KR20080109310A - U-type prefabricated retaining wall construction method - Google Patents

U-type prefabricated retaining wall construction method Download PDF

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Publication number
KR20080109310A
KR20080109310A KR1020070057468A KR20070057468A KR20080109310A KR 20080109310 A KR20080109310 A KR 20080109310A KR 1020070057468 A KR1020070057468 A KR 1020070057468A KR 20070057468 A KR20070057468 A KR 20070057468A KR 20080109310 A KR20080109310 A KR 20080109310A
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KR
South Korea
Prior art keywords
wall
stress
point member
retaining wall
stress point
Prior art date
Application number
KR1020070057468A
Other languages
Korean (ko)
Inventor
안창일
Original Assignee
(주)서현컨스텍
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Publication date
Application filed by (주)서현컨스텍 filed Critical (주)서현컨스텍
Priority to KR1020070057468A priority Critical patent/KR20080109310A/en
Publication of KR20080109310A publication Critical patent/KR20080109310A/en

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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
    • E02D29/02—Retaining or protecting walls
    • E02D29/0258—Retaining or protecting walls characterised by constructional features
    • E02D29/0283—Retaining or protecting walls characterised by constructional features of mixed type
    • 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
    • E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
    • 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

Abstract

A construction method of a stress reduction type retaining wall is provided to double the utilization of a stress reduction type retaining wall by securing a working space sufficiently. A construction method of a stress reduction type retaining wall, for constructing a stress reduction type retaining wall(100) in the U-shaped cross section as a whole by forming a stress supporter on the backside of the wall and installing a stress support member between a wall and a base plate, comprises the steps of forming a wall socket connection on the top of two ends, installing a base plate(110) integrally at a certain distance from the wall socket connection, installing an inclined stress support member(130) between the stress supporter and the stress support member at the backside of a wall(120), and installing a horizontal stress support member(140) between two wall stress supporters on the upper part of the inclined stress support member.

Description

U-TYPE PREFABRICATED RETAINING WALL CONSTRUCTION METHOD}

1A and 1B show a U-shaped retaining wall using a conventional U-shaped retaining wall and a stress reducing retaining wall.

Figure 2a and Figure 2b shows an embodiment of the stress reducing retaining wall construction method of the U-shaped cross-section according to the present invention.

3A and 3B illustrate another embodiment of the stress reducing retaining wall construction method of the U-shaped cross section according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: U-shaped cross-section stress reducing retaining wall

110: base plate 120: wall

130: slope stress point member 140: horizontal stress point member

200: soil material 300: ground

The present invention relates to a stress reducing retaining wall construction method of a U-shaped cross section. More specifically, the stress-reducing retaining wall of the U-shaped section is installed in a U-shaped section in which the stress point member is installed horizontally and inclined so that the stress-retaining retaining wall is installed in the U-shaped cross section, and sufficient space for compaction of the fill material is secured therein. It is about.

1A shows a conventional U-shaped retaining wall 10. The retaining wall 10 is composed of a base plate 11 and both walls 12 extending upwardly on both sides of the base plate to compact the landfill material 13 therein, and to form a packaging layer on the top surface of the landfill material. It is constructed.

However, the conventional U-shaped retaining wall 10 has a problem in that there is a limitation in precast products or field construction because the size of the base plate and the thickness of the wall must be increased as the height of both walls increases.

Therefore, the U-shaped retaining wall 20 can be constructed using the stress-retaining retaining wall developed by the applicant, which will be described below with reference to FIG. 1B.

The stress reducing retaining wall 20 is largely composed of a base plate 21 and a wall 22. The stress supporting member A1 is formed on the rear vertical beam 24 of the wall 22, and the stress point member ( 23 is installed to be inclined downward between the stress point member fixing portion A2 formed on the upper surface girder 25 of the base plate 21 and the stress support A1 of the wall 22, so that both retaining walls face each other. It can be seen that it can be used as a conventional U-shaped retaining wall by installing a U-shaped cross section as a whole.

