US4699546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for compacting a soil stratum using vibrations
Assignee: MRC TECHNIQUE SERVICES GmbH
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Filing: 1985-11-08
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Granted: 1987-10-13
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Expires: 2005-11-08
Abstract
Abstract The present invention relates to a method and apparatus for compacting by vibrations a soil stratum with the aid of at least one vibration-transferring member (2) which may be driven into the soil stratum, said member transferring vibrations from a vibration generating means (1) to the soil stratum. In accordance with the invention the axial extension of the member (2) is variable both before and in conjunction with the vibration compaction by the member being implemented such as to be resilient, elastic or flexible.
Inventors
- 👤 Karl R. Massarsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:13
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/046; E02D3/054
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
158 words
A method of compacting with the aid of vibrations a soil stratum consisting of one or more layers, comprising driving at least one vibration-transferring member, having a variable axial extension both before and in conjunction with vibration compaction, into the soil stratum, mounting a variable frequency vibrator on the vibration-transferring member to cause the latter during vibration of said vibrator to vary along its axial extension for activating surrounding earth stratum, monitoring soil oscillation amplitude on thus activating the soil stratum to provide signals having a frequency content which is a function of the earth stratum activated, analyzing the frequency content of said signals to determine the natural frequency of the earth stratum or one of its overtones, and continuously adjusting the frequency of the vibrator and the vibration-transferring member as a function of the determined natural frequency of the earth stratum or one of its overtones, said frequency varying with the wave velocity of the earth stratum.
Claim 2
Independent Claim
158 words
A method of compacting with the aid of vibrations a soil stratum consisting of one or more layers, comprising driving at least one vibration-transferring member, having a variable axial extension both before and in conjunction with vibration compaction, into the soil stratum, mounting a variable frequency vibrator on the vibration-transferring member to cause the latter during vibration of said vibrator to vary along its axial extension for activating surrounding earth stratum, monitoring soil oscillation amplitude on thus activating the soil stratum to provide signals having a frequency content which is a function of the earth stratum activated, analyzing the frequency content of said signals to determine the natural frequency of the earth stratum or one of its overtones, and continuously adjusting the frequency of the vibrator and the vibration-transferring member as a function of the determined natural frequency of the earth stratum or one of its overtones, said frequency varying with the wave velocity of the earth stratum.
Claim 3
Dependent Claim
17 words
Method as claimed in claim 1 wherein the axial extension of the vibration-transferring member is changed elastically.
Claim 4
Dependent Claim
26 words
Method as claimed in claim 1, wherein the axial extension before or during compaction is regulatably varied with relation to the stiffness of the soil stratum.
Claim 5
Dependent Claim
24 words
Method as claimed in claim 1, wherein liquid or other material can be led through the vibration-transferring member and out into surrounding earth strata.
Claim 6
Dependent Claim
122 words
Apparatus for compacting with the aid of vibrations a soil stratum consisting of one or more layers, and including at least one vibration-transferring member adapted to be driven into the soil stratum, and a vibration generating means operatively connected to the vibration-transferring member for transferring vibrations produced by said vibration generating means to said vibration transferring member and including at least one sensor, an analyzer and a control means for continuously adjusting the frequency of the vibration-transferring member for agreement with the natural frequency of the soil stratum or one of its overtones, said frequency varying with the wave of velocity of the soil stratum, said vibration-transferring member being variable along its axial extension both before and in conjunction with vibration compaction.
Claim 7
Dependent Claim
122 words
Apparatus for compacting with the aid of vibrations a soil stratum consisting of one or more layers, and including at least one vibration-transferring member adapted to be driven into the soil stratum, and a vibration generating means operatively connected to the vibration-transferring member for transferring vibrations produced by said vibration generating means to said vibration transferring member and including at least one sensor, an analyzer and a control means for continuously adjusting the frequency of the vibration-transferring member for agreement with the natural frequency of the soil stratum or one of its overtones, said frequency varying with the wave of velocity of the soil stratum, said vibration-transferring member being variable along its axial extension both before and in conjunction with vibration compaction.
Claim 8
Dependent Claim
13 words
Apparatus as claimed in claim 5, wherein the vibration-transferring member is variably elastic.
Claim 9
Dependent Claim
16 words
Apparatus as claimed in claim 5, wherein the vibration-transferring member comprises a pipe or rod-shaped means.
Claim 10
Dependent Claim
12 words
Apparatus as claimed in claim 7, wherein the means is helically formed.
Claim 11
Dependent Claim
14 words
Apparatus as claimed in claim 7, wherein the means comprises a plurality of sections.
Claim 12
Dependent Claim
25 words
Apparatus as claimed in claim 7, wherein the vibration-transferring member is a pipe-shaped means, characterized in that the cylindrical surface of the means has openings.
Claim 13
Dependent Claim
14 words
Apparatus as claimed in claim 10, wherein each opening is covered by a filter.
Claim 14
Dependent Claim
20 words
Apparatus as claimed in claim 7, wherein the vibration-transferring member is provided at its lower end with a stamping means.
Claim 15
Dependent Claim
21 words
Apparatus as claimed in claim 9, characterized in that mutually adjacent sections of the means are separated by a resilient element.
Claim 16
Dependent Claim
16 words
Method according to claim 1, wherein the axial extension of the vibration-transferring member is changed resiliently.
Claim 17
Dependent Claim
16 words
Method according to claim 1, wherein the axial extension of the vibration-transferring member is changed telescopically.
Claim 18
Dependent Claim
28 words
Method according to claim 1, wherein liquid or other material can be led from surrounding earth strata through the vibration-transferring member for injecting draining liquid or other material.
Claim 19
Dependent Claim
12 words
Apparatus as claimed in claim 5, wherein the vibration-transferring member is resilient.
Claim 20
Dependent Claim
14 words
Apparatus as claimed in claim 5, wherein the vibration-transferring member is of telescopic construction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |