I have 50 ft wide, 25 ft deep excavation and I am designing solider pile wall with wale and horizontal internal strut. the strut force is about 50 kip, I am looking for a detail for the strut spanning between two parallel pile walls and between the two perpendicular ones. any example will help...
I want to instrument a mini pile with several strain gages spaced at 1 to 2 m apart along the socket for tension load test. should I weld those gages to the threadbar (if weldable) or just tie them to the rebar and grout the pile? any photos showing this done before are appreciated.
I performed a pumping test near a basement with an active drainage system. the pumping test was within the cone of depression of the basement which produced a cone within a cone. The initial cone of depression invalidates one of the assumptions in the Dupuit equation. Is there a modified...
Anyone has designed shoring to retain 18 ft of fill and soil, then 25 ft rock below it? I am thinking of soldier pils with one row of tiebacks for the top and rock bolts for the rock below but not sure about the soldier pile embedment, maybe I should put a tieback close to the bottom of the...
The basement wall has a geocomposite sheet drain (geotextile and drainage core)
Any comment on the following claims:
1. that the flowable fill will clog the drainage by seeping through the geotextile when placed wet due to cement particles smaller than geotextile AOS.
2. that the flowable fill...
Neighbors across street don't like tiebacks below their property so I am thinking 3 levels of rakers with reaction blocks, any precautions/issues to look out for given the depth of excavation? top 20 ft is medium dense fill/natural, bottom 20 ft is good dense to very dense natural sand and...
I am designing geocompisite sheet drain system for a basement wall where there is no space for pipe and stone due to shoring. link below is what I have in mind. The typical value for flow rate is for 100% gradient (vertical flow) and Koerner has example for design calcs. for the bottom portion...
Contractor wants to backfill the caissons for the soldier piles with stone or sand instead of 100 or 200 psi flowable fill. He thinks this is the only way he can retrieve the steel piles. The original design of the 12 ft cantilever system was with 2 ft diameter, 13 ft long caisson backfilled...
A separate discussion on different forum led to this post.
Is there a formula to calculate the moment capacity of a composite section consists of a circular concrete section and a W or HP steel section centered in it? Les's say I have 2 ft diameter, 4,000 psi concrete circular section and I...
what concrete strength is high enough when considering the lateral resistance of a cantilevered soldier pile and lagging yet low enough so soldier piles can be removed from their caissons with a backhoe? I am trying to see how much steel can be salvaged I am thinking of 500 psi is a happy...
I am currently using AutoCAD to manually draft shoring drawings. Is there a modeling software that is utilized by geotech engineers to 3D model shoring systems (such as soldier pile and lagging with tiebacks) similar to what Revit offers for structural engineers? I watched some youtube videos on...
The following are the results of chemical analysis:
C:0.11
Mn 0.46
P 0.08
S 0.42
Si 0.02
Cr 0.008
Ni 0.005
The P content is high, how to determine the weldability of this steel?
I am looking for a software dedicated for the geotechnical engineer which can model excavation support systems, foundation systems and retaining walls (MSE, gravity, etc.) and produce complete set of drawings with tables and schedules.
Rockware is very powerful for geotechnical investigations...
30 ft deep excavation is proposed for mat foundation of 50-story highrise right next to 100 years old 4-story stone building with 18" wide stone foundation, 7 ft below grade. Rock is 20 ft below the excavation (50 ft below ground). To minimize settlement of the stone building, geotechnical...
Do I need to design the rebar for the O-Cell test pile socketed in rock or are the pair of C5 steel channel (o cell carrying cage) along with the concrete which is under compression enough to carry the test load to failure at around 5,000 kip?
RCSC specs says:
The pre-installation test is used to verify that the fastener assemblies and pretensioned installation procedures perform as required.
The point of argument between me and my project manager is that he thinks that for high strength TC bolts pretensioned using a shear wrench the...
