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

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Fig. 5.3 Assembly of the string of DN 900 pipes in a floodable trench Fig. 5.4 The string of DN 900 pipes floating in the trench when flooded General After this satisfactory experience, development went ahead at a very rapid pace: In 199 the pipes were of DN 00 size [ .2] (Figs. .1 and .2), in 2000 the bar was raised to DN 00 [ .3] and in 2003 DN 700 pipes were pulled in by the horizontal directional drilling technique in the Netherlands [ . ]. The current record – held by <strong>Buderus</strong> Giesserei Wetzlar GmbH pipes with BLS ® joints and ZMU – is approximately 00 metres of DN 900 pipes in Valencia in Spain (Figs. .3 to . ). In parallel with this the DVGW was developing technical rules for the technique, and these took the form of Arbeitsblatt GW 321 Steuerbare horizontale Spülbohrverfahren für Gas- und Wasserrohrleitungen – Anforderungen, Gütesicherung und Prüfung [Steerable horizontal directional drilling methods for gas and water pipelines – Requirements, quality assurance and testing], which was published in October 2003 [ . ]. Fig. 5.5 Beginning of the pulling-in with a barrel reamer ahead of the string of pipes
The horizontal directional drilling technique 5.2 A description of the technique The steerable horizontal directional drilling technique (HDD), which will be referred to below simply as the directional drilling technique, is the most widely used trenchless technique for installing new pressure pipelines for gas and water supply. DVGW Arbeitsblatt GW 321 gives rules relating to requirements, quality assurance and testing for it to ensure that quality is properly assured. The sequence of operations in the directional drilling technique is generally divided into the following three successive steps: • a pilot bore • an upsized bore or bores • pulling-in 5.2.1 The pilot bore This is the first step in producing a bore, running from the starting point to the arrival pit, into which the string of pipes can be pulled. The pilot bore is driven under steered control by a drilling head at the tip of a drilling string. Emerging at high pressure from the drilling head as it drives is an aqueous suspension of bentonite, the so-called drilling mud, which is pumped through the drilling string to the drilling head by the drilling machine. The drilling mud serves both to carry away the material which is cut away and to support the bore. There are different designs of drilling heads for all types of soil. In sandy soils, all that is generally needed for detaching and carrying away the cuttings are Fig. 5.6 Drilling head for the pilot bore
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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 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 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
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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
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ZMU Before a pipe is cut, the ZMU s
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ZMU 127
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Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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