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WO2008052612A1 - Procédé de pose d'une tuyauterie - Google Patents

Procédé de pose d'une tuyauterie Download PDF

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Publication number
WO2008052612A1
WO2008052612A1 PCT/EP2007/007606 EP2007007606W WO2008052612A1 WO 2008052612 A1 WO2008052612 A1 WO 2008052612A1 EP 2007007606 W EP2007007606 W EP 2007007606W WO 2008052612 A1 WO2008052612 A1 WO 2008052612A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
trench
pipeline
welding
pipe string
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2007/007606
Other languages
German (de)
English (en)
Inventor
Hans Jürgen JOHN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2008052612A1 publication Critical patent/WO2008052612A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
    • F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length

Definitions

  • the present invention relates to a method for laying a pipeline composed of a plurality of separate pipe sections at a subterranean pipeline level along a pipeline route, comprising the steps:
  • Such methods are used, for example, to lay pipelines over land.
  • a working strip of about 20 to 22 m width.
  • the topsoil is cleared to the side in the working strip.
  • the individual pipe sections of the pipeline to be laid are then laid out in the working strip.
  • one or more mobile welding stations are set up in the area of the strip, in which the pipe sections are welded together to produce the complete pipeline on site. This welding process takes place within the
  • the welding station is moved along the pipeline route according to the construction progress, so that the pipe sections can be welded in each case at the intended installation location.
  • the excavated soil is reduced down to the desired level performed.
  • the tubing string is lifted into the excavated trench.
  • the soil filling is made, the topsoil reapplied and made a reclamation.
  • the present invention is therefore based on the task to improve the method for laying pipelines of the type mentioned in that the environment and agriculture are disturbed by the piping as little as possible, yet pipes can be made and laid over several kilometers.
  • This object is achieved according to the invention by welding in a method of the type mentioned stationary and the pipe string is introduced from the stationary welding station in the trench.
  • the pipe string is introduced from an excavation into the trench. This process steps is particularly advantageous if the welding takes place in a pit.
  • the pipe string is driven by thrust by means of a pusher.
  • the pusher can be arranged together with a welding station in a pit. The force required for the propulsion on the pipe string is then applied from this excavation, without further devices along the route are needed.
  • the pipe string is introduced by train into the trench, in particular by pulling by means of at least one driven in a Vortriebsbaugrube pulling device.
  • the pulling device can typically be attached to the tube tip of the
  • Pipe line which is to be driven, be recognized. Ropes, chains and or tie rods have proven to be particularly suitable pulling devices.
  • the pipe string is guided during introduction in an embodiment of the method according to the invention, in particular, the pipe string is guided or driven by drivable transport rollers.
  • the transport rollers may in particular be present on the tubular sole, ie at the bottom of the trench.
  • As a drive for the transport rollers are electric or hydraulic drives.
  • Another embodiment of the method according to the invention provides that the pipe string is lubricated during introduction. By this measure, the frictional resistance of the pipe string is reduced during propulsion.
  • all known lubricants can be used which do not attack the material of which the tubing string is made. For example, silt or clay dispersion can be used. Such lubricants are ecological and safe for agriculture.
  • the frictional resistance during propulsion can also be reduced by weight-relieving the pipe string during introduction.
  • the pipe string can be hung, for example, on a portal.
  • Piping, z. B. over several kilometers, is proposed in a further advantageous embodiment, that the pipe string is driven during introduction at several points. This measure is particularly useful whenever the friction of the pipe string is particularly large due to the nature of the soil.
  • reaction forces are intercepted stationary during insertion.
  • Mobile units can thus be dispensed with.
  • a synchronization of the drives during introduction of the pipe string is provided.
  • the tubing string is sealed during insertion at at least one point for trenching.
  • the pipe opening can be closed with a plastic lid in order to avoid that the interior of the pipe is contaminated during insertion.
  • the excavation pit is excavated as a starting excavation whose extension in the direction of the pipeline route is substantially the length of a separate pipe section plus a working length required for carrying out the welding; along the pipeline route, in addition to the starting excavation pit, at least one separate excavation excavation pit is excavated, which is spaced from the starting excavation pit and, if several excavation excavation basins are excavated, to adjacent propulsion excavation basins; in each case between two construction pits, a trench with a tubular sole is excavated along the pipeline route by tube excavation; the pipeline is successively lowered into sections of separate pipe sections in the starting pit; Each pipe section is welded to the previously lowered pipe section in the starting pit to a pipe string and then propelled into the trench.
