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A steel I-beam frame was constructed to enable the bobcat to reach the area to be dredged. A silt curtain was installed to prevent turbidity from entering the lake.
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Click on an image to see an enlarged view
As in the previous job, holes were drilled into the cliff face for steel rock anchors to be grouted in place. Wire mesh was welded to these anchors in preparation for sprayed concrete to be applied to stabilize the cliff face. |
A steel sheet pile seawall with support poles drilled and grouted into bedrock was installed. We reshaped the cliff face to prepare for the drilling of rock anchors and the application of sprayed concrete to stabilize the bank. The job we had previously completed is visible in the photograph with the red border. (For more pictures of this completed job, visit the Completed Projects page). Steel I-beams and framing were installed to support a wood wall of 6" x 6" timbers against the foot of the cliff.
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The sheet piling for the first and second boathouse piers were installed. After the water was pumped out, the bedrock was core drilled in preparation for the support steel piling to be grouted into place. When this was completed, the supporting steel frame was welded into place. When the framework is complete, the pier is filled with concrete. |
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After the area was cleaned, drilling on the cliff face continued. |
Early in the spring, a large
section of the limestone cliff broke away. This chunk of rock had to
be broken up and removed, and the remaining cliff stabilized. After the removal of loose stone from the area of the cliff that had fallen, we were left with a knob of solid rock. It was decided that this would act as support for a portion of the back of the proposed boathouse. It was enclosed in a concrete wall.
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Click on an image to
see an enlarged view To provide extra stabilization, vertical steel I-beams were pinned to the cliff face. Rebar was placed between the I-beams to support the wire mesh, which in turn would support the application of sprayed concrete. The remaining cliff face was covered with wire mesh in preparation for the application of concrete. |
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Concrete was sprayed onto the wire mesh and the cliff face. This stabilizes the face and prevents further erosion. This is the same method we used in the previous job (see Completed Projects page). After the final application, the cliff is now stabilized, has a natural appearance, and blends well with the property next door. |
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We then went back to installing the
piers to support the boathouse.
Click on an image to see an enlarged view |
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All six piers are now installed, and the installation of the steel sheet pile wall along the shoreline is complete. |
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The temperatures at the job site were rather chilly this spring. One morning we were greeted with a thick coating of ice over everything. Click on an image to see an enlarged view |
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The nine piers are now completed. Steel square tube was installed on the piers, and is used for support columns for the entire structure. Steel I-beams were brought down and placed on the support columns. They were then bolted and welded in place. |
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We have used our new modular aluminum barge to help place the steel during this phase of construction. |
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All of the steel supports for the
boathouse are now in place. The concrete pad at the top of the cliff where the long-stick excavator sat was topped off with a timber wall. |
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| The wall was then backfilled, and will be covered with rolled sod for a finished lawn. |
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We replaced cedar trees which had been removed along the property boundary. |
The work continues.....
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