EP1016759A1 - Méthode et dispositif d'amélioration du sol de fondation avec détermination du degré de compaction - Google Patents

Méthode et dispositif d'amélioration du sol de fondation avec détermination du degré de compaction Download PDF

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Publication number
EP1016759A1
EP1016759A1 EP99124258A EP99124258A EP1016759A1 EP 1016759 A1 EP1016759 A1 EP 1016759A1 EP 99124258 A EP99124258 A EP 99124258A EP 99124258 A EP99124258 A EP 99124258A EP 1016759 A1 EP1016759 A1 EP 1016759A1
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EP
European Patent Office
Prior art keywords
deep vibrator
angular position
vibrator
deep
deflection
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Withdrawn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
EP99124258A
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German (de)
English (en)
Inventor
Johannes Dr.-Ing. Köcher
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.)
Keller Grundbau GmbH
Original Assignee
Keller Grundbau 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 Keller Grundbau GmbH filed Critical Keller Grundbau GmbH
Publication of EP1016759A1 publication Critical patent/EP1016759A1/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Withdrawn legal-status Critical Current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
    • E02D1/00—Investigation of foundation soil in situ
    • E02D1/02—Investigation of foundation soil in situ before construction work
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/054—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil involving penetration of the soil, e.g. vibroflotation

