Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Expansive soil foundation improved by using phosphate tailings and straw ash and construction method of expansive soil foundation
The invention discloses an expansive soil foundation improved through phosphate tailings and straw ash and a construction method of the expansive soil foundation. The construction method comprises the steps that S1, the phosphate tailings, the straw ash and expansive soil are evenly mixed to obtain mixed soil; s2, determining the optimal water content of the mixed soil through a compaction test; s3, the water content of the mixed soil obtained in the S1 is adjusted to be kept at the optimal water content, moisture preservation and standing are conducted for 12 h at the room temperature after uniform mixing, and the improved soil can be obtained. The obtained improved soil is laid on a construction surface, the thickness is 25-65 cm, the ground is roughly leveled through a bulldozer, then a large road roller is used for compacting, the road surface is precisely leveled, and the compaction degree required by road surface construction is achieved; the phosphate tailings and the straw ash are mixed into the expansive soil, so that the dynamic strength and the dynamic cohesion of a foundation soil body can be improved, and the free expansion rate of the expansive soil is reduced; the improved expansive soil is small in expansion and shrinkage, durable and high in stability; compared with a method for improving the expansive soil by lime, the cost of using the phosphate tailings and the straw ash is lower.
本发明公开了一种利用磷尾矿及秸秆灰改良的膨胀土地基及其施工方法，步骤为：S1：将磷尾矿、秸秆灰与膨胀土拌合均匀得到混合土；S2：通过击实试验确定混合土的最佳含水率；S3：调整S1得到的混合土的含水量保持在最佳含水率，拌合均匀后室温保湿静置12h，即可得到改良土。将得到的改良土在施工面铺设，厚度为25～65cm，先用推土机将地面进行大致整平，后利用大型压路机进行压实，将路面精确推平，达到路面施工要求的压实度；使用磷尾矿及秸秆灰掺入膨胀土，可提高地基土体的动强度和动黏聚力，降低膨胀土的自由膨胀率；改良后的膨胀土具有涨缩性小，耐用，稳定性强；与石灰改良膨胀土的方法相比，用磷尾矿及秸秆灰的成本更低。
Expansive soil foundation improved by using phosphate tailings and straw ash and construction method of expansive soil foundation
The invention discloses an expansive soil foundation improved through phosphate tailings and straw ash and a construction method of the expansive soil foundation. The construction method comprises the steps that S1, the phosphate tailings, the straw ash and expansive soil are evenly mixed to obtain mixed soil; s2, determining the optimal water content of the mixed soil through a compaction test; s3, the water content of the mixed soil obtained in the S1 is adjusted to be kept at the optimal water content, moisture preservation and standing are conducted for 12 h at the room temperature after uniform mixing, and the improved soil can be obtained. The obtained improved soil is laid on a construction surface, the thickness is 25-65 cm, the ground is roughly leveled through a bulldozer, then a large road roller is used for compacting, the road surface is precisely leveled, and the compaction degree required by road surface construction is achieved; the phosphate tailings and the straw ash are mixed into the expansive soil, so that the dynamic strength and the dynamic cohesion of a foundation soil body can be improved, and the free expansion rate of the expansive soil is reduced; the improved expansive soil is small in expansion and shrinkage, durable and high in stability; compared with a method for improving the expansive soil by lime, the cost of using the phosphate tailings and the straw ash is lower.
本发明公开了一种利用磷尾矿及秸秆灰改良的膨胀土地基及其施工方法，步骤为：S1：将磷尾矿、秸秆灰与膨胀土拌合均匀得到混合土；S2：通过击实试验确定混合土的最佳含水率；S3：调整S1得到的混合土的含水量保持在最佳含水率，拌合均匀后室温保湿静置12h，即可得到改良土。将得到的改良土在施工面铺设，厚度为25～65cm，先用推土机将地面进行大致整平，后利用大型压路机进行压实，将路面精确推平，达到路面施工要求的压实度；使用磷尾矿及秸秆灰掺入膨胀土，可提高地基土体的动强度和动黏聚力，降低膨胀土的自由膨胀率；改良后的膨胀土具有涨缩性小，耐用，稳定性强；与石灰改良膨胀土的方法相比，用磷尾矿及秸秆灰的成本更低。
Expansive soil foundation improved by using phosphate tailings and straw ash and construction method of expansive soil foundation
利用磷尾矿及秸秆灰改良的膨胀土地基及其施工方法
ZHUANG XINSHAN (Autor:in) / YANG DUAN (Autor:in) / YANG BENCHI (Autor:in)
07.03.2023
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2016
Reinforced Soil Foundation for Expansive Soils
| British Library Conference Proceedings | 1994