Construction method of stock dump capable of accelerating dehydration and drying process of dredging deposited sludge

Abstract

The invention relates to a construction method of a stock dump capable of accelerating dehydration and drying process of dredging deposited sludge. One side of the deposited sludge stock dump is provided with an outlet the upper side of which flushes with the top part of the stock dump, and the bottom part thereof is provided with parallel drainage ditch at interval; drain pipes are laid in the drainage ditch and slope towards to the outlet in a certain gradient; water seepage gravels are arranged at the periphery of the drain pipes to avoid the drain pipe from being blocked; the middle part of the drain pipe is provided with a vertical pipeline communicated with an external vacuum system through a collection pipeline on the top surface of the stock dump. After the dredging deposited sludge enters into the stock dump, the sludge deposits at the bottom part, and the clear water overflows from the outlet; in the dehydration and drying process of the deposited sludge, the separated free water content flows into the bottom part of the drainage ditch through a sludge depositing layer, passes through the gravels to enter into the drain pipe, and is discharged from the stock dump after being collected through the drain pipe; the external vacuum system sucks the drain pipe to be in a negative pressure state, thus increasing drain water heads of the deposited sludge of the stock dump and accelerating water removal in the deposited sludge. The construction method of the invention can accelerate the drying process of the deposited sludge in the stock dump, thus shortening the occupied period of the stock dump.

Description

technical field [0001] The invention relates to a method for constructing a dredged bottom mud storage yard, in particular to a storage yard construction method capable of accelerating the dehydration and drying process of the dredged bottom mud, improving the bearing capacity of the bottom mud in the storage yard, and improving the utilization rate of the storage yard. The invention belongs to the technical field of environmental engineering dredging sediment treatment and disposal. Background technique [0002] With the development of the economy and the acceleration of the industrialization process, a large amount of domestic sewage and industrial wastewater without proper treatment are directly discharged into rivers or lakes, resulting in serious pollution of urban rivers and lakes in our country. The treatment of polluted rivers and lakes is mainly achieved by cutting off external pollution sources and dredging polluted sediment. Dredging polluted sediment is an impor...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the drainage head in the sediment stockpile, it is difficult to discharge the water in the bottom sludge in the late stage of sediment drying, and it is also difficult for the sediment to reach the set bearing capacity, and the drying period of the sediment is also limited. longer

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