KR20220011604A - Double pile self-reliance retaining wall construction method - Google Patents

Abstract

The present invention relates to a retaining wall construction method forming an earth wall by engaging earth plates (30) between a large number of piles inserted into the ground. Piles composing the earth wall are aligned in two rows of front row piles (11) and rear row piles (12), and bind the front row piles (11) and the rear row piles (12) with each other to rely on themselves. A wale (20), which is a horizontal member coming in contact with a front surface of the front row piles (11), is bound with a front unit of the rear row piles (12) by a binding rod (60). A front fixing plate (50) and a rear fixing plate (40) are respectively mounted on a front end unit and a rear end unit of the binding rod (60) so that the binding rod (60) with tension granted can firmly support the wale (20). According to the present invention, the support force and self-reliance of a retaining wall structure can be innovatively improved, the construction convenience and space usability can be improved, and at the same time the required materials and construction cost can be reduced.

Description

DOUBLE PILE SELF-RELIANCE RETAINING WALL CONSTRUCTION METHOD

The present invention relates to a retaining method in which an earth plate 30 is coupled between a plurality of piles penetrated into the ground to form an earth wall, and the piles constituting the earth wall are spaced apart from each other. Consisting of rows and binding them to each other to become independent, the wale 20, which is a horizontal material that is in close contact with the front of the front heat pile 11, and the front part of the rear heat pile 12, are bound with a binding rod 60, and the binding rod 60 By mounting the front fixing plate 50 and the rear fixing plate 40 to the front and rear ends, respectively, the binding rod 60 to which tension is applied can firmly support the wale 20.

Retaining facilities, which are essential in the construction of foundation works of various structures, sections of roads and railroads, steep slope sections of the fill section, or various underground facilities, are composed of earth walls that resist the earth pressure of the ground behind and reinforcing structures that support them. do.

Reinforcement of the earth wall includes not only measures to increase the structural rigidity of the wall itself, but also the support that reverses the conduction and movement of the earth wall due to the back earth pressure. Considering this, it can be said that the emphasis is placed on earth pressure support, wall overturning, and movement suppression of the reinforcing structure.

Various methods such as building a support body in front of the wall or binding the wall with an anchor body buried in the ground on the back can be applied alone or in parallel to reinforce the back earth pressure of the earth wall. There is a risk of encroaching on the space of the cut hole in front of the earth wall to be used, and in the case of the back ground buried anchor, the effect of the ground characteristics is large, and there is a problem that a considerable cost is required.

Accordingly, efforts have been made to omit or minimize the reinforcing structures described above by securing the independence of the earth wall itself as much as possible.

The conventional self-supporting earth wall, including Patent No. 1631035, mainly installs two rows of piles and connects these piles to each other to act as a single wall, and at the same time, the pile on the back ground side serves as a kind of anchor. In addition to being superior in independence compared to earth walls, the construction of reinforcing structures such as front support holes or buried anchors can also be significantly simplified.

However, the conventional self-supporting earth wall, including Patent No. 1631035, is a method in which the rear ground side pile and the front cut-off side pile are simply connected, and in fact, the structural significance is limited to a simple double wall or double row pile combination, and in particular, the It has an inefficient structure in which the horizontal material such as a wale joined to the front side and the pile on the rear side are directly directly connected, and the front and rear piles constituting the double row pile form the same upper end.

That is, the prior art has a structure in which the horizontal member of the front side of the pile at the cut-off side and the pile at the rear side are simply connected with a steel bar, etc., and drilling and welding work for the front horizontal member, which is a steel member, is inevitable. This inevitably leads to considerable difficulties in work and poor construction.

In addition, the prior art has a structure in which the cut-off side pile and the rear side pile have the same top height, and only the excavation is performed for the cut-off side pile front side, and the rear side pile is left in a state where the entire section is buried and is limited as a buried body There was no limit to its function as a wall, only performing a formal function.

Therefore, it was impossible to take any measures to reduce the earth pressure on the earth wall formed by the pile on the excavation side and secure the work space, which resulted in a serious problem in that materials were wasted unnecessarily and work efficiency was lowered.

