DE867676C - Process for carrying out the freezing process in soil layers with a high flow velocity of the groundwater - Google Patents
Process for carrying out the freezing process in soil layers with a high flow velocity of the groundwaterInfo
- Publication number
- DE867676C DE867676C DEE4744A DEE0004744A DE867676C DE 867676 C DE867676 C DE 867676C DE E4744 A DEE4744 A DE E4744A DE E0004744 A DEE0004744 A DE E0004744A DE 867676 C DE867676 C DE 867676C
- Authority
- DE
- Germany
- Prior art keywords
- groundwater
- flow velocity
- freezing process
- frozen
- carrying
- 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
Links
- 238000000034 method Methods 0.000 title claims description 18
- 238000007710 freezing Methods 0.000 title claims description 15
- 230000008014 freezing Effects 0.000 title claims description 15
- 239000003673 groundwater Substances 0.000 title claims description 15
- 239000002689 soil Substances 0.000 title claims description 11
- 239000000463 material Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
Verfahren zur Durchführung des Gefrierverfahrens in Bodenschichten mit großer Strömungsgeschwindigkeit des Grundwassers Gegenstand :der Erfindung ist :ein Verfahren zur Durchführung ides Gefrierverfahrens in Bodenschichten mit großer Strömungsgeschwindigkeit des Grundwassers.Process for carrying out the freezing process in layers of soil with high flow velocity of the groundwater subject: the invention is : a process for carrying out the freezing process in layers of soil with large Groundwater flow velocity.
Es ist bekannt, daß für Zwecke der Absperrung des Grundwassers beim Abteufen von Schächten und Baugruben in wasserführenden, losen Gebirgsarten wie Sand und Kies mit dem Gefrierverfahren Frostkörper und Frostmauern hergestellt werden, welche den Wasserzutritt verhindern und in deren Schutze die Abteufarbeiten durchgeführt -werden. Die Herstellung derartiger Frostkörper bzw. Frostmauern ist nach dem heutigen Stand der Gefriertechnik nur in stehendem oder nur sehr langsam fließendem Grundwasser möglich, in groben Sanden und Kiesen mit großer Strömungsgeschwindigkeit des Grundwassers ist das Gefrieren nicht durchführbar.It is known that for purposes of shutting off the groundwater when Sinking of shafts and excavations in water-bearing, loose mountain types such as Sand and gravel are produced using the freezing process, frost bodies and frost walls, which prevent the entry of water and under whose protection the sinking work is carried out -will. The production of such frost bodies or frost walls is according to today's State of the art of freezing technology only in standing or very slowly flowing groundwater possible in coarse sand and gravel with high groundwater flow speeds freezing is not feasible.
Die Erfindung bezweckt, Frostkörper und Frostmauern mit dem üblichen Gefrierverfahren auch in Bodenarten mit großer Strömungsgeschwindigkeit des Grundwassers herzustellen und zu beschleunigen, -derart, daß in dem zu gefrierenden Raum an Stelle der natürlich abgelagerten Bodenschichten ein homogenes Fremdmaterial eingebracht wird, in welchem (die Grundwasserströmungs:geschwindigkeit infolge seines geringen Durchlässigkeitswertes so weit herabgemindert ist, daß der Gefriervorgang erfolgen kann. Die Strömungsgeschwindigkeit des Grundwassers in einem wasserdurchlässigen Bodenmaterial ist bekanntlich von dessen Durchlässigkeitswert und von dem Druckgefälle abhängig. Kiese und Grobsande haben hohe Durchlässigkeitswerte, weshalb in innen bei einem vorhandenen Druckgefälle die Strömungsgeschwindigkeit vorhandenen Grundwassers derart groß ist, daß die ständige Wärmezuführung durch das Wasser die Zufuhr von Kälte durch die Kältelaugenleitungen der Gefrierbohrlöcher überwiegt und das Gefrieren verhindert.The invention aims to provide frost bodies and frost walls with the usual Freezing processes also in soil types with high groundwater flow velocities to produce and accelerate, -so that in the room to be frozen in place The naturally deposited soil layers introduced a homogeneous foreign material becomes, in which (the groundwater flow velocity due to its low Permeability value is reduced so far that the freezing process take place can. The flow rate of groundwater in a water-permeable Soil material is known to have a permeability value and a pressure gradient addicted. Gravel and coarse sands have high permeability values, which is why inside with one existing pressure gradient the flow rate of existing groundwater in such a way What is great is that the constant supply of heat through the water increases the supply of cold through the cold liquor lines of the freeze wells predominates and the freezing prevented.
