FIELD TESTS ON PILE2SOIL STRESS RATIO OF CEMENT2SOIL MIXED PILE COMPOSITE GROUND UNDER EMBANKMENT
-
摘要: 通过对填砂路堤下水泥搅拌桩复合地基桩土应力比的现场试验,获得路堤荷载下水泥搅拌桩复合地基桩、土应力,并对复合地基中桩土应力比随荷载和时间的变化规律进行探讨。试验结果表明,路堤荷载下水泥搅拌桩复合地基桩土应力比的变化规律与刚性基础下复合地基桩土应力比的规律有较大差别,它随荷载的增加呈先减小后增大的规律,桩土应力比不超过2.0,且随时间基本不变。Abstract: Field tests on pile2soil stress ratio of composite ground with cement2soil mixed pile under embankment filled with sand are carried out, the stresses on pile and surrounding soil are measured. Variations of pile2soil stress ratio of the composite ground with cement2soil mixed pile under embankment with flexible load and time are investigated. The measured results show that the variation of pile2soil stress ratio under embankment is quite different from that under rigid foundation, the measured pile2soil stress ratio is much more less than that under rigid foundation,it varies with embankment load from decrease to increase,its values are less than 2. 0,and changes hardly with time.
-
Key words:
- cement-soil mixed pile /
- composite ground /
- embankment /
- rigid foundation /
- pile-soil stress ratio
-
[2] 段继伟,龚晓南,曾国熙. 水泥搅拌桩的荷载传递规律. 岩土工程学报,1994,16 (4) :1-7 张 雁,黄 强. 半刚性桩复合地基性状分析. 岩土工程学报,1993,15 (2) :86-93 [3] 刘三仓,韩思珍. 灰土桩挤密地基的桩土应力比及承载力探讨.岩土工程学报,1998,18 (1) :89-94 [4] 张建新,史三元. 粉喷桩复合地基应力及荷载传递分析. 工业建筑,1998,28 (6) :38-40 [5] 雪飞胜,肖建勇. 粉喷桩复合地基承载特性试验研究. 长沙铁道学院学报,2000,21 (3) :66-69 [6] 池跃君,宋二祥,金 淮. 素混凝土桩复合地基荷载传递机理的试验研究. 工业建筑,2001,31 (4) :39-442 [7] 杨素春. CFG桩桩土应力比及褥垫层厚度研究. 工业建筑,2004,34 (6) :44-47 [8] 池跃君,宋二祥,陈肇元. 刚性桩复合地基在不同荷载下的桩土分担特性. 天津大学学报,2003,36 (3) :359-363 [9] 宋修广,王松银,高 泓. 水泥粉喷桩复合地基桩土应力比的研究. 华东公路,2000 (3) :40-41 [10] 王 祥. 粉喷桩在深厚软基处理中的试验研究. 岩土工程学报,2001,23 (4) :513-515 [11] 马时冬. 水泥搅拌桩复合地基桩土应力比的测试研究. 土木工程学报,2002,35 (2) :48-51 [12] 俞亚南,张仪萍,张土桥. 桥头软基粉喷桩处理现场试验研究. 土木工程学报,2002,35 (4) :65-69 [13] 晏启祥,周全能,刘浩吾,等. 粉喷桩加固软土路基筑堤原位试验研究. 岩石力学与工程学报,2002,21 (9) :1 415-1 419 [14] 李海芳,温晓贵,龚晓南. 低强度桩复合地基处理桥头跳车现场试验研究. 中南公路工程,2003,28 (3) :27-29 [15] 吴慧明,龚晓南. 刚性基础与柔性基础下复合地基模型试验对比研究. 土木工程学报,2002,34 (5) :81-83 [16] 李志斌,叶观宝,徐 超. 水泥搅拌桩复合地基桩土应力比的对比分析. 地下空间与工程学报,2005,1 (3) :386-418 [17] Domenico Bruzzi,Andrea Zattoni,Giorgio Pezzetti. Pressure Cell :How to Obtain Better ResultsPPLeung Tan, Phoon ed. Field Measurements in Geomechanics. Rotterdam: 1999 :61-65
点击查看大图
计量
- 文章访问数: 66
- HTML全文浏览量: 7
- PDF下载量: 41
- 被引次数: 0