Restoration of Durbar Hall at University College for Women, Koti, … · 2018-12-01 · Restoration of Darbar Hall at University College for Women, Koti, Hyderabad Phase I LOWER GROUND

Restoration of Durbar

Hall at University

College for Women,

Koti, Hyderabad

Progress Report

March 2016

WORLD

MONUMENTS

FUND

Phase IRestoration of Darbar Hall at University College for Women, Koti, Hyderabad

CONSULTANTS

Ar. Ravi Gundu Rao

Ar. B. Sarath Chandra

Ar. Anuradha Naik

Ar. Tapan Mittal Deshpande

Ar. Apoorva Pillay

Ar. Anshul Rawat

JEERNODHAR CONSERAVTORS PVT. LTD.

Nilesh Thakkar

Gautam Ramesh

WORLD

MONUMENTS

FUND

STATE ARCHAEOLOGY DEPARTMENT

N.R. Visalatchy, Director

Raheem Shah, Deputy Director

OSMANIA UNIVERSITY

UNIVERSITY COLLEGE FOR WOMEN

Prof. B.T. Seetha, Principal

Prof. Y.L. Srinivas, PRO

BUILDING DIVISION

B.L.N. Reddy, Consulting Chief Engineer

Srinivas Reddy, Executive Engineer (EE)

V. Devapriya, Dy EE

D. Anjali, AEE

PROJECT TEAM


COMPLETED Exceeding Quantity DURATION OF WORK LEFT

Items of Work

1. Dismantling wooden structural system: timber in roofs and floors

2. Clean removal of cement plaster from walls and raking out joints

3. Laying lime concrete 1:1½:2 (1 lime: 1½ sand: 2 Brick Agregate)

4. Provision of Teak Wood to be put up for main structural beams

5. Providing Anti termite treatment as per IS 6315

6. Providing and applying steel protection coating

7. Plastering with Lime Surkhi plaster of thickness 25mm including preparation of mortar

8. Additional thickness of 20mm of Lime plaster as per the original thickness of the plaster

9. Stitching of cracks using stone lintels (50x150x1000mm)

10. Recycling old wood dismantled from the building for restoration purposes

Phase IRestoration of Darbar Hall at University College for Women, Koti, Hyderabad LOWER GROUND FLOOR

STAGES OF WORK → 1 2

Stone and mud masonry visible after dismantling cementplaster near the staircase.

Openings below the staircase, filled up with brick masonry.

CLEARANCE AND DISMANTLING- CEMENT PLASTER

STAGES OF WORK → BEFORE AFTER

Stone slab at the base of anarch, which was once closedwith brick masonry.

The stone slabs were demolished and the arches were openedup.

CLEARANCE AND DISMANTLING- EASTERN OPENINGS

Starting of work: 04.03.2016Status: On-going

Duration of work: 2 DaysStatus: Completed

Phase I

STAGES OF WORK → BEFORE AFTER

Careful removal of cement plaster and damaged lime plaster from walls of oval room for opening up of cracks

Restoration of Darbar Hall at University College for Women, Koti, Hyderabad

CLEARANCE AND DISMANTLING- PLASTER REMOVAL

↑N

Cement plaster layer removed Lime plaster layer removed

FIRST FLOOR



Decayed wooden beams at the top of surrounding wallsin first floor lobby, have beendismantled completely, to preventfurther structural damage due towood decay.

CLEARANCE AND DISMANTLING- WOODEN BEAM



STAGES OF WORK → 1

Wooden beams have been replaced with brick masonry inlime mortar to pack the vacant space.The wooden beam is carefully pulled down and the vacantspace is cleaned and washed.After cleaning, the consolidation of brick wall is carriedout with new brick masonry in lime mortar.This intervention would further prevent structural damageto the building due to wood decay.

STRUCTURAL CONSOLIDATION- BRICK WORK

STAGES OF WORK →

Crack stitching with granite lintel (50mmx150mmx1000mm).The crack is opened up, the loose masonry is removed and thenthe void is washed properly with a jet sprayThe granite stone is then placed carefully in the void.After the insertion of granite block, the crack is tightly packed withbrick and lime. A nozzle is inserted for further grouting

STRUCTURAL CONSOLIDATION- CRACK STITCHING


Opening in the wall visible after removal of plaster

FIRST FLOOR


Phase IRestoration of Darbar Hall at University College for Women, Koti, Hyderabad FIRST FLOOR


Old decayed wooden lintels were carefully dismantled from the openingsafter propping them,and replaced withnew, chemicallytreated wood.