Wenn man jedoch aus dem zu gefrierenden Raum ein solches durchlässiges natürliches Material entfernt und .durch ein homogenes Fremdmaterial ersetzt, welches wasserundurchlässig ist oder nur einen geringen Durchlässigkeitswert besitzt und dementsprechend eine kleine Korngröße hat, wird in dem zu gefrierenden Raum die Strömungsgeschwindigkeit des Grundwassers aufgehoben oder so weit herabgemindert, .daß .die Kältezufuhr durch die Gefriereinrichtung die Wärmezufuhr idurch das strömende Grundwasser überwiegt und eine fortschreitende Abkühlung und das Gefrieren innerhalb des im Austausch eingebrachten Fremdmaterials bewirkt.However, if you get such a permeable space from the room to be frozen natural material removed and replaced by a homogeneous foreign material, which is impermeable to water or has only a low permeability value and accordingly has a small grain size, the Groundwater flow velocity is abolished or reduced so much, .that .the supply of cold through the freezer, the supply of heat through the flowing Groundwater predominates and a progressive cooling and freezing within of the foreign material brought in in exchange.
Der Austausch des natürlichen Bodenmaterials .durch ein geeignetes Fremdmaterial geschieht durch Bohrungen innerhalb des zu gefrierenden Raumes. Es werden Bohrungen mit großem Bohrdurchmesser, mit Verrohrung über die Grundfläche des zu gefrierenden Raumes aneinandergereiht, bis zur wassertragenden Bodenschicht niedergebracht. Jedes Bohrloch, abgesehen von den zwei ersten, stützt sich mit seiner niedergehenden Verrohrung an zwei bereits bestehende, verrohrte Bohrungen, so daß durch eine derartige Führung einAbweichen der Bohrlöcher voneinander verhindert wird und 'die Bohrungen gegenseitig aneinander anschließen. Die Bohrlöcher werden bei gleichzeitigem Ziehen der Bohrröhre fortschreitend mit dem Austauschmaterial verfüllt. Der Gefriervorgang ist weiter abhängig von dem Wärmeleitvermögen des Bodenmaterials. Durch das beschriebene Verfahren ist @es möglich, in den zu gefrierenden Raum ein Austauschmaterial mit geeignetem Wärmeieitvermögen einzubringen und den Gefriervorgang dadurch zu beschleunigen.The replacement of the natural soil material with a suitable one Foreign material occurs through bores within the space to be frozen. It drill holes with a large drilling diameter, with tubing over the base area of the room to be frozen lined up up to the water-bearing soil layer brought down. Every borehole, apart from the first two, is supported by its own descending piping to two pre-existing, cased bores, so that such a guide prevents the drilled holes from deviating from one another will and 'connect the holes to each other. The drill holes will be while pulling the drill pipe progressively with the replacement material backfilled. The freezing process also depends on the thermal conductivity of the floor material. Using the method described, it is possible to enter the room to be frozen Bring replacement material with suitable heat conductivity and the freezing process thereby accelerating.
Das gewerbliche Anwendungsgebiet der Erfindung liegt bei der Herstellung von Dichtungsschürzen zum Sperren des Grundwassers beim Bau von Dämmen, Talsperren, Stauwerken und Schächten.The industrial application of the invention is manufacturing of sealing aprons for blocking the groundwater when building dams, dams, Dams and shafts.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE4744A DE867676C (en) | 1951-12-09 | 1951-12-09 | Process for carrying out the freezing process in soil layers with a high flow velocity of the groundwater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE4744A DE867676C (en) | 1951-12-09 | 1951-12-09 | Process for carrying out the freezing process in soil layers with a high flow velocity of the groundwater |
Publications (1)
Publication Number | Publication Date |
---|---|
DE867676C true DE867676C (en) | 1953-02-19 |
Family
ID=7066401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEE4744A Expired DE867676C (en) | 1951-12-09 | 1951-12-09 | Process for carrying out the freezing process in soil layers with a high flow velocity of the groundwater |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE867676C (en) |
-
1951
- 1951-12-09 DE DEE4744A patent/DE867676C/en not_active Expired
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