I am looking for retaining wall design (e.g bored pile wall) charts which allow me to roughly estimate the reqired I value and embedded depth for some given conditons/parameters (i.e. surcharge, angle of friction, retained height).
Does anybody know whether such a design chart is available or...
I am working on a bridge project and the foundation is that: bored piles of 600mm diameter will rest on clalk which is covered a 12m thick soft made ground. A geotechnical engineer said "it would be difficult to lower (the bottom of) a reinforcement cage deep down to the pile base if the pile is...
Has anybody read “Precast Segmental Box Girder Bridge Manual”, Post-Tensioning Institute and Prestressed Concrete Institute???
I got a question about distribution of BM after a joint is formed to connect two erected spans.
Refer to Fig 3.18 (b), Step 3 on page 39, it shows that all erected...
I'm going to design a very short span (of 9m 10m long) RC slab bridge carrying one carriageway and a footway with 3 piles at each end (spaced at approx 3.1m spacing).
Since the bridge is very very short, local effects (such as punching shear, transverse bending moment) may be more critical than...
In checking the sliding stability at intermediate levels of a gabion wall, what is the angle of friction on the interface between two gabions/baskets?
In addition, what is the unit weight of the rock fill in the preliminary design?
Thanks
I have a question about the temperature difference load:
In Fig.11.5 of the mentioned book, all the three spans are subject to temperature load. In Fig. 11.5 (c) there is a pair of restrained moments at the ends because there are no adjacent members to balance them. My question is that if the...
I am a bridge engineers and want to ask a question about electric boiler....
I've moved into a new flat whiich is fitted with an electric bolier. I find it doesn;t work very well. Could anybody tell me, after swithing it on, how long I have to waited before I can turn the hot water tape?
In...
I've done a set of codes or a function, see below) which will be recalled to to do a simple task.
However, I found the function only "recalculates/runs" when the (contents of) arguments have been chnages "directly". As this function is called and appears in a worksheet where the users cannot...
I have a problem about using VBA for Excel to search for a minimum value for a function within a given range of independent variables. (i.e. Min of f(x) and x1 < x < x2). The major tricky point is that it is difficult to do differentiation.
I am doing preliminary design of a subway and found the midspan deflection of the top slab being very high because the horizontal resistance provided by the soil acting on the wall has been neglected. Now that I have to take the horiz subgrade rection into account and hope it can reduced the...
I am going to look at a steel tie arch where the bridge deck is hung by steel hangers (actually steel rods). However, when I did a search on Google, I wasn't able to find a supplier or manufacturer who is specialized in this field. Could anybody advise me who I have to contact?
I have a question about secant bored pile construction:
The secant piles (of 10-15m long) are supposed to be constructed in a layer of rock which is porous and low compressive strength. Another constraint is the water table is very high.
Does anybody know there is any method of keeping the...
Does any foundation engineer know whether secant bored pile (wall) is able to be socketed down into "Porous Rock - Allowable Bearing Pressure = 1000 kN/m square" for say 3-5 metres?????
Hi,
Does anybody know a good but free :)finite element program for
1. Elastic Analysis
2. Creep Analysis
for bridge engineering.
The important point is the program has a strong meshing capability...
The well known general equation for the ultimate bearing capacity is for the circular, rectangular or strip foundation. Does anyone know how to modify it so it can be used for L-shape footing?
I have gone through some pile cap design reference books and found those books only deal with the pile cap subject to vertical load. Does anybody know why not horizontal load is not considered?
