Seismic effects of construction sites in Binhai New Area
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摘要: 在对滨海新区区域地质背景进行分析的基础上，统计了滨海新区百余项工程的地基土等效剪切波速、场地覆盖层厚度，并对滨海新区的场地类别进行了划分，给出了滨海新区不同建筑场地的分布范围及地震动参数；对滨海新区3932个岩土工程勘察钻孔进行了液化判定，综合滨海新区地震调查实际喷水冒砂调查点位及非液化勘察钻孔分布情况，给出了滨海新区液化土层的分布范围及液化等级分区。研究结果表明：（1）滨海新区埋深20 m以内的地基土等效剪切波速一般介于140.0～170.0 m/s，均属软弱—中软土，场地覆盖层厚度多在90～100 m；（2）滨海新区大部分地区场地类别为Ⅳ类场地，仅北部滨海旅游区、西部空港经济区以及北大港水库以西地区为Ⅲ类场地；（3）滨海新区液化区域主要分布在汉沽、塘沽及大港部分地区，其中，中等液化区主要分布在大港、汉沽南部、军粮城及塘沽海河附近，严重液化区仅在中新生态城附近分布。Abstract: Based on the analysis of the regional geological background of the Binhai New Area, this paper statistically analyzed the equivalent shear wave velocity of foundation soils and the site overburden thickness from more than a hundred projects in the Binhai New Area. It also classified the site categories of the Binhai New Area and provided the distribution range and ground motion parameters for different architectural sites. Furthermore, the paper conducted liquefaction determination for 3932 geotechnical investigation boreholes in the Binhai New Area. By integrating the actual spouting sand investigation points from seismic surveys and the distribution of non-liquefaction investigation boreholes in the Binhai New Area, the paper delineated the distribution range and liquefaction grade zoning of the liquefiable soil layers. The study results indicate: (1) The equivalent shear wave velocity of foundation soil above 20 m depth is generally 140.0~170.0 m/s, corresponding to soft to medium-soft soils. The site overburden thickness is mostly 90~100 m. (2) Most areas in the Binhai New Area are categorized as Class Ⅳ sites, with only the northern Binhai Tourism Area, the western Airport Economic Area, and the area west of Beidagang Reservoir classified as Class Ⅲ sites. (3) Liquefiable zones are primarily distributed in parts of Hangu, Tanggu, and Dagang, with moderate liquefaction areas mainly in the Dagang District, southern Hangu District, Junliangcheng, and near the Haihe River in Tanggu. Severe liquefaction areas are only distributed near the Sino-Singapore Tianjin Eco-City.
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Key words:
- Binhai New Area /
- seismic effects /
- site category /
- ground motion parameters /
- silt liquefaction
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图 2 滨海新区等效剪切波速试验实际材料图
Figure 2. Actual material map of equivalent shear wave velocity test in Binhai New Area
图 3 地基土等效剪切波速等值线及分区图
Figure 3. Contour and zonation map of equivalent shear wave velocity of foundation soil
图 4 滨海新区场地覆盖层厚度试验实际材料图
Figure 4. Actual material map of site overburden thickness test in Binhai New Area
图 5 滨海新区场地覆盖层厚度等值线图
Figure 5. Contour map of site overburden thickness in Binhai New Area
图 7 滨海新区地震动参数区划图
Figure 7. Seismic ground motion parameter zonation map of Binhai New Area
图 8 滨海新区地震喷水冒砂点位图
Figure 8. Distribution map of sand-blowing points induced by earthquake in Binhai New Area
图 9 滨海新区液化土层分布及液化等级分区图
Figure 9. Distribution of liquefied soil layers and liquefaction grade zonation map of Binhai New Area
