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“rosacaraciolo大战”-译文小记

广西首次在市政引rosacaraciolo大战水隧洞工程应用盾构技术

来源: 澎湃新闻
2024-12-04 10:32:18

最佳回答

“rosacaraciolo大战”广西首次在市政引rosacaraciolo大战水隧洞工程应用盾构技术

  中新rosacaraciolo大战网南宁12月2日电 (林浩rosacaraciolo大战 沈嘉鹏 杨杰城)12月2日,南宁市邕江上游二期引水和应急引水工程隧洞工程盾构机顺利始发,这也是广西首次在市政引水隧洞工程中应用盾构技术。

图为工作人员在组装调试盾构机。林浩 摄

  当前,南宁市正加快建设面向东盟开放合作的国际化大都市,稳定的供水对城市发展极为重要。作为广西壮族自治区层面统筹推进的重大项目之一,邕江上游二期引水工程将在邕江上游(左江、右江)分别取水,修建左江泵站、右江泵站和石埠泵站3座泵站,改造老口泵站,同时修建总长度为28.2公里的供水管线,总引水规模达268万立方米/日。

图为项目施工现场。沈嘉鹏 摄

  上述工程由南宁建宁水务投资集团有限责任公司管理建设,中铁四局集团有限公司承建任务包括9座工作井、3段盾构区间共计12.6千米。

  中铁四局集团邕江引水二期项目工程部部长赵谷雨接受采访时表示,该工程隧洞不仅需要穿越复杂的地质结构,还面临着下穿右江、溶洞,既有高速公路线等构建物,盾构施工等多重挑战。对此,工程采用大口径长距离输水隧洞施工工艺。

  此次始发的“井冈山号”盾构机全长155米,开挖直径为5.68米,能够实现水平250米转弯半径,适用于越江隧道,能克服地层含水量大、上方有水体等特殊环境。盾构推进时开挖下来的渣土,可以通过泥水循环系统泵送到地面进行分离后直接外运。

图为始发盾构工作井。沈嘉鹏 摄

  为确保盾构机顺利始发,该工程项目部技术团队针对掘进线路上的溶洞、上软下硬、穿邕江等不良地质进行超前谋划,确定采用土压、泥水双模盾构始发的施工方案,组装班组轮流值班,确保盾构机吊装下井、组装调试、始发条件验收等关键工序有序衔接,提前达到安全始发各项工作要求。

  据悉,邕江上游二期引水和应急引水工程项目建成后,南宁市将率先在国内建成同规模联合运行的双水源体系,形成“两江并举,互为备用”的原水取水格局,在应急情况下实现单边引水,保障城市原水系统安全运行。同时,项目将原来位于城区中心六个取水口,全部上移至三江口上游,缓解了城市开发建设和水源地保护的矛盾。(完)

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