EP1375753A2 - Procédé de compaction du sol - Google Patents

Procédé de compaction du sol Download PDF

Info

Publication number
EP1375753A2
EP1375753A2 EP03009774A EP03009774A EP1375753A2 EP 1375753 A2 EP1375753 A2 EP 1375753A2 EP 03009774 A EP03009774 A EP 03009774A EP 03009774 A EP03009774 A EP 03009774A EP 1375753 A2 EP1375753 A2 EP 1375753A2
Authority
EP
European Patent Office
Prior art keywords
seismic
vibrations
compacting
dynamic
soil
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.)
Granted
Application number
EP03009774A
Other languages
German (de)
English (en)
Other versions
EP1375753A3 (fr
EP1375753B1 (fr
Inventor
Kazimierz Bylica
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.)
Geopartner Sp Zoo
Original Assignee
Geopartner Sp Zoo
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 Geopartner Sp Zoo filed Critical Geopartner Sp Zoo
Publication of EP1375753A2 publication Critical patent/EP1375753A2/fr
Publication of EP1375753A3 publication Critical patent/EP1375753A3/fr
Application granted granted Critical
Publication of EP1375753B1 publication Critical patent/EP1375753B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting

Definitions

  • the object of the invention is a method of deep soil compacting from a surface by means of seismic dynamic compacting with a use of sequences of seismic vibrations of high power and of variable parameters of vibrations depending on susceptibility of a medium to settlement, and on limitations resulting from work safety, the vibrations being sent at one vibration position by a statically loaded and vibrating stiff plate onto the soil surface.
  • the method of dynamic soil compacting from a surface known heretofore was implemented by a shallow vibratory compacting with a rolling, vibratory roll or a plate vibrator.
  • the method was commonly used at road-making and embankment-making by compacting of building base from thin layers of about 0.5 meters in depth.
  • a shallow and less energy-consuming method is implemented by providing low-power vibrations by light vibrating monochromatic plate vibrators used for compacting of subsoil for walkways, floors and other light constructions.
  • An other known method consists in a deep, impact compacting with a use of stroke caused by falling a heavy weight from a high height.
  • the impact method is commonly used for a deep, point-wise acting i.e. crater-like, dynamic soil compacting from a surface utilizing an energy of heavy weight falling from a high level.
  • the method is characterized by a high non-homogeneity of compacting and loosening at the surface caused by wedges of uplift pressure and exceeding of medium elasticity.
  • about 70% of energy of impulse of the stroke creates strong surface waves having elliptical nature of vibrations that are dangerous for buildings on embankments and for existing infrastructure. Because of strong, shearing horizontal stresses, the waves loosen the already compacted zone within a radius of several dozens up to several hundreds meters, depending on the stroke energy.
  • the method is not suitable for uniform compacting of soil and buildings on embankments, where high homogeneity of spatial compaction is required. Furthermore, the method is dangerous in case of moving and manipulating with a machinery having high extension arm, hanging heavy weight, on high, linear structures on embankments.
  • the aim of the present invention is to develop an efficient method of a deep, dynamic, homogeneous (both in terms of surface and space) soil compacting from a surface, without necessity of uncovering deeper layers or disassembling structure on embankments, safe for surrounding infrastructure and in terms of work safety.
  • the objective has been achieved by a use of a method of a deep soil compacting from a surface using seismic dynamic compacting referred to as seismo-compaction with a use of sequences of seismo-vibrations of high power and variable parameters of vibrations depending on susceptibility of a medium to settlement, and on limitations to account for work safety.
  • an energy of a single stroke impulse on the soil surface is replaced by a superposition of corresponding number of cycles of low-energetic, controlled sequences of vibrations of seismic frequencies within a range from several to several dozens of hertz, sent to a stiff plate of any shape and size contacted with a subsoil, onto which a static force of a preload load caused by a heavy weight M1 is applied, and simultaneously a dynamic load forced by a periodic force FW of defined parameters of vibration frequencies, amplitude and emission time is applied, particularly of a maximum value lower than static load Mlxg in order to maintain a permanent contact of the plate with the subsoil, and of a force direction directed always downward, also for accelerations of forcing greater then 1g, which provides cumulating of deformations under the plate and achieving fast effect of compacting and consolidation from subsequent cycles of vibrations on a given point of vibration, irrespective of a technical system to implement the way from a point to another point.
  • a generated seismic wave is a seismic moment, at the high depth, at the epicenter and propagates radial in the earth direction at the frequency of several hertz.
  • a controlled, artificial and safe, superficial source of induction of continuous seismic vibrations of suitable energetic parameters, able to soil compacting and consolidation at the near-surface zone, at any depth in the sense of engineering issues, is applied.
  • the method is based on two physical phenomena occurring in grounds:
  • a scale of settlement depends on an initial soil density, a depth of a strata to be consolidated and on a maximum shape deformation of the soil.
  • the effect of dynamic soil compacting under the plate can last a moment or not more than hours, and not days or years, as it is in the case of static, natural consolidation of a subsoil beneath the founded objects.
  • Dynamic compacting can be inefficient, when a sum of static and dynamic loading is lower than a half of carrying strength of soil. Thus the important question is a proper evaluation of susceptibility of soil to dynamic loads.
  • corresponding parameters of dynamic force in a range of many-second sequences of seismic frequencies from 5 to 100 Hz, having linear or other rate of changes are designed according to the invention. This can also include composing of mono-frequency sequences from that range, with or without the use of resonance frequencies of a vibrator-subsoil system.
  • An important economic advantage of a method according to the invention is also that it does not require expensive investment to build suitable source of vibrations, but it can be effectively implemented using an existing heavy seismic servo-hydraulic or electromagnetic vibrator.
  • the servo-hydraulic system is composed of an external mass of a static load of a plate of a weight 20 ton and more, a vibrating system consisting of a reaction mass of 1 to 3 ton, coupled with a stiff plate (hydraulic coupling through a piston rod).
  • the whole system of high-pressure hydraulics is operated electronically and a through low-pressure hydraulic system.
  • routine vibrations are carried out from one point to another, with a continuous or point-wise coverage of surface, depending on a design and a range of work.
  • such a system of vibrations in a field close to vibration source at a depth lower than a length of generated wave, generates the highest soil stresses and displacement, which further are propagated into the medium up to several kilometers in a form of seismic compression wave.
  • the vibration energy is effectively transferred far behind a zone of direct interaction of a plate on a subsoil, and can be - on the way -at any place, utilized, especially to compact soil at a near-surface zone.
EP03009774.5A 2002-05-08 2003-05-08 Procédé de compaction du sol Expired - Lifetime EP1375753B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL353767A PL198479B1 (pl) 2002-05-08 2002-05-08 Sposób głębokiego zagęszczania gruntu z powierzchni
PL35376702 2002-05-08