Definitions

  • the invention relates to a method for improving a Soil under determination of the degree of compaction, in which a tubular deep vibrator brought vertically into the ground is that by means of a deep vibrator about a longitudinal axis of the deep vibrator driven rotating unbalance mass accelerated in relation to a horizontal plane on a vibratory circular path becomes.
  • the power consumption of the vibrator motor for driving the unbalance and above concluded on the degree of compaction of the soil.
  • the soil properties must be determined before compaction in order to achieve a maximum based on empirical values To be able to determine the energy consumption of the vibrator motor at which can be assumed to have sufficient compression of the ground has been reached.
  • the power consumption is however depending on the type of vibrator, so that specific Empirical values must be formed.
  • the degree of compaction over the amount of the addition material for backfilling the resulting from the shaking Funnel can be determined in the ground. Both mentioned However, procedures are very rough and can be done by local Deviations in the previously determined soil properties are strong to be influenced.
  • the object of the present invention is a method of provide the type mentioned, with which during the Vibration process statements about the degree of compaction of a building ground can be made and the shaking process depending the data determined in this way is controlled.
  • the object is achieved in that a lead angle between the angular position of the deep vibrator deflection on the vibrating orbit and the angular position of the Imbalance mass determined in the deep vibrator in a horizontal plane becomes.
  • the lead angle serves as a parameter for the determination the degree of compaction, with a decreasing lead angle on a decreasing compaction performance of the deep vibrator and indicates an increasing degree of compaction of the subsoil.
  • Dependence on the lead angle as a parameter for the degree of compaction is the deep vibrator brought into the ground Compaction performance controlled.
  • the deep vibrator moves in relation to a horizontal plane on a vibrating circuit.
  • the deep vibrator tumbles around a zero point on a longitudinal axis of the deep vibrator lies.
  • the vibrating orbit has diameters of different sizes on.
  • it is not to determine the lead angle a quantitative determination of the deep vibrator's deflection required in the horizontal plane, only the Direction of deflection.
  • the position of the selected measuring level is therefore irrelevant for determining the lead angle. You may however, do not go through the zero point. Because the zero point through constructive measures on the deep vibrator as far as possible in the area the coupling between the deep vibrator and the pipe string on which the deep vibrator is attached, is placed, a measuring level if possible provided at the lower end of the deep vibrator.
  • a loose, non-compacted soil reacts largely plastically to the excitement of the deep vibrator.
  • the grounding process becomes denser and reacts less plastically and more elastic.
  • With an ideally compacted soil the reaction would be linearly elastic.
  • the deep vibrator therefore initially does the work of pushing away of the soil in a radial direction.
  • the share of compaction performance in total performance thus becomes lower. This causes the lead angle between the angular position of the unbalance mass and the deflection of the deep vibrator becomes smaller. With an ideal Circular path of the deep vibrator without output for compaction the lead angle is zero.
  • the lead angle is defined so that that in a horizontal Flat angle, which is from a first straight line, the through the center of the vibrating circular path and through the longitudinal axis of the deep vibrator in the deflected state, and of a second straight line that runs through the longitudinal axis of the deep vibrator in the deflected state and by the focus of the Unbalanced mass runs, is included, is determined.
  • a pulse that by means of a pulse generator at a certain angular position the unbalanced mass is generated, a measurement of the Angular position of the deflection of the deep vibrator in at least triggers a measuring level.
  • the angular position of the deflection of the deep vibrator in the Measuring plane can be determined with a pair of accelerometers be, the accelerometers on a Measurement plane are arranged and the acceleration in two vertical and measure planes perpendicular to each other. It can a second pair of accelerometers is also provided be, with the accelerometers on another Measurement plane are arranged and the acceleration in two Measure vertical and perpendicular planes.
  • the deep vibrator is preferably used after reaching a final depth gradually shaking out of the ground at vibrating intervals drawn, the vibration intervals when falling below a predetermined minimum lead angle are ended.
  • the compaction effect of the vibrator can therefore be immediate be reacted to. If the desired one is reached early The degree of compaction is thus interrupted, so that the process is highly economical.
  • the deep vibrator can be reached after reaching a final depth pulled continuously and shaking from the ground and the speed, with the deep vibrator pulled out of the ground becomes inversely proportional to the course of the size of the lead angle be managed.
  • the invention is also based on the object of a deep vibrator to create data with during the jogging process can be determined via the degree of compaction of a subsoil can and with which the shaking process depending on the so determined data can be regulated.
  • a deep vibrator with a essential tubular vertically arranged housing, with one arranged in the housing about a longitudinal axis of the housing rotatingly driven unbalanced mass, with means for determining the angular position of the unbalance mass in the deep vibrator and with at least one pair of accelerometers, which in a measuring plane with measuring axes lying at right angles to each other are arranged and with those based on the measured accelerations the angular position of the deflection of the deep vibrator the vibrating circular path can be determined.
  • A is preferred another pair of accelerometers are provided, which in a further measuring plane with perpendicular to each other Measuring axes are arranged and with those based on the measured Accelerations the angular position of the deep vibrator deflection can be determined on the Rüttler circuit.
  • a favorable further training includes a pulse generator, which at a measurement at a certain angular position of the unbalance mass triggered by the accelerometer.
  • An evaluation and control unit is preferably provided, with depending on a lead angle between the angular position the deflection of the deep vibrator on the vibratory circuit and the angular position of the unbalance mass that of the deep vibrator Compaction performance brought into the subsoil can be regulated is.
  • Figure 1 shows an essentially cylindrical deep vibrator 1 with a longitudinal axis 2. At an upper end is the deep vibrator 1 with an elastic coupling element 3 coaxially a pipe string 4 arranged and connected to this.
  • the Pipe linkage 4 can be used with the deep vibrator 1 in a building ground Insert vertically.
