New theory in the front of theoretical basis research of molecular thermodynamics 4: on molecular structure of organic compound and theoretical equation of critical pressure;

Prediction of the critical pressures of alkanes using a quantitative structure property relationship;

The critical pressure of two spans beams with one end fixed and the other hinge joined;

The curvature formula of tiny curved rod,together with the vector method of area,is applied to inference for Euler formula about critical load of slender compressive rod which one end is fixed and another is free.

And then,the equations are applied to inference for Euler formula about critical load of slender compressive rod with common constraints.

In elastic mechanics, it is common practice to calculate critical loads in buckle of thin plates by means of double triangle series.

Penetration radius and grouting pressure in fracture grouting;

Study the influence of the proportion of grout and grouting pressure to the.

According to the test results of grouting to mitigate subsidence, the variation law of grouting pressure during grouting is analyzed, including stage of pressure quickly reducing, the pressure burdening stage and the stage of pressure gradually increasing.

Discussion of the Pressure Grouting technology in the Mining-Collapse-Area Control of Road Engineer;

The ways of pressure grouting treatments the quality accident of the pile foundation;

The application of chemical pressure grouting in soft soil foundation treatment;

The pressure casting application in an express highway formation disease treating

The paper mainly states the treatment methods and effects of adopting pressure casting technique to stop the seepage of the water supply structure.