a device for protecting foundations from frost buckling. The purpose of the invention is to improve the reliability of the device by ensuring the removal of water from the water-saturated sand and gravel in the process of its freezing through: by performing drainage in the form of an open vertical bottom box-1. The inner walls of the 3 boxes are made expanding upward at an angle of 1.3-3 °. The outer walls may be straight or narrowed upwards. 2 Il.

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The invention relates to construction and relates to a device for protecting foundations against frost bulging.

The aim of the invention is to increase the reliability of the operation of the device by ensuring the removal of water from water-saturated sand and gravel soil during its freezing.

FIG. 1 shows the proposed device, a cross-section in FIG. 2 is a section A-A in FIG. 1.

The device is designed as a drainage system, which is an open vertical bottom box 1, which has a cover 2, the inner walls 3 expanding upwards at an angle of 1.5-3 ° and the side shoulders 4 in its lower part. The inner walls 3 are coated with a lubricant 5 that does not harden in the cold. The outer walls 6 are straight or tapering upwards. Water drain 1 is installed near the foundation 7

to the bottom of the excavation 8 on the gravel layer of the device operation due to the depletion of soil 9 below the depth of seasonal soil freezing. Ditch 8 trail sandy-gravel soil 10 to the design mark. The cavity 11 of the drainage system 1 is filled with water, the level 12 of which corresponds to the level of water in the sand and gravel soil. In the process of frostbite 13 in winter, the water accumulating; sand and gravel soil forms ice 14, due to which excessive pressure on the water

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the drainage of the sandy-gravel soil during its freezing, drainage installed below seasonal freezing and filled in the form of an open vertical bottom box with lateral flanges in its lower part, the inner walls of the duct widening upwards at an angle of 1 , 5-3 and coated with a non-hardening lubricant.

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1) the underlying sand-gravel layer. The least resistance to this pressure is exerted by ice 14 in the cavity 11 of the drainage system 1, since the walls 3 are covered with grease 4. In addition, the walls 3 upward in the direction of pressure expand. As a result, ice 14 is squeezed out of the drainage system 1, which relieves stress in frozen soil 15 in the trench 8. This eliminates both frost swelling of the sand-gravel mixture in the pit around the foundation and frosty swelling of the foundations.

Claims (1)

Invention Formula A device for protection of foundations against frosty embossing, made in the form of a drainage system installed at a distance from the foundation at the bottom of the excavation pit, characterized in that the drainage of the sandy-gravel soil during its freezing, drainage installed below seasonal freezing and filled in the form of an open vertical bottom box with lateral flanges in its lower part, the inner walls of the duct widening upwards at an angle , 5-3 and coated with a non-hardening lubricant. I