  • the deep vibrator 1 comprises a cylindrical housing 5 in which a shaft 6 is mounted coaxially to the longitudinal axis 2 via roller bearings 7, 8 is.
  • the shaft 6 is with a shaft journal 9 of an electric motor 10 connected to drive the shaft 6.
  • an unbalanced mass 11 is firmly connected to it.
  • circumferentially distributed swords 12 arranged prevent rotation of the housing 5 in the ground.
  • the shaft 6 with the unbalance mass 11 from the electric motor 12 driven in rotation To bring the deep vibrator 1 into the ground or around the Compact the ground with the deep vibrator 1 installed in the ground, the shaft 6 with the unbalance mass 11 from the electric motor 12 driven in rotation.
  • the deep vibrator 1 leads a wobble around a zero point, the zero point lies on the longitudinal axis 2 of the deep vibrator 1.
  • the deep vibrator 1 is designed so that the zero point is as close as possible of the elastic coupling element 3. This prevents that the movement of the deep vibrator 1 on the pipe string 4 is transmitted.
  • the deep vibrator 1 executes a circular path movement, the longitudinal axis moving on a vibratory circular path. By this movement of the deep vibrator 1, the building ground in Borehole compressed.
  • Both in the area of the upper end and in the area of the lower End of the deep vibrator 1 are each in the housing 5 A pair of accelerometers 13, 13 ', 14, 14' are arranged.
  • Each pair of accelerometers 13, 13 ', 14, 14' is in a measuring plane 21, 22 arranged, the measuring axes of the accelerometers 13, 13 ', 14, 14' of a pair at right angles are arranged to each other.
  • Using the accelerometer 13, 13 ', 14, 14' is the direction of the deflection of the Deep vibrator 1 determined. In principle, the Direction of deflection a pair of accelerometers 14, 14 'sufficient.
  • two pairs of accelerometers 13, 13 ', 14, 14' can also Waveform, i.e.
  • the deflection of the deep vibrator 1 is measured by a Pulse generator 15 initiated.
  • the pulse generator 15 can for example, a proximity switch that one Triggers as soon as a cam or a groove that matches the Imbalance mass 11 rotates, passes the proximity switch.
  • FIG. 2 shows the deep vibrator according to FIG. 1 in a cross section along the section line II-II.
  • the electric motor 10 is arranged coaxially to the longitudinal axis 2.
  • the housing 5 On the inner surface of the housing 5 are two accelerometers 13, 13 'attached in a first measuring plane.
  • the measuring axes X, Y of the accelerometers 13, 13 ' lie in the sectional plane and are arranged at right angles to each other.
  • Figure 3 shows a schematic representation of the deep vibrator 1 in a cross section along the section line III-III. Matching components have the same reference numerals as provided in Figure 1. On the associated description Referred.
  • Figure 3 shows the vibration of the deep vibrator 1 in a horizontal Plane that coincides with the cutting plane.
  • the Longitudinal axis 2 of the deep vibrator 1 moves in the horizontal Level on a vibratory circular path 17.
  • the vibratory circular path 17 shows the path on which the longitudinal axis 2 of the deep vibrator 1 is moved in the horizontal plane. If the deep vibrator 1 has a compaction performance for compaction of the soil, there is a lead angle ⁇ between the direction of the deflection of the deep vibrator 1 on the Haittlernikbahn 17 and the direction of the position of the unbalanced mass 11 in the deep vibrator 1.
  • the lead angle ⁇ can be between a first straight line 18, which passes through the center 19 of the vibrating orbit 17 of the deep vibrator 1 and the longitudinal axis 2 of the Deep vibrator 1 runs in the vibrating state, and one second straight line 20 through the longitudinal axis 2 of the deep vibrator 1 in the vibrating state and the center of gravity 16 of the unbalanced mass 11 runs, determine.
  • a free vibration of the deep vibrator 1 are the first straight line 18 and the second Just 20 each other, so that the lead angle Vor the value zero assumes. If the deep vibrator 1 carries out compaction work, the unbalanced mass 11 runs ahead and the first straight line 18 and the second straight line 20 includes a lead angle ⁇ .
  • the Lead angle ⁇ is therefore a parameter for the degree of compression, depending on the lead angle ⁇ that of the deep vibrator 1 compaction performance introduced into the subsoil is controlled.
  • FIG. 4 shows the course of the lead angle ⁇ over time t in the event that the deep vibrator is pulled out of the ground shaking in shaking intervals step by step after reaching an end depth.
  • the deep vibrator is at the final depth and the lead angle ⁇ has a maximum value.
  • the lead angle ⁇ steadily decreases due to increasing compaction of the subsoil.
  • a predetermined limit value ⁇ min is reached.
  • the deep vibrator is then pulled a bit from the ground in the period from time B to time C.
  • time C the deep vibrator reaches a depth at which the subsoil is not yet compacted and the lead angle ⁇ again assumes a maximum value.
  • the lead angle ⁇ analogously to the first vibration interval decreases steadily until the limit value ⁇ min is reached again at time D and from time D to time E, the deep vibrator is one more piece from the Soil pulled. Further vibration intervals follow until the subsoil is compacted over the desired depth range.
  • the diagram in FIG. 5 shows the course of the lead angle ⁇ and the course of the drawing speed V over the depth T in the event that the deep vibrator is continuously shaken from the ground.
  • the depth T decreases from left to right on the horizontal axis.
  • the final depth F of the deep vibrator is therefore shown on the left in the diagram.
  • the deep vibrator is operated in a shaking manner without the deep vibrator being pulled out of the ground.
  • the lead angle ⁇ decreases continuously with increasing degree of compression until a minimum lead angle ⁇ min is reached.
  • the deep vibrator is then continuously pulled out of the ground at an initially constant pulling speed. It can be seen that the lead angle ⁇ changes during the drawing. In the example shown, the lead angle ⁇ initially increases continuously until a maximum value ⁇ max is reached.
  • the lead angle ⁇ again decreases continuously until a minimum value ⁇ min is reached and the drawing speed V is increased again in depth H.
  • the lead angle ⁇ is thus kept between the two limit values ⁇ max and ⁇ min by reducing the drawing speed V in the depth F and increasing the drawing speed V in the depth K again, so that the degree of compression does not exceed a maximum degree of compression and a minimum degree of compression not less. This is controlled via the pulling speed. At a high drawing speed, low compaction performance is introduced into a soil layer, whereas at a lower drawing speed, a higher compaction performance is introduced into a soil layer.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP99124258A 1998-12-29 1999-12-04 Méthode et dispositif d'amélioration du sol de fondation avec détermination du degré de compaction Withdrawn EP1016759A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19859962 1998-12-29
DE1998159962 DE19859962C2 (de) 1998-12-29 1998-12-29 Verfahren und Vorrichtung zur Verbesserung eines Baugrundes unter Ermittlung des Verdichtungsgrades

