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首页> 外文会议>Association of State Dam Safety Officials annual conference >DESIGN MODIFICATIONS AND REHABILITATION OF EXISTING LEVEE PROTECTING A WASTEWATER TREATMENT PLANT
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DESIGN MODIFICATIONS AND REHABILITATION OF EXISTING LEVEE PROTECTING A WASTEWATER TREATMENT PLANT

机译：现有污水处理厂水位的设计修改和修复

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CDM Smith was retained by the Narragansett Bay Commission (NBC) to perform a geotechnical evaluation to rehabilitate the flood protection levee at the Bucklin Point Wastewater Treatment Facility (BPWWTF) located in East Providence, Rhode Island. The facility was constructed in 1952 on a low-lying peninsula on the east bank of the Seekonk River. In 1973, tidal flats in the Seekonk River were filled to expand the site, and the flood protection levee was built around the perimeter of the expanded peninsula to protect the facility from a 100-year storm event. The levee consists of an approximately 3,000-foot-long, U-shaped, earthen fill, levee with exposed heights ranging between about 8 and 19 feet. Two stormwater drainage basins are located at the landside toe of the levee. At each stormwater drainage basin, an 18-inch-diameter pipeline passes under the levee through a sluice gate chamber to an outfall at the riverside toe. The NBC had included an evaluation of the Bucklin Point levee system and facility system upgrades in a design contract with CDM Smith in order to continue to protect the BPWWTF from significant storm events. After a major storm event caused serious damage to another Rhode Island wastewater treatment plant that was protected by a levee, the NBC's position was further reinforced. CDM Smith performed the evaluation in two phases. Phase one included a field inspection to document deficiencies and areas of concern along the existing levee. CDM Smith also performed a topographic survey of the levee to evaluate the level of protection based on the Federal Emergency Management Agency 2009 flood insurance rate map for the Seekonk River. Phase two of the evaluation included a subsurface investigation to evaluate slope stability, seepage, and settlement along the levee. CDM Smith prepared design contract documents for the rehabilitation of the levee. Improvements included raising the crest of the levee by approximately 3 feet, restoring and fortifying riverside slopes with riprap, and building out the landside slope. Improvements also included gabion walls to support the built-out landside slope to maintain the storage volume of two adjacent stormwater drainage basins. The construction for the rehabilitation of the levee lasted about nine months from February to October 2012.
机译：CDM Smith被纳拉甘塞特湾委员会（NBC）聘用，对位于罗得岛州东普罗维登斯的巴克林点废水处理设施（BPWWTF）的防洪堤进行了岩土工程评估。该设施建于1952年，位于Seekonk河东岸的一个低洼半岛上。 1973年，塞孔克河（Seekonk River）的潮滩被填平，以扩大该地点的位置，并在扩大后的半岛周边修建了防洪堤，以保护该设施免受100年的暴风雨袭击。堤防由大约3,000英尺长的U形泥土填充的堤防组成，露出的高度在8到19英尺之间。在堤岸的脚趾处有两个雨水流域。在每个雨水流域，一条18英寸直径的管道穿过大闸下方的闸门室，到达大堤的下游河口脚趾。 NBC在与CDM Smith的设计合同中包括对Bucklin Point堤防系统和设施系统升级的评估，以便继续保护BPWWTF免受重大风暴事件的影响。在一场重大的风暴事件严重破坏了另一座受堤坝保护的罗德岛废水处理厂之后，NBC的地位得到了进一步加强。 CDM Smith分两个阶段进行了评估。第一阶段包括现场检查，以记录沿现有堤坝的缺陷和关注区域。清洁发展机制史密斯还对堤防进行了地形调查，以根据联邦紧急事务管理局2009年塞康克河洪水保险费率地图评估保护水平。评估的第二阶段包括地下调查，以评估边坡的稳定性，渗流和沿堤岸的沉降。 CDM Smith准备了堤坝修复的设计合同文件。改进措施包括将堤防的顶峰提高约3英尺，用riprap修复和加固河边坡度，以及修建岸边坡度。改进措施还包括石笼墙，以支撑已建好的陆坡，以保持两个相邻雨水排放盆地的蓄水量。从2012年2月至2012年10月，堤防修复工程历时约9个月。

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