The present invention was devised in view of the above-described problems, and in the two-row pile self-supporting retaining method, a pile penetration step (S11) of penetrating the heat transfer pile 11 on the plan cut-out side and the rear heat pile 12 on the rear ground side into the ground; , Excavating a part of the soil in the front of the post-heat pile 12 and installing the earth plate 30 on the post-heat pile 12 to form a cut-out on the front side of the post-heat pile 12 to expose the upper section of the heat transfer pile 11 In the front excavation step (S12), a plurality of rear fixing plates 40 spaced apart from above and below are attached to the rear heat pile 12, and the wale 20 is installed in close contact with the front of the heat pile 11, and the wale 20 After installing a pair of front fixing plates 50 spaced apart from each other on the front of the 60) and the front fixing plate 50 enveloping the wale 20, the binding step (S20), excavating the soil in front of the heat transfer pile 11, and installing the earth plate 30 on the heat transfer pile 11 to install the heat transfer pile (11) It is a two-row pile self-supporting retaining method, characterized in that it consists of a main excavation step (S30) of forming a cut-off on the front side.

In addition, in the present invention, the rear fixing plate 40 is a front plate 41 that is in close contact with the front side flange of the rear row pile 12, and a rear plate 42 that is in close contact with the front flange rear surface of the rear row pile 12. and a face plate 43 parallel to the web of the back row pile 12 and joined to the central end of the back row pile 12 of the front plate 41, and a pair of rear fixing plates 40 are planarly post row piles It is a two-row pile self-supporting retaining method, characterized in that it is symmetrically coupled to the axis of the web center line of (12), and a fastening rod 47 is fastened to a pair of face plates 43 of these rear fixing plates 40.

Through the present invention, it is possible to dramatically improve the bearing capacity and independence of the retaining structure, as well as improve construction convenience and space utilization, and reduce the required materials and construction costs.

In particular, in forming the interlocking part in front of the retaining structure, a free working space can be formed not only in front of the heat transfer pile 11 but also in the front of the rear heat pile 12, the heat transfer pile 11 and the wale 20 reinforcement, etc. Not only can a sufficient working space be secured during the construction of the retaining structure, but also a high degree of convenience and precision can be secured in the binding and fixing of the electric heat pile and the wale 20, so that the entire retaining structure can be secured. construction quality and structural stability of

In addition, since the elevation of the upper end of the heat transfer pile 11 can be lowered to a considerable level from the top of the post heat pile 12, the earth pressure of the earth wall constituting the heat transfer pile 11 is reduced and the total earth pressure is reduced to the heat transfer pile 11 and the post heat pile (12) can be shared, and materials required can be reduced, as well as advantages in equipment and manpower mobilization can be obtained. have.

1 is a perspective view of a retaining structure to which the present invention is applied;
Figure 2 is a representative cross-sectional view of the retaining structure to which the present invention is applied;
3 is a plan view of a retaining structure to which the present invention is applied;
4 is a partially cut-away perspective view of the main part of the present invention;
5 is an explanatory diagram of an implementation process of the present invention;
6 is a partially cut perspective view of the main part of the combined embodiment of the present invention;
Figure 7 is an explanatory view of the rear fixing plate installation method of the embodiment of Figure 6;

The detailed configuration and execution process of the present invention will be described with reference to the accompanying drawings.

First, FIGS. 1 to 3 show the entire retaining structure constructed by applying the present invention. As shown in FIG. 1, the retaining structure to which the present invention is applied is a heat transfer pile 11 forming a front earth wall and a rear earth retaining wall. It is composed of a post row pile 12 forming a wale 20, a rear fixing plate 40, a front fixing plate 50 and a binding rod 60, etc. for reinforcing and binding them to each other.

That is, in the present invention, the heat transfer piles 11 and the rear heat piles 12 are simply arranged in two rows, the heat transfer pile 11 and related parts exclusively form an earth wall, and the post heat pile 12 has the entire section in the ground behind it. Instead of penetrating and acting as a buried support, as in FIGS. 1 and 2, the excavation part formed by the front excavation and rear ground support earth plate 30 is also formed on the front side of the upper part of the rear row pile 12, The upper end of the heat transfer pile 11 is formed by descending and spaced apart from the upper end of the post heat pile 12, thereby forming a kind of stepped step cutout.

