中南大学学报（自然科学版）2026，Vol.57Issue(2)：815-830,16.DOI:10.11817/j.issn.1672-7207.2026.02.026
局部高水头地段盾构管片受力特征及限压排水对策研究
Research on the force characteristics of shield tube sheet in local high head area and countermeasures of pressure-limiting drainage
摘要
Abstract
Shield tunnels are prone to segmental structural damage under high water pressure when traversing complex geological conditions such as water-rich deep overburden and fault fracture zones.This study,based on a shield tunnel section of an intercity railway project in Shenzhen,water pressure monitoring on the outer surface of the segments at six typical cross-sections was conducted.The variation characteristics of external water pressure and structural damage under locally high hydraulic head conditions were analyzed.Numerical simulations were employed to investigate a pressure-limiting drainage scheme using perforated segments,and design parameters for this system were proposed.The results indicate that the external water pressure on the segments is closely correlated with burial depth and geological structures.Segment cracking and leakage are observed at the crown under high local water pressure,with a maximum recorded pressure of 0.98 MPa at the deepest section.After implementing pressure-limiting drainage with perforated segments,a noticeable"pressure-reduction funnel"develops in the surrounding rock seepage field,significantly reducing the external water pressure and optimizing the distribution of axial force and bending moment in the segments,thereby enhancing structural safety.To balance pressure reduction and structural integrity,a pressure-limiting threshold of 0.3 MPa is recommended.Considering the project characteristics and the structure of perforated segments,the following optimal drainage design parameters are proposed:a drainage pipe length of 2.0 m,aperture diameter of 8 cm,and longitudinal spacing of 7.2 m.These findings provide effective guidance for the subsequent design and construction phases of similar tunnel engineering projects.关键词
盾构隧道/高水头/泄水孔式管片/限压排水/数值模拟Key words
shield tunnel/high hydraulic head/perforated segment/pressure-limiting drainage/numerical simulation分类
建筑与水利引用本文复制引用
谭有材,阳军生,方星桦,杨喜锋,杨国富,王振华..局部高水头地段盾构管片受力特征及限压排水对策研究[J].中南大学学报（自然科学版）,2026,57(2):815-830,16.基金项目
国家自然科学基金资助项目(52378422) （52378422）
湖南省自然科学基金资助项目(2025JJ60272)(Project(52378422)supported by the National Natural Science Foundation of China （2025JJ60272）
Project(2025JJ60272)supported by the National Natural Science Foundation of Hunan Province) （2025JJ60272）