图 10 近10年滨海新区典型地下潜水观测井水位动态变化图
Figure 10. Dynamic variation of groundwater level in typical phreatic observation wells in Binhai New Area in the past 10 years
表 1 滨海新区工程地质分区特征
Table 1. Characteristics of engineering geological zonation in Binhai New Area
特征 工程地质Ⅰ区 工程地质Ⅱ区 工程地质Ⅲ区 工程地质Ⅳ区 分布 分布界限 第Ⅱ贝壳堤以西 第Ⅱ贝壳堤以东；第Ⅰ贝壳堤以西 第Ⅰ贝壳堤以东 深切古河道区 主要区域 茶淀镇—汉南路，军粮城—东丽湖，大港—津岐公路沿线以西 茶淀镇—汉南路，军粮城—东丽湖，大港—津岐公路沿线以东；老海防公路沿线以西 老海防公路沿线以东 北部黄港水库—天津港沿线；中部葛沽镇—临港沿线；南部南港工业区内 工程地质特性评价 工程地质特性较好区，表层地基土沉积时间较长，陆相沉积层相对较厚，重要地基土厚度、埋深均较小，地基条件和施工条件相对较好 工程地质特性相对较好区，表层地基土沉积时间中等，陆相沉积厚度中等，重要地基土厚度、埋深中等，地基条件和施工条件一般 工程地质特性相对较差区，表层地基土沉积时间较短，陆相沉积厚度较薄，重要地基土厚度、埋深均较大，地基条件和施工条件相对较差 表层土工程地质特性与周边分区基本一致，但第Ⅰ海相层粉（砂）土厚度较大，工程性质较第Ⅱ、Ⅲ陆相层粉质黏土好，较第Ⅱ、Ⅲ陆相层粉（砂）土差 
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表 2 埋深20 m以内地基土等效剪切波速计算结果表
Table 2. Calculation results of equivalent shear wave velocity of foundation soil in 20 m buried depth
场地土类别 区间值/（m·s−1） 钻孔数 所占比例/% 软弱土 103.2～149.6 383 80 中软土 150.4～196.2 95 20
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表 3 滨海新区场地覆盖层厚度统计表
Table 3. Statistical table of site overburden thickness in Binhai New Area
序号 区间值/m 钻孔数 所占比例/% 1 ＜90 24 28 2 90～100 52 61 3 ＞100 9 11
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表 4 滨海新区场地特征周期调整表
Table 4. Adjustment table of site characteristic period in Binhai New Area
Ⅱ类场地基本地震动加速度
反应谱特征周期分区值场地类别 Ⅲ Ⅳ 0.40 0.55 0.75 0.45 0.65 0.90
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表 5 滨海新区场地地震动峰值加速度调整系数表
Table 5. Adjustment coefficient of peak ground acceleration for sites in Binhai New Area
Ⅱ类场地基本地震动
峰值加速度值场地类别 Ⅲ Ⅳ 0.15g 1.15 1.10 0.20g 1.00 1.00
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表 6 埋深20 m以上饱和粉土地震液化判别表
Table 6. Seismic liquefaction identification of saturated silt in 20 m buried depth
液化
判别液化
等级液化指数 钻孔数 占比（液化点内
部占比）/%液化点 轻微 0.1～5.8 162 4（53） 中等 6.0～17.2 105 3（34） 严重 18.1～43.2 39 1（13） 非液
化点3626 92
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[1] 潘品蒸. 天津滨海区工程地质稳定性分析及其开发对策[C]//全国第三次工程地质大会论文选集(下卷). 成都: 成都科技大学出版社, 1988: 256-262. (PAN P Z. Engineering geological stability analysis and development strategies for Tianjin Binhai Area[C]//Proceedings of the Third National Conference on Engineering Geology. Chengdu: Chengdu University of Science and Technology Press, 1988: 926-932. (in Chinese) PAN P Z. Engineering geological stability analysis and development strategies for Tianjin Binhai Area[C]//Proceedings of the Third National Conference on Engineering Geology. Chengdu: Chengdu University of Science and Technology Press, 1988: 926-932. (in Chinese) [2] 王志强, 蒋晓冬, 赵增敏, 等. 基于ANN与GIS技术的中新天津生态城地质环境适宜性评价[J]. 河北工业大学学报, 2010, 39(6): 87-91. (WANG Z Q, JIANG X D, ZHAO Z M, et al. Geological environmental sustainability assessment on China-Singapore Tianjin Ecological City by ANN and GIS coupling technology[J]. Journal of Hebei University of Technology, 2010, 39(6): 87-91. (in Chinese) doi: 10.3969/j.issn.1007-2373.2010.06.021WANG Z Q, JIANG X D, ZHAO Z M, et al. Geological environmental sustainability assessment on China-Singapore Tianjin Ecological City by ANN and GIS coupling technology[J]. Journal of Hebei University of Technology, 2010, 39（6）: 87-91. (in Chinese) doi: 10.3969/j.issn.1007-2373.2010.06.021 [3] 高梓旺, 黄艳萍, 李亚飞. 