EP0135478B1 - Méthode pour stabiliser le sol dans le but d'améliorer sa portance - Google Patents

Méthode pour stabiliser le sol dans le but d'améliorer sa portance Download PDF

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Publication number
EP0135478B1
EP0135478B1 EP84810421A EP84810421A EP0135478B1 EP 0135478 B1 EP0135478 B1 EP 0135478B1 EP 84810421 A EP84810421 A EP 84810421A EP 84810421 A EP84810421 A EP 84810421A EP 0135478 B1 EP0135478 B1 EP 0135478B1
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EP
European Patent Office
Prior art keywords
soil
stabilized
layer
binder
soils
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.)
Expired
Application number
EP84810421A
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German (de)
English (en)
Other versions
EP0135478A1 (fr
Inventor
Hermann Claus
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.)
Plana Engineering AG
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Plana Engineering AG
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Filing date
Publication date
Application filed by Plana Engineering AG filed Critical Plana Engineering AG
Publication of EP0135478A1 publication Critical patent/EP0135478A1/fr
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Publication of EP0135478B1 publication Critical patent/EP0135478B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
    • E01B1/001—Track with ballast
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00—General structure of permanent way
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00—Foundations for pavings
    • E01C3/04—Foundations produced by soil stabilisation
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/012—Discrete reinforcing elements, e.g. fibres
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E04C5/073—Discrete reinforcing elements, e.g. fibres
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/03—Injecting, mixing or spraying additives into or onto ballast or underground
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/05—Use of geotextiles

Definitions

  • the invention relates to a method for stabilizing soft, fine-grained soils in order to improve their load-bearing capacity, according to the preamble of claim 1.
  • Insufficiently stable soils are to be understood in particular to mean those which are highly sensitive to water and are sensitive to environmental influences such as Water ingress, changes in load, but also freezing and thawing, react with changes in volume and / or strength.
  • Stabilizations with cement or lime are known in particular, the cement or lime being added as evenly as possible before any compaction and setting or hardening undisturbed for a few days after compaction. Soils stabilized in this way are generally stable against water and frost due to sufficient resistance to water absorption after setting or hardening. However, it is disadvantageous that these methods can only be used if the processed soil has a water content well below that of the flow limit, which is not the case with soft and / or softened soils.
  • Cement- and / or lime-stabilized floors have a greater or lesser compressive strength, depending on the binder content and floor structure, but practically no tensile strength.
  • Such clods can then sink into a soft surface, or with strong dynamic stress such as in the case of railway lines, ascend to the ballast or base course by pumping action. In both cases there is a progressive reduction in the size of the stabilized soil layer and the effect desired by the stabilization becomes increasingly less.
  • German Offenlegungsschrift 31 27 350 describes a method for ground stabilization, which, however, cannot be used for the recognized difficult stabilization of fine-grained soils, especially since the known method does not mention any reinforcing elements, so that the absorption of significant tensile forces is practically impossible. Also, the soil material is merely sprayed according to this laid-open document for the purpose of impregnation, whereas there is no question of the formation of a paste-like mass which is a prerequisite for the successful implementation of the method according to the invention.
  • the object of the present invention is to propose a method for stabilizing soft, fine-grained soils, such as clayey silt, silt, fine sands and organically contaminated soils, in order to improve the load-bearing capacity of an overlying soil layer, in order to absorb the load through the grown, underlying soil without material replacement to be as "fluid” as possible, to increase work capacity and flexibility by increasing the bending tensile and shear strength within the solidified floor area and to limit the formation of cracks caused by stress and shrinkage and to prevent the spreading of the giant.
  • Another object is to achieve increased early strength properties, i.e. the ability of the stabilized soil layer to be able to absorb larger loads shortly after installation or construction.
  • the aim of the invention is a method for stabilizing soils, in which the disadvantages of previous soil stabilization methods can be effectively eliminated with relatively simple means.
  • a method is to be created which is preferably used to improve the load-bearing capacity of the subsoil of traffic routes and other mechanically stressed areas by carrying out soil stabilization even under difficult weather conditions, e.g. Allows rain. It should be possible to achieve a stable soil layer between the grown soil and a wear or load-bearing layer shortly after completion of the work.
  • FIG. 1a, b show two typical forms of application of the invention to existing civil engineering objects.
  • the first example shown (FIG. 1 a) relates to an application that can be practiced specifically but not exclusively for track maintenance.
  • the gravel and gravel case which is permeated with earth, are first removed and the soil beneath it is then processed in a local mixing process, the soil being first brought to a pulpy state by adding a mixture of water and a silicate-containing binder.
  • a large number of reinforcing particles are then added to this slurry, which should not be longer than the thickness of the soil layer and should be distributed as evenly as possible in the slurry of the soil.
  • the grown soil is expediently prepared using a tiller.
  • the solidified layer ensures good load transfer so that the entire gravel case can be omitted.
  • the usual admixture of the binders takes place in the liquid state, so that automatically a lowermost binder-free base layer 3 of 2 to 3 cm in height at a e.g. a total of 12 to 15 cm high layer 2 to be stabilized and solidified.
  • a lowermost binder-free base layer 3 of 2 to 3 cm in height at a e.g. a total of 12 to 15 cm high layer 2 to be stabilized and solidified.
  • the second example shown (FIG. 1 b) relates to an application of the method according to the invention in the construction or maintenance of low-stress roads, and in the creation of sidewalks and squares.
  • the method can also be used for the construction of the substructure of main roads in areas with unsustainable subsoil.
  • the preparation of the binder, liquid or water / earth mixture is also carried out here using the local mixing method as described above.
  • a lower-binder base layer is expediently provided.
  • binders are to be understood as meaning at least one silicate-containing binder which can be supplemented by cement or lime as required.
  • the main layer 5 made of stabilized soil material then receives a cover layer 6 in the form of a wear layer.
  • the height of the base layer 4 can advantageously be determined, for example, by means of height-adjustable means of the mixing device.
  • the reinforcement elements can consist of any shape and any flexible, rod-like or schnitzel-like, about 4 to 20 cm long reinforcement elements 7 made of an elastic, stretchable material.
  • the elements - in an at least circular configuration - should have a diameter of 4 to 10 cm.
  • Rod or needle-shaped elements according to Fig. 2c should be about 4-10 cm long.
  • the element thickness in the soil material mixture to be stabilized is selected depending on the desired load-bearing capacity, so that a reinforcing element surface proportion of more than 2% is obtained for each cut surface unit - viewed in any direction.
  • the reinforcing elements 9 should be oriented in any direction in the material mixture in order to achieve an approximately uniform anchoring effect.
  • the reinforcement elements shown in the examples according to FIGS. 2a-c have a length which at most corresponds approximately to the thickness of the bottom layer to be stabilized.
  • the cross-section of the reinforcing elements is at most about 12 m 2 to maintain the flexibility described.
  • FIG. 3 A further possibility of reinforcing a floor section that is to be stabilized and solidified for greater resilience is shown in FIG. 3.
  • a low-binder and essentially reinforcing element-free base layer 10 B. placed on a relatively wide-mesh spacing grate 11, which is shown here as a bar grate, a lattice or mesh-like sheet 12, for example a geotextile or steel wire mesh as basic reinforcement, which is penetrated by the stabilized layer. Connection The elemental reinforcement of the described type of mixture takes place.
  • a plurality of grids or net-like flat structures 12 can be embedded in the soft to viscous mixture at vertical intervals.
  • reinforcement particles according to FIGS. 2a-c are sprinkled in in all cases.
  • the soil stabilization described can also be carried out in sections during the normally relatively short breaks in operation.
  • the decisive factor is the presence of the reinforcement elements described, which are able to increase the resting time which is usually also necessary in the case of quick ties by their internal stabilization.
  • the method according to the invention brings advantages not only in those cases where rapid progress or completion of the work is important. The method offers advantages for all subsoil and slope stabilization where it is practically applicable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Claims (5)