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EP1016759A1 true EP1016759A1 (fr) 2000-07-05

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EP99124258A Withdrawn EP1016759A1 (fr) 1998-12-29 1999-12-04 Méthode et dispositif d'amélioration du sol de fondation avec détermination du degré de compaction

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1295994A3 (fr) * 2001-09-20 2003-08-20 KELLER GRUNDBAU GmbH Méthode pour déterminer le degré de compaction d'une fondation
EP1462575A2 (fr) * 2003-03-27 2004-09-29 Joachim Dip.-Ing. Heisler Procedée de compaction du sol à l'aide d'un vibrofonceur
WO2016102433A1 (fr) * 2014-12-23 2016-06-30 Rsm Grundbau Gmbh + Willi Meyer Bauunternehmen Gmbh In Gbr Amortisseur de vibrations pour articulation d'accouplement d'un dispositif de vibration en profondeur
EP3517687A1 (fr) * 2018-01-26 2019-07-31 Keller Holding GmbH Procédé de détection et de commande de compactage lors du compactage d'un sol au moyen d'un vibreur en profondeur
EP3533932A1 (fr) * 2018-03-01 2019-09-04 BAUER Spezialtiefbau GmbH Procédé et système permettant d'ériger un élément de fondation dans le sol
CN111912965A (zh) * 2019-05-08 2020-11-10 中航天建设工程有限公司 一种建筑结构复杂节点混凝土振捣密实度检测装置
CN113216126A (zh) * 2021-04-19 2021-08-06 中国科学院武汉岩土力学研究所 一种高填方边坡多维度深部变形监测方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10115107A1 (de) * 2001-03-27 2002-10-31 Wilhelm Degen Tiefenrüttler
DE102014019140A1 (de) * 2014-12-23 2016-06-23 Rsm Grundbau Gmbh + Willi Meyer Bauunternehmen Gmbh In Gbr Schmiermittelsystem zur Schmierung eines Lagers einer Welle eines Tiefenrüttlers
DE102016120382A1 (de) 2016-10-26 2018-04-26 Gmb Gmbh Methode, Prinzip, Steuerung und Ausrüstung zur Durchführung der selbsttätigen Verdichtung von mehrphasigen Korngemischen

Citations (5)

