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

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A prerequisite for this procedure is sufficient space for a complete pipe string, or partstrings situated next to one another, to be assembled. A disadvantage is the total weight of the pipe string, which increases the tractive forces required due to the friction of the string against the ground on which it is resting. This friction can be reduced by, for example, sheets of metal greased with lubricant on which the string is assembled or by inflated rubber rollers. If there are water-filled channels available, the string can float in them (Fig. . ). Generally speaking, it has to be said that the pulling-in of a complete string (Fig. .1) destroys the advantage of the point sites which are used in trenchless installation techniques. Basically, this is true no matter what the material of which the pipes are made. The pulling-in of single pipes is particulary suitable for point sites but normally cannot be used for pipes which have to be joined together into strings by welding because the time taken by the welding and cooling and by the testing of the welds is too long. The inevitable consequence is that the drilling mud solidifies due to thixotropy. Fig. 5.11 General diagram of an assembly pit 7 - 8 m Allgemeine Anforderungen This is where the advantage of the BLS ® joint lies. The time taken to assemble the <strong>Buderus</strong> BLS ® joint is short and is similar to the time required to remove the traction rod at the machine end (see Table 2. in section 2). This gives ductile cast iron pipes with BLS ® joints an unbeatable lead over pipes of other materials, with the possible exception of PE pipes supplied in coils. The space required at the end from which the pipeline is pulled in is only slightly more than the length of a pipe. Launch pits seven to eight metres in length are generally all that are required (Fig. .11), or else the pipes are joined together on an assembly ramp. A point site is possible with these latter pipes. There are no forces generated by friction on the ground below which have to be allowed for and in general the next smaller size of machine can even be used, which 1
The horizontal directional drilling technique is another thing which has beneficial effects on cost. The connecting together of single pipes on a ramp also has the advantage that the work can be done at eye level, virtually under workshop conditions, which is important from an ergonomic point of view (Fig. .12). Another inestimable advantage with regard to drinking water hygiene and the subsequent release that is required is that the assembly of the joints on a ramp takes place some distance away from any dirt and mud. 2 Fig. 5.12 Assembly ramp Fig. 5.13 cement mortar protecting sleeve with a sheet-metal cone It is clear that the gain in speed with the variant procedure described above must not be lost again by the application of a heat-shrink sleeve. This is where the cement mortar protecting sleeve serves its purpose. It can be quickly and easily rolled on and it has a sheet-metal cone to protect it against the unknown roughnesses which may be present in the bore. This cone is slid over the socket of the pipe, together with the cement mortar protecting sleeve, before the joint is assembled. Once the joint has been assembled, it is moved into position (Fig. .13) and folded in at the edge if required.
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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 58 and 59: the outlet nozzles. In rocky soils,
Page 60 and 61: 5.3 General requirements Companies
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
Page 108 and 109: DN 80 - DN 00 BLS ® joints There m
Page 110 and 111: 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
Page 116 and 117:
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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