浅谈软土地基粉喷桩墙实用设计方法

TALKING ON THE PRACTICAL DESIGN METHOD OF DRY JET MIXING BULKHEAD ON SOFT FOUNDATION

当计入体积力时，与重力式挡墙等厚（Ｂ）的悬式挡墙，在开挖深度（Ｄ）处的墙体截面内力（σ）与埋深为零的重力式挡墙基底应力可用同一公式表达，特别在偏心距Ｂ时，说明具一定嵌入深度（Ｈ）的粉体喷搅桩（简称粉喷桩）墙兼有上述两种挡墙的受力特性。文中视桩墙为刚体，藉助于考虑地基弹性抗力的ｍ法和弹性理论公式，提出一种有关粉喷桩墙的实用设计与变位计算方法。

When the body force is put into account, for a cantilever retaining wall with athickness (B) equal to a gravity retaining wall,both the internal force(a) in the section of thewall body at the excavation depth (D) and the hasal stress of a gravity retaining wall with azero embedment may be expressed with the same formula,especially when the eccentric distance . The paper presents that the wall of a dry jet mixing pile (DJMP) with certainembedment (H) has both the mechnical properties of the above retaining walls. It is assumedthat the pile wall is a rigid body and the paper puts forward a practical design and calculationmethod for DJMP by means of a'm' method which considers the foundation'selastic resistance and an elastic theoretical formula.