KR102676285B1 - Non-excavation construction structure for constructing a precast structure by minimizing face collapse - Google Patents

Abstract

A trenchless structure for constructing a precast structure to minimize membrane collapse is disclosed. The trenchless structure for constructing a precast structure to minimize collapse according to the present invention is provided with a propulsion base and a reach base at the start and end points, respectively, so that the underground structure is installed, and is 1/2 to 1/2 of the height of the precast culvert to be constructed. A block comprising a precast culvert that is pressed in and excavated with a small press-fitted body corresponding to 1/4, placed on the other end of the small press-fitted body across the starting point and the end point, and press-fitted together with the leading pipe. In a trenchless structure for constructing a precast structure to minimize collapse, a precast culvert is mounted on the other end of the lead pipe, the precast culvert is press-fitted and excavated, and after the precast culvert press-fit is completed, the small press-fit body An injection material is filled between the precast culvert and the small indenter, wherein the small indenter includes a first small indenter and a second small indenter of corresponding shapes and sizes, wherein the first small indenter is injected and a second small indenter is injected. A sieve is connected and press-fitted in parallel with the first small press body, and the leading pipe is a front leading pipe provided in the shape of a hollow rectangular parallelepiped and a rear leading pipe connected to the front leading pipe but having both sides formed in an 'L' shape. It includes a pipe, and a four-sided step is provided at the front leading pipe and the rear leading pipe connection portion, and the precast culvert is seated on the step and press-fitted.

Description

Trenchless structure that constructs precast structures to minimize membrane collapse {NON-EXCAVATION CONSTRUCTION STRUCTURE FOR CONSTRUCTING A PRECAST STRUCTURE BY MINIMIZING FACE COLLAPSE}

The present invention relates to a trenchless structure for constructing a precast structure to minimize membrane collapse. More specifically, when installing a structure in the ground, a structure of a spherical cross-section is press-fitted in a trenchless manner, but the collapse slope angle can be minimized. This invention relates to a trenchless structure that constructs a precast structure to minimize membrane collapse.

Generally, methods of constructing structures in the ground are divided into cut-and-cover and trenchless methods.

Since the 1990s, trenchless construction methods that cause traffic congestion or cut into rivers or embankments have begun to be replaced with trenchless construction methods that minimize the impact of ground traffic due to increased social and environmental opportunity costs. Among these, the trenchless construction method is used when it is necessary to install a sewage culvert, underpass, or tunnel structure by crossing the underside of an existing road or railroad, when it is difficult to move obstacles due to construction, or because of interference with obstacles or obstacles to vehicular traffic, etc. Applies to cases where excavation is not possible.

Conventionally, this type of trenchless method is a steel pipe propulsion method (steel pipe loop method, steel pipe press-in method) in which a number of steel pipes (line pipes) are pressed in by a propulsion device, fixed with concrete, and then excavated at the bottom. This has been mainly used.

This conventional steel pipe propulsion method has resulted in various problems such as inefficient application of the steel pipe cross section, increased structure maintenance costs due to water leakage at the steel pipe connection area, and excessive underground excavation.

However, in order to solve the problems of the conventional steel pipe propulsion method, a trenchless structure method was proposed in which a steel box close to the final object is manufactured and then press-fitted to secure underground space and complete the structure.

However, this conventional trenchless structure construction method had the following problems.

First, when press-fitting a box-shaped indenter, there is a high risk that the size of the membrane will collapse on a large scale due to the formation of a large cross-sectional angle of repose, resulting in significant road surface settlement.

Second, if the cover at the top of the indenter is low, the upper soil layer may be moved by the lower indenter when injecting a large-section indenter, and a direction control device must be operated to ensure linear accuracy when indenting a large-section indenter. However, it is difficult to control the direction of the large-section indenter.

Third, when press-fitting a precast structure, the front end resistance is large, so a large press-fitting driving force is generated, so there is no choice but to increase the driving force.

Fourth, after completion of trenchless press-fitting, reinforcing bars are placed inside the press-fitting body and the structure is completed with cast-in-place concrete. However, blockage of the pour pipe for concrete pouring occurs and the concrete is not filled tightly due to obstacles, creating voids inside the structure. Not only was it difficult to exert the cross-sectional strength of the structure, but there was a problem that economic feasibility was low due to the large number of follow-up processes.

