KR100407777B1 - method jointing a surface layer over expansion parts for use in underground roadway structure - Google Patents

Abstract

SUMMARY OF THE INVENTION: The present invention provides a joint construction method of an underground joint structure expansion joint pavement layer that gives elasticity such as expansion joints to the upper asphalt concrete pavement layer.

Composition: This method installs an asphalt concrete pavement layer on the upper surface of the lower slab of the underground car body structure; Among the ascon pavement layers, a dowel bar and a dowel cap, which are coupled to move relative to each other to form a lower slab, are respectively fixed, a joint material filled between the two concrete structures, a silicone caulking material, and a water-expandable index member. Cutting the portion of the asphalt concrete pavement layer where the expansion joint is located to a certain width; Applying an adhesive to the cut portion of the ascon packaging layer; It consists of the process of inserting elastic rubber in the part to which this adhesive agent was apply | coated.

Effect: The elastic rubber inserted between the cut surfaces of the asphalt concrete pavement layer provides elasticity to the asphalt concrete pavement layer, thereby preventing the asphalt concrete pavement from cracking and cutting even when the underground car body structure is stretched.

Description

Method of jointing a surface layer over expansion parts for use in underground roadway structure}

The present invention relates to a joint construction method of the underground joint structure expansion joint pavement layer providing the same flexibility as the expansion joint to the asphalt concrete pavement layer formed on the upper side of the expansion joint body structure.

In general, expansion joints are applied to concrete structures, and the expansion joints maintain the structure in a stable state by absorbing expansion and contraction between structures due to shrinkage caused by drying of the structure itself or changes in ambient temperature.

FIG. 3 illustrates that the expansion joint is applied between the concrete structures 51 and 53 constituting the underground roadway body structure, including a dowel bar 55 and a dowel cap 57. That is, the other end of the darwil bar 55 having one end fixed to the concrete structure 51 is inserted into the other end of the darwil cap 57 formed integrally with the other concrete structure 53, and the other end thereof is mated with the darwil cap 57. As it moves, it absorbs the expansion and contraction of the concrete structures 51 and 53.

In this way, the joint material 59 and the silicon caulking material 61 are symmetrically moved up and down symmetrically between the concrete structures 51 and 53 which are relatively moved on the darwill bar 55 and the darwill cap 57. The concrete structures 51 and 53 are deformed and sealed between them at any interval. In particular, the water-expandable index (63) is filled in the soil side between the concrete structures (51, 53), thereby preventing the moisture contained in the soil penetrates between the concrete structures (51, 53).

The underground roadway to which the expansion joint is applied is formed by the structure main body by the concrete structures 51 and 53 and the asphalt concrete pavement layer 65 installed on the concrete structures 51 and 53.

If the concrete structures 51 and 53 are stretched due to factors such as temperature and environmental changes in the interior and exterior of the structure body in the state where the ascon pavement layer 65 is installed, the darwil bar 55 and the darwill cap 57 ) Absorbs the expansion and contraction of the concrete structures (51, 53) while moving relative.

However, the asphalt concrete pavement layer 65 located above the gap between the concrete structures 51 and 53 is intensively stressed because it is exposed to the movement of the concrete structures 51 and 53 and finally cracks and cuts 67. This leads to the need for repacking at regular intervals.

Due to this hassle, finger type expansion joints are used in the case of bridges, but this is hardly applied in the design and construction of ascon pavement layers of most underground roadways because the construction cost is excessive compared to the cost of repackaging.

The present invention has been made in view of the above points, and at low cost, by giving elasticity to the pavement layer installed on the upper side of the expansion joint of the underground vehicle body structure, the pavement layer on the upper side of the expansion joint even when the underground vehicle body structure The purpose is to provide a joint method of pavement of expansion joint structure of underground roadway structures to prevent cracking and cutting of concrete.

The joint construction method of the underground joint structure expansion joint pavement layer for realizing this object includes a laying step of laying an asphalt concrete pavement layer on the upper surface of the lower slab of the basement body structure; Among these ascon pavement layers, expansion joints are provided, which include a dowel bar and a dowel cap coupled to move relative to each other and fixed to both concrete structures, a joint material filled between both concrete structures, a silicone caulking material, and a water-expandable index member. A cutting step of cutting a portion of the upper asphalt concrete pavement layer between the two concrete structures to a predetermined width; An application step of applying an adhesive to the cut portion of the ascon packaging layer; It consists of the insertion process which inserts and attaches an elastic rubber to the part to which this adhesive agent was apply | coated.

Here, the installation step is preferably further comprises a positioning step of confirming the expansion joint position on the lower slab after the construction of the underground car body structure. This positioning process facilitates the identification of the cutting position of the ascon pavement layer during the cutting process following the laying process.

In the cutting process, it is preferable that the ascon pavement layer is cut to a width which is retracted by the same distance from both sides of the expansion joint to both sides. This width is preferably determined according to the elastic range of the compression-inserted elastic rubber, the adhesive strength of the adhesive, and the moving distance of the concrete structure due to the expansion and contraction.

