METHOD AND ARRANGEMENT FOR MONITORING A STRUCTURAL FOUNDATION

Abstract

The invention relates to a method and an arrangement for monitoring a structural foundation in a ground for a structure, wherein ground parameters are determined for the ground, based on the determined ground parameters a preliminary ground model is calculated by means of a computer unit, on which a design of the structural foundation is laid out taking into consideration specification data of the structure to be erected, during and/or after the production of the structural foundation measured values relating to settlements, distortions and/or forces on the structural foundation or the structure are recorded by means of measuring means, the measured values are forwarded to the computer unit which checks if the measured values are consistent with the preliminary ground model, and if the measured values are not consistent with the preliminary ground model, a subsequent ground model, in which the measured values are consistent with the new ground model, is calculated by the computer unit.

Claims

1.-11. (canceled)

12. A method for monitoring a structural foundation in a ground for a structure, wherein ground parameters are determined for the ground, based on the determined ground parameters a preliminary ground model is calculated by means of a computer unit, on which a design of the structural foundation is laid out taking into consideration specification data of the structure to be erected, during and/or after the production of the structural foundation measured values relating to settlements, distortions and/or forces on the structural foundation or the structure are recorded by means of measuring means, the measured values are forwarded to the computer unit which checks if the measured values are consistent with the preliminary ground model, and if the measured values are not consistent with the preliminary ground model, a subsequent ground model, in which the measured values are consistent with the new ground model, is calculated by the computer unit, wherein the preliminary ground model is compared with the subsequent ground model as to what extent specification data of the foundation are met, and wherein a warning is issued by the computer unit if specification data for the structural foundation are no longer met in the subsequent ground model.

13. The method according to claim 12, wherein the specification data comprise a load-bearing capacity and/or lifespan of the structural foundation or the structure.

14. The method according to claim 12, wherein the ground parameters are determined through ground analyses, in particular test drillings.

15. The method according to claim 12, wherein the ground parameters comprise type, composition and size of ground layers as well as a load-bearing capacity of the ground.

16. The method according to claim 12, wherein as measuring means sensors, in particular strain gauges and/or load cells, are mounted on or in the structural foundation and/or the structure.

17. The method according to claim 12, wherein the measuring means are wirelessly connected to the computer unit.

18. The method according to claim 12, wherein the method is carried out repeatedly, in particular at regular intervals.

19. The method according to claim 12, wherein when recording the measured values, while still producing the structural foundation, the subsequent ground model is taken into consideration for the design of the structural foundation in subsequent construction stages.

20. An arrangement for monitoring a structural foundation in a ground for a structure, for carrying out the method according to claim 12, having a computer unit, by which, based on determined ground parameters, a preliminary ground model can be ascertained, on the basis of which a design of the structural foundation takes place in consideration of specification data, and measuring means on the structural foundation or a structure, wherein settlements, distortions and/or forces on the structural foundation or the structure can be recorded by the measuring means, wherein the computer unit has a data connection to the measuring means for the transmission of measured data and by the computer unit a check can be made as to whether the measured values are consistent with the first ground model, wherein by the computer unit a subsequent ground model can be calculated, in which the measured values are consistent with the subsequent ground model, if the measured values are not consistent with the preliminary ground model, wherein by means of the computer unit the preliminary ground model is compared with the subsequent ground model as to what extent specification data of the foundation are met, and wherein a warning can be issued by the computer unit if specification data for the structural foundation are no longer met in the subsequent ground model.

Description

[0026] The invention is explained further hereinafter by way of sequence diagrams of preferred embodiments. In the drawings show:

[0027] FIG. 1 a first schematic sequence diagram of the method according to the invention; and

[0028] FIG. 2 a further schematic sequence diagram relating to a further development of the method according to the invention.

[0029] In FIG. 1 the determining of the ground model, referred to as calculation model here, is elucidated further. Based on specified ground parameters that can comprise a stiffness modulus or a specific weight of the ground and ground shear parameters as well as loads from the surrounding area and geometrical conditions, such as the strength of ground layers, a first ground model is calculated.

[0030] Furthermore, on the structural foundation and the structure, which can also include the construction site and the construction ground, measured data or measured values, e.g. relating to distortions, settlements, anchoring and lateral forces can be recorded by corresponding sensor means. According to the method pursuant to the invention these measured data or measured values which are indicated as d0 are compared with the measured values d to be expected that theoretically result from the calculation model. If a difference between the theoretically ascertained nominal values d and the actually measured values d0 lies within a tolerance eps, the input ground parameters are confirmed. In this case, a recalculation of the ground or calculation model does not take place.

[0031] However, if the difference value between the nominal values and the actual values exceeds the specified tolerance range eps, a computer unit carries out optimization algorithms, in which the previously assumed ground parameters are changed until a subsequent ground model or calculation model is developed on the basis of changed ground parameters mi that represent the actual conditions of the ground more realistically.

[0032] According to FIG. 2 the new ground model or calculation model thus ascertained can then be used for a retrospective calculation or recalculation of the design of the structural foundation or the structure. For this, initially the original design variables concerning the layout, which can be, for example, related to the securing of an excavation pit, an installation depth, number, length and position of the anchors, diameter and spacing of a pile wall and thickness of a diaphragm wall, are checked again and recalculated on the basis of the new calculation model.

[0033] In doing so, specification can be made by the computer unit as to a minimization e.g. of settlements and cutting forces in wall, base plate and foundation elements and of overall costs as well as to a maximization of the structural safety for example. On the basis of these specifications the computer unit can, by way of multicriterial optimization algorithms, calculate e.g. for further construction stages if design variables can or have to be changed under the specified criteria. In this way, for example a material-optimized, cost-efficient and/or particularly safe structural design can be accomplished.