JP2004027813A5 - - Google Patents

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Publication number
JP2004027813A5
JP2004027813A5 JP2002317469A JP2002317469A JP2004027813A5 JP 2004027813 A5 JP2004027813 A5 JP 2004027813A5 JP 2002317469 A JP2002317469 A JP 2002317469A JP 2002317469 A JP2002317469 A JP 2002317469A JP 2004027813 A5 JP2004027813 A5 JP 2004027813A5
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JP
Japan
Prior art keywords
grouting
packing
registered trademark
soil nailing
solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002317469A
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Japanese (ja)
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JP2004027813A (en
Filing date
Publication date
Priority to KR2020020018948U priority Critical patent/KR200290351Y1/en
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Publication of JP2004027813A5 publication Critical patent/JP2004027813A5/ja
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Pending legal-status Critical Current

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Description

[Description of the invention] Pressure type soil nailing (Registered trademark) Packer machine and soil nailing using the same (Registered trademark) Construction method
[Claim of claim]
1. A packer machine inserted in a hole drilled in an excavating surface for sealing a grouting area, wherein the nail and a longitudinal direction of the nail are fitted at a predetermined distance from each other at a central portion. A first packing and a second packing, and a non-woven fabric provided around the outer peripheral surface of the first packing and the second packing and sealing a space between the first packing and the second packing; A first grouting tube, which penetrates the first packing and the second packing, but has one end located close to one end of the nail, for injecting a grouting solution into the grouting area; The grouting is provided through the first packing and the second packing, but with one end thereof being adjacent to the second packing. Air and foreign matter removing pipe for removing air and foreign matter in the grouting area by the plug and the first packing, wherein one end portion thereof is in a space between the first packing and the second packing A pressure-type soil nailing provided with a urethane foam injection tube for injecting a foam urethane whose volume is expanded by gelation in a space provided so as to be located and sealed by the non-woven fabric (Registered trademark) Packer machine.
2. The second packing for penetrating grouting solution into the grouting region, provided penetrating through the first packing and the second packing, but with its end close to the second packing. The pressure soil nailing as set forth in claim 1, further comprising a grouting tube of (Registered trademark) Packer machine.
3. The combination of the first and second packings and the non-woven fabric according to claim 1, further comprising: The pressure soil nailing according to claim 1, further comprising a wire ring for closely bonding non-woven fabric to the outer peripheral surface of the first and second packings. (Registered trademark) Packer machine.
4. The pressure soil nailing according to claim 1, wherein the first and second packings are made of rubber. (Registered trademark) Packer machine.
5. Pressure-type soil nailing (Registered trademark) Soil nailing using a packer machine (Registered trademark) The method includes a step of excavating the ground to a stable height where the slope and the excavated wall can stand independently, a step of drilling a hole of a predetermined diameter at an appropriate position of the excavated ground, and a nail, The mounted pressure soil nailing (Registered trademark) Installing the packer machine in the perforation hole, and the pressure type soil nailing (Registered trademark) Forming an external isolated grouting area for injecting a grout solution by closely attaching the packer machine to the inner diameter of the perforated hole, injecting and filling the grouting area with the grouting solution, and The step of discharging air and foreign matter in the grooving area to the outside when the grout chemical solution is injected into the grooving area, the step of closing the passage through which the air and foreign matter are discharged, and closing the grooving area; And pressure-filling the grouting solution into the grouting area such that gaps and joints formed in the surrounding ground are also filled with the grouting solution. (Registered trademark) Soil nailing using a packer machine (Registered trademark) Construction method.
6. The method according to claim 5, further comprising the step of re-injecting the grout solution after a predetermined time has elapsed after the step of pressurizing and filling the grouting solution with the grout solution is completed. Pressure soil nailing (Registered trademark) Soil nailing using a packer machine (Registered trademark) Construction method.
