Dewatering of high water content subsoil under the action of water absorber

Most of the high water content subsoil dewatering treatment use methods such as adding flocculants to improve the dewatering performance, and the soil samples cannot be utilized after alkaline agent treatment. For this reason, a physical method of treating high water content subsoil was proposed using polymer water-absorbent resin SAP, and through the indoor water absorption test and mercury intrusion test, the mechanism of dewatering and deformation of high water content subsoil under the action of water-absorbent agent was studied, and the results show that: the water content of subsoil obtained by water-absorbing with polymer water-absorbent resin SAP reached the lowest under the overlaying pressure of 3 kPa. After water absorption, the pore volume and size of the subsoil reduced, and the pore structure became more complex and irregular. Under the action of polymer water-absorbing resin SAP, the free water in the mud was absorbed through the internal permeable channels, the particles were rearranged under the action of self-weight, the permeable channels between the particles were gradually reduced, and the subsoil shrinks and deforms.