Method for improving soil structure of coastal dredge fill
A technology of blowing and filling and seashore, which is applied in the direction of soil lifting machinery, application, agriculture, etc., can solve the problems of poor structure of blowing and filling, complicated mixing process, uneven soil distribution, etc., and achieve deep improvement depth and uniform soil distribution. , the effect of less reagent dosage
Active Publication Date: 2013-12-25
TIANJIN TEDA GREEN GRP CO LTD
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The existing dredger fill structure improvement is to change the physical structure of the soil by mixing exogenous additives, such as organic manure, peat soil, and river sand, with the dredger fill in proportion. Due to the poor structure and viscosity of the dredge fill, mixing The mixing process is complicated, the engineering quantity is large, the cost is high, and the distribution of soil quality is uneven after mixing, and the later leaching and desalination process is easy to form a dominant flow, resulting in waste of water resources
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] Tianjin Nangang Industrial Zone is located in the southeast of Tianjin Binhai New Area, close to the Bohai Sea, and the land area in the area is mainly formed by reclamation from the sea. The example test was carried out in the dredger fill soil improvement demonstration area near Nandi Road in Nangang Industrial Zone. The salt content of 1m soil in the area is in the range of 18-22g / kg, 8.02 Stand still, when the water content of the topsoil reaches 14.15%, add water to the polyacrylamide to adjust to a polyacrylamide solution with a concentration of 0.9g / L, flood irrigation, and the irrigation rate is 210L / m 2 ; Stand still, when the water content of the topsoil reaches 13.78%, add water to the polyacrylamide to adjust to a polyacrylamide solution with a concentration of 0.7g / L, flood irrigation, and the irrigation rate is 300L / m 2 , the improvement is over.
[0027] Before improvement, the soil hydraulic conductivity was still -1 ; After improvement, the soil hydraul...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for improving a soil structure of coastal dredge fill, which comprises the following steps of adding water into polyacrylamide for regulating to obtain polyacrylamide solution with concentration of 0.5-2.0g / L and irrigating with water amount of 100-350L / m2. Preferably, the polyacrylamide is negative ion type polyacrylamide with molecular weight between eight million to twelve million. By regulating moisture content of surface soil and concentration index of the polyacrylamide solution, the self viscidity structure of the dredge fill is rapidly improved in a layer-by-layer penetrating mode, the stable aggregate soil structure is established, permeability and water conductivity of the dredge fill can be remarkably improved, and water, fertilizer and salt transportation channels of the dredge fill are established.
Description
technical field [0001] The invention relates to a method for improving soil structure, in particular to a method for improving the soil structure of coastal dredging fill. Background technique [0002] Coastal dredging is a sedimentary soil formed by dredging the seabed mud from the offshore through hydraulic dredging. Because there is no soil forming process, and it is affected by seawater immersion for a long time, the soil has high salinity, strong sodium alkalinity, fine particles (mainly clay), sticky texture, poor structure, relatively high density and bulk density. Large, small porosity and permeability coefficient and extremely long natural desalination process have seriously restricted the construction of cities and ecological environments in coastal land reclamation. Soil structure improvement is the necessary prerequisite and fundamental way to realize rapid desalination and alkali discharge of coastal dredger fill and to establish good water, fertilizer and salt...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): A01B77/00
Inventor 王振宇赵秀芳张清王晓颖
Owner TIANJIN TEDA GREEN GRP CO LTD