围堰

The paper also shows that the numerical analysis has played a very meaningful role in the cofferdam design. Based on the monitoring data, the feedback analysis and optimization validation of cofferdam is carried out.

再者文章深刻阐述了数值计算在围堰设计中的重要作用，并结合实测资料，分析了二期围堰的工作性状，进行了围堰的反馈分析和优化验证。

The paper elaborates the construction of underwater cofferdam which is based on gravels.

对在砂砾石基础上填筑水下围堰进行了阐述，水下围堰的砂砾石基础采用砂砾石帷幕灌浆进行防渗，从理论、实践等多个方面分析了其可行性。

The final solution will be to set two current blocking piers of 10 m and 18.5 m high respectively at stake 20+151m and 20+300m on the scour-resistant wall and an apron of 200m wide and 50m long starting from the dam toe and close to the cofferdam.

试验结果表明：护坦减轻了下游纵向围堰左侧坝趾处的回流淘刷，隔流墩明显减轻了防冲墙附近河床的冲刷，确保了坝基和下游纵向围堰的安全。

Combined with the practice of the underwater cofferdam of Kangshan great dyke ,the construction methods of bamboo cofferdam and reed cofferdam were summarized.

结合鄱阳湖区康山大堤水下围堰施工的实践，总结了利用当地材料因地制宜修筑竹墙和芦苇水下围堰的施工方法，取得了技术可靠、经济合理的效果，具有一定的借鉴意义

This thesis systematically studies some important subjects in theoretical and applicable aspects, on which the overflow cofferdam needs to solve at present during key water control project construction, such as diversion ways and the type of overflow cofferdam, diversion standard, and the bedding course of the downstream protection slop of concrete slab on overflow cofferdam. Moreover, according to the experiment of hydraulic construction model, the thesis studies the overflow cofferdam and diversion scheme for Qingjiang Shuibuya Hydropower Project.

本文从理论和应用两个方面系统研究了水利枢纽工程施工过水围堰在导流方式及围堰类型、导流标准及围堰下游砼护坡反滤层等方面需要解决的问题，并结合水工模型试验，对清江水布垭水电站工程过水围堰及度汛方案进行研究。

Its function is to surround water by the box sling cofferdam＇s side boards, bottom boards and back-covered concrete.

钢吊箱围堰是桩承台施工的临时围水结构，其作用是通过吊箱围堰的侧板、底板及其上的封底混凝土围水。

On the basis of analysis of practical engineering, the topics such as the structure of cofferdam, treatment of cofferdam edge foot under inclined rock base, cofferdam stability analysis, laying out of anchorage system and the method to determine the bottom sealing concrete thickness are systematically discussed.

基于对实际工程的分析，对双壁钢围堰的构造设计、岩面倾斜情况下围堰刃脚的处理措施、围堰稳定性分析、锚碇系统布置及围堰封底混凝土厚度的确定方法等进行了系统的论述。

In the method, the factors, such as the tide bore variations, swift current at tide ebb and flow, severe changes of muddy riverbed, and details of design and fabrication of the steel cofferdams are considered.

介绍国内某大跨径桥梁深水大体积承台围堰的施工方法，该钢围堰的施工考虑了涌潮变化、涨落潮流速大、淤泥质地状况的河床剧烈变化，以及围堰设计、制作安装。

A new advanced blasting technique in China, delay in hole and sequence out hole blasting technique, was adopted in underwater blasting excavation of guide ditch ahead of water conveyance tunnel at Xiaowan Hydropower Station, thereby the controlling aim of high explosive rate and low single dynamite weight was achieved, the maximal particle vibration velocity was controlled in allowable range, guaranteed the safety of Cofferdam and rock dam and entrance water tower and so on, provided powerful guarantee for the successful guide water of the guide tunnel.

小湾水电站导流隧洞进口围堰堰外引渠水下爆破开挖采用了目前国内较为先进的孔内延时，孔外微差的爆破技术，整个爆破区分为多段起爆，从而达到高单耗，低单响药量的控制目的，将质点的最大振动速度控制在允许范围内，有效保证了围堰、围堰岩埂灌浆帷幕区及进水塔等建筑物的安全，为导流隧洞顺利导流提供了保证。

A new advanced blasting technique in China, delay in hole and sequence out hole blasting technique, was adopted in underwater blasting excavation of guide ditch ahead of water conveyance tunnel at Xiaowan Hydropower Station, thereby the controlling aim of high explosive rate and low single dynamite weight was achieved, the maximal particle vibration velocity was controlled in allowable range, guaranteed the safety of Cofferdam and rock dam and entrance water tower and so on, provided powerful guarantee for the successful guide water of the guide tunnel.

简介： 小湾水电站导流隧洞进口围堰堰外引渠水下爆破开挖采用了目前国内较为先进的孔内延时，孔外微差的爆破技术，整个爆破区分为多段起爆，从而达到高单耗，低单响药量的控制目的，将质点的最大振动速度控制在允许范围内，有效保证了围堰、围堰岩埂灌浆帷幕区及进水塔等建筑物的安全，为导流隧洞顺利导流提供了保证。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了