The stress-reducing retaining wall 20 can be installed in stages by using a base plate and a wall so that the construction is easy and the form installation period, concrete casting period, and concrete curing period required for conventional site casting are eliminated. You can expect this shortening effect,

As it is prefabricated concrete product pre-fabricated in workshop or factory, it can reduce the use of formwork of cast-in-place concrete, which can reduce construction cost and ensure the quality of concrete.

The connection between each segment base plate and the wall uses socket connection method and can protrude tension member fixing part on the base plate to resist the uneven settlement of the structure and the horizontal action,

Instead of wall reinforcing bars and reinforced concrete sub-walls used in existing concrete retaining walls, stress point members including strands or rods for introducing prestress into walls and foundation plates, or by using simple connectors as stress point members, When the back surface is subjected to tensile force due to the main earth pressure and the load, the tensile force is canceled by the stress point member so that the internal stress of the structure becomes small, thereby bringing structural stability as well.

It can reduce the use of concrete and reinforcing wall of the retaining wall and the sub-wall of the conventional retaining wall, and reduce the installation cost of the formwork for the conventional sub-wall laying, leading to the reduction of construction cost and improving the constructability as a pre-fabricated tension means.

After construction, since the tension can be introduced and dismantled further, there is a technical feature that enables the reuse of the retaining wall and the repeated use thereof, thereby significantly improving the usability of the retaining wall.

However, since the stress-retaining retaining wall is installed to face each other in the U-shaped retaining wall 20 as described above, when the soil material 30 is covered in its inner space, the space for compaction is narrow, so that the actual workability is very poor. There was a problem,

Since the base plate 21 is not formed integrally with each other, there is a problem that the work to be connected to the construction integrally in the field can be cumbersome.

Therefore, in the present invention, particularly in the construction of a U-shaped retaining wall using a stress-retaining retaining wall, the usability of the stress-retaining retaining wall can be further increased by ensuring a sufficient working space such as to easily fill the soil material therein. Let it be the technical problem.

The present invention to achieve the above technical problem

To form a stress support on the back of the wall, and install the stress point member between the wall and the base plate to reduce the bending moment due to earth pressure acting on the wall. In

Wall socket connecting portion 111 is formed on the upper surface of both ends, and the base plate 110 is formed integrally provided with a plurality of stress point member fixing portion 112 with a predetermined distance from the wall socket connecting portion,

Both wall 120 is installed on the wall socket connecting portion 111, but the inclined stress point member 130 is installed between the stress support on the rear surface of the wall and the stress point member fixing part,

U-shape to install a horizontal stress point member 140 between both the stress support member on the top of the inclined stress point member 130 in addition to covering the ground material 200 including the earth and sand inside the base plate and the wall; To provide a stress reducing retaining wall construction method of the cross section.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

2A, 2B and 3A and 3B show examples of the stress reducing retaining wall 100 of the U-shaped cross section of the present invention.

First, as shown in FIG. 2A, the ground 300 is cut and laid so that the stress-reducing retaining wall 100 having a U-shaped cross section can be constructed.

That is, the construction of the stop surface 310 may be preceded so that the foundation plate 110 of the stress-reducing retaining wall 100 having a U-shaped cross section may be preceded first, and then the wall 120 may be the foundation plate 110. In order to be built on both sides, the stop work such as digging is carried out so that a sufficient working space for carrying equipment such as a crane can be secured.

The base plate 110 is installed so as to be supported and placed on the upper surface of the stop surface 310, the base plate 110 is a precast product in advance in the factory to be made in a predetermined standard and brought into the field and connected in the longitudinal direction It is constructed along the way.

The base plate 110 is formed in the concave groove protruding on the upper surface of both ends is formed extending wall socket connection portion 111 in the longitudinal direction,

Between the central portion of the wall socket connecting portion 111, a protruding upper side girder 113 is formed, and the upper side groove 113 has a stress point member as a trapezoidal protrusion spaced apart from the wall socket connecting portion 111 at a predetermined interval. Using the fixing part 112 is formed,

The one having a predetermined width (D) is integrally used so that it does not need to be connected separately to the road width.

