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闫锡海 《赤峰学院学报(自然科学版)》2007,23(4):119-119,126
在软弱的地基上填筑路基,采用碎石桩对承载力难以达到标准要求的软弱地基进行加固处理,是软土路基处理的一种方式.对于重交通量公路,特别是高速公路或一级公路,该方法得到了广泛的应用.实践证明,碎石桩通过不同的桩径和桩长处理软弱地基,对提高地基承载力,减少地基的沉降,节约施工成本,降低工程造价在公路建设上具有重要的意义. 相似文献
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通过对水泥搅拌桩固结机理的分析,研究水泥搅拌桩提高软土复合地基承载力的技术措施。结合武夷山市变电站工程实例,水泥搅拌桩设计直径550 mm,桩身设计强度等级1.5 kpa,采用搅拌喷浆施工方法形成水泥桩,使用慢速维持荷载法对加固效果进行复合地基荷载试验,最大试验荷载加至180 KN,绘制了P-S曲线。结果显示复合地基承载力特征值均为90 kpa,表明水泥搅拌桩能够满足软土地基加固要求。 相似文献
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《滁州学院学报》2020,(2):31-35
为了更深入地了解碎石挤密桩复合地基的承载能力及承载力特征值,以安徽皖北地区某高速公路路基段采用碎石挤密桩处理的人工填土地基的试验段工程为例,通过现场单桩荷载试验确定复合地基的承载力特征值,运用碎石桩桩体重型动力触探试验的方法,反向检测碎石桩的施工质量,从而验证挤密桩复合地基处理效果,并分析了荷载和重型动力触探试验的研究结果。研究结果表明:各试验点的荷载压力与沉降量关系趋势规律相同;随着荷载达到200kPa之后,沉降开始加快,关系曲线仍光滑连续,无激变拐点。各试验点在15m以内的动力触探锤击数均达到30击,表明碎石挤密桩复合地基的整体承载力提高显著。通过现场试验研究了碎石挤密桩复合地基的承载能力特性,其研究结论为今后类似工程提供一定的理论与实践参考。 相似文献
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郭亚宇 《石家庄铁路职业技术学院学报》2010,9(2)
通过对新株洲站CFG桩的试验研究和静载检测及数据分析,介绍CFG桩复合地基承载力的静载试验检测方法;证明静载试验能够检测CFG桩复合地基的承载力.试验结果为完善CFG桩复合地基加固软土地基检测标准提供依据,为在高速铁路软土地基加固工程中推广应用提供指导. 相似文献
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简锡明 《福建工程学院学报》2012,(3):235-240
采用碎石桩与强夯法联合处理方法对某山区深厚填土场地进行了地基处理的试验及动力触探和对试验区各施工阶段的浅层载荷板试验,结果表明:碎石桩联合强夯地基处理能较大幅度地提高地基承载力并有效减少地基变形,对山区挖填土场地具有较好的适应性和较明显的经济效益,同时具有施工速度快、成本低等特点,尤其是在改善挖填方场地的力学性能方面效果显著。 相似文献
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主要对高速公路软土路基的特点及处理方法进行了分析.首先概述了高速公路软土路基的特点,然后分析了高速公路软土路基常见处理方法,最后探讨了振冲碎石桩复合地基处理方法的特点和施工工艺. 相似文献
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目前,深层搅拌桩由于施工技术和施工机械的成熟已经被广泛地用于软土地基加固、边坡支护、基坑及堤坝防渗等方面.它不仅可以增加软土地基的承载力,减少沉降量,还可以提高边坡的稳定性,具有快速、经济、有效等特点.其施工方法分为喷粉和喷浆两种方法.本文侧重水泥喷粉法及采用喷粉法易出现沉桩工程问题进行了分析并提出处理方法,以期与同行探讨. 相似文献
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盘锦市体育中心地质情况表现为在地下14m范围内存在粉砂夹粉质粘土土层,在地震荷载作用下,将会产生砂土液化现象。针对这一情况,采用了碎石桩复合地基进行处理,处理后地基液化现象基本消除,地基承载力也满足要求。工程完工后,运行情况良好。 相似文献
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As an academic, I grapple with the role of private foundations in higher education; on the one hand, as a critical scholar-activist committed to radical social and economic change, and on the other hand, as a participant in foundation-funded academic projects. I recognize the contradictory position I occupy within an institution that has historically served the status quo. In this paper I attempt to deal with the question of whether foundation funds, historically made possible by our unjust social system, have the capacity to contribute to the systemic social and economic changes I – alongside like-minded colleagues – strive to realize. Specifically, I look at the role of foundations in American higher education for the purpose of agitating hegemonic ideas and challenging us to ask difficult questions about our day-to-day practices. 相似文献
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路堤荷载下混凝土芯水泥土搅拌桩工作特性研究 总被引：1，自引：0，他引：1
研究目的：研究混凝土芯水泥土搅拌桩在路堤荷载下的荷载传递规律和变形控制机理。创新要点：评价路堤荷载下混凝土芯水泥土搅拌桩的地基处理效果,测量混凝土芯的竖向应力变化规律和复合地基桩士荷载分担特点,并分析填土过程中混凝土芯水泥土搅拌桩复合地基的固结规律。研究方法：通过埋设沉降板、分层沉降管、测斜管、土压力盒、孔隙水压力计以及钢筋应力计,在路堤填筑过程中对混凝土芯水泥土搅拌桩复合地基进行了长期现场试验。重要结论：1．混凝土芯水泥土搅拌桩复合地基的总沉降、工后沉降以及深层水平位移控制效果均较好,优于普通水泥土搅拌桩复合地基：2．混凝土芯水泥土搅拌桩复合地基的桩土应力比以及荷载分担比均大于普通水泥土搅拌桩复合地基,能有效减小土体表面的荷载量,对于控制沉降有一定的效果。3．在路堤这种柔性荷载作用下,混凝土芯水泥土搅拌桩上部会出现一定的负摩擦阻力,存在一个“中性点”。4．混凝土芯水泥土搅拌桩复合地基的固结速率较快,能有效控制由于丰崮结引起的长期沉降。 相似文献
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介绍了复合地基技术的发展概况，着重论述了一些相关的概念，如复合地基、地基处理、复合桩基、按沉降控制设计的疏桩桩基等。通过受力机理的分析，阐明了设置褥垫层与否及桩与基础连接与否并不是复合地基的必要条件，并提出了今后复合地基的重点研究方向。 相似文献
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Moral foundation theory posits that specific moral transgressions elicit specific moral emotions. To test this claim, participants (N = 195) were asked to rate their emotions in response to moral violation vignettes. We found that compassion and disgust were associated with care and purity respectively as predicted by moral foundation theory. However, anger, rage, contempt, resentment and fear were not associated to any single moral transgression. Thus, even though the type of moral violation matters for the type of emotion that is elicited, the link between moral foundations and moral emotions seems more complex than moral foundation theory suggests. Rather, the findings suggest that there are both emotion-specific foundations (i.e. care and purity) and emotion-unspecific foundations (i.e. fairness, authority and loyalty). 相似文献