1. Méthode pour stabiliser des sols mous à grains fins comme des silts, des sables fins, etc., sans damage, en vue d'obtenir des propriétés de résistance initiale accrue qui permettent déjà une mise en charge du sol quelques heures après la stabilisation, le sol à stabiliser étant préparé par mélange sur la place et étant mélangé à au moins un liant silicaté, caractérisée en ce que la couche de sol à stabiliser est transformée en une pâte par rapport d'un mélange d'eau et du liant silicaté, après quoi des éléments d'armature individuels, dont la dimension principale correspond tout au plus à l'épaisseur de la couche de sol à stabiliser, sont répartis en grand nombre de manière uniforme.
2. Méthode suivant la revendication 1, caractérisée en ce que les éléments d'armature (7) sont des éléments en forme de rognures ou de barrettes.
3. Méthode suivant la revendication 1, caractérisée en ce que les éléments d'armature (8) sont des éléments en forme de bagues fermées.
4. Méthode suivant la revendication 1, caractérisée en ce qu'au cours de la même opération, une couche de base à faible teneur en liant est formée entre le sol ferme et la couche à stabiliser.
5. Méthode suivant la revendication 1, caractérisée en ce qu'un article plat en forme de treillis est incorporé dans la couche à stabiliser et prend appui sur un grillage d'espacement.
EP84810421A 1983-09-01 1984-08-27 Méthode pour stabiliser le sol dans le but d'améliorer sa portance Expired EP0135478B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4806/83 1983-09-01
CH480683A CH664405A5 (de) 1983-09-01 1983-09-01 Verfahren zur stabilisierung einer bodenschicht.

