EP4473345A1 - Vorrichtung und verfahren zur drucksondierung von böden - Google Patents
Vorrichtung und verfahren zur drucksondierung von bödenInfo
- Publication number
- EP4473345A1 EP4473345A1 EP23703437.6A EP23703437A EP4473345A1 EP 4473345 A1 EP4473345 A1 EP 4473345A1 EP 23703437 A EP23703437 A EP 23703437A EP 4473345 A1 EP4473345 A1 EP 4473345A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transport
- seismic
- signal conductor
- pressure
- elements
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/162—Details
- G01V1/166—Arrangements for coupling receivers to the ground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
Definitions
- the invention is in the field of measurement technology and is used with particular advantage in soil probing.
- CPT method cone penetration testing
- the measured values for the indentation forces at the tip of the probe were measured in order to obtain information about the properties of the soil.
- the measured data are sent via a data cable to a measuring station located on the earth's surface, for example in a test vehicle or on a ship. If it is planned to use transport rods to insert the probe to greater depths in the ground, which will be successively connected as the depth of penetration progresses such a data cable is routed through the cavities of the tubular rods or is already threaded through the transport rods at the beginning of the probing process.
- a data cable is routed through the cavities of the tubular rods or is already threaded through the transport rods at the beginning of the probing process.
- transport linkage for example the coiled-rod method and the downhole CPT method.
- seismic investigations can be carried out at different depths with the probe stationary (seismic CPT).
- probe stationary seismic CPT
- impulses are introduced into the ground from the earth's surface or, in the case of offshore applications, from the seabed and the signals arriving at the seismic sensor are measured.
- Document DE 10 2020001 184 A1 discloses a device and a method for carrying out geotechnical investigations, in which other methods for transporting measurement data from a probing device to a data processing device are used.
- the possibility is mentioned there of establishing wireless data transport using a battery-operated transmitter integrated into a probe or, in another variant, of storing measurement data in the probe and reading them out later after the sounding process has ended and the probe has been retrieved.
- the present invention is based on the object of improving and expanding in particular the measurement data acquisition of seismic data and their provision to a data processing device in a cone penetration tester.
- the object is achieved according to the invention with a pressure probing device with the features of claim 1.
- the dependent claims represent advantageous configurations of such a cone penetration test device.
- the invention relates to a method of cone penetration test.
- the invention relates to a pressure probing device with a probe having a probing cone and in particular a skin friction sleeve and further in particular comprising an inclinometer, and with a transport rod adapted to be connected to the probe at a first end thereof and to push it under pressure into a soil area to be probed, and with a seismic measuring device for acquiring seismic signals .
- the object is achieved according to the invention in that the seismic measuring device has a number of seismic sensors which are integrated into a number of elements of the transport rod and are arranged at a distance from one another along the longitudinal direction of the transport rod.
- the transport linkage can have a plurality of rods or tubes which are arranged axially one behind the other and are connected to one another. These each form elements of the transport linkage.
- seismic Measurements are made with sensors placed at different soil depths. These measurements can be carried out for different, several or all seismic sensors at the same time or in quick succession. In this way, a large number of measurement data can be obtained which, individually or collectively, are meaningful for different soil depths. This considerably improves the acquisition of measurement data from seismic data compared to known methods, since the propulsion of the probe or the transport rods does not have to be repeatedly interrupted in order to carry out the seismic measurements.
- the relative position of the seismic sensors to one another along the transport string is known.
- a single depth measurement is sufficient to obtain these statements, by means of which the depth of one of the seismic sensors can be measured below the surface. the can, with the depths of the other sensors resulting from the known relative positions.
- An inclinometer integrated into the probing device can be used to monitor and measure the angle of the feed direction, so that more precise data can be determined with regard to the sensor depth.
- seismic sensors can be distributed over several, in particular at least two or three, elements of the transport linkage. In this way, the sensors can assume greater distances from one another, and the first measurements can also be carried out when not all the elements of the linkage have been inserted into the ground.
- a probing cone is arranged at the tip of the pressure probing device, which considerably facilitates the penetration of the probe and the transport rods into the ground.
- the probing cone is usually equipped with a force measuring device that enables continuous measurement of the indentation forces.
- a skin friction sleeve can also be provided in a known manner behind the probing cone, which allows the skin friction to be measured during the propulsion movement of the probe.
- the seismic sensors are suitable for recording different modes of seismic waves. There may be two or three, four or more than four such seismic sensors, each detecting both P and S seismic waves.
- the pressure probing device can advantageously be designed in that the seismic sensors are arranged at least partially on the lateral surface of one or more elements of the transport rods arranged in a row in the longitudinal direction.
- the elements of the transport linkage can be designed as tubes that have continuous bores in their wall, into which seismic sensors are inserted in such a way that they do not protrude beyond the tube wall in the radial direction.
