The method of preparation of the bottom of the tank

The invention relates to the field of construction and can be used in the preparation of the grounds of a large vertical steel tanks, primarily constructed in macroporous soils. The method of preparation of the bottom of the tank includes the passage of excavation, soil compaction beaters, the device ground pad. Base before the seal is divided into a number of annular sections, taking into account the non-uniformity of the sediment flexible tank floor and rammed them in stages, starting with the Central plot. In the first step of compacting the Central plot rebuff to the level of an adjacent parcel, which start next, and left after compacting at the first stage of unconsolidated soil is cut to the same mark. In the next step, the Central and the adjacent ring sections rebuff to the level of the next adjacent section, followed by truncation of unconsolidated soil. The same operation is repeated on the next stages and the last stage is implemented by plugging all sites at the same time to the necessary planning level, providing the required density for different parts of the grounds. The technical result consists in the alignment of the sediment bottoms of the tanks and s;">

The invention relates to the construction and can be used in the preparation of the grounds of a large vertical steel tanks, primarily constructed on macroporous soils.

It is known that the bottom steel tanks taken over all absolutely flexible plate with flexibility S>10 SAG unevenly. The centre provides a draught of 1.24-1.57 times greater than that of the edge (see Gorbunov-Posada, M. I.; Malikova, I. A., Solomin, C. I. analysis of structures on elastic Foundation. - M.: Stroiizdat, 1984. - S., Il.).

The known method of preparing the bottom of the tank, including the development of the pit, the device ground pad (see Ivanov, Y. K., P. Konovalov A., Mangosi R. A., Sotnikov, S. N. Bases and foundations of the tanks. - Moscow: Stroiizdat, 1989).

The disadvantage of this method is that, somewhat reducing precipitation, it does not affect their irregularity. Moreover, for large diameter tanks cushion with a thickness of about 3M is a small part of the compressible strata.

The known method of preparing the bottom of the tank, including the passage of excavation, soil compaction by heavy beaters, the device ground pad (see reference manual mechanized compaction, M.: stroiizdat. - 1965. the site.

The disadvantage of this method is that a uniform soil compaction also does not align precipitation and leads to incomplete emptying of the tanks, the concentration of bottom water and accelerated corrosion of the material of the bottom.

Object of the invention is the alignment of the sediment bottoms of the tanks and ensuring long-term operation.

This object is achieved in that in the method of preparing the bottom of the tank, including the passage of excavation, soil compaction beaters, the device ground cushion, characterized in that the base before the seal is divided into a number of annular sections, taking into account the non-uniformity of the sediment flexible tank floor and rammed them in stages, starting with the Central section, at the first stage of compacting the Central plot rebuff to the level of an adjacent parcel, which start next, and left after compacting at the first stage of unconsolidated soil is cut to the same mark, in the next step, the Central and the adjacent ring sections rebuff to the level of the next adjacent section, followed by truncation of unconsolidated soil, the same operation is repeated on the next stages and the last stage is implemented by plugging ¾ parts of the grounds.

The novelty of the proposed method lies in the fact that the base before the seal is broken into sections, and cutting of the soil at each site is carried out in stages with the shortfall with regard to subsequent maximum separation at the seal to the necessary planning marks. After compacting the Central part of the remaining unconsolidated soil is cut to mark the next annular surface, then the operation is repeated for the following reason.

The invention is illustrated in the drawing, where Fig.1 shows a plan of the grounds, divided into sections. In Fig.2 is a section showing the levels of the ring sections, from which step by step is plugging of the soil to the required planning marks. In Fig.3 stages (a-g) seal base compaction, showing the sequence of the cut of the soil.

The method of the substrate is as follows. Pre detached pit 1, then the basis in the plan is divided into a number of sections 2-5 (Fig.1), which gradually thickened different number of strokes to the necessary planning marks 6 (Fig.2).

At the first stage of the stamp (Fig.3,and the Central section 2 is precipitated to the level of a neighboring parcel 3, which begins the mark. In the next step (Fig. 3,6) areas 2 and 3 okazivautsya to the level of the adjacent section 4, followed by truncation of unconsolidated soil 7. This operation is repeated at the next stage (Fig.3). At the last stage (Fig.3,g) is plugging all sites at the same time.

As a result, when the rein back to the necessary planning marks 6 allocated plots of ground 2-5 in the process of compacting reaches the desired density of 8 for different parts of the grounds.

Claims

The method of preparation of the bottom of the tank, including the passage of excavation, soil compaction beaters, the device ground cushion, characterized in that the base before the seal is divided into a number of annular sections, taking into account the non-uniformity of the sediment flexible tank floor and rammed them in stages, starting with the Central section, at the first stage of compacting the Central plot rebuff to the level of an adjacent parcel, which start next, and left after compacting at the first stage of unconsolidated soil is cut to the same mark, in the next step, the Central and the adjacent ring sections rebuff to the level of the next adjacent section, followed the plugging of all sites at the same time to the necessary planning marks, providing the required density for different parts of the grounds.