The present invention was developed to solve the problems of the prior art described above. By press-fitting a small indenter first and then press-fitting a large-section indenter guided by the small indenter, collapse of the membrane can be minimized, construction accuracy can be increased, and tip resistance can be improved. It relates to a trenchless structure that constructs a precast structure to minimize membrane collapse, which can minimize collapse and can be constructed with precast to improve constructability and economic efficiency.

The trenchless structure, which constructs a precast structure to minimize collapse according to an embodiment of the present invention to solve the above-mentioned technical problem, is provided with a propulsion base and a reach base at the starting and end points, respectively, so that the underground structure can be installed, and the construction Press-fit and excavate a small press-fitted body corresponding to 1/2 to 1/4 of the height of the precast culvert to be formed, and place a lead pipe on the other end of the small press-fitted body across the starting point and the end point to form the lead pipe. In a trenchless structure for constructing a precast structure to minimize collapse, including a precast culvert that is press-fitted together, a precast culvert is mounted on the other end of the lead pipe, and the precast culvert is press-fitted and excavated, After completing the precast culvert indentation, an injection material is filled between the small indenter and the precast culvert, and the small indenter includes a first small indenter and a second small indenter of corresponding shapes and sizes, A first small indenter is press-fitted, a second small indenter is connected and press-fitted in parallel with the first small indenter, and the leading pipe is connected to a front leading pipe provided in the shape of a hollow rectangular parallelepiped and the front leading pipe on both sides. It includes a rear leading pipe formed in an 'L' shape, and a four-sided step is provided at the connection portion of the front leading pipe and the rear leading pipe, and the precast culvert is seated on the step and press-fitted. .

The small indenter body is characterized in that it includes an indenter body, a reinforcing material provided inside the indenter body to reinforce the indenter body, and a load transfer steel plate connecting the indenter body and the reinforcing material.

Parts of the upper and side surfaces of the hollow rectangular parallelepiped-shaped conduit are mounted inside the reinforcing member spaced apart from the press body and are disposed adjacent to an end of the load transfer steel plate.

The precast culvert is inserted with an end seated on the step portion inside the conduit, and a plurality of precast culverts are connected and press-fitted together with the conduit.

Parts of the upper and side parts of the conduit are inserted into parts of the upper and side parts of the small press body, and the front of the precast culvert is inserted into the inside of the conduit, and the precast culvert is connected to the conduit and the small indenter. It is guided by an indenter and press-fitted to a preset position, and when press-fitting the precast culvert, the tip resistance is reduced compared to press-fitting without the small indenter.

During press-fitting of the lead pipe and the precast culvert, the lower portion and sides of the press-fitting body and a portion of the reinforcing material are cut.

According to the present invention, the risk of large-scale collapse can be minimized and sliding of the upper soil layer can be prevented by press-fitting a small-sized indenter before press-fitting a large-section indenter.

In addition, according to the present invention, linear accuracy is secured by line press-fitting of a small indenter, and the precast culvert and line pipe, which are large-section indenters, are guided and press-fitted into a small indenter with guaranteed linear accuracy, so that the overall structure is linear. Accuracy is improved.

In addition, according to the present invention, the culvert is made of precast, the press-in time can be shortened by press-fitting a small press-fitted body, press-fitting and excavating the precast culvert, and additional works such as cutting steel plates, reinforcing bars, installing formwork, and pouring concrete are performed. Since this is not necessary, the construction period can be dramatically shortened.

In addition, according to the present invention, the waterproofing effect can be increased by blocking the inflow of water flowing into the interior by filling the filler between the small press body and the precast culvert.

