混凝土防渗墙的几种特殊处理方法与质量检查
2018-08-15阿迪力江
阿迪力江
摘 要:防渗墙是修建在挡水建筑物和透水地层中防止渗透的地下连续墙、它的实际应用、却远远超出了防渗的范围、除了用来控制闸坝基础的渗流外、还用于坝体的防渗和加固、泄水建筑物下游基础的防冲、水工建筑物基础的承重、地下水库的修筑等。防渗墙之所以得到如此广泛的应用、主要原因是由于它具有结构可靠、防渗效果好、能适应多种不同的地层条件、施工方便、造价低等优点。
关键词:混凝土防渗墙;特殊处理;质量检查
Concrete cutoff wall several special processing methods and quality checks
A di li jiang
Abstract: diaphragm wall is built in a water retaining structure and permeable strata prevent seepage of underground continuous wall, its actual application, but far beyond the scope of the seepage control, in addition to used to control gate dam foundation seepage outside, also used in the dam body seepage control and reinforcement, drain building downstream basic impingement, hydraulic structure foundation bearing, underground reservoir construction, etc. The diaphragm wall had such a wide range of application, the main reason is because it has the structure to be reliable, seepage control effect is good, can adapt to a variety of different formation conditions, convenient construction, low cost advantages.
Key words: concrete diaphragm wall, Special treatment; Quality inspection
1.混凝土防滲墙的几种特殊处理方法
1.1 导墙严重变形或底部坍塌、宜采取以下处理方法:
(1)破坏部位应重新修筑导墙或采取其他安全施工措施;
(2)改善地基条件和槽内泥浆性能。
1.2 地层严重漏浆、应迅速填入堵漏材料、必要时可回填槽孔。
1.3 混凝土浇筑过程中导管堵塞、坝脱或漏浆需重新下设时、必须采用下列办法:
(1)将导管全部拔出、冲洗、并重新下设、抽净导管内泥浆继续浇筑;
(2)继续浇筑前必须核对混凝土面高程及导管长度、确认导管的安全插入深度。
1.4 混凝土浇筑过程中钢筋笼上浮、需采取以下措施:
(1)应及时调整导管埋入深度并适当降低混凝土面上升速度;
(2)对笼体锚固或压重。
1.5 一、二期槽孔套接接头达不到设计要求的最小墙厚时、可选择下列处理办法:
(1)在接缝上游侧进行高压喷射灌浆或灌浆处理;
(2)在最小套接断面处加打一钻、钻头直径根据接头孔孔斜和设计墙厚选择、成孔后在浇筑混凝土。……