Next, the wall 120 is installed to extend upward and upright to the wall socket connection portion 111 of the base plate 110.

The wall 120 is manufactured in the form of a plate, and is also installed in the base plate 110 while connecting a plurality of longitudinally in the precast product.

That is, the wall 120 is constructed on the base plate 110 in such a manner that the lower end of the wall 120 is inserted into the wall socket connection part 111.

At this time, the rear vertical portion 122 is formed to protrude over the height of the wall at the central portion of the rear surface of the wall 120, the stress support 121 is formed below the rear vertical portion. The stress support 121 is also formed as a trapezoidal protrusion like the stress point member fixing portion 112.

Next, the inclined stress point member 130 is constructed between the stress support 121 of the wall 120 and the stress point member fixing part 112 of the base plate 110.

The inclined stress point member 130 may be structurally installed in the form of a tension member such as a PC strand or steel rod,

It may simply be installed as a support member including a connecting rod.

For example, in the case of installing the PC strand or steel rods, a conventional fixing device and a fixing device may be installed in the stress support 121 and the stress point member fixing part 112 so that the tension or fixation of the PC strand or steel rod can be fixed. The protective tube may be covered so as not to be corroded by the fill material (200).

Furthermore, in the case of the connecting rod, since tension and fixing work are not necessary, both ends of the connecting rod may be fixed to the stress support 121 and the stress point member fixing part 112.

As a result, it can be seen that the retaining wall can be constructed as a U-shaped retaining wall as a whole by the base plate 110 and the two walls 120 described above.

However, as the space occupied by the inclined stress point member 130 increases, the following work space such as compacting the fill material 200 covered in the retaining wall may be very limited.

Accordingly, in the present invention, in installing the inclined stress point member 130 installed between the stress support 121 and the stress point member fixing part 112 of the wall 120, the compacting equipment and the like are carried in the center of the whole retaining wall. The formation space is optimized to secure enough space for operation.

This results in the downward position of the formation of the stress support 121 of the wall 120 so that the position of the stress point member fixing portion 112 is also close to the wall socket connection portion 111 of the base plate 110. In this case, the inclined stress point member 130 may be installed in close contact with the inner edge of the U-shaped retaining wall.

Referring to FIG. 2A, it can be seen that the arrangement height H2 of the stress support 121 of the wall 120 is smaller than the height of the stress support H1 of the conventional wall in comparison with FIG. 1B. It can be seen that the arrangement distance D2 of the wall socket connecting portion 111 of the base plate 110 is also formed smaller than the stress support height D1 of the conventional base plate.

As a result, the soil cover 200 is firstly covered in accordance with the height of the wall to be stable to the earth pressure acting by the inclined stress point member 130 adjusted by the arrangement, and then compacted using the compaction equipment.

At this time, the inclined stress point member 130 is adjusted by the arrangement can not resist the earth pressure corresponding to the final retaining wall height (H) in the present invention so that the inclined stress point member 130 to resist such earth pressure. The horizontal stress point member 140 is installed between the stress support 121 formed in the upper wall (120). Since this work can be installed on the top of the covered soil 200, the workability can be improved.

The horizontal stress point member 140 may also be structurally installed in the form of a tension member such as a PC strand or a steel rod like the inclined stress point member 130, and may be simply installed as a supporting member including a connecting rod.

That is, when installing with PC strands or steel rods, the usual fixing device and fixing device is installed on the stress support 121 of both walls 120 so that the tension or fixation of the PC strands or steel rods, PC strands or steel rods After tensioning both ends, the fixing device and the fixing device can be mounted.

Furthermore, in the case of the connecting rod, tension and fixing work are not necessary, so both ends of the connecting rod may be fixed to the stress support 121.

As a result, both walls 120 may prevent the phenomenon of spreading to both sides by the cover material 200 additionally covered by the horizontal stress point member 140, while the walls 120 may be covered by soil 300 to be described later. Resistance to earth pressure acting on) can be enhanced.

