求翻译：在开挖及初喷混凝土后及时安装。钢拱架与初喷混凝土面的间隙必须用喷射混凝土充填密实。间隙过大时，可用钢模板或混凝土楔块顶紧，其点数单侧不准少于8个。喷射混凝土应由两侧拱脚向上对称喷射，并将钢架覆盖。是什么意思？

Early in the excavation and the timely installation of shotcrete. Steel arch and the first surface of the shotcrete sprayed concrete filling the gap must be dense. Gap is too large, steel formwork or concrete wedge can be the top tight, its unilateral allowed less than eight points. Shotcrete should

In the excavations and early post-sprayed concrete and timely installation. Steel arch structure sprayed concrete surface with early gap must be filled with shotcrete compacting. When excessive margins available steel formwork or concrete block top, tight wedge their points on either side will be al

After excavates and initially spurts the concrete the prompt installment.The steel centering with initially spurts the coagulation soil surfaced road the gap to have to use the shotcrete backfill to be dense.When gap oversized, the available steel template or the concrete voussoir go against tightly

At the beginning of excavation and sprayed concrete in time after installation. Steel arch centering and first jet concrete in shotcrete surface gaps must be filled-compacting. Clearance is too large, steel or concrete wedged tight, its single side no less than 8 points. Sprayed concrete should be s

After excavates and initially spurts the concrete the prompt installment.The steel centering with initially spurts the coagulation soil surfaced road the gap to have to use the shotcrete backfill to be dense.When gap oversized, the available steel template or the concrete voussoir go against tightly