Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stabilization of Rainfall-Induced Slope Failure and Pavement Distresses Using Recycled Plastic Pins and Modified Moisture Barrier
In many parts of Texas, particularly North Texas, pavements are constructed on highly plastic expansive clay subgrades with fill embankment slopes. Desiccation cracks often appear in these pavements due to cyclic swelling and shrinkage of the expansive clayey subgrade. These cracks offer a suitable gateway for rainwater infiltration which ultimately leads to shallow slope failure. The objective of the current paper is to propose a two-step mechanism to combat rainfall-induced shallow slope failure at U.S. Highway 287 located in Midlothian, Texas. The two-step mechanism includes the installation of recycled plastic pins for lateral stabilization of the slope followed by the installation of a modified moisture barrier for preventing the infiltration of rainwater through desiccation cracks. To evaluate and compare the effectiveness of the proposed two-step mechanism, three sections were installed in July 2017: the control section, the section with recycled plastic pins only, and the section with modified moisture barrier and recycled plastic pins. The performance of these sections was monitored using moisture sensors installed at different depths and an inclinometer installed at each section. Moreover, to evaluate the moisture variation at each of these sections, resistivity imaging (RI) was conducted on a monthly basis. Based on the analysis of preliminary results, the slope section with the modified moisture barrier showed insignificant moisture variation in subgrade soil while, for the section without the modified moisture barrier, the moisture variation ranged between 10% and 35%. In addition, a lateral deformation of 8.23 mm was observed in the slope section with recycled plastic pins and modified moisture barrier while a lateral deformation of 25.25 mm was observed in the section without recycled plastic pins and modified moisture barrier.
Stabilization of Rainfall-Induced Slope Failure and Pavement Distresses Using Recycled Plastic Pins and Modified Moisture Barrier
In many parts of Texas, particularly North Texas, pavements are constructed on highly plastic expansive clay subgrades with fill embankment slopes. Desiccation cracks often appear in these pavements due to cyclic swelling and shrinkage of the expansive clayey subgrade. These cracks offer a suitable gateway for rainwater infiltration which ultimately leads to shallow slope failure. The objective of the current paper is to propose a two-step mechanism to combat rainfall-induced shallow slope failure at U.S. Highway 287 located in Midlothian, Texas. The two-step mechanism includes the installation of recycled plastic pins for lateral stabilization of the slope followed by the installation of a modified moisture barrier for preventing the infiltration of rainwater through desiccation cracks. To evaluate and compare the effectiveness of the proposed two-step mechanism, three sections were installed in July 2017: the control section, the section with recycled plastic pins only, and the section with modified moisture barrier and recycled plastic pins. The performance of these sections was monitored using moisture sensors installed at different depths and an inclinometer installed at each section. Moreover, to evaluate the moisture variation at each of these sections, resistivity imaging (RI) was conducted on a monthly basis. Based on the analysis of preliminary results, the slope section with the modified moisture barrier showed insignificant moisture variation in subgrade soil while, for the section without the modified moisture barrier, the moisture variation ranged between 10% and 35%. In addition, a lateral deformation of 8.23 mm was observed in the slope section with recycled plastic pins and modified moisture barrier while a lateral deformation of 25.25 mm was observed in the section without recycled plastic pins and modified moisture barrier.
Stabilization of Rainfall-Induced Slope Failure and Pavement Distresses Using Recycled Plastic Pins and Modified Moisture Barrier
Sapkota, Anuja (Autor:in) / Ahmed, Asif (Autor:in) / Pandey, Pratibha (Autor:in) / Hossain, Md. Sahadat (Autor:in) / Lozano, Nicasio (Autor:in)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 237-246
21.03.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
| British Library Conference Proceedings | 2019
Slope Stabilization Using Recycled Plastic Pins
| British Library Online Contents | 2016
Slope Stabilization Using Recycled Plastic Pins
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Slope Stabilization Using Recycled Plastic Pins
| Online Contents | 2016