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南非土木工程施工标准 NB:铁路专用线（轨道工程） 英文原文节选 20100079 1-42 |
CONSTKUCTTON
P KECAUT LONS
Safety.
5.4 of SABS 1200 AA, as applicable, and in order to protect l i f e and property when working or when
handling equipment or material on or near running lines, the Contractor shall take all precautions
necessary Lo keep personnel, plant, and materials outside the space defined by the fixed s t r u c t u r e
gauge (see Drawings NU-2 and NB-3), except that, when work is being carried out under occupation
conditions (see 2.3). personnel and plant may be within the said space.
When trucks loaded with PWM are handled, r a i l transporters, whether moved manually or mechanically, s h a l l
be propelled not f a s t e r than 6 km/h on sidings o� length less than 600 m.
Clearances.
stock and a11 structures and other fixed objects adjacent to the siding in accordance with the relevant
requirenients of 5.2.1 and Drawings NB-2 and NB-3.
Private Siding Agreement.
enter into a private siding agreement with the local System Nanager of the SAR prior to the commencement
of construction.
METHODS AND PK0CEI)UKES
Permanent Way Construct ion Standards. The permanent way shall be constructed in accordance w i tli the
d e t a i l s shown on the siding plan approved in t e r m s of 5.1.3, other applicable requirements of the
specification, and the requirements of the SAR.
The Contractor shall ensure that he and his workmen are familiar with the SAK'S Permanent way instruck
2 ) ;
Setting Out. In terms of Subclause 5.1.1 of SABS 1200 A or SABS 1200 AA, as applicable, the Engineer
w i l l place pegs on the centre line of s t r a i g h t s and a t each PI. BC, and EC, and the Contractor shall be
responsible f o r the detailed s e t t i n g out of tracks and the provision of lift. pegs.
Supervision.
permanent way experience and is a qualified platelayer, and trackwork shall be carried out only under
the personal supervision of the supervisor.
The Engineer nay stop the work a t any time i f such a supervisor has not been appointed by the Contractor
or is not available on Site.
In addition to complying with the requirements of Subclause 5.7 of SABS 1200 A or Subclause
A railway siding shall be so constructed as to aiford standard clearance between r o l l i n g
The Employer w i l l obtain the SAK's approval of the siding plan and w i l l
standard permanent way drawings; and the SAR's Specifications E 73) and E 104). --
The Contractor shall appoint a competent and experienced supervisor who has adequate
Laying of Sleepers
General.
sleepers shall be as shown on Drawing NB-4. Welded j o i n t s shall be so located that they do not
Sleepers shall be laid square to the rails and properly bedded. The nominal spacing of
i n t e r f e r e with sleeper spacing.
A11 sleeper f i t t i n g s shall be kept clean while platelaying is in progress. Spring c l i p s , where used,
shall be f i t t e d i n an approved manner. Coach screw threads shall be dipped in creosote before the
coach screws are screwed down, and T-bolt threads shall be suitably lubricated before the bolts are
tightened. Unless otherwise directed, the torque applied when sleeper fastenings are tightened shall
be 340 +20 N.m.
Wood sleepers. Holes
for coach screws, of diameter 13 mm f o r softwood and 17 mm for hardwood. shall be bored through the
sleeper and square to the upper surface of the sleeper.
Durable wood Laper plugs or dowels of length 25 mm shall be inserted and driven to the bottom of the
holes which shall be f i l l e d with creosote before the coach screws are screwed home.
If a coach screw is drawn from a sleeper and the hole is not to be re-used, the hole shall be plugged
at once with a durable wood taper plug dipped in creosote or tar.
Steel sleepers. Steel sleepers that show signs of obvious damage shall not be used. C l i p b o l t s s h a l l
be lubricated w i t h an approved lubricant before they are tightened, but the c l i p and rail flange shall
be kept free of a l l lubricant. A l l c l i p bolts shall be fitLed with spring washers unless otherwise
directed. The s l e e p e r / c l i p combination shall be such that the finished trackwork is laid to the gauge
required in terms of 5.2.7.
Concrete sleepers. No concrete sleeper shall be used i f it shows any defect or sign of f a i l u r e of the
concrete, or i f the seat or shoulder to receive the rail or soleplate is damaged f o r more than a
quarter of its length in any direction. Surfaces of concrete sleepers, soleplates, and chairs, and the
surfaces of r a i l s that bed on rubber pads shall be brushed and cleaned immediately before rail laying.
Kubber pads shall be thoroughly cleaned and, while the r a i l is being l a i d , they shall be accurately
positioned. Pads that show signs of d i s t o r t i o n . e i t h e r during or a i t e r platelaying, shall be removed
and r e f i t t e d correctly.
Concrete sleepers that are damaged because the f i t t i n g s were incorrectly assembled or were not kept
clean, shall be removed from the track and from the S i t e of the Works.
Straightening and Bending of Rails
Before placing r a i l s on sleepers and before bending them Tor use in a curve, the Contractor shall
remove a l l kinks in the r a i l s . During each bending operation the r a i l shall be so supported on r o l l e r s
that it is f r e e to move. Bending may be done with a j i m crow or by means of any other approved bending
machine.
R a i l bending shall be carried out only when the r a i l temperature is greater than 5 OC.
A rail of length 18 m or less that is bent for use in a curve shall be curved over the f u l l length.
A rail of length greater than 18 m shall be curved over 6 ni at both ends for a curve of radius greater
than 500 m, and throughout its length for a curve of radius 500 m and less.
Subject to the provisions of 5.2.5.2, curved track r a i l s s h a l l be uniformlv bent in accordance with
the standard o f f s e t f o r the length of rail used and the radius of the curve.
Hardwood sleepers shall be laid with the heart down on the -- prepared formation.
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2) Permanent Way Instructions, published by the Chief Civil Engineer, SAR. Johannesburg.
3) E 7 : Specification for works on, over, under or adjacent to a railway line.
4) E 10 : Specification for platelaying and ballasting.原件下载： 
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