改进的海相淤泥搅拌桩成桩效果试验研究

唐昌意; 刘文献; 吴章平; 陈惠进; 周萌

doi:10.13204/j.gyjzG21061905

改进的海相淤泥搅拌桩成桩效果试验研究

doi: 10.13204/j.gyjzG21061905

1. 珠海市规划设计研究院, 广东珠海 519000;
2. 武汉谦诚桩工科技股份有限公司, 武汉 430000;
3. 华夏幸福(珠海)产业新城发展有限公司, 广东珠海 519000;
4. 中冶建筑研究总院有限公司, 北京 100088;
5. 清华大学, 北京 100084

基金项目:

珠海市产学研合作项目(ZH22017001200149PWC)。

详细信息

作者简介:
唐昌意,男,1984年出生,高级工程师,注册土木工程师(岩土)。

通讯作者:
周萌,男,1991年出生,博士后,高级工程师,zhoum07@foxmail.com。

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- 文章访问数: 197
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- 被引次数: 0
出版历程
- 收稿日期: 2021-06-19
- 网络出版日期: 2022-09-05

Experimental Research on Pile-Forming Effect of Improved Marine Silt Mixing Pile

1. Zhuhai Institute of Urban Planning Design, Zhuhai 519000, China;
2. Wuhan Qiancheng Pile Engineering Science and Technology Company Limited, Wuhan 430000, China;
3. China Fortune Land Industrial New Town Development Company limited, Zhuhai 519000, China;
4. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China;
5. Tsinghua University, Beijing 100084, China

摘要

摘要: 现场试桩是合理确定施工工艺、固化剂掺入量及评判成桩效果的有效手段。为了探究新型钻头和新型固化剂加固海相淤泥的成桩效果及适用性,依托珠海市斗门区某市政道路项目,针对该项目软土路基海相淤泥的性质,开展了不同钻头、不同固化剂的现场试桩工作,测试了不同深度处芯样的无侧限抗压强度和直剪强度,研究不同因素对成桩效果的影响。结果表明:改进的钻头采用两搅两喷施工工艺成桩效果较好,可节约一半工期;相同钻头条件下新型固化剂成桩完整性明显优于纯水泥固化剂;采用RQD值折减后无侧限抗压强度和直剪强度更贴合工程实际;直剪强度可取无侧限抗压强度的40%。
- 搅拌桩 /
- 海相淤泥 /
- 新型钻头 /
- 新型固化剂 /
- 成桩效果
Abstract: In-situ test piling is an effective method to reasonably determine the construction technology and the dosage of curing agent, and to evaluate the effect of piling formation. In order to explore the pile-forming effect and applicability of the new drilling bits and the new curing agent for strengthening marine silt, relying on a municipal road project in Doumen District of Zhuhai City, aiming at the properties of marine silt soft soil, both the unconfined compressive strength test (UCS) and direct shear strength test (DST) were conducted to explore the effects of the pile-forming effect with different drill bits and different curing agent dosages.The results showed that the improved drilling bit adopted the construction technology of twice mix for two spraying was more effective, which could save half the construction period. The pile integrity of new curing agent was better than that of pure cement curing agent using the same bit. It was found that the unconfined compressive strength and direct shear strength reduced by RQD value were more suitable for engineering construction. Besides, direct shear strength could take 40% of the unconfined compressive strength.
- mixing pile /
- marine silt /
- new drilling bits /
- new curing agent /
- pile-forming effect

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参考文献(15)

[1]	李宜成,高国龙,王庆,等.滨海地区淤泥质黏土水泥土搅拌桩施工技术研究[J].广东土木与建筑,2018,25(9):43-46.
[2]	汤永辉.珠三角深厚软土地基双向水泥土搅拌桩试验研究[J].广东公路交通,2013(6):39-42.
[3]	潘观强.不同搅拌桩现场对比试验研究[J].广东公路交通,2013(1):48-50.
[4]	周小军,向灵芝,汪昭宇.钉形水泥土双向搅拌桩加固软土地基的设计及应用[J].公路交通技术,2018,34(1):5-9.
[5]	XIE W Y, PENG C. Monitoring of deep foundation pit support and construction process in soft soil area of pearl river delta[J]. IOP Conference Series,2018,128(1):12-97.
[6]	陈盛原,叶华洋,张伟锋,等.水泥搅拌桩联合堆载固结法对海相软土不同处理方式的试验研究[J].科学技术与工程,2020,20(30):12533-12539.
[7]	潘殿琦,孟祥源.水泥搅拌咬合桩的施工与检测[J].岩石力学与工程学报,2004(3):518-521.
[8]	宇珂,王栋,黄志滨,等.水泥搅拌桩在滨海软土地基加固中的应用分析[J].路基工程,2021(1):174-178.
[9]	黄雨,周子舟,柏炯,等.石膏添加剂对水泥土搅拌法加固软土地基效果影响的微观试验分析[J].岩土工程学报,2010,32(8):1179-1183.
[10]	XIN H G, WU G D, XIN H G. Study on the scope of application of cement deep mixing pile to consolidate soft soils[J]. Applied Mechanics and Materials, 2013,42(3):1169-1172.
[11]	张本蛟,黄斌,傅旭东,等.水泥土芯样强度变形特性及本构关系试验研究[J].岩土力学,2015,36(12):3417-3424.
[12]	吴迎花.沿海地区水泥搅拌桩处理软土地基工艺比选[J].公路交通科技(应用技术版),2016,12(11):212-214.
[13]	徐超,董天林,叶观宝.水泥土搅拌桩变掺量施工工艺研究[J].建筑结构,2005,35(10):71-73.
[14]	WEN T R. Study on construction parameter of cement deep mixing piles[J]. Applied Mechanics and Materials,2012,20(31):226-228.
[15]	何开胜,陈泽虎.高黏性软土中水泥搅拌桩的施工工艺和检测评估方法[J].工业建筑,2017,47(2):141-144.