Waterproof riprap inspection of dike

Abstract

Riprap of river levees underwater detection method was described: positioning using two dual-frequency GPS receiver instantaneous. a set of GPS stations located in the ground, another set of GPS stations in tracking, their receiving antenna cables in fixed detector position; using the chirp of shallow stratigraphic profile, will launch a probe into the water, and the use of navigation software for water position that the importation of the initial design Coordinate Measuring line; By design measuring line navigation, taking flight, using continuous measurement mode, real-time record measured coordinates track location map; use of shallow stratigraphic profile of underwater riprap areas Detection, stratigraphic section acoustic recordings; to track location map and stratigraphic section sound and graphics combined with a variety of conditions underwater riprap A typical shallow image control features, thereby detecting underwater riprap, without judgment Stone, a stone and the stone siltation coverage area. The invention of the underwater riprap levee provides an effective and reliable detection method to record high resolution, visual power.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for the quality of riprap construction under waterproofing of river embankments. Background technique [0002] Underwater riprap revetment is to use stones within a certain particle size range to throw the embankment in the scoured area from the deep water to the beach into a certain thickness of stone layer, so as to increase the anti-scour ability of the river bank to the water flow, and to stabilize the river regime and the bank. The purpose of the slope is mainly used in embankment sections where the bund is narrow, the water scours severely, the bank is deep, and the shoreline collapses seriously. The underwater riprap revetment reinforcement method has been widely used in the maintenance and reinforcement of river embankments in our country, and this situation will not change greatly in a long historical period in the future. [0003] How to control and evaluate the...

AI Technical Summary

Problems solved by technology

However, there is currently a lack of modern, effective and reliable detection methods for the construction effect of underwater riprap on embankments: since the bank section of underwater riprap revetment works is basically a section with strong changes in the river channel, the water flow has a relatively large impact on the river bed. The shape and terrain of the river bank during design change with time. During the construction of riprap, the shoreline is long, and positioning and measurement are difficult. After riprap, the traditional underwater section measurement process is complicated and the accuracy is low; Horizontal positioning and grid division are carried out, but the sound waves emitted by commonly used depth sounders cannot penetrate to the riprap site that sinks under the mud layer during dumping, and the section changes before and after dumping cannot be accurately given

Therefore, the topographic maps measured in different time periods are sometimes very different, and it is difficult to objectively evaluate the quality of the rock riprap after completion.

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