they are used to ensure the stability of sheet pile structures, to ensure the stability of slopes, rock walls and notches, to anch

anch anchor anchorage are block brick bundle buoyancy cement concrete construction cover deep dirt drill ensure fence fix fixing force formwork geological geology gray highway hole magnitude material notch notches nut permanent pile plastic pressure railroad retaining rig road rock rod rods root screwed sheet site slopes soil stability stone structures tensile tension they tunnel used wall walls