SETTLEMENT OF COMPOSITE FOUNDATION – A CASE HISTORY WITH REINFORCEMENT OF STEEL PIPE MICRO-PILE
Journal Title: Topics in Civil, Environmental & Building Engineering (TICEBE) - Year 2017, Vol 1, Issue 2
Abstract
This paper presents a case history of high-rise building that is located in deep alluvium deposits with composite foundation. When the building construction approached completion, the monitoring data showed that the foundation settlement and the latest settlement rate was approaching or far more exceeding the control values. Foundation reanalysis demonstrated that even though the foundation capacities could satisfy the design requirement, the total final settlement would be more than 200mm due to the thick compressible soils, which couldn’t meet the designed settlement requirement. To guarantee the building security, steel pipe micro-pile as settlement reducer was utilized for its clean construction environment to control post-settlement. The total 624 micro-pile of 18 meter long and 30mm in diameter had been pressed tipping into fine sand layer within 50 days. During and after micro-pile construction, settlement monitoring was carried out by the settlement remarks installed at the columns. The monitoring data demonstrated that during the reinforcement construction the building steadily settled down due to construction disturbance and the differential settlement almost could be negligible. Six months later the settlement tended to convergence and the settlement rate had satisfied the relevant code standard. The method of foundation reinforcement is feasible and successful.
Authors and Affiliations
Jianping Sun, Junhua Xiao, Qingpeng Wang
Keywords
Related Articles
- EP ID EP410938
- DOI 10.26480/iceti.01.2017.109.112
- Views 61
- Downloads 0
NUMERICAL SIMULATION ANALYSIS ABOUT THE EXPLOSION PROPAGATION PROCESS OF PIPELINE GAS ON THE EFFECT OF COMPLEX OBSTACLES
Natural gas explosion seriously endanger social stability and public life property safety, study the pipeline gas explosion is high importance of the safety enterprise production and social stability. Through the theoret...
HAZARDS OF HAZE
Haze days in China has occurred frequently in recent years. Severe haze has become the focus of environmental governance. The impact of haze to human beings involves in many aspects, and it not only affects the ecologica...
MEASUREMENT OF MOLTEN POOL TEMPERATURE FIELD IN TWIN-ROLL CASTING OF THIN STRIP STEEL
To measure the temperature distribution of molten pool in twin-roll strip casting, a new method based on the soft measurement of temperature field and on-line measurement of fixed point temperature was presented. A three...
SCATTERING OF COMPLEX DEFECTS NEAR BIMATERIALS INTERFACE BY INCIDENT SH-WAVES
The methods of conformal mapping and Green’s function are developed to report interaction of complex defects (an elliptical cavity and a crack) near bimaterials interface under incident SH waves. Firstly, the bimaterials...
MULTI-PARAMETER CUSTOM CRITICAL DEFECT EVALUATION METHOD OF ULTRASONIC TESTING METHOD
For several situations encountered in the detection, more complex internal structure, or testing data of smaller discreteness, data is less or more close, which is difficult to meet the conditions of use, that is concret...