Protective dismantling construction method for basement pile foundation adjacent to existing subway line

• Main Authors: LIU ZIYANG, WANG JIE, DU YAO, JIN PING, WANG SHENGTAO, ZHAO GAOFENG, DENG NENGWEI, ZHAO RAN, CHEN TAO, LI RAN, WANG YANG, WU JIALIN, DU HONGBO, FANG ZHIHAI, DENG XIFEI, ZHANG GUANGHUI
• Format: Patent
• Language: Chinese; English
• Published: 30.08.2022
• Subjects: BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; CEILINGS; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FLOORS; FORMS; FOUNDATIONS; GENERAL BUILDING CONSTRUCTIONS; HANDLING BUILDING MATERIALS ON THE SITE; HYDRAULIC ENGINEERING; INSULATION OR OTHER PROTECTION OF BUILDINGS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; ROOFS; SCAFFOLDING; SHUTTERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES; WALLS, e.g. PARTITIONS

The invention provides a protective dismantling construction method for a pile foundation of a basement adjacent to an existing subway line. The protective dismantling construction method comprises the following steps that the surface of the basement is cleaned, and a construction hoisting hole is formed; constructing a retaining wall at the junction position of the underground structure to be dismantled and the non-dismantling side, and meanwhile, constructing a buttress wall on the side wall of the basement to be dismantled; filling an underground structure cavity with backfill soil, and refilling water to ensure balance of underground water levels inside and outside the basement; the basement top plate is dismantled through wire saw cutting; hardening the area above the basement; a bottom plate and a bearing platform of the basement are broken and removed through a full-rotation full-casing drilling machine; the pile foundation is pulled out; and plain concrete backfilling is carried out. The method is use