Replaced newwooden lintel

STRUCTURAL CONSOLIDATION- WOODEN LINTEL IN OPENINGS

STAGES OF WORK →

The picture shows the application of anti-termite paint onthe wooden lintel of size (6’’x4’’x7’).

Replaced new wooden lintel in the opening in one of therooms on first floor.

STRUCTURAL CONSOLIDATION- WOODEN LINTEL IN OPENINGS



Phase I

3

Planks are screwed (8mm ø; 2’’ long screws) onto thewooden rafters.Wooden flooring after the completion of fixing floorplanks to the wooden rafter frame below.

Restoration of Darbar Hall at University College for Women, Koti, Hyderabad FIRST FLOOR


After the restoration of damaged wooden rafters, woodenfloor planks are laid over the structural frame.

Planks are joined together with a tongue and groove jointat the ends.

STRUCTURAL CONSOLIDATION- WOODEN FLOORING

↑NNew rafters


SECTION OF WOODEN FLOORING

BEAM SECTIONBEAM & RAFTER DETAILJOINARY DETAIL OF RAFTERS

Phase I

The consolidated old beam is tied and then lift witha crane. After the beam has been lifted up, themajor task is to place the beam inside the wallend. The whole process requires a lot of manpower.Crane lifting capacity: 100 tonnesTime taken: 40minMan power: 8-10 people



The remaining wooden part of the old beam inside the wall,is removed completely

The debris is removed and the space is cleaned properlyfor placing the beam

STRUCTURAL CONSOLIDATION- PLACEMENT OF BEAM

↑N

Duration of work: 14 DaySStatus: Completed

FIRST FLOOR

Phase I

Cross-section of Dome 3

Application of final finish of smooth lime plaster (niru maal) onthe dome.



1.5’’ thick rough lime plastering was applied as the firstlayer on the external surface of dome after carefulremoval of cement plaster.

The 2nd layer of lime plaster is ¼ ’’ thick.

TERRACE

↑N

CONSOLIDATION- LIME PLASTERING ON DOME


Phase IRestoration of Darbar Hall at University College for Women, Koti, Hyderabad TERRACE


A solution of slaked lime mixed with water, saras(animalfat), jaggery, surkhi(brick powder) and marble powder isprepared as a grouting solution, which is poured on theground so that it gets into each crack in the floor.

After 1st layer of grouting, a thin layer of waterproofingcloth material is laid on the ground, over which anotherlayer of viscous grouting mixture is laid uniformly.

↑N

CONSOLIDATION- WATERPROOFING


4 3

The first layer of kappi is compacted well, using wooden batsto repeatedly strike the ground.

Mixture of lime and brick bats are laid evenly on ground andcompacted well. The first layer of kappi (lime concrete) is4’’ thick overall and 2.5’’ thick towards the drain.

Phase I

7

After the completion of waterproofing, gunny bags are laid overit and water is sprinkled all over, to keep the waterproofing wetthroughout in order to prevent cracks.


5 6

2nd layer of lime concrete (3’’ thick) is laid over the 1st layer.Through repeated compaction, the surface is given an even surface, with a clear slope towards the drain.

Waterproofing layer after the completion of compaction.

4:7 Gradient towards the drain

4:7 Gradient towards the drain

TERRACE


MATERIAL MATERIAL PROCUREMENT/ PROCESSING

1. Lime Preparation of niru maal on siteThis is a type of fine plaster which is applied over mota maal (which is the rough first layer of lime plaster on any surface).Niru maal is applied for final smoother finish on surface.One truck load of lime ordered in March

2. Wire cut bricks

Bricks have been cut on site as per desired/required size for various on site construction/consolidation works

3. Beam The irregular edges of the beam were chiselled off and were given a sharpedge. The wood was treated and processed to give a finished look.

Preparation of beamfor oval room- The damagedbeam would beconsolidated usingwooden pieces ofrequired sizes andfurther joinedtogether usingSS clamps.- It would be furtherheld together with ametal capping.

MATERIAL PREPARATION

Mortise and tenon joint for joining wooden parts

to the old beam

Placing of wooden parts on the beam


MATERIAL MATERIAL PROCUREMENT/ PROCESSING

3. Beam Fixing of all the partsof the beam togetherto complete thecomposite beam forthe western oval room

Anticorrosive paint is applied on thebeam and once it dries, SS clamps arefixed with screws at the consolidated end,to hold the joints together.

Documents

Restoration of Durbar Hall at University College for Women, Koti, … · 2018-12-01 · Restoration of Darbar Hall at University College for Women, Koti, Hyderabad Phase I LOWER GROUND