塑料排水板弯曲通水量对比试验研究  

Comparative Study on Flow Capacity of Prefabricated Vertical Drains in Different Bending Forms

作　　者：王婧[1,2] 苏林王[1,2] 李涛[1,2] 

机构地区：[1]中交四航工程研究院有限公司,广州510230 [2]中交交通基础工程环保与安全重点实验室,广州510230

出　　处：《长江科学院院报》2017年第2期17-22,40,共7页Journal of Changjiang River Scientific Research Institute

摘　　要：塑料排水板是排水固结加固地基中水分排出的竖向通道。地基处理过程产生的大幅沉降引起排水板弯曲,需要验证其对通水量的对应减小幅值,及对加固效果的影响。通过固定铁框架模型,人为弯曲排水板以简单模拟排水板在工作中的弯曲变形,分析对比4类具有代表性的塑料排水板(常规分离式、防淤堵分离式、常规整体式、防淤堵整体式)在不同弯曲情况下的通水量。研究结果表明:相同的弯曲形式下,常规整体式排水板的通水性能最佳,其次为防淤堵整体式排水板,再次为防淤堵分离式排水板,常规分离式排水板通水量最低;影响塑料排水板通水量的主要因素为排水板芯板、滤膜及弯折形式。Prefabricated Vertical Drain（ PVD） is a vertical channel of water discharge in foundation treated by drainage and consolidation. As the large settlement caused by foundation treatment results in the deflection of PVD,the corresponding decrease of flow capacity and reinforcement effect caused by the deflection of PVD should be studied. By building fixed iron frame model,PVDs were bended artificially to simulate the bending deformation in real working condition. On this basis,the water discharge capacities of four representative PVDs（ conventional type with separated filtration fabrics,anti-silting type with separated filtration fabrics,conventional type with integral filtration fabrics,and anti-silting type with integral filtration fabrics） in different bending conditions were compared.Results indicate that conventional integral drainage board has the best drainage performance in the same bending form,followed by that of anti-silting integral type,filter-separated anti-silting type,and filter-separated conventional type. Core veneer,filtration fabric and bending angle are main factors influencing the flow capacity of PVD.

关 键 词：塑料排水板 弯折形式 通水量 对比试验 损失系数 

分 类 号：TU472.33[建筑科学—结构工程]