WO2009072816A1

WO2009072816A1 - Dry construction method of boundary stone

Info

Publication number: WO2009072816A1
Application number: PCT/KR2008/007160
Authority: WO
Inventors: Sin Oh Hwang; Hyun Oh Hwang; Jong Eob Lee
Original assignee: Sin Oh Hwang; Hyun Oh Hwang; Jong Eob Lee
Priority date: 2007-12-05
Filing date: 2008-12-04
Publication date: 2009-06-11

Abstract

Disclosed is a dry construction method of boundary stones, which requires a short construction time and a low manpower. In the dry construction method, gutter concrete is cast by a direct casting method, the boundary stones are placed on the gutter concrete, and a level alignment and a linearity alignment of the boundary stones are performed. Therefore, the dry construction method has a high construction speed and thus reduces necessary expenses, thereby having a high economic efficiency.

Description

Description DRY CONSTRUCTION METHOD OF BOUNDARY STONE

Technical Field

[1] The present invention relates to a construction method of boundary stones, and more particularly to a dry construction method of boundary stones installed to divide a footway and a roadway or footways from each other. Background Art

[2] In general, boundary stones to prevent a vehicle in motion from entering onto a footway due to driver's carelessness are installed at a boundary between a roadway where vehicles run and the footway where pedestrians walk.

[3] The boundary stones are installed on a base layer made of a stone mixture along a boundary between a roadway and a footway so as to divide the roadway and the footway from each other. The boundary stones are made of natural stone, such as granite, or artificial stone, such as concrete, which is compressed by a press and cured.

[4] The boundary stones are constructed by casting concrete, and are generally completed by the following process. In a conventional wet construction method of boundary stones, base concrete is cast into a pair of first concrete forms and is partially dewatered, and the boundary stones are located and arranged at a designated height of the first concrete forms. Thereafter, when the base concrete is cured to a certain degree, second concrete forms are installed at a region separated from the base concrete toward a roadway by a designated interval, L-shaped gutter concrete (for fixing the boundary stones) is cast between the concrete forms. When the curing of the L-shaped gutter concrete has been completed, the first and second concrete forms are removed. Thereby, the construction of the boundary stones is completed.

[5] However, the above conventional wet construction method of boundary stones has several problems, as follows. That is, since the base concrete to support the boundary stones to a designated height is separately cast in addition to the concrete to substantially fix the boundary stones, and the boundary stones are arranged on the base concrete after the curing of the base concrete to a certain degree, the conventional wet construction method requires excessive time and manpower to install the boundary stones. Disclosure of Invention

Technical Problem

[6] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a dry construction method of boundary stones, which requires a short construction time and a low manpower. Technical Solution

[7] In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of a dry construction method of boundary stones, in which gutter concrete is cast by a direct casting method, the boundary stones are placed on the gutter concrete, and a level alignment and a linearity alignment of the boundary stones are performed.

[8] The gutter concrete may include a depressed groove having a width larger than the width of the boundary stones such that the boundary stones can be placed on the upper surface of the depressed groove; and the margin in the width of the depressed groove may be filled with mortar.

[9] The level alignment and the linearity alignment of the boundary stones may be performed by a compactor.

[10] Further, the gutter concrete may include a depressed groove having a width larger than the width of the boundary stones such that the boundary stones can be placed on the upper surface of the depressed groove; and an extra amount of concrete enough to fill the margin in the width of the depressed groove may be further provided at both tips of the depressed groove when the gutter concrete is cast.

[11] The gutter concrete may have a slump of 30~60mm.

[12] The boundary stones may be made of natural granite or artificial granite.

Advantageous Effects

[13] In the dry construction method of the present invention, the boundary stones are installed just after the gutter concrete is installed by a direct casting method not requiring a concrete form. Therefore, the dry construction method has a high construction speed and thus reduces necessary expenses, thereby having a high economic efficiency. Brief Description of Drawings

[14] FIG. 1 is a flow chart illustrating a dry construction method of boundary stones in accordance with one embodiment of the present invention;

[15] FIGS. 2 to 6 are views sequentially illustrating a process of the dry construction method in accordance with one embodiment of the present invention;

[16] FIG. 7 is a flow chart illustrating a dry construction method of boundary stones in accordance with another embodiment of the present invention;

[17] FIGS. 8 and 9 are views illustrating a process in the dry construction method in accordance with another embodiment of the present invention;

[18] FIG. 10 is a view illustrating a front compacting plate and a rear compacting plate of a compactor used in the dry construction method in accordance with another embodiment of the present invention; and [19] FIG. 11 is a view illustrating the front and rear compacting plates of FIG. 10 in use.

