Firstly, the general longitudinal strength is calculated with the "hull girder" theory of a large semi-submergible deck barge (Zhongren 1602) whose carrying capacity is 15000 tons with one super large caisson(l 1351.53 tons) loading on it.

The International Symposium on Deepwater Mooring System(Concepts,Design,Analysis and Material),which was held in Houston,USA from October 2 to 3,2003,is briefly introduced in this paper. The discussion emphases are put on the mooring system of the spar mooring system,suction caisson anchor and synthetic mooring lines. The theoretical calculation and numerical simulation of hydrodynamic characteristics of moored large-scale floating structures and some problems related to the design of a mooring system are summarized.

In the case of the semisubmersible drilling platform with caissons and the jack-up drilling platform,the stability cross curves are calculated at every 15° ranging from 0° to 180° in the direction of x axis.

对沉箱型半潜式平台和自升式平台,在 x 轴方向上0°至180°范围内,每隔15°计算一组稳性交叉曲线。

Water stops were used in caissons forming the dock walls and the caissons were of special structural shapes with various types, resulting in complicated technological process and sequence of work.

To overcome such a situation, adequate technical measures were taken and the prefabrication of the caissons was completed with good quality and sufficient quantity.

The paper uses FEM to calculate the structural strength of a 15 000 DWT deck barge carrying 4 large concrete boxes in the loading, transporting and submerging cases.

People who work under hyperbaric pressure, e.g., in a caisson for general construction under water, and scuba divers are exposed to certain risks.

In the range of pH 6.3-7.6, the oversouring of blood mainly influences the critical shear stress, and the Caisson viscosity depends only weakly on the acid-base equilibrium.

Vibrating-uplift rocking motion of caisson breakwaters under various breaking wave impact forces

Overturning is one of principal failure types of caisson breakwaters and is an essential content of stability examination in caisson breakwater design.

The mass-springdashpot model of caisson-foundation system is used to simulate the vibrating-uplift rocking motion of caisson under various types of breaking wave impact forces,i.

Prediction of uplift capacity of suction caissons using a neuro-genetic network

Suction caissons are frequently used for the anchorage of large offshore structures.

The uplift capacity of the suction caissons is a critical issue that needs to be predicted reliably.

The performance of the neuro-genetic model has been studied in detail over specific data sets pertaining to suction caissons, gathered from 12 independent studies [49] and compared with the predictions made by NN and finite element method models.

Use of a vibrating sleeve for sinking large caissons into the ground

The main differences of stability analysis between the mobile drilling units and normal ships are described in the present paper.The mathematical models,cal- culation methods and principles of the stability cross curve for the semisubmersible drilling platforms with the hulls and caissons and jack-up drilling platform are presented.Based on this the computer program is formulated.Transverse,longitu- dinal and diagonal stability cross curves are calculated for the semisubmersible drilling platform with the lower...

The main differences of stability analysis between the mobile drilling units and normal ships are described in the present paper.The mathematical models,cal- culation methods and principles of the stability cross curve for the semisubmersible drilling platforms with the hulls and caissons and jack-up drilling platform are presented.Based on this the computer program is formulated.Transverse,longitu- dinal and diagonal stability cross curves are calculated for the semisubmersible drilling platform with the lower hulls.In the case of the semisubmersible drilling platform with caissons and the jack-up drilling platform,the stability cross curves are calculated at every 15° ranging from 0° to 180° in the direction of x axis.Two calculation examples are provided,and the calculating method is more convenient to follow,which may be applied to the engineering calculation,especially to preli- minary designs though it is found that the results are not so in agreement as is expected with hand calculations.

本文扼要地阐述了钻井平台与普通船型稳性分析的主要差别,提出了下浮体型、沉箱型半潜式钻井平台和自升式钻井平台稳性交叉曲线的计算数学模型、计算方法和原理。在此基础上建立了计算机程序。对下浮体型半潜式平台计算了横向、纵向和对角线方向三组稳性交叉曲线。对沉箱型半潜式平台和自升式平台,在 x 轴方向上0°至180°范围内,每隔15°计算一组稳性交叉曲线。提供了两个计算实例,虽然与手工计算相比稍有误差,但在工程计算上是适用的,特别可供初步方案设计之用。

Aceeording to the design of the dry dock (entrance width is 24m ) it was constracted with four separated reinforced concrete floating-caissons which were precasted in the caisson precasting yard, then were floated to the construction site on the sea, set on the foundation under water and fasted to be a dock, the junctions were filled with concrete casted in the water, The Construction method in water didn't need temporary cofferdam, shortened construction period, saved much investment and is an attempt to construct...

Aceeording to the design of the dry dock (entrance width is 24m ) it was constracted with four separated reinforced concrete floating-caissons which were precasted in the caisson precasting yard, then were floated to the construction site on the sea, set on the foundation under water and fasted to be a dock, the junctions were filled with concrete casted in the water, The Construction method in water didn't need temporary cofferdam, shortened construction period, saved much investment and is an attempt to construct dry dock in the sea

Water stops were used in caissons forming the dock walls and the caissons were of special structural shapes with various types, resulting in complicated technological process and sequence of work. To overcome such a situation, adequate technical measures were taken and the prefabrication of the caissons was completed with good quality and sufficient quantity.