Spur dike, for inland waterway improvement, not connected with embankment

Abstract

The invention discloses a spur dike, for inland waterway improvement, not connected with any embankment. The spur dike not connected with any embankment is structurally characterized in that dike root sections of an ordinary spur dike are removed and the length of a dike body is correspondingly reduced. The spur dike not connected with any embankment is composed of two dike heads and a middle dike body section. It is suitable that the plane line type of the spur dike not connected with any embankment is a downward-angled spur dike or a downward-angled spur training dike. The positions of the dike heads can meet requirements for ordinary spur dikes. The width of a near-embankment notch section meets requirements for seabed stability, the longitudinal slope of a near-embankment notch section is properly smaller than that of a dike head of an ordinary spur dike so as to reduce the scouring depths of the dike heads, bottom protection measures need taking if the scouring depths are large, and other dike bodies are as same as dike bodies of the ordinary spur dike in structure. Test results put forwards after waterways of outlet swallow regions of a Xiang River Tongguan beach indicate that compared with a spur dike connected with embankments, the improvement effect is the same, but the length of the dike body is obviously reduced.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and in particular relates to a non-bank spur dam used for regulation of inland waterways. Background technique [0002] The shoal is the main object of waterway regulation. The spur dam and Dingshun dam are often used to control water diversion in inland river shoal regulation. The height of the dam is between the middle water level and the lowest navigable water level. The essence of the project is when the flood lands In the final stage, the scour capacity is improved to reach the guaranteed voyage depth when the minimum navigable water level is reached. [0003] A spur dam refers to a "T"-shaped water and soil building that is connected to the embankment at one end. The code requires that the dam body be connected to the river bank longitudinally at a certain slope to form the dam root. When the water level is below the water level at the head of the dam, the water flows back to t...

AI Technical Summary

Problems solved by technology

However, in large mountainous rivers such as the Chuanjiang River and the Xiangjiang River, when the Shushui spur dike is built on the shoal river section with a wide side beach and a high beach elevation, in order to meet the code requirements, the root of the spur dike is connected to the river bank, and the length of the spur dike is often or when the navigable shallow area is long, the length of the water constriction of one spur dike is limited, and multiple spur dikes are often arranged to form a spur dike group. Due to the influence of the upstream spur dike cover range, the downstream spur dikes can only protrude The length of the dam body in the shielding range of the upstream dam body is effective, and the river width in the shallow area is narrow.

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