KR100538272B1 - The methods of trenchless underway construction using pre-cast assembly concrete box - Google Patents

Abstract

The present invention relates to an unattached underground passage construction method (TUPAC method) using a prefabricated structure, and in more detail, the primary purpose of reinforcing by arranging pipe loops in an arched or open box type. After attaining the excavation of soil, at the same time, the construction method of propulsion and installation using prefabricated concrete segments of arched or box type is developed according to the domestic situation. It is about public law.

Description

The method of trenchless underway construction using pre-cast assembly concrete box

The present invention relates to an unattached underground passage construction method using a prefabricated structure, which will be described in more detail, after arranging pipe loops in an arched type or an open box type to achieve a primary reinforcement object. And unearthed underground passage construction method using prefabricated structure to reduce construction cost and shorten construction period by developing method to propel and install using prefabricated concrete segment of arch or box type at the same time .

   Nowadays, the social infrastructure for the safer and more convenient road environment is being actively promoted, and the intersection between transportation facilities is inevitable. In particular, when constructing a structure that crosses railroads or roadways, it is constructed by non-adhesive propulsion to increase the size of the transverse structure and increase the extension distance of the structure while minimizing the influence on railroad tracks or road pavement. The number of cases increases every year.

  Until now, when constructing a structure crossing railroads or roads in Korea, most of the construction methods to complete the box propulsion structure are mainly the pipe loop method developed in Japan as the auxiliary method, and the front jacking method as the main method. However, due to the double process of the pipe loop method and the box propulsion method, there is a disadvantage in that a huge construction cost is required, and the construction period is long.

  In foreign countries, for example, construction methods that cross railroads or roads can be divided into five types.

First, a front-jacking method is a method of constructing a cross-section structure by towing and pushing concrete boxes manufactured in advance in a factory or a field by a towing type front jacking. The main feature is a steel tool at the tip. It can tow the box structure attached with the gut to the leading ground, and can propel it regardless of the size of the box structure, to cope with all soil conditions, and to significantly shorten the construction period by using the box structure of the existing product. Do. The construction sequence is completed by pipe loop propulsion work, attaching steel tools to the box structure, assembling the box structure, binding the box structure, completing the box structure assembly, and pushing the box structure.

Second, ULT (Under Railway Tunnel) method is a tunnel method that directly constructs the tunnel structure crossing the railway line and the road under current use, and divides the tunnel return section into several suitable size units. After digging in the tunnel axial direction and tunnel tunneling, the soil is excavated and removed to complete the tunnel. Since this method uses each unit as a main body structure, there is a feature that there is little construction work and coating restrictions are remarkably relaxed.

Third, the HEP (High Speed Element Pull) method is a new method developed for short-term construction of transverse structures under various traffic routes. Instead of the press-propulsion method, the element directly connected to the excavation device is moved to the forward base side by tensioning the PC steel attachment line attached to the excavation device by using a traction device installed at the arrival base B. As a towing method from the ground, high-precision construction by the traction method, no reaction force wall equipment on the forward base side is required, and there is an advantage of quickly responding to obstacles in the leading ground and systemizing the construction management, as shown in FIG. The element pulling method in the HEP method is that the reference element inserts a PC steel attachment line into the hole excavated in the leading ground by the horizontal boring method. Then, the excavation device and the element are connected to the PC steel attachment line and towed by the hydraulic jack from the arrival base side, and the towing of the next connected elements is performed by the elements of the pre-propelled element. Horizontal boring is not necessary for the propulsion of the elements after the second one, since it is carried out sequentially using a PC steel attachment line which is attached to one side and is completed.

Fourth, the JES (Jointed Element Structure Method) method is a new construction method for constructing a cross-section structure under a railroad or road line in a short period of time, and an element can transmit force in the direction perpendicular to the axis. Use steel elements with joints.

