Owners of personal houses from time to time face need of cleaning of drain holes, usually for these purposes cause the special car. Usually drain hole represents a hole imposed with a brick or concrete rings, and not so long ago stopped to build a drain hole with a modulation.
The essence of the device of work of that hole that it is broken into two parts, in the ode from which is got a drain pipe. the 1st part of a hole after filling to a certain level, through windows for a modulation gives to the second part. Such makary, all languid waste remains in the first office, watery flows in the second part.
In the 2nd part of a hole special windows for this purpose are placed that liquid could be absorbed in soil. Such device of a drain hole allows more rare to clear it.
On a photo. The hole is dug out by the excavator, in the left lower part the drain pipe is placed.
For копки soil the excavator was employed as to dig manually is very long and some people, for soil lifting from a hole are necessary. As a material for walls of a hole the brick of the second grade served. This brick does not differ a correctness of geometrical forms, its cost quite low, in a word all conditions for construction of a drain hole.
On a photo. A drain hole imposed with a brick, on an average wall of a window for a modulation.
Separate attention wished to direct on solution for a laying. As ordinary cement and sand solution in such criteria will be promptly washed away and collapse, in solution added elimination (small fraction) and snow-white sand without clay impurity. That solution has the highest krepkost on compression and will serve longer. Solution proportions the subsequent: 1 cements, 3 sand, 3 eliminations.
As in process копки holes reached to dense (clay слоёв soil), the base under walls of a hole was not arranged — the laying was made directly on soil.
As overlapping for a hole it was planned to use ferro-concrete hollow plates therefore face walls gave all the best in 1,5 bricks, and longitudinal in 1 brick. Such thickness of walls is completely capable to bear weight of plates, without danger of a collapse.
For the device of windows of a modulation used iron corners, with a shelf 7см.
On a photo. The hole is blocked by plates, it was necessary to cut down an opening for the hatch.
Upon termination of a laying, the crane laid overlapping plates after that in a plate over the first part of a hole made an opening for installation of the standard sewer hatch. Following the results of work the total amount of a hole made 80 m3 that will allow to use its long period without service.
