The embankment and proposed micropile wall was modeled for the purpose of determining the improvement in the stability of the embankment and the probable movements and loads of the micropile structure. The approach consisted of determining the baseline soil in critical embankment stability, FOS
The micropile wall trial design is evaluated against the required resistance by analyzing individual micropiles for axial, shear, and bending strength assuming that each micropile acts as a vertical, free-headed pile.
Soldier piles and lagging - Keller North America
In low headroom or difficult drilling conditions, micropiles may be used. Lagging consisting of wood, steel, or precast concrete panels is inserted behind the front pile flanges as the excavation continues. Additionally, contact lagging or shotcrete may be applied.
Micropiles - Keller North America
Lines of micropiles spanned by wooden lagging can be ideal where excavation walls are required in low headroom and other confined areas. Post-grouting within the bond length can increase frictional forces with surrounding soils and achieve greater capacity.
Category A: Micropiles experiencing primarily axial forces due to axial loading at the top of micropile. This would typically include bridge foundations and may occasionally include walls. For Category A, the contractor determines the length, load testing is …
Design Method for Slide-Stabilizing Micropile Walls
2013年3月28日 · A design method is presented for slope stabilization involving the use of micropiles extending through the sliding mass into more stable material. This type of wall typically consists of a line of micropiles placed into the soil mass at alternating batter angles.
examples are illustrated using case studies from five design/build MSE and pile wall repair projects in the United States. Relevant technologies include the following: traditional soil nailing, reinforced shotcrete, reticulated micropile arrays, and …
Micropiles used in underground walls can be seen as hybrid structures functioning partly as vertically loaded piles, partly as lateral capacity of the retaining wall, or even a heating/cooling insulation barrier when geothermal energy has to be controlled under the building.
King post / soldier piles and lagging walls | Keller Group plc
King post/soldier piles and lagging walls are a cost effective system of temporary or permanent retaining wall using beams and pre-cast concrete panels. Most retention applications and heights in different ground conditions including rock. Often used for basements, embankment retention and flood defence walls.
Micropile A-Walls-Industry Design and Construction Practice Helen Robinson, P.E., D.GE GEI Consultants Exton, PA ISM 14th International Workshop for Micropiles. ... efficiency of A-Wall designs. Final Report •Summary of analyses performed •Address significance of coupling •Identify situations where coupling is most important.