Detailed Description of the Invention
[0001]
Field of the Invention
The present invention is soil nailing (Registered trademark) Packer machine and soil nailing (Registered trademark) With regard to the construction method, in particular, pressure sealing is suitable for improving the workability by close sealing and pressure grooving of the grouting area formed inside the drilled hole, that is, pressure filling of the grout solution. (Registered trademark) Packer machine and soil nailing using the same (Registered trademark) It relates to the construction method.
[0002]
[Prior Art]
Generally, with the development of industry, it is now inevitable that the development of steep slopes such as mountain areas is inevitable due to the composition of housing complexes and the construction of new cities.
[0003]
Therefore, there is a need to establish a slope stabilization method that can increase the degree of land use, secure the stability and comfort of the housing complex, and satisfy construction, economy, and environmental conservation.
[0004]
Soil nailing most widely adopted as slope stabilization method (Registered trademark) Is a ground reinforcement method and is widely used in Europe and the United States for the purpose of slope reinforcement and flexible support for excavated surfaces.
[0005]
Such soil nailing (Registered trademark) In the construction method, nails are inserted into the ground at relatively fine intervals without prestressing, and the overall shear strength of the ground itself is increased to minimize possible ground displacement during or after construction. Construction method.
[0006]
In particular, in the case of the alternative structure of the excavation site, the soil nailing as compared with other construction methods such as heavy concrete wall, parent pile wall and in-situ cast slurry wall etc. (Registered trademark) The construction method has relative merits such as low construction cost, lightweight construction equipment, adaptability of site conditions and ground conditions, flexibility, etc., and large displacement even in case of dynamic load such as earthquake And has a feature that can fully demonstrate the resistance ability.
[0007]
Such soil nailing (Registered trademark) The basic design concept of the method is that the soil mass in the area reinforced by the nailing acts as an integral retaining wall to maintain stability on any inclined surface.
[0008]
Conventional soil nailing (Registered trademark) The construction method is carried out in the order of ground excavation, installation of nails, placement of shot cleats, excavation, etc. This will be described with reference to FIGS. 5 (a) to (d) and FIG. is there.
[0009]
First, as shown in FIG. 5 (a), the ground is excavated at a stable height at which the slope and the excavated wall 1 can stand.
[0010]
That is, ground excavation for providing a slope protection hole and a reinforcement is fundamentally the same as general ground excavation.
[0011]
But soil nailing (Registered trademark) Since the excavated surface in is often used as a main body structure, it is necessary to excavate to an accurate position and shape. In addition, consider the depth of excavation where the ground can stand on its own due to soil quality, and the training period for injection grout and shotcrete to obtain a predetermined strength.
[0012]
Usually, the limit of the drilling depth is related to the apparent cohesion of the ground, and it is preferable to limit the vertical drilling by stages up to 2 m.
[0013]
Next, as shown in FIG. 5 (b), after the wall 1 is perforated to provide a reinforcing material, the nail 3 is provided in the perforated hole.
[0014]
At this time, the drilling is performed using a rock drilling machine, a boring machine or the like, and mostly using a fluid (air, water, cement grout, bentonite).
[0015]
Usually soil nailing (Registered trademark) As the nail 3 used for the construction method, deformed rebar, steel rod or the like can be used, and harmful soil, oil and the like of the part to be adhered with grout must be removed in advance.
[0016]
The nail 3 used for the permanent structure should consider allowance for corrosion at the time of design or must use a rustproofed strong material, and it is preferable to use the nail 3 without joint, but the insertion length If it is too long and must be connected, a coupler must be used, and it is not possible to connect by general welding.
[0017]
When inserting the nail 3, it is preferable to use a spacer so that the nail 3 is located at the center of the perforated hole in order to ensure the minimum thickness of the grout.
[0018]
Next, as shown in FIG. 5 (c), after placing the shot cleats, when the shot cleats are trained, further ground excavation is carried out as shown in FIG. 5 (d).
[0019]
On the other hand, the process of providing the nail 3 in the perforated hole is performed as follows.
[0020]
First, after the nail 3 is inserted into the perforated hole 11, cement milk (not shown) is grouted inside the hole without pressure.
