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Assessment of innovative dented sheet liner on the improvement of hydraulic properties of pervious concrete pile
Engineering Science and Technology, an International Journal ( IF 5.7 ) Pub Date : 2021-05-14 , DOI: 10.1016/j.jestch.2021.04.015
U. Umanath , Kasinathan Muthukkumaran

The Pervious Concrete Pile (PCP) is a technique that has emerged as an innovative method to improve radial consolidation and the bearing capacity of soft soils. The PCP, a stiffer vertical column (pile), has voids on the surface that accelerate the radial consolidation and eventually improve soft soils' bearing capacity. Since the PCP is stiffer material, the performance does not depend on the confined soil, unlike other drains. As the rate of radial consolidation hinges on the drain's hydraulic conductivity, ensuring the permeability of PCP along its total length is essential. An innovative method of dented sheet liner has been introduced in this study to improve the hydraulic conductivity of PCP. This method was introduced to create surface roughness and regular voids along the length of PCP. Malleable material like aluminium has been dented with specified patterns as a liner on the inner surface and introduced along with conventional formwork, which shall be removed after the concrete's final setting time. A series of laboratory experiments such as compressive strength, split tensile strength, porosity, and falling head permeability tests were performed on PCP cast using dented sheet liners. The results were compared with the conventional PCP properties to establish the efficiency of dented sheet liner in improving the hydraulic conductivity of pervious concrete. The results show that using dented sheet liners, the hydraulic properties porosity and permeability of PCP have been increased up to 22.5% and 79%, respectively, with minimum reduction in the strength parameters.



中文翻译:

新型凹板衬砌改善透水混凝土桩水力性能的评价。

透水混凝土桩(PCP)是一种新兴技术,可以改善径向固结和软土的承载力。PCP是一种较硬的垂直柱(桩),其表面具有空隙,可加快径向固结并最终改善软土的承载能力。由于PCP是较硬的材料,因此其性能不取决于密闭土壤,这与其他排水设备不同。由于径向固结速率取决于排水管的水力传导率,因此确保PCP沿其总长度的渗透性至关重要。这项研究中引入了一种创新的凹板衬里方法,以提高PCP的水力传导性。引入此方法可在PCP的整个长度上产生表面粗糙度和规则的空隙。诸如铝之类的可延展材料已在内部表面上以特定图案作为衬里进行压凹,并与常规模板一起引入,应在混凝土最终凝固后将其去除。使用凹板衬垫对PCP铸件进行了一系列实验室实验,例如抗压强度,抗拉强度,孔隙率和落头渗透性测试。将结果与常规PCP性能进行比较,以建立凹陷的薄板衬板在改善渗透混凝土的水力传导性方面的效率。结果表明,使用凹入的薄板衬板,PCP的水力学孔隙率和渗透率分别提高了22.5%和79%,而强度参数的降低却最小。

更新日期:2021-05-14
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