  • the main advantage of this variant of the method according to the invention over the conventional method is that in comparison to the conventional method only a minimal excavation and only minimal surface usage is required.
  • only a starting excavation pit and a driving excavation pit are needed.
  • the welding process can be carried out in a single welding station. Carrying a welding station following the progress of pipeline construction, as in the conventional method, thus eliminates with great advantage. Rather, according to the invention, a single welding station can be installed in the appropriately dimensioned starting excavation at the line level.
  • a modern compact welding station in particular laser welding station, can be used in the starting excavation.
  • all known methods can be used.
  • the pipe jacking can be supported.
  • the distance of a propulsion pit to the starting excavation pit or to the adjacent further excavation excavation should be suitably chosen depending on the ground route, the pipe diameter, the weight of the pipes and similar parameters to ensure that the pipe jacking with the selected Rohrvortechnischsstoffn is easily feasible.
  • the welding of the pipe sections to the pipe string designed in an embodiment of the method particularly favorable if the pipe sections by orbital welding or by a laser welding method, preferably using an orbital welding device with a high-power fiber laser beam source and a laser welding head, and / or with a MAG welding process be welded together.
  • orbital welding devices are used to weld pipes along the circumference of the pipe.
  • Orbital welding can be used on a mobile basis.
  • There are welding systems for orbital welding which include mobile generators, mobile heat exchangers and portable fluid and gas tanks to be independent of the on-site infrastructure.
  • manual, partially or fully mechanized methods or combinations thereof may be considered as orbital welding methods.
  • Crucial for the usability in connection with the method according to the invention is that the welding process can be performed stationary in the starting pit or above ground.
  • an orbital welding device for laser welding, for example, an orbital welding device according to the publication WO 2005/056230 A1 can be used within the scope of the invention.
  • this orbital welding device is on the disclosure of the referenced document.
  • tubes which consist of a melt weldable material, in particular steel material or high alloyed, stainless steel and have a diameter of 50 mm to more than 4,000 mm with a wall thickness of 2.5 mm to over 25 mm, within a short time to connect with an orbital circulation.
  • MAG welding processes it is advantageous that these are widely used so that the operator has considerable experience in the application.
  • MAG welding for orbital welding, often only the root is welded in one operation, whereas the cover layers as well as the filler layers or the hotpass are welded by hand.
  • the use of MAG welding is advantageous due to the lower cost of acquiring a MAG welder compared to, for example, a laser welder.
  • Prerequisite for the applicability of MAG welding for carrying out the method according to the invention is always that the welding process in the starting pit is feasible.
  • a quality control of the weld preferably by means of ultrasound or X-ray diagnosis, is carried out.
  • these quality control methods can also be carried out without problems in the interior of the starting excavation at, for example, a welding station installed there for welding. It is thus advantageously avoided that a faulty welded joint between two pipe sections of the pipe string is driven into the trench. Instead, if quality defects are detected, the
  • a further preferred embodiment of the method according to the invention provides that the welded joints are provided with a corrosion protection.
  • a corrosion protection Depending on the condition of the soil, the weather conditions and the medium to be transported in the finished pipeline, in the context of the invention for the production of the corrosion protection, a bitumen coating, a sintering, a cement coating and / or a lamination of the welded joint are possible.
  • the pipe string is driven by thrust by means of a pusher.
  • the thrust can be suitably transmitted in the starting pit and / or in one or more of the propulsion ditches on the pipe string.
  • the thrust for the introduction of the Pipe string by means of a pusher in the starting pit is possible immediately after welding to the existing pipe string.
  • this has the advantage that no communication on the progress of the welding work with the propulsion devices is required because the welding station and the thruster are in close proximity to each other within the same starting excavation ,
  • the pusher is arranged in one or more propulsion intake pits, higher thrust forces can be applied by the interaction of several pusher devices along the pipeline route.
  • longer and / or heavier and / or larger pipe strands can also be used, for example. be driven in trenches with particularly high friction.
  • the pipe string is gripped with jaws on a peripheral surface of the pipe string and, preferably hydraulically, pushed.