Publications (2)

Publication Number Publication Date
EP0135478A1 EP0135478A1 (fr) 1985-03-27
EP0135478B1 true EP0135478B1 (fr) 1988-01-07

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EP84810421A Expired EP0135478B1 (fr) 1983-09-01 1984-08-27 Méthode pour stabiliser le sol dans le but d'améliorer sa portance

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EP (1) EP0135478B1 (fr)
CH (1) CH664405A5 (fr)
DE (1) DE3468465D1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790691A (en) * 1986-10-03 1988-12-13 Freed W Wayne Fiber reinforced soil and method
DE4013801C2 (de) * 1990-04-28 1994-12-22 Keller Grundbau Gmbh Verfahren zum Herstellen eines Trag- und/oder Abdichtungskörpers
GB2258874A (en) * 1991-08-17 1993-02-24 Peter John Town Method of forming an impervious barrier beneath a thoroughfare
ES2109657T3 (es) * 1993-08-31 1998-01-16 Plasser Bahnbaumasch Franz Procedimiento para la estabilizacion de un nivel del terreno.
AT406967B (de) * 1994-10-05 2000-11-27 Plasser Bahnbaumasch Franz Maschine zur bildung einer planumschutzschichte eines gleises
US6042305A (en) * 1997-08-15 2000-03-28 Ppg Industries Ohio, Inc. Fiber-reinforced soil mixtures
US6858593B2 (en) 2000-08-05 2005-02-22 Smithkline Beecham Corporation Anti-inflammatory androstane derivative compositions
WO2002012627A1 (fr) * 2000-08-10 2002-02-14 Ashby, David Structure multicouche destinee aux voies ferrees
DE202006019143U1 (de) * 2006-12-18 2008-04-30 Wiebe Holding Gmbh & Co. Kg Gleisbaumaschine zur Gleissanierung
CN102767128B (zh) * 2012-08-14 2014-10-29 天津二十冶建设有限公司 路基堆载土顶面标高控制施工方法
DE102014004936A1 (de) * 2014-04-05 2015-10-08 Terje Mikkelsen Verfahren und Bodenstabilisierungsmittel zur dauerhaften Bodenverfestigung von frostgefährdeten fein- und gemischtkörnigen Mineralböden zur Verwendung als hochtragfähige und frostsichere Gründungs-, Trag-, Bettungs- und Verfüllschichten im Hochbau, im Str
CN104762859B (zh) * 2015-03-17 2017-03-01 江苏花王园艺股份有限公司 山皮石处理软土路基的方法
CN106801369B (zh) * 2017-01-23 2022-04-08 合肥工业大学 一种刚柔基层双斜坡过渡结构及其施工方法
CN108642988B (zh) * 2018-06-26 2020-08-04 杭州江润科技有限公司 路堤基层病害综合处治修复结构及施工方法
CN111218861A (zh) * 2020-01-21 2020-06-02 中国铁道科学研究院集团有限公司铁道建筑研究所 控制高速铁路路基压实质量的施工方法
CN111549600A (zh) * 2020-05-06 2020-08-18 东南大学 一种深厚软基上道路拓宽交界处路基处理结构
CN112112026B (zh) * 2020-09-25 2021-09-14 西安建筑科技大学 一种防止路面塌陷的支撑结构
CN113355967A (zh) * 2021-06-04 2021-09-07 千易建设集团有限公司 一种基于bim技术的市政道路施工方法
CN114032723B (zh) * 2021-11-26 2022-08-19 山东大学 基于耐候性水凝胶路基运营期含水率与密实状态调控方法
CN116289375B (zh) * 2023-03-22 2023-09-19 黑龙江农垦建工路桥有限公司 一种适用于风化料与河砂交替填筑路基的施工方法

Citations (1)

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DE3127350A1 (de) * 1981-07-10 1983-01-27 Hans 8202 Bad Aibling Ribbert Verfahren zur befestigung und/oder stabilisierung von boeden

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FR1113604A (fr) * 1954-11-20 1956-04-03 Procédé pour armer un matériau à couler ou mouler
NL6806970A (fr) * 1968-05-17 1969-06-25
US3616589A (en) * 1968-10-31 1971-11-02 James L Sherard Fiber reinforced concrete
DE1941223A1 (de) * 1969-08-13 1971-02-25 Hendrix Hans Dr Baustoff mit hoher Schlagfestigkeit und Dauerschlagbestaendigkeit
MA18781A1 (fr) * 1979-03-23 1980-10-01 France Etat Ponts Chaussees Materiau de construction,son application pour remblai,revetement ou massif de fondation sur un sol meuble,et procede et installation de fabrication de ce materiau
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Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3127350A1 (de) * 1981-07-10 1983-01-27 Hans 8202 Bad Aibling Ribbert Verfahren zur befestigung und/oder stabilisierung von boeden

Also Published As

Publication number Publication date
DE3468465D1 (en) 1988-02-11
EP0135478A1 (fr) 1985-03-27
CH664405A5 (de) 1988-02-29

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