Method for dredging soft foundation by dredger fill and reinforcement

Abstract

The invention relates to the field of building foundations, in particular to a method for dredging a soft foundation by dredger fill and reinforcement. The method includes: a, zoning for dredger fill; b, forming a primary drainage system; and c, performing layered and zonal filling and reinforcement. The method is characterized in that in zoning for dredger fill, each filling unit (11) is 20000m<2>-50000m<2> in area; in formation of the primary drainage system, digging crisscross blind ditches (31) on the surface of the filling unit (11), and laying corrugated filter pipes (32) and drain boards (33) on the surface for the filling unit (11); and in layered zonal filling and reinforcement, filling the filling area (1) level by level, and reinforcing with all levels of drainage networks. The method is convenient in construction, short in construction period, effective in foundation treatment and low in construction cost.

Description

technical field [0001] The invention relates to the field of building foundations, in particular to a method for treating dredged soft soil foundations in which dredging, filling and reinforcement are simultaneously carried out. Background technique [0002] The use of dredged soil for land reclamation can dredge waterways on the one hand, and can be used as land-making materials on the other hand. Therefore, more and more projects use dredged soft soil for land reclamation, but dredging soft soil for land reclamation will inevitably encounter problems. Go to the foundation to solve the problem. [0003] The current treatment process for newly dredged soft soil with high water content and almost zero strength is: after the completion of dredging and filling, it should be aired for a period of time (usually more than 1 year) to make the surface layer of the dredged silt form a certain amount. After the strength has been improved, then pave basil to form a construction cushio...

AI Technical Summary

Problems solved by technology

The foundation treatment methods mainly include drainage consolidation methods, such as surcharge preloading method, vacuum preloading method and related variants, such as low-level vacuum preloading method, vacuum preloading method without sand cushion, etc., but these technologies usually require It can only be used when construction machinery can enter the site, and the cost and construction period are not advantageous. Specifically, the traditional drainage consolidation technology has the following shortcomings: 1. Construction machinery cannot enter the site. Due to the weak site, It is difficult for people to enter, and no matter how good the foundation treatment method is, it is useless; 2. The construction period is long, usually it takes more than 1 year to dry, plus the construction period during the construction period, usually at least 2 years, it is difficult to reach the owner Urgent demand for land use; 3. The cost is relatively expensive, usually up to 300 yuan / m 2 Above; 4. It is difficult to allocate resources. Generally, the drainage consolidation method requires a sand cushion, but usually in the dredged silt area, the sand resources are very precious, and it is difficult to meet the construction requirements, and the effect of natural treatment is greatly reduced.

[0004] At present, new methods such as high-vacuum compaction method have come out. Although it is also effective in dredging and filling soil, it is still difficult to adapt to dredged soft soil with excessive clay content.

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