EP3111016A1 - Procédé et dispositif d'introduction dans le sol d'une base filetée - Google Patents

Procédé et dispositif d'introduction dans le sol d'une base filetée

Info

Publication number
EP3111016A1
EP3111016A1 EP14828485.4A EP14828485A EP3111016A1 EP 3111016 A1 EP3111016 A1 EP 3111016A1 EP 14828485 A EP14828485 A EP 14828485A EP 3111016 A1 EP3111016 A1 EP 3111016A1
Authority
EP
European Patent Office
Prior art keywords
speed
torque
impact force
switched
impact
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Withdrawn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
EP14828485.4A
Other languages
German (de)
English (en)
Inventor
Günther THURNER
Martin Thurner
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.)
Krinner Innovation GmbH
Original Assignee
Krinner Innovation GmbH
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 Krinner Innovation GmbH filed Critical Krinner Innovation GmbH
Publication of EP3111016A1 publication Critical patent/EP3111016A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/26—Placing by using several means simultaneously
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E02D5/28—Prefabricated piles made of steel or other metals
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/56—Screw piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/60—Piles with protecting cases
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/22—Placing by screwing down

Definitions

  • the invention relates to a method and an apparatus for introducing sterfunda- elements in the soil, especially in soil of different soil conditions.
  • Screw foundations are used in a variety of ways and also introduced into the soil with screw-in tools of a mechanical type. Nevertheless, in order to be able to reliably bring the ground screws into the ground for a wide variety of ground conditions, i. especially when stones are in the screw of the screw foundation, the corresponding ringfundNonetheless have been equipped with hardened tips or chisel-like additional tools, which are guided inside the ringfundniess and serve the destruction of the stone, so to speak at the leading edge when introducing the gradfundNonethelesss.
  • impact sleeves are known, which are merely hammered or driven into the ground by a striking tool. While only one impact device is present in impact sleeves, i. a screwing prohibits, because the impact sleeves in the longitudinal direction or Einschlagraum trained webs to prevent rotation, the fferfundêt threaded ridges have attached to their outer contour, so that they can be screwed into the ground.
  • For wrapping are
  • the basic procedure when using such rotary hammers would mean that it would be necessary to pre-drill, then a drill would have to be removed from the generated borehole in order subsequently to be able to subsequently screw in a foundation.
  • the pre-drilling and producing a borehole for the introduction of a screw foundation is also disadvantageous because, if necessary, then it can not be ensured that the screw foundation is reliably anchored, and because, moreover, although a predrilled hole for the screw foundation has been produced, However, it can not be ruled out that a stony ground condition would oppose considerable resistance to the penetration of the helices of the screw foundation, so that when screwing in even with a pre-drilled hole, the screw foundation to be introduced may possibly be damaged or even destroyed.
  • the feed rate and rotational movement are synchronized in accordance with the pitch of the helical fin assembly.
  • the rotational speed is controlled in dependence on the traveled actual distance until some courses of the rib have taken in the ground and can be provided by merely further rotation of the concrete pile due to the support of the rib necessary for displacing the soil axial force.
  • the rotational speed is set according to the desired feed speed.
  • a torque and an impact force directed in the direction of insertion of the screw foundation are applied to the screw foundation alternately one after the other or at least temporarily at the same time, depending on the soil.
  • the screw foundation has on its outer contour an outer spiral in the manner of a thread with a defined pitch. If now the screw foundation is screwed into the soil, i. not drilled, so at a given speed corresponding to the slope of the Eindringweg over time or the feed rate is theoretically determined.
  • the ratio of torque and impact performance in favor of the torque is changed.
  • the maximum torque is increased compared to the aforementioned conventional Schlagbohrköpfen and held the impact performance constant or even reduced.
  • An exemplary embodiment is a torque of 5 to 10 kNm and a punch power of about 5 kW, so that a ratio of about 1 to 2: 1 exists.
  • a (current) slip value is preferably determined on the basis of a rotational speed measurement and a longitudinal movement measurement (feed measurement) of the screw foundation and of the gradient.
  • the slip value is kept within predefined limits by varying the speed and switching the impact force on or off.
  • the limits of the slip value are preferably defined in such a way that a certain deviation from the theoretically traveled penetration path is permitted, ie limits are defined as a function of the theoretically traversed penetration path.