By using a main body system in which joints cross-fuse each other for this element, it is possible to construct structures under various routes without any limitation in extension of box-type or circular shape. JES method has a structure that transmits the tensile force generated in the member by the joint connection between the elements (Element), as shown in Figure 12 has a sufficient structural strength, the reference element (Element), the general part It is composed of elements, corner elements, tee elements, adjustment elements, etc. and inserts elements at predetermined positions while connecting joints sequentially. Assemble to build structure. Less influence on the rail track surface or pavement surface, can easily build an integrated structure, excellent construction and economical advantages.

Fifth, the pipe loop method arranges and installs steel pipes in proper shape before tunnel excavation, and induces beam action of steel pipes during tunnel excavation, so as to obtain dispersion effect and relief effect of load, earth pressure, etc. applied to tunnel. Therefore, the steel pipe span between virtual underground points considering the relaxation area of the membrane front at the front hole location of the tunnel is analyzed by the concept of simple beam or continuous beam, and the safety of the steel pipe and tunnel structure is examined. The analysis method to analyze is mainly adopted at the time of design. The pipe loop method is a method that obtains the effect of reducing the earth pressure and relaxation area of the upper part by installing a support material before tunnel excavation in the same principle as the steel plate or the Messel method. Even if it is present, it can be supported by causing the shear strength of the soil, so the single pipe separation installation method is mainly used in terms of economy and constructability. However, if the groundwater level is high and the independence is low, and the soil is expected to leak through the gap between the steel pipes, or if the toffee is extremely shallow and directly receives a large load, the connection joints are installed between the steel pipes. By forming a complete steel pipe structure, a method of reflecting the effects of the deflection amount of the steel pipe and the degree of groundwater discharge on the stability of the tunnel and the upper structure has been applied.

 The pipe loop method inserts a certain size of steel pipe into the ground before excavation and causes the beam of the steel pipe to act on the ground to support the upper and surrounding ground, thus greatly reducing the load. It is used for various purposes. Pipe loop method is to arrange steel pipes in proper shape according to the size of load, geological condition, characteristics and size of adjacent structures, toffee thickness of tunnel, and to cope with environmental and geological elements. It has been considered that it can be installed in any place where the aperture can be installed, but recently, Percussion Type horizontal drilling equipment has been developed. As it spreads, geological elements are not a problem in construction. Pipe loops are generally on the road. Auxiliary means for rail crossings: roads. It is used for railroad protection, excavation tunnel self-stabilization, and auxiliary means for the construction of single-sided tunnels: protection of underground enlarged cross-sections, underground stations, and tunnel protection in the construction of large cross-sections.

 The pipe loop method inserts a certain size of steel pipe into the ground before excavation, and it acts to support the upper and surrounding ground by inducing the beam action of the steel pipe during the ground excavation. It is used. Pipe loop method is to arrange steel pipes in proper shape according to the size of load, geological condition, characteristics and size of adjacent structures, toffee thickness of tunnel, and to cope with environmental and geological elements. It has been considered that it can be installed at any place where the aperture can be installed, but recently, Percussion type horizontal drilling equipment was developed. As it spreads, geological elements are not a problem in construction. Pipe loops are generally on the road. Auxiliary means for rail crossings: roads. It is used for railroad protection, excavation tunnel self-stabilization, and auxiliary means for the construction of single-sided tunnels: protection of underground enlarged cross-sections, underground stations, and tunnel protection in the construction of large cross-sections.

In Korea, where the introduction of the propulsion method is short, the recognition level of the propulsion method is still very low, and the propulsion method is not recognized as a completed method in the geotechnical field such as the existing tunnel method. At present, however, Japan, the leader of the propulsion method, is setting up the propulsion method as a separate field from the large-diameter tunnel method, and is making great efforts to develop new propulsion technologies. Due to various domestic circumstances different from Japan, an independent propulsion method should be developed for the Korean situation.

In order to solve the above problems, the present invention achieves the primary reinforcement object by arranging the pipe loops in an arced (Arched-type) or an open box type (,)), and at the same time as the earth and sand excavated arch or box-shaped prefabricated concrete It is a technical task of the present invention to provide a method for constructing an underground passageway using a prefabricated structure that reduces construction costs and shortens the construction period by developing a construction method to promote and install using segments.