The coating step includes a cleaning step of removing and removing foreign matter remaining on the cut surface of the asphalt concrete pavement layer and the upper surface of the concrete structure forming the lower slab of the underground driveway body structure. This arrangement process uniformly applies an adhesive to the cut surface to firmly bond the elastic rubber and the packing layer, so that the ascon packing layer and the elastic rubber do not separate when the ascon packing layer is elastically absorbed.

1 is a process diagram illustrating the present invention.

Figure 2 is a cross-sectional view of the underground joint structure expansion joint pavement layer to which the present invention is applied.

Figure 3 is a cross-sectional view of the underground joint structure expansion joint packaging layer according to the prior art.

* Description of the symbols for the main parts of the drawings *

1,3 concrete structure 5: ascon paving layer

7: expansion joint 9: adhesive

11: elastic rubber 13: Darby Bar

15: Willow Cap 17: Caulking

19: water expansion index

Advantages and advantages of the present invention will be more apparent from the following detailed description based on the accompanying drawings.

1 is a process diagram illustrating the present invention, in which an asphalt concrete pavement layer 5 is disposed on an upper surface of both concrete structures 1 and 3 forming a lower slab of an underground vehicle body structure, and a expansion joint 7 is installed. The asphalt concrete pavement layer 5 located between the concrete structures 1 and 3 on both sides is cut, the adhesive 9 is applied to both cutting surfaces of the asphalt concrete pavement layer 5, and the adhesive 9 is applied. The elastic rubber 11 is inserted between the cut surfaces, so that the asphalt concrete pavement layer 5 can be stretched like both concrete structures 1 and 3.

First, after the underground vehicle body structure is completed, a process of completing the underground driveway by installing a packing material on the upper surface of the lower slab is performed. The packaging material used at this time is usually ascon. However, the packaging material is not necessarily limited to this asphalt concrete, but means a material that is packaged on the upper surface of the lower slab of the underground driveway.

This laying step may further include a step of checking the position of the expansion joint (7). This positioning process makes it easy to find the portion where the expansion joint 7 concealed by the ascon packaging layer 5 is located in the ascon packaging layer 5 during the cutting process performed after the laying process.

Following this laying step, a step of cutting the ascon paving layer 5 at the portion where the expansion joint 7 is located to a predetermined width is performed. The asphalt concrete pavement layer 5 cut in this cutting process is an upper portion of the expansion joint 7, that is, an upper portion between both concrete structures 1, 3. These expansion joints 7 are fixed to both concrete structures 1 and 3, respectively, as shown in the prior art and shown in FIG. It comprises a joint material (16), a silicone caulking material (17), and a water-expandable index material (19) filled between (1, 3), each of the components of the expansion joint (7) in the prior art As it works as mentioned, a detailed description thereof will be omitted.

At this time, the cutting width of the asphalt concrete pavement layer 5 is determined by the relative movement distance of the two concrete structures (1,3) by the expansion joint (7), the adhesive force of the adhesive (9), and the elastic force of the elastic rubber (11). In view of the fact that the normal expansion joint is in operation, it is preferable that the expansion joint is spaced about 30 to 50 mm on both sides from the center of the expansion joint 7.

Following this cutting process, the process of apply | coating the adhesive agent 9 to both cut surfaces of the ascon packaging layer 5 advances, It is preferable that this application | coating process further includes a rearranging process. This cleaning process removes and cleans up foreign substances remaining on the cut surface of the asphalt concrete pavement layer 5 and the upper surfaces of both concrete structures 1 and 3 forming the lower slab of the underground driveway body. Can be enabled.

Finally, the insertion process inserts and attaches the elastic rubber 11 between the cut surfaces of the asphalt concrete packaging layer 5 to which the adhesive 9 is applied. In this case, the elastic rubber 11 is inserted in a compressed state so that it can be sufficiently expanded even when the concrete structures 1 and 3 are separated, and it must be sufficiently compressed even when they are close together. Of course.

As described above, the present invention cuts the asphalt concrete layer laid on the upper surface of the concrete structure forming the lower slab among the underground roadway body structures, and installs elastic rubber on the cut surface to absorb the expansion and contraction of the asphalt concrete layer, thereby reducing the cost. The asphalt concrete paving layer can be stretched and stretched like a concrete structure, thereby preventing cracking and cutting of the asphalt concrete paving layer located above the expansion joint.

Claims (4)

A laying step of laying a paving layer on an upper side of the lower slab in the underground roadway body structure; A cutting step of cutting a portion of the upper pavement layer between the two concrete structures on which the expansion joint is located in the paving layer to a width spaced about 30 to 50 mm from both sides of the expansion joint to both sides; An application step of applying an adhesive to the cut portion of the packaging layer; And Joint method of the underground roadway expansion joint packing layer comprising an insertion step of inserting and attaching the elastic rubber in a compressed state to the portion to which the adhesive is applied. delete delete delete