SANS 10120-5 MJ-1984 Code of practice for use with standardized specifications for civil engineering construction and contract documents Part 5 Contract administration Section MJ S.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. SA95 0120 : Part 5 Section MJ-1984 Segmented paving PART 5 : CONTRACT ADMINISTRATION SECTION M3 CONTENTS Clause Page Number START OF CONSTRUCTION . 1 Gen

4、eral . 1 IMMEDIATELY AFTER THE HANDING OVER OF THE SITE 1 Site Preparation . 1 Evidence of Suitability of Local Sands . 1 DURING CONSTRUCTION . 1 Method of Construction . 1 Tolerances applicable to top of subbase . 1 Laying of units 1 Administration 1 Subsoil drainage 1 Subbase/foundation layer 1 Lo

5、cal sand 1 Inspection of units . 1 QUALITY CONTROL AND OTHER CONSIDERATIONS 1 Quality Control 1 November 1984 Approved by the COUNCIL OF THE SOUTH AFRICAN BUREAU OF STANDARDS SABS 0120 : Part 5 Section MJ-1984 Segmented paving SABS l200 MJ : SEGMENTED PAVING NOTE: The clause number(s) given at the b

6、eginning or after the heading of a clause is/are, unless otherwise stated, the number(s) of the relevant clause(s) of SABS l200 MJ. 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

7、 in Subclause 4.1 of Section 0. IMMEDIATELY AFTER THE HANDING OVER OF THE SITE SITE PREPARATION. Preparation of the site and the laying of the paving are frequently carried out by different parties. In order to avoid claims for delay, action should be taken tilaeously as follows to ensure that the r

8、equirements of 3.2.1 and 3.2.3 below have been complied with: (a) By the engineer responsible for both contracts, where the preparation of the site before paving is to be done by others under another contract; or (b) By the contractor, in order to avoid delays during the laying and to avoid rejectio

9、n on completion where the contractor is responsible for both preparation and laying. EVIDENCE OF SUITABILITY OF M)CAL SANDS (Subclause 3.3). Where applicable, the contractor should prcduce, as early as possible, evidence of satisfactory previous use or the results of tests that show that particular

10、local sands (including mine sand) are satisfactory. To expedite the contract and to avoid a claim for extra payment on account of delays caused by indecision (see 3.2.3 below), the engineer should not unduly delay approval of the use of such sands. DURING CONSTRUCTION METHOD OF CONSTRUCTION Toleranc

11、es Applicable to Top of Subbase (Subclauses 6.1 and 6.2). The contractor and the engineer should take particular note that the tolerance requirements for a subbase that is to receive segmented paving are tighter than those for a foundation layer in terms of SABS 1200 D) or SABS l200 DA), for subbase

12、 in terms of SABS l200 ME3) or for subgrade in terms of SaBS 1200 DM). Both parties should ensure adherence to the applicable tolerances. (See also Subclause 3.2.2 of Section W of Part 2 and Subclause 1.3.4 of Section MJ of Part 3 of the code.) Laying of Units. The procedures for laying precast conc

13、rete paving blocks that are recosmended by the Concrete Masonry ssociation) should be followed in the construction of all segmented pavements. ADMINISTRATION Subsoil Drainage (Subclause 5.1). The engineer or the contractor, as appropriate (see 2.1 above), should ensure that subsoil drainage has been

14、 properly completed over the area to be paved, and that all trenches have been backfilled and adequately compacted before the subbase and other foundation layers are completed. Subbase/Foundation Layer (Subclause 5.1). In addition to ensuring proper construction and compaction of the subbase/foundat

15、ion layer the engineer or the contractor, or both, as appropriate, should verify that the grading is such that water cannot pond under the completed paving. (See also 3.1.1 above.) Local Sand (Subclause 3.3 and see also 2.2 above and Sclause 1.3.2 of Section W of Part 3 of the code.) The engineer sh

16、ould designate the source of acceptable sand or, when applicable, give early approval for the use of sand from a souce that the contractor proposes to use. Where doubt exiits, the engineer should consult the NITRR before giving approval. Inspection of Units (Subclause 3.1.1). Surface hairline cracks

17、 may occur in the process of manufacture of blocks but do not adversely affect performance or durability. Godl quality paving blocks may also be chipped or slightly damaged during handling without their perfor- mance being adversely affected. QUALITY CONTROL AND OTHER CONSIDERATIONS QUALITY CONTROL. See 3.1.1 above. 11 Earthwork. 2) Earthworks (mall works). 3) Subbase. 4) Earthworks (roads, subgrade). 5) Recotmendations are given in the Laying manual and Guidelines, each published by the Concrete Masoruy Association in 1982.