CN211342915U - Pre-reinforcing system for advanced small catheter - Google Patents
Pre-reinforcing system for advanced small catheter Download PDFInfo
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- CN211342915U CN211342915U CN201922122933.9U CN201922122933U CN211342915U CN 211342915 U CN211342915 U CN 211342915U CN 201922122933 U CN201922122933 U CN 201922122933U CN 211342915 U CN211342915 U CN 211342915U
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- little pipe
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- 239000011435 rock Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000002787 reinforcement Effects 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000007596 consolidation process Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000009955 starching Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 18
- 239000011440 grout Substances 0.000 abstract description 5
- 238000007569 slipcasting Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model discloses an advance little pipe system of consolidating in advance, including the little pipe of advance, the little pipe of advance is provided with the bilayer along the full circumferencial direction in tunnel, the bilayer includes inlayer and middle level, inlayer and middle-level little pipe of advance all evenly insert along the tunnel circumferencial direction and establish in rich water soft rock, the little pipe of advance of inlayer and the equal staggered arrangement of middle-level little pipe of advance, 110-130 angle within range that arch at the top pressure in tunnel add outer little pipe of advance, outer little pipe of advance evenly inserts along the tunnel circumferencial direction and establishes in rich water soft rock, outer little pipe of advance and the equal staggered arrangement of middle-level little pipe of advance, evenly be provided with on the little pipe of advance and press the grout hole, be used for among the little pipe of advance and irritate the thick liquid, the tip of little pipe of advance is all fixed on the bow member in tunnel. The utility model discloses it is big to make slip casting reinforcement area, consolidates effectually, effectively consolidates loose rock mass, prevents that the tunnel from taking place the landslide to improve country rock level and construction safety nature.
Description
Technical Field
The utility model relates to a tunnel construction technical field especially relates to an advance little pipe reinforceing system in advance.
Background
With the advance of the modern construction process of the country, more and more tunnels are to be built, and the advance support technology for the tunnel with unfavorable geology is gradually improved. However, for the water-rich soft rock tunnel, the tunnel is rich in underground water, the strength of rock mass is very low, surrounding rock conditions are poor, collapse and other accidents easily occur in the construction process, so that the construction difficulty is greatly increased, the requirement on advanced pre-support of the tunnel is extremely high, and the safety and the construction progress of tunnel construction are directly related.
The advanced pre-reinforcement measure of the water-rich soft rock tunnel mainly comprises an advanced small conduit and an advanced pipe shed, and for the advanced small conduit, the method achieves the purpose of water stop consolidation, but the grouting reinforcement range is limited, and the safe construction cannot be effectively ensured; for the advanced pipe shed, the construction process requirement is high, the external inserting angle is not easy to control, the construction period is long, the construction cost is high, and the disturbance to surrounding rocks is large when the excavation is arranged due to the large diameter of the advanced pipe shed, so that the safety and the economy of construction in the initial stage are obviously reduced for the water-rich soft rock tunnel.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an advance little pipe reinforcerment system in advance to solve the problem that above-mentioned prior art exists, make the slip casting consolidate the area big, consolidate effectually, effectively consolidate loose rock mass, prevent that the tunnel from taking place the collapse, thereby improve country rock level and construction safety nature.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides an advance little pipe pre-reinforcement system, including advance little pipe, advance little pipe is provided with the bilayer along the tunnel full circumferencial direction, the bilayer includes inlayer and middle level, the inlayer with the middle level advance little pipe all evenly inserts along the tunnel circumferencial direction and establishes in rich water soft rock, the inlayer advance little pipe with the middle level advance little pipe all staggered arrangement, add in the 110-130 angle scope of the top pressure arch of tunnel and be equipped with outer advance little pipe, the outer advance little pipe of layer evenly inserts along the tunnel circumferencial direction and establishes in rich water soft rock, outer advance little pipe with the middle level advance little pipe all staggered arrangement, adjacent each layer advance little pipe horizontal projection's overlap joint length is 1.5-1.8m, the advanced small guide pipes are uniformly provided with grouting holes, the advanced small guide pipes are used for grouting slurry, and the end parts of the advanced small guide pipes are fixed on an arch center of the tunnel.
Preferably, the external insertion angles of the small advancing catheters of the outer layer are all 25 degrees, the external insertion angles of the small advancing catheters of the middle layer are all 15 degrees, and the external insertion angles of the small advancing catheters of the inner layer are all 10 degrees.
