Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Expansive soil surface reinforcing method based on EICP technology combined with sodium alginate
The invention relates to an expansive soil surface reinforcing method based on EICP technology combined with sodium alginate. When an injection method and a mixed compaction method are adopted in the traditional EICP technology, a large amount of EICP treating fluid is used, the cost is high, the workload is large, and when a spraying method is adopted, a generated calcium carbonate mineralization layer is thin, the quantity of calcium carbonate is limited, and the surface reinforcing effect is poor. The method comprises the following steps: extracting a crude urease solution; measuring the activity of the crude urease solution; preparing a cementing liquid; adjusting the pH value of the crude urease solution, and mixing the crude urease solution with the cementing solution to prepare an EICP treatment solution; and spraying the EICP treatment liquid on the surface of the expansive soil for multiple times. According to the method, the generation of calcium carbonate is delayed by adopting a low pH-EICP technology, the engineering operability is effectively improved, the penetration depth of the EICP treatment liquid into the expansive soil is increased, and the thickness of a calcium carbonate mineralization layer on the surface of the expansive soil is increased; sodium alginate is added in the EICP technology, the formed gelatinous material effectively fills the swelling soil pores, the deposition position of calcium carbonate is improved, and the cementation effect of the surface swelling soil is improved.
本发明涉及基于EICP技术联合海藻酸钠的膨胀土表面加固方法。传统EICP技术采用注入法和混合压实法时使用EICP处理液较多，成本高且工作量大，并且采用喷洒法时生成的碳酸钙矿化层厚度较薄且碳酸钙数量有限，表面加固效果不佳。本发明包括以下步骤：提取粗脲酶溶液；测量粗脲酶溶液的活性；配置胶结液；调节粗脲酶溶液的pH并与胶结液混合制成EICP处理液；将EICP处理液在膨胀土表面进行多次喷洒。本发明采用低pH‑EICP技术延缓碳酸钙的生成，有效增加了工程可操作性，且增加了EICP处理液渗入膨胀土的深度，使膨胀土表面碳酸钙矿化层的厚度增加；在EICP技术中添加海藻酸钠，形成的凝胶状材料有效填充了膨胀土孔隙，且改善了碳酸钙的沉积位置，提高了表层膨胀土的胶结效果。
Expansive soil surface reinforcing method based on EICP technology combined with sodium alginate
The invention relates to an expansive soil surface reinforcing method based on EICP technology combined with sodium alginate. When an injection method and a mixed compaction method are adopted in the traditional EICP technology, a large amount of EICP treating fluid is used, the cost is high, the workload is large, and when a spraying method is adopted, a generated calcium carbonate mineralization layer is thin, the quantity of calcium carbonate is limited, and the surface reinforcing effect is poor. The method comprises the following steps: extracting a crude urease solution; measuring the activity of the crude urease solution; preparing a cementing liquid; adjusting the pH value of the crude urease solution, and mixing the crude urease solution with the cementing solution to prepare an EICP treatment solution; and spraying the EICP treatment liquid on the surface of the expansive soil for multiple times. According to the method, the generation of calcium carbonate is delayed by adopting a low pH-EICP technology, the engineering operability is effectively improved, the penetration depth of the EICP treatment liquid into the expansive soil is increased, and the thickness of a calcium carbonate mineralization layer on the surface of the expansive soil is increased; sodium alginate is added in the EICP technology, the formed gelatinous material effectively fills the swelling soil pores, the deposition position of calcium carbonate is improved, and the cementation effect of the surface swelling soil is improved.
本发明涉及基于EICP技术联合海藻酸钠的膨胀土表面加固方法。传统EICP技术采用注入法和混合压实法时使用EICP处理液较多，成本高且工作量大，并且采用喷洒法时生成的碳酸钙矿化层厚度较薄且碳酸钙数量有限，表面加固效果不佳。本发明包括以下步骤：提取粗脲酶溶液；测量粗脲酶溶液的活性；配置胶结液；调节粗脲酶溶液的pH并与胶结液混合制成EICP处理液；将EICP处理液在膨胀土表面进行多次喷洒。本发明采用低pH‑EICP技术延缓碳酸钙的生成，有效增加了工程可操作性，且增加了EICP处理液渗入膨胀土的深度，使膨胀土表面碳酸钙矿化层的厚度增加；在EICP技术中添加海藻酸钠，形成的凝胶状材料有效填充了膨胀土孔隙，且改善了碳酸钙的沉积位置，提高了表层膨胀土的胶结效果。
Expansive soil surface reinforcing method based on EICP technology combined with sodium alginate
基于EICP技术联合海藻酸钠的膨胀土表面加固方法
ZHANG HONG (Autor:in) / LIU DAOSHENG (Autor:in) / WANG XUANXING (Autor:in)
26.03.2024
Patent
Elektronische Ressource
Chinesisch
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