GJBT – 8244：05×101-2
GUOJIJIANZHUBIAOZHUNSHEJI 05×101-2
地下通讯电缆敷设
The Laying of the Underground Communication Wires and Cables
Published by China Architecture Standard Research and Design Institute
GJBT – 8244：05×101-2
The laying of the underground communication wires and cables
Approved by: The Ministry of Construction of the People’s Republic of China Making unit: Wuzhou Engineering Design and Research Institute Implementation on: March 1, 2005 Approval Number: J Z [2005] No.14 The unified number: GJBT – 8244 The atlas number 05X101-2
The principal of the making unit: The technical principal of the making unit: The technical approver: The design principal:
The instruction for the standard making
1. The design rationale
1.1 The document released by the Ministry of Construction: J Z No [2004] 46,
The Notification on Issuing The
Working Plan of the Making of the
National Construction Design Standard of 2004
1.2 The current national and industrial standards and regulations
1.2.1 The Regulation on the Project Design
of the User Lines of the Local Telephone Network, YD5006 – 2003; 1.2.2 The Regulation on the Acceptance and Checking of the Communication
Line Project of the Local Network,
YD5051 – 97; 1.2.3 The Regulation on the Design of the
Communication Pipeline and Channel
Engineering; YD5007 – 2003;
1.2.4 The Technical Regulation on the Construction and Acceptance and Checking of the Communication Pipe
Engineering, YD5103 – 2003;
1.2.5 The Regulation on the Design of the
Communication for the Industrial Enterprises; GBJ42 – 81;
1.2.6 The Regulation on the Design of the
Urban Engineering of the Underground Plastic Pipes for Communication, CECS 165:2004
1.2.7 The Regulation on the Load of the
Construction Structure, GB50009 – 2001;
1.2.8 The Regulation on the Design of the
Marshalling Structure, GB50003 –
2001. 2 The range of application
This atlas is applied in the construction and installation of the outdoor underground communication lines of the civil building and industrial enterprises of the
newly-construction, re-construction and enlargement engineering under the normal
conditions. The construction and installation of the outdoor underground lines of other weak electricity rooms can refer to this atlas. 3. Main content
3.1 This atlas is the revised edition of the atlas
of The Installation of the Underground Communication Lines (94X101 - 2) 3.2 This atlas adds the new content on the
basis of The Installation of the Underground Communication Lines (94X101 - 2) so as to meet the demands in the various engineering. The newly-added content mainly contains the
laying method of the optical cables and the
content dealing with the new-type pipes (double wall wave plastic pipe, silicon chip plastic pipes, grid plastic pipes, cell plastic pipes and multi-hole plastic pipes) and the
small scale manhole. 3.3 The common small scale manhole in the atlas of The Installation of the Underground Communication Lines (94X101 - 2) is kept in
this atlas, and the uncommon large scale manhole is deleted. When such middle and large scale manholes are needed in the
engineering, the constructing method can be referred to in The Atlas of the Manhole and Pipe and Block Group in the Communication
1
Pipes (YDJ - 101).
3.4 For the constructing method of the cable channel， please refer to The Laying of the Cable of 35kv and Lower Voltage (94D101- 5).
3.5 The main content of the atlas 3.5.1 The directly buried cable line
3.5.2 The directly buried optical cable line 3.5.3 The pipe cable line
3.5.4 The pipe optical cable line 4. The selection of the equipments
The cement pipes, steel pipes, PVC pipes, grid plastic pipes, double-wall wave plastic pipes, silicon chip plastic pipes, cell plastic pipes and multi-hole pipes can be selected as the pipelines. When the conditions permit, the PVC pipes, double-wall wave plastic pipes, silicon chip plastic pipes, cell plastic pipes and multi-hole pipes should be used as much as possible. 5. Manhole
5.1 The manholes in this atlas is only applied for the common constructing method in the environment of the types of 2a and 2b, and the requirements in the special conditions such as anti-corrosion and the collapsible loess area, etc. If there are the special conditions, the engineering designing unit will design according to the relative regulations.
5.2 This atlas is applied in the area with the seismic intensity of 7.
5.3 On the designed manhole, the casing soil (excluding the small scale manhole) is 400 – 800, and the living load is level -20.
5.4 The manhole can be divided into three kinds according to the waterproof level:
Water Fundus – Fundus 0.5 Fundus over level below – 1.0m
0.5m
1.0m
Type of Common Anti-damp Waterproofthe sap
5.5 Material
The intensity level of the bricks: MU10
The intensity level of the mortar: refer to the
GJBT – 8244：05×101-2
detailed drawing
The intensity level of the reinforced concrete: C30
The steel bar: HPB235(Q235); HRB335(20mMnSi)
The steel bar protective layer: 25
The cement used in the cushion coat: C15
5.6 The holes should be opened at the side walls of the manhole, the sizes and standard height should be determined by the engineering design. When the distance between the top of the hole and the bottom of the board h is less than the width of the hole (A or B), the lintel (A or B) should be added. 5.7 There are two kinds of diameters of the holes on the cover, D=800 and D=710, the selection of the diameter should be determined by the engineering design.
5.8 The feature value of the bearing capacity of the foundation is 130 kPa, and the coefficient of compaction of the foundation should be larger than 0.94.
5.9 The amount of the pipes accommodated by the manholes
Type
The maximum amount of the accommodated pipes (hole) Standard pipe The multi-hole (the diameter is
pipe (the 90 mm)
diameter is 28 mm to 32 mm)
The small scale 18 54 manhole The hand hole4
12
The small scale 2 6 hand hole
6 Other indications
6.1 All the iron components in the atlas should be galvanized.
6.2 Besides special indication, all the unit of the size in the atlas are mm.
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05X101-2《地下通讯电缆敷设》