  • the rotational speed and the impact force are regulated in such a way that when the amount of this slip value, ie a limit of the slip value, is exceeded, the impact force is switched on or off, the control taking place such that the amount of the slip value after switching on or off is respected again.
  • the speed and the impact force are controlled to each other so that always the predetermined limits of the Schiupfwerts are not exceeded. Namely, only then can it be ensured that, on the one hand, a good penetration into the ground is ensured, ie that resistances possibly present through stones are overcome with a correspondingly slower penetration rate, but that the solid anchoring of the screw foundation with its outer spirals in the soil is not thereby eliminated. If, according to a preferred embodiment, the actual penetration path is reduced relative to a theoretical penetration path related to the current rotational speed, the impact force is switched on and the rotational speed is adapted accordingly on the basis of the longitudinal movement and the gradient. This is the case, for example, when the screw foundation encounters a hard ground area such as a stone when screwing.
  • the impact force is switched off.
  • the total theoretical length traveled is determined as compared, for example, by integral formation and with the actual longitudinal path traveled by means of the screw foundation during insertion. If this actual longitudinal path is now reduced in relation to the theoretically covered longitudinal path, whereby the theoretically covered longitudinal path is determined from inclination and revolutions, the impact force is switched on and the speed reduced to such an extent that the reduced longitudinal path is adapted accordingly in the direction of the expected longitudinal path. Upon reaching a predetermined approach value to the expected, ie theoretical longitudinal path, the impact force is switched off again.
  • the torque exerted on the screw foundation is limited or reduced.
  • a maximum torque is predetermined by the drive or is set on the machine depending on the soil condition, the type of screw foundation and / or further introduction or boundary conditions.
  • the measured actual torque is compared with a predetermined maximum torque during penetration.
  • the speed is reduced as far as reaching the predetermined maximum torque and at the same time switched on the percussion that the predetermined maximum torque is not exceeded.
  • the impact force is applied to the screw foundation until a new light torque, i. a renewed startup of the device, a propulsion in the direction of insertion is available again.
  • the impact force is preferably switched on when the speed drops by a predefined amount.
  • a substantially constant torque is demanded from the screwing tool with consistently constant soil conditions.
  • the torque increases at best due to increasing friction on the Eincardiefe. If the screw foundation, and in particular the tip of the screw foundation strikes a layer of hard ground or a stone or rock, the torque required increases abruptly. If this torque increase is limited by the maximum torque of the drive, the speed drops. In such a speed drop then preferably the impact force is switched on.
  • the speed drop can be defined as a threshold value via a (negative) gradient or a speed difference. If the threshold value is exceeded, the impact force is preferably switched on automatically.
  • the exceeding of the threshold value can also be displayed via a display device, for example in the form of a lamp or a display.
  • a display device for example in the form of a lamp or a display.
  • the impact of the fferfundaments on a stone, a rock or the like is also recognizable by the abrupt increase in torque.
  • a behavior of the torque is detectable and usable as Einschaltbedingung for the impact force.
  • a torque difference or a slope of the torque curve can also be defined as a threshold value.
  • the maximum torque and / or the threshold for the switch-on condition are preferably set as a function of the nature of the soil and / or the screw foundation to be screwed in.
  • This embodiment is also completely self-contained possible, i. without corresponding slip values are required as the basis for a control of the connection or shutdown of the torque or the impact force.
  • the control is carried out on the basis of the maximum torque.
  • the maximum torque When the maximum torque is reached, it is always reduced or switched off and the impact force is switched on, which can be followed by the switching on of the torque again after a corresponding penetration.
  • a multiple change between switching on and switching off torque and / or impact force is conceivable, so that ensures optimal insertion of the erfundaments while securing a reliable anchorage by the balanced combination of switching on or Abschalte ns of torque and power becomes.
  • the impact force is switched off when reaching the rated speed and when the torque falls by a predefined value.
  • the impact force is exerted by high-frequency vibrations.
  • the high-frequency vibrations may preferably be high-frequency or ultra-high-frequency sound vibrations.
