Railway Track Maintenance Types

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Questions and Answers

What is the primary consideration when deciding rail renewals?

Expected service life in terms of Gross Million Tonnes of traffic carried.

Maintainability of track to prescribed standards.

Incidence of rail fractures/failures. (correct)

Plan based renewals.

What is the main difference between casual renewal and scattered renewal?

Size of the renewal area.

Part of normal maintenance operations. (correct)

Location of renewal.

Type of components replaced.

What is the maximum number of rails renewed in a year in scattered renewal?

10 rails. (correct)

20 rails.

5 rails.

None of the above.

What is the main focus of Through Fitting Renewal (R)?

Renewal of liners and GRSPs/CGRSPs. Signup and view all the answers

What is the criterion for prioritizing rail renewals?

Incidence of rail fractures/failures. Signup and view all the answers

What is the minimum number of defective welds per track km that may require Through Rail Renewal?

30 defective welds. Signup and view all the answers

What is the consideration for end cropping with or without welding?

Rail failures at fish plated/welded joints. Signup and view all the answers

What is the characteristic of casual renewal?

Replacement of identical sections of track components. Signup and view all the answers

Why should carrying of rails and heavy articles on the head or shoulder be avoided?

To prevent injury to the workers Signup and view all the answers

What should be done to kinked rails?

Jim-crow them and straighten Signup and view all the answers

Why should punch marks on rails or marking by chisel be prohibited?

To prevent incipient failures Signup and view all the answers

Where should new rails and sleepers for the next day’s work be hauled from?

From the place of unloading to the opposite side of the track Signup and view all the answers

Who should sanction modifications to passenger line layouts?

Commissioner of Railway Safety Signup and view all the answers

What should be made to remove materials lying alongside the track?

Efforts to remove them as soon as possible Signup and view all the answers

Why should standard rail sections be used when relaying points and crossings?

To improve the layout and avoid using old sections Signup and view all the answers

What is the guideline for handling and stacking of rails that should be followed?

RDSO’s Guidelines for Handling and Stacking of Rails October 2014 (CT-35) Signup and view all the answers

What method of relaying is recommended for carrying out track renewals with concrete sleepers?

Relaying with Mechanical Equipment Signup and view all the answers

What should be replaced with standard crossings?

Special crossings in main lines, loops, and sidings Signup and view all the answers

What precautions should be followed in addition to the manual method of relaying for LWR track?

Precautions described in Para 346 & 347 Signup and view all the answers

What should be fixed accurately when relaying points and crossings?

The intersection point of the turnout track and the main line track Signup and view all the answers

Why should joints on SRJ and lead rails be welded?

To improve the safety of the tracks Signup and view all the answers

Who is responsible for the correct gauging of switches?

JE/SSE/P.Way Signup and view all the answers

What should be examined before connecting stretcher bars?

The tongue rail Signup and view all the answers

What should be done if a tongue rail does not fit properly against the stock rail?

Carefully jim-crow the tongue rail Signup and view all the answers

What is the purpose of the 'Summary of P.Way Material to be released' annexure?

To record the release of materials from stock Signup and view all the answers

What information is required in the 'Name of work' section of the annexure?

Location of the railway project Signup and view all the answers

What is the purpose of the 'Weight of material' column in the annexure?

To track the quantity of materials released Signup and view all the answers

Who is responsible for signing off on the release of materials?

SSE/P.Way Signup and view all the answers

What is the purpose of the 'Remarks' column in the annexure?

To record any abnormalities in the material Signup and view all the answers

What information is required in the 'Period of execution of work' section?

Start and end dates of the project Signup and view all the answers

What is the purpose of the 'Test check' column in the annexure?

To record the results of material testing Signup and view all the answers

What is the purpose of the 'Category' column in the annexure?

To classify the material by type Signup and view all the answers

What is the role of the nominated administrative officer of the Headquarters?

To co-ordinate the proposals received from the divisions Signup and view all the answers

Why is the condition of rail checked before use?

To ensure it meets the standards for track renewals Signup and view all the answers

What happens to rails released from primary relaying?

They are used in sidings or non-passenger running lines in yards Signup and view all the answers

What is the priority decided by the administrative officer based on?

The condition of the track Signup and view all the answers

What happens after the Railway Board's sanction is received?

The arrangements for supply of track materials are made Signup and view all the answers

What is the purpose of ultrasonically testing rails?

To check for defects Signup and view all the answers

What is done to rails in secondary renewals if their condition is satisfactory?

They are cropped and welded into SWR Signup and view all the answers

Who approves the final track renewal proposal?

The Chief Track Engineer/Chief Engineer Signup and view all the answers

Study Notes

Types of Renewals

There are three types of renewals: scattered renewals, casual renewals, and through fitting renewals.
Scattered renewals involve replacing unserviceable rails, sleepers, and fastenings in isolated locations, with a maximum of 10 rails and/or 250 sleepers in a gang beat in a year.
Casual renewals involve replacing unserviceable rails, sleepers, and fastenings with identical sections of serviceable and nearly the same vintage or new track components in isolated locations of continuous but small stretches.
Through fitting renewals involve replacing liners and GRSPs/CGRSPs without replacing ERCs.

Factors Governing Permanent Way Renewal

Criteria for rail renewal include the incidence of rail fractures/failures, wear on rails, maintainability of track to prescribed standards, expected service life in terms of Gross Million Tonnes of traffic carried, and plan-based renewals.
Incidence of rail fractures/failures, particularly in sections with 5 withdrawals of rails per 10 km in a year due to fracture and/or rail flaws detected ultrasonically, takes priority in deciding rail renewals.
Verification of proposals by the Track Cell in the Chief Engineer’s Office involves coordinating proposals, framing programs, deciding priority, and satisfying that the renewal is unavoidable.

Track Standards for Renewals

The recommended section of rail to be adopted for track renewals is in accordance with Para 205.
Rails should be ultrasonically tested before use, and kinked rails must be jim-crowed and straightened.
Punch marks on rails or marking by chisel should be prohibited as they cause incipient failures.

Methods of Carrying out Renewal

Complete track renewal can be carried out by using mechanical equipment or manual methods.
Detailed instructions shall be issued by the Assistant Divisional Engineer regarding the method of relaying, which depends on site conditions and machine availability.

Manual Method of Relaying

The method can be followed for single rail, 3 rail panel, and LWR track.
Precautions described in Para 346 & 347 should be followed for LWR track.
Any modification in the layout of passenger lines should be carried out with the sanction of the Commissioner of Railway Safety.

Relaying Points and Crossings

Particular care should be taken to effect improvements in the lay out while relaying points and crossings.
Renewal should be carried out with standard rail sections, in accordance with standard drawings.
At least one rail length on either side of the turnout should have the same section of rail as the turnout.
References must be fixed for the center line of the new assembly, with accurate fixing of the inter-section point of the turnout track and the main line track.

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This quiz covers different types of railway track maintenance, including renewal operations and their characteristics.