特殊结构裂缝预防和控制措施分析——以龙湖岛站工程为例
Analysis of Prevention and Control Measures for Cracks in Special Structures—A Case Study of Longhu Island Station Project

针对地下空间结构形式复杂且构件厚重而带来的施工质量控制难题也越来越多，如何采取有效措施对裂缝进行预防和控制，从而来保证结构使用功能以及使用寿命，是长期困扰施工的关键性技术难题。本文结合工程实例，对施工过程中所采取的裂缝预防和控制措施(跳仓法施工、科学降水和沉降监测等)效果进行了探讨；对后期产生的主体结构裂缝进行了检测，并对结构裂缝产生的原因进行分析。结果表明：在采取相应裂缝预防和控制措施情况下，结构裂缝主要受季节性温度影响且与基坑围护结构形式有关。对于采用抗拔桩的地铁车站，当结构形状不规则时，尽量避免采用大放坡的围护结构形式。
There are more and more construction quality control problems caused by the complex structure of underground space and heavy components. How to take effective measures to prevent and control cracks so as to ensure the function and service life of the structure is a technology that has plagued construction for a long time problem. Based on engineering examples, this paper discusses the effects of crack prevention and control measures (jumping warehouse method construction, scientific precipitation and settlement monitoring, etc.) taken during the construction process, detects the main structural cracks that occur in the later period, and analyzes the structural cracks causes. The results show that, when corresponding crack prevention and control measures are taken, structural cracks are mainly affected by seasonal temperature and are related to the form of the foundation pit enclosure structure. For subway stations with uplift piles, when the structure shape is irregular, the enclosure structure with large slope should be avoided as far as possible.