Method for determining soft soil foundation landfill site foundation treatment mode based on foundation bearing capacity

Abstract

The invention discloses a method for determining soft soil foundation landfill site foundation treatment mode based on foundation bearing capacity. Firstly correction of foundation bearing capacity is carried out according to geological exploration report, then whether the corrected foundation bearing capacity meets landfill site total load requirement is judged, and whether treatment is required is determined according to the judging result, if treatment is required, the selected treatment mode includes foundation treatment by adopting reinforcement cushion rubber (1) or foundation treatment by adopting reinforcement cushion rubber and setting vertical shaft (2). The invention utilizes the load characteristics of large occupying area of landfill site, long load application period and step application, landfill process of landfill site is taken as step loading process, the improvement of foundation bearing capacity in operation period of landfill site is analyzed according to piling, loading and prepressing method, the landfill speed and foundation bearing capacity correspond over time by controlling operation procedure, and meanwhile reinforcement cushion rubber is arranged to provide a drainage layer for soft soil foundation, thus not only improving foundation bearing capacity but also being capable of effectively reducing differential settlement of small repository.

Description

technical field [0001] The invention relates to a method for selecting a foundation treatment method, in particular to a method for selecting a foundation treatment method for a landfill on a soft soil foundation. Background technique [0002] With the improvement of environmental protection requirements in my country, sanitary landfills of different sizes are currently being built in various parts of the country. Some large and medium-sized cities are also planning to build a number of sludge disposal sites for the post-disposal of polluted river sediment and municipal sludge. . Different from the geology of mountainous areas, soft soil foundations are widely distributed in the eastern coastal areas of my country. How to consider the bearing capacity of the foundations when building large-area load structures such as garbage sanitary landfills and silt disposal sites on soft soil foundations has become an important issue. One of the concerns of engineering construction. [...

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Problems solved by technology

[0006] (2) Uneven load distribution

In addition, in areas where soft soil is widely distributed, the groundwater level is generally high. Depending on the design of the landfill process, subject to the limitation of the groundwater level, the disposal site sometimes adopts an above-ground dam type landfill, and the dyke load around the disposal site is a one-time Applied to the foundation, while the load in the reservoir area is applied in stages, which will also cause uneven load distribution;

[0007] (3) The load distribution area is large

It is undoubtedly the most economical choice to carry out heaping or vacuum preloading treatment on the project construction site according to the drainage consolidation method before construction. However, the actual situation is often limited by factors such as project construction period, funds and land acquisition. No time requirement for preloading

[0009] All in all, landfills (including landfills and solid waste disposal sites such as sludge) occupy a large area. For soft soil foundations, if the conventional composite foundation treatment method is adopted, the project investment will undoubtedly increase on a large scale. For the treatment of large-area soft soil foundations by vacuum or surcharge preloading method, the treatment cycle takes at least half a year, and the treated foundation is also difficult to achieve the foundation bearing capacity required for one-time landfill completion

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