鋼筋混凝土結構物施工完成後，常因混凝土自身或外部因素產生局部損壞，因此需要進行維修補強。結構物之修復補強工法種類繁多，本研究主要探討植筋工法之基本原理及植筋拉拔特性。 本研究採不同植筋膠、依不同植筋深度、不同鑽孔形式、應用各種維修材料，針對不同齡期之室溫及乾濕冷熱循環，進行鋼筋之拉拔試驗及植筋膠與混凝土粘結力之劈張試驗，試驗結果顯示，植筋較鋼筋預埋於混凝土有較高拉拔力。植筋深度越深可得較佳之抗拉力，但植筋深度太深時，除經濟上之考量外，對強度的提升也屬有限。當混凝土底材之強度較高時，鋼筋之抗拉能力相對較高，但底材強度高低將不會影響其拉拔後之破壞模式。此外，植筋深度較淺時(4 cm)，破壞方式由混凝土強度控制；植入深度較深時(6 cm或8 cm)，破壞方式由植筋膠及鋼筋來控制。經本研究結果顯示，鋼筋埋入樹脂系維修材料之拉拔力遠高於水泥系之維修材料。鋼筋或纖維棒能與維修材料或植筋膠緊密結合，主要是透過表面的幾何凹凸節理，來達成穩固的鑲崁與楔合作用。對於植筋膠與混凝土粘結力之劈張試驗結果顯示，在進行植筋膠操作及養護時，宜採用低溫下施工其粘結力普遍較高溫施工為佳。 After is build of Structure of reinforced concrete is finished, it is usually damaged partial due to concrete itself or other factors. So, must to repair. However the structure of many repairs method. This study main to explore the anchor basic theorem and the anchor pull out of characteristic. This study to select different anchor gel, anchor length, anchor hole form, repair material. For different of age, that inside temperate and dry-wet circling. To proceed anchoring pull out test, and splitting tensile test by anchor gel and concrete bond force. Test result shows pull out test of pullout load, for that rebar anchor to concrete more than enter to concrete. Anchor length more deep, to obtain more than pullout load. When concrete more than strength, more than pullout load. Anchor length not deep (4 cm), modes of failure by concrete strength to control, When anchor deep (6 cm or 8 cm), modes of failure because anchor gel and rebar strength to control. Rebar to enter repair material of pull out fore more than of cement repair material. Rebar by surface bamboo joints to bond of anchor gel and repair material. Splitting test of result to show, anchoring to use low temperature more than bond.
