Hello everyone
For a canal improvement project, we are converting 3 kilometers of open channel into a multi-cell box culvert. We are using SWMM to model the secondary drainage network, the box culvert, and the open channel. Because of SWMM's Courant condition, there is a minimum conduit...
Hello everyone.
I have 2 questions.
(1) I am calculating the reaction force on box culvert junction structures which connect 2 sections at an angle of 90 degrees. This is an improvement of an existing canal, and this extreme angle is the result of resettlement constraints.
Using the momentum...
Hello everyone.
I have 2 questions.
(1) I am calculating the reaction force on box culvert junction structures which connect 2 sections at an angle of 90 degrees. This is an improvement of an existing canal, and this extreme angle is the result of resettlement constraints.
Using the momentum...
Hello everyone
I'm on a drainage project in Vietnam, which entails converting a 4.3 km section of filthy canal into continuously connected box culvert sections (with a road on top!). The slope is extremely mild - 0.0005 to 0.001 m/m. The lower half of the system is subject to tidal backwater...
Hello
After contacting the HEC-Ras team (you can only report suspected bugs - not support!), the problem described above is indeed a bug which has been fixed for the next release.
Nick
This is Nick again from Vietnam.
We have a canal that we are trying to upgrade, and the city authorities are sold on canal linings consisting of corrugated pre-cast concrete sheet pilings. The surface profile of the sections look like this:
__ __
_/ \__/ \_
The projections are...
Hello everyone
I'm on a drainage project in Vietnam, which entails converting a 4.3 km section of filthy canal into continuously connected box culvert sections (with a road on top!). The slope is extremely mild - 0.0005 to 0.001 m/m. The lower half of the system is subject to tidal backwater...
Hello everyone.
I hope someone has a a reply for this.
A trivial, but exasparating problem. I have a simple 3 reach system (a canal) with a branch at a junction. The steady-flow model runs with no major warnings, and the results are reasonable.
But the profile shows a gap , the same...
This is Nick again from Vietnam.
I need some advice on Vane Shear tests. I got some results - a peak torque of 134 Kn-m and according to the formula for a rectangular vane where D = diameter of vane = 0.1m
6 x Peak Torque/7 x pi x D(cubed) results in 151 Kn/m2
This to me is rather high, since...
Hello All
I am working on a drainage project in Ho Chi Minh City in Vietnam.
I have inherited a design for the transformation of an open channel drainage canal into a 4 kilometer-long box culvert that increases in size (in both dimensions) as well as in the number of barrels, starting with 2...
Thanks a lot BigH
I didn't think it was too much of a problem for the samples. Except perhaps for very permeable sands, there might be some contamination.
We are taking SPT/split spoon, and driving in Shelby tubes for 'undisturbed' samples.
Standpipes are not in our contract (I guess the...
Hello All
I am working on a drainage project in Ho Chi Minh City in Vietnam.
I have inherited a design for the transformation of an open channel drainage canal into a 4 kilometer-long box culvert that increases in size (in both dimensions) as well as in the number of barrels, starting with 2...
Hello all
I've just been assigned to a project in Vietnam, where a site investigation in unconsolidated deposits (predominantly clay) is currently in progress. Drilling is with small coring rigs, advancing the hole with single barrel core barrels and bentonite as drilling fluid. This is my...
I am working in Vietnam in a project that includes the design of bridges, roads, and canal embankment modifications, so both shallow and deep foundations are involved. The ground is characterized by soft organic clays and high water level elevations.
The problem I am having is with the drilling...