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张策华 《南京晓庄学院学报》2007,23(4):53-56
法律文化同构性的产生具有广泛而又深刻的社会基础,这种社会基础集中体现在以全球市场经济的蓬勃发展为代表的物质基础,以人类共同的文化价值诉求为代表的思想文化基础,以法律文明运动的统一性趋向为代表的法律事实基础,正是如此丰厚的社会基础才孕育出法律文化的同构性。 相似文献
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Andrew Bourelle Tiffany Bourelle Natasha Jones 《Technical Communication Quarterly》2015,24(4):306-327
The authors provide a robust framework for using rhetorical foundations to teach multimodality in technical communication, describing a pedagogical approach wherein students consider the rhetorical canons—invention, arrangement, style, delivery, and memory—when developing texts beyond print. Students learn to assess their own work, reflecting on how each canon contributed to the rhetorical effectiveness of their multimodal projects. The authors argue for using the canons as a rhetorical foundation for helping students understand technical communication in the digital age. 相似文献
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潘宜兴 《宜宾师范高等专科学校学报》2014,(5):29-33
我国非公募基金会得到国家政策的扶持,企业、社会和个人社会责任感增强,给非公募基金会的发展带来了机遇,发展呈“井喷”之势。非公募基金会募捐渠道狭小,对地区经济依赖性强,使东西部地区的非公募基金会发展不平衡;且非公募基金会较公募基金会专业化程度低,信息不透明,无法满足人们日益增长的公益需求。非公募基金会改革应主要从两方面进行：完善内容治理和信息公开制度,从而提高基金的社会公信力;提高专业化运作,改变保守求稳的理财观念,实现基金的增值。 相似文献
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Design of offshore wind power foundation with multi-bucket 总被引：1，自引：0，他引：1
Three- and four-bucket offshore wind power foundations with a new form of force-transferring structure are proposed in this paper, and the integrated finite element model of foundation-soil-transition structure is established by using ABAQUS. The carrying capacity of the proposed foundations is studied under vertical load, horizontal load and bending moment. It can be seen that the vertical bearing capacity of multi-bucket foundation can be roughly estimated by the vertical bearing capacity of single-bucket; the horizontal bearing capacity of the three-bucket foundation scheme is controlled by displacement, while that of the four-bucket foundation scheme is controlled by the internal forces of soils. Moreover, the carrying capacity is provided by the overall structure formed by multi-bucket before soil failure. Compared with the conventional single-bucket foundation, there are mainly tension and pressure that are applied to the multi-bucket foundation, so that the carrying capacity of the foundation can be fully utilized. The probability of soil failure can be well reduced with the proposed multi-bucket foundation, and the stress transmission of force-transferring structure is more consistent through steel beams with variable cross-section. 相似文献
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Suction foundations have been deployed in the last three decades in a growing number of offshore developments, for bottom-fixed and floating structures, in shallow and deep waters, many of them successfully. Suction foundations, traditionally used as anchors and jacket foundations in the oil and gas industry, are now also used in the offshore renewable (wind) industry, e.g. for monopods, tripods, and jackets. When technically feasible, suction foundations are often cheaper than pile foundations. Additionally, their installation is relatively noise-free and, by applying overpressure, they can be removed during decommissioning. This paper focuses on the more complex design issues and some pitfalls related to suction foundation design. Additionally design practices and recommendations for suction caisson design, including installation and extraction feasibility, foundation resistance, settlements and response in sand, clay and layered soil profiles, will be presented for basic understanding. 相似文献
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邓小平强调 ,社会主义民主的本质特征是个人利益和集体利益、局部利益和整体利益、暂时利益和长远利益的辩证统一。社会主义民主之所以在本质上不同于资本主义民主 ,就在于两种民主的价值基础不同 ,对个体与整体 ,权利与义务关系的认识不同。从根本上说 ,就是两种民主赖以存在的价值哲学基础和社会基础不同。邓小平民主理论的逻辑基础 ,来自于马克思主义价值哲学和唯物史观。 相似文献