SU1386693A1 - Method of consolidating foundation - Google Patents

Description

(21) 4138467 / 29-15

(22) 10/21/86

(46) 04/07/88. Bul № 13 / /

(71) The Bureau for the Introduction of New Types of Bases and the Foundation Research Institute of Bases and Underground Structures named after N.M. Gersevanova

(72) B.C. Ostyukov, A.N. Basiev, V.A. Pevzner, Yu.E. Bronstein, A.L. Mikhlin and K.P. Katzov

(53) 627.8 (088.8)

(56) Foundations, foundations and underground structures. Designer's Handbook ./ Ed. E.A., Sorochana and Yu.G. Trofimenkova. - M .: stroiizdat, 1985, p. 407-408.

Recommendations for the design and construction of slotted foundations. M., NIIOSP, 1982, p. 18-30.

(54) METHOD OF STRENGTHENING THE FOUNDATION

(57) The invention relates to hydraulic construction. The purpose of the invention is to improve the quality of strengthening the base. In the soil mass 1 dig trenches 2 under the protection of the mud. Distance l

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between trenches is prescribed in accordance with the ratio L (0.2-0.3) B, where B is the length of the trench. In this case, clay on the crust forms on the walls of the trenches. In the trench, reinforcement cages 5 are installed and the trench is filled with concrete mix (EC) using a vertically moving concrete block 7. Before being fed into the trench of the BS, wiping devices made of strips 9, set at an angle to the horizontal m, exceeding the angle, are lowered into it. natural repose BS, the level of which is maintained in the interval between the lower and upper edges of the wiper. The strips 9 are provided with vertical bars 10. Cleansing devices are inserted into the space between the walls of the trenches and the reinforcement cages. In the process of supplying the BS trenches and removing the concrete pipe, together with the latter, the stripping devices are removed, thereby destroying the clay crust on the lateral surfaces of the parallel walls of the trenches. 1 hp f-ly, 3 ill.

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I The invention relates to hydraulic engineering and underground construction t can be used in strengthening the banks, dams, as well as in strengthening the foundations in the construction of industrial and civil facilities.

: The purpose of the invention is to improve the quality of strengthening.

FIG. 1 shows an array in the HT mooring according to the proposed method,. from above; FIG. 2 shows a cut of A — L in FIG. one; in fig. 3 shows the node I in FIG. 2

In the soil mass 1, trenches 2 are excavated under the protection of the mud 3. The distance between the trenches is prescribed in accordance with the ratio L (0.2-0.3) B, where B is the length of trench 2. At the same time, clay is formed on the walls of trench 2 on the crust 4. In the trench 2 install reinforcing cages 5, then proceed to fill the trench 2 with concrete mixture; 6 by means of a vertically movable concrete pipe 7.

Before the concrete mixture 6 is fed into the trench 2, cleaning tools 8, made of obliquely mounted strips 9, fitted with vertical weights 10, are lowered into it. Cleaning devices 8 are inserted into the space between the walls of the trench 2 and reinforcement cages 5. During the feeding process into the trenches 2 the concrete mix 6 I remove the concrete pipe 7 i: oBMecTHo with the latter, the cleaning of the trenching device 2 8 is removed, thereby destroying the clay crust 4 on the lateral surfaces of the parallel walls of the trenches 2 facing one another Oh.

When introduced into the space between the walls of the trenches 2 and the reinforcement cages 5, the wiper devices are installed in such a way that the angle of the inclined strips 9 to the horizontal exceeds the angle of repose of the concrete mix 6, and the level of the latter when removed from

the trenches 2 of the concrete pipe 7 and the wiping devices 8 are kept in the interval between the lower and upper edges of the wiper 8.

Claims (2)

1. A method for strengthening a base, including arranging fixed arrays by digging out parallel trenches under the protection of a mud solution to form a mudcake on their soil walls, installation in trenches of reinforcement cages and subsequent filling of trenches with concrete using a vertically moving concrete block, from the fact that, in order to improve the quality of reinforcement, the distance L (m) between parallel trenches is prescribed according to the ratio   P 7 - P and, J, where B is the length of the trench, m, moreover, during the filling of the trench the concrete mixture on the mutually facing surfaces of parallel trenches destroys the clay cake as this is filled in the area of the upper layer of the concrete mixture by introducing wipers into the space between the trench wall and the reinforcement cage together with the reinforcement cage installed in the trench and removing these wipers together with removing vertically movable concrete pipe. 2. The method according to claim 1, which is different from the fact that the stripping devices are made in the form of inclined strips and are set at an angle to the horizontal that exceeds the angle of repose of the concrete mix filling the trench, and the level of the latter is maintained in the interval between the lower and upper edges of the wiper. -1 G one one. Ij