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

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In the second step, the pilot is upsized by pressing in protective steel casing pipes with an outside diameter of 20 millimetres (Fig. 8.2). Together with the steel casing pipes, the lengths of pipe in the pilot bore are pushed to the arrival pit, disconnected there and recovered. The soil that is dug out as the bore is upsized is fed back to the launch pit by a feed auger which is in one metre long sections. In the launch pit the soil is collected in a bin, raised to the surface with the site hoist and collected in containers to be taken away (Fig. 8.3) 2. Pressing in the casing pipe Bohrtec BM 00 Launch pit Excavated soil Feed auger Fig. 8.3 Step 2: Pressing in the casing pipe Surface of ground 20 mm dia. casing pipe plus hoses for betonite A description of the technique Fig. 8.2 Lowering the casing pipe Arrival pit 87
The steered pilot bore technique In the third step of the operation, the first DN 300 ductile cast iron pipe for medium with BLS ® joints is lowered into the arrival pit (Fig. 8. ) and coupled to the traction head on the front casing pipe. The casing pipes, which are connected by longitudinal force-fit joints, are now pulled back to the launch pit; there they are recovered together with the feed auger. It takes next to no time for all the other pipes for medium to be coupled onto the pipe that has already been pulled in (Figs. 8. and 8. ). The traction head carries equipment for measuring the tractive force; this is used to measure the pulling-in forces acting on the string of pipes and, later on, to document them in a print-out. Fig. 8.4 Step 3: Pulling-in of the pipes for medium 88 2. Pressing in the casing pipe Bohrtec BM 00 Launch pit Surface of ground 20 mm dia. casing pipe Traction head & equipment for measuring tractive force Fig. 8.5 Lowering a pipe into the arrival pit DN 300 ductile cast iron pipes The casing pipes and pipes for medium must be fitted with longitudinal force-fit joints Fig. 8.6 Coupling on a fresh pipe Arrival pit
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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
Page 32 and 33:
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
Page 38 and 39: 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 90 and 91: 8.3 Outside protection Outside prot
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
Page 130 and 131: 129
Page 132 and 133: 131
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Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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