Monitoring system for concrete pilings and method of installation

1. A method of monitoring pilings, comprising:

inserting a sensor package between strands or reinforcements in a piling form to position sensors in a core area of a piling;

connecting a radio module to the piling, the radio module being in communication with the sensor package;

casting the piling;

determining the strain pre-load and recording it for later use;

driving the piling and obtaining data from the sensor package during driving;

at least one of monitoring the data obtained from the sensor package during driving and monitoring and using the data during the driving to adjust driving parameters for the pile; and

using absolute internal strain information from the data obtained from the sensor package located inside the piling core to maximize driving efficiency in real time during driving of the piling.

2. The method of claim 1 , further comprising:

monitoring absolute internal strain information to ensure that driving forces do not exceed a level that would produce a damaging tension stress condition in the piling.

3. The method of claim 1 , further comprising:

monitoring absolute internal strain information for changes in pre-load during driving; and

using this information to predict piling failure.

4. The method of claim 1 , further comprising:

inserting the sensor package at a tip of the piling and inserting a second sensor package at a top of the piling.

5. The method of claim 1 , further comprising:

detecting wave speed anomalies using the data and a known distance between the sensors in the piling; and

comparing the wave speed anomalies against pre-defined conditions for failure detection.

6. The method of claim 1 , further comprising:

storing the data obtained from the sensor package in a memory.

7. The method of claim 1 , further comprising:

transmitting the data obtained to a piling history database for further lifecycle and long term monitoring.

8. The method of claim 7 , further comprising:

cutting off a top of the piling; and

pulling excess wire or cable located inside a hollow tube from a wire reservoir in proximity to a piling tip in order to connect the sensor package located at a tip of the piling to the networked monitoring node.

9. The method of claim 1 , further comprising:

retrofitting the piling installing a networked monitoring node that is connected to the sensor package;

retaining unique addressing information of a given piling, by logically linking a sensor package address ID; and

connecting the node to an external gateway for data transmission for long term monitoring.

10. A method of long-term monitoring for pilings, comprising:

forming a cast concrete piling with a sensor package located in a core area of the piling;

determining a strain pre-load and recording it for later use;

driving the piling and obtaining data from the sensor package during driving;

retrofitting the piling by installing a networked monitoring node that is connected to the sensor package;

retaining unique addressing information of a given piling, by logically linking a sensor package address ID; and

connecting the node to an external gateway for data transmission for long term monitoring.

11. The method of claim 10 , further comprising:

storing pile data in a memory located in the piling.

12. The method of claim 11 , further comprising:

for a pile having the top cut off after driving, pulling excess wire or cable located inside a hollow tube from a wire reservoir in proximity to a tip wire or cable reservoir in order to connect a tip sensor package to the networked monitoring node.

13. The method of claim 10 , further comprising:

providing a GPS at the pile;

obtaining a location for the pile; and

obtaining soil properties for the location.

14. The method of claim 10 , further comprising:

providing a re-writable memory in the piling; and

storing and updating data in the re-writable memory.

15. A suspension assembly for positioning at least one sensor between strands in a concrete structure, comprising:

first and second U-shaped frames connected to one another;

at least one strand engaging member located on each of the U-shaped frames facing away from one another and adapted to engage opposing reinforcement strands or bars of a concrete structure;

a slidable carrier attached to the frames for supporting at least one gauge;

the first and second U-shaped frames are spring biased away from one another; and

centering springs extend between the slidable carrier and the frame for movably sliding the slidable carrier to a centered position on the U-shaped frames, the slidable carrier including provisions for attaching sensors.

16. The suspension assembly of claim 15 , wherein at least one of the strand engaging members is formed of a spring material.

17. The suspension assembly of claim 15 , further comprising:

a strain gauge connected to the slidable carrier.

18. The suspension assembly of claim 15 , further comprising:

an accelerometer connected to the slidable carrier.

19. A suspension assembly for positioning at least one sensor between strands in a concrete structure, comprising:

first and second U-shaped frames connected to one another;

at least one strand engaging member located on each of the U-shaped frames facing away from one another and adapted to engage opposing reinforcement strands or bars of a concrete structure,

a slidable carrier attached to the frames for supporting at least one gauge;

a first opening with at least two opposing V-shaped side walls for registration with a first sensor housing located in the slidable carrier or a mounting plate connected thereto; and

a second opening defined in the slidable carrier or the mounting plate connected thereto for a second sensor.