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灰土挤密桩处理湿陷性黄土地基载荷沉降试验研究

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为了探讨灰土挤密桩处理湿陷性黄土地基载荷沉降情况,以民小公路处理后的地基为例,选择试验桩并在附近埋设沉降管,在非浸水与浸水条件下分别施加载荷,观察地基沉降变化.结果表明:随着荷载的增加,地基沉降量呈现出不断增长的趋势.从地基荷载沉降试验可以看出,当荷载500kPa时,非浸水地基的平均沉降为57.3mm,浸水地基的平均沉降为71.2mm,二者差距不大,都低于要求的200mm.由此可见,应用灰土挤密桩方法对湿陷性黄土地基进行处理后,黄土湿陷性得到了有效改善,地基载荷沉降满足施工要求.
Experimental Study on Load-sedimentation of Collapsible Loess Foundation Treated by Lime-soil Compaction Pile
In order to discuss the load-sedimentation of collapsible loess foundation treated by lime-soil compaction pile,taking the treated foundation of Minxiao Highway as an example.Selecting test piles and burying settlement tubes nearby,and applying loads under the conditions of non-immersion and immersion respectively to observe the change of foundation sedimentation.The results show that with the increase of load,the settlement of foundation presents a growing trend.From the foundation load-sedimentation test,it can be seen that when the load is 500kPa,and the average settlement of non-submerged foundation is 57.3mm,and that of submerged foundation is 71.2mm,with little difference,both are lower than the required 200 mm.It can be seen that after the collapsible loess foundation is treated by lime-soil compaction pile method,the loess collapsibility is effectively improved and the foundation load settlement satisfies the construction requirements.

collapsible loes foundationlime-soil compaction pileload testsettlement deformation

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中国有色金属工业西安勘察设计研究院有限公司,陕西西安 710054

湿陷性黄土地基 灰土挤密桩 载荷试验 沉降变形

2024

中国煤炭地质
中国煤炭地质总局

中国煤炭地质

CSTPCD
影响因子:0.652
ISSN:1674-1803
年,卷(期):2024.36(1)
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