Best Mode for Carrying out the Invention

[20] Reference will now be made in detail to the embodiments of the present invention, an example of which is illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below to explain the present invention by referring to the annexed drawings.

[21] FIG. 1 is a flow chart illustrating a dry construction method of boundary stones in accordance with one embodiment of the present invention, and FIGS. 2 to 6 are views sequentially illustrating a process of the dry construction method in accordance with one embodiment of the present invention.

[22] First, in order to construct boundary stones, a base layer 1 is formed (operation

SlOO). The formation of the base layer 1 is a process of compacting the ground, and is generally carried out when a building is constructed. Thus, the detailed description of the formation of the base layer 1 will be omitted.

[23] Thereafter, as shown in FIG. 2, a gutter 10 is installed by casting concrete (operation

S200). Here, a direct casting method, in which concrete is directly cast without a concrete form, is used. In this method, a concrete construction machine placer for direct casting, which is generally used in a work site, may be employed, or a vibrator, which is assembled at a work site, may be employed using a concrete form for direct casting, which is manufactured.

[24] Generally, concrete standards are represented by a coarse aggregate maximum size

(mm), a concrete strength (MPa), and a slump (mm). The higher the slump is, the lower the consistency of concrete is, and the lower the slump is, the higher the consistency of concrete is. For example, concrete, which is used in the construction of a general building, has a coarse aggregate maximum size of 25mm, a concrete strength of 18~24MPa, and a slump of 80~150mm. Concrete, which is used in the installation of the gutter 10 of the present invention, generally has the same concrete strength as that of concrete, which is generally used, but exemplarily has a slump of 30~60mm. In case that concrete having the above slump standard is used, the consistency of concrete is proper and a dewatering time is not separately required, and thus a next process can be continuously carried out. In case that concrete is deviated from the above the range, when boundary stones 20 are placed on the gutter 10, the gutter 10 is partially sunk or broken. Other standards, i.e., the coarse aggregate maximum size and the concrete strength, except for the slump, are slightly varied according to season and water content percentage of aggregate, and thus are not designated as special values but have same values as those in a general construction method.

[25] A depressed groove 12, in which the boundary stones 20 are placed, is provided at one side of the upper surface of the gutter 10. The depressed groove 12 has a width, which is slightly broader than the width of the boundary stones 20.

[26] Thereafter, as shown in FIG. 3, the boundary stones 20 are placed (operation S300).

The boundary stones 20 placed on the gutter 10 are made of natural granite or artificial granite. Boundary stones may be produced by compressing concrete with a press and then curing the compressed concrete. However, the boundary stones made of concrete are weak to an impact, and thus are not suitable for serving as road boundary stones, to which impacts are continuously applied, from the viewpoint of appearance and life span.

[27] As shown in FIGS. 4 and 5, when the boundary stones 20 are placed in the depressed groove 12 of the gutter 10, linearity and level alignments are carried out (operation S400). The linearity alignment means an alignment of the boundary stones 20 in the longitudinal direction, and the level alignment means an alignment of heights of the boundary stones 20. The boundary stones 20 are precisely constructed with a linearity deviation of approximately 2~10mm and a level deviation of approximately 2-5 mm using threads.

[28] Thereafter, mortar 30 is applied between the depressed groove 12 and the boundary stones 20 to fix the boundary stones 20 (operation S500). The operation S500 may be exchanged with the operation S300. For example, the mortar 30 may be poured onto the depressed groove 12 and then the boundary stones 20 may be placed on the depressed groove 12 provided with the mortar 30. In this case, the boundary stones 20 need to be placed on the depressed groove 12 before the mortar 30 is cured.

