裂隙粗糙度对MICP充填效果的影响
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摘要
为了研究裂隙粗糙度对微生物诱导碳酸钙沉淀(Microbial induced calcite precipitation,MICP)过程的影响,本文使用含预制裂隙的类岩石试样进行MICP注浆实验,并拍照记录注浆过程,同时测量试样的波速变化及裂隙中充填的碳酸钙含量并计算产率。结果表明,随着裂隙粗糙度的增大,MICP注浆过程中浆液扩散范围增大,碳酸钙充填的均匀性,波速变化和碳酸钙产率均呈先上升后下降的趋势。试样波速最高提高了8.3%,碳酸钙产率最高可达82%。试验说明,裂隙粗糙度对MICP过程会产生影响,MICP在粗糙度适中的裂隙中会产生更好的效果。
In order to study the effect of fracture roughness on the microbial induced calcite precipitation(MICP) process,this paper used a rock-like sample with pre-formed fissures for MICP grouting experiments, and recorded the grouting process using a photographing device, meanwhile the wave velocities of sample were measured and the content of calcium carbonate filled in the crack was measured and the yield was calculated. The results showed that with the increase of fracture roughness, the diffusion range of the slurry increased during the MICP grouting process, and the uniformity of calcium carbonate filling, the change of wave velocity and the yield of calcium carbonate increased first and then decreased. The top sample wave velocity went up to 8.3% and the top yield of calcium carbonate was up to 82%. Which have shown that crack roughness has an effect on the MICP process, and MICP produces better results in cracks with moderate roughness.
In order to study the effect of fracture roughness on the microbial induced calcite precipitation(MICP) process,this paper used a rock-like sample with pre-formed fissures for MICP grouting experiments, and recorded the grouting process using a photographing device, meanwhile the wave velocities of sample were measured and the content of calcium carbonate filled in the crack was measured and the yield was calculated. The results showed that with the increase of fracture roughness, the diffusion range of the slurry increased during the MICP grouting process, and the uniformity of calcium carbonate filling, the change of wave velocity and the yield of calcium carbonate increased first and then decreased. The top sample wave velocity went up to 8.3% and the top yield of calcium carbonate was up to 82%. Which have shown that crack roughness has an effect on the MICP process, and MICP produces better results in cracks with moderate roughness.
引文
[1] Duffaut P. The traps behind the failure of Malpasset arch dam, France, in 1959[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2013,5(5):335-341
[2] Kilburn CRJ, Petley DN. Forecasting giant, catastrophic slope collapse:lessons from Vajont, Northern Italy[J]. Geomorphology,2003,54(1):21-32
[3] Rose ND, Hungr O. Forecasting potential rock slope failure in open pit mines using the inverse-velocity method[J].International Journal of Rock Mechanics&Mining Sciences, 2007,44(2):308-320
[4] Castanier S, Métayer-Levrel GL, Perthuisot JP. Ca-carbonates precipitation and limestone genesis—the microbiogeologist point of view[J]. Sedimentary Geology, 1999,126(1-4):9-23
[5] Stocks-Fischer S, Galinat JK, Bang SS. Microbiological precipitation of Ca CO3[J]. Soil Biology&Biochemistry,1999,31(11):1563-1571.