  • So-called “pipepushers” are available in the market to carry out this process step.
  • "Pipepushers” are used when the prefabricated pipeline is pulled into the borehole during the production of water crossings by means of HDD (Horizontal Directional Drilling) processes in the final operation , Since the traction forces of the HDD unit are not sufficient for long lengths, additional “pipepushers” are used, which push the pipe string into the borehole with hydraulic cylinders.These methods add the pulling force of the HDD rig to the thrust of the pipepusher a total driving force.
  • the "pipepushers” can be used both alone and in combination with several pipepushes in a plurality of propulsion intake pits as well as in connection with traction devices.
  • the trench is flooded. Also by this measure, both a reduction in friction during propulsion of the pipe string is achieved as well as a reduction in the risk of damage to the pipe string and in particular the welded joints.
  • the flooding of the pipe bottom is particularly suitable when the pipeline level is close to the groundwater level.
  • Figure 1 is a schematic plan view of a construction site for laying an underground pipeline, in which the inventive method with a welding station in a
  • Figure 2 is a side sectional view of a construction site, in which according to an alternative embodiment of the method according to the invention, a welding station is arranged above ground;
  • FIG. 3 shows a vertical section along the line HI-III in FIG. 1;
  • FIG. 1 schematically shows a plan view of a construction site for a pipeline 1 to be laid over land, wherein the pipeline 1 is laid according to the method according to the invention.
  • the starting pit 3 has in the direction of the pipeline line 4 a
  • the longitudinal extent 5 of the starting pit 3 is composed of a working length, corresponding to the length of the laser orbital welding station, and a length of the pipe sections 6, so that they fit in a horizontal orientation in the starting pit 3, with the already in the pipe trench 18th driven tubular string to be welded by means of the housed in the starting pit 3 welding station 7.
  • a pipe section 6 in the interior of the starting excavation 3. Furthermore, in the starting excavation 3 there is a laser orbital welding station 7, which is indicated only schematically by a rectangle.
  • a pipe pusher 8 is accommodated within the starting excavation 3.
  • the pipe pusher 8, which is also shown only schematically, has a pair of jaws 9 for establishing a pressure connection with the pipe sections 6.
  • the jaws 9 are connected via a linkage 10 with an abutment 11.
  • the abutments 11 are supported in the soil of the starting pit 3 in the usual way.
  • each propulsion pit 13 a Rohrpusher 8 is installed in each case.
  • the Rohrpusher 8 correspond in structure to the Rohrpusher 8 in the starting pit 3.
  • the Rohrpusher 8 are supported in the two Vorretesbaugruben 13 on the rear walls 14 of the ground of the Vorretesbaugruben 13 with the abutments 11.
  • a pipe trench 18 is excavated, which also extends through the Vorretesbaugruben 13 and 3 Startbaugrube.
  • the pipe sections 6 are welded to each other at welds 16.
  • the pipe trench 18 is sealed with annular seals 21 against the starting pit 3 and the propulsion ditches 13.
  • the seals 21 surround the pipeline 1 annular.
  • lateral guide rollers 22 which guide the pipeline 1 during propulsion and prevent the pipeline from rubbing along the side walls of the trench 8.
  • the guide rollers can be arranged along the entire length of the trench. In the figure, only one pair is drawn.
  • support rollers 23 are present in the tube sole 17, ie at the bottom of the trench 18, whose axis is aligned horizontally. The support rollers 23 serve to support the pipeline 1 during propulsion. Support rollers may be used at various locations on the bottom 17 of the trench 18. In the figure, for reasons of clarity, only a single support roller 23 is shown by way of example.
  • the end of the pipeline 1 is sealed with a plastic lid 24.
  • FIG. 2 shows another construction site in a vertical sectional view, in which an alternative embodiment of the method according to the invention is used to lay a pipeline 1.
  • the tubular sole 17 can be seen in FIG. 2.
  • the tubular sole 17 corresponds to the bottom of the trench 18.
  • the laser orbital welding station 7 does not act as in the case of FIG 1 in the
  • the preparation area 20 is located in the figure 2 right of the beginning of the trench 18.
  • Between the preparation area 20 and the beginning of the trench 18 is an inclined plane 25 with one of those of the pipe trench 18 corresponding width.
  • the inclined plane 25 connects the terrain surface 2 with the pipe bottom 17, ie with the bottom of the pipe trench 18.
  • FIG. 3 shows a sectional view along the line III-III in FIG. 1.
  • the heap 19 can be seen to the right and left of the pipeline route 4, the pipeline route 4 being perpendicular to the plane of the drawing in FIG.
  • the heap 19 consists of the conveyed.
  • the conveyed material consists essentially of the topsoil, which is stored in a heap, and the other excavation, which must be stored separately.
  • the topsoil can be stored on the left in the figure heap 19 and the other excavation on the right in the figure heap 19.
  • FIG. 3 also shows a water level 27.
  • the support roller 23 can be seen schematically in plan view from the front.
