초록 ▼

쉴드터널 공법은 일률적으로 비배수 터널로 설계 및 시공되고 있으나, 비배수 설계임에도 불구하고 지속적인 지하수 누수가 고질적인 문제가 되고 있음. 또한, 토압 및 수압 모두를 고려하여 설계되기 때문에 안정성 확보를 위해 세그먼트 단면 두께를 증가시켜야 하며, 기존 터널공법에 비해 안정성 및 시공성 면에서 우수한 공법임에도 불구하고 고가의 공사비로 그 적용성이 높지 않은 실정임.
본 연구에서는 배수 유로홈 기술 개발을 통해 쉴드터널에 유입되는 지하수를 자연 배수시킬 수 있는 배수형 쉴드터널을 개발하였음. 또한, 지하수 유입으로

쉴드터널 공법은 일률적으로 비배수 터널로 설계 및 시공되고 있으나, 비배수 설계임에도 불구하고 지속적인 지하수 누수가 고질적인 문제가 되고 있음. 또한, 토압 및 수압 모두를 고려하여 설계되기 때문에 안정성 확보를 위해 세그먼트 단면 두께를 증가시켜야 하며, 기존 터널공법에 비해 안정성 및 시공성 면에서 우수한 공법임에도 불구하고 고가의 공사비로 그 적용성이 높지 않은 실정임.
본 연구에서는 배수 유로홈 기술 개발을 통해 쉴드터널에 유입되는 지하수를 자연 배수시킬 수 있는 배수형 쉴드터널을 개발하였음. 또한, 지하수 유입으로 인한 수압 저감 현상을 평가하고, 쉴드 라이닝에 작용하는 하중 감소를 통해 기존 세그먼트 단면을 20% 축소시킬 수 있는 슬림형 쉴드터널을 개발하였음.
본 연구개발을 통해 최종적으로는 쉴드 세그먼트 재료비 20% 절감, 쉴드터널 전체공사비 10% 절감을 달성하였으며, 장기적으로는 쉴드터널의 공사비 절감을 통해 기존 터널공법과의 가격 경쟁력을 확보할 수 있을 것으로 판단됨.

Abstract ▼

Ⅳ. Research and Development Results
■ Research of shield tunnel and analysis of the problem
Analyzes the trends for the construction practices and research in Japan and overseas shield tunnel, it was carried out investigation about the problems that occur in the existing shield tunneling metho

Ⅳ. Research and Development Results
■ Research of shield tunnel and analysis of the problem
Analyzes the trends for the construction practices and research in Japan and overseas shield tunnel, it was carried out investigation about the problems that occur in the existing shield tunneling method.
■ water leak condition and a flood prevention measure in shield tunnel
Perform a search for the quantity with respect to the inlet tunnel of the tunnel and outside the country of the region, in the shield tunnel investigation and analysis were carried out on the water measures to prevent leakage.
■ Verification of the need for drainage design through evaluation of water stop
Perform a search of the index material types and criteria for the water of the shield tunnel, which was carried out the study of the leak through the prediction of the time index to evaluate the performance life material short- and long-term durability.
■ Suggestion of drain shield tunnel
Establishing the theoretical background of the drai shield tunnel through the research survey of pressure acting on the tunnel lining segments according to multiple criteria and review the applicability of the drainage passage home through the drainage performance and reliability compared with existing drainage type tunnel ReviewIt was performed.
■ Selection of the optimal back fill material of drain shield tunnel
Perform a search of multiple shield-type characteristics of the back fill material to select an optimal back fill material in the tunnel, and conducted experiments for injection performance and water permeability for the application is available after the filler material to the back surface of the multiple-type shield tunnel and evaluate the environmental performance of the selected material.
■ Development of backfill system of drain shield tunnel
Trying to efficiently inject the back fill material in a drain shield tunnel, by making the injection device, the performance tests were carried out.
■ Evaluation of drainage hole through down scale experiment
A scale model experiment apparatus was manufactured to evaluate experimentally the performance of the drainage flow path grooves, as the pressure increases over the control of ground water pressure was carried out to evaluate whether to go to the actual drainage passage along the groove. In addition, experiments were carried out as to whether or not clogging occurs in the drain flow path grooves developing according to the type of fill material behind the back surface.
■ Evaluation of the performance of drainage hole through real scale experiment
The movement of ground water into the tunnel through the back fill material to be shielded tunnel behaves as a multiple type, the function of the drain passage grooves inside the movement of the ground water to induce drainage segments can be carried out in the most important role. This thread through a large experiment to perform multiple performance tests of the groundwater flow through the actual soil conditions and drainage grooves to evaluate the applicability of the function of the filler and drainage hole.
■ Model test of shield tunnel considering the drained/undrained condition
In various ground conditions we developed a tunnel model test equipment to analyze the applied stress of the shield tunnel lining according to multiple criteria. Also it analyzed the effects stress and internal stress in the shield tunnel lining in free field conditions change sikimyeo various stresses and underground drainage tunnel model was developed using the lab equipment.
■ Review of the shield tunnel structure through numerical stability
Simulation of a shield tunnel construction in underground and stress resultant of the tunnel lining, applied stress, in order to determine the subsidence and tunnels, including groundwater flow numerical analysis was carried out considering the field conditions. This allows the water table, tunnel depth, soil type and backfill (PS Ball), were compared the effects of tunnel lining in accordance with the change.
■ Evaluation of the action of the pressure in the shield tunnel through the field measurement
The instrument is installed in a segment in the shield tunnel construction site in order to determine the soil pressure and the actual pressure acting on the back surface shield tunnel, which was subjected to the measurement site.
■ Suggestion of standard cross-section of drain shield tunnel
The review was carried out with respect to the reduction potential of the thin shield tunnel through the safety review was carried out by calculating the reduced rate to the standard cross-sectional design.
■ Evaluation of workability of drain shield tunnel
Through the BIM by analyzing the detailed process of the thin shield tunnel analyzed the construction speed, backfill material and workability evaluation was performed risk analysis.
■ Evaluation of economic of slim type shield tunnel
Slim type shield tunnel through a detailed economic analysis was performed by process life cycle cost (LCC) and VE evaluation, it was evaluated according to the thinner cross-section with reduced CO2.
■ Maintenance control plan of drain shield tunnel
Slim type shield tunnel for maintenance of drainage hole of the design of an air suction gun, which was carried out in the maintenance plan for the conceptual design.
■ Prediction of future demand for drain shield tunnel and assessment of marketability
Through the investigation of the domestic segment sales companies involved in predicting the future growth potential of the market and proposed a plan future projects and commercial business model enemy.