Pre-hole-forming padding substitution hammer flattener dynamic compaction method

• Main Authors: ZHANG ZHONGDAO, ZHAO YONGXIANG, DONG BINGYIN, LIU BO, ZHAO FENG, YIN ZHAO, GAO BINFENG, ZHANG XINRUI, CHAI JUNHU, MOU JIANYE
• Format: Patent
• Language: English
• Published: 24.06.2015
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention provides a pre-hole-forming padding substitution hammer flattener dynamic compaction method, by means of the method, partial substitution to a soft soil foundation is achieved, and a substitute mound body is in good contact with an underlying hard layer. The method comprises the following steps: 1, pre-forming a hole in foundation soil; 2, filling the hole with materials till the ground surface is reached; 3, conducting hammer flattener local compaction construction to filler at the ground surface, wherein a drum-shaped compact mound body with upper end large is formed; 4, after conducting backfill and flattening the field, adopting full compaction for further consolidating inter-mound soil bodies and superficial soil bodies; 5, laying a cushion layer. The method has the advantages that the partial substitution treatment can be conducted to the deep foundation of a type such as saturated clayey soil, sludge, mucky soil or a weak intercalated layer, according to the depth, dynamic compaction which is different in energy level is applied to a substitute body, the compact mound body is formed, the cushion layer is laid, the composite foundation is formed, and meanwhile the method has the advantages of being convenient in construction, low in construction cost, short in construction duration, environment protective, high in foundation bearing capacity and small in sedimentation deformation.