Research methods: Its interior stress characteristics and distributional rule of extra stress are studied by three dimension numerical simulation in this paper ,and consummate the structure design. More ever its reasonability and validity in engineering are validated by field tests.
Research results: Numerical simulation condition is simple，and the stress characteristics and distributional rule of extra stress in planks are definitude. The structure design will be consummated with it. More ever by field test , the reasonability of structure and compressive strength of planks are availability with extra stress，and it can supply action of anchor works in time.
Research conclusions: Cross superposition planks is a new type of pressed structures in anchor engineering. It has some advantages，namely prefabricated，conveyed and assembled conveniently，shorter time limit for a project , cheaper cost ,etc. and it has the application value.
2007, Vol. 24 
