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Civil Industrial Training.ppt

civil engineering subject




METRO RAIL - THE DREAM PROJECT OF HYDERABAD MISSION HMR “To create an efficient,safe,reliable,economical &  world class public transportation system in  Hyderabad which will facilitate the city’s  transformation as a competitive global city with  high quality of life.”  MISSION HMR “To create an efficient,safe,reliable,economical &  world class public transportation system in  Hyderabad which will facilitate the city’s  transformation as a competitive global city with  high quality of life.”  WHY METRO    Population stands at 8 million and is projected to touch 13.64 million by 2021. Currently, Currently, over 2.8 million personaliz pe rsonalized ed vehicles ply on Hyderabad roads, with an addition of 0.20 million vehicles every year. 8 million mil lion motorized motoriz ed trips trip s are made every every day, day, of which, only about 3.36 million mil lion or 42% are made by the Public Transportation System (PTS) i.e., buses and local trains. That means the rest of the trips are made by personal  vehicles leading to to traffic bottlenecks, bottlenecks, high pollution levels levels and a steep increase in fuel consumption. SOLUTION  The answer lies in Mass Rapid Transit System (MRTS).  According  Acc ordingly ly,, the development development of Metro Metro Rail was approved approved for 71.16 km., covering covering three high h igh density  traffic corridors of Hyderabad. The Project will be be developed on BOT basis in PPP mode. P-P-P MODE Public Private Partnership SALIENT FEATURES     India’s first project signed by the GoI as public private partnership project in India. Providing a complete elevated experience for the citizens through out a length of 71.16 kms. Longest elevated MRTS project in ASIA.  Asia’s first elevated guide way accommodating two rail lines. DESCRIPTION OF PROJECT    Project cost: Rs.14,132 Cr.  A sum of Rs.1,458 Cr. is released by the GOI and the remaining investment Rs.12,674 Cr. is invested by the concessionaire.  Additional amount of Rs.1,980 Cr. Is being spent by  the govt of AP for land acquisition and other amenities. The project is being carried out in 3 high density traffic corridors under PHASE-1.    Miyapur-L.B.Nagar (28.87 kms; 27 stations) travel time: 45 min Road: 1hr 45min. Secunderabad-Falaknuma (14.78kms; 16 stations) travel time: 22 min Road: 1hr 10min. Nagole-Shilparamam (27.51kms; 23 stations) travel time: 39min Road: 1hr 26min. DESIGN CONCEPTS      Two tracks (up and down lines) on elevated viaduct of 9m  wide erected on pillars in the central median of roads. Standard gauge track (1435 mm) to allow sharper curves and gradients. Speeds of 34 kmph on an average to 80 kmph max. Elevated world-class stations at 1 km distance with passenger access through staircases, escalators and lifts. Frequency of 3 to 5 minutes – is expected to carry about 14.76 lakh passengers p/day by 2015 and 22.13 lakh passengers p/day by 2025.        Continuously welded rails to minimize noise levels. 25 kV, 50 Hz AC through overhead catenary.  AC coaches with automatic door movements and many other safety and comfort features.  Automatic Train Control (ATC), Automatic Train Protection (ATP) & up gradation to Automatic Train Operation (ATO). Greater traffic carrying capacity. CCTV’s in stations for better security.  Video cameras in coaches. CONCESSIONAIRE CONSULTANTS     An international MRTS consultancy LEWIS BERGERIndependent Engineer.  AECOMM-General Consultant. 9 well experienced MRTS Engineers in the Experts panel of HMR. CONCESSION AGREEMENT On basis of  DBFOT- Design, Build, Finance, Operate, Transfer. It is PPP – Public Private Partnership. Conditions Precedent Concessionaire shall have : To provide performance security. To execute : Escrow Substitution Shareholders agreements. To provide true copies of financial package and models.    Government shall have :    To provide Right of Way to the site. To provide Right of Way for the construction of rail track in three corridors. To issue fare notifications. Obligations of the concessionaire     Procure finance for and undertake the design, operation, construction and maintenance. Must not omit, which may violate the provisions of  agreement. Support, cooperate with the government in the implementation. Change in ownership. Obligations of Government  Maintenance obligation prior to the appointed date.  Obligations relating to competing facilities.  Obligations relating to supply of electricity. Performance Security   The concessionaire provides an irrevocable and unconditional guarantee from a bank for 360 crores. Performance security is not provided within a period of 180 days from the date of agreement. Right Of Way   Government grants access to the site for carrying out surveys, investigations, and soil tests. Initially, 90% of the R.O.W has to be given by the government or at a 2 km stretch. Penalties In case of not fulfillment of clearance of right of   way, the government shall pay 0.1% of performance security per day.   