新型水下聚凝充填材料模拟填筑试验研究

作者:林珊 阮艳妹 罗旭 梅源
单位:广州地铁设计研究院股份有限公司 西安建筑科技大学土木工程学院 陕西省岩土与地下空间工程重点实验室
摘要:针对地下工程建设中遇到的溶洞填充问题,根据溶洞特点,设计制作半封闭带压溶洞模拟箱,模拟施工现场的注浆填充工艺,进行新型水下聚凝充填材料(NWC-FM)注浆模拟试验。结果表明:NWC-FM材料每次浇筑完成后表面会迅速形成一层白色絮状析出胶凝物,分布较均匀,随时间的增加最终形成一道2~3cm隔离层,且NWC-FM模拟填筑试验的芯样随养护时间增加强度逐渐提高,7,14,28d的平均抗压强度分别为0.54,0.72,0.79MPa,可满足水下溶洞填筑工程现场的要求。
关键词:岩溶溶洞水下聚凝充填材料模拟试验浇筑抗压强度
作者简介:林珊,教授级高级工程师,E-mail:linshan@gmdi.cn。
基金:陕西省重点研发计划:黄土地区复合地层盾构法建造地铁隧道环境扰动控制技术(2020SF-373)。 -页码-:51-54
尊敬的用户,本篇文章需要20元,点击支付交费后阅读
参考文献[1] 景瑞旭,武俊文,王向东.突出煤层附近小型岩溶构造的危害及治理方法[J].山西焦煤科技,2019,43(11):12-14.
[2] 冯国倍.简析岩溶地质的危害及处理措施[J].西部资源,2018(1):60-61.
[3] 但新球,贺东北,吴协保,等.中国岩溶地区生态特征与石漠化危害探讨[J].中南林业调查规划,2018,37(1):62-66.
[4] 郭虎.基于有限元分析法的溶洞对桩基沉降的影响研究[J].公路工程,2019,44(3):234-239.
[5] 陈志健.地铁隧道的溶洞处理措施[J].价值工程,2018,37(14):236-237.
[6] 许凯.广州地铁9号线隧道溶洞处理原则优化研究[J].山西建筑,2016,42(23):170-171.
[7] 张瑞云.工程泥浆的再生调制与废弃处理[J].铁道建筑,2003(3):42-43.
[8] 刘豫东,王洪新.泥水加压盾构泥水分离与处理方法及模式[J].现代隧道技术,2007(2):56-60,71.
[9] 吴志红,丁忠健.钻井废弃泥浆固化处理技术的研究与应用[J].石油化工应用,2008,27(6):44-47.
[10] 房凯,张忠苗,刘兴旺,等.工程废弃泥浆污染及其防治措施研究[J].岩土工程学报,2011,33(S2):238-241.
[11] 董邑宁,张青娥,徐日庆,等.固化剂对软土强度影响的试验研究[J].岩土力学,2008(2):475-478.
[12] 杨爱武,王韬,许再良.石灰及其外加剂固化天津滨海软土的试验研究[J].工程地质学报,2015,23(5):996-1004.
[13] SOWERS GEORGE F.Building on sinkholes:Design and construction of foundations in karst terrain[M].American society of civil engineers,1996.
[14] 任新红.南广铁路岩溶路基注浆效果检测方法与评价指标研究[D].成都:西南交通大学,2013.
[15] 雷金山.广州地铁隐伏型岩溶地基稳定性分析及充填处理技术研究[D].长沙:中南大学,2014.
[16] 李雄周,王星星,秦之富.云南省某高速公路隧道岩溶段处治技术研究[J].地下空间与工程学报,2017,13(S1):433-441.
Experimental Study on Simulated Filling of New Type of Underwater Coagulant Filling Material
LIN Shan RUAN Yanmei LUO Xu MEI Yuan
(Guangzhou Metro Design Research Institute Co., Ltd. College of Civil Engineering, Xi'an University of Architecture and Technology Shaanxi Key Lab of Geotechnical and Underground Space Engineering)
Abstract: In view of the problem of cave filling encountered in underground engineering construction, and in accordance with the characteristics of the cave, a semi-closed cave simulation box with pressure is designed and produced to simulate the filling process of the filling material at the construction site, and a simulation test of a new type of underwater coagulant filling material(NWC-FM) slurry is carried out. The results show that a layer of white flocculent-like gel will soon be formed in the surface of NWC-FM material after each pouring and the distribution is comparatively uniform. With the increase of time, a 2~3 cm isolation layer is finally formed, and the intensity of the core sample of NWC-FM simulation filling test grows with the increase of maintenance time, and the average pressure strengths of 7, 14, 28 d were 0.54, 0.73, 0.79 MPa, respectively, hence meeting the requirements of the underwater cave filling project site.
Keywords: karst caves; underwater coagulant filling material; simulation test; pouring; compressive strength
1310 0 0
文字:     A-     A+     默认 取消