Construction method for treating widened and heightened engineering joint surfaces of dikes on soft clay foundation

Abstract

The invention relates to a construction method for treating widened and heightened engineering joint surfaces of dikes on a soft clay foundation. A waterproof laminated film with a grouting pipe is embedded when a horizontal drill stem is utilized to drill a horizontal hair crack along the direction of an old dike, and the joint surfaces of new and old dikes are grouted by the grouting pipe embedded in the waterproof laminated film, so that longitudinal cracks of the dikes, which are caused by differential settlement of the joint surfaces of the new and old dikes, are effectively controlled and the problem of seepage prevention of the joint surface of the new and old dikes is solved. The technical method disclosed by the invention solves the technical difficult problem of laying transverse reinforced materials in the old dike; and the grouting is carried out by the waterproof laminated film with the grouting pipe, so that the joint surfaces of the new and old dikes are compacted and the seepage of water on the joint surfaces of the new and old dikes is effectively prevented. Therefore, the problems of the longitudinal cracks of the dikes and seepage, which are caused by improper treatment on the widened and heightened engineering joint surfaces of the dikes on the soft clay foundation, are effectively controlled. The method has the advantages of simple construction process and strong operability, is convenient for quality control and has obvious economic benefits and obvious treatment effects.

Description

technical field [0001] The invention relates to the technical field of embankment reinforcement engineering, in particular to a construction method for treating joint surfaces of embankment widening and heightening engineering on weak soil foundations. It is mainly applicable to technical fields such as differential settlement control of embankment widening and heightening projects in weak soil foundations and anti-seepage of joint surfaces of old and new embankments. Background technique [0002] With global warming, the global ecology is deteriorating, and severe weather such as torrential rains and typhoons has increased sharply, posing severe challenges to the safety of embankments and other projects. In 1998, the torrential rain and flood in the Yangtze River Basin caused the embankment of Jiujiang City to burst. In 2005, the typhoon in New Orleans, USA caused embankment damage, which caused serious consequences such as massive casualties and direct economic losses. my...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies and defects, solve the cross-sectional differential settlement of dike widening and heightening projects on weak soil foundations and the anti-seepage problems of the joint surface of new and old dikes, and propose a new treatment method using composite geotextile combined grouting method. The construction method of the joint surface of the old embankment is to use special construction machinery to tunnel longitudinally along the embankment in the old embankment and lay the composite geotextile, so that the composite geotextile and the old embankment can be effectively occluded. The grouting pipe inside the cloth grouts the joint surface of the old and new embankments to achieve the double effect of compacting the joint surface of the new and old embankments and preventing seepage

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