1 is a conceptual diagram showing press-fitting a small press-fit body after installing a propulsion base and a reach base according to an embodiment of the present invention;
Figure 2 is a cross-sectional view showing a small press body according to an embodiment of the present invention;
Figure 3 is a conceptual diagram showing a leading pipe mounted on the other end of a small press body according to an embodiment of the present invention;
Figure 4 is a perspective view showing a lead pipe according to an embodiment of the present invention;
Figure 5 is a conceptual diagram showing that a conduit pipe and a precast culvert assembly are press-fitted along a small press-fit body according to an embodiment of the present invention;
Figure 6 is a conceptual diagram showing how a small press body, a conduit, and a precast culvert are mounted according to an embodiment of the present invention;
Figure 7 is a front view showing the small press body, conduit, and precast culvert according to Figure 6 mounted;
Figure 8 is a conceptual diagram showing that the precast culvert according to an embodiment of the present invention is guided by a small indenter and a leading pipe and the indentation is completed;
Figure 9 is a conceptual diagram showing that an injection material is injected between a precast culvert and a small indenter according to an embodiment of the present invention and a part of the small indenter is cut.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts unrelated to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

Hereinafter, a trenchless structure for constructing a precast structure to minimize membrane collapse according to an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 1 is a conceptual diagram showing press-fitting a small indenter after installing a propulsion base and a reach base according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a small indenter according to an embodiment of the present invention, and Figure 3 is a It is a conceptual diagram showing that a leading pipe is mounted on the other end of a small press body according to an embodiment of the present invention, Figure 4 is a perspective view showing a leading pipe according to an embodiment of the present invention, and Figure 5 is an embodiment of the present invention. It is a conceptual diagram showing that a conduit and a precast culvert assembly are press-fitted along a small indenter, and Figure 6 is a conceptual diagram showing that a small indenter, a conduit, and a precast culvert are mounted according to an embodiment of the present invention. 7 is a front view showing a small indenter, a conduit, and a precast culvert according to FIG. 6 are mounted, and FIG. 8 shows a precast culvert according to an embodiment of the present invention guided by a small indenter and a conduit for indentation. It is a conceptual diagram showing completion, and Figure 9 is a conceptual diagram showing that injection material is injected between a precast culvert and a small indenter according to an embodiment of the present invention and a part of the small indenter is cut.

Referring to Figures 1 to 9, the trenchless structure for constructing a precast structure to minimize membrane collapse according to an embodiment of the present invention has a propulsion base (S) and a reach base at the starting and ending points, respectively, so that the underground structure can be installed. (E) is prepared, a small indenter (100) corresponding to 1/2 to 1/4 of the height of the precast culvert (300) to be constructed is press-fitted and excavated, and a small indenter that is press-fitted across the starting and end points The lead pipe 200 is mounted on the other end of (100), the precast culvert 300 is mounted on the other end of the lead pipe 200, the precast culvert 300 is pressed in and excavated, and then the precast culvert ( 300) After completion of indentation, injection material (m) is filled between the small indenter 100 and the precast culvert 300.

Referring to Figure 1, first, a propulsion base (S) and an arrival base (E) are dug at the starting and end points of the location where the underground structure (not shown) is installed so that the target underground structure (not shown) can be installed. For construction, abandoned concrete (C1, C2) is poured on the floor of the propulsion base (S) and the arrival base (E), and sheet piles (S1, S2, E1, E2), H-piles (not shown), earth walls (not shown), prefabricated earth retainers (not shown) are installed to ensure the safety of work.

Although not shown, the propulsion base (S) is equipped with a reaction wall and a hydraulic jack to press fit each structure.

At the place where the underground structure (not shown) is to be installed, the small indenter 100 is press-fitted from the propulsion base (S), taking into account the obstacle 10 and the cover, and the small indenter 100 is pressed in while connected.

Referring to FIG. 2, the small indenters 100 are connected in parallel, and after the first small indenter 110 is injected, the second small indenter 120 is placed at the same height as the first small indenter 110. It is connected to the first small press-fitting body 110 and press-fitted.

The height of each small press body (110, 120) corresponds to 1/2 to 1/4 of the height of the conduit 200 and the precast culvert 300, preferably about 1/3, and The width corresponds to approximately 1/2 of the width of the conduit 200 and the precast culvert 300. That is, the cross-sectional area of each small press body (110, 120) corresponds to about 1/4 to 1/6 of the cross-sectional area of the conduit pipe (200) and the precast culvert (300).

