Methods in Surveying Highrise building (30 floors) with adjacent buildings approximately 10 meters

Kindly help me.. i am a Survey Engineer and it is my first time to handle a HIGH RISE building 30 storey.. I am thinking, when i reached 15-30 floors.. how can i transfer points from ground to those floors.. kindly give me some advise. or steps.. it will help me a lot please...

Find Similar Content by Clicking These Tags ☟
Subject Tags: engineering, high-rise, surveying

This Content Originally Published to Land Surveyors United Network

Views: 2358

☇ Reply to this

Replies to This Discussion

You can plumb those points if the points within building if the controls outside you can set parallel axis relating to the new building,can use diagonal eyepiece attached to the instrument,to transfer those axis or controls,to the required places,evan from adjoining building,or if you can fix targets on three control points not falling in danger circle,can resect any point and fix new control,buildings should always to the plumb vertical line,if not for special construction like Pisa Tower

Two assumptions to start with:

1. This is a steel structure and your concern is STRAIGHT UP.

2. You have "quality control checked"  and know exactly where horizontally your steel columns are setting     to the nearest hundredth. AND you have reviewed your "asbuilt" findings with the project

    superintendent. This takes care of your "CYA". OK!

Once the bottom floor columns are in place, FORGET ABOUT GROUND CONTROL--DON'T EVER

GO THERE AGAIN.

Most vertical steel columns come in "two-floor" increments with a splice just above the 2nd floor.

On the ground floor set a TOPCON prismless total station on your tripod. Remove the eye piece and

attach a 90 degree eye in its place. With out this equipment----forget it---your not going to get the job done. Once done with the ground floor set-ups get rid of the tripod also.

Here is your process. Assuming they are erecting sections of the building of about 3 columns wide

by 5 columns depth and remember it is two floors at a time vertically.

Set your tripod and Total station on the ground floor just off line with the nearest column your shooting in

the row of 5 columns such that you can see part of the flange of each column AND you can see the bottom of each column and the top of each column just below the splice--WARNING: make sure you are

not shooting the splice plate----only the column flange. Level up your insturment and your ready to go.

Get an 8 1/2 by 11 sheet of paper on a clip board with the column symbols laid out with plenty of space

between for shot notes. Be sure to properly label this sheet AND never let it get away from you---give out only copies to the steel workers and your boss.

You will be recording shots twice: once on the intitial erection AND on a clean sheet for the final asbuilt

when the steel crew is "cranking" the adjustment cables. The steel crew will use your first shot record

to determine where they need to erect adjustment cables. You aim the gun just a few inches above its base and lock the horizontal; then shoot the flange by pushing the H DISTANCE button on the gun. record

the average of several shots. then carefully raise the scope without moving the horizontal to just below the splice plate (two floors up). This probably should not be more than about 45 degrees off horizontal. Now

push your DISTANCE button several times and record the distance; It will be either closer to you at the top or farther from you. Now unlock your horizontal and put your vertical eye hair at the edge of the flange

near your top shot and lock the horizontal; then lower the scope to the base; have someone put a tape aganst the edge of the flange and read it through your scope: that is how far it must move in the perpendicular direction at the top. Be sure to record this just in case the steel crew doesn't want to move it---show it to the boss---it will mess you up going on up.

Now! Once off the ground floor have the steel workers  cut you two 3x3 angle irons 

that have bolt holes to attach to any column with a welded plate to mount the gun too.

Be sure to give yourself about 1 1/2 foot from the center of the gun to the near edge of

the flange. Just keep doing this as you go up---over and over. Have fun.

Good morning,

Another way, a little less complicated, can be RESECTION on each floor using your Total Station, just be sure the Ground Control Points are VERY GOOD, this is maximum 3 mm Residual difference and 1" angle residual difference, check all your GCP, then you can set your Control Points on top of the adjacent buildings and GO...

Yes but three contol point shoud not be ondanger circle,as I have stated above reflector-less or any prism placed at a point will not give us 3mm accuracy,best way to read off the mm tape with swing to read the minimum reading

what do you mean by "contol point shoud not be ondanger circle"

If the the point you are going to fix,is on the circle passing through the three control points there are many points on the circle,and there is an ambiguity
http://en.wikipedia.org/wiki/Resection_(orientation)
Please see
Cheers!
Lalith
Caution: When planning to perform a resection, the surveyor must first plot the locations of the known points along with the approximate unknown point of observation. If all points, including the unknown point, lie close to a circle that can be placed on all four points, then there is no solution or the high risk of an erroneous solution. This is known as observing on the “danger circle”. The poor solution stems from the property of a chord subtending equal angles to any other point on the circle.

