Composite wave-resisting seepage-proof wall for coast flexible direct-current convertor station and transformer substation and construction method

Abstract

The invention discloses a composite wave-resisting seepage-proof wall for a coast flexible direct-current convertor station and a transformer substation and a construction method. According to the composite wave-resisting seepage-proof wall, a wave wall body and a bounding wall body are constructed in a combined mode to form a gravity type wave wall doubled as a bounding wall, and a composite seepage-proof body from the natural ground to bed rock is arranged at the bottom or on the outer side of the gravity wave wall and is composed of a completely-sealed scour-protection seepage-proof underground continuous wall with the width about 3 m. The construction method of the composite seepage-proof body comprises the steps that (1) dynamic compaction or dynamic compaction replacement compact processing is carried out on easily-scoured backfill and sludge; (2), on the basis of dynamic compaction, scour-protection seepage-proof continuous blowdown filling piles are sealed; (3) additional water stop measures of pre-filling of dense slurry and high-pressure grouting are adopted in the inner side of the convertor station or the inner side of the transformer substation. The composite wave-resisting seepage-proof wall has the advantages of being simple in structure, convenient and reliable in construction, firm, good in safety, relatively economical, small in occupied area and the like.

Description

technical field [0001] The invention relates to a composite anti-seepage wall and a construction method for coastal flexible DC converter stations or substations, which are suitable for the construction of flexible DC converter stations or substations built near the sea; it belongs to the design and construction technology of power transmission and transformation projects field. Background technique [0002] According to the requirements of the code, the site design elevation of the station area should be higher than the flood level with a frequency of 1% or the highest waterlogging level in history. For substations affected by wind and waves along rivers, rivers, lakes, and seas, the elevation of flood control facilities should also consider the wind and wave with a frequency of 2%. High and 0.5m safe superelevation. For power plants located on the seashore, the elevation of the flood control or embankment crest shall be increased according to the requirements of the flood...

AI Technical Summary

Problems solved by technology

[0003] The conventional embankment construction scheme occupies a large area and the foundation treatment is complicated, and the investment will exceed the investment of the flexible DC converter station or substation body with a smaller area, which is extremely uneconomical in terms of construction cost

Moreover, the construction period is very long, the settlement after construction is relatively large, and the risk of flood control is also significantly increased

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