Preferably, the circumferential spacing of the small advancing conduits in the outer layer is 0.5m, the circumferential spacing of the small advancing conduits in the middle layer is 0.4m, and the circumferential spacing of the small advancing conduits in the inner layer is 0.35 m.
Preferably, the advanced small guide pipe is a seamless steel pipe, and the diameter of the advanced small guide pipe is
The length of leading little pipe is 5.2m, the most advanced long 0.2m of little pipe, the afterbody welding of leading little pipe has the ferrule, the ferrule welding is in on the bow member, the distance in the afterbody 1.5m scope of leading little pipe the leading little pipe is for only starching the section, only do not set up on the starching section the mud jacking hole.
Preferably, the diameter of the mud jacking hole is
The arrangement mode of the adjacent mud jacking holes is quincunx and is along the length direction of the advanced small catheterAnd the distance between every two adjacent grouting holes which are located on the same straight line is 15 cm.
The utility model discloses for prior art gain following technological effect:
the utility model discloses well elder generation is at the tunnel whole week within range adoption middle level and the double-deck advanced little pipe of inlayer, add in the 110-130 angle within range that the top pressure in tunnel encircles again and establish outer advanced little pipe, carry out the local reinforcement to the top that the pressure encircles, can avoid the waste of material, can play better reinforcement effect again, it is outer, the advanced little pipe staggered arrangement of middle level and inlayer three-layer altogether, cooperative work, thereby show increase slip casting reinforcement area, it is good to consolidate the effect, effectively consolidate loose rock mass, prevent that the tunnel from taking place to collapse, improve country rock grade and construction safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the advanced small duct pre-reinforcing system of the present invention;
FIG. 2 is a schematic structural view of a middle advanced small catheter according to the present invention;
wherein: 1-advanced small catheter, 2-seamless steel tube, 3-grouting hole, 4-tip, 5-pipe hoop, 6-tunnel, 7-pressure arch and 8-inverted arch.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Example one
As shown in fig. 1-2: the embodiment provides a pre-reinforcing system of an advanced small conduit 1, which comprises the advanced small conduit 1, wherein the advanced small conduit 1 is provided with double layers along the full circumferential direction of a tunnel 6, the double layers comprise an inner layer and a middle layer, the inner layer and the middle layer of the advanced small conduit 1 are uniformly inserted in water-rich soft rock along the circumferential direction of the tunnel 6, the inner layer of the advanced small conduit 1 and the middle layer of the advanced small conduit 1 are arranged in a staggered manner, an outer layer of the advanced small conduit 1 is additionally arranged in the angle range of 110-130 degrees of a top pressure arch 7 of the tunnel 6, specifically, the angle a marked in figure 1 is shown, the outer layer of the advanced small conduit 1 is uniformly inserted in the water-rich soft rock along the circumferential direction of the tunnel 6, the outer layer of the advanced small conduit 1 and the middle layer of the advanced small conduit 1 are arranged in a staggered manner, the overlapping length of the horizontal projection of the adjacent layers of the advanced small conduit 1 is 1.5-1.8, the leading small conduits 1 are used for grouting, and the ends of the leading small conduits 1 are fixed on an arch (a pressure arch 7 or an inverted arch 8) of the tunnel 6 to form a pre-support system. In this embodiment, the outer insertion angles of the outer layer of the small advanced catheters 1 are all 25 °, the outer insertion angles of the middle layer of the small advanced catheters 1 are all 15 °, and the outer insertion angles of the inner layer of the small advanced catheters 1 are all 10 °. The circumferential spacing of the leading small catheters 1 in the outer layer is 0.5m (as labeled D1 in figure 1), the circumferential spacing of the leading small catheters 1 in the middle layer is 0.4m (as labeled D2 in figure 1), the circumferential spacing of the leading small catheters 1 in the inner layer is 0.35m (as labeled D3 in figure 1), and the spacing between the adjacent leading small catheters 1 in different layers is D4, and D4 can be 0.35 m. Firstly, a middle-layer and an inner-layer double-layer advanced small guide pipe 1 is adopted in the whole circumference range of a tunnel 6, an outer-layer advanced small guide pipe 1 is additionally arranged in the angle range of 110-130 degrees of a top pressure arch 7 of the tunnel 6, and the advanced small guide pipes are arranged according to the requirements of the external insertion angle and the circumferential distance of each layer in the embodiment, thereby locally reinforcing the upper part of the pressure arch 7, effectively preventing the bottom of the tunnel 6 from water inrush accidents due to the double-layer arrangement of the inverted arch 8, improving the construction safety, avoiding the material waste, playing a better reinforcing effect, arranging the three layers of the advanced small conduits 1 on the outer layer, the middle layer and the inner layer in a staggered way and working cooperatively, thereby showing increase slip casting and consolidating the area, can effectual water shutoff stagnant water, consolidate effectually, effectively consolidate loose rock mass, prevent that tunnel 6 from taking place to collapse, improve country rock grade and construction safety nature.