In order to solve the above object, the present invention describes the construction method of the non-adhesive underground passage using the prefabricated structure in the order of the process,

 Then, both ends of the steel pipes (loop holes) are fixed and attached to the H-Beam 10 so that the steel pipes do not move during the propulsion of the prefabricated structure, and a connection structure is formed. After connecting the tie rod (Tie-Rod) (11) to the various parts of the H-Beam (10), it is fixed by installing an anchor (12) in the vertical direction on the ground.

In addition, the H-Beam 10 in the vertical and vertical direction is fixed by inserting the foundation portion into the ground, and then connecting the tie rods 11 in the same manner as described above. ) To fix it.

 Then, in order to prevent the steel pipes from moving during the propulsion of the prefabricated structure, both end faces of the steel pipes (loop holes) are fixed and attached with H-Beam 10 to form a connection structure, and H-Beam After connecting the tie rod (Tie-Rod) (11) to the various parts of the (10), the anchor (12) in the vertical direction to the ground (installation) is fixed.

And the H-Beam (10) in the vertical and vertical direction is fixed by inserting the base portion in the ground, and after connecting the tie-Rod (11) in the same manner as above to install the anchor 12 on the ground.

The second process (see Fig. 5) is to install the hydraulic jack propulsion reaction wall in the forward base (A), and then install the hydraulic jack and rail, square bar and the like. In the next process, the prefabricated structure (arc or box reinforced concrete structure) 100,100 'produced according to the field process and the conditions in accordance with the rail connection joint attached to the lower surface of the steel pipe (loop hole), the outer surface of the prefabricated structure Attach the rail for connection to the joint. (See Figures 7,8)

In addition, depending on the ground conditions, before laying gravel in the prefabricated structure box, use steel materials such as H-Beam or reinforce the foundation by laying foundation concrete and laying gravel using crude steel cement. The work is performed by installing and pushing the prefabricated box propulsion rails.

And before the prefabricated structure (100,100 ') is propelled, the ground of the propulsion tip is excavated about 0.5m 1.5m according to the ground condition, and then the gravel is laid at the bottom of the ground and the foundation concrete (using the steel cement) is laid. After strengthening, install the rail and use the hydraulic pump unit and hydraulic jack to smoothly push and install the prefabricated structure.

In addition, if necessary, depending on the ground conditions, before laying gravel in the prefabricated structure box, use steel materials such as H-Beam, or use crude steel cement, etc. to install the foundation concrete, and install the gravel to reinforce the foundation and promote the prefabricated structure box. Work is carried out by installing and pushing the rails.

After that, the demolition and tie-rod of H-Beam located at both ends of the steel pipe are removed, and then plastering and finishing work on both sides of the underground passage is performed.

In the third process (see FIG. 6), after the completion of the propulsion work of the prefabricated structure, after the withdrawal of various propulsion equipment and the removal of the reaction wall in the forward base A, the gap between the prefabricated structure and the lower surface of the steel pipe pipe-roof hole The filling operation is carried out using a filler such as mortar to increase the structural strength of the structure.

Then, after demolition and tie-rod of H-Beam located on both ends of the steel pipe, the plastering and finishing work on both sides of the underground passage is carried out.

And when the drainage treatment from the upper surface of the railway and the road to the lower surface is required to perform horizontal boring work on the top of the steel pipe pipe portion, install a perforated pipe so that the drainage is smooth.

Hereinafter, the present invention will be described in detail with reference to Examples.

Example

Both ends of the constructed steel pipe 3 are fixedly attached (welded) to the H-Beam 10 to form a connection structure, and the T-rods are formed on various parts of the H-Beam 10. After connecting (Tie-Rod) (11), by fixing the anchor (12) in the vertical direction on the ground,

The front surface of the vertical and longitudinal steel pipes 3 constructed at regular intervals is fixedly attached (welded) using an H-Beam 10, but is a lower part of the H-Beam 10. After inserting the part into the ground and fixing it, the tie rod (Tie-Rod) 11 is connected in the same manner as above, and then the anchor 12 is installed on the ground to fix and prepare.