Each small press body (110, 120) includes an press body (111, 121), reinforcing materials (112, 122) provided inside the press body (111, 121) to reinforce the press body (111, 121), It includes load transfer steel plates (113, 123) connecting the press body (111, 121) and the reinforcement (112, 122).

In addition, each small indenter (110, 120) is provided with a ring portion (115, 125) at the end of the connected portion, and a filling space (114, 124) is formed between the reinforcement (112, 122) and the indenter body (111, 121). ) is prepared. Filling material is filled between the filling spaces 114 and 124 as well as the inner surfaces of the small press bodies 110 and 120 and the precast culvert.

Referring to FIG. 2, during press-fitting of the conduit pipe 200 and the precast culvert 300, the side parts 117, 127 and the bottom surface 119 of the press-fit body 111, 121 of each small press-fit body 110, 120. , 129), some (112', 122') of the reinforcements (112, 122) are cut.

That is, when each small press-fitted body (110, 120) is press-fitted, the side parts (117, 127) and the lower surface (119) of the press-fitted body (111, 121) are used to secure the rigidity of each small press-fitted body (110, 120). , 129), some (112', 122') of the reinforcements (112, 122) are installed intact, but after the press-fitting of each small press-fitting body (110, 120) is completed, the lead pipe (200) and the precast culvert ( For the press-fitting of the press-fitting body (300), some of the side surfaces (117, 127) and the lower surfaces (119, 129) of the press-fitting body (111, 121) and some (112', 122') of the reinforcing materials (112, 122) are cut.

Referring to FIG. 3, after the press-fitting of the small press-fitting body 100 is completed, a portion of the upper and side surfaces of the hollow rectangular-shaped conductor pipe 200 are reinforced with the reinforcing materials 112 and 122 spaced apart from the press-fitting body 111 and 121. ) and is placed adjacent to the ends of the load transfer steel plates (113, 123).

The leading pipe 200 includes a front leading pipe 210 provided in the shape of a hollow rectangular parallelepiped, and a rear leading pipe 220 connected to the front leading pipe 210 but having both sides formed in an 'L' shape, A four-sided step 230 is provided at the connection portion of the front conduit 210 and the rear conduit 220, so that the precast culvert 300 can be seated and press-fitted on the step 230.

The leading tube 200 is open at the front and rear, and when press-fitting, the upper part and part of the side of the leading tube 200 are guided and pressed into the inside of the small press-fitting body 100, and a part of the lower part and the side of the leading tube 200 is exposed to the ground and press-fitted.

In the conventional case, in order to press-fit the precast culvert (300) without the small press-fitting body (100), the lead pipe (200) corresponding to the size of the precast culvert (300) is press-fitted together with the precast culvert (300) to drive the press-fit. This occurred quite significantly. However, according to the present invention, each small press-fitted body (110, 120) corresponding to 1/4 to 1/6 of the cross-sectional area of the precast culvert (300) is first press-fitted, and then the lead pipe (200) is press-fitted, thereby dramatically increasing the tip resistance. Press-fitting becomes possible with less driving force.

Referring to FIG. 5, the precast culvert 300 is inserted with its end seated on the step 230 inside the conduit 200, and a plurality of precast culverts 300 are connected to form the conduit 200. is press-fitted together with

In the conventional case, the culvert is completed by placing reinforcing bars on the inside of the press-in body and pouring concrete after the press-fitting body is completed, and the structure is damaged because the concrete is not filled tightly due to blockage of the poured pipe or obstacles such as internal rebar and reinforcement. Although there was a problem that the cross-sectional force was not sufficiently exerted, the precast culvert 300 according to the present invention is a factory-made culvert, so it is of excellent quality and can realize early strength of the structure, shortening the construction period.

Parts of the upper and side parts of the conduit 200 are inserted into parts of the upper and side parts of the small press body 100, and the front of the precast culvert 300 is inserted into the inside of the conduit 200 to form a precast culvert. (300) is guided by the leading pipe 200 and the small indenter 100 and is press-fitted to a preset position, and when press-fitting the precast culvert 300, the tip resistance is lower than when press-fitted without the small indenter 100. It decreases.

The precast culvert 300 may be press-fitted by being connected to the segment to be press-fitted after press-fitting each segment.

