Anti-seepage structure of underground diaphragm wall with different thicknesses

The utility model provides an underground diaphragm wall anti-seepage structure with different thicknesses. The underground diaphragm wall anti-seepage structure is composed of a first underground diaphragm wall enclosure structure, a combined underground diaphragm wall enclosure structure and a second underground diaphragm wall enclosure structure which are continuously distributed. The length and the thickness of the first underground diaphragm wall enclosure structure are smaller than those of the second underground diaphragm wall enclosure structure; the combined underground diaphragm wall enclosure structure is a multi-section underground diaphragm wall enclosure structure with gradually increased thickness; the thicknesses of two sections of diaphragm wall enclosure structures, close to the first underground diaphragm wall enclosure structure and the second underground diaphragm wall enclosure structure, of the combined underground diaphragm wall enclosure structure are respectively equivalent to the th