Publications (3)

Publication Number Publication Date
EP1375753A2 true EP1375753A2 (fr) 2004-01-02
EP1375753A3 EP1375753A3 (fr) 2005-11-23
EP1375753B1 EP1375753B1 (fr) 2015-09-09

Family

ID=29717744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03009774.5A Expired - Lifetime EP1375753B1 (fr) 2002-05-08 2003-05-08 Procédé de compaction du sol

Country Status (2)

Country Link
EP (1) EP1375753B1 (fr)
PL (1) PL198479B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9239220B2 (en) 2012-04-30 2016-01-19 Conocophillips Company Determination of near surface geophyscial properties by impulsive displacement events
CN113463609A (zh) * 2021-04-06 2021-10-01 山西机械化建设集团有限公司 一种“接力式”强夯置换处理深厚饱和软弱土地基处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4966499A (en) * 1989-12-26 1990-10-30 Fm Industries, Inc. Vibratory compactor
US5220845A (en) * 1992-04-06 1993-06-22 N.P.K. Equipment Construction, Inc. Vibratory compactor bearing lubrication
US5320448A (en) * 1992-06-05 1994-06-14 M-B-W, Inc. Drive mechanism for a vibratory compactor
US5713418A (en) * 1996-07-18 1998-02-03 Warren Power Attachments Vibratory compactor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4966499A (en) * 1989-12-26 1990-10-30 Fm Industries, Inc. Vibratory compactor
US5220845A (en) * 1992-04-06 1993-06-22 N.P.K. Equipment Construction, Inc. Vibratory compactor bearing lubrication
US5320448A (en) * 1992-06-05 1994-06-14 M-B-W, Inc. Drive mechanism for a vibratory compactor
US5713418A (en) * 1996-07-18 1998-02-03 Warren Power Attachments Vibratory compactor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9239220B2 (en) 2012-04-30 2016-01-19 Conocophillips Company Determination of near surface geophyscial properties by impulsive displacement events
CN113463609A (zh) * 2021-04-06 2021-10-01 山西机械化建设集团有限公司 一种“接力式”强夯置换处理深厚饱和软弱土地基处理方法
CN113463609B (zh) * 2021-04-06 2023-03-03 山西机械化建设集团有限公司 一种“接力式”强夯置换处理深厚饱和软弱土地基处理方法

Also Published As

Publication number Publication date
EP1375753A3 (fr) 2005-11-23
PL198479B1 (pl) 2008-06-30
PL353767A1 (en) 2003-11-17
EP1375753B1 (fr) 2015-09-09

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