深中通道西岛斜坡段的软弱地基采用深层水泥搅拌桩处理方案，西岛斜坡段隧道槽底以下淤泥类土（含1层淤泥、2层淤泥、3层淤泥质土、2-4层粉砂）的厚度3～18m比港珠澳大桥沉管隧道的淤泥层厚，受采砂扰动影响，1层淤泥的原位十字板强度仅有4.3~8.4kPa，是一种流态的淤泥。E1管节基槽开挖线下方1层淤泥的最大厚度达5m。槽底的表层浮泥需要挖除，基槽两侧浮泥还需要阻挡其流入基槽，确保基槽能够成槽。同时西岛斜坡段位于采砂坑范围内，且从详勘和初勘的对比看，2015～2017年挖砂坑内的地层仍存在变化，必须考虑淤泥和采砂坑对DCM桩的布置形式的影响。", "ds_source": "
数据文件DCM现场原位试验各级荷载施加沉降分布试验结果及分析。设计了2组试验（A1组和A1组），通过四级加载和四级卸载，验证各级荷载施加沉降。", "ds_process_way": "
实验试验。", "ds_quality": "
数据质量良好。", "ds_acq_start_time": "2019-04-01 00:00:00", "ds_acq_end_time": "2019-05-31 00:00:00", "ds_acq_place": "西岛斜坡段", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 403681, "ds_files_count": 3, "ds_format": "pdf", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "e6924a72-2e38-46e4-a1e1-45ad603a31c6.png", "ds_thumb_from": 2, "ds_ref_way": "管维东，西岛斜坡段DCM现场原位试验数据集（2019年），国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn/)，2022，doi：10.12072/ncdc.nieer.db2818.2023", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "57a5e5a3-6fc5-43b5-a2ba-1f2ca54b7727", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.50" ], "quality_level": 3, "publish_time": "2023-06-13 15:43:08", "last_updated": "2023-07-01 02:10:08", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.NIEER.DB2818.2023", "i18n": { "en": { "title": "West Island Slope Section DCM in-situ test dataset (2019)", "ds_format": "", "ds_source": "
\n& emsp; This data is the result of DCM in-situ test of settlement distribution under various loads.", "ds_quality": "
\n& emsp; The data quality is good.", "ds_ref_way": "", "ds_abstract": "
\n& emsp; The soft foundation of the west island slope section of the deep and medium channel is treated with deep cement mixing piles. The thickness of the mucky soil (including 1 layer of silt, 2 layers of silt, 3 layers of mucky soil and 2-4 layers of silt) below the tunnel trough bottom of the west island slope section is 3-18m thicker than that of the immersed tube tunnel of the Hong Kong Zhuhai Macao Bridge. Affected by sand mining disturbance, the strength of the original vane of the first layer of silt is only 4.3~8.4kPa, which is a kind of fluid sludge. The maximum thickness of 1 layer of silt below the excavation line of E1 pipe joint foundation trench is 5m. The surface mud at the bottom of the trench needs to be removed, and the mud at both sides of the foundation trench also needs to prevent it from flowing into the foundation trench to ensure that the foundation trench can be formed. At the same time, the slope section of the West Island is located within the scope of the sand excavation pit. From the comparison between the detailed survey and the preliminary survey, the stratum in the sand excavation pit is still changing from 2015 to 2017. The influence of sludge and sand excavation pit on the layout of DCM piles must be considered.
", "ds_time_res": "日", "ds_acq_place": "West Island Slope Section", "ds_space_res": "", "ds_projection": "", "ds_process_way": "\n& emsp; Experimental test.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "DCM", "载荷试验", "沉降" ], "ds_subject_tags": [ "地质学" ], "ds_class_tags": [], "ds_locus_tags": [ "中山" ], "ds_time_tags": [ 2019 ], "ds_contributors": [ { "true_name": "管维东", "email": "780382843@qq.com", "work_for": "中交公路长大桥建设国家工程研究中心有限公司", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "管维东", "email": "780382843@qq.com", "work_for": "中交公路长大桥建设国家工程研究中心有限公司", "country": "中国" } ], "ds_managers": [ { "true_name": "管维东", "email": "780382843@qq.com", "work_for": "中交公路长大桥建设国家工程研究中心有限公司", "country": "中国" } ], "category": "冻土" }