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A platform for research: civil engineering, architecture and urbanism
Method for reducing expansibility of expansive soil
The invention discloses a method for reducing expansibility of expansive soil. According to the method, the expansive soil is treated by adopting a microbial induced calcium carbonate technology, sporosarcina pasteurii strains can generate urease in the metabolism process, urea can be decomposed into ammonium ions and carbonate ions, and due to the special structure of cell walls, the surfaces ofthe cell walls are negatively charged; when a solution contains calcium ions, the calcium ions can be adsorbed by cells, so that calcium carbonate crystals with a gelling effect are formed around themicrobial strains by taking the cells as crystal nucleuses, and the calcium carbonate crystals are attached to the surface of the expansive soil; and the calcium carbonate crystals are increased and gradually cemented together along with the proceeding of the metabolic reaction of microorganisms, so that expansibility development of the expansive soil is inhibited, and the method has the characteristics of low energy consumption, multiple types, abundant resources, environmental friendliness and the like.
本发明公开了一种降低膨胀土膨胀性的方法，采用微生物诱导碳酸钙技术对膨胀土进行处理，巴氏芽孢八叠球菌菌株在新陈代谢过程中会产生脲酶，可将尿素分解成铵根离子和碳酸根离子，由于细胞壁的特殊结构，细胞壁表面带负电荷，当溶液中含有钙离子时，钙离子会被细胞吸附，从而以细胞为晶核，在微生物菌种周围形成具有胶凝作用的碳酸钙结晶，碳酸钙结晶附着在膨胀土表面，随着微生物代谢反应的进行，碳酸钙结晶增多，并逐渐胶结在一起，从而抑制膨胀土膨胀性的发展，具有能耗小、种类多、资源丰富、环境友好等特点。
Method for reducing expansibility of expansive soil
The invention discloses a method for reducing expansibility of expansive soil. According to the method, the expansive soil is treated by adopting a microbial induced calcium carbonate technology, sporosarcina pasteurii strains can generate urease in the metabolism process, urea can be decomposed into ammonium ions and carbonate ions, and due to the special structure of cell walls, the surfaces ofthe cell walls are negatively charged; when a solution contains calcium ions, the calcium ions can be adsorbed by cells, so that calcium carbonate crystals with a gelling effect are formed around themicrobial strains by taking the cells as crystal nucleuses, and the calcium carbonate crystals are attached to the surface of the expansive soil; and the calcium carbonate crystals are increased and gradually cemented together along with the proceeding of the metabolic reaction of microorganisms, so that expansibility development of the expansive soil is inhibited, and the method has the characteristics of low energy consumption, multiple types, abundant resources, environmental friendliness and the like.
本发明公开了一种降低膨胀土膨胀性的方法，采用微生物诱导碳酸钙技术对膨胀土进行处理，巴氏芽孢八叠球菌菌株在新陈代谢过程中会产生脲酶，可将尿素分解成铵根离子和碳酸根离子，由于细胞壁的特殊结构，细胞壁表面带负电荷，当溶液中含有钙离子时，钙离子会被细胞吸附，从而以细胞为晶核，在微生物菌种周围形成具有胶凝作用的碳酸钙结晶，碳酸钙结晶附着在膨胀土表面，随着微生物代谢反应的进行，碳酸钙结晶增多，并逐渐胶结在一起，从而抑制膨胀土膨胀性的发展，具有能耗小、种类多、资源丰富、环境友好等特点。
Method for reducing expansibility of expansive soil
一种降低膨胀土膨胀性的方法
CAI HONG (author) / WEI YINGQI (author) / WANG ZIWEN (author) / XIAO JIANZHANG (author) / YAN JUN (author) / WU SHUAIFENG (author) / SUN LIMING (author) / XIE DINGSONG (author) / SONG JIANZHENG (author)
2020-08-25
Patent
Electronic Resource
Chinese
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