孔内深层强夯法在处理杂填土地基的应用

高晰陸欣邓中华（中铝贵阳铝镁设计研究院 550004）

李恩怀

刘靖张琦（中铝贵州分公司 550008）

[提要]:随着建筑用地的日趋紧张,越来越多的建筑物建在高填方、垃圾场及其它欠固结的软土层上,软土层的

地基加固处理问题已引起设计的高度重视。本文通过工程实例

,介绍了孔内深层强夯技术在加固杂填土高填

方土中的应用

：

该工法通过高动能和超压强在孔内深层强夯，使孔内填料在高压强状态下动

力固结，对桩间土产生强力的挤密作用，使桩间土的挤密程度高，从而到了较理想的地基

加固效果。实例

并提出

了孔内深层强夯法复合地基承载力的计算方法和检测手段，以及

设计注

意的相关问题

,可供设计人员参考。

[关键词]:深层强夯,地基加固,复合地基,承载力检测

Guiyang Aluminum-Magnesium Design & Research Institute Chinalco, Guizhou Branch/Gao Xi

,Lu Xin

,Deng Zhong Hua

Li Nn Huai

, Liu Jing

, Zhang Qi

(1 Guiyang Aluminium-Magnesium Design & Research Institut

e, Guizhou

550004 China

; 2 Guizhou Branch Chalieco, Guizhou 550008 China)

ABSTRACT: As time elapsing, the land for building construction becomes more and
more tight, more and more buildings have to be constructed on the high backfilling,

garbage disposal and other unconsolidated

soft

strata. Therefore, the consolidation

treatment for the soft foundation bed has drawn high

attention to the engineering

field. The paper introduced through engineering practice the application of SDDC
(Super Down Hole Dynamic Compaction) on

consolidating the mixed backfilling and

high backfilling

with rubbish . Via the forced SDDC with the high kinetic energy and

super pressure.the backfilling in the hole under the high-strength state shall

dynamically become consolidated while strongly compacting the earth between piles
and making the earth in high density,which desirably strengthens the foundations. The

paper also offers the method and means for calculating and testiong the bearing
capacity of SDDC foundation

and highlighted the relevant issues to be cared in the

engineering design as reference information for the designers.

Key words: SDDC(Super Down Hole Dynamic Compaction). Foundation be consolidation. Compound foundation
bed. Bearing capacity

test.

工程概况

工程概况：中国铝业贵州分公司四期电解铝工程，是中铝集团的重点项目

该工程位于贵州分公司三电解的北侧，占地面积约

26 万 m

。其主要生产车间为

4 栋铝电解厂房，厂房跨度 24m，柱距 6.3m，长度 530m，厂房高为 15m。