Foundation injection casing pipe and construction method: Fid-Bau Portal

Foundation injection casing pipe and construction method

YAO JINGYU

The invention discloses a foundation injection casing pipe. The foundation injection casing pipe comprises a grouting pipe and a casing pipe body, wherein connecting columns are fixedly arranged between the grouting pipe and the casing pipe body, the upper end of the grouting pipe and the upper end of the casing pipe body are equal in height, a grouting hole is formed in the side wall of the grouting pipe, and the grouting hole is lower than the lower end of the casing pipe body; limiting frames are detachably mounted between the grouting pipe and the casing pipe body, wherein the number of the limiting frames is equal to the number of the connecting columns, and the limiting frames are located at the upper end of the grouting pipe; and a plane perpendicular to the axis of the casing pipebody is a datum plane, projections of each group of connecting columns on the datum plane is overlapped, the projections of the limiting frames on the datum plane are located between the projections of the two adjacent connecting columns in the same group on the datum plane, and the shape of the two adjacent connecting columns in the same group on the datum plane is the same as the shape of the limiting frames. According to the method, when foundation injection is carried out, the casing pipe body and the grouting pipe can be pulled out at the same time, so that time is effectively saved whenfoundation injection is carried out, and meanwhile transportation is facilitated.

本发明涉及一种地基注入套管，包括注浆管和套管本体，注浆管和套管本体之间固定设有连接柱，注浆管和套管本体的上端高度相等，注浆管的侧壁上开设有注浆孔，且注浆孔低于套管本体的下端；在注浆管和套管本体之间可拆卸的安装有限位框，限位框的数量与连接柱的数量相等，且限位框位于注浆管的上端处；垂直于套管本体轴线的平面为基准面，各组连接柱在基准面上的投影重合，限位框在基准面上的投影位于同一组内的相邻两根连接柱在基准面上的投影之间，同一组内的相邻两根连接柱在基准面上的投影之间的形状与限位框的形状相同。在进行地基注入的时候，能够同时拔出套管本体和注浆管，在进行地基注入的时候有效节约了时间，同时也便于进行运输。

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