KR101662036B1 - Precast structure construction method using longtudinal connection concrete - Google Patents

Precast structure construction method using longtudinal connection concrete Download PDF

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Publication number
KR101662036B1
KR101662036B1 KR1020160005712A KR20160005712A KR101662036B1 KR 101662036 B1 KR101662036 B1 KR 101662036B1 KR 1020160005712 A KR1020160005712 A KR 1020160005712A KR 20160005712 A KR20160005712 A KR 20160005712A KR 101662036 B1 KR101662036 B1 KR 101662036B1
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South Korea
Prior art keywords
concrete
arch structure
arch
precast
single arch
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KR1020160005712A
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Korean (ko)
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김용진
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(주)서현컨스텍
김용진
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/16—Shapes
    • E02D2200/1607—Shapes round, e.g. circle
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0007—Production methods using a mold
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The present invention relates to a construction method for a precast arch structure using longitudinal connection concrete, which is to construct a tunnel structure by connecting precast arch structures in the longitudinal direction. According to the present invention, the construction method includes: a step of constructing single arch structures to be adjacent to each other in the longitudinal direction, wherein the single arch structure includes an upper arch unit formed in order for the weight to be reduced as concrete is removed as much as a connection concrete accommodation space (S) formed on both sides; and (b) a step of structurally integrating the single arch structures in the longitudinal direction by filling the connection concrete accommodation space (S) with the connection concrete and continuously placing and curing the concrete on the upper surface of the single arch structure at the thickness (t3).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast arch construction method using longitudinally coupled concrete,

The present invention relates to a method of constructing precast arch structures using longitudinally connected concrete. More particularly, the present invention relates to a method of constructing a precast arch structure using a longitudinally connected concrete for constructing a tunnel structure by interconnecting precast arch structures in the longitudinal direction.

In constructing a conventional arch structure,

As shown in FIG. 1A, a single arch structure 10 having a predetermined width in the longitudinal direction of the tunnel is manufactured from a precast concrete member in a factory, and the single arch structure 10 is transferred to a site, A single arch structure 10 is placed at both ends and a plurality of single arch structures 10 are successively arranged in the longitudinal direction of the tunnel in this manner.

At this time, there is a considerable restriction on the size of the single arch structure 10 in order to fabricate and transfer the single arch structure 10 made of one member in the transverse direction of the tunnel.

This is because as the size of the single arch structure 10 becomes larger, it becomes more difficult to manufacture, transport, and construct.

The conventional method of assembling the single arch structure 10 as a single member and assembling it on site minimizes field work and has the advantage that the tunnel can be constructed quickly. However, the width is small in the transverse direction of the tunnel, But only to small, small tunnels.

FIGS. 1B and 1C illustrate a perspective view and a fixing unit of a tunnel structure constructed by connecting segments manufactured by dividing a single-arch structure according to the related art. In other words, the conventional single arch structure is formed as a segment (segmented arch member), and the arch segment structure is constructed by assembling and connecting in the field, thereby improving the problem of the conventional single arch structure 10.

That is, as shown in FIG. 1B, the first and second segments (11, 12, segmented arch members) are formed in an arcuate shape (arcuate structure) so that the earth pressure, water pressure, traffic load, ), So that the high compressive strength of the concrete can be maximized and an economical section can be designed.

The first and second segments are provided at the lower ends of the base structures 31 and 32, respectively. The first and second segments are fastened to each other by a plurality of mutually adjoining first segments 11, And fixing means for mutually connecting and fixing the base 12 with each other.

For example, the fixing means fixes a plurality of first segments 11 adjacent to each other and fixes a plurality of adjacent second segments 12 to each other.

That is, as shown in FIG. 1C, the fixing unit 50 includes reinforcing rods 51a and 51b (52a and 52b), which are arranged so that a portion of the reinforcing rods 51a and 51b protrudes from the outer peripheral edges of the first and second segments 11 and 12, A separating block 55 seated on the upper surface of the boundary between the first segment 11 and the second segment 12 and a concrete block 53 cured to be embedded in the reinforcing bars 51a and 51b 52a and 52b A waterproofing film 56 applied to the outer surfaces of the concrete 53 and the separating block 55 and a waterproofing protective film 57 on the surface of the waterproofing film 56 .