  • Screw foundations provided in the soil, by means of which a sleeve body is introduced with on its outer sides existing outer spiral with a thread-like pitch.
  • This device realizes the method according to the invention described above.
  • This device comprises a rotating device for screwing the sortedfundaments, a striking device for generating a striking force in the direction of insertion of the screw foundation, a speed measuring device for determining the current speed of the fferfundniess during its introduction, further comprises a displacement measuring device for determining the Einbringweges the fferêt noirs and a control device for controlling the rotating device and impact device and their connection or disconnection.
  • the control device are the rotating device and the impact device during the introduction of the
  • control device acts on the rotating device as speed reducing and the impact device is switched on when the fferfundament strikes a rock or hard ground and the actual Einbringweg is less than the current speed corresponding Einbringweg until the amount of the defined slip value is reached.
  • the impact device is designed as a device which emits ultra-high-frequency vibrations in the form of a sound source.
  • the high-frequency vibrations can also be generated by a device which outputs mechanical vibrations.
  • a torque sensor is furthermore provided by means of which the current torque can be measured, on the basis of which the rotary device can be switched off or down regulated on reaching a defined maximum permissible torque.
  • the device has at least one contact surface pair, via which the torque from the motor of the rotary device can be transmitted to a drive shaft and the screw foundation.
  • the contact surface pair is arranged on a diameter which corresponds to at least twice, in particular five times the diameter of the drive shaft.
  • the contact surfaces of the contact surface pair are movable relative to each other, in particular in the direction of a rotation axis of the rotating device.
  • FIG. 1 shows an embodiment of a screw foundation loading device according to the invention
  • FIG. 2 shows the screw foundation in a first position during screwing in
  • FIG. 3 shows the screw foundation in a second position during screwing in
  • FIG. 4 shows a flow diagram of a method according to the invention for inserting a screw foundation
  • FIG. 5 shows a second embodiment of a screw foundation loading device according to the invention
  • Figure 7 a, b, c various embodiments of a fferfundaments in side view and bottom view, which can be introduced with the method according to the invention or the device according to the invention in the soil.
  • FIG. 1 shows an inventive feeding device 1 for introducing a screw foundation 10 into the ground 20.
  • the screw foundation 10 has a helical spiral 11 at least in partial regions.
  • the introduction device 1 has a carriage 2, in which a drive head 3 is arranged displaceably. By the Reiativiolo the drive head 3 relative to the carriage 2, which is generally carried out in a substantially vertical direction, the feed V for the introduction of the screw 10 is provided.
  • the feed V can be provided by the own weight, in particular of the drive head 3, or by an active drive with a given propulsion force and / or propulsion speed.
  • the drive head 3 has a coupling 7, which is rotationally rigidly connected to the screw foundation 10.
  • the coupling 7 is rotatable by the drive head 3 both in the direction of rotation R and movable in the translation direction T to perform a percussion drilling.
  • Both a speed sensor 4 and a torque sensor 5 for measuring the introduction speed or the Einbringmoments and a displacement sensor 6 for determining the feed path and the feed rate are provided on the drive head 3 or on the feed unit 1.
  • FIG. 2 shows a section of the screw foundation 10 in a first position during introduction into the soil 20.
  • the screw foundation has a thin-walled cylindrical sleeve 14 and the helical coil 11 arranged on the outside thereof.
  • the helical coil 11 cuts into the soil 20 such that both the upper and the lower flanks 12 and 13 abut in the soil 20.
  • the feed rate often does not match the feed rate.
  • the feed rate v is too small or the rotational speed n is too high.
  • the cavity 21 is created by the fact that the real feed lags behind the ideal feed to the tail N.
  • FIG. 4 schematically shows a flowchart for a loading process according to the invention.
  • the turning operation is started at step 100.
  • the driving-in process is monitored by means of the sensors for speed, torque and feed (4, 5 and 6).
  • a stone recognition 110, a thread protection 120 and a Schaubfundamentschonung 130 are realized via these sensors.
  • the insertion depth is monitored via the feed sensor 6.
  • the insertion process is terminated in step 150.
  • the monitoring operations 110, 120 and 130 usually run parallel to each other.
  • the individual types of control can also be implemented individually or in various combinations.
  • For each of the monitors there is a condition in column 101, with which the respective state is detected.
  • the impact device or the impact force is then switched on and the further introduction according to column 103 is regulated.
