复合地基上褥垫层设计的理论与试验研究

李进军; 黄茂松; 史三元

doi:10.13204/j.gyjz200311002

复合地基上褥垫层设计的理论与试验研究

doi: 10.13204/j.gyjz200311002

基金项目:

国家重点基础研究发展计划资助项目(2004CB619106)

计量
- 文章访问数: 43
- HTML全文浏览量: 10
- PDF下载量: 96
- 被引次数: 0
出版历程
- 收稿日期: 2009-12-24
- 修回日期: 2009-12-24
- 刊出日期: 2003-11-20

Funds:

Supported by National Basic Research Program of China (No.2004CB619106)

摘要

摘要: 复合地基上褥垫层的设计是桩体复合地基设计的关键技术，通过对桩土应力比与褥垫层厚度关系的理论推导分析，并采用在水泥土桩单桩复合地基载荷试验中设置不同厚度褥垫层的方法，得到了褥垫层作用下桩土应力比的分布规律，此分布规律与理论分析一致。该研究为复合地基褥垫层合理厚度的设置及复合地基优化设计提供了依据

Abstract: Objective To summarize the clinical features and analyze the serologic test results of latent syphilis. Methods The clinical data of 601 patients with latent syphilis who were treated in the sexually transmitted disease centre of Peking Union Medical College Hospital between January 2001 and November 2007 were retrospectively analyzed. Results Of the 601 cases of latent syphilis,there were 174 cases of early latent syphilis(EL),170 cases of late latent syphilis(LL),and 257 cases of unknown latent syphilis. Male to female ratio was 0.74:1（256 males and 345 females,respectively). Patients aged 20-39 years accounted for the largest proportion. Non-marital sexual intercourse was the main route of infection. Forty-six patients (7.65%) were co-infected with other sexually transmitted diseases. A total of 251 cases of latent syphilis (41.76%) were confirmed when the patients were receiving tests for other sexually transmitted diseases or suspected sexually transmitted diseases. Of the 601 patients with EL,LL and unknown latency,the proportion of serum rapid plasma reagin(RPR) titers higher than or equal to 8 were 72.99% (127/174),52.94% (90/170),and 60.31%(155/257),respectively. Compared with the early syphilis,serological negative conversion rate was significantly lower after treatment for l2 months in the early latent syphilis patients (P=0.044). Conclusion Education and awareness raising on syphilis should be strengthened to lower the prevalence of latent syphilis.

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参考文献(12)

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