| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for accurately laminating mutual junction pits rapidly without conducting each correcting holding work of the vertically connected joining sections of the concrete junction pits. SOLUTION: The outer circumferential surface 2a of an interior wall 2 is stuck fast on the interior-wall surfaces 1a of the concrete junction pits 1, and an H-shaped sectional resin-concrete annular connecting frame 4 forming mortar- filling spaces S between an exterior wall 3 and the exterior-wall surfaces 1b of the concrete junction pits 1 is constituted. The connecting end sections of the junction pits 1 are fitted into fitting grooves 4a, 4b formed in the vertical opposed direction of the annular connecting frame 4, the insides of the mortar filling spaces S are filled with mortar and mortar is solidified, and the junction pits 1 are connected vertically.
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