Underwater level throwing base construction method
A construction method and water depth technology, applied in water conservancy engineering, marine engineering, infrastructure engineering and other directions, can solve the problems of affecting the construction progress, endangering the safety of construction personnel and machinery, collapse of the embankment head, etc., to achieve the effect of reducing the loss of throwing materials
Inactive Publication Date: 2006-09-13
中国长江三峡工程开发总公司
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Problems solved by technology
[0002] In the construction process of hydropower stations, deep water closure is an important project. Through the closure model test, it was found that when the dike was occupied, a large-scale collapse occurred at the head of the embankment. This not only affects the construction progress, but also endangers the safety of construction personnel and machinery. Safety
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Embodiment Construction
[0006] According to the test to determine the drift characteristics of the throwing material in moving water to determine the accurate positioning of the throwing ship. Different construction throwing ships have different drift characteristics.
[0007] Try to use a large-capacity throwing ship for one throwing to ensure that the coarsening degree of gravel meets the design requirements. Since the throwing material forms a certain range of coarsening area at the bottom of the bed, according to the single-vessel throwing model test results and the designed underwater throwing filling range, underwater forming and other requirements, when organizing construction throwing, first of all, it should be avoided. Accumulative throwing at the same place; secondly, considering the inconvenience of frequently moving the ship’s position during specific construction, if the two throwing points forward and backward along the direction of water flow are thrown alternately, so that the coarse...
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The invention discloses a construction method for underwater horizontal throwing -bottom filling, comprising main steps of: according to design requirements, determining a throwing range, measuring water flow velocity and depth in the throwing region, and determining the position of a throwing ship according to the velocity and depth, where the throwing ship makes dislocated throwing in a high-low ridge throwing mode. It throws sand gravel to riverbed at deep water, which reduces end collapse of cut-off prop bank constructed on the riverbed; can reduce stratification of stones of different grain sizes in the sinking course by adopting a large-ton ship to primarily throw large amounts of sand gravel underwater; makes materials accurately reach preset riverbed by reasonable control of throwing positions according the water flow velocity and depth; and can reduce material loss in the high-low ridge throwing mode.
Description
technical field [0001] The invention relates to a construction method of a water conservancy project, in particular to a construction method for underwater flat throwing to lay the bottom. Background technique [0002] In the construction process of hydropower stations, deep water closure is an important project. Through the closure model test, it was found that when the dike was occupied, a large-scale collapse occurred at the head of the dike, which not only affected the construction progress, but also endangered the safety of construction personnel and machinery. Safety. The dike collapse problem is a prominent phenomenon in large water depth and low flow rate interception. Contents of the invention [0003] The object of the present invention is to provide a kind of throwing stone slag and gravel material in moving water. The construction method of lower flat throwing base. [0004] The object of the present invention is achieved in the following way: a construction...
Claims
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Inventor 戴会超曹广晶张超然尹庭伟
Owner 中国长江三峡工程开发总公司