在城镇道路两侧的人行道、休闲广场区域,种植树木是最常见的景观设计。不过,该区域的树坑却存在一个至今仍未得到有效解决的技术难题:树坑面积不能过大,周边路基又需压实,为路表面结构材料提供强度支撑;随着时间的延续,树木生长变粗,树根茎也会生长进入到周边路基土壤内,导致路基发生向上突起的“膨胀”变形,并造成树坑周边区域硬化路面材 On the sidewalks and leisure squares on both sides of town roads, planting trees is the most common landscape design. However, there are still some technical problems in tree pits in the area that have not yet been solved effectively: the area of ​​tree pits can not be too large, and the surrounding subgrade needs to be compacted so as to provide strength support for road surface structural materials; as time goes by, trees Grow thick, the roots will grow into the soil into the surrounding roadbed, leading to the embankment uplift of the “bulging” deformation, and cause the area around the pit hardening road surface material