天津地区岩土工程勘察中地震效应重点问题分析[J]. 探矿工程(岩土钻掘工程), 2012, 39(11): 72-74. (GAO Z W, HUANG Y P, LI Y F. Analysis on key problems in evaluation of site and foundation seismic effect in geotechnical engineering investigation in Tianjin Area[J]. Exploration Engineering (Rock & Soil Drilling and Tunneling), 2012, 39(11): 72-74. (in Chinese)GAO Z W, HUANG Y P, LI Y F. Analysis on key problems in evaluation of site and foundation seismic effect in geotechnical engineering investigation in Tianjin Area[J]. Exploration Engineering (Rock & Soil Drilling and Tunneling), 2012, 39（11）: 72-74. (in Chinese) [4] 房万领, 李学云, 田德培, 等. 天津城市建设工程地质稳定性综合分析[J]. 地质调查与研究, 2016, 39(1): 64-70. (FANG W L, LI X Y, TIAN D P, et al. Comprehensive evaluation and analysis on the engineering geological stability of Tianjin urban construction[J]. Geological Survey and Research, 2016, 39(1): 64-70. (in Chinese) doi: 10.3969/j.issn.1672-4135.2016.01.008FANG W L, LI X Y, TIAN D P, et al. Comprehensive evaluation and analysis on the engineering geological stability of Tianjin urban construction[J]. Geological Survey and Research, 2016, 39（1）: 64-70. (in Chinese) doi: 10.3969/j.issn.1672-4135.2016.01.008 [5] 乔丽红, 张博夫, 刘晓磊, 等.天津中心城区建筑场地与地基的地震效应研究[C]//第十五届全国边坡工程技术大会, 2023. (QIAO L H, ZHANG B F, LIU X L, et al. Study on seismic effects of building sites and foundations in Tianjin central urban area[J]. 15th National Conference on Slope Engineering Technology, 2023. (in Chinese)QIAO L H, ZHANG B F, LIU X L, et al. Study on seismic effects of building sites and foundations in Tianjin central urban area[J]. 15th National Conference on Slope Engineering Technology, 2023. (in Chinese) [6] 天津市住房和城乡建设委员会. 天津市地基土层序划分技术规程: DB/T 29—191—2021[S]. 天津: 天津市建设管理委员会, 2009. (Tianjin Housing and Urban-Rural Construction Commission. Technical specification for division of subsoil sequence in Tianjin: DB/T 29—191—2021[S]. Tianjin: Tianjin Construction Administration Committee, 2009. (in Chinese)Tianjin Housing and Urban-Rural Construction Commission. Technical specification for division of subsoil sequence in Tianjin: DB/T 29—191—2021[S]. Tianjin: Tianjin Construction Administration Committee, 2009. (in Chinese) [7] 天津市城乡建设委员会. 天津市岩土工程技术规范: DB/T 29—20—2017[S]. 天津: 天津市建设管理委员会, 2017. (Tianjin Urban-Rural Construction Commission. Tianjin technical code for geotechnical engineering: DB/T 29—20—2017[S]. Tianjin: Tianjin Construction Administration Committee, 2017. (in Chinese)Tianjin Urban-Rural Construction Commission. Tianjin technical code for geotechnical engineering: DB/T 29—20—2017[S]. Tianjin: Tianjin Construction Administration Committee, 2017. (in Chinese) [8] 天津市城乡建设委员会. 天津市岩土工程勘察规范: DB/T 29—247—2017[S]. 天津: 天津市建设管理委员会, 2017. (Tianjin Urban-Rural Construction Commission. Code for investigation of geotechnical engineering in Tianjin: DB/T 29—247—2017[S]. Tianjin: Tianjin Construction Administration Committee, 2017. (in Chinese)Tianjin Urban-Rural Construction Commission. Code for investigation of geotechnical engineering in Tianjin: DB/T 29—247—2017[S]. Tianjin: Tianjin Construction Administration Committee, 2017. (in Chinese) [9] 中华人民共和国住房和城乡建设部, 中华人民共和国国家质量监督检验检疫总局. 