However, such a conventional segmented arch member has a problem in that the means for assembling and connecting the segments to each other and preventing water leakage are added, which complicates the construction and the quality control is difficult.

Furthermore, as shown in FIG. 1D, there is also disclosed a case where a precast arch structure is manufactured by dividing a plurality of divided arch members into a plurality of longitudinal arches by using the connecting bolts 3a and the nut 3b.

However, the pre-cast arch structures produced in this way were also limited in that they could cause leakage problems if the quality of the connection site could not be controlled.

As a result, it is more advantageous to secure the convenience and economical efficiency in manufacturing the precast member by connecting the single arch structure 10 in the longitudinal direction in the construction of the conventional arch structure as shown in FIG. 1A. However, And thus, the workability is inevitably deteriorated,

In the case of construction using segmented arch members, quality control problems have always been pointed out in connection and construction of segmented arch members.

In addition, when the toe of the precast arch structure (the depth from the surface to the top of the precast arch structure) is more than 1 m, the concentrated load on the precast arch structure is dispersed to be deposited on the precast arch structure, The layer absorbs the deformation amount due to the ductile behavior, and the damage of the upper package layer is not exposed. However,

In the case where the load distribution is not distributed to the precast arch structure, such as when the toe is less than approximately 1 m, the load transmitted from the packing layer is often not dispersed in the divided precast arch structure, The packing layer was often damaged due to uneven sagging.

Accordingly, it is possible to prevent the damage of the upper package layer due to uneven settlement even in the case where the pre-cast arch structure is connected to the single arch structure in the longitudinal direction. In the single arch structure, The present invention provides a method for constructing a precast arch structure using longitudinally connected concrete, which is more economical and structurally advantageous, by using a structure which is made to have a structure that minimizes self weight and is advantageous in load distribution according to load.

In order to achieve the above object,

(a) a single arch structure including an upper arch portion formed so as to be formed as a connected concrete accommodating space S on both sides thereof so that concrete is excluded as much as the connecting concrete accommodating space S and its weight is reduced, ; And (b) continuously integrating the single arch structures in the longitudinal direction by continuously pouring and curing the concave concrete in the space S in the thickness t3 on the upper surface of the upper arch portion while filling the concatenated concrete The present invention provides a method of constructing a precast arch structure using a longitudinally connected concrete to prevent the occurrence of uneven settlement in a longitudinal connecting portion of a single arch structure by forming a connecting concrete on a longitudinal connecting portion of the single arch structure do.

According to the present invention, a precast arch structure can be constructed without using a plurality of divided precast arch structures (segment arch members), thereby solving the problems of quality control of a connection portion, thereby preventing water leakage, Even if the precast arch structure can not be constructed, it is possible to overcome the construction constraint of the precast arch structure.

In addition, since the section of the precast arch structure is minimized, it is possible to solve the problem of transportation and construction due to the weight, and the quality control becomes easier. Therefore, the precast arch structure with greatly improved durability is provided .

FIG. 1A is a construction view of a precast tunnel structure according to a conventional single arch structure,
Figures 1b and 1c are cross-sectional views of a pre-cast tunnel structure and a securing means of a conventional segmented arch member,
FIG. 1D is a view showing a construction of a precast tunnel structure by a segmented arch member using fixing means by a bolt and a nut,
FIGS. 2A and 2B are a perspective view and a sectional view of a precast arch structure using the longitudinally connected concrete of the present invention,
FIGS. 3A and 3B are views showing the construction of a precast arch structure using the longitudinally connected concrete of the present invention,
FIGS. 4A, 4B, 4C, 4D, and 4E are flowcharts of a method of constructing a precast arch structure using the longitudinally connected concrete of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Precast Arch Structures Using Longitudinally Coupled Concrete (100)]

FIGS. 2A and 2B are a perspective view and a cross-sectional thickness diagram of the precast arch structure 100 using the longitudinally connected concrete 120. FIG.

The precast arch structure 100 using the longitudinally coupled concrete comprises a single arch structure 110 and a connecting concrete 120.

First, the single arch structure 110 is installed in advance in the factory as a precast member so that both bottom ends are supported on both base portions 130.

In this single arch structure 110, the two wall portions 111 and the upper arch portion 112 are integrally formed, unlike the conventional segmented arch member.

