带肋排水板-真空预压处理工程废泥浆试验研究

蔡瑛; 钟颖炘; 曾芳金; 曹宇; 张世祥; 李校兵; 谢忠武; 符洪涛; 叶舒祥; 李淑芳

doi:10.3724/j.gyjzG22120208

带肋排水板-真空预压处理工程废泥浆试验研究

doi: 10.3724/j.gyjzG22120208

1. 温州大学建筑工程学院, 浙江温州 325035;
2. 江西理工大学土木与测绘工程学院, 江西赣州 341411;
3. 中铁十六局集团有限公司, 北京 100018;
4. 温州市教育基建中心, 浙江温州 325000

基金项目:

国家自然科学基金项目(52178348,52178350)

浙江省自然科学基金项目(LY20E080029)

温州市科技项目(S20210004)。

详细信息

作者简介:
蔡瑛,实验师,硕士,主要从事地基处理研究。电子信箱:00152006@wzu.edu.cn

计量
- 文章访问数: 7
- HTML全文浏览量: 1
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2022-12-02
- 网络出版日期: 2025-01-04
- 刊出日期: 2024-12-20

Experimental Study on Waste Construction Slurry Treated with Rib-Prefabricated Horizontal Drains by Vacuum Preloading Methods

1. School of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, China;
2. School of Civil Engineering and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341411, China;
3. China Railway 16th Bureau Group Co., Ltd., Beijing 100018, China;
4. Wenzhou Education Infrastructure Center, Wenzhou 325000, China

摘要

摘要: 传统真空预压法处理工程废弃泥浆存在排水板易淤堵、变形以及真空衰减等问题。基于此,提出了一种带肋排水板真空预压处理工程废浆的方法。通过5组室内真空预压模型试验,对加固过程中试验模型的孔隙水压力、排水量、真空度以及土层表面沉降进行监测,并对排水板滤膜进行电子显微镜扫描,分析不同肋宽比下带肋排水板对工程废浆固结的影响。试验结果表明:带肋排水板在泥浆真空固结过程中能提高真空的传递效率、削弱排水板滤膜淤堵;0.5的肋宽比使带肋排水板性能达到最佳,处理后土体平均含水率和十字板剪切强度分别为38.51%和32.38 kPa,有效地提高了加固后土体的整体强度。通过对排水板滤膜的微观结构的分析,发现肋宽比直接影响同宽度下带肋排水板的淤堵情况,0.5的肋宽比能将带肋排水板的排水性能发挥至最佳。
- 真空预压 /
- 带肋排水板 /
- 肋宽比 /
- 工程废浆 /
- 淤堵效应
Abstract: The traditional vacuum preloading method used to treat waste construction slurry. As there were some problems involving clogging and deformation of drain boards and vacuum attenuation in the traditional vacuum preloading treatment, a method of vacuum preloading with Rib-prefabricated horizontal drains (RPHD) was proposed to treat waste construction slurry. Five groups of indoor vacuum preloading model tests were performed to measure the pore water pressure, water discharge, vacuum degree and surface settlement of soil specimens during the reinforcement processes. Simultaneously, the filter membranes of drainage boards were scanned with electron microscopes to analyze the effect of rib width ratios of RPHD on consolidation of waste construction slurry. The test results indicated that RPHD could improve the vacuum transfer efficiency and weaken the clogging of filter membranes of drainage boards during consolidation of waste construction slurry by the vacuum preloading method. A rib width ratio of 0.5 for ribbed drainage boards achieved the optimal performance of water discharge. The mean moisture content and the vane shear strength of treated soil specimens were respectively 38.51% and 32.38 kPa after reinforcement, which effectively improved the strength of reinforced soil. Analyzing the microstructure of filter membranes of drainage boards, it was found that the rib width ratio directly related the clogging of the ribbed drainage boards in the same width of drainage boards, and rib width ratio of 0.5 could fully play the drainage performance of RPHD.
- vacuum preloading /
- rib-prefabricated horizontal drain /
- rib-width ratio /
- waste construction slurry /
- clogging effect

HTML全文

参考文献(28)

