The Megalith Movers Prehistoric Engineering
Blog 12th December 2015    Below is a photo taken on thirtieth of November, which shows the obelisk at angle of about thirty-four degrees. At this time we were making good uninterrupted progress, simply transferring the sand-bags from one set of levers to the levers on the sectional fulcrum most recently rolled forward. The sectional scaffolding we were using instead of stone blocks was behaving impeccably, and seemed fully capable of continuing the erection as long as necessary.    During the following week we encountered the problems I described in last week’s blog, the story continues as below.    When I arrived on Monday the obelisk was still standing at an angle of thirty-seven degrees, and by the end of the session Steve and myself had completed the new section of scaffold and crib under the tip of the obelisk. This we reinforced with pit-props and shoring. Everything was looking good, but I knew that removing the middle section was going to be a delicate operation. We had to slowly transfer the weight from this section and redistribute the weight among the remaining three sections, and at this angle I didn't know if they were capable of withstanding the backward force.    Tuesday, Steve was due to renew residency permit so we arranged to continue Wednesday. In the event Steve had a problem with some of his paperwork and had to return the next day, so we didn't continue till Thursday.    I had been thinking about what we were preparing to do next for several days now, and still my original plan seemed to be the safest method. Which was to slowly remove the pit-props under the middle section, one at a time, retiring to a safe place in-between each operation. The first of the pit-props was the most difficult to remove and was also the most nerve racking. I called a halt after its removal, to reassess the situation. “Nothing has moved and there have been no strange noises either, I think we are safe to continue.”, said Steve. I was in agreement, so eventually we removed the remaining pit-props. Everything was quiet and still, and when we climbed up onto the scaffold we found the wedges and packing loose enough to remove.    The plan had worked beautifully, we could now dismantle the crib and scaffold, and in the space created could cast the first of our stone blocks, which will eventually become our stone staircase. These stone (concrete) blocks will be cast separately, and be capable of independent movement, so that the staircase can be moved forward as the obelisk rises.    See the photo below of the situation as it stands today. The obelisk has reached an angle of thirty-seven degrees, and we have successfully removed the section of scaffold nearest the obelisk. In the space created we will cast what will be the first step of our stone staircase.    After the concrete has hardened enough, we will build a crib on top of this step to support the obelisk, and will then remove the next section of scaffold and cast another stone, and so on, until the first layer is complete. Eventually we will cast more stones on top of the layer below, and so on, until we have completed the staircase.    As the mass of stone in this staircase will be much greater than the mass of the obelisk, we will have no more instances of the ground moving beneath our feet as we lever up the obelisk. We will then be in a position to continue with the erection, while standing on a rock solid surface. As the obelisk moves forward and upward to its final position, we will move the stone staircase forward as required, which will demonstrate the method had we used stone blocks from the beginning.   << previous blog page next blog page >> To read & post comments click here return to top of this page

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