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Underwater slope backing method of bulky sand filled geotechnical pillow bags

A process method and large-scale technology, applied in the direction of coastline protection, etc., can solve problems affecting the stability and safety of embankments, and achieve the effects of reducing land acquisition, saving engineering investment, and high costs

Inactive Publication Date: 2011-08-24
ANHUI SURVEY & DESIGN INST OF WATER CONSERVANCY & HYDROPOWER
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Problems solved by technology

[0004] In order to overcome the problem of the existing technology that affects the stability and safety of the embankment existing in the steep underwater bank slope before laying, the present invention provides a large-volume sand-filled geotechnical pillow bag underwater slope cushioning process

Method used

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  • Underwater slope backing method of bulky sand filled geotechnical pillow bags

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[0028] 1. Project overview

[0029] see figure 1 The Xinjiawan collapse bank of the Huaibei embankment is located in Wuhe County, Anhui Province. The Huaihe River flows through this section in the shape of a hump. The Xinjiawan collapse bank is located on the first concave bank facing the current, and the river bottom elevation is -13.4m , is the deepest section of the main stream of the Qianli Huaihe River, the underwater bank slope is between 1:1.15 and 1:4.1, and the slope is relatively gentle below the -8.0m elevation. The soil layer structure of the bank slope is: ① layer of sandy loam; ② layer of silty heavy silty loam, flow-plastic to soft plastic; ③ heavy-medium silty loam, plastic; ④ fine-medium sand, medium-dense to dense. The soil characteristics of the bank slope are: ① layer and ② layer have low strength and poor erosion resistance, and ② layer soil has weak water permeability, and it is easy to cause slope instability when the water level drops suddenly; ③ layer...

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Abstract

The invention relates to an underwater slope backing method of bulky sand filled geotechnical pillow bags. The method comprises the following operation steps of: 1, measurement of an underwater bank slope; 2, soil characteristic investigation of the underwater bank slope; 3, technical parameter determination and preparation of the geotechnical pillow bags; and 4, sand filling and sinking of the bulky sand filled geotechnical pillow bags. By the method, slope cutting is avoided, the bank shoal of certain width is reserved, and stability and safety of a river dike can be effectively improved; land acquisition is reduced, and the project investment can be greatly reduced; and the bulky sand filled geotechnical pillow bags have good extension and deformation capacities in the longitudinal and transverse directions, are combined tightly with the underwater irregular bank slope after being laid in place, have large volume, heavy dead weight, good stability and good slope backing treatment effect, and create conditions for wide application of a new composite geotextile software row bank protection technology in river bank collapse treatment projects.

Description

technical field [0001] The invention belongs to the technical field of revetment engineering in river bank collapse treatment engineering, and relates to a large-volume sand-filled geotechnical pillow bag underwater pad slope technology method for revetment with composite geotextile soft row. Background technique [0002] In river bank collapse treatment projects, the application of composite geotextile soft row revetment technology has become more and more frequent in recent years. According to the test experience of soft row revetment projects in the Yangtze River and Pearl River Basins, the underwater deployment slope of soft row should be slower than 1:2.5~ 1:3.0, the bank slope along the direction of the water flow should also be roughly smooth. The conventional practice is to cut the steep underwater bank slope before laying. However, for most river bank collapses, due to the continuous development of bank collapses before the treatment, the underwater bank slopes are ...

Claims

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Application Information

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IPC IPC(8): E02B3/12
Inventor 胡祖华江永强王力理余智囊王诗祥陈光临柯晓茯李涛喻双林王永雷陈学礼朱佳莉
Owner ANHUI SURVEY & DESIGN INST OF WATER CONSERVANCY & HYDROPOWER
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