The two wall portions 111 are formed as vertical wall members having a predetermined height and width, and have a predetermined length in the longitudinal direction.

Next, the upper arch portion 112 is formed in an arch shape between the upper ends of the two wall portions 111, and in particular, in the ceiling portion D, the upper arch portion 112 has a cross section of "ㅗ". That is, it is formed by a cross section of the horizontal plate portion 112a and the central vertical portion 112b.

In the present invention, spaces on both sides of the horizontal plate portion 112a and the central vertical portion 112b are formed as a connection concrete accommodation space S, and concrete is excluded as much as the connection concrete accommodation space S, .

The connecting concrete accommodating space S corresponding to the transverse width of the ceiling portion D is filled with the connecting concrete 120 so that the single arch structure 110 can be longitudinally connected.

The connecting concrete 120 is formed to have a predetermined upper and lower thicknesses while filling the connecting concrete accommodating space S so that the upper arch portions 112 are integrated with each other in a state in which the ceiling side surfaces of the upper arch portion 112 are in contact with each other in the longitudinal direction And the jointed concrete 120 is formed in situ in the site by cast concrete.

As a result, the present invention is capable of structurally integrating a single arch structure 110 in the longitudinal direction while reinforcing the structure by increasing the thickness of the ceiling portion D of the single arch structure 110 by using the concatenated concrete 120 by the cast- As shown in FIG.

As a result, as the thickness of the ceiling portion D of the single arch structure 110 increases, even when the toe is small, it is possible to reinforce the longitudinal connecting portion of the precast arch structure 100 according to the present invention, And it has a technical effect that the construction can be easily carried out especially in a field with low toe.

Further, in the present invention, even when forming the end surface of the upper arch portion 112 with a smaller section thickness t2 based on the initial section thickness t1 of the upper arch portion 112 as shown in FIG. 2B, (T3) greater than the initial section thickness t1 of the upper arch portion 112. [0064] As shown in Fig.

The thickness of the connecting concrete 120 according to the present invention is determined by considering the forming size of the connecting concrete accommodation space S for reducing the weight of the top arch part 112 and the like, It is formed so as to have a thickness t1 or more.

[Production of precast arch structure (100) using longitudinally connected concrete)

FIGS. 3A and 3B illustrate the production of a precast arch structure 100 using longitudinally connected concrete.

It can be seen that the connecting concrete 120 is formed on the upper surface of the single arch structure 110 which is in contact with each other in the longitudinal direction to have a predetermined thickness.

At this time, since the upper surface of the single arch structure 110 and the connection concrete 120 form a new or old concrete joint, the upper surface of the single arch structure 110 should be chipped or rough.

However, since the workability is degraded when it is carried out in the field, the present invention allows the rough protrusions 113 to be formed on the upper surface of the single arch structure 110 in advance.

For this purpose, a lattice-shaped finishing material 114 is installed on a steel formwork (not shown) for a single arch structure 110 as shown in FIG. 3a, and a lattice-shaped finishing material 114 is also disassembled when a steel formwork is demolded, Shaped coarse protrusion 113 is naturally formed. As a result, the horizontal shearing force can be sufficiently secured on the upper surface of the single arch structure 110 and the old and new joint surfaces of the jointed concrete 120.

3B, the shear connection reinforcing bars 116 are formed by the shear connection reinforcing coupler 115 together with the coarse protrusions or separately to improve the composite performance of the upper surface of the single arch structure 110 and the coupling concrete 120 And the shear connection reinforcing bars 116 are embedded in the connecting concrete 120 to ensure the integrity of each other.

In this case, the number, position and shape of the shear connection reinforcing bars 116 are not limited as long as they are the upper surface of the single arch structure 110, but they are exposed in the connection concrete accommodating space S in FIG. 3B.

In this case, considering the drying shrinkage due to the temperature change of the connecting concrete 120, a grid-shaped inner reinforcing bar is disposed as shown in FIG. 3B in order to offset the sectional force due to uneven settlement of the single arch structure 110 It is preferable to form the connecting concrete 120 so that the shear connection reinforcing bars 116 and the inner reinforcing reinforcing reinforcing bars 116a cross each other to improve the composing performance.