After connecting both end faces of the constructed steel pipe (3) with H-Beam (10), make a connection structure, and connect Tie-Rod (11) to various parts of H-Beam (10). , Fixed by installing the anchor (12) in the vertical direction on the ground,

After fixing (welding) the front surface of the vertical and vertical steel pipe (3) constructed at regular intervals using H-Beam (10), insert the base part, which is the lower part of H-Beam (10), in the ground and fix it. After the tie-rod 11 is connected in the same manner as above, the anchor 12 is installed on the ground to be fixed and prepared.

Second Process (Promotion Process)

After installing the hydraulic jack propulsion reaction wall 25 in the forward base A, the hydraulic jack 22 connected by the hydraulic press 20 and the hydraulic hose 21 and the lower rail provided under the hydraulic jack 22 are provided. 31 and the square bar 24 is installed on the front surface of the cylinder 23 of the hydraulic jack 22,

After placing the prefabricated structures 100 and 100 'having the rail attachment joints 101 on the upper and side surfaces thereof on the lower rail 31 of the forward base A, the front end shoe for the excavation protection at the tip of the prefabricated structure 100 and 100'. (Shoe) (200) attached,

   (At this time, after the rail attachment joints 101 of the prefabricated structures 100 and 100 'are matched to the joint joint rails 4 attached to the lower surface of the steel pipe 3, see Figs. 7 and 8)

After the propulsion of the prefabricated structure is completed, the withdrawal of various propulsion equipment and the reaction wall dismantling work in the forward base (A) is carried out, and then the filling material such as mortar is used in the gap between the prefabricated structure and the lower surface of the steel pipe pipe (3). Filling operation is performed to increase the structural strength of the prefabricated structures (100, 100 ') and to remove and tie-rod (H-Beam) 10 located at both ends of the steel pipe (2). After dismantling 11), perform plastering and finishing work on both sides of the underground passage, and horizontal boring work on the upper part of the steel pipe 3 for drainage treatment from the rail and the upper surface of the road to the lower surface. In addition, if necessary, drainage was installed smoothly, and the underground passages were constructed without prefabricated structures.

3rd process (reinforcement and finishing process)

1 and 2 detailed front view of an unattached underground passage using the prefabricated structure of the present invention, FIG. 3 a detailed cross-sectional side view of an unattached underground passage using the prefabricated structure of the present invention, FIG. 5 is a detailed view of the second process of the present invention, FIG. 6 is a detailed view of the third process of the present invention, and FIGS. 7 and 8 are detailed views of the prefabricated structure of the present invention, and the road and the railway line (1), the ground (2), Steel pipe pipe (3), connection joint rail (4), steel pipe pipe connection (5), ech beam (10), tee-rod (11), anchor (12), oil press (20), hydraulic hose (21), Hydraulic jack (22), cylinder (23), square rod (24), repellent wall (25), lower rail (31), gravel foundation and rough concrete floor (32), prefabricated structure (100, 100 '), rail attachment joint (101) ), The structure connection portion 110, the tip shoe 200, the forward base (A), it can be seen that the base shown (B).

Hereinafter, an underground passage building apparatus using the prefabricated structure of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 detailed front view of an unattached underground passage using the prefabricated structure of the present invention, FIG. 3 a detailed cross-sectional side view of an unattached underground passage using the prefabricated structure of the present invention, FIG. 5 is a detailed view of the second process of the present invention, FIG. 6 is a detailed view of the third process of the present invention, FIGS. 7 and 8 are detailed views of the prefabricated structure of the present invention, and FIGS. 9 to 13. The road and track (1), the ground (2), steel pipe pipe (3), connection joint rail (4), steel pipe pipe connection (5), ech beam 10, tee-rod (11) , Anchor 12, hydraulic 20, hydraulic hose 21, hydraulic jack 22, cylinder 23, square bar 24, rebound wall 25, lower rail 31, gravel foundation and steel concrete It can be seen that the bottom 32, the prefabricated structure (100, 100 '), the rail attachment joint 101, the structural connection portion 110, the tip shoe 200, the forward base (A), the reach base (B).

