China News Agency, Lanzhou, May 19 (Reporter Cui Lin) Cai Jianhong, Director of the Cultural Relics Research Office of the Tiantishan Grottoes Conservation Research Institute, Wuwei City, Gansu, was interviewed by a reporter from China News Agency on the 19th. The cave No. 13 in the “source” cave caused water seepage in the ground and rock mass cracks on both sides, causing the bottom of the big Buddha's folds, the feet of the kings on both sides and the feet of the kings to fall off the mud layer, and local rock masses Also affected by the migration of water, the rock mass has a large area of collapse.
"The feet of the Buddha and the feet of the heavenly kings on both sides must be repaired, otherwise the moisture and salt will pass through the fiber burrs of the mud layer, destroying more mud layers. These factors also greatly affect the integrity and aesthetics of the Buddha." Cai Jianhong said that the Dunhuang Research Institute entrusted the Dunhuang Research Institute to rescue the foot of the 13th cave and the local dangerous rock mass. On the basis of the original design plan, it has further understood the source of water seepage, and invited relevant experts to conduct on-site surveys and put forward reasonable proposals. Governance opinions, construction is currently underway.
At this stage, about 40 cubic meters of surrounding concrete has been removed, and the ground has been lowered by 110 cm; the ground has been filled with pebbles to prevent groundwater from rising through the fiber burrs of the mud layer. Drainage pipes have also been buried from the left, middle, and right sides of the Buddha to the ground. Central collection well.
It is worth mentioning that the engineering team cooperated with Xi'an Yuanzhi System Technology Co., Ltd. to install monitoring probes on the rock mass, ground and water collection wells around the foot of the Buddha to monitor the moisture changes of the rock mass in real time.
The construction party determined the size of the big Buddha's feet based on the original data, and made various models of the big Buddha's feet according to the characteristics of the big Buddha's feet in other places in the country. Finally, they chose the group that best fits the big Buddha's feet in the Tiantishan Grottoes for implementation. Now two have been completed. The overall shaping of the Buddha's feet and other work.
"The main factor affecting the construction is water seepage. The poor water seepage treatment directly leads to the new layer of mud replenishment. The subsequent work is in vain." Cai Jianhong revealed that after a winter test, the ground and wall seepage treatment achieved the expected results. There is no dampness in the new mud layer.
In 2021, the construction party will make plastic repairs on the folds of the Great Buddha, the feet of the king, and the feet of the king. Since there are no original photos of the feet, they can only make a model based on the shape of the old photos, and finally determine the shape and style before proceeding. Construction, all repairs are planned to be completed by the end of June.
Cai Jianhong said that after the project is implemented, the mud layer on the surface of the statue can be prevented from falling off due to water seepage; the feet of the Buddha, the feet of the heavenly kings on both sides and the Bianqian will not collapse due to water seepage from the ground.
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