2results about How to "Effective avoidance" patented technology

This utility model belongs to the field of underground working well construction technology, specifically relating to a shotcrete drill bit and a composite pile formed by rotary drilling using this drill bit. The shotcrete drill bit includes a drill rod, a spiral blade disposed at the bottom of the drill rod, shotcrete blades disposed on the drill rod body, and a shotcrete head disposed on the shotcrete blades. The shotcrete blades are curved structures that bend backward in the middle. The shotcrete head is disposed at the leading edge of the bend of the shotcrete blades. The shotcrete blades are provided with a shotcrete channel connecting the shotcrete head and the internal channel of the drill rod. The shotcrete drill bit of this utility model can form a hollow cement mixing pile by rotary drilling and simultaneously shotcreting grout into the outer part of the formed hole using the shotcrete head. This not only simplifies the construction process but also reduces the amount of cement used.

The embodiment of the invention relates to the technical field of vehicles, and discloses a vehicle rear-end collision prevention method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring multi-sensor data, extracting a key feature array based on the multi-sensor data, calculating a spatial quality score according to the key feature array and a preset weight array, and judging a rear-end collision prevention level according to the spatial quality score and a score threshold array; and after a vehicle braking control strategy and a segmented avoidance strategy are determined at least according to the rear-end collision prevention level, corresponding strategy execution is completed. According to the embodiment of the invention, the method can at least dynamically evaluate the quality of the space where the vehicle is located, and facilitates the effective avoidance of the vehicle in a space-limited area. In addition, through the segmented avoidance strategy, the risk of secondary collision can be reduced while the probability of primary collision is reduced, and the personal and property safety of the user can be guaranteed.