Hi,

The rule of thumb to do Resection the angle between GCP must be minimum 45 degrees

I use to do minimum 90 and if possible more than 135.

thanks guy, any more comments?

Everything looks nice but... remember that the structure will be moving, wind, transit, things going up and down, etc. have you ever seen a plumb holding about 50m or more??? the same will do your instrument doesn´t matter the brand.

I would do the vertical control with total station from the ground if possible, then you can place control points on each "floor" by GPS 24hs sesion, and from there measure distances to columns.

I have seen 10 floors buildings made with a plumb, a can, and some oil that pass a total station control quite well.

By 24hs I meant various short sessions covering all the day.

RSS

Global Trade organization for Professional Land Surveyors and Geospatial Pros. Frictionless GeoCollaboration Surveying Forum and Groups

Surveyor Hubs and Tags

Surveyor Community Hubs For World Regions

Surveying Hubs For US States

Social Support For Equipment

Surveying Photos by Tag

Surveying Videos by Tag


What You Missed

Lourens Pepping replied to Lourens Pepping's discussion attribute display in txt file in the group Trimble Support Group
"Darren  Thank you for the information, that should work. do you also happen to know if…"
3 hours ago
Tiago Dias posted a photo
4 hours ago
Darren Noble replied to Lourens Pepping's discussion attribute display in txt file in the group Trimble Support Group
"Hi Lourens, I'm not sure about changing the stylesheet, but this would be a simple task in…"
13 hours ago
Mahmoud Khalifa updated their profile
15 hours ago
Mahmoud Khalifa commented on Arturo Escalante's status
"Hello, can you join us…"
15 hours ago
Mahmoud Khalifa replied to Mahmoud Khalifa's discussion Simple Survey
"Sir Paul, thanks for your reply and your valuable advice. I have a question about reference system,…"
15 hours ago
Lourens Pepping added a discussion to the group Trimble Support Group
Land Survey Media Thumbnail

attribute display in txt file

Hey guys,I'm trying to get my trimble style sheet to put my atribute before my code in the…See More
21 hours ago
Lourens Pepping joined LSU Justin's group
Land Survey Media Thumbnail

Trimble Support Group

This group is for LSU members who use Trimble in the field. This group is for discussions and…See More
21 hours ago
Szymon Oleksiewicz shared a profile on Facebook
yesterday
Eng-Ali Raza Mughal promoted Malik Abdur Rehman's discussion Radial Easting Northing
yesterday
Eng-Ali Raza Mughal promoted Malik Abdur Rehman's group Excel Spreadsheets for Surveyors
yesterday
Arturo Escalante posted a status
"What would you like to learn today?"
yesterday
Arturo Escalante posted a status
"What would you like to learn today?"
yesterday
Peter Tapken replied to Paul Quagge's discussion Javad Triumph 2
"Hi Paul, If you are looking for product information and want to read reviews and compare product…"
Wednesday
Deward Karl Bowles's discussion was featured
Tuesday
Muhammad Junaid's discussion was featured

Canal Cross Sections excavation volume calculation weekly

Dear All,                I am working on canal project,all of cross sections i prepared in auto…See More
Tuesday
Tutsi Ngoro promoted Malik Abdur Rehman's group Excel Spreadsheets for Surveyors
Tuesday
ePalmetto replied to Paul Quagge's discussion Javad Triumph 2
Tuesday
Profile IconFarhad Fatehi, Tutsi Ngoro, Kevin Scott Walker and 6 more joined Land Surveyors United
Tuesday
Midland Survey updated their profile
Tuesday

Take This Page With You

follow us in feedly

Take this Page With You

QR Code for This Page: What is this?

Surveyor Goodies

© 2014   © Created by Land Surveyors United

Badges  |  Contact LSU  |  Privacy Policy  |  Terms of Service

Related Posts for Land Surveyors UnitedRelated Posts Plugin for Land Surveyors United Network ForumRelated Surveying Photos Land Surveyors United Live Support