Next, the ground 300 is covered on both sides of both walls 120. The earth pressure acting as the wall 120 by the ground 300 covers the earth pressure which causes the wall to be retracted. In the present invention, the earth pressure can be made to be resisted by the horizontal stress point member 130. .

Next, a pavement layer is formed on the top surface of the fill material 200, and a vehicle or the like can be passed to the top of the pavement layer.

FIG. 2B is a view of applying the inclined stress point member and the horizontal stress point member of the present invention to another example of the stress reducing retaining wall in FIG.

That is, in the case of the base plate 110 of the retaining wall,

It is the same that the wall socket connecting portion 111 extends in the longitudinal direction in the form of a concave groove protruding from the upper surface of both ends,

As a trapezoidal protrusion, the stress point member fixing part 112 is formed to be spaced inward in the longitudinal direction in the same manner as the wall socket connection part 111.

The base plate 110 is also used to have a predetermined width (D) integrally so as not to be connected separately to the road width.

In addition, the wall 120 is installed to extend upright to the wall socket connection portion 111 of the base plate 110,

The wall 120 is also manufactured in the form of a plate, and is also installed in the base plate 110 while connecting a plurality of longitudinally in the precast product.

At this time, the back surface of the wall 120 is formed with a stress support 121 is formed to protrude in the longitudinal direction at a predetermined interval up and down the wall back surface. At this time, the stress support 121 is also formed as a trapezoidal protrusion like the stress point member fixing portion 112.

It can be seen that the inclined stress point member 130 is inclined between the stress point member fixing part 112 of the base plate 110 and the stress support 121 of the wall 120,

Horizontal stress point member 140 is also installed between the stress support 121 on the inclined stress point member 130, it can be seen that the fill material is covered and compacted inside the retaining wall.

3A and 3B show that in particular in the retaining wall of FIGS. 2A and 2B, at least two horizontal stress point members 140 may be installed between the walls 120, ie, depending on the wall height of the retaining wall. The interval and the number of installation can be changed by the enemy, which can be seen that the enemy can be installed against the generated earth pressure.

The U-shaped retaining wall of the present invention can be easily secured by using a stress-retaining retaining wall, but it is possible to secure a work space such as compacting the cover material covered therein, thereby effectively improving the usability of the stress-retaining retaining wall. Will be.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (2)

In forming the stress support on the back surface of the wall, and installing the stress point member between the wall and the base plate to reduce the bending moment due to the earth pressure acting on the wall, the overall stress relief retaining wall is U-shaped in cross section. Wall socket connection parts are formed on the upper surfaces of both ends, and the base plate is formed integrally provided with a plurality of stress point member fixing parts at regular intervals from the wall socket connection parts. Both wall parts are installed at the wall socket connection part, and an inclined stress point member is installed between the stress support on the rear surface of the wall and the stress point member fixing part. Stress-retaining retaining wall having a U-shaped cross section including covering the foundation plate and a fill material including earth and sand, and installing a horizontal stress point member between both wall stress supports above the inclined stress point member. Construction method. The stress reducing retaining wall construction method according to claim 1, wherein the inclined stress point member or the horizontal stress point member is installed as a tension member including a PC stranded wire or a steel rod, or a support member including a connecting rod. .
KR1020070057468A 2007-06-12 2007-06-12 U-type prefabricated retaining wall construction method KR20080109310A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101159097B1 (en) * 2012-03-28 2012-06-25 (주)서현컨스텍 Precast abutment for longitudinal continuous connection and construction method therefor
CN113373973A (en) * 2021-01-13 2021-09-10 贵州智华建设工程有限责任公司 U type groove cutting integrated configuration retaining wall

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101159097B1 (en) * 2012-03-28 2012-06-25 (주)서현컨스텍 Precast abutment for longitudinal continuous connection and construction method therefor
CN113373973A (en) * 2021-01-13 2021-09-10 贵州智华建设工程有限责任公司 U type groove cutting integrated configuration retaining wall

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