冻融对固化钻井泥浆强度及重金属浸出量影响  

Influence of Freeze-thaw Cycles on Strength and Heavy Mental Leaching Performance of Petroleum Drilling Mud Stabilized by Waste

作　　者：程寅[1] 于浩 李钦栋 陈景[1] 李亚非[1] Cheng Yin;Yu Hao;Li Qindong;Chen Jing;Li Yafei(Engineering Technology and Materials Research Center,China Academy of Transportation Science,Beijing 100029,P.R.China;Xinjiang Chuxianglutong Engineering Technology Consulting Services Ltd.,Urumqi 830000,P.R.China;Civil Engineering Department,Anhui Communications Vocational,Technical College,Hefei 230051,P.R.China)

机构地区：[1]交通运输部科学研究院工程技术与材料研究中心,北京100029 [2]新疆楚湘路通工程技术咨询服务有限公司,乌鲁木齐830000 [3]安徽交通职业技术学院土木工程系,合肥230051

出　　处：《地下空间与工程学报》2020年第5期1405-1411,共7页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(51178021,51809129);中央级公益性科研院所基本科研业务费(20177512)。

摘　　要：在石油钻井过程中会产生大量含重金属废弃钻井泥浆,对环境污染很大,需进行无害化处理。本研究采用水泥和工业废渣固化废弃钻井泥浆,经过不同次数的冻融循环后,测试固化土强度、固化土中Pb2+离子和Cr6+离子的浸出量以及固化土中的孔隙变化规律,探讨工业废渣固化废弃钻井泥浆的抗冻性能。结果表明:固化土试件的强度均随着冻融循环次数的增加而下降;固化剂组分中工业废渣的掺量增加,特别是磷石膏掺量增加能够有效的减弱固化土在冻融循环作用下的强度损失。工业废渣能够有效的稳定固化土中的Pb2+离子和Cr6+离子,浸出量比水泥固化土降低70%~80%。对固化土孔隙的测试结果证实由工业废渣固化的固化土试件的密实度大于仅由水泥固化的试件。Plenty of waste drilling mud contained heavy metals is produced during oil drilling process,which will cause great pollution to the environment,and therefore it need to be treated harmlessly. This study used industrial waste and Portland Cement stabilized waste drilling mud. The unconfined compress strength,the leaching amount of Pb2+ ions and Cr6+ ions,and the pore size of the stabilized soil were tested after different times of freezing-thawing cycles. The antifreeze performance of stabilized drilling mud with industrial waste was discussed. The results show that the strength of the stabilized soil decreases with the increase of freeze-thaw cycles. The strength loss of stabilized soil after freeze-thaw cycles can be effectively reduced by increasing the content of industrial waste,especially the content of phosphogypsum,in the stabilizer component. Pb2+ ions and Cr6+ ions can be effectively stabilized by industrial waste. The leaching amount is 70% ~ 80% lower than that of cement stabilized soil. The results of pores test prove that the compactness of stabilized soil solidified by industrial waste residue is greater than that of cement only.

关 键 词：钻井泥浆 工业废渣 固化 冻融循环 磷石膏 

分 类 号：TU449[建筑科学—岩土工程]