建筑抗震设计规范: GB 50011—2010[S]. 北京: 中国建筑工业出版社, 2010. (Ministry of Housing and Urban-Rural Development of the People’s Republic of China, General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. Code for seismic design of buildings: GB 50011—2010[S]. Beijing: China Architecture & Building Press, 2010. (in Chinese)Ministry of Housing and Urban-Rural Development of the People’s Republic of China, General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. Code for seismic design of buildings: GB 50011—2010[S]. Beijing: China Architecture & Building Press, 2010. (in Chinese) [10] 周玉明, 郭进京, 温伟光, 等. 天津市滨海新区地基土类型及工程地质分区研究[J]. 地质调查与研究, 2016, 39(4): 293-299. (ZHOU Y M, GUO J J, WEN W G, et al. Research on the engineering geological zoning of foundation soil in Binhai New Area, Tianjin[J]. Geological Survey and Research, 2016, 39(4): 293-299. (in Chinese) doi: 10.3969/j.issn.1672-4135.2016.04.008ZHOU Y M, GUO J J, WEN W G, et al. Research on the engineering geological zoning of foundation soil in Binhai New Area, Tianjin[J]. Geological Survey and Research, 2016, 39（4）: 293-299. (in Chinese) doi: 10.3969/j.issn.1672-4135.2016.04.008 [11] 王步云. 唐山开滦吕家坨等矿区液化砂基再调查[J]. 工程勘察, 2010, 38(S1): 963-978. (WANG B Y. Reinvestigation on liquefied sand foundations in Tangshan Kailuan Lvjiatuo and other mines[J]. Geotechnical Investigation & Surveying, 2010, 38(S1): 963-978. (in Chinese)WANG B Y. Reinvestigation on liquefied sand foundations in Tangshan Kailuan Lvjiatuo and other mines[J]. Geotechnical Investigation & Surveying, 2010, 38(S1): 963-978. (in Chinese) [12] 李佳琦, 徐 佳, 刘 杰, 等. 天津地面沉降严重区分布特征及变化规律[J]. 中国地质灾害与防治学报, 2023, 34(2): 53-60. (LI J Q, XU J, LIU J, et al. Distribution characteristics and evolution trend of severe land subsidence areas in Tianjin City[J]. The Chinese Journal of Geological Hazard and Control, 2023, 34(2): 53-60. (in Chinese) doi: 10.16031/j.cnki.issn.1003-8035.202202041LI J Q, XU J, LIU J, et al. Distribution characteristics and evolution trend of severe land subsidence areas in Tianjin City[J]. The Chinese Journal of Geological Hazard and Control, 2023, 34（2）: 53-60. (in Chinese) doi: 10.16031/j.cnki.issn.1003-8035.202202041 [13] 陈国兴, 金丹丹, 常向东, 等. 最近20年地震中场地液化现象的回顾与土体液化可能性的评价准则[J]. 岩土力学, 2013, 34(10): 2737-2755,2795. (CHEN G X, JIN D D, CHANG X D, et al. Review of soil liquefaction characteristics during major earthquakes in recent twenty years and liquefaction susceptibility criteria for soils[J]. Rock and Soil Mechanics, 2013, 34(10): 2737-2755,2795. (in Chinese) doi: 10.16285/j.rsm.2013.10.005CHEN G X, JIN D D, CHANG X D, et al. Review of soil liquefaction characteristics during major earthquakes in recent twenty years and liquefaction susceptibility criteria for soils[J]. Rock and Soil Mechanics, 2013, 34（10）: 2737-2755,2795. (in Chinese) doi: 10.16285/j.rsm.2013.10.005 -
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