WO1997034054A1 - Procede de protection du sol contre les pollutions et structure de sol pour proteger le sol - Google Patents

Procede de protection du sol contre les pollutions et structure de sol pour proteger le sol Download PDF

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Publication number
WO1997034054A1
WO1997034054A1 PCT/NL1997/000123 NL9700123W WO9734054A1 WO 1997034054 A1 WO1997034054 A1 WO 1997034054A1 NL 9700123 W NL9700123 W NL 9700123W WO 9734054 A1 WO9734054 A1 WO 9734054A1
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WO
WIPO (PCT)
Prior art keywords
layer
water
weight
soil structure
soil
Prior art date
Application number
PCT/NL1997/000123
Other languages
English (en)
Dutch (nl)
Inventor
Jacobus Cornelis Wammes
Oszkár Libor
Original Assignee
Aannemingsbedrijf Van Den Biggelaar Limburg B.V.
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 Aannemingsbedrijf Van Den Biggelaar Limburg B.V. filed Critical Aannemingsbedrijf Van Den Biggelaar Limburg B.V.
Priority to AU20458/97A priority Critical patent/AU2045897A/en
Publication of WO1997034054A1 publication Critical patent/WO1997034054A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features
    • B65D90/24—Spillage-retaining means, e.g. recovery ponds