When press-fitting the lead pipe 200 and the precast culvert 300, part of the side (117, 127) and bottom surface (119, 129) of the press-fitting body (111, 121), and part (112') of the reinforcement (112, 122) , 122') is cut, and the internal excavated soil is taken out to the ground.

As shown in FIG. 8, after the press-fitting of the precast culvert 300 is completed, a filler (m) such as mortar is filled between the small press-fitting body 100 and the precast culvert 300, and thus the precast culvert 300 and the small The connection of the press body 100 is completed.

According to the present invention, the risk of large-scale collapse can be minimized and sliding of the upper soil layer can be prevented by press-fitting a small-sized indenter before press-fitting a large-section indenter.

In addition, according to the present invention, linear accuracy is secured by line press-fitting of a small indenter, and the precast culvert and line pipe, which are large-section indenters, are guided and press-fitted into a small indenter with guaranteed linear accuracy, so that the overall structure is linear. Accuracy is improved.

In addition, according to the present invention, the culvert is made of precast, the press-in time can be shortened by press-fitting a small press-fitted body, press-fitting and excavating the precast culvert, and additional works such as cutting steel plates, reinforcing bars, installing formwork, and pouring concrete are performed. Since this is not necessary, the construction period can be dramatically shortened.

In addition, according to the present invention, the waterproofing effect can be increased by blocking the inflow of water flowing into the interior by filling the filler between the small press body and the precast culvert.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as single may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

S: Propulsion base
E: Reach base
100: Small diameter press body
200: Seondo-gwan
300: Precast culvert

Claims (6)

A propulsion base and a reach base are provided at the start and end points to install the underground structure, and a small indentation body corresponding to 1/2 to 1/4 of the height of the precast culvert to be constructed is pressed in and excavated, and the start and end points are installed. In a trenchless structure for constructing a precast structure to minimize membrane collapse including a precast culvert that is press-fitted together with the lead pipe by mounting a lead pipe on the other end of the small press-fitted body,
Mounting a precast culvert on the other end of the conduit, press-fitting and excavating the precast culvert, and filling injection material between the small press-fit body and the precast culvert after completing press-fitting of the precast culvert,
The small indenter includes a first small indenter and a second small indenter of corresponding shapes and sizes, wherein the first small indenter is injected and the second small indenter is connected in parallel with the first small indenter. and is press-fitted,
The leading pipe includes a front leading pipe provided in the shape of a hollow rectangular parallelepiped, and a rear leading pipe connected to the front leading pipe and having both sides formed in an 'L' shape, and a connection portion between the front leading pipe and the rear leading pipe. A trenchless structure for constructing a precast structure to minimize membrane collapse, wherein a step on four sides is provided, and the precast culvert is seated on the step and press-fitted. According to paragraph 1,
The small press body,
A precast structure to minimize membrane collapse comprising an indenter body, a reinforcing material provided inside the indenter body to reinforce the indenter body, and a load transfer steel plate connecting the indenter body and the reinforcing material. Trenchless structure to be constructed. According to paragraph 2,
A portion of the upper surface and side surface of the hollow rectangular-shaped conduit is mounted inside the reinforcing material spaced apart from the press body body, but is disposed adjacent to an end of the load transfer steel plate to minimize membrane collapse. Trenchless construction of cast structures. According to paragraph 1,
The precast culvert is inserted with an end seated on the step portion inside the lead pipe, and a plurality of precast culverts are connected and press-fitted together with the lead pipe. A precast structure to minimize block collapse. A trenchless structure to be constructed. According to paragraph 4,
Parts of the upper and side parts of the conduit are inserted into parts of the upper and side parts of the small press body, and the front of the precast culvert is inserted into the inside of the conduit, and the precast culvert is connected to the conduit and the small indenter. Trenchless construction of a precast structure to minimize membrane collapse is guided by an indenter and press-fitted to a preset position, and when the precast culvert is press-fitted, the tip resistance is reduced compared to press-fitting without the small indenter. structure. According to paragraph 2,
A trenchless structure for constructing a precast structure to minimize membrane collapse, characterized in that the lower part and side portions of the press-fitted body and a portion of the reinforcing material are cut during press-fitting of the lead pipe and the precast culvert.