SANS 10120-5 MK-1983 Code of practice for use with standardized specifications for civil engineering construction and contract documents Part 5 Contract administration Section MK K.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. Clause - SABS 0120 : Part 5 Section MK-1983 Kerbing and channelling PART 5 : CONTRACT ADMINISTRATION SECTION MK CONTENTS Page Numbrr START OF CONSTRUCTIO

4、N . 1 General 1 IMMEDIATELY AFTER THE HANDING OVER OF THE SITE . 3 General 1 DURING CONSTRUCTION 1 Methods of Construction . 1 Construction of truly straight and neatly jointed extruded kerbing . 1 Administration . 1 Control of the extrusion of concrete kerbing . 1 Concrete-lined open drains . 1 QUA

5、LITY CONTROL AND OTHER CONSIDERATIONS . 1 9 November 1983 Approved by the COUNCIL OF THE SOUTH AFRICAN BUREAU 08 STANDARDS SABS 0120 : Part 5 section MK-1983 Kerbing and channelling SABS 1200 MK : KERBING AND CHANNELLING NOTE: The clause number(s) given at the beginning or after the heading of a cla

6、use is/are, unless otherwise stated, the number(s) of the relevant clause(s) of SABS 1200 MK. START OF CONSTRUCTION GENERAL. For the purposes of this part of the code, contract administration starts with instructions to the contractor to commence work as set out in Subclause 4 of Section 0. IPWEDIAT

7、ELY AFTER THE HANDING OVER OF THE SITE. The engineer should give immediate attention to all matters necessary to ensure that the start of the contract is not adverse1.y affected by lack of information. In particular, for each curve in the kerbing, he should provide pegs or data from which finished a

8、lignment and levels can be established by the contractor. 3. DURING CONSTRUCTION 3.1 METHODS OF CONSTRUCTION 3.1.1 Construction of Truly Straight and Neatly Jointed Extruded Kerhing (Subclauses 5.4 and 6.1). Forms should be accurately set to line and level and should be firmly held in position durin

9、q the placing of the concrete. In order to achleve this, line and level pegs should be inserted at the following spacings : a) Straight and constant grade 10 m b) Horizontal curves, radii greater than 15 m, and vertical curves 5 m C) Bellmouths, closes, and radll of 15 m and less 2 m Each guide line

10、 should be set accurately to the line and level pegs and sufficient intermediate supports should be provided at intervals not greater than 3 m to give a smooth alignment. On each curve of radius 15 m and less the maximum angular deflection of the line at intermediate supports should be 3 O. Stops at

11、 the ends of sections should be accurately placed to ensure that jolnts between adlacent sections are truly perpendicular to the surface of the concrete and at right angles to the edge of the road. 3.2 ADMINISTRATION 3.2.1 Control of the Extrusion In-Situ of Concrete Kerhlng (Subclauses 4.1 and 5.8.

12、4). It has been reported that the small machines available on the market for the extrusion of concrete kerbs are not capable of placing a concrete mlx wthout leaving air volds in the concrete. If vibration gives proper compaction, the desired shape cannot be achieved, and if the machine is gentle en

13、ough to give a good extrusion lt does not compact the concrete properly. In practice it is very difficult to comply with the requirements of the specification. 3.2.2 Concrete-Lined Open Drains (Subclause 5.6 and 8.2.13). On some soil types it may be necessary to use the more expensive polyethylene s

14、heeting instead of a sprayed bitumen emulsion primer. Payment should be vnrled accordingly where n change is agreed on site. QUALITY CONTROL AND OTHER CONS IDERATIONS Apply the relevant recommendations of SABS 0157) to the construction of precast concrete kerbs, channels, etc. 1) Quality management systems. bs pta