Movatterモバイル変換

When we left you in Egypt five months ago, we claimed a "strengthened resolve" to ultimately succeed in raising an obelisk (seeAngle of Repose). Well, we're back, and if all goes to plan, on September 11, a spanking new, 25-ton granite obelisk will stand upright at last. It will do so not in Aswan, alas, but in a quarry in Massachusetts, for we decided for logistical reasons to make this third attempt a bit closer to NOVA's home base in Boston.

This morning I drove out the quarry to see how things were shaping up. The first thing I saw upon entering the fog-shrouded quarry were some old friends. Rick and Wyly Brown, the father-and-son timberframers who helped us in Egypt, were back in action, with Rick running the show here. Wyly, his mother Laura, and fellow timberframer Ellen Gibson—who, like the Browns, works as a teacher and sculptor at the Massachusetts College of Art - were using chisels to shape the pivot timber, on which the obelisk will pivot on its way to verticality. These four are just part of a sizeable team that has been working for months to get ready.

"We're a really cohesive group," Rick told me as we threaded our way through heaps of granite blocks. "All of us have a passion for building, and we work well together, sharing ideas. It's not an ego thing, with someone walking away feeling someone else didn't use his idea."

I grasped his meaning. In Egypt, since we had people from all over the world who had never worked together and, in some cases, were new to the work they would do there, "cohesiveness" was not a word that immediately jumped to mind when describing our group.

As Rick showed me around, I came to realize that this crew was doing many things differently than the former had. Clearly some lessons were learned atHamada Rashwan's quarry.

The most obvious is the project's simpler design. Julia Cort, producer of the upcoming NOVA film "Obelisk II," opted for a version of the sandpit method thatRoger Hopkins had such success with in Egypt, albeit with a much smaller stone (seeA Tale of Two Obelisks). The obelisk-raising operation will begin with the 49,000-pound shaft lying horizontally on a gravel ramp, with its butt end hanging out over a concrete container filled to the brim with dry sand. (In ancient Egypt, such a container would probably have been built of thick walls of mud brick.) As team members slowly drain the sand through special doors at the bottom of the container, they will lower the obelisk into the turning groove (for a description, seeSecond Chance), in which it should rest at an angle of 75°. Then, weather permitting, on September 11 a huge group of pullers will yank the obelisk upright under controlled conditions.

All but complete, the ramp of "crush-and-run" gravel bears a wall of giant granite blocks at its high end. The obelisk will pivot over the top of this wall into the concrete-block container, which is about half finished. (Rick dubs it the "Lego sandbox" even though each block weighs about 10 tons.) By Sunday, the container should be finished and filled with sand, ready for sand removal starting Monday or Tuesday.

We wandered over to see the object of all the attention. Finely hewn from New Hampshire granite, the obelisk is worthy of any downtown plaza or presidential gravesite. Here we found three more members of the team tying a grommet of two-inch-thick Manila rope around the obelisk's pyramidion, the sharply tapering tip. Tall and willowy, Jim Kricker is a millwright from Saugerties, New York who restores sawmills and other historic structures. Grigg Mullen, a laconic soils engineer who teaches civil engineering at the Virginia Military Institute, is along with one of his students, Andy Smith. These three have been doing something else we didn't have time to do properly in Egypt: testing the heck out of the ropes, to avoid slippings and snappings like we experienced there (seeA Tale of Two Obelisks).

There are other different aspects as well, like no 90-degree edges on which ropes could abrade. And one language only (English). And perhaps most significant, more time to prepare for the big day. This makes it easier to keep to the spirit of the operation, which calls for thinking like the ancients. "When a problem comes up, we've tried not to throw 20th-century solutions at it, but back up and think how they would do it," Rick says. "How would they treat lines? Were they capable of splicing?"

About the only thing I can sense is exactly the same is the optimism. When I ask the three grommet-tiers if they think this raising will succeed, Mullen and Smith blurt out, "Oh yeah!" Kricker is only slightly more circumspect. "We think so," he said, and smiled. Watch for the next dispatch on Wednesday, September 1.

[8]ページ先頭