To solve a problem wherein a partition wall such as a median strip cannot absorb impact at the collision of a vehicle and damage by the collision cannot be easily repaired at an early stage.

An elastic column body 6 formed by arranging a plurality of bendable elastic wires 7 vertically and hardening the upper and lower ends integrally by a consolidating material, is secured by fittingly inserting its upper end into a fittingly inserting hole 3 of a concrete block 1 and fittingly inserting its lower end into a hole 11 formed in a base course, and a plurality of elastic column bodies 6 are continuously arranged. A friction adjusting bolt 9 fixed to the upper side solidified part of the elastic column body 6 penetrates the concrete block 1, and a nut 13 is screwed with it. Continuous connection holes 5 are formed in a plurality of concrete blocks 1, and wires 14 are passed through and anchored to integrate the concrete blocks 1.