郑刚^1,2, 张天奇^1,2, 张扶正^1,2, 查万理^1,2, 程雪松^1,2
AuthorsHTML:郑刚^1,2, 张天奇^1,2, 张扶正^1,2, 查万理^1,2, 程雪松^1,2
AuthorsListE:Zheng Gang^1,2, Zhang Tianqi^1,2, Zhang Fuzheng^1,2, Zha Wanli^1,2, Cheng Xuesong^1,2
AuthorsHTMLE:Zheng Gang^1,2, Zhang Tianqi^1,2, Zhang Fuzheng^1,2, Zha Wanli^1,2, Cheng Xuesong^1,2
Unit:1. 天津大学建筑工程学院，天津 300072；2. 滨海土木工程结构与安全教育部重点实验室(天津大学)，天津 300072
Unit_EngLish:1．School of Civil Engineering, Tianjin University, Tianjin 300072, China
2．Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin 300072, China
Abstract_Chinese:采用二维隧道模型试验, 探究砂土中不同埋深下盾构隧道开挖及补偿注浆对地表沉降变化的影响规律. 试验表明, 对于不同埋深的工况, 盾构隧道开挖引起的地表沉降均可以用Peck公式有效预测, 埋深C/D对地表沉降槽形状具有显著影响, 且沉降最大值与土体损失率基本呈线性关系. 正常体积范围补偿注浆时, 随着埋深增加, 地表最大抬升值不断减小, 地表抬升范围逐渐增加. 当补偿注浆体积达到某一值后, 不同埋深工况地表最大抬升值与土体补偿率基本均呈线性关系．超体积补偿注浆时, 超体积补偿注浆引起的地表最大抬升值与土体补偿率继续保持线性关系．随着土体补偿率的提升, 不同埋深导致的地表抬升范围差异逐渐减小.
Abstract_English:Two-dimensional model tests were performed in sand to investigate the influence of shield tunneling and compensation grouting on surface settlement. The test results indicated that surface settlement caused by tunneling under different cover depths can be effectively predicted by Peck formula. The shape of settlement trough was found to be dependent on the cover-to-diameter ratio C/D，and the maximum settlement was approximately proportional to volume loss. When take compensation grouting in normal volume range, the maximum upheaval and upheaved scope of the ground surface were found to decrease and increase with cover depth, respectively. When the compensation grouting volume reached a certain value, the maximum surface upheaval under different cover depths showed a roughly linear relationship with the compensation grouting volume. While take compensation grouting in additional volume range, the maximum surface upheaval kept the linear relationship with the compensation grouting volume. Nevertheless，the difference of upheaved scope caused by different cover depths gradually vanished with the increase of compensation grouting volume.
Keyword_Chinese:模型试验; 砂土; 盾构隧道; 补偿注浆; 埋深; 地表沉降; 抬升
Keywords_English:model test; sand; shield tunnel; compensation grouting; cover depth; surface settlement; upheaval

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