Support of excavation pits
Project of anchor support works
- Primary information:
- hydrogeology report
- static loads
- building constructions
- Determination of the loads, the amont and the density of the ancors.
- Assignment of anchor type system on the basis of the determined loads.
- Assignment of the borehole diameter, the pinning core lenght and the type of the injection material on the basis of the determined loads.
- Constructive documentation of the anchor support works.
Pecularity of the anchor support works
- Drainage of underground waters.
- Presence of underground communications - lengt of the anchors.
- Quality of excavation works - width of the spry concrete.
- Overcoming of local landslides - duration and quality of the support works.
- Support work technology for excavation pits deeper than 8 m. - duration of the support works.
Scheme of the excavation pit support works
Example of whole anchor support process - step by step
Step 1: Drainage, water isolation works.
Step 2: Excavation works and creation of surface layer spry concrete with width ≤ 2 cm.
Step 3: Anchor works. Mounting of steel networks and soil nails.
Step 4: Spry concrete works. Covering the steel networks with spry concrete with width ≤ 25 cm.
Етап 5: Excavation to the next level. Supporting works for the next level of the slope or finishing of the entire process.
