CAJ | 학술논문

为研究悬臂式围护桩结构的受力性状和土压力分布特点，结合西宁火车站改造工程，对该深基坑支护结构在不同开挖工况条件下，悬臂桩的受力性状与内力传递特征进行动态的现场试验。试验结果表明：悬臂桩的受力特征与理论值有所差异，在实际设计中，可对其在配筋方式、混凝土设计、嵌固段长度等方面进行优化，实测土压力小于朗肯土压力，与经典土压力理论有显著区别。该试验结果可以有效优化桩身设计，为软岩基坑支护结构在开挖过程中的受力及变形提供理参考性依据。
위연구현비식위호장결구적수력성상화토압력분포특점，결합서저화차참개조공정，대해심기갱지호결구재불동개알공황조건하，현비장적수력성상여내력전체특정진행동태적현장시험。시험결과표명：현비장적수력특정여이론치유소차이，재실제설계중，가대기재배근방식、혼응토설계、감고단장도등방면진행우화，실측토압력소우랑긍토압력，여경전토압력이론유현저구별。해시험결과가이유효우화장신설계，위연암기갱지호결구재개알과정중적수력급변형제공리삼고성의거。
This paper aims to study the development and distribution features of the force and earth pressure of cantilever fender pile. Data used in this paper are obtained from the field experiment on the construction site of Xining railway station; and an analysis is carried out on the basis of these data. The behavior of cantilever fender pile under different excavations and the development of internal force are presented. Experimental data obtained from the field test are different from the theoretical values, so it is necessary and feasible to adjust and optimize the reinforcement, concrete design and embedment depth. Strategies for optimization are put forward. The experimental earth pressure is less than the Rankine pressure of the classical earth pressure theory. Results of this paper can effectively optimize the pile design, and can also provide monitoring and controlling for the force and deformation of supporting structure in soft rock pit excavation.