中小型耙吸船高效疏浚粉土关键技术
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摘要
粉土具有密实性好、板结程度高、单颗粒比重较轻的特点,而以舱容4 500 m3为代表的中小型耙吸挖泥船因结构设计和装备配备等因素,针对粉土的疏浚施工,经常导致耙头入土深度不足,吸入浓度低,及在泥舱中沉降速度慢,装舱效率低等问题。通过研究耙头、耙齿、高压冲水、泥泵等关键疏浚挖掘机具,提高粉土进舱浓度,同时,优化装舱时间,提高粉土装舱效果,从而实现了提高中小型耙吸船疏浚粉土施工效率的目的。
Silt with the characteristics of high compactness and compaction,light weight of single particles is difficult to be dredged for medium and small trailing suction hopper dredger represented by the cabin of 4 500 m3. Due to factors such as structural design and assembly equipment, construction of dredging silt often leads to insufficient depth of soil, low inhalation concentration, slow settling velocity in spoil hopper, and low efficiency of loading. Through researching key dredging excavators such as draghead, draghead teeth, high-pressure jet, mud pump and so on, the inhalation concentration of silt is improved. At the same time, the effect of silt loading is improved through optimizing the loading time. Thereby, the purpose of improving the efficiency of dredging silt construction for medium and small trailing suction hopper dredger is achieved.
Silt with the characteristics of high compactness and compaction,light weight of single particles is difficult to be dredged for medium and small trailing suction hopper dredger represented by the cabin of 4 500 m3. Due to factors such as structural design and assembly equipment, construction of dredging silt often leads to insufficient depth of soil, low inhalation concentration, slow settling velocity in spoil hopper, and low efficiency of loading. Through researching key dredging excavators such as draghead, draghead teeth, high-pressure jet, mud pump and so on, the inhalation concentration of silt is improved. At the same time, the effect of silt loading is improved through optimizing the loading time. Thereby, the purpose of improving the efficiency of dredging silt construction for medium and small trailing suction hopper dredger is achieved.
引文
[1]尹纪富,洪国军,江帅,等.耙吸挖泥船耙头固定体喷嘴流场特性数值分析[J].中国港湾建设,2016,36(5):9-12.YIN Ji-fu, HONG Guo-jun, JIANG Shuai, et al.Numerical simulation on flow characteristics of water jet nozzle for draghead[J]. China Harbour Engineering, 2016, 36(5):9-12.
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[5]郑金龙,沈伟平,韩政,等.耙吸船施工效率影响因子的分析及最佳参数的选定[J].中国港湾建设,2016,36(12):54-56.ZHENG Jin-long, SHEN Wei-ping, HAN Zheng, et al. Analysis of impact factor on construction efficiency of TSHD and the selection of optimum parameter[J]. China Harbour Engineering, 2016, 36(12):54-56.
[6]朱时茂,郭素明.长江南京以下12.5 m深水航道一期疏浚中的难点与对策[J].水运工程,2016(4):7-12.ZHU Shi-mao, GUO Su-ming. Construction difficulties and countermeasures of dredging project in the first phase of 12.5 m deepwater channel of the Yangtze River below Nanjing city[J]. Port&Waterway Engineering, 2016(4):7-12.
[2]刘功勋,洪国军,张晴波,等.疏浚饱和密实粉土剪胀特性及其对耙齿切削阻力的影响[J].水运工程,2017(3):16-21.LIU Gong-xun, HONG Guo-jun, ZHANG Qing-bo, et al. Shear dilation characteristic of dredging saturated dense silt soil and effect on cutting resistance of rake tooth[J]. Port&Waterway Engineering, 2017(3):16-21.
[3]沈伟平,孙雪梦,赵学,等.耙头高压冲水改进技术[J].水运工程,2012(3):159-162.SHNE Wei-ping, SUN Xue-meng, ZHAO Xue, et al. Improvement technology of high-pressure jet at draghead[J]. Port&Waterway Engineering, 2012(3):159-162.
[4]庄海飞,杨晨,胡京招. 4 500 m3耙吸挖泥船用高效泥泵的研究与应用[J].中国港湾建设,2017,37(1):63-67.ZHUANG Hai-fei, YANG Chen, HU Jing-zhao. Research and application of efficient dredge pump for 4 500 m3trailing suction hopper dredger[J]. China Harbour Engineering, 2017, 37(1):63-67.
[5]郑金龙,沈伟平,韩政,等.耙吸船施工效率影响因子的分析及最佳参数的选定[J].中国港湾建设,2016,36(12):54-56.ZHENG Jin-long, SHEN Wei-ping, HAN Zheng, et al. Analysis of impact factor on construction efficiency of TSHD and the selection of optimum parameter[J]. China Harbour Engineering, 2016, 36(12):54-56.
[6]朱时茂,郭素明.长江南京以下12.5 m深水航道一期疏浚中的难点与对策[J].水运工程,2016(4):7-12.ZHU Shi-mao, GUO Su-ming. Construction difficulties and countermeasures of dredging project in the first phase of 12.5 m deepwater channel of the Yangtze River below Nanjing city[J]. Port&Waterway Engineering, 2016(4):7-12.