Research On Construction Technology Of Heishazhou Waterway Regulation Engineering In Downstream Of The Yangtze River

In waterway regulation engineering practice, the stability of the dam body often relies on the stability of bottom protection. All the bottom protection programs adopted vertical water sink drainage construction in the middle and lower reaches of the Yangtze River, witch used Latent dam latent to strengthen dam bottom. Traceability damage exists in the downstream of the dam, part of the body destruction has come close to the dam.At present, flap form are used to lead the mattress into the river in the underwater guide configuration process. Due to the limited length of the ship guide arrangement and the influence of the structure and flow, Phenomenon of rows, tear and curly configuration, floating row and row off position occurs easily with increasing of water depth and velocity, witch will cause the quality can’t meet the design requirements, arrangement influence waterway regulation effect, but also greatly increase the construction difficulty, lead to a greater risk of construction safety and cost greatly increased. With the development of the construction of the middle and lower reaches of the Yangtze river waterway, the waterway regulation demand is higher and higher, to improve the existing technology and the quality of the thoughtful arrangement is of great significance.(1)troducingthe general situation of the project, the engineering bottom protection and body structure and technical requirement; the initial development of the test plan, mainly introduces the experimental principle, experimental scheme and the selected test area. And that the initial development of the test plan, mainly introduces the experimental principle, experimental scheme and the selected test area.(2)To analysis the body force when laying soft mattress,to calculate soft mattress force when the ship is moving in the dynamic water and static water. in the process of stress analysis, due to lack of detailed velocity data, the effects of dynamic water pressure for soft mattress only be calculated generally, so the results may have certain error. From the theory of single wide row body force was calculated, and a certain reference value on the stress of the size of the order of magnitude was given.(3)The layout of test tools and performance has introduced in this paper. Through concrete construction sequence, external coordination, and the concrete construction arrangement, The well sinking construction process technology was proposed. For row body, ship and external conditions, monitoring the main content, describes a method and apparatus for monitoring, test of main steps and test data acquisition, etc., risk analysis and security measures introduced, make the safety in the process of test plans.(4)Introduces the field data acquisition, according to the actual situation of the adjustment of the predetermined scheme, obtained the relevant data. By the different water depth and under the condition of well sinking, the test results were compared and analyzed. To check the stress of well sinking, according to the calculation and measurement of soft mattress of maximum stress value, under different conditions are basically in the same order of magnitude, the measured maximum tension arrangement also suffered the basic theoretical calculations within the scope of the results,indicating that the theoretical calculation and the force measured on the overall scene is consistent, the results also reflect the test before the on-site test of theoretical calculations indicate play a role.