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DE1634616A1 (de) * 1965-02-10 1970-07-16 Stothert & Pitt Ltd Verfahren und Vorrichtung zum Bestimmen der mit Ruettelmaschinen erreichten Verdichtung eines Materials
US4330738A (en) * 1977-05-09 1982-05-18 Albaret S.A. Method and apparatus for controlling the frequency of vibration imparted to the ground by a compacting machine
DE3336364A1 (de) * 1983-10-06 1985-04-18 VEB Baumaschinen Gatersleben Sitz Aschersleben, DDR 4320 Aschersleben Verfahren zur bestimmung des verdichtungsabbruchs bei vibrationsmaschinen
DE4130339A1 (de) 1991-09-12 1993-03-25 Keller Grundbau Gmbh Verfahren zur verbesserung eines baugrundes
DE19628769A1 (de) * 1996-07-17 1996-12-12 Bul Sachsen Gmbh Einrichtung und Verfahren zur Tiefenverdichtung von bindigem und nichtbindigem Verdichtungsgut (z. B. Lockergestein) und/oder zur Bestimmung des Verdichtungszustandes des Verdichtungsgutes und seines räumlichen und zeitlichen Verhaltens

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DE3707648C2 (de) * 1987-03-10 1996-02-29 Abg Werke Gmbh Verfahren und Vorrichtung zum Bestimmen des Verdichtungsgrads beim Verdichten eines Untergrundes mittels einer Vibrationswalze

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1634616A1 (de) * 1965-02-10 1970-07-16 Stothert & Pitt Ltd Verfahren und Vorrichtung zum Bestimmen der mit Ruettelmaschinen erreichten Verdichtung eines Materials
US4330738A (en) * 1977-05-09 1982-05-18 Albaret S.A. Method and apparatus for controlling the frequency of vibration imparted to the ground by a compacting machine
DE3336364A1 (de) * 1983-10-06 1985-04-18 VEB Baumaschinen Gatersleben Sitz Aschersleben, DDR 4320 Aschersleben Verfahren zur bestimmung des verdichtungsabbruchs bei vibrationsmaschinen
DE4130339A1 (de) 1991-09-12 1993-03-25 Keller Grundbau Gmbh Verfahren zur verbesserung eines baugrundes
DE19628769A1 (de) * 1996-07-17 1996-12-12 Bul Sachsen Gmbh Einrichtung und Verfahren zur Tiefenverdichtung von bindigem und nichtbindigem Verdichtungsgut (z. B. Lockergestein) und/oder zur Bestimmung des Verdichtungszustandes des Verdichtungsgutes und seines räumlichen und zeitlichen Verhaltens

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1295994A3 (fr) * 2001-09-20 2003-08-20 KELLER GRUNDBAU GmbH Méthode pour déterminer le degré de compaction d'une fondation
EP1462575A2 (fr) * 2003-03-27 2004-09-29 Joachim Dip.-Ing. Heisler Procedée de compaction du sol à l'aide d'un vibrofonceur
EP1462575A3 (fr) * 2003-03-27 2006-03-29 Joachim Dip.-Ing. Heisler Procedée de compaction du sol à l'aide d'un vibrofonceur
WO2016102433A1 (fr) * 2014-12-23 2016-06-30 Rsm Grundbau Gmbh + Willi Meyer Bauunternehmen Gmbh In Gbr Amortisseur de vibrations pour articulation d'accouplement d'un dispositif de vibration en profondeur
EP3517687A1 (fr) * 2018-01-26 2019-07-31 Keller Holding GmbH Procédé de détection et de commande de compactage lors du compactage d'un sol au moyen d'un vibreur en profondeur
US10385530B1 (en) 2018-01-26 2019-08-20 Keller Holding Gmbh Method for compaction detection and control when compacting a soil with a deep vibrator
EP3533932A1 (fr) * 2018-03-01 2019-09-04 BAUER Spezialtiefbau GmbH Procédé et système permettant d'ériger un élément de fondation dans le sol
WO2019166153A1 (fr) * 2018-03-01 2019-09-06 Bauer Spezialtiefbau Gmbh Procédé et système de construction d'un élément de fondation dans le sol
US12104342B2 (en) 2018-03-01 2024-10-01 Bauer Spezialtiefbau Gmbh Method and system for producing a foundation element in the ground
CN111912965A (zh) * 2019-05-08 2020-11-10 中航天建设工程有限公司 一种建筑结构复杂节点混凝土振捣密实度检测装置
CN113216126A (zh) * 2021-04-19 2021-08-06 中国科学院武汉岩土力学研究所 一种高填方边坡多维度深部变形监测方法

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Publication number Publication date
DE19859962C2 (de) 2001-07-12
DE19859962A1 (de) 2000-07-13

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