Method for compacting bases formed by weak mineral soils

FIELD: construction.

SUBSTANCE: method for compacting bases formed by weak mineral soils includes making a well, filling a compacting material into the well, and creating the compacting impact by a hollow tubular working tool on the compacting material to form a compacting column. Preliminarily, engineering geological survey of the base soil is carried out, and the values of the strain modulus, the Poisson's ratio, the angle of internal friction, the specific cohesion, the specific gravity, the initial porosity coefficient of the weak mineral soil are determined. Then, the effective value of the strain modulus εi at expanding the compacting material in the well is calculated by the initial and specified porosity coefficient of the weak mineral soil according to the given dependence. Thereinafter the column spacing pitch is defined by the selection method in a range from one to three diameters of the columns, which gives the value of the design base deformation modulus, the necessary increase of the well radius in the process of indentation is calculated by the given dependencies. The well is made by means of indenting a tool in the base soil, filling the compacting material into the well is carried out through the working tool cavity, and the compacting impact for forming a compacting column is carried out by indenting the working tool into the compacting material. Additional engineering and geological survey are carried out on the site, the deformation modulus of the compacted soil between the columns, and the actual average deformation modulus of the base as a whole is calculated according to the given dependence. Then it is compared with the design one, and if the actual average base deformation modulus does not correspond to its design value, additional columns are installed between previously installed ones.

EFFECT: increasing soil compaction productivity, reducing material consumption and labour intensity.

5 cl

 



 

Same patents:

FIELD: construction.

SUBSTANCE: method includes formation of a well, placement of a stretching tight shell in it and supply of sealing substance. The well is formed by driving a pipe with a plug at the end and a stretching tight shell on the outer surface into soil. The sealing substance is supplied into the specified shell via longitudinal slots made in the pipe. The device comprises a working organ and a facility of impact load application to it, comprising a pipe, where a rod is inserted as capable of longitudinal displacement in it and contact with the working element. The stretching tight shell is placed onto the pipe and fixed, and longitudinal slots are made underneath in the pipe. The working element is made in the form of a rod, forming a plug, with a cone-shaped tip at the end and inserted into the guide pipe as capable of limited longitudinal displacement in it. The rod comprises an accessory to prevent fallout from the pipe, and its cone-shaped tip protrudes from the pipe.

EFFECT: increased density of soil by introduction of a stretching tight shell into it, expansion of device capabilities for creation of a pile with a support in a base.

8 cl, 2 dwg

FIELD: construction.

SUBSTANCE: method to reinforce soil, including formation of a well, installation of a flexible thin-walled shell in it, supply of a sealing substance into a gap between walls of the well and the shell, and development of a reinforcing action at the sealing substance, differing by the fact that for development of the reinforcing action, the thin-walled shell in the cross section is deformed into an oval shape, an additional gap is created along the small axis of the oval between walls of the well and the shell, the additional portion of the sealing substance is supplied into this gap, and the deformation wave is moved in the circumferential direction.

EFFECT: higher efficiency of soil reinforcing due to simultaneous reinforcement of soil and supply of a sealing substance.

13 cl, 19 dwg

FIELD: construction.

SUBSTANCE: invention relates to construction, in particular, to construction and operation of structures, having architecture of various heights. Method to prevent uneven subsidence of unevenly loaded foundations includes survey of soil, reinforcement of soil base in compliance with the data produced as a result of soil survey, and erection of foundation. Soil is surveyed under least loaded section of foundation. Then foundation is erected, and most loaded sections of soil base are reinforced by method of high-pressure injection proportionally to ratio of operational pressure of most loaded section to operational pressure of least loaded section.

EFFECT: provides for even subsidence of structure at various pressure of separate sections of foundations at soil by increasing stiffness of each section of base.

2 dwg

FIELD: building.

SUBSTANCE: method involves constructing multilayer foundation; erecting upper building structures. Process of foundation forming includes laying concrete layer on base; preparing water-proof layer above concrete layer; forming one or more cast-in-place and/or composite and/or precast reinforced concrete panels along foundation height or area; forming intermediate layer of hardening material under upper panel and/or panels before and/after their forming, wherein hardening material characteristics are determined from a given relation; forming channels with opened ends in upper panel so channels extend the full panel thickness and preferably have widened areas in lower parts thereof; installing tubes preferably having widened areas in lower parts thereof; sealing intermediate layer and/or water-proof foundation layer along foundation perimeter; channels are formed in places of highest design foundation settlement and deflection, including areas under load-bearing support structure building members, namely columns and/or walls. Upper channel and/or tube ends are located in access area. Channels and tubes are used for injecting hardening material in intermediate layer through upper channel and tube ends during erecting and/or using building, during performing building, including earth-moving, works near building or building structures, which may result in building settlement and/or heeling and/or deformation. Injection of hardening material forms separation into layers and/or cracks in intermediate layer, which are filled with hardening material. Hardening material is injected in channel or pipe having x, y coordinates with pressure, also determined from a given relation.

EFFECT: reduced building settlement, heeling and deformation during erection and usage.

14 cl

The invention relates to the construction, in particular to the construction and operation of buildings on slab foundations on non-uniformly compressible base

The invention relates to the field of construction and can be used in the device of the bases and foundations primarily on the soft ground and when the seal slaughter of bored piles by vtaplivanija (trebovaniya) macro-grained rock material or hard concrete mix

The invention relates to the construction, and in particular to methods of construction of foundations in the punched wells

FIELD: building.