Definitions

  • a method for protecting the soil against contaminations and a soil structure for protecting the soil is provided.
  • the invention relates to a method for protecting the soil against contamination caused by the contents of a storage tank present in or on the ground by applying a sealing system forming a seal at the bottom side of the storage tank being placed in adjoining relationship with the surface of the storage tank present in or on the ground.
  • the invention furthermore relates to a soil structure for protecting the soil against contamination caused by the contents of a storage tank present in or on the ground.
  • a structure of this type is known per se from European Patent Application No. 0 456 094, which not only discloses a structure of soil layers, but also a cable provided therein for delivering a signal if the storage tank exhibits a leak and the contents of the tank find their way into the soil.
  • an impervious 'layer or a foil which is impervious to the liquid in the storage tank is provided on a foundation consisting of asphalt, sand, concrete or the like.
  • Practice has taught, however, that a comparatively rigid layer of asphalt or concrete may exhibit cracks, as a result of which the liquid from the storage tank may find its way into the soil layer to be protected.
  • a foil provides insufficient protection, whilst sand or the like will become permeable after some time.
  • the method according to the invention is characterized in that the sealing system is built up of one or more layers, of which the sealing layer 3 consists of a smectite and polymer-containing, water- moisturized layer which is substantially impervious to water and to hydrocarbons.
  • a layer 1 which ensures a proper contact between the soil structure and the storage tank surface.
  • Said layer 1 adjoining the bottom surface of the storage tank consists of an oil- impregnated pulverized mineral having a hydrophobic surface. The use of layer 1 will lead to a satisfactory adhesion between the storage tank surface and the layer provided thereunder, and the hydrophobic nature of the material being used will provide a water- repellent effect.
  • a sealing system which is built up of three layers, namely: a) a layer 1 of an oil-impregnated pulverized mineral having a hydrophobic surface, which adjoins the bottom surface of the storage tank; b) a layer 2 of a particulate silicate compound, which is provided under layer 1; and c) a polymer and smectite-containing water-moisturized layer 3 being impervious to water and to hydrocarbons, which is provided under layer 2.
  • the smectite-containing layer referred to under c) is built up of a smectite-containing mixture of clay or a smectite-containing natural stone type, which contains more than 0.5 % by weight of one or more solid inert filler(s) having an average particle size larger than 0.05mm, 0.8-6.0 % by weight of a powdered solid activating agent and more than 0.2 % by weight of a water-soluble polymer, whereby the weight percentages have been calculated on the basis of the amount of smectite present in the mixture.
  • a smectite-containing composition of this kind is known from W094/18284.
  • Said PCT patent application does not disclose the method for protecting the soil against contamination caused by the contents of a storage tank present in the ground. Besides this the smectite and polymer comprising material has been applied in a dry way and will then be moisturized by the contaminated water according to said patent application, while moisturizing according to the present process takes place after applying the layer. Nor can a soil structure as disclosed in the present patent application be derived from said patent application.
  • a layer which (1) contains a mineral clay selected from smectites having a three-layer structure and/or expansible silicates, which may be partially activated with 1 % by weight (based on the weight of the mineral clay) of an activating agent selected from (i) an alkali metal or ammonium salts comprising an anion which forms water-insoluble precipitates with alkaline-earth metal ions and (ii) a smectite which is overactivated with salts of this type, and (2) at least 0.6 % by weight (based on the weight of the mineral clay) of a water-soluble polymer which is capable of reacting with said clay and which has a molecular weight of 50,000 - 20,000,000, which mixture may form a gel which is capable of absorbing and releasing water after the addition of 1 - 5 % by weight (based on the weight of the mineral clay) of an activating agent selected from (i) an alkali metal or ammonium salts
  • a mixture of this kind is known per se from EP-A-0 335 653.
  • European patent application a method is known for preparing a gel which is capable of absorbing and releasing water, but it is known from said patent application to use a mixture of this kind as one of the layers in a soil structure for protecting the soil against leakage of hydrocarbons from a storage tank present in the ground.
  • a large part of the equipment used for transporting or storing hydrocarbons, such as various pipes and reservoirs, is placed on the ground or surrounded by the ground. An important requirement is that such equipment is effectively sealed in order to prevent contamination of the soil.
  • the seal In order to provide an effective protection several requirements must be met, such as the fact that the seal must protect the metal of the reservoir from the corrosive influence of aqueous mixtures, which may be achieved by preventing the reservoir from coming into contact with the water present in the ground. Furthermore the reservoir seal must have sufficient load-bearing capacity in order to be able to bear the heavy load, and be sufficiently flexible in order to be able to absorb any movements, both of the ground and of the reservoir. Furthermore the soil structure providing a seal ing effect must provide sufficient isolation from hydrocarbons which are present in the reservoir and which may leak therefrom. The above objectives may be accomplished by using a method according to the invention or by using a soil structure according to the invention. The invention will be explained in more detail hereafter with reference to the appended drawing, in which:
  • Figure 1 shows a soil structure according to the invention. The construction shown in Figure 1 will be explained in more detail hereafter.