  • the hammer mechanism is turned off in accordance with column 105.
  • the stone recognition 110 has as recognition condition that a collapse of the feed rate takes place.
  • the current slip exceeds a predetermined limit slip value, since, for example, the screw foundation strikes a rock and the feed rate is reduced abruptly. Turning on the percussion ensures that even in hard subsurface, for example in rock or rock, a feed takes place.
  • the exit condition here is the exceeding of a preset limit speed, for example 20 min -1 . With entry of the exit condition, the impact mechanism is switched off and the speed control is terminated.
  • the detection 121 is determined on the basis of the traveled feed path and, ideally, on the basis of the number of revolutions u and the thread pitch p.
  • the follower N is considered to be the recognition criterion. If the caster exceeds a predefined value, for example half a thread pitch p, then the percussion mechanism switches on, and speed control likewise takes place. In the given case, however, the slip s is set to a value ⁇ 1, for example 0.9, d. H. regulated on negative slip. This counteracts the further destruction of the structure in the soil, in particular that an on-the-surface conveying of soil through the screw foundation 10 or the helical coil 11 takes place. As an exit condition applies here according to step 124, when the caster is reduced to zero or falls below a predefined value. Upon reaching the exit condition, the hammer mechanism is turned off and the speed control is terminated.
  • a third type of control is the screw foundation protection according to FIG. 130.
  • the detection criterion according to step 131 is when a predefined maximum torque or a limit torque is reached.
  • the torsional rigidity of the screw foundation 10 or the rated power of the drive head 3 can serve as limit torque.
  • the torque is regulated to the limit torque, which may be reduced by a safety factor, according to step 133.
  • exit sbedi ng u ng according to step 134 here is in particular the falling below the predetermined speed limit by a predefined value at maximum speed. If, for example, the maximum torque is 3500 Nm, the limit torque for switching on can be 3000 Nm.
  • the hammer mechanism is turned off and the torque control of step 133 is also terminated.
  • FIG. 5 shows a second embodiment of the introduction device 1 according to the invention, in particular the drive of the insertion device 1 according to the invention, in which an oscillation can be introduced into the coupling 7 by means of an oscillatory movement.
  • a sleeve 30 is rotatably mounted on the shaft.
  • the sleeve 30 is arranged concentrically with the shaft.
  • a mass 31 is arranged as imbalance.
  • the sleeve via a drive 32 for example an electric motor, can be driven.
  • the direction of rotation of the sleeve is preferably opposite to the direction of rotation of the clutch.
  • This device can be arranged in addition to the impact boring machine shown in Example 1 on the loading machine 1 or only in combination with a boring machine.
  • Vibrations in particular vibrations, are particularly advantageous in the screw foundation protection control or in the overload protection according to step 130 in FIG. 4. However, it is also usable, for example, for penetrating rock in stone detection according to step 110 in FIG.
  • the axis of rotation of the mass 31 is alternatively also perpendicular to the longitudinal axis of the fferfundaments attachable.
  • the speed of rotation of the mass 31 is preferably between 1000 and 10,000 min. 1
  • FIGS. 6a, b show a second embodiment of the introduction device 1 according to the invention, in particular the drive of the insertion device 1 according to the invention.
  • the motor 8 of the drive head 3 is formed with a central passage 33 through which a hollow shaft 34 is passed and driven by the motor 8. Concentric with the hollow shaft 34, a drive shaft 35 is formed and passed through the hollow shaft 34. On a first side of the motor 8, a firing pin 36 is arranged, via which impact energy in the drive shaft 35 can be introduced. On the opposite second side of the engine 8, the hollow shaft 34 has two drivers 37 which form contact surfaces 39a, b with wings 38 arranged on the drive shaft. Through the hollow shaft 34 and the contact surface pairs 39a, b, the torque of the motor 8 is transmitted to the drive shaft 35.
  • FIG. 7 a shows a screw foundation 10, which consists of a cylindrical, thin-walled sleeve 14.
  • the screw foundation 0 according to FIG. 7b has a conical section in the lower region and is open towards the bottom.
  • the screw foundation according to FIG. 7c has a thin-walled cylindrical section in the upper region and a conical section in the lower region, which terminates in a closed screw foundation tip.
  • For solid types of soil such as sandstone are preferably open at the bottom
  • the screw thread can! 11 may be arranged over the entire length of the screw foundation or only in partial areas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (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)
  • Earth Drilling (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