Therefore, as well as excellent space utilization, as in FIGS. 1 and 3 , the binding between the heat transfer piles 11 and the rear heat piles 12 can also be repeatedly and stably performed over the entire linear retaining structure in a plan view. Therefore, it can be said that structural stability, space security, and construction convenience were achieved at once, and the total earth pressure was shared by the heat transfer pile 11 and the post heat pile 12, and at the same time, the equivalent of the earth pressure at the upper end of the heat transfer pile 11 The part can be relieved, which can greatly improve the stability and efficiency of the overall retaining structure.

In particular, as shown in FIG. 2 , since the upper end of the heat transfer pile 11 is located lower than the rear heat pile 12 , the far-extended steel frame can be applied as the heat transfer pile 11 , so materials can be saved. In addition, it is possible to obtain convenience in construction that can freely perform the installation of various members connecting the wale 20 supporting the heat transfer pile 11 and the post heat pile 12 in a fully exposed state.

In addition, in the present invention, the wale 20 and the rear heat pile 12, which are horizontal steel frames that are in close contact with the front side of the heat pile 11, that are, connect and fix the heat pile 11 and the heat pile 12 to each other. As a means for connecting the front flange of Installation and disassembly are possible.

In particular, as shown in FIGS. 3 and 4, both ends of the binding rod 60 are screwed through the front fixing plate 50 and the rear fixing plate 40, respectively, so that tension can be introduced into the binding rod 60, and , This enables the one-layer reinforced electric heat pile 11 support.

In addition, as in FIGS. 2 and 4, when connecting the wale 20 and the binding rod 60 on the front of the heat transfer pile 11, the front fixing plate 50 that is vertically in close contact with the entire surface of the wale 20. The upper and lower ends of the wale 20 protrude upwards and downwards, respectively, and separate binding rods 60 are fastened to the upper and lower protrusions of the front fixing plate 50, respectively. The binding rod 60 and the front fixing plate 50 formed a structure surrounding the wale 20.

That is, as in FIGS. 2 and 4, a pair of binding rods 60 and the front fixing plate 50 spaced apart up and down surround the top, front, and bottom of the wale 20 while surrounding the wale 20. is firmly bound and supported and at the same time to be pulled to the ground side of the rear, it not only exhibits an excellent support effect, but also does not involve any work such as drilling and welding for the wale 20.

Therefore, the deformation and damage of the wale 20 due to perforation or welding can be fundamentally prevented, which is advantageous in maintaining the structural rigidity of the wale 20, and also facilitates the reuse of materials, and facilitates installation and dismantling operations can be done

In particular, in the prior art, in installing the dajang in front of the electric pile 11, the process of installing the bracket supporting the bottom surface of the wale 20 on the front of the electric pile 11 by welding, etc. is essential. On the other hand, in the present invention, a large number of binding rods 60 and the front fixing plate 50 surrounding the wale 20 can firmly support the wale 20, and large parts such as brackets can be excluded. There are also advantages to be gained.

As shown in FIG. 5, the two-row pile self-supporting retaining method of the present invention is a pile penetration step (S11) of penetrating the heat transfer pile 11 on the plan cut-out side and the rear heat pile 12 on the rear ground side into the ground. is initiated.

The ground penetration of the electric heat pile 11 and the post heat pile 12 can be applied in various ways, such as a method of inserting a steel frame for a pile into a pre-drilled excavation hole or a method of directly typing a steel frame for a pile, and a heat transfer pile (11) The heat piles 12 and the back heat piles 12 may be penetrated separately with a time difference, or they may be penetrated at the same time. A method of intrusion may also be applied.

Thereafter, as in FIG. 5, by excavating a part of the soil in the front of the rear heat pile 12, and installing the earth plate 30 in the back heat pile 12 to form a cutout on the front side of the back heat pile 12, the heat transfer pile 11 As the post-heat front excavation step (S12) of exposing the upper section of .

Then, as in FIGS. 4 and 5, a plurality of rear fixing plates 40 spaced apart from the top and bottom are attached to the rear heat pile 12, and the wale 20 is installed in close contact with the front side of the heat transfer pile 11, After installing a pair of front fixing plates 50 spaced apart from each other on the front surface of the wale 20, the front fixing plate 50 and the rear fixing plate 40 are bound with a binding rod 60, but a pair of spaced apart up and down By performing the binding step (S20) in which the binding rod 60 and the front fixing plate 50 surround the wale 20, the wale 20 is supported and the electric heat pile 11 and the rear heat pile 12 are solid. can be tightly bound.