  • the method according to the invention for laying a pipe is explained below with reference to FIGS. 1 to 3.
  • the starting excavation pit 3 is first excavated.
  • an excavator can be used to lift the topsoil.
  • the starting excavation pit 3 is excavated so that its extension in the direction of the pipeline line 4 is substantially the length of a
  • Pipe section 6 plus the length of the laser orbital welding station 7 has.
  • a first propulsion ditch 13 is excavated at a distance 12 from the starting pit 3 in a manner similar to the starting pit 3.
  • the heap 19 is mounted to the right and left of the excavations 3, 13 on the terrain surface 2, wherein the topsoil is stored separately from the other excavation.
  • the trench 18 is excavated between the starting excavation pit 3 and the propulsion excavation pit 13.
  • any known method is suitable within the scope of the invention. It is excavated between all excavations 3, 13 along the pipeline 4 a continuous trench 18. In the context of the invention, it does not depend on the order in which the excavations or the trench are excavated.
  • a Rohrpusher is installed in the starting pit 3 and in each Vortriebsbaugrube 13.
  • the construction site is now ready to receive the pipe sections.
  • a first pipe section 6 is lowered into the starting pit 3.
  • the pipe section 6 is surrounded with the jaws 9 of the Rohrpushers 8 and advanced in the figures not shown hydraulic cylinder in the trench 18 along the pipeline line 4 in the direction of the first propulsion pit 13.
  • the propulsion of the first pipe section 6 takes place approximately as far as until the rear end of the pipe section 6 is in the region of the welding station 7.
  • a further pipe section 6 is lowered into the starting pit 3 until it is aligned horizontally and then arranged on the first pipe section 6 in the direction of the pipeline line 4.
  • the ends of the two pipe sections 6 are then welded together in a single operation.
  • a quality control of the welded connection between the pipe sections 6 is also carried out by means of ultrasound or X-ray analysis. If necessary, the weld is repaired.
  • the laser orbital welding method is therefore particularly well suited for carrying out the method according to the invention, since it can be carried out with a compact device which can be installed in the starting pit.
  • Pipe sections 6 built to build the entire pipeline. For this purpose, a minimum excavated soil in addition to the pipe trench 18 is required with great advantage only on isolated, spaced at intervals 12 excavations 3, 13, so that the environment and / or agricultural production areas are largely spared. Along the entire length of the pipeline line 4 only a slot-like pipe trench 18 must be excavated. A further relief of the environment results from the elimination of a very wide strip of work around the pipeline line 4 around.
  • the working strip can be omitted since the use of the laser orbital welder 7 in the starting excavation 3 eliminates welding of the pipe sections 6 along the trench 18. Instead, the welding takes place centrally exclusively in the starting pit 3, wherein in each case successively individual pipe sections 6 are welded to the already present in the trench 18 pipe string.
  • the use of the laser orbital welder 7 allows extremely short cycle times of about ten minutes for the welding process.
  • the interaction of a plurality of installed in Vorretesbaugruben 13 Rohrpushern 8 allows the propulsion of the pipe string in the trench 18 over several kilometers. It is particularly advantageous that the welding station 7 remains firmly in the starting pit 3, whereby welding operations are carried out in this starting pit 3 or in several pits.
  • a material delivery and / or storage, in particular of pipe sections 6, is carried out exclusively in the vicinity of the starting pit 3.
  • the environment and / or agricultural production areas are spared by this measure as far as possible.
  • a first method for laying a pipeline composed of a plurality of separate pipe sections along a pipeline route 4 is proposed, which ensures minimal excavation and minimal surface use, and is suitable for producing and driving pipelines over several kilometers.
  • Preparation area 20 set up on the terrain surface 2. Further, a feeder trench whose bottom has an inclined plane 25 is excavated. The bottom of the feed trench has the level of the terrain surface 2 in the preparation area 20 and extends along the inclined plane 25 in increasing depth to the level of the bottom 17 of the trench 18.
  • side guide rollers 22 can be installed in the pipe trench, which serve that the pipe string laterally not in contact with the side wall of the Pipe trench 18 device, but is performed while minimizing the friction of the lateral guide rollers 22.
  • support rollers 23 can be installed on the bottom 17 of the pipe trench 18 at suitably selected intervals, which support the pipe string in the vertical direction during propulsion and prevent direct abrasion of the pipe string at the bottom 17 of the pipe trench 18.
  • the trench 18 can be flooded. Due to the buoyancy of the pipe string and because of the lubrication by the flooding water thereby significantly reduces the resistance during propulsion. In order to prevent flooding of the trench 18, the starting pit and / or the Vorretesbaugruben are also flooded, the annular seals are provided around the pipe string.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

