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路基坡面防护
路基坡面防护设施与施工
目 录 1.干砌片石坡面防护 ·······················································1 2.骨架护坡 ·····························································1 3.浆砌片石护坡、护墙 ···················································1 4.种草籽防护 ··························································2 4.1 铺草皮、种草籽 ···················································2 4.2 铺草皮 ·············································
铁路路基坡面防护的方式及施工要求
3.3.2.路基支挡结构的施工要求 a.在岩体破碎、土质松软或有水地段修建支挡结构，宜在旱季施工，并应集中力量，分段施 工，不应长段拉开挖基。 b.浆砌片石砌体必须选用质地坚硬、不易风化、无裂纹、无水锈的片石，其母岩强度等级应 ≥MU30;各类石料最小块径应大于 15cm。片石应采用挤浆法砌筑 i严禁使用灌浆法工片石砌 筑施工时，砌块应大面朝下，丁顺相间，上下错缝，严禁砌成水平通缝或斜通缝，禁止出现 空缝。 c.支挡结构施工前，应在上方作好截、排水及防渗设施；雨期施工宜搭设雨棚。 d.明挖基坑应符合下列规定： ①应核对地质情况，当与设计不符时应及时反馈。 ②坑内有积水应设排水沟、集水井排水。 ③墙基位于斜坡时，墙趾埋入深度和距地面水平距离均应符合设计要求。 ④采用倾斜基底时，应准确挖、凿，不得填补。 ⑤基坑开挖至设计高程后， 应立即进行基底承载力检查； 当承载力不足时， 应按规定变更设 计