Looking at the structure, after setting the size and location of the underground passage to be built on the track or the lower part of the road (see Fig. 4), using the provisional facilities for construction on both sides of the rail or road surface, A hydraulic jack 22 connected by a hydraulic unit 20 and a hydraulic hose 21 for propelling the assembled structures 100 and 100 'to the base A, and a lower rail 31 provided below the hydraulic jack 22; And, it is a structure of the underground passage building device using a prefabricated structure consisting of a square push rod 24 installed on the front of the cylinder 23 of the hydraulic jack 22, and the reaction force wall 25 provided on the rear of the hydraulic jack 22. .

The device of the present invention is a device for advancing a prefabricated structure (100, 100 '). Deleted part

Prefabricated structures (100, 100 ') used in the present invention can be manufactured in an arched or door-shaped, and the rail attachment joints 101 are provided on the upper and side surfaces except for the lower side in contact with the prefabricated structures (100,100') and ,

  The tip shoe 200 is attached to the tip, and the structure connecting portion 110 is installed at the prefabricated structure (100, 100 ') position to be connected.

  In addition, the steel pipe 3 of the present invention is a structure in which the connection joint rail 4 is installed on one side of the lower portion.

    The present invention as described above may have a significant reduction in the construction period compared to the first several existing construction methods. This requires existing methods to reinforce the upper ground line by using pipe loops, and to prolong the construction period by simultaneously using the front jacking and the pneumatic propulsion oil press for precision propulsion, or after the line excavation, the secondary reinforcement. However, there is a disadvantage that it takes a long time to construct the aisle body after carrying out the 3rd reinforcement work, but this method is a prefabricated structure aisle which is made to order in the factory immediately after the steel pipe pipe roofing work. After propelling the main body with a hydraulic jack, secondary charging is performed at one time with a mortar or the like, which can greatly shorten the construction period.

Second, there is a significant reduction in construction costs compared to many existing construction methods. The equipment required for this process requires less equipment combinations and the propulsion equipment is relatively simple compared to the existing method, so that significant cost savings can be realized, and material and labor costs can be significantly reduced. It can be done.

Third, this method can be applied to various passages such as groundwater passages and wildlife movement passages as well as the existing passages or underground passages below the roads, so the scope of application in the field is very wide.

Fourth, in the case of box passage propulsion work using the front jacking method, which is widely used in Korea, the upper part of the box passage is pushed between the upper surface of the box passage being propelled and the lower surface of the pipe loop hole constructed by line reinforcement. Although sand is filled by inserting and laying sand at the interface, most of it is unbalanced, so there is a possibility of causing ground subsidence after the completion of the construction. After the pipes for filling material such as mortar are installed between the lower surfaces of the pipe loop holes, air vent pipes are installed on the forward base (A) side and the reaching base (B) side to complete the prefabricated structure box. Filling materials, such as mortar, are completely filled with dedicated grout pumps, etc., so that there is no risk of ground subsidence after completion of construction. do.

In addition, this method is installed in the state of interlocking with each other by installing joint connection rails at the lower side and both sides of the steel pipe pipe loop hole and the prefabricated structure box and both sides, which are constructed for the introduction steel. It is not caused.

Fifth, in order to prevent the occurrence of leakage of groundwater, etc. from the upper surface of the ground to the underground passage, horizontal boring work is performed on the upper part of the pipe loop hole interface according to the ground conditions, and drainage work is installed by installing drainage pipes. Because it can proceed smoothly, it is possible to eliminate the concerns caused by the leakage problem such as groundwater.

1 and 2 the front of the non-adhesive underground passage using the prefabricated structure of the present invention

              Detail

Figure 3 is a side cross-sectional view of the non-adhesive underground passage using the prefabricated structure of the present invention

4 is a detailed view of the first process of the present invention.

5 is a detailed view of a second process of the present invention.