- the sensors can be arranged slightly behind the enveloping lateral surface of the elements of the transport linkage, and it can advantageously be provided that the surface of the seismic sensors on the outer lateral surface of the element(s) of the transport linkage are covered with a protective layer, in particular made of a plastic , further consists in particular of an epoxy resin. Such a coating can also be provided if the surface of the seismic sensors is flush with the outer surface of the elements of the transport rod assembly.
- the layer should then be designed in such a way that it generates no or only minimal additional frictional resistance when the linkage is advanced.
- the pressure probing device can also be advantageously configured in that each of the seismic sensors is connected to a signal conductor for forwarding measurement signals to a second end of the transport rod assembly opposite the first end on the probe side or the probing tip and/or that each seismic sensor has a device for digitizing and /or modulation of signals for transport over the signal conductor.
- the measurement signals from the seismic sensors are to be routed to the second end of the transport rods, opposite the probing tip, on which a data processing device is provided.
- individual signal conductors can be provided for the individual seismic sensors, but signal conductors from a plurality of seismic sensors can also be used jointly for the forwarding of signals from a plurality of seismic sensors.
- a line can be provided as the signal conductor, which line contains a plurality of individual conductors, one of which carries the signals of a seismic sensor.
- a conductor can also be provided, which provides a voltage supply for the seismic sensors.
- the signal conductor is integrated into an element of the transport linkage and is arranged in particular in a central cavity or in a wall of the element.
- the individual signal conductors can, for example, be inserted into the transport rods, which have not yet been assembled, before the cone penetration test is carried out. be delt and/or already connected to the individual elements of the transport linkage.
- the signal conductors can be placed, for example, in an inner cavity of the tubular elements of the transport linkage or attached to an inner wall of the elements or to the outside of the elements.
- the signal conductor can be composed of signal conductor sections that are detachably connected to one another at the ends of the elements of the transport rod, the signal conductor sections ending in particular at plug-in connection elements that are connected to one end of an element of the transport rod.
- the plug-in connection elements can be multi-pole in order to establish a connection for each seismic sensor and the signal conductor assigned to it.
- the signal conductor sections can generally be connected to one another, for example by means of plug or screw connections or also by bayonet locks.
- a single signal conductor subdivided in the longitudinal direction can also be used, to which one or more seismic sensors are connected in each case.
- each of the seismic sensors can also be assigned its own signal conductor.
- several signal conductors can also run parallel to one another through the transport linkage. Provision can advantageously be made for the signal conductor sections to be formed by one or more electrically insulated electrical conductors and/or by optical fibers. Accordingly, the individual signal conductor sections can be plugged together, for example, in the context of plug connections or also soldered, glued or welded in an electrically conductive manner. Screw connections are also advantageously conceivable. If the signal conductor is an optical fiber, connections that can easily be produced are also known for optical fibers.
- the seismic sensors can already be installed and connected to a signal conductor.
- a seismic sensor can be identified by its associated conductor pole.
- each sensor can be assigned an identification code for transmission.
- the measurement signals can be transmitted, for example, in the form of voltage signals via the signal conductor or conductors, with the data being transmitted, for example, by voltage levels, but also by AC voltage signals and coded by frequencies or in digitized form.
- each of the seismic sensors, but also the probe or the probing cone and the skin friction sleeve as well as the pore pressure measuring device can have analog/digital converters in order to digitize the measurement data.
- the data from the individual seismic sensors are encoded and transmitted digitally or transmitted one after the other using a time-division multiplex method, only a few signal conductors, in extreme cases only a single signal conductor, can be provided along the transport linkage for data transport.
- a coding of the signals ensures that each individual signal can be assigned to a sensor and thus also to a measurement location.
- the signal conductor sections are formed by the elements of the transport linkage.
- electrical signals for example in the form of digital voltage signals, can be transmitted through the elements of the transport linkage.
- the invention relates not only to a cone-type probing device of the type described above, but also to a method for probing using such a cone-type probing device, the signal conductor being composed of signal conductor sections and elements of the transport rods being successively joined together with increasing penetration depth of the probe, and in each case also signal conductor sections being connected to one another get connected.
- the invention relates to a method for using a pressure probing device of the type described above, in which, after the introduction of at least part of the transport rod, the penetrating movement of the probe is interrupted and one or more seismic measurements are taken using several seismic measurements spaced apart from one another in the longitudinal direction of the transport rod pressure sensors is/are carried out.
- FIG. 1 shows a probe with an element of a transport linkage, schematically in longitudinal section
- Fig. 4 two elements of the transport linkage before assembly
- Fig. 5 an element of the transport linkage with a seismic sensor
- FIG. 6 shows an offshore application as an application example.
