KR-20260062553-A - STRUCTURAL REINFORCEMENT FOR JOINTS BETWEEN UNDERGROUND SLURRY WALL PANELS USING THE SAME

KR20260062553AKR 20260062553 AKR20260062553 AKR 20260062553AKR-20260062553-A

Abstract

The present invention is intended to structurally reinforce the connection between a preceding panel and a succeeding panel by interposing them between a preceding panel and a succeeding panel that are constructed with a time difference and arranged adjacently in an underground continuous wall. The structural reinforcement member for a connecting section of an underground continuous wall panel according to the present invention is characterized by comprising: a front plate formed long in the depth direction and disposed between a front panel and a trailing panel; a rear plate formed at least one in the middle of the front plate and positioned backward from the front plate; a connecting plate formed by being bent at the top and bottom of the rear plate and connected to the front plate; a main body having a pair of side plate sections formed by being bent from both sides of the main body and a pair of flange sections extending along the width direction of the underground continuous wall from the pair of side plate sections; and a separating plate detachably coupled between the pair of side plate sections of the main body.

Inventors

김성우
이주희

Assignees

김성우
이주희

Dates

Publication Date: 20260507
Application Date: 20241029

Claims (6)

It is intended to be interposed between a preceding panel and a succeeding panel that are constructed with a time difference in an underground continuous wall and arranged adjacently, and to structurally reinforce the connection between the preceding panel and the succeeding panel. A main body comprising a front plate positioned between the preceding panel and the succeeding panel and formed to be elongated in the depth direction, a rear plate positioned at least once in the middle of the front plate and formed at a position retracted from the front plate, and a connecting plate formed by being folded at the top and bottom of the rear plate and connected to the front plate, a pair of side plate portions formed by being folded from both sides of the main plate portion, and a pair of flange portions extending along the width direction of the underground continuous wall from the pair of side plate portions; and A structural reinforcement member for an underground continuous wall panel connection section, characterized by having a separating plate that is detachably coupled between a pair of side plate sections of the main body.
In paragraph 1, A structural reinforcement member for an underground continuous wall panel connection section, characterized in that the front plate and rear plate of the main plate section are alternately arranged along the depth direction.
In paragraph 1 or 2, A structural reinforcement member for an underground continuous wall panel connection section, characterized by further comprising a reinforcing mesh having a plurality of longitudinal reinforcing bars installed along the depth direction through the joint plate section, some of which are positioned behind the front plate and embedded in the concrete of the subsequent panel, and the remaining portions are positioned in front of the rear plate and embedded in the concrete of the preceding panel.
In paragraph 3, The above reinforcing steel mesh is characterized by further comprising a plurality of transverse reinforcing bars connected in a transverse direction to the plurality of longitudinal reinforcing bars so as to integrate the plurality of longitudinal reinforcing bars, forming a structural reinforcing member for a connecting section of an underground continuous wall panel.
In paragraph 4, A structural reinforcement member for an underground continuous wall panel connection part, characterized in that the above transverse reinforcement is connected to the portion positioned at the rear of the front plate and the portion positioned at the front of the rear plate, respectively, of the above longitudinal reinforcement.
A method for constructing a continuous underground wall in which panels made of reinforced concrete are continuously connected, (a) a step of excavating the ground to form a first excavation section, and then embedding a first reinforcing mesh in which a plurality of transverse reinforcing bars and longitudinal reinforcing bars are connected into the first excavation section, and then installing a panel connection structural reinforcing member described in any one of claims 1 to 5 at each end of the first excavation section, and pouring and hardening concrete in the first excavation section to complete the first panel; (b) a step of excavating the ground next to the first panel to form a second excavation section, and removing the separator plate from the panel connection structural reinforcement to open the inner space of the panel connection structural reinforcement toward the second excavation section; and (c) a step of inserting a second reinforcing mesh, in which multiple transverse reinforcing bars and longitudinal reinforcing bars are connected, into a second excavation section, and then pouring and hardening concrete in the second excavation section; characterized by a method for constructing an underground continuous wall.