6 is a detailed view of the third process of the present invention

7 and 8 detail of the prefabricated structure of the present invention

  Explanation of symbols in the drawings

delete

        Road and track (1), ground (2), steel pipe pipe (3), connection joint rail (4), steel pipe pipe connection (5), H-Beam (10), tee-rod (11), anchor (12) ), Hydraulic press 20, hydraulic hose 21, hydraulic jack 22, cylinder 23, square rod 24, rebound wall 25, lower rail 31, gravel foundation and crude concrete floor (32) , Prefabricated structure (100, 100 '), rail attachment junction 101, structure connection unit 110, tip shoe 200, forward base (A), reach base (B).

Claims (3)

In the non-adhesive underground passage construction method using the prefabricated structure, First process (preparation process) After setting the size and location of the underground passage to be constructed at the lower part of the railway or road (see Fig. 4), use the temporary facilities for construction on both sides of the railway or the road surface. After the installation base (B) is installed, the prefabricated structure (100, 100 ') is set to be arched or door-shaped around the position to be propelled, and then the connection joint rail (4) is provided with a steel pipe pipe (1) 3) Promote and install using conventional propulsion methods (hydraulic propulsion method, pneumatic strike propulsion method, auger excavation propulsion method) and the device according to the condition and diameter of the ground (2), and then in the steel pipe (3) Fill the mortar, etc.  Both ends of the constructed steel pipe 3 are fixedly attached (welded) to the H-Beam 10 to form a connection structure, and the T-rods are formed on various parts of the H-Beam 10. After connecting (Tie-Rod) (11), by fixing the anchor (12) in the vertical direction on the ground, The front surface of the vertical and longitudinal steel pipes 3 constructed at regular intervals is fixedly attached (welded) using an H-Beam 10, but is a lower part of the H-Beam 10. After inserting the part into the ground and fixing it, the tie rod (Tie-Rod) 11 is connected in the same manner as above, and then the anchor 12 is installed on the ground to fix and prepare. Second Process (Promotion Process)   After installing the hydraulic jack propulsion reaction wall 25 in the forward base A, the hydraulic jack 22 connected by the hydraulic press 20 and the hydraulic hose 21 and the lower rail provided under the hydraulic jack 22 are provided. 31 and the square bar 24 is installed on the front surface of the cylinder 23 of the hydraulic jack 22,   After placing the prefabricated structures 100 and 100 'having the rail attachment joints 101 on the upper and side surfaces thereof on the lower rail 31 of the forward base A, the front end shoe for the excavation protection at the tip of the prefabricated structure 100 and 100'. (Shoe) (200) attached,    (At this time, the rail attachment joint 101 of the prefabricated structures 100 and 100 'corresponds to the joint joint rail 4 attached to the lower surface of the steel pipe 3)   Before the prefabricated structure (100,100 ') is propelled, the ground of the propulsion tip is excavated about 0.5m ~ 1.5m according to the ground condition, and then gravel is laid at the bottom of the ground and the foundation concrete (using the steel cement) is laid. After forming the part 32, the lower rail 31 is connected and installed and the hydraulic 20 is operated to propel the prefabricated structure 100, 100 'by using the hydraulic jack 22 and the square bar 24. When the first prefabricated structure (100,100 ') is completed, the second prefabricated structure (100,100') is installed in the propulsion position in the forward base (A), and the connection between the first and second prefabricated structures (100,100 ') Propulsion by installing the structure connecting portion 110 provided with an outer steel plate cover so that the part is not damaged, 3rd process (reinforcement and finishing process)  After the propulsion of the prefabricated structure is completed, the withdrawal of various propulsion equipment and the reaction wall dismantling work in the forward base (A) is carried out, and then the filling material such as mortar is used in the gap between the prefabricated structure and the lower surface of the steel pipe pipe (3). After the filling operation, the demolition and tie-rod 11 of the H-Beam 10 located at both ends of the steel pipe 2 are removed, and then the top of the steel pipe 3 is removed. After the horizontal boring work on, the unsealed underground passage construction method using a prefabricated structure characterized in that the drainage is installed smoothly. delete delete