[Construction method of precast arch structure using longitudinal connection concrete]

FIGS. 4A, 4B, 4C, 4D and 4E illustrate a flow diagram of a method of constructing a precast arch structure using longitudinally connected concrete.

First, as shown in FIG. 4A, both bases 130 are constructed on the ground.

The two bases 130 are continuously installed in the direction of extension of the precast arch structure in a precast or on-cast concrete structure, and a support groove is formed on the upper surface of the precast arch structure 100, And serves to support the lower ends of the wall portions 111 constituting the structure 110.

When the construction of both the bases 130 is completed, the lower ends of both wall portions of the single arch structure 110, which have been previously manufactured and brought into the site, are supported by the support grooves 131 of the foundation 130, So that the connected concrete accommodating space S is set in communication with the side surface.

In the ceiling portion D of the upper arch portion 112 of the single arch structure 110, the cross section is formed to be "ㅗ", that is, the cross section is formed by the horizontal plate portion 112a and the central vertical portion 112b, It can be seen that the connecting concrete accommodating spaces S are communicated with each other and the upper surface of the upper arch portion 112 in the ceiling portion D is formed with the rough protrusions 113 in the form of a lattice .

Next, as shown in FIG. 4B, the connecting concrete accommodating space S communicated with each other is filled with the connecting concrete 120 in the longitudinal direction by using the dies (not shown) so that the thickness of the ceiling portion D is as shown in FIG. Cast and cured.

At this time, the connection concrete 120 may be installed in the longitudinal direction over the entire upper surface of the single arch structure 110 as shown in FIG. 4C including the ceiling portion D, and considering the construction site and the amount of installation in the ceiling portion D etc. So that it can be divided into various kinds.

Next, when the precast arch structure 100 is completed as shown in FIG. 4D, the embankment 200 and the compaction are performed on the upper part, and the precast arch structure 100 is formed to have a constant thickness of toe.

It can be seen that a packing layer (not shown) is formed on the top surface of the toe sole, and a vehicle or the like is passed through the packing layer and the vehicle load P is transmitted to the top surface of the precast arch structure 100 through the toe (P1), and the uneven settlement is not generated at the connection portion of the single arch structure 110 by the connecting concrete 120, so that the construction can be advantageously applied in a low-toothed section (1 m or more) .

In this case, if the connecting concrete 120 is installed in the longitudinal direction over the entire upper surface of the single arch structure 110 including the ceiling portion D as shown in FIG. 4E, unlike the connecting portion of the single arch structure 110, And the cross section of the single arch structure 110 can be minimized.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a concatenated manner.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Precast arch structure
110: single arch structure
111:
112: upper arch portion
112a:
112b: central vertical portion
113: coarse projection
114: lattice type finish
115: Coupler for connection of shear connection reinforcing bars
116: Shear connection reinforcing bars
120: Connection concrete
130:
131: Support groove
D: Ceiling S: Concrete receiving space

Claims (8)

