How to create a contact

Hello, I want to create a contact between a surface and a group of nodes that has gap of 1 mm. The suarface is a side of a concrete barrier and nodes are from ends of some descrete elements (springs) which represents the soil. I tried Automatic nodes_to_surface contact and Tiebreak nodes_to_surface contact types. But, they didn't work. Can someone help me with this matter? I am attaching an image from my model.