土钉技术补强土质古窑受拉破坏裂缝

保护土遗址免遭损坏是一个难题。土钉锚杆技术在加固保存石质遗迹方面应用较多，而在土质遗址补强方面的应用则鲜有报道。船迫2号窑为一土质古窑，在移去古窑内部回填土的过程中，最薄弱断面部位出现受拉破坏裂缝。应用有限差分程序FLAC，在稳定性评价的基础上模拟分析了微型土钉补强该受拉破坏裂缝的可行性。参数研究包括土钉长度、倾斜角、间距和孔径等对补强效果的影响。考虑现场施工空间的限制和土遗址保存对外观的要求，提出了合理的补强设计和施工方案。微型土钉技术补强受拉破坏裂缝的成功实施，为土遗址的加固补强提供了典型案例，具有一定的借鉴意义。

Reinforcing tensile cracks of historical earthen kiln with soil nailing technique

Preservation of historical earthen sites against damage is one of the difficult problems. Rock bolt and soil nailing techniques, with its characteristics of in-situ reinforcement, has been frequently applied to strengthen rock-based ruins, yet their applications to earthen ruins are seldom reported. Dougaeri No.2 historical ruin is an underground historical earthen kiln, tensile cracks have been developed at the poorest location while removing the backfilled soil inside of the kiln. Finite difference method code- FLAC has been employed to evaluate the effectiveness of micro-soil nailing technique for reinforcing the tensile cracks. Parameter studies are performed to investigate the effect of nail length, inclination angle, spacing and diameter of drill hole. Considering the field practical condition and the specific requirements for the appearances of the earthen kiln’s preservation, reasonable reinforcement design and practice method have been presented. The successful application of micro-soil nailing for reinforcing tensile cracks of the kiln will be of benefit to the preservation of underground soil-ruins.