A construction method of soft drainage and sinking

Abstract

The invention discloses a construction method for soft drainage and sinking, which is characterized in that a permeable opening is provided on the arrangement, so that the water flow under the arrangement flows upward through the permeable opening during the sinking and drainage, thereby increasing the settlement speed of the arrangement and slowing down the vibration drift. After sinking and floating, the curtain body covers the opening under the action of water flow to ensure the protective effect of the geotextile. This technology can improve the efficiency of sinking and arranging the bed, reduce the phenomenon of drifting and tearing in the process of sinking and arranging, and ensure the accuracy. The invention has the advantages of being able to facilitate the operation of the soft row, sinking row, improving the efficiency and accuracy of the sinking row implantation, improving the protection effect of the soft row on the river bed and prolonging the service life.

Description

technical field [0001] The invention relates to a river bank protection technology, in particular to a construction method for soft drainage and sedimentation. Background technique [0002] The existing soft row is a river bed and river bank protection technology extended from the geotextile soft foundation treatment technology. Since the 1990s, it has been used in the middle and lower reaches of the Yangtze River and estuary waterway regulation and river bank and coast protection projects. For more than 20 years, many designers and construction personnel have done a lot of research on the structural type and sinking method of the soft row, but there is no major improvement. The common structure of the existing soft row generally includes laying on both sides of the river bed below. The arrangement of the side and the concrete blocks arranged at even intervals above the arrangement, for example, a soft row of interlocking blocks disclosed in my country 201410121675.1, adopts ...

AI Technical Summary

Problems solved by technology

[0004] When this existing soft body sinks and drains, the geotextile is subjected to too much water pressure during the sinking process, and it is not easy to sink, and all the weight of the ballasted concrete block above acts on the geotextile, which increases the weight of the geotextile during the sinking process. Various forces when the soft row floats and oscillates cause the soft row to easily roll over and tear

[0005] Specifically, through the technical investigation during on-site construction, as well as the research on the underwater force and failure mechanism of the soft row, it was found that during the laying process, when the water flow rate is high, the row body suffers from great resistance and the row body is easy to discharge. Sliding, the upper edge of its underwater part is easy to roll over under the momentum of the water flow and the tilt of the turbulent water mass, causing adverse consequences

The first consequence is that the soft platoon leaves the originally designed implantation position, which fails to meet the design requirements, and causes waste of the platoon body, reducing the protective effect of the soft platoon

The second is that after the front part of the row body is rolled up, the area facing the water at the upstream end is increased, and the blocking and circumventing effect on the water flow is increased, which makes the water flow near the row body more disturbed and tumbling, and increases the local flow velocity, resulting in Under the action of water flow, the row body vibrates and floats up and down, which may tear the arrangement, which reduces the overall protection effect and service life of the soft row

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