CAJ | 학술논문

市政工程中管线埋入地下采用的基本流程是先开挖沟槽，将开挖的原土作为渣土处理，待管线在沟槽中安放后再用二灰土石填埋沟槽，经夯实后铺设沥青或混凝土路面。为了有效利用沟槽开挖土、减少二灰土石用量，建议采用土工袋技术处理，即将沟槽开挖土装入土工编织袋后回填至沟槽中。阐述了土工袋技术原理，并依托南京市雨污分流工程，对用土工袋回填的沟槽进行了平板载荷试验、落锤式挠度检测和路面振动测试，评价土工袋沟槽的回填效果。结果表明：土工袋在提高沟槽承载力、减少沉降变形、削弱交通振动干扰等方面具有明显效果。土工袋避免弃土外运，减少了扬尘污染，不失为一种绿色、环保、经济的工程新技术。
시정공정중관선매입지하채용적기본류정시선개알구조，장개알적원토작위사토처리，대관선재구조중안방후재용이회토석전매구조，경항실후포설력청혹혼응토로면。위료유효이용구조개알토、감소이회토석용량，건의채용토공대기술처리，즉장구조개알토장입토공편직대후회전지구조중。천술료토공대기술원리，병의탁남경시우오분류공정，대용토공대회전적구조진행료평판재하시험、락추식뇨도검측화로면진동측시，평개토공대구조적회전효과。결과표명：토공대재제고구조승재력、감소침강변형、삭약교통진동간우등방면구유명현효과。토공대피면기토외운，감소료양진오염，불실위일충록색、배보、경제적공정신기술。
The basic way to bury pipelines into ground in the municipal projects is:excavating a trench firstly, and throwing away the excavated soils as wastes; backfilling the expensive lime-ash soil into the trench after the pipelines are placed properly; tamping foundation and laying asphalt or concrete pavements. In consideration of recycling the excavated soils and reducing the use of lime-ash soil, soilbag technique is suggested in urban trench backfills so as to cut down the project costs. The mechanism of soilbag technique is briefly elucidated herein; and several field tests such as plate loading test, falling-weight deflection and vibration response measurements are then carried out respectively to evaluate the benefits of a soilbag-trench, with the strong support of the Rain and Sewage Diversion Project in Nanjing. The test results show that soilbag technique performances superbly in improving the bearing capacity of subgrade, decreasing the settlement of roadbed as well as in reducing and isolating the traffic-induced vibrations, compared with the common backfill scheme. It is also proved that backfilling the trench with soilbags is a new green, environment-friendly and economical approach for the municipal projects as a result of avoiding the removal of discarded soils and controlling the pollution of raised dust.