DE529361C - Procedure for determining the load-bearing capacity and stability of the subsoil - Google Patents

Procedure for determining the load-bearing capacity and stability of the subsoil

Info

Publication number
DE529361C
DE529361C DEK117969D DEK0117969D DE529361C DE 529361 C DE529361 C DE 529361C DE K117969 D DEK117969 D DE K117969D DE K0117969 D DEK0117969 D DE K0117969D DE 529361 C DE529361 C DE 529361C
Authority
DE
Germany
Prior art keywords
borehole
subsoil
load
wall
determining
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
DEK117969D
Other languages
German (de)
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.)
FRANZ KOEGLER DR ING
Original Assignee
FRANZ KOEGLER DR ING
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 FRANZ KOEGLER DR ING filed Critical FRANZ KOEGLER DR ING
Priority to DEK117969D priority Critical patent/DE529361C/en
Application granted granted Critical
Publication of DE529361C publication Critical patent/DE529361C/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00—Investigation of foundation soil in situ
    • E02D1/02—Investigation of foundation soil in situ before construction work
    • E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Soil Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Geophysics And Detection Of Objects (AREA)

Description

Verfahren zur Ermittlung der Tragfähigkeit und Lagerungsfestigkeit des Baugrundes Das übliche Verfahren der Probebelastung des Baugrundes setzt an der Oberfläche der Bausohle oder in der Tiefe eines Schürfschachtes oder Bohrloches eine Platte auf, belastet diese durch lotrechte Lastep und mißt ihre Einsenkung. Der dem Einsinken entgegenwirkende Widerstand des Baugrundes setzt sich dabei zusammen aus dem Widerstand aller Schichten, die unter der Probeplatte liegen und die je nach ihrer Tiefe sehr verschieden belastet werden und außerdem je nach ihrer Lagerungsfestigkeit einen sehr verschiedenen Beitrag zu der Gesamteinsenkung stellen. Die Probebelastung nach dem eben geschilderten Verfahren ergibt daher immer nur ein Integralergebnis aus dem Verhalten aller nach der Tiefe folgenden Schichten. Wie die einzelne Schicht dabei mitwirkt, welcher Anteil der Einsenkung z. B. von irgendeiner schlechten Schicht in der Tiefe herrührt, kann danach nicht ermittelt werden. Man hat hiernach keine Möglichkeit, die Gefährlichkeit solcher wenig tragfähigen Schichten in der Tiefe für das zu erstellende Bauwerk zu beurteilen.Procedure for determining the load-bearing capacity and storage stability of the subsoil The usual procedure of test loading of the subsoil begins the surface of the construction base or in the depth of a mining shaft or borehole up a plate, loads it with perpendicular loads and measures its subsidence. The resistance of the subsoil, which counteracts subsidence, is made up of this from the resistance of all layers which lie under the test plate and which ever are loaded very differently according to their depth and also depending on their storage stability make a very different contribution to the overall subsidence. The test load using the method just described therefore only ever gives one integral result from the behavior of all layers following the depth. Like the single layer contributes to what proportion of the depression z. B. from some bad layer originates in the depth cannot be determined afterwards. You don't have any according to this Possibility of the danger of such poorly stable layers in the depth for the building to be constructed.

Die Erfindung geht darauf aus, es zu ermöglichen, jede einzelne Schicht des Baugrundes gesondert auf ihre Lagerungsfestigkeit zu untersuchen, und, da dieses bei größeren Tiefen und vor Beginn des Baues im allgemeinen nur vön einem Bohrloche aus-geschehen kann, diese Prüfung in einem ge-,v öhnlichen Bohrloche vorzunehmen.The aim of the invention is to enable each individual layer of the subsoil to be examined separately for their storage stability, and, since this at greater depths and before the start of construction, generally only one borehole can happen to carry out this test in a usual borehole.