Description

Structural Reinforcement for Joints Between Underground Slurry Wall Panels and Method for Constructing Underground Slurry Walls Using the Same The present invention relates to construction technology, and more particularly to a structure and a construction method for reinforcing the connection between a preceding panel and a succeeding panel when constructing a continuous wall that is permanently used as an exterior wall at the bottom of a building. A continuous underground wall refers to a wall intended for permanent use as an exterior wall of the basement upon completion of the building structure, rather than a temporary structure installed for earth retention or waterproofing during foundation work and subsequently removed. Figures 1 and 2 show the structure of a conventional underground continuous wall. Figure 1 is a schematic top view of the area where the underground continuous wall is to be installed. Here, the part marked A is the leading panel section, and the part marked B is the trailing panel section. When constructing the underground continuous wall, the area where the underground outer wall of the building is to be installed is first partitioned so that the leading panel section and the trailing panel section are arranged alternately along the area. Then, excavation is carried out downwards along the preceding panel sections (A1, A2, A3). More specifically, a guide wall (not shown) is installed on the surface, and an excavator is used to excavate the preceding panel sections to a predetermined depth. During this process, to prevent the borehole wall formed by the excavation from collapsing, a stabilizing fluid (generally bentonite) is injected to maintain the borehole wall and fill the excavated section. When the excavation of the preceding panel section is completed, a reinforcing mesh consisting of transverse reinforcing bars (1) and longitudinal reinforcing bars (2) connected to each other is inserted into the excavation section while filled with stabilizing fluid, and concrete is injected into the excavation section using an injection pipe such as a tremie pipe. Since concrete is heavier than stabilizing fluid, the stabilizing fluid is pushed upward and is pumped out for reuse. When the filled concrete hardens, a wall is formed. All preceding panel sections (A1, A2, A3) can be excavated simultaneously or sequentially. When construction of the preceding panel section is completed, excavation and wall formation work is performed on the subsequent panel section (B1, B2, B3) between the preceding panel sections. The process is the same as the construction of the preceding panel section. When construction of the preceding panel section and the subsequent panel section is completed, a continuous wall is completed in the form shown in FIG. 2. In the underground continuous wall structure described above, structural strength between the preceding panel and the succeeding panel is a problem. Since the succeeding concrete is poured after the preceding panel concrete has hardened, it is difficult for the concrete of the preceding panel and the succeeding panel to integrate with each other. While the fundamental problem is that the concrete hardening times of the preceding and succeeding panels differ, there are also construction-related issues. Specifically, the concrete of the preceding panel inevitably has bentonite liquid or soil attached to it that was filled during the construction of the succeeding panel, and even if the excavated section of the succeeding panel is overcut, it is difficult to completely remove the material attached to the preceding concrete. Therefore, integration at the concrete interface (g) between the succeeding panel and the preceding panel is emerging as an important technical issue. Although the structure is reinforced by overlapping the reinforcement mesh of the leading and trailing panels, recently, attempts have been made to solve this by increasing the frictional force at the connection between the leading panel concrete and the trailing panel concrete. Methods such as interposing stud bolts between the leading and trailing panels are being attempted, but it is difficult to expect structural reinforcement sufficient to resist external forces such as earthquakes. FIGS. 1 and 2 are drawings for explaining a conventional underground continuous wall, FIG. 1 is a schematic plan view for explaining the leading panel section and the trailing panel section for constructing the continuous wall, and FIG. 2 is a schematic cross-sectional view after reinforcing bars have been embedded in the leading and trailing panel sections and concrete has been poured. FIG. 3 is a schematic perspective view of a structural reinforcement member for an underground continuous wall panel connection section according to an example of the present invention. Figures 4 and 5 are intended to compare and explain the state in which a structural reinforcement is installed on a preceding panel, and Figure