Abstract:
본 발명은 도로 품질성능지수 산출방법, 도로 품질 평가방법, 도로 품질 평가장치에 관한 것으로서, 정량화된 품질 평가기준인 품질성능지수를 도입함으로써 도로 건설에 따른 각 시공 목적물의 품질을 객관적으로 판단할 수 있는 도로 품질성능지수 산출방법, 도로 품질 평가방법, 도로 품질 평가장치에 관한 것이다. 이를 위해 도로 건설에 따른 각 공종의 평가항목인 공종별 평가항목을 분류하는 단계(S610); 분류된 공종별 평가항목에 따른 평가등급 및 가중치를 산출하는 단계(S620); 및 평가등급 및 가중치를 이용하여 시공 목적물에 대한 정량적 평가지수인 품질성능지수를 산출하는 단계(S630);를 포함하는 것을 특징으로 하는 도로 품질성능지수 산출방법이 개시된다.
Abstract:
PURPOSE: A construction method of a high-strength pier using concrete and a pier thereby are provided to prevent cracks caused by heat of hydration generated when concrete is cured. CONSTITUTION: A construction method of a high-strength pier using concrete is as follows. A foundation having first compressive strength is formed using first concrete(S100). The first compressive strength is 20-30MPa. A column is formed on the foundation using second concrete to have second compressive strength relatively higher than the first compressive strength(S200). A coping having the second compressive strength is formed on the column using the second concrete(S300). The second compressive strength is 40-50 MPa.
Abstract:
PURPOSE: A method for calculating a road quality performance index, a method for evaluating road quality, a device for evaluating road quality, and a recording medium thereof are provided to reduce maintenance costs for a roadway construction object by improving quality through the evaluation of the quality performance index. CONSTITUTION: A road quality evaluating device classifies estimation items by process according to roadway construction to calculate a road quality performance index(S610). After the estimation items by process are classified through a survey, the advice of an expert, or site evaluation, the device calculates a weighted value and an evaluation grade according to the classified estimation items(S620). The device calculates a quality performance index about a construction object by using the weighted value and the evaluation grade(S630). [Reference numerals] (AA) Start; (BB) End; (S610) Classifying evaluation times by processes which are the evaluation items of each process according to roadway construction; (S620) Calculating evaluation grades and weighted values according to the classified evaluation items of each process; (S630) Calculating quality performance index which is a quantitative evaluation index about a construction object using the evaluation grades and the weighted values
Abstract:
PURPOSE: A guardrail is provided to enhance a protecting effect even if upper and lower rails are installed only on one side around a lever. CONSTITUTION: A guardrail comprises posts(100), an upper rail(110), a lower rail(120), a rail stiffener(130), and dampers(140). The posts are formed in a cross section of a Z shape and are installed on road at a given interval. The upper and lower rails are installed between the posts. The upper and lower rails protect vehicles by lowering the speed of a vehicle in collision with the vehicle. The rail stiffener is coupled to both the upper and lower rails and maintains a gap between the rails. The dampers are respectively installed between the posts and the upper and lower rails to increase the protecting effect.
Abstract:
PURPOSE: A risk prediction system of construction accident and a method thereof are provided to prevent the safety accident efficiently by estimating the safety accident for each factor in a construction spot. CONSTITUTION: When an accident happens in a construction spot, an accident reporting unit(20) inputs accident information on period, subject and working conditions. An accident analysis unit(30) analyzes accident information data and previous accident information to allocate a score for each information element, and estimates a safety accident risk rate based on the number in which the scores are summed up. A safety accident risk rate estimation unit(40) displays a risk rate and a risk grade for entire and partial information elements inputted form the accident reporting unit and the accident analysis unit.