METHOD AND SYSTEM FOR DETERMINING A SOIL CLASS AND USE DURING DETERMINATION OF A SOIL CLASS

Abstract

The invention relates to methods for determining a soil class, in which an earth borehole is introduced into the ground by means of a ground drilling device with a drill head, wherein a parameter of the ground drilling device and/or an operational parameter of the ground drilling device is assessed during the determination of which soil class is involved.

Claims

1. A method for determining a soil class in which an earth borehole is being made in the soil by means of a ground drilling device with a drilling head, wherein at least one of: a) a parameter of the ground drilling device; and b) an operating parameter of the ground drilling device; is evaluated to determine which soil class is present.

2. The method according to claim 1, wherein the parameter of the ground drilling device is chosen to be the type of the drilling head and/or the power of the ground drilling device.

3. The method according to claim 1, wherein the operating parameter of the ground drilling device is chosen to be one of the torque, the tensile/compressive force, the speed of advancement, the mud-flush rate and the rotational speed.

4. The method according to claim 1, wherein a signal of a sensor on the drilling head is also used in the determination of the soil class.

5. The method according to claim 1, wherein the location of the drilling head is determined and a correlation between the soil class determined and the location is produced.

6. The method according to claim 1, wherein a database is created to provide a correlation between location and soil class.

7. A system for determining a soil class, comprising a ground drilling device having a drilling head, wherein the system uses at least one parameter and/or at least one operating parameter of the ground drilling device to determine the soil class.

8. The system according to claim 7, wherein a sensor is arranged on the drilling head and the signal of the sensor is used to determine the soil class.

9. The system according to claim 7, further comprising a locating unit with which the location of the drilling head is determinable, wherein the locating unit links up a data point correlated with the location of the drilling head to the soil class determined.

10. (canceled)

Description

[0012] In one preferred embodiment, the parameter of the ground drilling device is chosen to be the type of the drilling head and/or the power of the ground drilling device. In this way, the first parameter may be considered in the form of the material used for producing the earth borehole, in particular the kind of drilling tool, which comes down to the type of drilling head. The type of drilling head may be a soft, medium, hard drill head, roller bit, fishtail bit, diamond bit, PDC bit, hybrid bit, eccentric roller bit, big hole roller bit, wing bit or percussion drill bit. By taking into account the type of drilling tool, especially the type of drilling head, one can generate complex information making possible the classification of the soil. For example, in easily soluble rock it is possible to introduce into the soil a drilling head which is overdimensioned for this, unlike a drilling head specially adapted for easily soluble rock.

[0013] In one preferred embodiment, the operating parameter of the ground drilling device is chosen to be the torque, the tensile/compressive force, the speed of advancement, the mud-flush rate and/or the rotational speed. In this way, a classification or determination of the soil class can be done from the current drilling data, such as the settings chosen on the ground drilling device in order to produce the current earth borehole. A complex consideration of some or all of the operating parameters together with the parameters of the ground drilling device is possible.

[0014] In one preferred embodiment, a signal of a sensor on the drilling head is also used, wherein the signal in particular can be correlated with a pressure in the earth borehole and/or a soil quality. In this way, the pressure in the earth borehole and/or the soil quality can also be taken into account. All types of pressure sensors as absolute or differential pressure sensors with different physical principles are possible. Examples of these are piezo-resistive, piezoelectrical, capacitive and inductive pressure sensors as well as pressure sensors with a Hall element, etc. Examples of sensors for the soil quality which can be mentioned are: seismic sensors, sound pressure sensors for measurement of ground-dependent structure-borne sound, scratch sensors or acoustical geo-scanners.

[0015] In one preferred embodiment, the location of the drilling head is determined and a correlation between the soil class determined and the location is produced. In this way, a geographical correlation of the soil class can be produced, with which recommendations for the construction machinery can be made at a later time.

[0016] In one preferred embodiment, a database is created to provide a correlation between location and soil class, so that in the supplement of a construction site database can be queried appropriate measures selected. A correlation with commercially available or free map material (such as Google Earth) is possible.

[0017] The invention also creates a system for determining a soil class, wherein the system comprises a ground drilling device having a drilling head. The system uses parameters and/or operating parameters of the ground drilling device to determine the soil class of the soil. Remarks regarding the method for determining a soil class in the specification and the claims as well as the FIGURE apply accordingly to the system.

[0018] The system may comprise in particular a programmed control system or logic-based control system working off commands, with which the parameters and/or operating parameters of the ground drilling device can be detected in order to determine the soil class of the soil. For example, it is possible for the user to enter the type of drilling tool, or for the drilling head to be recognized by the system, for example by means of a sensor. The operating parameters of the ground drilling device in the form of the machine data, such as torque, tensile/compressive force, speed of advancement, mud-flush rate and/or rotational speed can be read out from the ground drilling device when creating the earth borehole. A database may contain the different operating parameters of the ground drilling device and/or the parameters of the ground drilling device and assign a soil class to a combination present in the database. A tuple comprising the operating parameters of the ground drilling device and/or the parameters of the ground drilling device may be assigned to a soil class. The evaluated or determined soil class may in a preferred embodiment exert influence on the machine control of the ground drilling device, for example in order to optimize the process of creating the earth borehole. It is also possible to use a fuzzy logic to determine the soil class from the operating parameters of the ground drilling device and/or the parameters of the ground drilling device.

[0019] In one preferred embodiment, a sensor is arranged on the drilling head and the signal of the sensor is used to determine the soil class. The sensor may be designed to determine the pressure in the earth borehole. The sensor arranged on the drilling head may also be a sensor for detecting the soil quality.

[0020] In one preferred embodiment, the system comprises a locating unit with which the location of the drilling head is determinable, wherein the unit links up a data point correlated with the location of the drilling head to the soil class determined.

[0021] The invention also creates a use during the determining of a soil class, wherein an earth borehole is produced in the soil, and at least one parameter and/or at least one operating parameter of the ground drilling device is used to determine the soil class. Remarks regarding the method and system for determining a soil class apply analogously to the use.

[0022] The preceding remarks, just as the following description of exemplary embodiments, do not constitute any abandonment of particular embodiments or features.

[0023] The invention shall now be explained more closely with the aid of exemplary embodiments presented in the drawing.

[0024] The single FIGURE shows in a schematic, partly sectioned representation, a ground drilling device 1 with a drill string 2 and a drilling head 3 fastened at the front end to the drill string 2. By means of the ground drilling device 1, an earth borehole 4 is produced in the soil. A program 5, which runs in the hardware of the ground drilling device 1, detects the parameters of the ground drilling device 1 and the operating parameters of the ground drilling device 1. The program 5 can carry out a classification of the soil as Ground Class six for example, if a high torque, a high compressive force, and a small rate of advancement have been established for the operating parameters of the ground drilling device 1 and a roller bit is used for the parameter of the ground drilling device 1.