Waterproof structure for a panel joint of an underground diaphragm wall

A waterproof structure for a panel joint (102) of an underground diaphragm wall (100), comprising:

• a first waterstop (300) and a first cover plate (400);
• wherein the panel joint (102) is provided with a wall connection plate (200), and the underground diaphragm wall (100) has an excavation surface;
• in a direction perpendicular to the excavation surface, the wall connection plate (200) is arranged below the excavation surface of the underground diaphragm wall (100), and a first accommodating groove (104) is defined between the wall connection plate (200) and the panel joint (102) and adjacent to the excavation surface;
• wherein the first waterstop (300) is arranged in the first accommodating groove (104), and two wings of the first waterstop (300) are respectively and adhesively bonded to two sides of the panel joint (102);
• and
• wherein the first cover plate (400) corresponds to the first accommodating groove (104) and is arranged at the excavation surface, and the first cover plate (400) is detachably connected to the underground diaphragm wall (100).