Treating soil

#Conventionally, in order to obtain stabilized ground necessary for civil engineering construction in rivers, lakes, marshes, harbours and the sea where said weak soil layer is at the bottom, it is necessary that said weak soil layer is removed and that sand and/or soil is put there. This requires high skill, and is difficult and time-consuming, and is accordingly costly. Moreover, there would be pollution problems in removing and treating a large amount of removed weak soil layer on land.

#With those piling methods and/or sand-pile method which are generally known for use in these cases, it is extremely difficult to obtain the stabilized foundation ground necessary for civil construction by driving piles and sand-piles into a deep and wide area of said weak soil layer, and it is also impossible to put these methods in practice as the equipment and/or system necessary for carrying out said methods becomes huge in size.

#An important object of the present invention is therefore to provide a treatment method by which said weak soil layer, which cannot be stabilized and treated by the conventional methods, can be effectively and efficiently treated and turned into a stabilized foundation ground necessary for civil construction.

#FIG. 1 is a diagrammatical vertical sectional view showing a weak soil layer being continuously treated and stabilized up to a certain necessary height from the bottom supporting foundation by a treatment equipment of the present invention.

#FIG. 2 is a sectional side view of FIG. 1 taken along the line I--I of FIG. 1;

#FIG. 3 is a front elevation view of a treatment equipment embodying the present invention;