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. SABS 01 20-2 Section DK:1996 Gabions and pitching First revision Part 2 : Project specification, Portion 2 Section DK Contents Page 1 Essential project s
4、pecification clauses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Essentialdata 1 3 Additionalclauses . 1 3.1 General . 1 3.2 Normalprojects . 1 3.2.1 Unweatheredstone 1 3.2.2 Characteristics of geotextile . . .
5、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.2.3 Testsonlacing . 2 3.3 Prestigeprojects 2 3.4 Labour-basedprojects 2 This section of the code supersedes SABS 01 20-2 : Section DK:1984 Approved by the PRESIDENT OF T
6、HE SOUTH AFRICAN BUREAU OF STANDARDS CODE OF PRACTICE SABS 0120-2 : Section DK:1996 SABS 1200 DK : Gabions and pitching NOTES 1 Number the PSDK clauses in portion 2 of the project specification in the sequence in which the clauses to which they relate appear in SABS 1200 DK. 2 The clause number) giv
7、en in brackets at the beginning or after the heading of a clause islare, unless otherwise stated, the number(s) of the relevant clause(s) of SAW 1200 DK. 1 Essential project specification clauses Set out suitable clauses in portion 2 of the project specification to provide essential information, as
8、follows: a) (3.1.3) Where a gsotextile is to be used, specify the minimum thickness, and other requirements with which it must comply (see also 3.2.2 below). b) (3.1.4) Where a geomembrane is to be used, state whether it is to be resistant to ultraviolet light and, if applicable, specify other requi
9、rements as listed in appendix B of SABS 952). c) (8.2.7) Where weepholes are required in pitching, specify the details of their construction and location. 2 Essential data The availability of certain essential data might affect the prices tendered. Except where such data have been given in the sched
10、ule or on the tender drawings, set out suitable clauses covering items such as the following in portion 2 of the project specification : (3.1 .l) State whether stone is to be subjected to the weathering test or to the durability test, or to both (see also 3.2.1 below). (3.1.2) State (or show on the
11、drawings) the required dimensions of the gabion cages. Where so required, state that PVC-coated wire is to be used for the manufacture of gabion cages. (3.2.1.2) State in the terms used in column 1 of table 2 of SABS 1200 DK, the size/mass of pitching to be constructed. (5.3.1) Where pitching is to
12、be backed, specify the thickness of the backing. (5.3.4 and 5.3.5) Designate the areas in which wired pitching or grouted wired pitching is to be used, if applicable. (6.1) Where a degree of accuracy other than Degree of Accuracy II is required, set out the details. (8.2.3 and 8.2.4 and see also 1.3
13、5 of section DK of SABS 0120-3). Where appropriate, include in the project specification requirements to amplify those covering scheduled items. Additional clauses 3.1 General Where it is necessary to amplify or otherwise to vary the terms of SABS 1200 DK to render them suitable for use in projects
14、 to be carried out in particular locations or under particular circumstances, include in portion 2 of the project specification clauses dealing with matters other than those covered by clauses 1 and 2 above. (See also 1.3 of section DK of SABS 0120-3.) 3.2 Normal projects NOTE - To meet requirements
15、 imposed by various norms of economic development, projects are classified as normal, prestige, subeconomic, and labour-based projects (see clause 4 of the Introduction to SABS 0120-3). 3.2.1 Unweathered stone (3.1 .l .l, 7.3 and 7.4) As gabions and stone pitching are both used in situations subject
16、 to erosion, it is particularly important that the stone used be resistant to weathering. However, the carrying out of tests on stone of the size normally used for gabions and pitching could present problems in the laboratory. Provision has been made in 7.3 and 7.4 of SABS 1200 DK for one or two tes
17、ts (depending on the type of stone) to be carried out on a sample drawn from the quarry in which material to be used is prepared. Should neither of these tests be considered suitable for the particular circumstances or should they be considered inadequate by the engineer, set out in the project spec
18、ification a suitable test or modifications of one or both of the tests. 1 ) Polyethylene sheet. SABS 0128-2 Section DK:l996 Gabions and pitching First revision 3.2.2 Characteristics of geotextile (3.1.3) Where the engineer is uncertain as to the properties of a geotextile that will best suit his par
19、ticular application, he may include a project specification clause such as PSDK 1 .l below but in doing so, he should bear in mind the contractors problems of pricing an ill-defined requirement. PSDK 1 .l Final selection of geotextile (3.1.3) The Engineer reserves the right to conduct field tests to
20、 determine the suitability of the geotextiles for specific applications and to base his final selection on these results. 3.2.3 Tests on lacing (7.5) See 1.3.1.2 and 2.4 of section DK of SABS 0120-3. 3.3 Prestige projects See 3.1.3(b) of section DK of SABS 0120-5. 3.4 Labour-based projects SABS 1200 DK covers mainly labour-based operations and is therefore particularly suitable for application to labour- based projects. sabs pta
