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本着安全、经济的原则,某工程狭窄场地超深基坑支护在国内首次采用挖孔支护桩加预应力锚索、土钉墙加喷锚支护、钢内支撑支护的复合型支护体系。结合工程特点,详细介绍了各种支护方式的施工工艺及施工要点。工程实践表明,通过该复合型支护技术的应用,确保了工程质量和工期,并有效降低了工程造价,取得了较好的支护效果。
In line with the principle of safety and economy, the ultra-deep excavation support in a narrow site of a project is adopted for the first time in China for the first time by using the method of digging holes and supporting piles plus prestressed anchor cables, soil nailing walls plus spray-anchor support and composite support Support system. Combined with the engineering characteristics, it introduces in detail the construction technology and construction essentials of various support methods. Engineering practice shows that through the application of the composite support technology to ensure the project quality and duration, and effectively reduce the project cost, and achieved good support effect.