[29] When the above process is completed, the boundary stones 20 are constructed, as shown in FIG. 6. This dry construction method of boundary stones highly reduces a time to install and cure a gutter, compared with the conventional wet construction method of boundary stones, and thus has a high economic efficiency.

[30] FIG. 7 is a flow chart illustrating a dry construction method of boundary stones in accordance with another embodiment of the present invention. Now, a part of the construction and operation of this embodiment, which substantially differ from those of the earlier embodiment, will be described preponderantly.

[31] First, in the dry construction method of boundary stones of this embodiment, as shown in FIGS. 4 A and 4B, an amount of concrete enough to fill a margin of a depressed groove 12, which is provided to have a width being slightly larger than the width of boundary stones 12, is further cast at both tips 14 and 16 of the depressed groove 12 (operation S200'). That is, in the earlier embodiment, the margin of the depressed groove 12 is filled with mortar, but, in this embodiment, the margin of the depressed groove 12 is filled with an extra amount of concrete. This method omits the pouring of mortar, and thus is more efficient in managing working time and expense. [32] Second, in the dry construction method of boundary stones of this embodiment, when the boundary stones 20 are placed after the gutter 10 is installed, a high vibration compactor simultaneously aligns and compacts the boundary stones 20 and the gutter 10, and thus fills the margin of the depressed groove 12 with the extra concrete (operation S400').

[33] FIGS. 10 and 11 illustrate compacting plates of the high vibration compactor used in the dry construction method of boundary stones in accordance with the present invention. The high vibration compactor includes a main body (not shown) having a driving source and a vibrating unit, and a front compacting plate 42 and a rear compacting plate 46 installed on the main body. The high vibration compactor moves in the longitudinal direction of the boundary stones 20, and performs linearity and level alignments of the boundary stones and fills the margin (gap) of the depressed groove 12 simultaneously. As shown in FIG. 11, the front compacting plate 42 aligns front surfaces 20a and upper surfaces 20c of the boundary stones 20, and applies vibration (Q) in the direction of the arrow, thus filling one side margin of the depressed groove 12 with the extra concrete at the tip 16 of the depressed groove 12. The rear compacting plate 46 presses the rear surface of the gutter 10, and applies vibration (Q) in the direction of the arrow, thus filling the other side margin of the depressed groove 12 with the extra concrete at the tip 14 of the depressed groove 12 without the deformation of the external appearance of the gutter 10.

[34] Ends of the compacting plates 42 and 46 are formed in a curved line such that the compactor can smoothly move. The front portion of the gutter 10 at the front surfaces 20a of the boundary stones 20 maintains the initial tilt angle during the compacting and filling operation. The reason is that when the tilt angle is increased, water is gathered and is not effectively drained.

[35] The above compacting and filling operation needs to be carried out within 30 minutes after the installation of the gutter 10, and be completed prior to the beginning of concrete curing. Industrial Applicability

[36] As apparent from the above description, in the dry construction method of the present invention, the boundary stones are installed just after the gutter concrete is installed by a direct casting method not requiring a concrete form. Therefore, the dry construction method has a high construction speed and thus reduces necessary expenses, thereby having a high economic efficiency.

[37] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

[1] A dry construction method of boundary stones, in which gutter concrete is cast by a direct casting method, the boundary stones are placed on the gutter concrete, and a level alignment and a linearity alignment of the boundary stones are performed. [2] The dry construction method according to claim 1, wherein: the gutter concrete includes a depressed groove having a width larger than the width of the boundary stones such that the boundary stones can be placed on the upper surface of the depressed groove; and the margin in the width of the depressed groove is filled with mortar. [3] The dry construction method according to claim 1, wherein the level alignment and the linearity alignment of the boundary stones are performed by a compactor. [4] The dry construction method according to claim 1 or 3, wherein: the gutter concrete includes a depressed groove having a width larger than the width of the boundary stones such that the boundary stones can be placed on the upper surface of the depressed groove; and an extra amount of concrete enough to fill the margin in the width of the depressed groove is further provided at both tips of the depressed groove when the gutter concrete is cast. [5] The dry construction method according to claim 1, wherein the gutter concrete has a slump of 30~60mm. [6] The dry construction method according to claim 1 or 2, wherein the boundary stones are made of natural granite or artificial granite.