Soil stabilizing method and apparatus
First Claim
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1. A method of introducing powdery filler material into base material of a load base, comprising the steps of:
- (a) operating a tiller machine to till a layer of the base material by means of a tiller element under a hood;
(b) simultaneously with step (a), spraying a dense spray of water through a plurality of nozzles extending from a first manifold through the hood over a rotary tiler element and located ahead of a rotation axis of the tiller element to prewet base material being tilled;
(c) simultaneously with steps (a) and (b), spraying a powdery filler material from a plurality of nozzles extending from a second manifold through the hood behind the first manifold and located behind the rotation axis to effectuate uniform mixing of the powdery filler material with the tilled, prewetted base material and to prevent spreading of dust including the powdery filler material outside of the shroud.
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Abstract
A tilling/stabilization apparatus for tilling and stabilizing a roadbed or other base layer of soil includes a large manifold for receiving metered amounts of pressurized fly ash or other powdery filler, binder, and/or sealer material and injecting it in the vicinity of a rotating tiller that is tilling the roadbed. A water manifold passing through a housing surrounding the tiller produces a dense water mist inside the housing, causing dust to settle and providing a cementitious mix of the fly ash with the tilled roadbase material. Reliable, economical filling of roads and stabilization of a road base is achieved.
29 Citations
12 Claims
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1. A method of introducing powdery filler material into base material of a load base, comprising the steps of:
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(a) operating a tiller machine to till a layer of the base material by means of a tiller element under a hood; (b) simultaneously with step (a), spraying a dense spray of water through a plurality of nozzles extending from a first manifold through the hood over a rotary tiler element and located ahead of a rotation axis of the tiller element to prewet base material being tilled; (c) simultaneously with steps (a) and (b), spraying a powdery filler material from a plurality of nozzles extending from a second manifold through the hood behind the first manifold and located behind the rotation axis to effectuate uniform mixing of the powdery filler material with the tilled, prewetted base material and to prevent spreading of dust including the powdery filler material outside of the shroud. - View Dependent Claims (2, 3, 4)
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5. In a moving tiller/stabilization machine, the improvement comprising:
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(a) a first manifold having a plurality of nozzles extending from the first manifold through a top of a housing surrounding a rotary tiller element, the nozzles of the first manifold being located in front of a rotation axis of the rotary tiller element; (b) means for conducting water from a first source at a preselected pressure to uniformly spray a selected amount of water from the nozzles into the base material being tilled by the rotary tiller; (c) a second manifold having a plurality of nozzles extending from the second manifold through the top of the housing, the nozzles of the second manifold being located behind the rotation axis; (d) means for conducting powdery material from a second source and spraying it through nozzles extending from the second manifold into the housing behind the spray of water. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method of introducing powdery binder material into base material of a load base, comprising the steps of:
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(a) operating a tiller machine to till a layer of the base material by means of a tiller element under a hood; (b) simultaneously with step (a), spraying a dense spray of water through a plurality of nozzles extending from a first manifold through the hood over a rotary tiller element and located ahead of a rotation axis of the tiller element to prewet base material being tilled; (c) simultaneously with steps (a) and (b), spraying a powdery material from a plurality of nozzles extending from a second manifold through the hood behind the first manifold and located behind the rotation axis to effectuate uniform mixing of the binder material with the tilled, prewetted base material and to prevent spreading of dust including the binder material outside of the shroud.
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Specification