- FIG. 1 shows, in a partially longitudinal section, a probe with a probing cone 1, a skin friction sleeve 2 and a filter element 3 for measuring the pore pressure, which together form a probe which is pressed into a soil to be examined.
- the probe is connected to a first element 4 of a transport linkage, which is designed as a tube.
- the seismic sensors/geophones 9, 10, 11 are arranged in the wall of the pipe in such a way that they are fastened in through openings in the pipe wall.
- 13 denotes an insulating layer which covers and embeds the seismic sensors.
- a signal conductor 15 is arranged inside the cavity 19 of the element 4 of the transport linkage.
- the signal conductor 15 is divided in the longitudinal direction according to the lengths of the elements 4 of the transport linkage, and the individual signal conductor sections are connected to one another by means of detachable connections, as will be explained in more detail below.
- a screw thread 22 is shown in FIG. 1, which is used to join the signal conductor sections designed as coaxial conductors.
- Figure 2 shows schematically a probe 1, 2 and a transport linkage consisting of two elements 4, 5 with a first end 7, which is connected to the probe 1, 2, and a second end 8, opposite the probing tip, which is used during the measuring process of the earth's surface or ground surface is close, in particular protrudes from the top of the ground.
- a signal conductor 15 runs in the longitudinal direction, which is joined by means of connector elements 20, 21 in each case at the transition between two elements 4, 5 of the transport linkage.
- the signal conductor 15 can be designed, for example, as a single insulated electrical conductor, as a bundle of conductors or as an optical fiber.
- a configuration as a waveguide, for example in the form of a coaxial cable, is also conceivable.
- Various seismic sensors 9, 10, 11 are connected to the signal conductor 15 and are distributed over various elements 4, 5 of the transport linkage along the longitudinal direction of the transport linkage.
- One or more seismic sensors 9, 10, 11 can be provided in a single element 4, 5.
- the signal conductor can be formed by a signal bus, which can be single-pole or multi-pole and which can contain a power supply that is used to operate communication modules of the individual seismic sensors, for example in the form of analog/digital converters, encoders or frequency converters .
- FIG. 3 shows two examples of the integration of seismic sensors into the wall of an element 6 of the transport rods.
- a seismic sensor 10 is arranged in a continuous opening in the wall of the tubular element 6 in such a way that its surface is retracted behind the lateral surface of the tube. The resulting cavity is filled with a cover layer 13, for example made of an epoxy resin, so that the sensor 10 is protected against environmental influences.
- a second seismic sensor 11 is arranged in an opening of the element 6 in such a way that it is flush with the peripheral surface of the element 6 .
- a cover layer 14 for example made of an epoxy resin, is additionally provided, which covers both the seismic sensor 11 and adjacent parts of the tubular element 6 .
- the layer 14 should be sized so that it does not impede penetration of the transport rod into the ground, but be thick and strong enough to protect the seismic pressure sensors.
- the two sensors 10, 11 are each connected to the signal conductor 15 in the cavity 19 of the element 6.
- Figure 4 shows an embodiment in which a signal conductor consists of two or more signal conductor sections 16, 17 which are firmly connected to the wall of the elements 4, 5 of the transport linkage and arranged, for example, in a groove on the inside of the pipe wall of the elements 4, 5 or fixed to the inside of the wall of the elements 4, 5 by gluing.
- the signal conductor sections 16, 17 each end in connector elements 20, 21, which are also firmly connected to the elements 4, 5 of the transport linkage at the other ends, so that when the elements 4, 5 of the transport linkage are connected to one another, the connector elements 20, 21 also reliably connect can be put together.
- a signal conductor can also be maintained in the center of the cavity of the elements of the transport linkage, for example by spacers to the zy- cylindrical inner wall. This prevents damage to the signal conductor when connecting two adjacent elements of the transport linkage.
- FIG. 5 shows an embodiment of the invention in which a seismic pressure sensor 12 is arranged in an electrically insulated manner in the wall of the element 5 of the transport linkage.
- An electrical insulation layer 23 is provided, which both electrically insulates the sensor 12 from the metal tube of the element 5 and provides mechanical protection on the outer surface of the element of the transport rods.
- the sensor 12 also has a converter 18 which converts the measurement signals into digital signals and which, by means of a supply line 24, transmits the electrical signals thus formed into the element 5 of the transport linkage, more precisely into the wall of the element 5.
- the elements 4, 5, 6 of the transport linkage can thus function as a signal conductor after assembly. If, for example, the measurement signals are converted into a high-frequency digital signal, these signals can be transported via the transport rods without interference. Using a time-division multiplex solution, the signals from different seismic sensors can also be transmitted separately from one another.
- FIG. 6 shows an offshore application of a probe with a multi-part transport rod system, a transmitter 28, 29 for seismic impulses being able to be provided on a ship 26 and/or on a foundation 27 on the seabed.
- the transport linkage 30 is shown enlarged in the right part of the figure. It comprises a probing cone and elements 30, 31, 32 of the transport linkage, it being possible for one or more sensors 9a, 10a, 11a to be provided in each of several elements 31, 32 of the transport linkage.
- the sensors are arranged inside the elements of the transport linkage and can be arranged and fastened on the inside of the lateral surface of the elements, but also, as can be seen from the cross-sectional view for sensor 11a, further radially inward, for example also in the center on the central axis of the transport linkage, the sensors then, for example, via holding elements, in particular Webs or sockets 25 can be attached to the inner lateral surface of the elements of the transport linkage.
- the attachment can be designed in such a way that a suitable acoustic coupling takes place.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Geophysics (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022201173.2A DE102022201173A1 (de) | 2022-02-03 | 2022-02-03 | Vorrichtung und Verfahren zur Drucksondierung von Böden |
| PCT/EP2023/052696 WO2023148336A1 (de) | 2022-02-03 | 2023-02-03 | Vorrichtung und verfahren zur drucksondierung von böden |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4473345A1 true EP4473345A1 (de) | 2024-12-11 |
Family
ID=85174128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23703437.6A Pending EP4473345A1 (de) | 2022-02-03 | 2023-02-03 | Vorrichtung und verfahren zur drucksondierung von böden |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20250137987A1 (de) |
| EP (1) | EP4473345A1 (de) |
| JP (1) | JP2025508666A (de) |
| KR (1) | KR20250002138A (de) |
| AU (1) | AU2023215649A1 (de) |
| CA (1) | CA3249456A1 (de) |
| DE (1) | DE102022201173A1 (de) |
| WO (1) | WO2023148336A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH488198A (de) | 1969-03-14 | 1970-03-31 | H Kistler Rudolf | Sonde für Bodenuntersuchungszwecke |
| NL8203399A (nl) | 1982-08-31 | 1984-03-16 | Ijsselmeer Beton Fundatietechn | Transmissiestelsel voor bodemonderzoek. |
| DE19852455C2 (de) | 1998-11-13 | 2003-12-24 | Geoforschungszentrum Potsdam | Verankerungseinrichtung mit seismischem Sensor |
| NL1012468C2 (nl) * | 1999-06-29 | 2001-01-02 | Ver Bedrijven Van Den Berg Hee | Bodemsondeerinrichting met optische gegevenstransmissie. |
| US7201060B2 (en) * | 2000-07-18 | 2007-04-10 | Georgia Tech Research Corp. | Apparatus and method for determining in situ pore fluid and soil properties using multi-sensor measurement systems |
| EP1235082A1 (de) | 2001-02-22 | 2002-08-28 | Universiteit Gent | Verfahren und Vorrichtung zum Induzieren akustischer Scherwellen und zur Messung seismischer Parameter in durchdringbaren Medien |
| JP3820364B2 (ja) | 2001-11-12 | 2006-09-13 | 鹿島建設株式会社 | 貫入試験用貫入センサ |
| DE102006009246B3 (de) | 2006-02-28 | 2007-08-02 | GeoForschungsZentrum Potsdam Stiftung des öffentlichen Rechts | Verfahren und Vorrichtung zur Vorauserkundung beim Tunnelbau |
| WO2019106635A1 (en) | 2017-12-01 | 2019-06-06 | Pagani Geotechnical Equipment S.R.L. | Improved seismic module |
| DE102020001184B4 (de) | 2020-02-24 | 2026-01-29 | Universität Bremen | Vorrichtung zur Drucksondierung |
-
2022
- 2022-02-03 DE DE102022201173.2A patent/DE102022201173A1/de active Pending
-
2023
- 2023-02-03 JP JP2024544542A patent/JP2025508666A/ja active Pending
- 2023-02-03 US US18/835,113 patent/US20250137987A1/en active Pending
- 2023-02-03 KR KR1020247029458A patent/KR20250002138A/ko active Pending
- 2023-02-03 CA CA3249456A patent/CA3249456A1/en active Pending
- 2023-02-03 WO PCT/EP2023/052696 patent/WO2023148336A1/de not_active Ceased
- 2023-02-03 EP EP23703437.6A patent/EP4473345A1/de active Pending
- 2023-02-03 AU AU2023215649A patent/AU2023215649A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20250002138A (ko) | 2025-01-07 |
| AU2023215649A1 (en) | 2024-08-01 |
| WO2023148336A1 (de) | 2023-08-10 |
| JP2025508666A (ja) | 2025-04-10 |
| US20250137987A1 (en) | 2025-05-01 |
| DE102022201173A1 (de) | 2023-08-03 |
| CA3249456A1 (en) | 2025-01-17 |
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