| 段海煦,胡兴波,冯俊义,马浩冉,黄占斌.盾构渣土去盐碱处理材料筛选[J].农业环境科学学报,2024,43(12):3004-3012. |
| 盾构渣土去盐碱处理材料筛选 |
| Screening of desalination-alkali treatment materials of topographic soil for shield muck |
| 投稿时间：2023-11-15 |
| DOI：10.11654/jaes.2023-0961 |
| 中文关键词: 盾构渣土 去盐碱处理 地形用土 资源化利用 |
| 英文关键词: shield muck desalination-alkali treatment topographic soil resource utilization |
| 基金项目:北京市首发天人生态景观有限公司科研课题（YF-2021-06-技术服务01） |
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| 中文摘要: |
| 为加快盾构渣土无害化和资源化处理利用，本研究通过模拟试验方法，以钠基膨润土型、纯碱型和弱碱型3种盾构渣土为对象，研究盐碱土不同修复材料对盾构渣土pH、电导率和全盐量等的影响，并分析其用作地形用土的可行性。结果表明：相较腐植酸、红石膏和木醋液处理，脱硫石膏是一种高效、环保和经济的去盐碱化材料。对于钠基膨润土型盾构渣土，脱硫石膏用量为渣土干质量2.0%时，盾构渣土pH可由9.91降低至8.0以下；对于纯碱型盾构渣土，脱硫石膏用量2.5%时，pH由10.61降至8.0以下；对于弱碱型盾构渣土，脱硫石膏用量0.5%时，盾构渣土pH可由9.87降低至8.0以下，可满足《公园设计规范》（GB 51192—2016）和《园林绿地工程建设规范》（DB11/T 1175—2015）的用土要求。研究表明，施用脱硫石膏对盾构渣土去盐碱处理可用作地形用土。 |
| 英文摘要: |
| In this study, we use a simulation test method to investigate the effects of various saline and alkaline treatment materials on three types of shield slag soil regarding pH, electrical conductivity, and total salt. The goal is to expedite the safe and creative treatment and utilization of shield slag soil. The research object is sodium bentonite-based, soda ash-based, and weakly alkaline shield slag soil. Desulfurized gypsum is a high-effect, economic, and environmentally friendly material compared with the solution of humic acid, red gypsum, and wood vinegar. For sodium bentonite-based type shield muck, when desulfurized gypsum is 2.0% of muck dry mass, the pH of shield muck can be reduced from 9.91 to below 8.0. For pure alkali shield muck, the amount of desulfurized gypsum is 2.5%, and the pH is reduced from 10.61 to below 8.0. For weak alkali type shield muck, the pH of shield muck can be reduced from 9.87 to below 8.0 when the desulfurization gypsum content is 0.5%. The aforementioned circumstances satisfy the requirements for soil use as described in "Specification for the Design of Parks"（DB11/T 1175—2015）. Topographic soil can be created by treating shield slag soil with saline after desulfurized gypsum has been applied. |
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