共查询到19条相似文献,搜索用时 62 毫秒
1.
强夯地基效应及加固机制浅析 总被引:6,自引:0,他引:6
强夯地基效应,是指经强夯处理使地基土的结构形式,强度和变形大小,及其作用过程发生的改变。通过对强夯过程中一系列的现象分析,揭示强夯地基效应的形成机制,对强夯地基效应的三个方面及其之间的联系进行分析,其结论对于强夯处理设计和加固机制的认识有较大意义。 相似文献
2.
福州长乐机场浅层地基强夯施工 总被引:2,自引:0,他引:2
这是一篇关于福州长乐机场用强夯加固浅层地基土的工程实录。文中详尽地介绍了强夯施工的设计工作,包括夯点布置及夯击流水,机具选用,夯锤及夯击能量的确定,以及在强夯时的地基土中孔隙压力和土体变形等的监测等。 相似文献
3.
4.
5.
地基液化是高地震烈度区影响地基稳定性的重要因素之一,是引起构筑物破坏的主要形式。通过工程实例说明采用强夯法处理可液化地基,可有效消除液化,提高地基承载力。 相似文献
6.
7.
强夯法处理地基后承载力的计算 总被引:5,自引:0,他引:5
本文结合工程实践介绍了强夯法处理地基后承载力计算的力学模型和计算方法,并附有已搞过的十个工程实例,将计算值与强夯后检测值进行了分析比较,说明本文公式的正确性。 相似文献
8.
粘性土为主的地基强夯的时效性 总被引:1,自引:0,他引:1
根据浦东国际机场飞行区跑道地基强夯工程(三标)实测的不同时间的静力触探资料,讨论以粘性土为主的地基强夯强度增长的时效现象,得出:粘性土为主的地基,强夯的加艇具有滞后特性。 相似文献
9.
10.
强夯处理湿陷性黄土地基效果浅析 总被引:3,自引:0,他引:3
强夯是处理湿陷性黄土地基的一种有效方法,灵宝市委市政府办公大楼湿陷性黄土地基,经强夯处理后,地基土孔隙和压缩系数降低,干密度提高,湿陷性被消除,地基承载力大幅度提高并满足了建筑设计基础底面压力220kPa/m^2的要求。 相似文献
11.
采用强夯法和强夯置换法对某工程深厚人工填土层进行地基处理。分析了场地的地质条件及建设要求,介绍了强夯法和强夯置换法的应用及效果。 相似文献
12.
高填土地基强夯夯击能的使用研究 总被引:3,自引:1,他引:3
结合广东某电厂高填土地基强夯的实践,对夯击能的使用问题提出几点看法,并根据现场孔隙水压力和变形监测及夯后检测等资料。说明如何正确选用夯击能以达到更好的加固效果。 相似文献
13.
就强夯置换法在湿陷性黄土地基中的应用进行探讨.根据构筑物荷载高、地基承载力低且地基具湿陷性等特点,经多种方案对比,选用强夯置换法进行地基处理.通过检测取得较好的技术效果,可大幅度提高承载力并消除湿陷性,具有较好的工程应用前景. 相似文献
14.
对岩土勘察中饱和砂土和粉土的液化机理进行了阐述,主要对强夯法消除液化的影响因素进行了对比分析,对于在类似发生液化场地的岩土勘察中起到一定工程实践意义. 相似文献
15.
16.
de Souza Tennison Freire Pasqual Rodrigo Paulo Strano 《Geotechnical and Geological Engineering》2021,39(5):3981-3993
Geotechnical and Geological Engineering - This article presents a method to estimate dynamic compaction crater depth using empirical equations. As main reference, three physical model studies that... 相似文献
17.
Application of Dynamic Compaction in Highway: A Case Study 总被引:1,自引:0,他引:1
The application case of dynamic compaction (DC) is realized in highway. In this paper, the in situ tests for evaluating effectiveness of DC are performed on a liquefiable soil and soft soil interbedding foundation encountered
in highway engineering practice. Excess pore pressure, total surface settlement and lateral deformation under DC impact are
measured and analysed. The cone penetration test (CPT) and spectral analysis of surface wave (SASW) are used for investigating
the compaction effectiveness. The formulation of the predicting improvement depth of the DC is presented according to the
pseudo-static mechanics method and is of obvious meaning of soil mechanics compared with Mendard’s formulation. The calculating
results of the formulation of improvement depth of the DC are agreement with the measuring results. The investigation results
indicate that the DC technique is an effective way for improving liquefiable soil and soft soil interbedding foundation in
highway engineering practice. 相似文献
18.
Mohammed Y. Fattah Hawraa H. M. al-Musawi Firas A. Salman 《Geotechnical and Geological Engineering》2012,30(6):1369-1387
Gypseous soils are distributed in vast areas and various regions of Iraq and other countries. Many foundation failure problems that occur in these soils are associated with percolation of water and dissolution of gypsum. Many attempts were made by several researchers to treat and improve the properties of gypseous soils to decrease the dissolution of gypsum and collapse potential of these soils. The purpose of the present work is to investigate the effect of dynamic compaction process on the behaviour of gypseous soils. Extensive laboratory tests are carried out to study the geotechnical properties and the behaviour of three gypseous soils of different gypsum contents; 60.5, 41.1 and 27?%. The tests included compaction characteristics, compressibility, and collapsibility tests for samples tested before and after treatment by dynamic compaction process under different number of blows, falling weights and heights of falling of the weights. Three weights are used to compact the samples, namely; 2, 3 and 5?kg. The number of blows is varied between 20 and 40, while three heights of drop are tried (35, 50 and 65) cm. The results showed that the best improvement in compressibility is achieved when the sample is compacted by 20 blows; above this number a negligible decrease in the compression index CC is obtained. As the gypsum content increases, the dynamic compaction has greater effect on improvement of compressibility of the soil, while as the height of drop increases, the compression index CC decreases. 相似文献