  • a system of layers 1, 2 and 3 as described above is provided under bottom 8, whereby a textile cloth 5 may be provided between layers 2 and 3 and/or between layers 1 and 2. Furthermore a drainage 4 may be provided between layers 2 and 3. Said drainage may also be provided between layers 1 and 2.
  • the new system for the soil structure according to the invention is in particular suitable for sealing the metal hydrocarbons- containing reservoirs against corrosion caused by the ground, more in particular against the corrosive action of the ground water.
  • the soil structure is sufficiently flexible to absorb any movements of the ground and it effectively prevents hydrocarbons that may leak out from finding their way into the soil layers which are protected against contamination.
  • the soil structure consists of several layers, preferably three layers, with the upper layer, which is in contact with the bottom or the wall of the reservoir, consisting of an oil-impregnated pulverized mineral having a hydrophobic surface.
  • Said mineral preferably contains a corrosion inhibitor, in particular an oil- soluble amine compound.
  • Said layer 1 has a layer thickness of at least 0.3 cm, preferably of 4 - 6 cm. Layer 1 may also be mixed with a particulate silicate.
  • the middle layer 2 contains a particulate silicate, which is preferably mixed with a pulverized mineral having a hydrophobic surface. No oil has been added thereto, however. Said layer may also contain a solid silicate. When no pulverized mineral is added said layer may function as a drainage layer. Furthermore a drain pipe made of plastic material, such as polyethylene, may be provided.
  • the second layer has a thickness of more than 1 cm, preferably 5 - 30 cm. Said layer 2 functions to take up the load applied by the container and to absorb any movements of the ground.
  • the pulverized mineral having a hydrophobic surface that is added functions to absorb hydrocarbons that may leak out and to prevent ground water from permeating upwards.
  • the hydrophilic moisturized part of layer 3 forms a seal against the hydrocarbons that may leak out, so that any hydrocarbons leaking out are prevented from finding their way into soil layer 6. It furthermore forms a cohesive flexible layer, which can readily follow the deformations of the soil.
  • a textile cloth 5, which is preferably moisturized with water, may be provided in particular between layers 2 and 3.
  • Said textile cloth (geotextile) ensures a uniform distribution of the load over the respective layers and an adequate separation of said layers. In principle this cloth may be provided between all layers.
  • the upper layer 1 of the soil structure according to the invention consists of an oil-impregnated pulverized mineral having a hydrophobic surface, which may contain a corrosion inhibitor.
  • Hydrophobic surface minerals include talcum, Manusil (trademark) and pulverized oil- bearing materials. Furthermore mixtures of two or more such pulverized minerals may be used.
  • the mineral oil which is added to the pulverized mineral is preferably a liquid or semi-solid hydrocarbon comprising more than 10 carbon atoms, or a mixture thereof.
  • oil is also understood to include oil mixtures. Examples of semi-solid hydrocarbons are bitumen and wax.
  • the impregnating oil must be used in such an amount that a fine coating of oil on the pulverized mineral particles is obtained, whereby the mineral can still be readily processed.
  • corrosion inhibitors to be added which are compatible with the oil system and which are added to layer 1 are oil-soluble amines such as Nalco 192 and 169, Nalcamin, Cronox 100 and Dodigen 213. It is also possible to add the corrosion inhibitor only to the upper part of layer 1, this with a view to reducing costs.
  • Layer 2 consists of particulate silicate, preferably mixed with a pulverized mineral having a hydrophobic surface.
  • the pulverized mineral having the hydrophobic surface may be one of the substances that are used in layer 1.
  • Particulate silicates are sand, gravel and pulverized siliceous asphalt such as pulverized bricks or roof tiles.
  • the particulate silicate itself may be a mixture of such materials.
  • Layer 2 may also function as a drainage layer.
  • Layer 3 of the soil structure according to the invention is a clay and polymer-containing mixture as described in the aforesaid PCT patent application W094/18284 or in EP-A-0 335 653. Besides the active components, layer 3 may also contain an inert filler. Part of the bottom layer must be moisturized, so that the wet, flexible and hydrophilic layer thus formed provides a seal against hydrocarbons leaking out and rising ground water.
  • the thickness of the moisturized layer is in particular more than 3 mm.
  • layer 2 consists of two sublayers 2.1 and 2.2, whereby sublayer 2.1 consists of a mixture of a particulate silicate compound and a pulverized mineral having a hydrophobic surface, and whereby sublayer 2.2 consists of a particulate silicate compound.
  • layer 3 may be composed of two sublayers 3.1 and 3.2, whereby the sublayer 3.1 adjacent to layer 2 has a low content of inert, solid filler and sublayer 3.2 has a higher content of inert, solid filler.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un procédé de protection du sol contre les pollutions induites par le contenu d'un réservoir de stockage présent dans ou sur le sol. Ledit procédé consiste à former un système d'étanchéité au niveau du côté inférieur du réservoir de sorte qu'il soit adjacent à la surface du réservoir de stockage présent sur ou dans le sol. Ledit système d'étanchéité est constitué d'une ou plusieurs couches, une couche d'étanchéité consistant en une couche de smectite et de polymère humidifiée avec de l'eau et sensiblement étanche à l'eau et aux hydrocarbures. L'invention porte également sur une structure de sol destinée à protéger le sol des infiltrations d'hydrocarbures.
PCT/NL1997/000123 1996-03-12 1997-03-11 Procede de protection du sol contre les pollutions et structure de sol pour proteger le sol WO1997034054A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU20458/97A AU2045897A (en) 1996-03-12 1997-03-11 A method for protecting the soil against contaminations and a soil structure for protecting the soil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1002581A NL1002581C2 (nl) 1996-03-12 1996-03-12 Werkwijze voor het beschermen van de bodem tegen verontreinigingen en grondconstructie voor het beschermen van de bodem.
NL1002581 1996-03-12

