Septic tank the hands
The sizes of a septic tank are defined proceeding from number of people living in the house. Usually, for an ordinary family completely awaking enough septic tank in total amount 9-12м3. So after with a septic tank site everything is solved, it is necessary to dig out a hole in the sizes 3600мм in length, 2400мм in the width and 2100мм depth (for a septic tank in working volume 9м3). It is necessary to straighten walls of a hole as much as possible laboriously, and the bottom should be strictly horizontal. Further everything is covered by a polyethylene film.
The thickness of concrete of walls and the bottom should be 200мм because on them, in – 1-x, there is a pressure of soil, and in – 2-x the brutal wettish environment will affect. Narrower concrete layer will promptly become unfit for use. At first the bottom is filled in. Before filling it is necessary to connect and lay an armaturny grid on a hole bottom. Section of a rod of fittings 10мм, and sizes of a section 20х20мм. The grid rises over a film by means of a beaten brick. Now it is possible to fill in concrete, leveling it a rule, and checking horizontal position by means of construction level.
After concrete will gather a fortress it is possible to start to expose a timbering on external walls of a septic tank. Wood boards from boards for this purpose get off. The height of boards should be 1500мм. After assembly, it is possible to upholster the equal party with polyethylene that will facilitate timbering removal after concrete hardening. Boards are installed horizontally on all perimeter of a hole with a space 200мм from soil and fixed by struts. It is necessary to see that concrete has very huge pressure upon a timbering therefore boards should be more 40мм in the width, and to hold apart them it is necessary with special care. Between soil and boards the same armaturny grid is put, as well as when filling bottom. In that wall to which the sewer pipe will approach it necessary not to forget to make mortgage (outlet). For this purpose, usually, the slice of an asbestotsementny pipe is inserted. Now it is possible to concrete. It is better to pour concrete layers, moderately distributing it on all perimeter. Each 20-sanimetrovy layer is necessary for stamping. It is necessary to concrete without interruptions, in other words, how to be spoken "to begin and terminate".
In 14-21 days the timbering can be removed. Now it is necessary to mark a site of the central partition and as it central, should be on the septic tank center. In other words it is necessary to measure from a wall 1500мм and to expose one party of a timbering. With a space in 200мм one more party is exposed. If all sizes are sustained truly, two similar compartments with the spotless size 1500х2000х1500мм should turn out, in other words the volume of everyone is equal 4,5м3. Approximately at height 1000мм from the septic tank bottom the piece of an asbestotsementny pipe also is inserted into a timbering, thus from that compartment to which the ditch a piece will be brought exposed aflush with a timbering, and on the other hand with release by the 200-300th. It will be a perelivny opening. Precisely also between a timbering the armaturny grid is put and there is a filling.
After concrete will settle (in 14-21 days), the timbering acts in film and the blocking plate becomes. First on perimeter of walls the corner 90х90мм is put metal, the shelf inside and cooks between itself. Then again from this a corner cells in the size 600х600мм become. At all this two corners cook between themselves the "T" small letter. The thin slate cut for the necessary sizes keeps within these cells, on perimeter the timbering in height 200мм from a septic tank wall is exposed, and from above a corner the armaturny grid is put. Two cells (on one over each compartment) leave, it hatches in a septic tank (round them the timbering in height 200мм also is established) will be open. After this preparation everything is filled in with concrete. After concrete will gather a fortress (not earlier than in 21 days) on perimeter of open compartments the bricklaying on height 400мм (at desire it is possible to do a laying diametrical under the size of a standard cover of the hatch) becomes. In a way the septic tank left on 200мм below earth level. Now it is possible to fill up it with a 10-centimetric layer керамзита and a 10-centimetric layer of clay, and from above притрусить ordinary soil. On hatches from a corner and sheet metal rectangular covers become or the round cover of the hatch is established.
Better that the ready septic tank staid without use, on the last measure, 1 year. For this period of time it will give a certain usadka. In an unpleasant case at a usadka the plastic sewer pipe entering into it from out of can be damaged.