SUBSTANCE: method involves constructing multilayer foundation; erecting upper building structures. Process of foundation forming includes laying concrete layer on base; preparing water-proof layer above concrete layer; forming one or more cast-in-place and/or composite and/or precast reinforced concrete panels along foundation height or area; forming intermediate layer of hardening material under upper panel and/or panels before and/after their forming, wherein hardening material characteristics are determined from a given relation; forming channels with opened ends in upper panel so channels extend the full panel thickness and preferably have widened areas in lower parts thereof; installing tubes preferably having widened areas in lower parts thereof; sealing intermediate layer and/or water-proof foundation layer along foundation perimeter; channels are formed in places of highest design foundation settlement and deflection, including areas under load-bearing support structure building members, namely columns and/or walls. Upper channel and/or tube ends are located in access area. Channels and tubes are used for injecting hardening material in intermediate layer through upper channel and tube ends during erecting and/or using building, during performing building, including earth-moving, works near building or building structures, which may result in building settlement and/or heeling and/or deformation. Injection of hardening material forms separation into layers and/or cracks in intermediate layer, which are filled with hardening material. Hardening material is injected in channel or pipe having x, y coordinates with pressure, also determined from a given relation.

EFFECT: reduced building settlement, heeling and deformation during erection and usage.

14 cl

FIELD: construction.

SUBSTANCE: invention relates to construction, in particular, to construction and operation of structures, having architecture of various heights. Method to prevent uneven subsidence of unevenly loaded foundations includes survey of soil, reinforcement of soil base in compliance with the data produced as a result of soil survey, and erection of foundation. Soil is surveyed under least loaded section of foundation. Then foundation is erected, and most loaded sections of soil base are reinforced by method of high-pressure injection proportionally to ratio of operational pressure of most loaded section to operational pressure of least loaded section.

EFFECT: provides for even subsidence of structure at various pressure of separate sections of foundations at soil by increasing stiffness of each section of base.

2 dwg

FIELD: construction.

SUBSTANCE: method to reinforce soil, including formation of a well, installation of a flexible thin-walled shell in it, supply of a sealing substance into a gap between walls of the well and the shell, and development of a reinforcing action at the sealing substance, differing by the fact that for development of the reinforcing action, the thin-walled shell in the cross section is deformed into an oval shape, an additional gap is created along the small axis of the oval between walls of the well and the shell, the additional portion of the sealing substance is supplied into this gap, and the deformation wave is moved in the circumferential direction.

EFFECT: higher efficiency of soil reinforcing due to simultaneous reinforcement of soil and supply of a sealing substance.

13 cl, 19 dwg

FIELD: construction.

SUBSTANCE: method includes formation of a well, placement of a stretching tight shell in it and supply of sealing substance. The well is formed by driving a pipe with a plug at the end and a stretching tight shell on the outer surface into soil. The sealing substance is supplied into the specified shell via longitudinal slots made in the pipe. The device comprises a working organ and a facility of impact load application to it, comprising a pipe, where a rod is inserted as capable of longitudinal displacement in it and contact with the working element. The stretching tight shell is placed onto the pipe and fixed, and longitudinal slots are made underneath in the pipe. The working element is made in the form of a rod, forming a plug, with a cone-shaped tip at the end and inserted into the guide pipe as capable of limited longitudinal displacement in it. The rod comprises an accessory to prevent fallout from the pipe, and its cone-shaped tip protrudes from the pipe.

EFFECT: increased density of soil by introduction of a stretching tight shell into it, expansion of device capabilities for creation of a pile with a support in a base.

8 cl, 2 dwg

FIELD: construction.

SUBSTANCE: method to recover a contact layer "foundation - soil base" includes the installation of injector pipes with injection holes, closed by a rubber collar and arranged in the gravel layer, in a pile foundation grill erected in winter time on bases, which are made of heaving soils for freezing and subsiding for thawing, after the arrangement of which during foundation soil thawing accompanied with subsiding processes, the contact layer "foundation - soil base" is recovered by the injection of cement mortar via the injector pipes into cavities of the gravel layer and cavities formed under the foundation with its subsequent hardening.

EFFECT: increased stability of foundations with a low grill, reduced labour intensiveness and material intensity, increased manufacturability and quality of performed works.

7 dwg

FIELD: construction.

SUBSTANCE: method for compacting bases formed by weak mineral soils includes making a well, filling a compacting material into the well, and creating the compacting impact by a hollow tubular working tool on the compacting material to form a compacting column. Preliminarily, engineering geological survey of the base soil is carried out, and the values of the strain modulus, the Poisson's ratio, the angle of internal friction, the specific cohesion, the specific gravity, the initial porosity coefficient of the weak mineral soil are determined. Then, the effective value of the strain modulus εi at expanding the compacting material in the well is calculated by the initial and specified porosity coefficient of the weak mineral soil according to the given dependence. Thereinafter the column spacing pitch is defined by the selection method in a range from one to three diameters of the columns, which gives the value of the design base deformation modulus, the necessary increase of the well radius in the process of indentation is calculated by the given dependencies. The well is made by means of indenting a tool in the base soil, filling the compacting material into the well is carried out through the working tool cavity, and the compacting impact for forming a compacting column is carried out by indenting the working tool into the compacting material. Additional engineering and geological survey are carried out on the site, the deformation modulus of the compacted soil between the columns, and the actual average deformation modulus of the base as a whole is calculated according to the given dependence. Then it is compared with the design one, and if the actual average base deformation modulus does not correspond to its design value, additional columns are installed between previously installed ones.

EFFECT: increasing soil compaction productivity, reducing material consumption and labour intensity.

5 cl

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