a single arch structure 110 including an upper arch part 112 formed to have a connecting concrete receiving space S on both sides thereof so that concrete is excluded as much as the connecting concrete receiving space S and its own weight is reduced, A step of mounting the first and second electrodes in contact with each other in the longitudinal direction; And
the connecting concrete 120 is filled in the connecting concrete accommodating space S so that the single arch structure 110 is continuously inserted and cured at the upper surface of the upper arch portion 112 at a thickness t3, Structurally integrating,
The connecting concrete 120 is formed on the upper portion of the longitudinal connecting portion of the single arch structure 110 so that no uneven settlement occurs in the longitudinal connecting portion of the single arch structure,
In the single arch structure of the step (a), the upper surface of the upper arch portion 112 is formed as a single-
A lattice-shaped finishing material 114 is provided in a steel form for a single arch structure 110 and a lattice-shaped finishing material 114 is also disassembled when a steel form is demolded to form a lattice-shaped coarse protrusion 113, A method of constructing a precast arch structure using a longitudinally connected concrete to secure a horizontal shear force on a top surface of a single arch structure (110) and a new and joint surface of a connecting concrete (120). The method according to claim 1,
The single arch structure 110 in the step (a) includes two wall portions 111, which are vertical wall members; And an upper arch portion 112 formed in a shape of an arch between the upper end of the wall portions 111 and having a horizontal plate portion 112a and a central vertical portion 112b,
And a connecting concrete receiving space (S) formed by the upper space of the horizontal plate portion (112a) on both sides thereof is communicated with each other in the longitudinal direction. 3. The method of claim 2,
The thickness t3 of the upper arch part 112 of the step (a) is minimized in consideration of the increase in thickness by the connecting concrete 120 so that the weight of the upper arch part 112 is minimized. A method of constructing precast arch structures using longitudinally connected concrete. delete The method according to claim 1,
In the single arch structure of the step (a), the upper surface of the upper arch part 112 is formed as a single-
The shear connection reinforcing bars 116 are embedded in the connecting concrete 120 so as to enhance the combined performance of the upper surface of the single arch structure 110 and the connecting concrete 120, A method of constructing precast arch structures using longitudinally coupled concrete. The method according to claim 1,
In the step (b), the step (d) may include the step of forming a toe on the precast arch structure 100 by embedding and compaction on the precast arch structure 100, and forming a packing layer on the top of the toe structure When the load P from the packing layer is transferred to the upper surface of the precast arch structure 100 through the toe, a differential settlement occurs at the connecting portion of the single arch structure 110 by the connecting concrete 120 A method of constructing a precast arch structure using longitudinally coupled concrete. 6. The method of claim 5,
The connecting concrete 120 is installed in a lattice-shaped inner reinforcing bar so that the shear connecting reinforcing bars 116 and the inner reinforcing rods 116a are connected to each other to continuously pour and cure the upper surface of the single arch structure 110 at a thickness t3. A Method of Construction of Precast Arch Structures Using Longitudinally Coupled Concrete. The method according to claim 1,
The connecting concrete 120 in the step (a) may be formed as a reinforced concrete, but it may be formed on the ceiling portion D of the single arch structure 110 or on the single arch structure 110, Construction method of structure.


KR1020160005712A 2016-01-18 2016-01-18 Precast structure construction method using longtudinal connection concrete KR101662036B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200065789A (en) 2018-11-30 2020-06-09 가톨릭관동대학교산학협력단 Precast concrete block for arch structure construction and arch structure using the block and its construction method
KR102263318B1 (en) 2021-03-12 2021-06-14 제일피씨텍 주식회사 Arch-type Precast Structure with Improved Assembly Structure and Construction Method Thereof
CN115263356A (en) * 2022-08-25 2022-11-01 重庆交通大学 Tunnel arch prefabricated segment lining structure and construction method thereof

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Publication number Priority date Publication date Assignee Title
KR20010016132A (en) * 2000-11-10 2001-03-05 정석태 Arch-box Type Prefab Culvert
KR20100009802A (en) * 2008-07-21 2010-01-29 강남건영(주) All precast concrete prefabricated water storage tank using precast concrete panel for retaining wall
KR20120037212A (en) * 2010-10-11 2012-04-19 박영대 Excavation tunnel constructing method using vertical side wall and arch celling, and excavation tunnel using vertical side wall and arch celling constructed by this
KR101341105B1 (en) * 2013-01-03 2013-12-13 이호석 Arch-shaped precast structure and construction method of the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010016132A (en) * 2000-11-10 2001-03-05 정석태 Arch-box Type Prefab Culvert
KR20100009802A (en) * 2008-07-21 2010-01-29 강남건영(주) All precast concrete prefabricated water storage tank using precast concrete panel for retaining wall
KR20120037212A (en) * 2010-10-11 2012-04-19 박영대 Excavation tunnel constructing method using vertical side wall and arch celling, and excavation tunnel using vertical side wall and arch celling constructed by this
KR101341105B1 (en) * 2013-01-03 2013-12-13 이호석 Arch-shaped precast structure and construction method of the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200065789A (en) 2018-11-30 2020-06-09 가톨릭관동대학교산학협력단 Precast concrete block for arch structure construction and arch structure using the block and its construction method
KR102263318B1 (en) 2021-03-12 2021-06-14 제일피씨텍 주식회사 Arch-type Precast Structure with Improved Assembly Structure and Construction Method Thereof
CN115263356A (en) * 2022-08-25 2022-11-01 重庆交通大学 Tunnel arch prefabricated segment lining structure and construction method thereof

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