:p I would like to know if there is any civil engineering site where I can put my qustions and get answers. From Google search where ever I go , I get address of site which will open only if I pay up.
Are there any free sites where I can get some answers.

Most sites that provide paid and/or professional experts that answer questions often require payment. And many professional sites, similar to those of lawyers that develop a vast group of research, require payments to help pay for their investment.