Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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8.3 Outside protection Outside protection, joints, other points With this technique, the outside protection of the ductile cast iron pipes consists of plastic-modified cement mortar (ZMU) to DIN EN 1 2. The joint area has to be protected with a shrink-on sleeve. Shrink-on sleeves of tape material should not be used in this case. 8.4 Joints Because the pipe for medium is pulled in by steered pilot boring, BLS ® joint also has to be used in this case. The permitted tractive forces and operating pressures for the BLS ® joint are shown in Table 2.1 in section 2. However, due to the oversize, the tractive forces which can be expected will not be excessively high. 8.5 Other points The individual sections of the pipeline can be connected together in the conventional way in the assembly pits (which were previously the arrival and pull-in pits) using standard fittings. For pipelines connected entirely by longitudinal force-fit joints, BLS ® collars conforming to a factory standard are available (Fig. 8.7). For pressure tests, the sections are sealed off with thrust-locked fittings from the BLS ® range (Fig. 8.8, 8.9 and 8.10). There is thus no need for the end pieces to be supported on the pit lining. At 20 millimetres, the outside diameter of the casing pipe is so adjusted that there is a small oversize for the 20 millimetre sockets of the cast iron pipes. The outside diameter of the main body of the cast iron pipes, including the cement mortar coating, is approx. 33 millimetres. Fig. 8.7 BLS ® collar Fig. 8.8 BLS ® flanged socket 89
The steered pilot bore technique The approximately 0 mm wide annular gap which this leaves fills up on its own if the soil is of a suitable type. So far, there have not been adverse effects on the ground surface due to settling. The technique is fully developed in technical terms. It combines the well known steered pilot boring technique which has proved its worth in the field of sewage pipe installation with the technique of pulling in ductile cast iron pipes with longitudinal force-fit restrained joints. There is only a small amount of interference with traffic and the environment. This technique is proving to be very economical and the reasons for this are the short installation times, the saving on below-ground work, such for example as the lining of pipe trenches, the temporary storage of soil, and transport to and from the site, the kindliness to any adjacent infrastructure, and the low-emission nature of the installation work. 90 Fig. 8.9 BLS ® flanged spigot Fig. 8.10 BLS ® plug
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Buderus Ma
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Buderus Ma
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1. Introduction Introduction When t
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Buderus Ma
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At x 100 magnification, these graph
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10 3 kp cm Fig. 2.7 Steel Ductile G
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Fig. 2.11 How the pipes are produce
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2.3 Development in the joint-making
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joints is DVGW Arbeitsblatt GW 3 8
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Longitudinal force-fit joints and t
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Longitudinal force-fit joints and t
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2.3.2 Making the BLS ® joint Makin
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Fig. 2.21 Left lock Catch Right loc
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2.4 Inside and outside protection I
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Inside and outside protection the c
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Reference documents [2.8] Gaebelein
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General What is said above is true
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Other pluses that the two technique
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Fig. 3.5 Hydraulic unit The press-p
Page 40 and 41: 3.2 The auxiliary pipe technique Th
Page 42 and 43: In the final stage of the operation
Page 44 and 45: 3.4 Requirements for the site Requi
Page 46 and 47: Reference documents
Page 48 and 49: Both the variants of the burst lini
Page 50 and 51: During the pulling process, the tra
Page 52 and 53: 4.3.2 Joints As in virtually all tr
Page 54 and 55: Reference documents 3
Page 56 and 57: Fig. 5.3 Assembly of the string of
Page 58 and 59: the outlet nozzles. In rocky soils,
Page 60 and 61: 5.3 General requirements Companies
Page 62 and 63: A prerequisite for this procedure i
Page 64 and 65: Table .1 provides an overview of th
Page 66 and 67: Installations Nominal size DN lengt
Page 68 and 69: Reference documents [ . ] DVGW Arbe
Page 70 and 71: Fig. 6.2 Traction vehicle Fig. 6.3
Page 72 and 73: 6.4 Joints The longitudinal force-f
Page 74 and 75: Areas of application, advantages an
Page 76 and 77: Reference documents 7
Page 78 and 79: 7. 2 A description of the technique
Page 80 and 81: Buderus Giesserei
Page 82 and 83: Fig. 7.8 Pushing in a pipe A descri
Page 84 and 85: 7.5 Reference installations No. Loc
Page 86 and 87: [7. ] Rink, W.: Langrohrrelining mi
Page 88 and 89: In the second step, the pilot is up
Page 92 and 93: 8.6 Reference documents [8.1] Richt
Page 94 and 95: A consideration of the economics of
Page 96 and 97: A consideration of the economics of
Page 98 and 99: [9.2] DVGW-Hinweis W 09: Auswirkung
Page 100 and 101: BLS ® restrained joint DN 80 to DN
Page 102 and 103: Technical data sheets 101
Page 104 and 105: General Pipes must not be: • drop
Page 106 and 107: Filling in the pipe pit DN 80 - DN
Page 108 and 109: DN 80 - DN 00 BLS ® joints There m
Page 110 and 111: Use of clamping ring joints DN 80 -
Page 112 and 113: Notice on assembly DN 80 - DN 00 BL
Page 114 and 115: Retrospective application of weldin
Page 116 and 117: 11.2 Installation instructions for
Page 118 and 119: Inserting the locking segments DN 0
Page 120 and 121: Angular deflection DN 00 - DN 1000
Page 122 and 123: Disconnecting BLS ® joint disconne
Page 124 and 125: Shrink-on devices and protective ta
Page 126 and 127: ZMU Before a pipe is cut, the ZMU s
Page 128 and 129: ZMU 127
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Page 132 and 133: 131
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Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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