[0021]
Next, after the wire mesh 13 is provided on the wall surface 1, the reinforcing bars 15 are disposed laterally on the wire mesh 13.
[0022]
Next, the reinforcing bar 15 is crimped and fixed by the plate 17 and the nut 19 fastened to the nail 3 and then a shot cleat is driven toward the wall surface.
[0023]
At this time, the grouching must be made to completely fill the inside of the drilled hole 11, and must be repeated three to six times due to the tendency of the grout solution to penetrate the surrounding ground.
[0024]
[Problems to be solved by the invention]
However, the conventional soil nailing as described above (Registered trademark) The construction method requires a long consolidation time to apply gravity grouting, and in order to complement the shrinkage phenomenon, it has been necessary to repeat about 3 to 6 times of grouting.
[0025]
This makes the conventional soil nailing (Registered trademark) The construction method has a problem that the construction period is prolonged because the process is long and the workability is lowered.
[0026]
Furthermore, the downward inclination of the drilled hole makes it impossible to fill the grouting area with grout chemical solution, which creates a gap between the drilled hole and the ground, which is fatal to the ground reinforcement. Problems that cause serious defects.
[0027]
The present invention has been made to solve the problems of the prior art as described above, and the grooving proceeds in a state in which the grooving area is completely sealed by injecting a quick-fixing expansion agent into the packer machine. Can shorten the air and improve the workability. Pressure soil nailing (Registered trademark) Packer machine and soil nailing using the same (Registered trademark) The purpose is to provide a construction method.
[0028]
Furthermore, another object of the present invention is to use a pressurized soil nailing method. (Registered trademark) Pressure-based soil nailing suitable for improving the stability of the ground reinforcement by filling the grout solution up to the space between the drilling hole and the ground or the space of the ground (Registered trademark) Packer machine and soil nailing using the same (Registered trademark) It is to provide a construction method.
[0029]
[Means for Solving the Problems]
Pressure-type soil nailing of the present invention to achieve the above object (Registered trademark) The packer machine is a packer machine inserted in a hole drilled in an excavating surface to seal the grooving area, and the nail and the longitudinal direction of the nail are fitted at a predetermined distance from each other at a central portion. A first packing and a second packing, and a non-woven fabric provided around the outer peripheral surface of the first packing and the second packing and sealing a space between the first packing and the second packing; A first grouting tube, which penetrates the first packing and the second packing, but has one end located close to one end of the nail, for injecting a grouting solution into the grouting area; The first and second packings are penetrated with one end provided close to the second packing; An air and foreign matter removing pipe for removing air and foreign matter in a grouting area by a casting, and penetrating the first packing, but one end portion thereof is in a space between the first packing and the second packing It is characterized in that it comprises a foaming urethane injection tube for injecting a foaming urethane which is provided so as to be located and sealed in volume by gelation in a space sealed by the non-woven fabric.
[0030]
Here, the pressure type soil nailing (Registered trademark) A packer machine is provided through the first packing and the second packing, but with its end close to the second packing, and a second for injecting grout solution into the grouting area Grooving tube is further provided, and is provided on the outer side of the non-woven fabric along the outer peripheral surface of the first and second packings to connect the first and second packings and the non-woven fabric, and It is preferable to further include a wire ring that tightly bonds the non-woven fabric to the outer peripheral surface of the first and second packings by tightening.
[0031]
In addition, the pressure type soil nailing of the present invention (Registered trademark) Soil nailing using a packer machine (Registered trademark) The construction method comprises the steps of excavating the ground to a stable height where the slope and the excavated wall can stand independently, drilling the hole of a predetermined diameter at the proper position of the excavated ground and forming a perforated hole, and mounting the nail Said pressure type soil nailing (Registered trademark) Installing the packer machine in the perforation hole, and the soil nailing (Registered trademark) Forming an isolated grouting area for injecting a grouting solution by bringing the packer machine into intimate contact with the inner diameter of the bored hole, injecting the grouting solution into the grouting area, and filling the grouting area. And discharging the air and foreign matter in the grouting area to the outside, blocking the passage through which the air and foreign matter are discharged to close the grouting area, and surrounding the perforation hole. And pressing and filling the grouting solution in the grouting area such that gaps and joints formed in the ground are also filled with the grouting solution.
