EP0503309A1 - Procédé pour la congélation accélérée de sol - Google Patents

Procédé pour la congélation accélérée de sol Download PDF

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Publication number
EP0503309A1
EP0503309A1 EP92102488A EP92102488A EP0503309A1 EP 0503309 A1 EP0503309 A1 EP 0503309A1 EP 92102488 A EP92102488 A EP 92102488A EP 92102488 A EP92102488 A EP 92102488A EP 0503309 A1 EP0503309 A1 EP 0503309A1
Authority
EP
European Patent Office
Prior art keywords
freezing
water
soil
earth
frozen
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Withdrawn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
EP92102488A
Other languages
German (de)
English (en)
Inventor
Bodo Marx
Daniel Müller
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim 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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0503309A1 publication Critical patent/EP0503309A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D1/00—Sinking shafts
    • E21D1/10—Preparation of the ground
    • E21D1/12—Preparation of the ground by freezing
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/02—Restraining of open water
    • E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles

Definitions

  • the invention relates to a method for accelerated freezing of soil according to the preamble of claim 1.
  • the soil around the objects is consolidated as a construction measure by freezing.
  • the freezing volume and duration of the freezing measures determine which freezing technique is preferred.
  • conventional freezing technology which works according to the refrigerator principle with a closed refrigeration cycle
  • freezing technology which uses a low-boiling, liquefied gas, usually nitrogen, as the refrigerant is working. Freezing lances are used to introduce the refrigerant and are arranged in the soil in the desired profile to be frozen.
  • DE-OS 21 56 420 shows a corresponding prior art.
  • the freezing work is integrated into the ongoing construction work and thus has an influence on the overall construction schedule.
  • follow-up works can only be carried out when the freezing work has at least largely been completed. Delays in the freezing work lead to delays or even downtimes in the subsequent plants. This leads to considerable cost increases.
  • the invention is therefore based on the object of creating a method which enables accelerated freezing of soil.
  • the invention is therefore based on the idea of pumping out the water present in the ground to be frozen, cooling it down to preferably close to 0 ° C. by means of a coolant and introducing it back into the ground.
  • the technology required for this is known per se from groundwater treatment, reference is made, for example, to DE-PS 19 45 605.
  • the water is conducted in a cycle through the soil to be frozen and also gradually cools it to a lower temperature so that subsequent freezing operations can be carried out more quickly.
  • the cooling of the water according to the invention can be carried out both before and during freezing work that is already in progress.
  • the nitrogen off-gas coming from the freezing lances can be used for water cooling. In this way, the sensitive cold content of the nitrogen gas can be optimally used.
  • the method according to the invention can be carried out not only with water standing in the freezer field, but also with strong groundwater movements. If such groundwater movements are present in the freezer area, the groundwater on the side flowing towards the freezer field is removed, cooled and injected again. In this way, higher groundwater velocities can be mastered, especially when freezing with liquid nitrogen.
  • a prerequisite for successful freezing of the ground is that the freezing ground has a sufficient water content, which in the frozen state gives the soil the actual strength. If the water content is too low for icing, the freezing ground is deliberately enriched with water by means of damming and sprinkling technology.
  • frost body 1 In the soil to be frozen is dashed Lines a frost body 1 shown, which fills the profile to be frozen. In the frost body 1 there are a large number of freezing lances 2 which are charged with refrigerant, namely liquid nitrogen. The excavation cross section 3 is not frozen in this case.
  • water is withdrawn from the ground to be frozen by a delivery well 4, cooled in the heat exchanger 6 to a temperature close to 0 ° C. and returned to the ground by swallowing well 5.
  • the water flows are shown by arrows not marked.
  • Liquid nitrogen is used as the coolant, which is removed from the store 7 and fed to the heat exchanger 6.
  • the nitrogen exhaust gas originating from the freezing lances 2 can also be used as a coolant in the heat exchanger 6.
  • Part of the cooled water is not returned to the ground through the swallowing well 5, but through the sprinkler system 8.
  • a barrier well 9 is also shown, through which groundwater is withdrawn, which originates from a groundwater flow in the direction of the soil to be frozen. This groundwater flow is indicated by arrows 10.
  • the groundwater taken through the barrier well 9 can also be cooled and reintroduced into the soil to be frozen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
EP92102488A 1991-03-08 1992-02-14 Procédé pour la congélation accélérée de sol Withdrawn EP0503309A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914107455 DE4107455A1 (de) 1991-03-08 1991-03-08 Verfahren zum beschleunigten gefrieren von erdreich
DE4107455 1991-03-08

Publications (1)

Publication Number Publication Date
EP0503309A1 true EP0503309A1 (fr) 1992-09-16

Family

ID=6426784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102488A Withdrawn EP0503309A1 (fr) 1991-03-08 1992-02-14 Procédé pour la congélation accélérée de sol

Country Status (2)

Country Link
EP (1) EP0503309A1 (fr)
DE (1) DE4107455A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104453910B (zh) * 2013-09-22 2016-08-17 北京中煤矿山工程有限公司 一种斜冻结孔下冻结管装置
CN105857658A (zh) * 2016-05-23 2016-08-17 天津大学 具有调控功能的围堰砂袋吹填分流控制器及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102777185A (zh) * 2012-05-15 2012-11-14 张晓岩 一种斜井井筒施工工艺
CN108331584B (zh) * 2017-12-29 2019-11-15 上海建工集团股份有限公司 一种管幕下土方开挖方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE204162C (fr) *
DE1945605A1 (de) * 1969-02-13 1970-09-03 Yrjoe Reijonen & Veli Reijonen Verfahren und Vorrichtung zur Reinigung von Wasser aus einem Grundwasser-Brunnen
FR2113980A1 (fr) * 1970-11-16 1972-06-30 Union Carbide Canada Ltd

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE204162C (fr) *
DE1945605A1 (de) * 1969-02-13 1970-09-03 Yrjoe Reijonen & Veli Reijonen Verfahren und Vorrichtung zur Reinigung von Wasser aus einem Grundwasser-Brunnen
FR2113980A1 (fr) * 1970-11-16 1972-06-30 Union Carbide Canada Ltd

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104453910B (zh) * 2013-09-22 2016-08-17 北京中煤矿山工程有限公司 一种斜冻结孔下冻结管装置
CN105857658A (zh) * 2016-05-23 2016-08-17 天津大学 具有调控功能的围堰砂袋吹填分流控制器及其使用方法
CN105857658B (zh) * 2016-05-23 2017-12-12 天津大学 具有调控功能的围堰砂袋吹填分流控制器及其使用方法

Also Published As

Publication number Publication date
DE4107455A1 (de) 1992-09-10

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