CAJ | 학술논문

针对太仓至南通河段两个重点碍航河段--通州沙水道和白茆沙水道的碍航特性，实施长江南京以下12.5 m深水航道一期工程，目标使12.5 m深水航道从目前的太仓港上延到南通港。通过动床物理模型试验对该一期工程的平面方案在平常水沙2a和丰水年条件下进行了对比研究。该工程方案的通州沙工程能起到较明显的沙体守护效果，通州沙顺堤和齿坝能遏制通州沙及狼山沙沙体左缘的冲刷后退，并能遏制狼山沙窜沟的冲刷发展，且狼山沙东水道碍航浅段水深条件有所改善。白茆沙工程亦能起到较明显的沙体守护效果，能遏制沙头冲刷后退的趋势。该工程对白茆沙头部南侧的小沙包有较明显冲刷作用，白茆沙南水道进口段有一定程度冲刷，航行条件改善。对比分析表明方案在1a丰水条件下对河床的调整趋势与两年平常水沙年条件下的试验结果基本一致，但工程效果略有减弱，总体上来说该工程方案在两种水文条件下均可以达到工程建设目标。
침대태창지남통하단량개중점애항하단--통주사수도화백묘사수도적애항특성，실시장강남경이하12.5 m심수항도일기공정，목표사12.5 m심수항도종목전적태창항상연도남통항。통과동상물리모형시험대해일기공정적평면방안재평상수사2a화봉수년조건하진행료대비연구。해공정방안적통주사공정능기도교명현적사체수호효과，통주사순제화치패능알제통주사급랑산사사체좌연적충쇄후퇴，병능알제랑산사찬구적충쇄발전，차랑산사동수도애항천단수심조건유소개선。백묘사공정역능기도교명현적사체수호효과，능알제사두충쇄후퇴적추세。해공정대백묘사두부남측적소사포유교명현충쇄작용，백묘사남수도진구단유일정정도충쇄，항행조건개선。대비분석표명방안재1a봉수조건하대하상적조정추세여량년평상수사년조건하적시험결과기본일치，단공정효과략유감약，총체상래설해공정방안재량충수문조건하균가이체도공정건설목표。
In view of two obstacle segments of navigation channel from Taicang to Nantong named TZS (Tongzhou shoal) waterway and BMS (Baimao shoal) waterway, the first phase project of 12.5 m deep-water navigation channel project was designed and now is under building, aiming at extending from Taicang to Nantong port. In order to study project effects, movable bed physical model is designed to optimize the project layout by comparing normal-rainfall-sedimentation-two-years and rich-rainfall-sedimentation-year conditions. TZS sub-project has obvious effect to prevent shoal erosion, training dike and tooth groins can prevent washing back of the left edge of TZS and LSS (Langshan shoal), and the erosion development process of scour channel between TZS and LSS can also be prevented. The navigation condition of deep water channel in the East LSS waterway can be improved. BMS sub-project also has obvious effects to prevent shoal erosion as well as to change the backward trend of shoal caused by erosion. Also, small sand bar locating in south channel of BMS which cause navigation obstruction was also significantly eroded due to the projects, navigation condition of the inlet section of south channel of BMS was also improved. Conclusions can be drawn from the study that no obvious difference can be seen between the tests under normal-rainfall-sedimentation-two-years condition and rich-rainfall-sedimentation-year condition. Overall,the project can achieve the goal of engineering construction.