L'invention concerne un procédé de pose d'une tuyauterie, constituée d'une pluralité de tronçons de tube séparés (6), sur un niveau de conduite souterrain (17) le long d'un tracé de conduite (4), comprenant les étapes suivantes : creusement d'une tranchée (18) ; réalisation de la tuyauterie sur place par soudage des tronçons de tube (6) les uns aux autres ; introduction de la tuyauterie dans la tranchée (18) ; comblement de la tranchée. Selon l'invention, afin de minimiser le creusement du sol et la surface utilisée, le soudage s'effectue stationnairement et la ligne de tubes est introduite dans la tranchée (18) depuis le poste de soudage stationnaire.
PCT/EP2007/007606 2006-11-03 2007-08-31 Procédé de pose d'une tuyauterie Ceased WO2008052612A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610052261 DE102006052261A1 (de) 2006-11-03 2006-11-03 Verfahren zum Verlegen einer Rohrleitung
DE102006052261.3 2006-11-03

Publications (1)

Publication Number Publication Date
WO2008052612A1 true WO2008052612A1 (fr) 2008-05-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/007606 Ceased WO2008052612A1 (fr) 2006-11-03 2007-08-31 Procédé de pose d'une tuyauterie

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Country Link
DE (1) DE102006052261A1 (fr)
WO (1) WO2008052612A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011150341A2 (fr) 2010-05-28 2011-12-01 Brasfond Usa Corp. Système d'insertion de canalisation
CN107606305A (zh) * 2017-08-18 2018-01-19 新地能源工程技术有限公司 一种地下水丰水区燃气管道架设方法
CN110688719A (zh) * 2019-10-10 2020-01-14 中国人民解放军63926部队 一种直角管沟可通过管道最大长度计算方法
CN110873230A (zh) * 2019-11-22 2020-03-10 韶关市第一建筑工程有限公司 顶管工程施工工艺
CN113883331A (zh) * 2021-10-29 2022-01-04 中石化石油工程技术服务有限公司 穿越滩涂、湿地、水网地带连续定向钻工法
DE102020117312A1 (de) 2020-07-01 2022-01-05 Forschungsinstitut für Flüssigboden GmbH privatwirtschaftliches Unternehmen Verfahren zum Verlegen von Rohrleitungen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013013603B3 (de) * 2013-08-19 2014-10-23 Peter Feldmann Verfahren zum Verlegen von Rohren