In case of not fulfillment in the construction, the concessionaire shall pay 0.2% of performance security. SOIL INVESTIGATIONS Field Tests - Bore Holes     Holes are drilled with respect to depth of  investigation. Details of boring, reduced levels, SPT-N values are tabulated into bore logs and lithological logs. Undisturbed and disturbed samples are collected. This is terminated when: SPT-N value > 100 or CR=0 for 5m approx. Field Tests - SPT Test    Split spoon sampler is lowered and driven under 63.5 kg load. Initial 15 cm is taken as seating drive. Number of blows for further 30 cm is recorded and it is the SPT-N value. Laboratory Tests-Rock  Point Load Test  Density and Porosity   Compressive Strength Test  Chemical Analysis Laboratory tests- Soil  Grain size analysis  Specific gravity   Moisture content  Atterberg’s limits  Subsoil Layer  Top layer : Fill material  Second layer : Silty sand / Clayey , with gravel   Third layer : Weathered granite rock of grade V  and VI Fourth layer : Granite rock of grade I to IV  Shallow Foundations Bearing Capacity:  In sandy soils, φ is determined by Standard Penetration Test. Φ is used for the determination of Ultimate bearing capacity. Safe bearing capacity : S.B.C = U.B.C / 2.5  Deep Foundations It transfers axial loads either substantially by  friction along its shaft and by end bearing. Based on the present soil stratum, deep foundation  will transfer loads predominantly by end bearing.  Drilled Shafts  Reduces time for foundation construction.  Minimizes the foot print area of construction.  It can be rested completely on weathered rock or sound rock strata. Recommendations  Allowable bearing capacity of shallow foundations can be increased by 33.33% in case of seismic or wind loading.  Pile foundation system is bored cast in-situ  with a pile of diameter of 1 - 1.2 m with safe bearing capacity of 375 T to 550 T.  BH.NO DEPTH OF FOUNDATION RECOMMENDED FOUNDING  ALLOWABLE STRATUM BEARING CAPACITY  ( T/ sq.m) BH-102 2.5 200 GRANITE ROCK I - IV  BH-103 3.0 50 CLAYEY SAND   Ordinary Portland cement having C3A content from 5 % to 8% , shall be used. Socket length shall be calculated based on vertical and lateral loads. CONSTRUCTION OF PIERS FOR HYDERABAD METRO RAIL STEPS INVOLVED IN PIER CONSTRUCTION  Excavation   Foundation and reinforcement   Shuttering   Erection of pier cap reinforcement   Concreting & compaction of concrete by layers   Deshuttering   Curing  EXCAVATION Excavation is done  by earthmoving  equipment up to  required area  • Excavated earth is  dumped in city  outskirts  • FOUNDATION AND REINFORCEMENT  Based on the subsoil profile and the type of the structures  encountered at most of the locations shallow foundations can  be adopted.  If the soil is weak, a Controlled Low Strength Material   (CLSM) is used to gain the required strength.   A PCC layer of 100mm is laid and the foundation  reinforcement is placed on it.   After the required reinforcement is placed the concreting   for foundation footing is done & M35 grade is used,  pedestal is constructed to a height of 0.5m   Pier starter is concreted up to 500mm.  As per designs the reinforcement of pier is raised.    A PVC pipe of 500mm dia is provided in the  reinforcement to drain away the rain water and it is  connected to the local drain line.   An earthing rod is provided and is connected to the  electrification poles. SHUTTERING & REINFORCEMENT FOR PEDASTAL PIER STARTER PEDASTAL PIER STARTER  DRAINAGE PIPE AND EARTHING ROD EARTHING ROD SHUTTERING   A pre-fabricated shuttering is erected to required height.  The shuttering will rest on the manual jacks, and these jacks  are rested on the concrete blocks placed around the foundation  at same level.  With the help of manual jacks the height of the shuttering  can be controlled. FORM WORK MANUAL JACK SHUTTERING ERECTION OF PIERCAP REINFORCEMENT  As per the designs the   pier cap reinforcement  is done in the casting   yard, and is dumped in  the site. • By using the crane the   pier cap reinforcement  is placed on pier  reinforcement and is  tied to the pier  • CONCRETING  Concreting of the pier is done, layer by layer.  M45 grade concrete is used.  Using the needle vibrator the compaction of the concrete is  achieved and the walls of the shuttering are tapered with  mallet to remove the voids. DESHUTTERING AND CURING  After a minimum  required strength of the  concrete is achieved the  shuttering is removed.   As it is a vertical   raised structure curing  is achieved by painting  a chemical compound.  CASTING YARD WHAT IS CASTING YARD?  An ex-situ place  where segments to  be elevated   between the piers  are cast. Necessity of casting yard Since casting of segments needs  large amounts of space the task of   casting segments becomes tedious at  site. • Managing the traffic becomes a  hectic job. • So there comes a necessity for a  casting yard to speed up the  construction work in a safe manner. • WORK AT CASTING YARD Various segments such as  s1,s2,s3,s4,s4A,s5 are cast. • Each segment is reinforced as per  the design drawings in the  reinforcement jig. •  After the reinforcement of the  segments are done , they are  removed from the jig and placed in  the mould and concreting is done. • BATCHING PLANT Various types of    grades of concrete are  also manufactured at  casting yard in a  batching plant. • M35-Till Pedestal   • M40-For the segments  • M45-For the pier  • DESIGN MIX PROPORTIONS Type M35 M40 Cement Fine  Aggregate Coarse  Aggregate 1 1.6 2.78 1 1.6 2.9 METHODS OF CASTING Long line – multiple segments are  cast. • Short line – single segment is cast. • Various types of segments such as  curved or straight are cast in the long  line mould. • Parts of long line mould are  1. Sawfitt  2. Outer form  3. Inner form  4 B lk h d   • Dimensions of segments cast are: Type Length (m)  Width (m) Centre Side (m) Depth(m ) S1 1.7 8.8 2.01 2.1 S2 3 8.8 2.01 2.1 S3 3 8.8 2.01 2.1 S4 3 8.8 2.01 2.1 S4A 3 8.8 2.01 2.1 Prestressed concrete is a  method for overcoming  concrete's natural weakness in  tension. • Prestressing can be  accomplished in two ways: pre-  tensioned and post tensioned. •  ALIGNMENT OF SEGMENTS