Zu diesem Zwecke wird nicht mit der üblichen lotrechten Belastung gearbeitet, sondern eine seitliche Pressung auf die Wand des Bohrloches ausgeübt, dabei die Nachgiebigkeit jeder einzelnen Schicht gemessen und damit eine Zahl für ihre Tragfähigkeit gewonnen.For this purpose, the usual perpendicular load is not applied worked, but a lateral pressure exerted on the wall of the borehole, the flexibility of each individual layer was measured and thus a number for gained their viability.

In vorteilhafter Weise verwendet man hierzu halbkugelige oder halbzylindrische Druckkörper, die in beliebiger Weise gegen die Bohrlochseitenwand unter meßbarem Druck gepreßt werden, oder einen Vollzylinder, der längs der Mantellinien in einzelne Streifen zerlegt ist, die in radialer Richtung gegen die Bohrlochwandung gepreßt werden.It is advantageous to use hemispherical or semicylindrical ones for this purpose Pressure hull, which in any way against the borehole sidewall under measurable Pressure are pressed, or a solid cylinder, which along the surface lines in individual Strip is disassembled, which is pressed in the radial direction against the borehole wall will.

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zur Ermittlung der Tragfähigkeit und Lagerungsfestigkeit des Baugrundes, dadurch gekennzeichnet, daß von einem Bohrloche aus die einzelnen Schichten des Baugrundes dadurch . auf Nachgiebigkeit untersucht werden, daß auf die zylindrische Wand des Bohrloches ein radialer Druck ausgeübt wird. PATENT CLAIMS: i. Method for determining the load-bearing capacity and storage stability of the subsoil, characterized in that the individual layers of the subsoil through a borehole. be examined for compliance that a radial pressure is exerted on the cylindrical wall of the borehole. 2. Einrichtung zur Ausführung des Verfahrens nach Anspruch i, die, bis zu beliebiger Tiefe in das Bohrloch versenkt, durch Antrieb von oben her einen Druck auf die Seitenwand des Bohrloches ausübt, dadurch gekennzeichnet, daB die den meßbaren Druck auf - die Bohrlochwand ausübenden. Kö- pr halbkugelige oder halbzylindrische Gestalt haben. 2. Device for performing the method according to claim i, the, up to Any depth sunk into the borehole, a pressure from above by driving on the side wall of the borehole, characterized in that the measurable Apply pressure to the wall of the borehole. Body hemispherical or semicylindrical Have shape. 3. Einrichtung nach Anspruch a, dadurch gekennzeichnet, daB die Wand eines Vollzylinders in einzelne Streifen längs der Mantellinien zerlegt ist, die durch Druck allseitig in radialer Richtung gegen die Wand des Bohrloches gepreBt werden.3. Device according to claim a, characterized in that the wall of a solid cylinder is divided into individual strips along the surface lines, which pressed by pressure on all sides in the radial direction against the wall of the borehole will.
DEK117969D 1929-12-14 1929-12-14 Procedure for determining the load-bearing capacity and stability of the subsoil Expired DE529361C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK117969D DE529361C (en) 1929-12-14 1929-12-14 Procedure for determining the load-bearing capacity and stability of the subsoil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK117969D DE529361C (en) 1929-12-14 1929-12-14 Procedure for determining the load-bearing capacity and stability of the subsoil

Publications (1)

Publication Number Publication Date
DE529361C true DE529361C (en) 1931-07-11

Family

ID=7243958

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK117969D Expired DE529361C (en) 1929-12-14 1929-12-14 Procedure for determining the load-bearing capacity and stability of the subsoil

Country Status (1)

Country Link
DE (1) DE529361C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349610A (en) * 1962-12-28 1967-10-31 Ct Ex De Rech S Et D Etudes Du Soil deformation measuring cell with positioning liner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349610A (en) * 1962-12-28 1967-10-31 Ct Ex De Rech S Et D Etudes Du Soil deformation measuring cell with positioning liner

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