[0032]
The method may further include the step of injecting the grout solution again after a predetermined time has elapsed after the step of pressurizing and filling the grouting solution with the grout solution is completed.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the pressure type soil nailing of the present invention will be described with reference to the attached drawings. (Registered trademark) Explain the packer machine.
[0034]
FIG. 1 shows the pressure soil nailing of the present invention. (Registered trademark) 2 is a perspective view of a packer machine according to the present invention. (Registered trademark) 3 is an exploded perspective view of the packer according to the present invention. (Registered trademark) It is ground sectional drawing for demonstrating the mode of installation of the packer machine.
[0035]
As shown in the drawings, the pressure soil nailing of the present invention (Registered trademark) In the packer machine, the first packing 33a and the second packing 33b are fitted at predetermined intervals in the longitudinal direction of the nail 31 in which screw irregularities are provided on the outer peripheral surface.
[0036]
In addition, a non-woven fabric 35 is provided which encloses the outer peripheral surface of the first packing 33a and the second packing 33b to seal the space between the first packing 33a and the second packing 33b.
[0037]
Here, instead of the non-woven fabric 35, nylon, tent fabric or the like may be used, and the pressure due to the expansion of the volume of the urethane foam injected into the space between the first packing 33a and the second packing 33b. Any material can be used as long as the material can sufficiently withstand the
[0038]
Further, as the material of the first packing 33a and the second packing 33b, rubber, soft plastic, wood, iron plate or the like can be used, and of these, the rubber material is most preferable as the material of the packing.
[0039]
That is, when rubber packing is used, tight bonding is possible between the packing and the grooving pipe, which will be described in more detail below, or the air and foreign matter removing pipe, urethane urethane injection pipe or the like.
[0040]
Also, the pressure type soil nailing of the present invention (Registered trademark) The packer machine is provided with a first grouting tube 37 for penetrating the first packing 33a and the second packing 33b and for injecting the grouting solution primarily into the grouting area, An air and foreign matter removing pipe 39 is provided through the packing 33a and the second packing 33b to discharge air and foreign matter in the grouting area by the grooving.
[0041]
At this time, the first grouting tube 37 is preferably provided such that one end thereof is close to the end of the perforated hole, that is, one end of the nail 31. One end is preferably provided to be close to the second packing 33b.
[0042]
For reference, the air and foreign matter removing pipe 39 not only discharges foreign matter such as air and water generated in the grouting area to the outside of the perforated hole by injecting grout chemical solution, but also air and foreign matter. After removal, pressure is applied to the grooving area by closing the inlet.
[0043]
At this time, when pressure is applied to the grouting area, the grout solution is consolidated, and at the same time, the grouting solution is also tightly filled in the gaps or joints formed in the ground around the drilling hole by the pressure. Soil nail (Registered trademark) Can improve the overall stability of the
[0044]
Also, the pressure type soil nailing of the present invention (Registered trademark) In the packer machine, a foam urethane injection pipe 43 for injecting a quick-setting expansion agent such as foamable urethane into the space sealed by the non-woven fabric 35 is provided so as to penetrate the first packing 33a. .
[0045]
Here, one end of the foam urethane injection tube 43 is located in the space between the first packing 33a and the second packing 33b.
[0046]
The foamable urethane is injected as a urethane chemical in a state where the nail 31 is provided and gelated, but the urethane chemical is gelled in the space between the first packing 33a and the second packing 33b. Progress, thereby causing the volume to expand.
[0047]