[6] Whiffm VS. Microbial Ca CO3 precipitation for the production of biocement[D]. Western Australia:Murdoch University, 2004
[7]钱春香,王安辉,王欣.微生物灌浆加固土体研究进展[J].岩土力学,2015,36(6):1537-1548
[8] Dejong JT, Fritzges MB, Nüsslein K. Microbially Induced Cementation to Control Sand Response to Undrained Shear[J]. Journal of Geotechnical&Geoenvironmental Engineering, 2006,132(11):1381-1392
[9] Paassen LAV, Ghose R, Linden TJMVD, et al. Quantifying Bio-Mediated Ground Improvement by Ureolysis:A Large Scale Biogrout Experiment[J]. Journal of Geotechnical&Geoenvironmental Engineering, 2010,136(12):1721-1728
[10]刘璐,沈扬,刘汉龙,等.微生物胶结在防治堤坝破坏中的应用研究[J].岩土力学,2016,37(12):3410-3416
[11] LI D, TIAN KL, ZHANG HL, et al. Experimental investigation of solidifying desert aeolian sand using microbially induced calcite precipitation[J]. Construction and Building Materials, 2018,172:251-262
[12]刘汉龙,肖鹏,肖杨,等.MICP胶结钙质砂动力特性试验研究[J].岩土工程学报,2018,40(1):38-45
[13] Ramachandran SK. Remediation of Concrete Using Micro-Organisms[J]. Aci Material Journal, 2001,98(4):3-9
[14] Harkes MP, Paassen LAV, Booster JL, et al. Fixation and distribution of bacterial activity in sand to induce carbonate precipitation for ground reinforcement[J]. Ecological Engineering, 2010,36(2):112-117
[15] Salifu E, Maclachlan E, Iyer KR, et al. Application of microbially induced calcite precipitation in erosion mitigation and stabilisation of sandy soil foreshore slopes:A preliminary investigation[J]. Engineering Geology, 2016,201(4):96-105
[16] Barton N, Choubey V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics, 1977,10(1-2):1-54
[17]赵茜.微生物诱导碳酸钙沉淀(MICP)固化土壤实验研究[D].北京:中国地质大学,2014
[2] Kilburn CRJ, Petley DN. Forecasting giant, catastrophic slope collapse:lessons from Vajont, Northern Italy[J]. Geomorphology,2003,54(1):21-32
[3] Rose ND, Hungr O. Forecasting potential rock slope failure in open pit mines using the inverse-velocity method[J].International Journal of Rock Mechanics&Mining Sciences, 2007,44(2):308-320
[4] Castanier S, Métayer-Levrel GL, Perthuisot JP. Ca-carbonates precipitation and limestone genesis—the microbiogeologist point of view[J]. Sedimentary Geology, 1999,126(1-4):9-23
[5] Stocks-Fischer S, Galinat JK, Bang SS. Microbiological precipitation of Ca CO3[J]. Soil Biology&Biochemistry,1999,31(11):1563-1571.
[6] Whiffm VS. Microbial Ca CO3 precipitation for the production of biocement[D]. Western Australia:Murdoch University, 2004
[7]钱春香,王安辉,王欣.微生物灌浆加固土体研究进展[J].岩土力学,2015,36(6):1537-1548
[8] Dejong JT, Fritzges MB, Nüsslein K. Microbially Induced Cementation to Control Sand Response to Undrained Shear[J]. Journal of Geotechnical&Geoenvironmental Engineering, 2006,132(11):1381-1392
[9] Paassen LAV, Ghose R, Linden TJMVD, et al. Quantifying Bio-Mediated Ground Improvement by Ureolysis:A Large Scale Biogrout Experiment[J]. Journal of Geotechnical&Geoenvironmental Engineering, 2010,136(12):1721-1728
[10]刘璐,沈扬,刘汉龙,等.微生物胶结在防治堤坝破坏中的应用研究[J].岩土力学,2016,37(12):3410-3416
[11] LI D, TIAN KL, ZHANG HL, et al. Experimental investigation of solidifying desert aeolian sand using microbially induced calcite precipitation[J]. Construction and Building Materials, 2018,172:251-262
[12]刘汉龙,肖鹏,肖杨,等.MICP胶结钙质砂动力特性试验研究[J].岩土工程学报,2018,40(1):38-45
[13] Ramachandran SK. Remediation of Concrete Using Micro-Organisms[J]. Aci Material Journal, 2001,98(4):3-9
[14] Harkes MP, Paassen LAV, Booster JL, et al. Fixation and distribution of bacterial activity in sand to induce carbonate precipitation for ground reinforcement[J]. Ecological Engineering, 2010,36(2):112-117
[15] Salifu E, Maclachlan E, Iyer KR, et al. Application of microbially induced calcite precipitation in erosion mitigation and stabilisation of sandy soil foreshore slopes:A preliminary investigation[J]. Engineering Geology, 2016,201(4):96-105
[16] Barton N, Choubey V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics, 1977,10(1-2):1-54
[17]赵茜.微生物诱导碳酸钙沉淀(MICP)固化土壤实验研究[D].北京:中国地质大学,2014