RU2334055C1 - Method of basement strengthening - Google Patents

Abstract

FIELD: building.

SUBSTANCE: invention refers to building, in particular, to strengthening of the bases under the basements. The way of strengthening of the basement erected on waterlogged priming coats and near to the located constructions includes supply of early strength concrete in the metal tubing established in driven wells, drilled through a basic part of the basement and a ground. Pipes are made with the welded boots, in pipes lower explosive charges and fill with early strength concrete, then the explosive charges are detonated, remaining hollownesses of driven wells and pipes are filled with early strength concrete.

EFFECT: provision of reliable strengthening of the basements erected in waterlogged priming coats and near to located constructions; increase of load-carrying capacity.

2 dwg

Description

The invention relates to construction, in particular to the strengthening of the foundations.

A known method of compaction of the soil, including immersion in the soil of the injector, the flow of the solution under pressure, measuring and recording the pressure of the solution, the formation of the zone of compacted soil and the subsequent immersion of the injector with the formation of the adjacent zones of the compacted soil, the compaction of the dispersion soil is carried out by pumping a sealing and penetrating solution, providing destruction of the soil structure in the zones of its weakening, with preliminary compaction of the soil along the contour of the compaction zone [1].

The disadvantage of this method is that it is designed to compact only dispersion soils, which usually have a low filtration coefficient.

There is a method of strengthening the soil by completely replacing it with a concrete mixture using bored and cement piles using casing [2].

The disadvantage of this method is the inability to use it to strengthen the foundations of buildings and structures exposed to uneven settlement.

There is a method of strengthening the tape foundations, which provides for broadening the soles of the foundations and, if necessary, replanting them on bored piles by means of the device broadened cavities in previously drilled in a row with the foundations wells [3].

The disadvantage of this method is the difficulty of its application in the production of work in cramped conditions, when buildings and structures are nearby.

There is a method of strengthening the foundation near the structures located, close in technical essence to the proposed invention and taken as a prototype, in which the strengthening of the foundation is carried out by pumping a quick-setting cement mortar through perforated pipes installed in wells drilled through part of the foundation and soil [4].

The disadvantage of this method is the difficulty of its use to strengthen the foundations built on water-saturated soils due to the inevitable leaching of cement.

The aim of the invention is to remedy this drawback.

The technical problem solved by the invention consists in the fact that in the known method, which includes injecting quick-setting cement mortar into pipes installed in wells drilled through the supporting part of the foundation and soil, pipes are made with welded shoes, explosive charges are dropped into them and filled a quick setting cement mortar, after which explosive charges are detonated.

The brewed shoes prevent the penetration of groundwater into the pipes and the washing out of the cement mortar, and the broadened cavities formed as a result of the explosion and connected with the foundation allow it to expand its sole or lean on soil layers with increased bearing capacity.

The difference from the prototype is the closing of the lower ends of the pipes with shoes, the absence of perforated sections on the pipes and the use of explosive charge energy under a layer of cement mortar to form broadened cavities associated with the foundation. The presence of distinctive features allows us to conclude that the proposed method for strengthening the foundation of the criterion of "novelty."

The proposed method is illustrated by drawings, in which Fig. 1 shows a diagram of the installation of pipes with explosive charges and their filling with quick-setting cement mortar, and Fig. 2 shows a diagram of the formation of broadened cavities after undermining explosive charges.

The method of strengthening the foundation is as follows (figure 1). Wells (2) are drilled through the foundation plate (1) of the structure to the required design depth. After drilling, a metal pipe (3) with a welded shoe (4) is placed in each well. Explosive charges (5) are lowered into the tube and filled with quick-setting cement mortar (6). Then, explosive charges are detonated, resulting in the formation of a broadened cavity (7), which is immediately filled with cement mortar. The remaining cavities of the borehole (8) and pipes (9) are filled under pressure with quick-setting cement mortar (see figure 2).

This method provides the strengthening of the foundation, erected in water-saturated soils and in the vicinity of structures, by creating associated concrete piles based on soil layers with increased bearing capacity.

List of sources

1. Pat. 2119009 RF, IPC ⁶ E02D 3/12. The method of compaction of the soil. / A.V. Lubyagin, BC Mironov; applicant Novosib. state Acad. of the country; patent holders Novosib. state Acad. St-v., A.V. Lubyagin, BC Mironov. - No. 97101054/03; declared 01/27/97; publ. 09/20/98. - 6 p.

2. Pat. 2209267 RF, IPC ⁷ E02D 3/12, 5/34, 5/36, 5/46. The method of fixing the soil. / A.V. Chernyakov, O.V. Bogomolova, S. D. Kayeshkov, V. N. Varygin, A. A. Varnachev; applicants A.V. Chernyakov, O.V. Bogomolova, S.D. Kayeshkov, V.N. Varygin, A.A. Varnachev; patent holders A.V. Chernyakov, O.V. Bogomolova, S.D. Kayeshkov, V.N. Varygin, A.A. Varnachev. - No. 2001135354/03; declared 12/27/2001; publ. 07/27/2003. - 4 p.

3. Pat. 2105100 RF, IPC ⁶ E02D 27/08, E02D 37/00. A way to strengthen the tape foundations. / A.T. Zaporozhets, N.M. Makeykin; applicants A.T. Zaporozhets, N.M. Makeykin; patent holders A.T. Zaporozhets, N.M. Makeykin. - No. 95103635/03; declared 03/14/95; publ. 02/20/98. - 4 p.

4. Pat. 2263787 RF, IPC ⁷ E21D 1/00, 9/00, E02D 3/12. The method of opening and repairing the deep tunnel. / L.M. Zinker [et al]; patent holder of OJSC "Eastern Scientific Research Mining Institute". - No. 2004118189/03; declared 06/15/2004; publ. November 10, 2005, Bull. No. 31. - 10 s.

Claims (1)

A method of strengthening the foundation erected on water-saturated soils and in the vicinity of structures located, including pumping quick-setting cement mortar into metal pipes installed in wells drilled through the supporting part of the foundation and soil, characterized in that the pipes are made with welded shoes, explosive charges are lowered into the pipes and filled with quick-setting cement mortar, after which explosive charges are undermined, the remaining cavities of wells and pipes fill quick yvayuschimsya grout.

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