Would like to know the selection criteria? Mine is having discharge of 1 m3/s and Pump head in the range of 300 m. The length of the raising main in the range of 30-40km.
looking for your answers...
Raj
Thanks..LittleInch & HTURKAK
Regarding the video, we will not be taking all, as I told you I need a temporary cantilever arrangement to access the right abutment and if I can do that, I can erect the bridge from left with Incremental launching method, there is no dearth in space in left side...
Okay I got it, tunneling from the further end to the bridge location will take more than a year, so the plan is to build the permanent truss and excavated the tunnel downstream of the bridge from both side to reduce tunneling time. The permanent bridge would carry the tunneling equipment load...
Hi..
The problem due to some clearance issue where you can not launch from the bottom and since when you say it will meet the two, I mean that you want assemble at the bottom stream level and then lift the bridge for 70m.Tunnel- bridge alignment is above 70m from the stream bed level. And...
Apology, sending the PDF copy...Title block I have withdrawn due to property right issue. Thanks for yours feedback.https://files.engineering.com/getfile.aspx?folder=a5dc8940-5b3c-4362-bf2d-ff6ecb4e9821&file=Aqueduct.pdf
L-section.. access is from left side..https://files.engineering.com/getfile.aspx?folder=3881f8a3-81b2-428b-8581-dd62d9414646&file=Section-_enlarged_section_for_bridge_assembly,_later_to_concreted.JPG
Thanks dhengr !!
For your reply, the pipe is one number 4 m dia, will be taken over the Pratt type steel truss with concrete pedestal. Actually water coming from the tunnel is taken through the pipe to cross the stream below. Scaffolding seems difficult from the bottom river which is 70 m...
Thank HTURKAK
Your assumptions are right, plan was to build a pratt type truss as I attached in my first post, the bridge to be launched through incremental method, however the problem was not anticipated was the approach to the right abutment which is not accessible, so how to prepare the...
yes, I like the launching of pipe by counter weight method from one side and after I transport man, material through empty pipe (penstock) to other side & prepare the abutment that side, then we can take away the pipe, install the bridge and then supported one pipe on the bridge on concrete...
Hello..
I need some expertise views in Bridge Launching aspect, we are building a aqueduct (steel bridge Pratt type) for carrying water under pressure through steel pipes over the bridge. The pipe starts from an Underground tunnel and after crossing the bridge ends in the tunnel on the other...
"Which WAS the CODE ??"
This is as per Indian concrete Code IS 456, which under its working stress (WSM) Annexure (now WSM is part of Annexure, where LSM are in the main code) says the following under a table (Pic)
I always have taken it for granted without asking why...
Thanks dhengr.. for your detailed response, but I am not hiding any secret, you must have missed my attachment in the last post (word file), showing actual condition.
Thanks & regards
Raj
Now to do away the confusion, the hand sketch is attached with autocad drawings of the vertical shaft.
I want the ideas and engineering practicability both design as well as construction wise.
1st view was to lower it as a free standing cylindrical shell. but which will be having a large...
Thanks everyone for the response...
Now i explain to you about the problem in detail. The is related to a hydro electric system water conductor system where a surge shaft is provided to take the transient pressure due to sudden closing or opening of the turbine.
The operational plant is having a...
