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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

42卷

期数:

2025年05期

页码:

200-208

栏目:

岩土工程

出版日期:

2025-09-30

文章信息/Info

Title:

Simulation analysis of fluctuation characteristics of underwater perfusion seal bottom of large diameter caisson

文章编号:

1673-2049(2025)05-0200-09

作者:

简文浩^1,2,师文豪^1,2,邓伟^1,3,王源^1,2,樊绿叶^2,4

(1. 苏州科技大学 土木工程学院,江苏 苏州 215011; 2. 昆山市地下空间技术研究院有限公司,江苏 苏州 215337;3. 中建国际建设有限公司,江苏 苏州 215000; 4. 昆山市建设工程质量检测中心有限公司,江苏 苏州 215337)

Author(s):

JIAN Wenhao^1,2, SHI Wenhao^1,2, DENG Wei^1,3, WANG Yuan^1,2, FAN Lyuye^2,4

(1. School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, Jiangsu, China; 2. Kunshan Underground Space Technology Research Institute Co., Ltd, Suzhou 215337, Jiangsu, China; 3. CSCEC International Construction Co., Ltd. Suzhou 215000, Jiangsu, China; 4. Kunshan Construction Engineering Quality Inspection Center Co., Ltd, Suzhou 215337, Jiangsu, China)

关键词:

大直径沉井;  封底层起伏特征;  数值模拟;  水下混凝土灌注

Keywords:

large diameter caisson;  fluctuation characteristic of seal bottom;  numerical simulation;  underwater concrete perfusion

分类号:

TU943

DOI:

10.19815/j.jace.2023.11063

文献标志码:

A

摘要:

为解决沉井水下灌注混凝土封底问题,依托昆山森林公园地下筒仓式停车库沉井工程,基于PFC离散元方法构建了沉井水下灌注混凝土数值模型,模拟了沉井水下灌注混凝土封底过程; 通过引入相对起伏度参数,量化分析了封底层的起伏特征,揭示了导管布置方案、地下水位高度、地下水温度等因素对封底层起伏特征的影响规律。结果表明:水下灌注过程中,通过逐步提升导管法模拟混凝土封底过程是可行的; 同等条件下,导管布置越密集,封底层相对起伏度越小,起伏特征越不明显; 地下水位越高,封底层起伏越大,水位越低,封底层越均匀; 工程允许范围内,适当降低地下水位有利于降低封底的相对起伏度; 地下水温度变化对封底层相对起伏度影响较小。

Abstract:

In order to address the problem of underwater concrete perfusion seal bottom of caisson, relying on the caisson project of underground silo parking garage in Kunshan Forest Park, a numerical model of underwater concrete perfusion of caisson was constructed based on the discrete element method of PFC, and the process of underwater concrete perfusion seal bottom of caisson was simulated. By introducing the relative fluctuation parameter, the fluctuation characteristics of seal bottom layer were quantitatively analyzed, and the influence laws of conduit arrangement scheme, height of groundwater table, and temperature of groundwater on the fluctuation characteristics of seal bottom layer were revealed. The results show that it is feasible to simulate the concrete bottoming process by gradually raising conduit method during underwater perfusion. Under the same condition, the denser the conduit arrangement is, the smaller the relative fluctuation of seal bottom layer is, and the less obvious the fluctuation characteristics are. The higher the groundwater table is, the greater the fluctuation of seal bottom layer is, the lower the water level is, and the more uniform the seal bottom layer is. Within the allowable scope of project, appropriately lowering the groundwater table is helpful to reduce the relative fluctuation of seal bottom. The change of groundwater temperature has a small influence on the relative fluctuation of seal bottom layer.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2023-11-19 投稿网址:http://jace.chd.edu.cn
基金项目:国家自然科学基金项目(42202306); 苏州市科技计划(基础研究)项目(SJC2023002); 江苏省自然科学基金项目(BK20200993)
通信作者:师文豪(1988-),男,工学博士,副教授,E-mail:shiwenhaoneu@126.com。
Author resume: SHI Wenhao(1988-), male, PhD, associate professor, E-mail: shiwenhaoneu@126.com.

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更新日期/Last Update: 2025-09-25