Usually, urethane chemicals have the advantage of being able to adjust various properties such as the foaming ratio, mechanical strength, etc. in extremely diverse ways, and the time for which the urethane chemicals are actually gelled is only a few minutes, so When filling the space sealed by the non-woven fabric 35, several minutes after filling, the primary grout solution can be injected.
[0048]
In order to connect the non-woven fabric 35 and the first and second packings 33a and 33b, a wire ring 45 is provided on the outside of the non-woven fabric 35 along the outer peripheral surface of the first and second packings 33a and 33b. Be
[0049]
The wire ring 45 tightly bonds the non-woven fabric 35 with the outer peripheral surfaces of the first and second packings 33a and 33b by a screw tightening method, whereby a urethane solution is injected into the non-woven fabric 35 to cause volume expansion. Even more robust support is possible.
[0050]
Furthermore, the pressure type soil nailing of the present invention (Registered trademark) The packer machine includes a second grouting tube 41.
[0051]
Here, the second grooving tube 41 penetrates the first packing 33a and the second packing 33b, provided that one end thereof is close to the second packing 33b.
[0052]
Such a second grouting tube 41 is a tube for injecting a secondary grouting chemical solution for filling the space if the space is generated inside the perforated hole by drying shrinkage of cement after primary grouting.
[0053]
The second grouting tube 41 fills the space not filled with the first grouting solution with the second grouting solution by pressure method so that a tight filling is performed over the entire grouting area, and a perforated hole is formed. The grouting solution is sufficiently filled up to the air gap formed in the surrounding ground.
[0054]
Hereinafter, the pressure type soil nail of the present invention (Registered trademark) Soil nailing using a packer machine (Registered trademark) The construction method will be described step by step with reference to FIG. However, this is the soil nailing of the present invention (Registered trademark) An embodiment will be described focusing on the use of a packer machine.
[0055]
Pressure type soil nailing of the present invention (Registered trademark) Soil nailing using a packer machine (Registered trademark) The construction method is ground excavation step S101, drilling hole formation step S102, and pressure soil nailing (Registered trademark) Packer machine installation step S103, isolated grouting area forming step S104, grout chemical solution filling step S105, air and foreign matter discharging step S106, grouting area sealing step S107, and grout chemical solution pressure filling step S108 It consists of
[0056]
Such soil nailing of the present invention (Registered trademark) Describing the construction method in detail, first, step S101 of excavating the ground to a stable height where the slope and the excavated wall surface can stand is advanced.
[0057]
Next, a step S102 of forming a drilled hole by drilling a hole of a predetermined diameter at an appropriate position of the excavated ground is advanced.
[0058]
Next, a pressure type soil nailing in which a nail 31 as shown in FIG. 1 is attached to the drilled hole of the excavated ground (Registered trademark) Step S103 of inserting and providing the packer machine is advanced.
[0059]
Next, the pressure type soil nailing (Registered trademark) The step S104 of advancing the packer machine in intimate contact with the diameter of the drilled hole and forming the isolated grouted area is carried out.
[0060]
Therefore, the rapid expansion agent such as a urethane chemical is injected into the space between the first packing 33a and the second packing 33b sealed by the non-woven fabric 35 through the foam urethane injection pipe 43. Become.
[0061]
The urethane solution, as mentioned above, has a very high rate of gelation, so it gels several minutes after injection, resulting in volume expansion.
[0062]
At this time, since the non-woven fabric 35 is expanded, the non-woven fabric 35 comes into close contact with the inner diameter of the perforated hole.
[0063]
Thereby, isolated grouting areas into which grout solution can be injected are formed inside the perforated holes.
[0064]
Next, step S105 of injecting and filling grouting solution such as cement milk into the grouting area is advanced.
[0065]
For that purpose, the grout solution is injected into the isolated grouting region through the first grouting tube 37.
[0066]
At this time, in order to smoothly fill the grouting region with the grout solution, air, foreign matter, and the like in the grouting region must be discharged to the outside.
[0067]
Therefore, at the same time as the grouting region is filled with the grouting chemical solution as described above, step S106 of discharging air, foreign matter and the like to the outside through the air and foreign matter removing pipe 39 is advanced.
[0068]
Next, the step of closing the grooving area by blocking the air and foreign matter discharge passage is advanced.
[0069]
Therefore, the air and foreign matter removing pipe 39 serving as a passage through which the air and foreign matter are discharged is closed.
