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

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Other pluses that the two techniques have are these: General • There is no need for public-transport bus stops to be moved (see Fig. 3.3). • There is almost no interference with delivery traffic in streets where there are business premises. • Other utilities carried in pipes are not put at risk by excavation work. • Depending on the machinery used, whose maximum sound emission is less than . dB(A), the installation work is particularly „quiet“ and free of dust. It is even possible for work in residential areas to continue without any overnight breaks. Above all when installation work is being done in inner city areas, where there are very closely packed runs of pipe, intersecting pipelines and pipelines running in parallel are very much at risk when heavy-duty digging equipment is used in open trenches. This risk is cut to a minimum when trenchless replacement techniques are employed. The two techniques can both be used for supply pipelines of nominal sizes ranging from DN 80 to DN 00. What are required are: • a machine pit to hold the machinery, • an installation pit (about 7 metres long) for the new pipes, • intermediate pits for the house connections or branch pipelines. The distance between the intermediate pits depends on the nominal size of the old pipeline and on the condition it is in, on the nominal size of the new pipeline, on the machinery used, on the nature of the soil, on the trees present and their roots and of course on the conditions relating to traffic and the medium involved. Depending on the technique and the locality, the distance between the intermediate pits should not be more than 2 to 0 metres. With a straight run of pipes or one with a radius of curvature of not more than 170 metres, the distance between the launch and arrival pits is normally from 100 to 180 metres. Before the replacement operation, the old pipeline has to be taken out of service. The supply of the adjacent houses and other premises is maintained through temporary interim pipelines, the water from which is fed into the house connecting pipes, the ends of which have been closed off, in the pits for the house connections. 3
Trenchless replacement of gas and water pipelines 3.1 The press-pull technique With this technique, the old pipe is pressed onto a breaker cone and shattered and is removed from the machine pit in fragments. The new pipes, which have longitudinal force-fit restrained joints – e.g. <strong>Buderus</strong> BLS ® joints – are hooked on at the end of the last old pipe by means of a traction head and are pulled into the cavity which is left free. The two steps take place simultaneously. Once the pits required have been dug and lined, the sections of old pipeline contained in them are cut out and removed. Specially prepared launch/assembly pits make it easier for the pipes to be installed and stop any fouling or contaminants from getting it (Fig. 3. ). First of all, a traction linkage which can be coupled together is pushed through the old pipeline and anchored to an adjusting adapter at the end of the old pipeline, thus allowing the old pipes to be pressed out of the earth in the course of the replacement operation. No fragments are left in the bedding zone for the new pipeline. The new pipes are fastened to the adjusting adapter and, as the old pipe is pushed out, they are pulled in behind it at the same time. 3 Fig. 3.4 A DN 150 pipe in the pull-in pit
Page 1 and 2: Buderus Ma
Page 6 and 7: 1. Introduction Introduction When t
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 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 88 and 89:
In the second step, the pilot is up
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8.3 Outside protection Outside prot
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8.6 Reference documents [8.1] Richt
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A consideration of the economics of
Page 96 and 97:
A consideration of the economics of
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[9.2] DVGW-Hinweis W 09: Auswirkung
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BLS ® restrained joint DN 80 to DN
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Technical data sheets 101
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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
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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131
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Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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