EP1253252A1 - Pylône pour haute tension à fondation renforcée - Google Patents

Pylône pour haute tension à fondation renforcée Download PDF

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Publication number
EP1253252A1
EP1253252A1 EP02076679A EP02076679A EP1253252A1 EP 1253252 A1 EP1253252 A1 EP 1253252A1 EP 02076679 A EP02076679 A EP 02076679A EP 02076679 A EP02076679 A EP 02076679A EP 1253252 A1 EP1253252 A1 EP 1253252A1
Authority
EP
European Patent Office
Prior art keywords
foundation
pylon
tie anchor
load
permissible
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.)
Withdrawn
Application number
EP02076679A
Other languages
German (de)
English (en)
Inventor
Joseph Fransiscus Van Wolven
Jacobus Fredericus Rikken
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.)
Kema NV
Original Assignee
Kema NV
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 Kema NV filed Critical Kema NV
Publication of EP1253252A1 publication Critical patent/EP1253252A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/50—Anchored foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts

Definitions

  • Increasing the transport capacity generally entails increasing the load on the pylons; it will be wished to increase the conductor cross-section or the number of conductors of a line, or to increase the height of the pylon so as to increase the permissible sag of the conductors. In all these cases the mechanical load on the pylon will increase. This will of course involve an increase of the load on the foundation of such a pylon.
  • the foundation of such a pylon which is usually provided with four legs, consists of four foundation elements, one for each of the legs, each resting on a number of piles present in the ground.
  • Such a foundation element is dimensioned to absorb pressure forces and to absorb tensile forces.
  • the tensile strain is generally caused by the wind, the pressure force by own weight and the vertical load of conductors and insulators.
  • soil-drilling tests are carried out in the ground, wherein a foundation is dimensioned on the basis of the results of these soil-drilling tests.
  • a safety factor is herein taken into account which depends per se on the ground characteristics and the variance in soil qualities which can hereby be anticipated, and the distance between the soil-drilling tests.
  • the pylons are often placed in poorly accessible locations. They are in any case often placed a great distance from roads which can be used for heavy equipment, so that large investment is necessary to reach the locations with this heavy equipment.
  • the object of the present invention is to provide a method wherein it is possible to increase the load-bearing capacity of the foundations with a relatively small amount of machinery. This entails that both the pressure capability and the tensile capability must be increased or demonstrated.
  • the invention comprises of increasing the tensile capability by means of arranging a tie anchor and demonstrating that sufficient pressure capability is available.
  • This object is achieved by a method wherein at least one tie anchor is arranged in the ground in the vicinity of the foundation of the pylon, and the tie anchor is connected to the relevant foundation.
  • tie anchor can easily be arranged without employing particularly heavy equipment; it is possible to transport the means required for this purpose to the relevant location using for instance a wheelbarrow or a rowing boat.
  • the permissible load of the tie anchor is tested before the tie anchor is connected to the relevant foundation.
  • the pressure load of the foundation is investigated during testing of the tensile strain of the tie anchor, and a new value of the permissible pressure load of the foundation is obtained from the obtained result.
  • the testing is of course continued up to a force which, while taking a safety factor into account, corresponds with the load calculated for a heavier line.
  • the relevant load can be permitted.
  • Use is preferably made of a hydraulic cylinder in testing of the tensile strain of the tie anchor and the pressure load of the foundation.
  • the invention further relates to a device for testing the pressure load of a foundation and the tensile strain of a tie anchor arranged in the ground in the vicinity of the foundation, comprising a linear drive element, one side of which is adapted for connection to the foundation and the other side of which is adapted for connection to the tie anchor, and a measuring device for measuring the force exerted by the linear drive element on the foundation and the tie anchor.
  • Such a device can advantageously be used in applying the method as described in the foregoing.
  • Such a device is not very voluminous and does not weigh very much, so it can be arranged at the relevant location without many transport problems.
  • the linear drive element is formed by a hydraulically drivable cylinder.
  • the invention relates to a high-voltage pylon, the permissible load of which is increased, which is characterized by at least one tie anchor which is arranged in the ground in the vicinity of one of the foundations and which is connected to the foundation, wherein the foundation of the pylon otherwise remains unchanged.
  • Figure 1 shows a pylon 1 which is provided with four legs, only two of which, numbers 2 and 3, are visible.
  • Leg 2 is placed on a foundation plate 4 and leg 3 is placed on a foundation plate 5.
  • Foundation plate 4 is placed on a foundation pile 6 and foundation plate 5 is placed on a foundation pile 7.
  • the existing foundation piles 6 and 7 extend through a loose soil stratum 8 into a firm soil stratum 9, for instance consisting of sand.
  • Tie anchor 10 In order to increase the permissible tensile forces on foundation pile 6 by pylon 1, there is arranged according to the invention a tie anchor 10 which is per se known in the prior art. Tie anchor 10 is connected to a space above the ground surface by means of a rod or tube 11. Tie anchor 10 can be connected to foundation plate 4 by means of a connecting construction 12. Greater tensile forces can hereby be exerted on the foundation by the pylon, which in most cases is the most critical when the pylon load is increased.
  • a cylinder 13 For the purpose of investigating the permissible load of the tie anchor use is made of a cylinder 13, preferably a hydraulic cylinder 13.
  • the connection 12 is of course broken here and tie rod 11 is directly connected to the suction position 14 of hydraulic cylinder 13.
  • Hydraulic cylinder 13 is connected to a pump 16 by means of a hose 15.
  • the force exerted by hydraulic cylinder 13 can be increased to a desired value by switching on the pump.
  • Use is of course made herein of measuring means (not shown in the drawing) for measuring the force in question.
  • Posts 17 are after all usually the most heavily loaded elements of the pylon construction, while the buckling load of these elements can be increased using relatively simple means.
  • this invention is applicable not only to pylons for carrying high-voltage lines, but also to other types of pylon, such as for instance masts for transmitters, particularly transmitters for the purpose of mobile telephony.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
EP02076679A 2001-04-27 2002-04-29 Pylône pour haute tension à fondation renforcée Withdrawn EP1253252A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1017953A NL1017953C2 (nl) 2001-04-27 2001-04-27 Hoogspanningsmast met verzwaarde fundatie.
NL1017953 2001-04-27

