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福州某厂，是国家“七五”计划期间的重点建设项目。全套设备和设计由日本三菱联合集团承担。首期工程设计钻孔灌注桩1259根，桩径φ600mm，桩下部端面要求平底。嵌入基岩600mm，厂区施工场地大部分为乱石土预压充填，平均厚1.5m。深则达5m以上。施工条件差、难度大，工期紧迫。曾有两批兄弟公司进场施工，因苦于应付质量与工期要求，以及经济效益差而自动退场。我公司于19
A factory in Fuzhou is a key construction project during the National Seventh Five-Year Plan period. The full set of equipment and design is undertaken by Japan Mitsubishi Alliance Group. In the first phase of the project, 1,259 bored piles were designed, and the pile diameter was φ600 mm. The lower end of the pile requires a flat bottom. Embedded in the bedrock is 600mm. Most of the construction site in the plant area is pre-pressed and filled with crushed stone, with an average thickness of 1.5m. Deep is more than 5m. Poor construction conditions, difficulties, and tight deadlines. There were two batches of brother companies who had entered the construction site and were forced to leave the factory due to their difficulties in meeting quality and construction time requirements and poor economic returns. Our company is on 19