Dredger fill sludge dewatering and solidification method

A drainage consolidation and dredging mud filling technology, which is applied in the fields of water filling, soil protection, infrastructure engineering, etc., can solve the problems of high water content of dredging mud, long time-consuming drainage and consolidation, and difficulty in mud-water separation, etc., to achieve Enhance the effect of mud-water separation, improve drainage efficiency, and speed up the effect of mud-water separation

Inactive Publication Date: 2012-01-11
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of high water content in dredging and filling mud, difficulty in mud-water separation, etc., which further lead to proble...

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  • Dredger fill sludge dewatering and solidification method

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specific Embodiment approach

[0024] A certain place along the southeast coast of China needs to be filled with land, and it is planned to use hydraulic filling and vacuum preloading methods. The marine silt in this sea area has a water content of 105% and a bulk density of 1.5 tons / m 3 , Party A requires to complete the dredging and filling project in the shortest possible time, and requires the bearing strength of the foundation to reach 200 kPa. The project uses two 2500 m 3 / h cutter suction dredger 12 hours of operation. In order to solve the problems such as long time required for natural solid-liquid separation of dredged fill sludge in the landfill, and a large amount of sludge taken away by the backwater discharge, during the project implementation process, the drainage of dredged fill sludge was improved by injecting separation aids on the conveying pipeline. Consolidation speed and effect. The specific implementation method is:

[0025] 1. Divide the partition wall of the dredging filling ar...

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Abstract

The invention discloses a dredger fill sludge dewatering and solidification method, belonging to the hydraulic dredger fill field of hydraulic engineering. The method mainly comprises the processes of sludge suction, pumping, separation adjuvant dosing, dewatering, pre-pressing solidification and separation adjuvant dosing. The implementation of the method comprises the steps of: firstly partitioning a dredger fill area, then dissolving and diluting separation adjuvant, arranging separation adjuvant dosing points on a dredger fill sludge delivery pipe, evenly mixing the separation adjuvant under the hydraulic agitation effect of delivered sludge in the pipe, spraying the mixed sludge into the dredger fill area, avoiding artificial disturbance as much as possible, finally drain supernatant clear water of the dredger fill area and using a pre-pressing method for further dewatering and solidification to form a foundation. By adopting the method, the separation adjuvant is evenly mixed with the dredger fill sludge under the hydraulic agitation effect during pipe delivery. Through the effects of collision, coagulation, flocculation, agglomeration and the like, the grain size of the dredger fill sludge is increased, the sludge-water separation speed is accelerated, the dewatering efficiency is improved, the sludge solidification effect is promoted and the engineering benefit is improved. The method has the advantages of that the method is economic, practical and environment-friendly.

Description

technical field [0001] The invention belongs to the field of hydraulic dredging in water conservancy projects, in particular to a method for draining and consolidating dredged sludge. Background technique [0002] With the rapid development of social economy, the scale of cities has gradually increased. Many cities use the intertidal zone of the bay to reclaim land from the sea, and the required soil and rock sources are getting less and less. Silt, the waste from dredging of ports and waterways, came into being as the filling material for land construction. The seabed silt was blown and filled into the enclosure, and after certain treatment, it became a foundation with a certain bearing capacity. The land filling method has been generally accepted and widely used in land reclamation projects in coastal areas. When the dredged silt is sandy soil, due to its non-viscosity and high permeability, the drainage and consolidation of dredged geotechnical bag pipes and artificial f...

Claims

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Application Information

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IPC IPC(8): E02B3/18E02D3/10E02D3/12
Inventor 陈宏聂小宝蒋昌波赵利平陈绍文黄良材刘胜宇黄筱云陈铂喻黎明
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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