| 公路膨胀土路堑边坡防护方案探讨 |
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| 引用本文： | 毛新虎.公路膨胀土路堑边坡防护方案探讨[J].地球科学与环境学报,2004,26(4):49-53. |
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| 作者姓名： | 毛新虎 |
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| 作者单位： | 山西省交通科学研究院,山西,太原,030006;长安大学,地质工程与测绘工程学院,陕西,西安,710054 |
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| 基金项目： | 国家自然科学基金项目(10071045)，山西省交通厅科技项目(2001 08) |
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| 摘 要： | 针对膨胀土路堑边坡的公路工程特点，总结以往膨胀土路堑边坡的防护措施，根据以往膨胀土路堑边坡的防护成败资料和经验。以保持边坡土体天然含水量状态的相对稳定，保持边坡土体结构的相对完整性。保持边坡土体足够的抗剪强度和防护工程应能适应边坡膨胀土体可能产生的膨胀变形与膨胀力不遭破坏。首先用DAH混合溶液改良膨胀土边坡的表层土，使DAH混合溶液与膨胀土产生离子交换发生化学反应，从而使表层膨胀土体改变性能，成为正常土，然后结合以往路堑边坡处理方法进行综合处理。实践证明，此方法不但充分利用了膨胀土．节约了工程投资，而且又绿化、美观了边坡，使其与周围环境相协调，从而为膨胀土地区公路路堑边坡处理提供了一种切实可行的防护措施。
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| 关 键 词： | 膨胀土边坡 土体结构 边坡 抗剪强度 膨胀变形 膨胀土地区 天然含水量 表层土 综合处理 保持 |
| 文章编号： | 1672-6561(2004)04-0049-05 |
| 修稿时间： | 2004年1月2日 |
Discuss of cutting slope treatment project for expansive soil on highway |
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| MAO Xin-hu.Discuss of cutting slope treatment project for expansive soil on highway[J].Journal of Earth Sciences and Environment,2004,26(4):49-53. |
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| Authors: | MAO Xin-hu |
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| Abstract: | The cutting slope of expansive soil is the construction formed by digging the soil when the highway goes across expansive soil. It changes natural condition, destroys natural physiognomy, and demolishes natural balanceable conditions of rock stress. The cutting slope of expansive soil exposes soil to a certain embedding depth to atmosphere, which directly takes action with weathering agency like rainfall, evaporation and temperature, and changes environmental and hydro-geological conditions within the slope soil. The paper, by countering the characteristic of highway engineering for the cutting slope to expansive soil, summarizes the past protective measures for cutting slope of expansive soil. In order to maintain the relative stability of natural moisture content of slope soil, keep the relative integrity of its structure, remain its enough shear strength and prevent swelling deformation and swelling force of expansive soil from being destroyed, the paper put forward a new method of using DAH mixed solution to improve the surface soil of expansive soil slope according to the past information and experience of dealing with the cutting slope of expansive soil. The chemical reaction will bring about between DAH mixed solution and the elements of expansive soil to produce ion exchange, so as to change the property of the surface expansive soil into normal soil. Besides, the paper makes full use of the past methods to cope with the cutting slope of expansive so that it can look for a better new method to deal with the cutting slope. In fact, the new method not only makes full use of expansive soil and economizes the engineering investment, but also afforest the slope and cause it to coordinate with the surroundings. In allusion to the characteristic of the cutting slope of expansive soil, the paper tries to put forward an economy as well as reasonable project for dealing with the cutting slope of expansive soil, and provides reference basis for building highway in the area of expansive soil. |
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| Keywords: | swelling clay cutting slope big hole framework without sand DHA mixing liquid |
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