Deformation monitoring method for diaphragm wall reinforced earth dam

The invention discloses a deformation monitoring method for a diaphragm wall reinforced earth dam. A dam crest anti-cracking pavement structure comprises an anti-cracking pavement, a waterproof well lid, a reserved settling tank, a displacement monitoring device, an angle monitoring device and a forced centering disc. The anti-cracking road surface is laid above the dam crest, and a vertical guide wall of the anti-cracking road surface is embedded into dam body soil; the reserved settling tank is distributed in the position above the concrete diaphragm wall in the dam axis direction, and an empty groove structure is defined by the reinforced concrete pavement of the anti-cracking pavement, the two vertical guide walls and dam body soil. And the waterproof well lid is arranged on the reinforced concrete pavement right above the reserved settling tank. According to the method, dam crest cracks caused by differential settlement between the wall body and the dam body of the diaphragm wall reinforced earth dam can