[0070]
Next, by continuing to inject the grout solution, step S108 is performed to press-fill the grout solution in the grouting area.
[0071]
Such pressurized filling of the grout solution also fills the grouting solution into gaps and joints formed in the ground around the perforated hole.
[0072]
Here, the method may further include the step of injecting the grout solution again after a predetermined time has elapsed after the step S108 of pressurizing and filling the grouting solution is completed.
[0073]
This is because several tenths of minutes after the grouting region is filled with the grouting solution, drying shrinkage occurs along with the solidification of the filled grout solution, ie, cement milk, whereby near the second packing 33b In order to inject the grout solution into the space, an additional injection of the grout solution is required.
[0074]
At this time, since the second grouting tube 41 is provided such that one end thereof is in proximity to the second packing 33 b, the second grouting tube 41 does not have the primary grout solution filled therein due to drying shrinkage. The grout solution can be more easily filled nearby.
[0075]
After the above-described characteristic steps of the present invention are performed, work to finish the construction is then performed.
[0076]
For example, the step of providing a wire mesh on the ground wall is advanced.
[0077]
Next, after the reinforcing bars are arranged horizontally on the wire mesh, a step of pressing and fixing the reinforcing bars with a plate and a nut fastened to the nails 31 is advanced.
[0078]
Finally, the step of placing a shot cleat is advanced, and the pressure soil nailing of the present invention is carried out. (Registered trademark) Soil nailing using a packer machine (Registered trademark) Is completed.
[0079]
Although the preferred embodiments of the present invention have been described above, it is needless to say that various changes, modifications and equivalents can be used, and the above embodiments can be appropriately modified to be applied similarly. Accordingly, the above description should not be taken as limiting the scope of the invention which is defined by the limitations of the following claims.
[0080]
【Effect of the invention】
As mentioned above, the pressure soil nailing of the present invention (Registered trademark) Packer machine and soil nailing using the same (Registered trademark) The construction method has the following effects.
[0081]
Grouting is carried out under pressure while the inner surface of the perforated hole is tightly sealed using a packer machine injected with a quick-setting expansive agent, so the grouting can be completed in a short time, and the construction time Can be shortened.
[0082]
Also, pressurized soil nailing (Registered trademark) Thus, the grouting solution can be firmly filled up to the air gap or joint formed in the ground, so that the stability of the ground reinforcement can be improved.
Brief Description of the Drawings
FIG. 1 Pressure-type soil nailing according to the invention (Registered trademark) It is a perspective view of a packer machine.
[Fig. 2] Pressure type soil nailing of the present invention (Registered trademark) It is an exploded perspective view of a packer machine.
[Fig. 3] Pressure type soil nailing of the present invention (Registered trademark) It is ground sectional drawing for demonstrating the mode of installation of the packer machine.
FIG. 4 is a pressure soil nailing according to the present invention. (Registered trademark) Soil nailing using a packer machine (Registered trademark) It is the flowchart which showed the construction method according to step.
5a-5d illustrate soil nailing according to the prior art. (Registered trademark) It is a construction sequential figure for demonstrating a construction method.
[Fig. 6] Conventional soil nailing (Registered trademark) It is a conceptual diagram showing an example of installation of a nail by a construction method.
[Description of the code]
31 Nail
33a first packing
33b second packing
35 Non-woven fabric
37 First Grouching Tube
39 Air and foreign material removal pipe
41 Second grouting tube
43 shot urethane injection tube

JP2002317469A 2002-06-22 2002-10-31 Packer for pressure type soil nailing and method of soil nailing using it Pending JP2004027813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020020018948U KR200290351Y1 (en) 2002-06-22 A packer apparatus for pressure type soil nailing

Publications (2)

Publication Number Publication Date
JP2004027813A5 true JP2004027813A5 (en) 2004-01-29
JP2004027813A JP2004027813A (en) 2004-01-29

Family

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Family Applications (1)

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Country Status (4)

Country Link
US (1) US20030235472A1 (en)
EP (1) EP1375754B1 (en)
JP (1) JP2004027813A (en)
DE (1) DE60232139D1 (en)

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