Reinforcing bases and foundations on collapsible soils in cramped conditions

 

(57) Abstract:

Usage: in the field of construction. The inventive near usisamem Foundation, from its drawdown develop the pit. From pit perform cavity keystone shape, then dig a vertical hole from the bottom of the pit. Set throughout the volume of the pit and the cavity of the valve and fill the hardening material with the formation of the pile shaft with the console. 2 C. p. F.-ly, 1 Il.

The invention relates to the construction, namely the method of strengthening the bases and foundations of deformable buildings and structures.

There is a method of reducing deformation structures including the injection of a hardening material under a basic part of the structure, placed on the soil Foundation [1]

The closest technical solution of the invention is a method for stabilizing and lifting structure foundations, including the removal of soil from the vertical pit near usisamem Foundation, education cavity under the Foundation, installation of valves and flow of solid material with the formation of the pile shaft with the console, the formation of a concrete pit in the soil below the pile and injection under high pressure plasticene increased support at the base of the piles [2]

The disadvantage of these methods is their low efficiency.

The purpose of the invention increase the efficiency of amplification of bases and foundations on collapsible soils in confined conditions.

This goal is achieved by the fact that close to settling the Foundation developed a vertical pit, under a basic part of a settling Foundation produced cavity trapezoidal shape in cross section, with the base surface of the cavity is at an angle of 45aboutis the formation of the trunk and console by installing the valve in the hole and the cavity; filling their hardening material, while for the console uses an expanding hardening material and the thickness of the subsidence of the soil from the bottom of the pit to the hard sand or macro-grained rock layer of the ground is taken not more than six diameters of the pit.

The drawing shows a section of the pit with odnokonturnoy pile.

The method is as follows.

From drawdown Silaeva Foundation 1, beneath the wall 2 of the building act the pit 3 for production work. Under the Foundation produces a cavity, a trapezoidal shape in cross section with height A= 1/2(BF.STVwill cause subsidence deformations and as a result the sediment piles.

In the pit, as well as in the three-dimensional cavity under a basic part of the settling of the Foundation is installed steel valves 6 and 7, weldable at the place of installation.

Next, the entire volume of the pit and the volume of the cavity is filled with a hardening material such as concrete, with the formation of the pile shaft with the console, and the console is used expanding hardening material. Using the expanding hardening of the material allows, firstly, to eliminate all the gaps between the supporting parts of the structure of the cantilever piles and soil; secondly, the "redistributor" the load transmitted Foundation soil Foundation. The length of the pile is determined depending on the degree of pliability of the soil, which is very important for the strengthening of individual parts of a building or structure.

Strengthening the Foundation and Foundation dostigaetca.

The application of the proposed method in practice, improves the efficiency of amplification of the bases and foundations of deformable buildings and structures on ground subsidence in cramped conditions, so as to produce works do not require a large area, as well as special mechanisms.

The economic efficiency of the invention is to reduce the cost of strengthening of bases and foundations, opportunities for work low-skilled workers and simple technology.

1. Reinforcing BASES AND FOUNDATIONS ON COLLAPSIBLE SOILS IN CRAMPED CONDITIONS, including the development of a vertical pit near usisamem Foundation from its slump, the formation adjacent to the pit cavity under a basic part of the settling of the Foundation and formation of the pits and cavities, respectively, of the pile shaft with console by setting the valve and feeder hardening of the material in the pit and the cavity, wherein the cavity forming under a basic part of the settling of the Foundation is made from pre-designed pit, while the cavity perform keystone shape in cross section with height A = 1/2 (Bf+ Bwithtand the OS is from NGOs, the dimensions of the Foundation and walls, and the vertical pit develop from the bottom of the pit, and the pit do with a diameter of not less than 0.6 m

2. The method according to p. 1, characterized in that the vertical pit perform to the depth at which the thickness of the subsidence of the soil from the bottom of the pit to the hard sand or macro-grained rock layer is not more than 6 diameters of the pit.

3. The method according to p. 1, characterized in that the console piles perform from the expanding hardening material.

 

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Pile foundation // 2056477

Pile foundation // 2056476
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FIELD: building, particularly for erecting pile-plate foundations for industrial buildings and structures, for instance for main buildings of heat power plants.

SUBSTANCE: method involves arranging drilled cast-in-place pile, grouting plate grillage and installing antivibration mounts. Anchorage reinforcement is placed in pile heads and arranged along marked building axes. Anchorage reinforcement is then grouted and resilient antivibration mounts are installed at pile heads. Resilient antivibration mounts are fixed in plane on anchorage reinforcement with the use of fasteners so that antivibration mounts may perform restricted movement. Installed on antivibration mounts is rigid metal foundation frame of upper building in which anchoring reinforcement for securing skeleton of building to be erected is installed. Reinforcement rods and supply lines are inserted in process orifices formed in foundation frame beams and frame is grouted to form panel grillage.

EFFECT: reduced work content, increased simplicity and speed of bearing grillage frame erection; improved building stability.

9 cl, 5 dwg

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