| 摘要 |
A retaining wall block ( 1 ) has parallel top and bottom faces ( 2, 3 ), a front face ( 4 ), a rear face ( 5 ), first and second side wall faces ( 6, 7 ) and a vertical plane of symmetry (S) extending between the front and rear faces ( 4, 5 ). The block ( 1 ) is formed as a body portion ( 8 ) including the front face ( 4 ), a head portion ( 9 ) including the rear face ( 5 ) and a neck portion ( 10 ) connecting the body portion ( 8 ) and the head portion ( 9 ). The body, head and neck portions ( 8, 9, 10 ) each extend between the top and bottom faces ( 2, 3 ) and between the first and second side wall faces ( 6, 7 ). An opening ( 13 )' extends through the neck portion ( 10 ) from the top face ( 2 ) to the bottom face ( 3 ), dividing the neck portion ( 10 ) into first and second neck wall members ( 14, 15 ) extending rearwardly from the body portion ( 8 ) to the head portion ( 9 ). First and second pin holes ( 16 and 17 ) are each disposed in the body portion ( 8 ) and open onto the top face ( 2 ) for receiving a pin ( 50, 51 ) with a free end of the pin protruding beyond the top face. First and second pin receiving cavities ( 18, 19 ) are each disposed in the body portion ( 8 ) and open onto the bottom face ( 3 ) for receiving the free end of a pin ( 50, 51 ) received in a pin hole ( 16 and 17 ) of an adjacent block ( 1 ) disposed therebeneath so as to interlock the blocks ( 1 ) with a predetermined setback. The neck wall members ( 14, 15 ), pin holes ( 16 and 17 ) and pin receiving cavities ( 18, 19 ) are positioned such that a first plane (P 1 ) extending parallel to the plane of symmetry ( 5 ) passes through the first pin receiving cavity ( 18 ), first pin hole ( 16 ) and first neck wall member ( 14 ) and a second plane (P 2 ) extending parallel to the plane of symmetry ( 5 ) passes through the second pin receiving cavity ( 19 ), second pin hole ( 17 ) and second neck wall member ( 15 ).
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