This paper discussed the calculation problem of the buoyancy of water and the engineering anti-buoyancy,elaborated the relationship between whole anti-uplift and partial anti-uplift.

Discussion on the anti-floating design of underground constructions;

Design and application of the anti-floating anchor shaft in basement

This paper is to analyze the common technical measures of basement design from the view of construction documents audit,and anti-floating design,air-defense design and the energy conservation design are elaborated in detail.

Introduce the anti-buoyancy design key point for furnace pit structure,mainly discuss the confirmation of waterproof location,water reduction coefficient,sub-coefficient of load of water buoyancy.

On the basis of seriously studying and analyzing the construction design drawings the paper puts forward the approach to the side stability, bottom surge of foundation pit, anti-buoyancy of underground engineering as well as the safety and protective measures of the surrounding ancient buildings etc.

Combining a practical case,the technique of pressure dispersive anti-float anchor on experiment,design,construction and examination is studied.

The problems how to make theprotecting wall of foundation pit by which there is a building underground pipeline andhow to make water drop on the foundation anti-float in winter constution are solved in practice.

Problems are analyzed such as the subgrade bearing capacity, sedimentations and anti-float.

Precise calculation of buoyancy and its center for launching Jackets;

Model Test of Underground Structure Buoyancy;

Structures and Properties of Kapok Fiber and the Wettability and Buoyancy Characteristics of Kapok Fibrous Assemblies;