[1]	中华人民共和国住房和城乡建设部.建筑地基处理技术规范:JGJ 79—2012 [S]. 北京:中国建筑工业出版社,2012.
[2]	刘松玉,周建,章定文,等.地基处理技术进展[J].土木工程学报,2020,53(4):93-110.
[3]	万玉刚,于学海.桩基工程泥浆水处理技术[J].环境工程,1999,17(1):14-16.
[4]	武亚军,陆逸天,牛坤,等.药剂真空预压法处理工程废浆试验[J].岩土工程学报,2016,38,(8):1365-1373.
[5]	蔡袁强.吹填淤泥真空预压固结机理与排水体防淤堵处理技术[J]. 岩土工程学报,2021,43(2):201-225.
[6]	詹良通,江文豪,王顺玉,等.工程泥浆自重固结及低位真空加载过程的大型模型试验研究[J].岩土工程学报,2020,42,(增刊1): 32-37.
[7]	詹良通,张斌,郭晓刚,等.废弃泥浆底部真空-上部堆载预压模型试验研究[J].岩土力学,2020,41(10):3245-3254.
[8]	魏福强.软土地基处理技术的研究进展[J].工业建筑,2023,53(增刊1): 445-447.
[9]	李长辉,武航,程国勇,等.不同排水板真空预压软土加固对比试验研究[J].岩土力学,2022,43(10):2819-2827.
[10]	刘敏,冯海暴,赵莎莎,等.初始含水率对吹填土地基真空预压加固效果影响分析[J].中国港湾建设,2023,43(8):78-82.
[11]	XU B H, HE N, JIANG Y B, et al. Experimental study on the clogging effect of dredged fill surrounding the PVD under vacuum preloading [J]. Geotextiles and Geomembranes, 2020, 48(5): 614-624.
[12]	ZHOU Y, CHAI J C. Equivalent ‘smear' effect due to non-uniform consolidation surrounding a PVD [J]. Geotechnique, 2017, 67(5): 410-419.
[13]	蔡袁强.吹填淤泥真空预压固结机理与排水体防淤堵处理技术[J].岩土工程学报,2021,43(2):201-225.
[14]	WANG J, CAI Y Q, MA J J, et al. Improved vacuum preloading method for consolidation of dredged clay-slurry fill [J/OL]. Journal of Geotechnical and Geoenvironmental Engineering, 2016, 142(11)[2022-12-02]. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001516.
[15]	WANG P, HAN Y B, WANG J, et al. Deformation characteristics of soil between prefabricated vertical drains under vacuum preloading [J]. Geotextiles and Geomembranes,2021,47(6):798-802.
[16]	WANG P, HAN Y B, ZHOU Y, et al. Apparent clogging effect in vacuum-induced consolidation of dredged soil with prefabricated vertical drains [J]. Geotextiles and Geomembranes, 2020,48:524-531.
[17]	蔡袁强, 周岳富,王鹏,等.考虑淤堵效应的疏浚淤泥真空固结沉降计算[J]. 岩土力学, 2020, 41(11): 3705-3713.
[18]	WANG J, NI J F, CAI Y Q, et al. Combination of vacuum preloading and lime treatment for improvement of dredged fill [J]. Engineering Geology, 2017, 227(1): 149-158.
[19]	王军,蔡袁强,符洪涛,等.新型防淤堵真空预压法室内与现场试验研究[J]. 岩石力学与工程学报, 2014, 33(6): 1257-1268.
[20]	FU H T, CHAI J C. Performance of a winged PVD (WPVD) for vacuum consolidation of soft clayey deposits [J/OL]. Transportation Geotechnics, 2020, 24[2022-12-02]. https://doi.org/10.1016/j.trgeo.2020.100370Get rights and content.
[21]	卢萌盟,张强,靖洪文,等. 基于环形等效的排水板地基固结[J]. 岩石力学与工程学报,2018,37(2):513-520.
[22]	黄朝煊,邓岳保,胡国杰.基于排水体椭圆柱假定的井阻非线性竖井地基固结理论[J]. 岩石力学与工程学报, 2017, 36(3): 725-735.
[23]	黄朝煊,方咏来.线性加载下塑料排水板地基固结理论探讨[J]. 工程地质学报, 2017, 25(3): 678-685.
[24]	田乙,吴文兵,梅国雄,等.塑料排水板联合真空预压的径向固结理论研究[J]. 岩石力学与工程学报, 2019, 38(10): 2151-2160.
[25]	TIAN Y, WU W B, WEN M J, et al. Nonlinear consolidation of soft foundation improved by prefabricated vertical drains based on elliptical cylindrical equivalent model [J]. International Journal For Numerical And Analytical Methods In Geomechanics, 2021, 45(13):1949-1971.
[26]	CHAI J C, FU H T, WANG J, et al. Behaviour of a PVD unit cell under vacuum pressure and a new method for consolidation analysis [J/OL]. Computers and Geotechnics, 2020,120[2022-12-02]. https://doi.org/10.1016/j.compgeo.2019.103415.
[27]	雷华阳,刘安仪,刘锦景,等.超软土地基交替式真空预压法加固效果影响因素分析[J]. 岩石力学与工程学报, 2022, 41(2): 377-388.
[28]	冯双喜,雷华阳,万勇峰,等. 新型辐射排水板真空预压加固效果[J]. 中南大学学报(自然科学版), 2021,52(3): 790-805.