The Settlement Analysis And Control Of The Underpinning Engineering Of Kaifeng Jade Emperor Pavilion

China is a country with an ancient civilization and long history. During the long years, the Chinese nation has created a rich and precious heritage of ancient buildings. As the history and geographical conditions have changed, a considerable part of the ancient building has several meters below the existing surroundings, some even immersion in water, which is a serious threat to the existence of old buildings. How to overall uplift of the building above the existing ground is an important topic in ancient building conservation area at present.The key technologies of uplift ancient buildings is underpinning and the preferred method of underpinning is manual pipe-jacking. Because the soil solum disturbing in pipe-jacking construction is the primary reason of soil mass deformation and ground settlement, which masonry ancient buildings are sensitive to. Settlement control is crucial in pipe-jacking engineering design and construction.This paper is based on the underpinning engineering of Kaifeng Jade Emperor Pavilion. Through in-situ measure and theory analysis, discuss the settlement mechanism, regularity and control measures in this construction. All these will offer reference to design and construction of other similar projects. The main content is as follows:1. Briefly introduce the background of overall uplift engineer of Kaifeng Jade Emperor Pavilion, including the history of the building, structurl features, damage condition. Besides, analyse and assess the design of the underpinning engineering with the core of the manual pipe-jacking technique.2. Combined with the practical construction character of engineering and based on the former research. The variation of soil stress state due to being disturbed, the mechanism and causation of settlement during underpinning engineering are discussed. And make a concrete analysis of construction disturbance and Stratum loss. Conclude different zones of disturbed soil and the regularity of the ground settlement which are more accorded with fact. Finally some control measures are advanced.3. Through in-situ measured settlement data, draw the settlement curve. And compare the observational results to the regularity of theoretical analysis, which confirmed the correctness of the theoretical analysis and its prediction function in engineering.The results of the thesis not only have the steering effects on overall uplift engineer of Kaifeng Jade Emperor Pavilion, but also have an important reference value in similar ancient building conservation engineering.