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DD118926A1 (fr) * 1975-03-24 1976-03-20
WO1993012366A1 (fr) * 1991-12-19 1993-06-24 Ilomaeki Valto Procede et appareil pour diriger l'enfoncement d'une conduite tubulaire dans le sol
EP0622583A1 (fr) * 1993-04-30 1994-11-02 Gelsenwasser AG Procédé et dispositif pour l'installation de conduites souterraines
US20030039509A1 (en) * 2001-08-24 2003-02-27 Mcivor Garry Apparatus for laying pipeline
DE102004035911A1 (de) * 2004-07-20 2006-02-16 Siemens Ag Verfahren zum Verlegen eines Rohres

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US3084246A (en) * 1959-07-06 1963-04-02 Exxon Research Engineering Co Process and apparatus for welding
DE19624955A1 (de) * 1996-06-24 1998-01-08 Matthias Prof Dr Ing Kleiner Verfahren zur Herstellung von Rohren durch eine Umformung mittels Wirkmedien
DE19819566C2 (de) * 1998-04-30 2002-03-14 Edr Ingbuero Gmbh Verfahren zum Einbau eines Stahlrohrs in einem Stollen

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Publication number Priority date Publication date Assignee Title
DD118926A1 (fr) * 1975-03-24 1976-03-20
WO1993012366A1 (fr) * 1991-12-19 1993-06-24 Ilomaeki Valto Procede et appareil pour diriger l'enfoncement d'une conduite tubulaire dans le sol
EP0622583A1 (fr) * 1993-04-30 1994-11-02 Gelsenwasser AG Procédé et dispositif pour l'installation de conduites souterraines
US20030039509A1 (en) * 2001-08-24 2003-02-27 Mcivor Garry Apparatus for laying pipeline
DE102004035911A1 (de) * 2004-07-20 2006-02-16 Siemens Ag Verfahren zum Verlegen eines Rohres

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011150341A2 (fr) 2010-05-28 2011-12-01 Brasfond Usa Corp. Système d'insertion de canalisation
EP2576130A4 (fr) * 2010-05-28 2014-11-12 Brasfond Usa Corp Système d'insertion de canalisation
US9039329B2 (en) 2010-05-28 2015-05-26 Brasfond Usa Corp. Pipeline insertion system
CN107606305A (zh) * 2017-08-18 2018-01-19 新地能源工程技术有限公司 一种地下水丰水区燃气管道架设方法
CN110688719A (zh) * 2019-10-10 2020-01-14 中国人民解放军63926部队 一种直角管沟可通过管道最大长度计算方法
CN110873230A (zh) * 2019-11-22 2020-03-10 韶关市第一建筑工程有限公司 顶管工程施工工艺
CN110873230B (zh) * 2019-11-22 2021-06-04 韶关市第一建筑工程有限公司 顶管工程施工工艺
DE102020117312A1 (de) 2020-07-01 2022-01-05 Forschungsinstitut für Flüssigboden GmbH privatwirtschaftliches Unternehmen Verfahren zum Verlegen von Rohrleitungen
EP3933241A1 (fr) 2020-07-01 2022-01-05 Forschungsinstitut für Flüssigboden GmbH Procédé de pose de conduites
DE102020117312B4 (de) 2020-07-01 2024-08-01 Forschungsinstitut für Flüssigboden GmbH privatwirtschaftliches Unternehmen Verfahren zum Verlegen von Rohrleitungen
CN113883331A (zh) * 2021-10-29 2022-01-04 中石化石油工程技术服务有限公司 穿越滩涂、湿地、水网地带连续定向钻工法

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