Publications (1)

Publication Number Publication Date
WO1997034054A1 true WO1997034054A1 (fr) 1997-09-18

Family

ID=19762479

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1997/000123 WO1997034054A1 (fr) 1996-03-12 1997-03-11 Procede de protection du sol contre les pollutions et structure de sol pour proteger le sol

Country Status (3)

Country Link
AU (1) AU2045897A (fr)
NL (1) NL1002581C2 (fr)
WO (1) WO1997034054A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2583762A1 (fr) 2011-10-21 2013-04-24 Snf Sas Nouveau procede de couverture temporaire de sols contamines
CN106245687A (zh) * 2016-08-16 2016-12-21 西北农林科技大学 一种利用防渗膜防止排土场薄层土体水渗漏的方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH466142A (de) * 1967-01-16 1968-11-30 Mannesmann Ag Lagertank, insbesondere Heizöltank
EP0082629A2 (fr) * 1981-12-21 1983-06-29 American Colloid Company Etanchement de dépressions de terrain contre des infiltrations de liquides
DE3717884A1 (de) * 1987-05-27 1988-12-22 Dyckerhoff & Widmann Ag Anordnung zum zurueckhalten der schadstoffe aus schadstoffhaltigen deponie-sickerwaessern
EP0335653A1 (fr) * 1988-03-28 1989-10-04 Altalanos Iparfejlesztesi Rt. Méthode de préparation de gels à partir d'argiles minérales et de polymères, capables d'absorber réversiblement de l'eau
DE9012360U1 (fr) * 1990-08-29 1990-12-06 Rotan Rohrleitungsbau-Tanksanierungs-Anlagenbau Gmbh, 6701 Dannstadt, De
EP0456094A2 (fr) * 1990-05-11 1991-11-13 W.L. Gore & Associates GmbH Réservoir à fond plat
EP0563453A1 (fr) * 1992-04-02 1993-10-06 NAUE-FASERTECHNIK GMBH & CO. KG Méthode de fabrication d'un revêtement imperméable à l'eau et/ou à l'huile, contenant de l'argile gonflante
WO1994018284A1 (fr) * 1993-02-03 1994-08-18 Aannemingsbedrijf Van Den Biggelaar Limburg B.V. Melange contenant de l'argile, melange permettant de former un gel resistant a l'humidite, et utilisation de ces melanges

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH466142A (de) * 1967-01-16 1968-11-30 Mannesmann Ag Lagertank, insbesondere Heizöltank
EP0082629A2 (fr) * 1981-12-21 1983-06-29 American Colloid Company Etanchement de dépressions de terrain contre des infiltrations de liquides
DE3717884A1 (de) * 1987-05-27 1988-12-22 Dyckerhoff & Widmann Ag Anordnung zum zurueckhalten der schadstoffe aus schadstoffhaltigen deponie-sickerwaessern
EP0335653A1 (fr) * 1988-03-28 1989-10-04 Altalanos Iparfejlesztesi Rt. Méthode de préparation de gels à partir d'argiles minérales et de polymères, capables d'absorber réversiblement de l'eau
EP0456094A2 (fr) * 1990-05-11 1991-11-13 W.L. Gore & Associates GmbH Réservoir à fond plat
DE9012360U1 (fr) * 1990-08-29 1990-12-06 Rotan Rohrleitungsbau-Tanksanierungs-Anlagenbau Gmbh, 6701 Dannstadt, De
EP0563453A1 (fr) * 1992-04-02 1993-10-06 NAUE-FASERTECHNIK GMBH & CO. KG Méthode de fabrication d'un revêtement imperméable à l'eau et/ou à l'huile, contenant de l'argile gonflante
WO1994018284A1 (fr) * 1993-02-03 1994-08-18 Aannemingsbedrijf Van Den Biggelaar Limburg B.V. Melange contenant de l'argile, melange permettant de former un gel resistant a l'humidite, et utilisation de ces melanges

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2583762A1 (fr) 2011-10-21 2013-04-24 Snf Sas Nouveau procede de couverture temporaire de sols contamines
CN106245687A (zh) * 2016-08-16 2016-12-21 西北农林科技大学 一种利用防渗膜防止排土场薄层土体水渗漏的方法

Also Published As

Publication number Publication date
NL1002581C2 (nl) 1997-09-15
AU2045897A (en) 1997-10-01

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