Abstract:
PURPOSE: A soil stabilizer including ultra fine fly-ash is provided to enable the solidification of weak ground by the injection of an environmentally-friendly solidifying agent having 20% or less of a cement component. CONSTITUTION: A soil stabilizer including ultra fine fly-ash improves a base by being injected into excavated ground. The soil stabilizer includes a solidifying agent or a solidifying agent and accelerating agent. The solidifying agent includes 20~60 wt% of fly ash with a powder degree of 8,000 cm^2/g or more; 1~10 wt% of CSA having a CSA with a powder degree of 8,000 cm^2/g ore more; 1~10 wt% of anhydrous gypsum, 20~40 wt% slag with a powder degree of 5,000 cm^2/g; 20~60 wt% of flyash with a powder degree of 8,000 cm^2/g or more; 1~10 wt% of CSA with a powder degree of 8,000 cm^2/g or less; 1~10 wt% of CSA with a powder degree of 8,000 cm^2/g; and 5~20 wt% of one kind normal cement.
Abstract:
PURPOSE: A retaining wall block for retaining wall construction and a construction method of a retaining wall using a retaining wall block and a retaining wall block and a geogrid are provided to prevent the inflow of water using water sealing mat and by reinforcing a foundation using a geogrid. CONSTITUTION: A retaining wall block for retaining wall construction is as follows. A foundation(100) is formed along a construction area floor. A retaining wall block(10) is stacked on the foundation. A drainage guide pipe(200) is filled with rubble and soil and established in the retaining wall block back side. A support stand(22) is inserted into each hook of a geogrid(20). The support stand is fitted in a hanging groove(13) of the retaining wall block. The retaining wall block is stacked on the top of the retaining wall block. The back side of the retaining wall block is filled with rubble and soil. A cutoff mat(600) is installed to the retaining wall block and construction area. The soil is installed to the top of the cutoff mat. A side ditch(700) is formed on the stepped soil.
Abstract:
PURPOSE: A construction method of a T-shaped steel material for reinforcing a column structure of a building and a reinforcing structure of a column structure is provided to improve durability by maintaining the tensed state of a wire rope. CONSTITUTION: A T-shaped steel material(1) for reinforcing a column structure of a building is composed of pressurizing pieces(2) and earthing pieces(3). The pressurizing pieces comprise grooves(71) and wire supporting units, and support wire ropes(20). And the pressurizing pieces maintain the elastic force of the wire ropes. The wire supporting units are coupled to both sides of the grooves.
Abstract:
PURPOSE: A process for constructing a structure with vibration-resistant or vibration-proof property is provided to protect the structure from damage by using a jacking method not to occur external force to cause vibration or alternation of the structure and to form a space for mounting a vibration-proof device. CONSTITUTION: The process comprises steps of forming a working space by digging a ground(2) around a structure(1); boring underground of the structure horizontally and inserting a number of hollowed pipes into the bored holes to form a pipe loop by digging; arranging a cable(7) in the pipe loop and fixing one end of the cable to outside, and connecting the other end to a box(6) having a front shoe; drawing the cable to allow the box advanced to the underground to form a pilot tunnel; and mounting a vibration-proof device inside the tunnel to absorb vibration energy and protect transfer of the vibration to the structure.