Geotextile need to take a variety of methods Qiang Hu: riverside embankment vulnerable spot vulnerable spot and sometimes difficult to distinguish between filament geotextile, flood embankments may be a variety of risks clear, geotextiles Qiang Hu need to take a variety of methods, such temporary. risk appears clear, generally do not call it a vulnerable spot. According to their relative position causes rivers vulnerable spot is usually divided into the following categories. 2.1 Shoreline corners vulnerable spot in the corners with full case will shore and concave, convex bank silting, continue to form a series of curved natural embankment, some natural embankment between these curved depressions exist collectively bristles Kong terrain will follow naturally curved concave bank embankment downstream turbidity back production filament geotextile, to a death trip back into the lateral erosion and pitting later spoke at the upstream end of polyethylene, polypropylene or both ends of the downstream end of the spokes spoke together. For example, Liaoning Haicheng fan face danger, situated on the left bank big son, Wen Hong Village southeast of extinction before the levee 'heart bias on the right bank of river bend flow, forming wave and current, so severe shore erosion. Puncturing meter-long river main channel shore from large 堤脚 only 27m, down the shore has formed deep groove. Another example is located in the sea trench railway bridge Sancha AM tour around the left bank of the big son Daliaohe vulnerable spot. Flow heart biased left bank of the river curvature of 1.9, making the rate of radius bsom, COLLAPSE length of more than 15M meters. 2.2 straight section vulnerable spot filament geotextile impermeable protective custom filament geotextile, from flat shape, the river relatively straight, distributed on both sides of the river channel has jagged edges and deep grooves beach, there is often a short deep grooves between the upper and lower The transition section, often called the shallows. Reach judge straight key indicators is tortuous factor. According to long-term employment at the North River and three spare straight reach of information, its coefficient of less than 1 .1so tortuous river with coefficient 1.39, 7.8, varies widely, but the same river Riij small changes. How to repair damaged filament geotextile! Bottom filament geotextile fabric should extend practical filament geotextile to high, do not pull too tight, should leave more than 1.50% increase to prepare for local subsidence stretch. Filament geotextile slope from top to bottom of the laying sequence taken. Two adjacent longitudinal joints should not be a horizontal line, should be staggered over 1M. Longitudinal joints should distance dam foot, bending the foot 1.50M above, should be located in the plane. Field after the end of the first slope. When laying the slope, show film direction substantially parallel to the maximum slope should line. Geomembrane laying in front of the slope, the first area to be checked for laying, measuring, according to the measure of size will match the size of the warehouse shipped to an impermeable membrane anchoring groove of the platform, according to the actual conditions laid taken from top-down "push shop" convenient way. Filament geotextile in the sector should be a reasonable cut, the upper and lower end have been firmly anchored. On the uphill section, the next downhill section, and there is enough overlap length ≥15 cm slope impermeable HDPE geomembrane HDPE geomembrane GCL must be laid in the area after the acceptance of the film under the reservoir bottom laying artificial press a certain direction, the "push shop" when laying HDPE geomembrane slope with sand bags in a timely manner will be positive, the film exhibition ride Sarkozy direction substantially parallel to the maximum slope should line. Need to repair worn by laying and filament geotextile thermal connection geotextile small pieces, small pieces of filament geotextile edge defects than the minimum length in all directions 200mm. Thermal connection must be strictly controlled to ensure close integration filament geotextile mesh and filament geotextile, geotextiles and no damage. A day before the end of the laying of the day, all laying geotextile surface visually to determine where all the damage already be marked and repaired immediately, laying the surface is not possible to determine the damage caused by foreign substances, such as needle, small nails, etc. . Damage repair should meet the following technical requirements: to fill holes or fill cracks and patches should filament geotextile material is consistent. Patches should extend into the damaged filament geotextile outside the scope of at least 30 cm. 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