L'invention concerne un procédé d'introduction dans le sol d'une base filetée comportant une hélice pourvue d'un pas sur son contour extérieur à la manière d'un filetage. Dans ledit procédé, la base filetée est soumise, lors de son introduction dans le sol, alternativement ou au moins temporairement, à la fois à un couple et, dans la direction d'introduction, à une force de percussion.
EP14828485.4A 2014-02-28 2014-12-30 Procédé et dispositif d'introduction dans le sol d'une base filetée Withdrawn EP3111016A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014002986.7A DE102014002986B3 (de) 2014-02-28 2014-02-28 Verfahren und Vorrichtung zum Einbringen von Schraubfundamenten ins Erdreich
PCT/EP2014/079450 WO2015128048A1 (fr) 2014-02-28 2014-12-30 Procédé et dispositif d'introduction dans le sol d'une base filetée

Publications (1)

Publication Number Publication Date
EP3111016A1 true EP3111016A1 (fr) 2017-01-04

Family

ID=52394228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14828485.4A Withdrawn EP3111016A1 (fr) 2014-02-28 2014-12-30 Procédé et dispositif d'introduction dans le sol d'une base filetée

Country Status (5)

Country Link
US (1) US9976275B2 (fr)
EP (1) EP3111016A1 (fr)
CA (1) CA2940890A1 (fr)
DE (1) DE102014002986B3 (fr)
WO (1) WO2015128048A1 (fr)

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GB2525147B (en) * 2014-01-27 2020-09-09 Mmi Engineering Ltd Pile insertion
WO2019048730A1 (fr) * 2017-09-07 2019-03-14 Junttan Oy Dispositif de serrage
DE102018209564B4 (de) 2018-06-14 2021-05-20 Krinner Innovation Gmbh Eindrehvorrichtung mit schlagwirkung
US10697490B2 (en) * 2018-07-24 2020-06-30 Ojjo, Inc. Threaded truss foundations and related systems, methods, and machines
AU2020229639B2 (en) * 2019-02-28 2023-03-02 Giken Ltd. Pile press-in device and pile press-in method
CN110130154A (zh) * 2019-05-22 2019-08-16 中铁八局集团第三工程有限公司 高速铁路软基处理螺杆桩施工方法
EP3792403A1 (fr) * 2019-09-11 2021-03-17 Stump-Franki Spezialtiefbau GmbH Procédé de fabrication d'un pieu foré à décalage planimétrique plein, système d'aide au vissage permettant de guider un processus de vissage dans un tel procédé ainsi que logiciel pour un tel système d'aide au vissage
EP3792404B1 (fr) 2019-09-12 2022-11-16 Krinner Innovation GmbH Dispositif de vissage et de battage
US11708678B2 (en) 2019-12-18 2023-07-25 Cyntech Anchors Ltd Systems and methods for supporting a structure upon compressible soil
KR20220130154A (ko) * 2020-01-27 2022-09-26 어더 랩 엘엘씨 수중 기재에 앵커를 설치하기 위한 차량
AU2021340899A1 (en) 2020-09-14 2023-04-27 Nextracker Llc Support frames for solar trackers
DE102021130447B3 (de) * 2021-11-22 2023-03-09 Krinner Innovation Gmbh An einem auslegerarm eines ein widerlager bildenden baggers angebrachte eindrehvorrichtung für ein schraubfundament
WO2023175182A1 (fr) * 2022-03-17 2023-09-21 Itrec B.V. Installation de pieu
WO2023180295A1 (fr) * 2022-03-21 2023-09-28 Aalborg Universitet Procédé et système d'installation d'un pieu vissé dans un sol

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Also Published As

Publication number Publication date
US20160362864A1 (en) 2016-12-15
CA2940890A1 (fr) 2015-09-03
WO2015128048A1 (fr) 2015-09-03
US9976275B2 (en) 2018-05-22
DE102014002986B3 (de) 2015-03-12

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