The paper puts forwards equal strength design on node of unequal strength concrete between beam and column to pour the node and the beam simultaneously with equal-strength concrete by adopting the theory of improvement in representative strength of concrete,in combination with the concept of required concrete strength of the column,and with axis-pressure ratio limit and approach to node construction.

The main contents and the features of the three professional or local standards for the quality tests of foundation piles by the method of drilling are comparatively introduced. The problems such as the testing processes,the drilling depth of the bearing stratum,the determination method for the representative strength values of the concrete of piles and the reasonable definition of the allowable values of the pile concrete at the breakdown section are discussed,and the suggestions for corrections are presented.

The division of both these rock types into sub-types corresponding to various petrogenetic stages permits the definition of more representative strength and deformation characteristics.

The main contents and the features of the three professional or local standards for the quality tests of foundation piles by the method of drilling are comparatively introduced.The problems such as the testing processes,the drilling depth of the bearing stratum,the determination method for the representative strength values of the concrete of piles and the reasonable definition of the allowable values of the pile concrete at the breakdown section are discussed,and the suggestions for corrections are presented....

The main contents and the features of the three professional or local standards for the quality tests of foundation piles by the method of drilling are comparatively introduced.The problems such as the testing processes,the drilling depth of the bearing stratum,the determination method for the representative strength values of the concrete of piles and the reasonable definition of the allowable values of the pile concrete at the breakdown section are discussed,and the suggestions for corrections are presented.

Preestimate the intensity of rock-soil aggregate mixture quickly and accurately is not only helpful to design and calculate, but also to establish the construction scheme and choose properly compaction method, while the rock-soil aggregate mixture are broadly used in roadbeds, dykes and dams, and foundation engineering. The physico-mechanical character of the mixture are essentially determinated by the granule property of the mixture and the interior frame of the mixture, but the classification existed are always...

Preestimate the intensity of rock-soil aggregate mixture quickly and accurately is not only helpful to design and calculate, but also to establish the construction scheme and choose properly compaction method, while the rock-soil aggregate mixture are broadly used in roadbeds, dykes and dams, and foundation engineering. The physico-mechanical character of the mixture are essentially determinated by the granule property of the mixture and the interior frame of the mixture, but the classification existed are always set about from the grain composition, it is hardly to predict the character of the mixture from the classification. Aimed at the engineering application, studied the classification method of the mixture supported by the results of lab shear test and compaction test, and utilized the nonlinear theory of fractal geometry, this article assorted the mixture into 3 levels and 24 kinds according to the property of rock and soil, the ratio of rock to soil and the granularity distribution fraction dimension of the mixture, to present the diversity on characters of different kinds of mixtures meanwhile. This synthetical classification method is prone to apply in practice for the criterion of this method is simple and it can be determined conveniently; and the representative strength of different kinds of mixtures could be quickly predict through this classification method.

>=It is rather inconvenient to pour intensive concrete into the node of strength concrete column or ordinary concrete beam.The paper puts forwards equal strength design on node of unequal strength concrete between beam and column to pour the node and the beam simultaneously with equal-strength concrete by adopting the theory of improvement in representative strength of concrete,in combination with the concept of required concrete strength of the column,and with axis-pressure ratio limit and approach...

>=It is rather inconvenient to pour intensive concrete into the node of strength concrete column or ordinary concrete beam.The paper puts forwards equal strength design on node of unequal strength concrete between beam and column to pour the node and the beam simultaneously with equal-strength concrete by adopting the theory of improvement in representative strength of concrete,in combination with the concept of required concrete strength of the column,and with axis-pressure ratio limit and approach to node construction.