Publications (1)

Publication Number Publication Date
EP1253252A1 true EP1253252A1 (fr) 2002-10-30

Family

ID=19773312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02076679A Withdrawn EP1253252A1 (fr) 2001-04-27 2002-04-29 Pylône pour haute tension à fondation renforcée

Country Status (2)

Country Link
EP (1) EP1253252A1 (fr)
NL (1) NL1017953C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2799622A1 (fr) * 2013-05-02 2014-11-05 Koninklijke BAM Groep N.V. Tour de haute tension avec un fondement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043133A (en) * 1976-07-21 1977-08-23 Yegge Lawrence R Structure and method of constructing and test-loading pile anchored foundations
JPS5339608A (en) * 1976-09-22 1978-04-11 Matsujirou Yamazaki Method of reinforcing foundation for transmission tower
JPS59233019A (ja) * 1983-05-30 1984-12-27 Kyoei Densetsu Kk ア−スアンカ−の造成方法とア−スアンカ−造成部材及び該部材の自動圧入装置
US5319901A (en) * 1991-06-14 1994-06-14 Goldsworthy W Brandt Bifurcated column joint system for electrical transmission tower

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043133A (en) * 1976-07-21 1977-08-23 Yegge Lawrence R Structure and method of constructing and test-loading pile anchored foundations
JPS5339608A (en) * 1976-09-22 1978-04-11 Matsujirou Yamazaki Method of reinforcing foundation for transmission tower
JPS59233019A (ja) * 1983-05-30 1984-12-27 Kyoei Densetsu Kk ア−スアンカ−の造成方法とア−スアンカ−造成部材及び該部材の自動圧入装置
US5319901A (en) * 1991-06-14 1994-06-14 Goldsworthy W Brandt Bifurcated column joint system for electrical transmission tower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 111 (M - 379) 15 May 1985 (1985-05-15) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2799622A1 (fr) * 2013-05-02 2014-11-05 Koninklijke BAM Groep N.V. Tour de haute tension avec un fondement
EP2799623A3 (fr) * 2013-05-02 2014-11-19 Koninklijke BAM Groep N.V. Procédé permettant de fournir une fondation pour une tour d'électricité haute tension, réseau de tours d'électricité haute tension munies d'une fondation et tour d'électricité haute tension munie d'une fondation

Also Published As

Publication number Publication date
NL1017953C2 (nl) 2002-11-05

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