Abstract : the qiantang estuary with violent hydrodynamic conditions is well known for its tidal bore . the regulation of the estuary in the past , especially the progress since the founding of new china are reviewed . the principles of the regulation and planning of the qiantang estuary formulated in 1960s are expounded , i . e . , to narrow the river to reduce the tidal prism , and to increase the ratio of the river flow to tidal discharge . the experience of estuary regulation / reclamation is summarized , especially the engineering measures to protect the groin head and to use polder dykes as sea defense works . finally , the effect is analyzed of the large - scale constraction / reclamation in the estuary on the tides , flooding high water level , estuary bed and the northern deep waterway in the hangzhou bay 文摘:以涌潮闻名的钱塘江河口,动力强劲,破坏力极大.回顾钱塘江河口历代治理情况,重点记述1949年以来治理工作的进展,论述60年代提出的钱塘江河口治理规划的指导思想,即缩窄江道,减少进潮量,增大山潮水比值的整治原则.总结整治规划实施过程中治江围涂经验,特别是“以围代坝”和丁坝坝头保护等工程措施.分析钱塘江河口大规模治江围涂后对钱塘江河口潮汐、洪水位、河床以及杭州湾北岸深槽的影响
The potential for water - saving can be exploited rationally by the measures , such as engineering measure , adjustment of crop planting structure , exploitation of shallow groundwater , improvement of the surface irrigation manner , development of advanced irrigation technology and improvement of water - saving management in the irrigation area 灌区节水潜力有:采取工程措施、调整作物种植结构、开采浅层地下水、改进地面灌溉方式、发展灌水技术、提高灌区节水灌溉管理水平等。
The stability of the section of the ash dam situated in a seismic zone for matou power plant is analyzed with the total seismic stress approach of shear strength herein , and then the engineering measures to enhance the seismic stability of the dam are studied as well ; which can provide a reference basis for the seismic design of the dam 摘要采用地震总应力抗剪强度分析法对粉煤灰坝进行了断面稳定计算分析,研究了提高马头发电总厂贮灰坝地震稳定性的工程措施,为坝体的抗震设计提供参考依据。
The results showed that : the integrated ecological risk was presented symmetrically along brahmaputra , and was mitigated from valley farming area to mountain pastoral area ; the hazards of main risk sources to risk suffer in each sub - region was differently , drought was the common risk source and imperils farming and stock raising severely ; aimed at enhancing the ability of fighting drought , controlling flood and stabilizing sand engineering measures should be taken steps to prevent those hazards ; mountain hazards must be controlled in resident area and along arterial traffic ; manual work should be done to void hail in those area where hails attacked heavily ; there is need to promulgated risk knowledge to herdsmen for strengthening their risk consciousness and improve the ability of preventing risk and self - help after hazards happened in the pasturing area 扎囊县综合生态风险沿雅鲁藏布江呈现对称型分布,并由河谷农业区向高山牧业区逐渐降低;各亚区的主要风险源对风险受体的危害强度差异较大,干旱是共同的风险源,造成的农牧业生产损失最为严重;抗风险措施主要有在河谷地带采取工程措施以提高抗旱、防洪和固沙能力,在半山台地加强治理居民点及交通沿线的山地灾害,在多雹区进行人工消雹;在高寒牧区向牧民传播风险知识,以加强其风险意识,提高规避风险和灾后自救能力。
Based on an analysis of some new advances in seismic research of arch dams , some suggestions were made , such as to further perfect the study of seismic response of the darn , water and foundation integrated system by means of dynamic analysis technique , to renew the idea of seismic prevention , to establish the uneven seismic model , to enhance the effectiveness research on aseismatic engineering measures , etc 在分析高拱坝抗震研究最新进展的基础上,提出进一步完善用动力分析技术研究坝、水、地基综合系统的地震响应、更新抗震设防理念、建立不均匀地震动模型、加强抗震工程措施的有效性研究等建议。
During recent decade and more , major and super floods have taken place frequently in the yangtse river and huai river . the natural phenomenon of flooding is inevitable . it is not a surefire plan only to take engineering measures for flood control while climatic variation is far from being known 近十多年来在我国长江、淮河流域连续不断发生的大洪水或特大洪水再次向我们展示了这样一个道理,洪水是一种自然现象,当环球大的气候因素及其变化规律远未被认识时,试图仅依靠工程措施来控制洪水并非万全之策,逐步运用非工程措施,常常能起到“以柔克刚” 、 “以弱胜强”之功效。
Engineering measures for pre - consolidation and treatment of cut soft foundation with high pressure jet grouting pile or anti - slide pile are presented , together with engineering measures for consolidation of inclined soft embankment foundation with gravel pile and lateral restrained pile , and the methods of design , construction are also introduced in detail . 6 提出了高压旋喷桩或抗滑桩预加固整治堑软基的工程措施;提出了采用碎石桩和侧向约束桩加固倾斜基底路堤软基的工程措施,并对设计、施工、检测进行了详细介绍; 6
The crack problem of hydraulic culvert and sluice engineering concrete is rather thoroughly studied in the present paper . concluded the shape of crack , analyzed the mechanism of cracking , and researched on the engineering measure for prevent from the cracking in this paper . mathematical model for kinds of engineering measures is calculated ; results from all kinds of measures are obtained 本文就水工涵闸工程混凝土的裂缝问题进行了详细的研究,总结了裂缝的形式,分析了裂缝的形成原因,对控制裂缝的工程措施进行了深入的研究,运用数学模型对种种工程措施进行计算,量化分析其效果。