On the other hand, as described above, the front end of the bundling rod 60 is installed in a manner that surrounds the wale 20 through the front fixing plate 50, so welding or drilling is unnecessary, while the rear fixing plate ( In the case of 40), measures for bonding the rear fixing plate 40 to the post-heat pile 12 are required.

Accordingly, in the present invention, as well as easy and strong binding between the post-heating pile 12 and the post-fixing plate 40, as well as easy operation during disassembly, as well as damage to the post-heating pile 12 body can be prevented in Figure 6 And the back fixing plate 40 as in FIG. 7 was established in the coupled embodiment.

That is, as in FIGS. 6 and 7 , the rear fixing plate 40 is in close contact with the front flange front of the rear row pile 12 , the front plate 41 and the rear side flange of the rear row pile 12 . It is composed of a back plate 42 in close contact with the back plate 42 and a face plate 43 parallel to the web of the rear row pile 12 and joined to the central end of the back row pile 12 of the front plate 41, the rear fixing plate 40 ), by forming the front plate 41 and the rear plate 42 to be spaced apart by the same width as the flange thickness of the post-heat pile 12, the rear heat between the front plate 41 and the rear plate 42 spaced apart from each other The flange end of the pile 12 is to be coupled.

Therefore, in joining the rear fixing plate 40 and the post-heating pile 12, any drilling or welding is not required, and only the simple operation of coupling the rear fixing plate 40 to the rear-heating pile 12 flange ( 40) can be installed.

In addition, as in FIGS. 6 and 7, a pair of rear fixing plates 40 are symmetrically coupled to the web center line of the rear row piles 12 on a planar axis, and these rear fixing plates 40 a pair of facing plates 43 By fastening the fastening rods 47, the tension force of the fastening rods 47 acts between the mutually symmetrical rear fixing plates 40, so that the both rear fixing plates 40 can be more firmly bound, and after Post-heat pile 12 departure of the fixing plate 40 can be firmly suppressed.

In this way, after the binding step (S20) of mutually binding the heat transfer piles 11 and the rear heat piles 12 is completed, the soil in front of the heat piles 11 is excavated and the earth plate 30 is installed on the heat piles 11. By performing the main excavation step (S30) of forming a cut and cut part on the front side of the heat transfer pile 11, the retaining structure as in the right end of FIG. 5 can be completed.

11: electric heat pile
12: back row pile
20: belt
30: earth plate
40: rear fixing plate
41: front panel
42: back plate
43: face plate
47: fastening rod
50: front fixed plate
60: binding rod
S11: Pile penetration step
S12: Post-heat front excavation step
S20: bonding step
S30: Main excavation stage

Claims (2)

In the two-row pile self-supporting retaining method,
A pile penetration step (S11) of penetrating the planned cut-off side electric heat pile 11 and the rear ground side heat pile 12 into the ground;
After excavating a part of the soil in the front of the back heat pile 12 and installing the earth plate 30 on the back heat pile 12 to form a cutout on the front side of the back heat pile 12, the post heat front exposing the upper section of the heat transfer pile 11 excavation step (S12) and;
A plurality of rear fixing plates 40 spaced apart from the top and bottom are attached to the rear heat pile 12 , and the wale 20 is installed in close contact with the front of the heat transfer pile 11 , and a pair of spaced apart from each other on the front of the wale 20 . After installing the front fixing plate 50 of a binding step (S20) to surround the wale 20;
Double heat pile characterized in that it consists of a main excavation step (S30) of excavating the front soil of the heat transfer pile 11 and installing the earth plate 30 on the heat transfer pile 11 to form a cut-out on the front side of the heat transfer pile 11 Freestanding retaining method.
The method according to claim 1,
The rear fixing plate 40 includes a front plate 41 that is in close contact with the front flange of the rear column 12, a rear plate 42 that is in close contact with the rear of the front flange of the rear column 12, and a rear stake 12 ) is parallel to the web of the front plate 41 and is composed of a face plate 43 joined to the central end of the rear row pile 12 of the front plate 41, and a pair of rear fixing plates 40 are planarly on the web center line of the rear row pile 12 The two-row pile self-supporting retaining method, characterized in that coupled symmetrically to the axis, and a fastening rod 47 is fastened to a pair of face plates 43 of these rear fixing plates 40.

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