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

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the outlet nozzles. In rocky soils, drilling heads fitted with roller chisels can be used. The pilot bore is steered by controlled rotation of the bevelled steering surface of the drilling head. This surface moves off-line and it can be forced to move off-line in the desired direction by rotating it (Fig. . ). The actual position of the drilling head is detected above the path of the bore by means of radio signals from a transmitter housed in the drilling head. Any deviations from the desired line are corrected by appropriate steered movements. Today, the accuracy of steering is so high that, after being driven for a length of more than 1000 metres, pilot bores can be made to arrive within a target area measuring only a square metre in size. Fig. 5.7 The tool for the first stage of upsizing 5.2.2 The upsized bore or bores A description of the technique Fig. 5. 8 The tool for the second stage of upsizing If the pilot bore needs to be upsized, suitable tools are used to upsize it, in a number of stages, to a diameter suitable for the pulling-in of the medium-carrying pipe. For this purpose, an upsizing head is fitted to the pilot drilling linkage, the size and configuration of this head being governed by the particular soil conditions and the size of the pipe which is subsequently going to be pulled in (Figs. .7 and .8). The upsizing head is pulled through the bore while rotating continuously and in this way it enlarges the size of the pilot bore. The soil which is cut away is carried out with the drilling mud and this latter supports the bore at the same time. The upsizing process is repeated with increasingly large heads until the bore is of the desired inside diameter. 7
The horizontal directional drilling technique 5.2.3 Pulling-in Once the bore has reached its final diameter, the string of pipes can be pulled in. A reaming tool (Fig. .9), then a rotary joint that stops the string of pipes from turning with the reaming tool, and then a traction head matched to the pipes that are going to be pulled in (Fig. .10) are fitted to the drilling linkage which is still in the bore. The traction head is connected to the string of pipes by friction locking and positive locking. The length of the string of pipes depends on local conditions. When the site is very cramped for space, part-strings can be assembled or even single pipes can be installed. When this has to be done, the pulling-in process is stopped after whatever length of string is possible in the given case and another part-string is coupled on. Drilling mud is also pumped through the drilling linkage while the pulling-in is progressing. It emerges from the reaming tool and as it does so carries away the drillings and at the same time lessens the frictional forces. The forces which act on the new string of pipes when it is being pulled in have to be measured and a record has to be kept of them. Fig 5.9 Reaming tool 8 Fig. 5.10 DN 900-BLS ® traction head
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Buderus Ma
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Buderus Ma
Page 6 and 7:
1. Introduction Introduction When t
Page 8 and 9: Buderus Ma
Page 10 and 11: At x 100 magnification, these graph
Page 12 and 13: 10 3 kp cm Fig. 2.7 Steel Ductile G
Page 14 and 15: Fig. 2.11 How the pipes are produce
Page 16 and 17: 2.3 Development in the joint-making
Page 18 and 19: joints is DVGW Arbeitsblatt GW 3 8
Page 20 and 21: Longitudinal force-fit joints and t
Page 22 and 23: Longitudinal force-fit joints and t
Page 24 and 25: 2.3.2 Making the BLS ® joint Makin
Page 26 and 27: Fig. 2.21 Left lock Catch Right loc
Page 28 and 29: 2.4 Inside and outside protection I
Page 30 and 31: Inside and outside protection the c
Page 32 and 33: Reference documents [2.8] Gaebelein
Page 34 and 35: General What is said above is true
Page 36 and 37: 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 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 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
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DN 80 - DN 00 BLS ® joints There m
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Use of clamping ring joints DN 80 -
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Notice on assembly DN 80 - DN 00 BL
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Retrospective application of weldin
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11.2 Installation instructions for
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Inserting the locking segments DN 0
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Angular deflection DN 00 - DN 1000
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Disconnecting BLS ® joint disconne
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Shrink-on devices and protective ta
Page 126 and 127:
ZMU Before a pipe is cut, the ZMU s
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ZMU 127
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129
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Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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