冠诚清淤机械”
清淤船施工前，沿开挖河槽两岸各布置一条控制导线，各断面设立固定的醒目控制桩，并用不同颜色的彩旗定出河道左右开口线，以保证河道中心线偏移值不超过设计要求。在绞刀架杆上安装水尺控制深度，随时观测并及时调整挖河深度。
 
1、开挖方向的确定：为分析水流方向对挖泥船施工效率的影响，施工过程中分别进行了顺、逆流开挖试验，结果表明，采用顺流开挖挖泥船效率较低，含沙量约为7%~10%（体积比，下同），而逆流开挖效率较高，含沙量达10%~12%，最高达17%。并且在顺流开挖时，由于水流压力，水上输泥管线易打弯，施工受到一定影响；在逆流开挖时，管线畅通。
 
2、边坡开挖：设计开挖边坡1：5，根据疏浚施工技术规范，采用下超上欠的阶梯开挖法，自然塌落形成边坡，坡比接近1：4~1：6之间。

Crown-dredging machinery. "
Before dredging ship construction, excavation along the river channel on both sides of the layout of a control wire, each section of the eye-catching set up fixed control pile, and set about opening line river with different colored flags, to ensure that the river centerline offset value does not exceed the design requirements . In twist turret control the depth of water gauge rod installed, ready to observe and to adjust the depth of dredging.
 
1, to determine the direction of the excavation: To analyze the impact on the flow direction of the dredger working efficiency, the construction process were carried out smoothly, countercurrent excavation tests, the results show that the lower down the river dredger excavation efficiency, including sand about 7% to 10% (by volume, the same below), while the higher efficiency counterflow excavation, sediment concentration of 10% to 12%, up to 17%. When excavation and downstream, due to the water pressure, water transmission pipeline mud easily bent, construction affected to some extent; excavation at reflux, the pipeline flow.
 
2, the slope excavation: the design of excavation slope of 1: 5, according to dredging technical specifications on the use of ultra owe ladder excavation method, the natural formation of the slope collapse, slope ratio close to 1: 4 to 1: 6 between.

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