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The invention provides a stone-clamping preventing tyre, and relates to a tyre. The tyre comprises a tyre body and tyre surface patterns; first main channels in the shape of ring and second main annular channels in the shape of wave type ring are respectively arranged on two sides of the tyre surface patterns along a centre line; a central pattern block is formed between two first main channels; a plurality of side pattern blocks which are uniformly distributed along the tyre surface are formed between the two main channels at the same side; a plurality of tyre shoulder pattern blocks which are uniformly distributed along the tyre surface are respectively arranged outside the two main channels; two adjacent side pattern blocks are separated through an obliquely arranged side pattern channel; two ends of each side pattern channel are communicated with the two main channels, and reversely expanded to form triangular stone removing areas; and the two triangular stone removing areas are respectively matched with the two main channels to form large triangular areas for removing the stones in the two main channels. According to the stone-clamping preventing tyre provided by the invention, the basic performances such as pulling, draining and wear resisting are ensured under the condition that the designs of the bottoms of the channels are unchanged; and moreover, the stone-clamping preventing performance of the tyre can be improved.

The invention discloses a flashing formwork. The flashing formwork comprises two formwork pieces arranged oppositely, a first baffle and a second baffle; a first open groove is formed in the first baffle; a second open groove is formed in the second baffle; the first baffle and the second baffle are fixed to the same ends of the two formwork pieces, and the first open groove and the second open groove are staggered to form a through hole; and the through hole is used for allowing reinforcing steel bars to penetrate through to be arranged between the two formwork pieces. According to the flashing formwork, the first baffle and the second baffle which are crossed with each other are fixed to the two ends of the two formwork pieces, and the reinforcing steel bars extend out of the hole in theoverlapping position of the first open groove and the second open groove, therefore, under the conditions that the first baffle and the second baffle are fixed to the formwork pieces and concrete isprevented from leaking, the reinforcing steel bars can also extend out of the first baffle and the second baffle.