The advanced small catheter 1 in the embodiment is preferably a seamless steel tube 2, and the diameter of the advanced small catheter 1 is
The length of the leading small catheter 1 is 5.2m, the length of the tip 4 of the leading small catheter 1 is 0.2m (as marked by L1 in figure 2), the tail part of the leading small catheter 1 is welded with a pipe hoop 5, and the pipe hoop 5 is composed of
The pipe hoop 5 is welded on the arch center, and the grout pressing hole 3 is not arranged on the advanced small pipe 1 within 1.5m from the tail part of the advanced small pipe 1 to form a grout stopping section. The diameter of the grouting hole 3 is
The adjacent grouting holes 3 are arranged in a quincunx manner, and the distance between the adjacent grouting holes 3 which are positioned on the same straight line along the length direction of the leading small guide pipe 1 is 15cm (as marked by L2 in figure 2).
Example two
As shown in fig. 1-2: the embodiment provides a construction method of a pre-reinforcing system of a small advanced catheter 1, which comprises the following steps:
s1, measuring and positioning the mounting holes according to the design scheme, and drilling and cleaning the mounting holes after positioning; in the step, the hole is drilled by using a pneumatic drill and adopting a slurry wall protection hole forming mode, so that hole collapse or hole diameter reduction is effectively prevented, and then the hole is cleaned by using high-pressure air;
s2, mounting the outer-layer small advanced catheter 1, and mounting the small advanced catheter 1 in the outer-layer mounting hole drilled in the step S1; replacing the drill rod drilled by the wind in the step S1 with a drill bit tail, and penetrating the leading small guide pipe 1 into the mounting hole;
s3, checking whether the installation quality of the outer-layer advanced small catheter 1 meets the requirement, and if not, repeating the steps S2-S3;
s4, sequentially installing the middle advanced small catheter 1 and the inner advanced small catheter 1, penetrating the advanced small catheter 1 into the installation hole by the same method as that in the step S2, checking whether the installation quality of the advanced small catheter 1 meets the quality requirement, and repeating the step if the installation quality of the advanced small catheter 1 does not meet the quality requirement;
s5, designing and preparing the slurry ratio according to the construction geology;
s6, performing double-control high-pressure grouting on the small advanced pipes 1 on the outer layer, the middle layer and the inner layer respectively, finishing grouting after the designed grouting amount or the designed grouting pressure is reached, and simultaneously plugging the pipe orifices of the small advanced pipes 1 by adopting a grout stop plug; in the step, the advanced small pipes 1 of the outer layer, the middle layer and the inner layer can be respectively subjected to layered group pipe grouting, the grouting pressure is 0.5-1.0MPa, so that the grouting efficiency is improved, the double-control high-pressure grouting is adopted, namely, the grouting is stopped when the grouting amount of each advanced small pipe 1 reaches the designed grouting amount, or the grouting is stopped when each advanced small pipe 1 reaches the designed grouting pressure, and the high-pressure grouting ensures that the grouting range can be more effectively expanded, so that the grouting reinforcement area is increased, and the reinforcement effect is improved;
and S7, checking the grouting effect in the step S6, if the grouting effect does not meet the quality requirement, performing grout supplementing, and if the grouting effect meets the quality requirement, adding a backing plate at the end part of the advanced small guide pipe 1 and welding the tail part of the advanced small guide pipe 1 on an arch.
In step S2 and step S4 of the further embodiment, the overlapped horizontal projection length of the leading small conduit 1 of the adjacent layer is required to be 1.5-1.8m, the length of the leading small conduit 1 penetrating into the installation hole is not shorter than 95% of the length of the leading small conduit 1, and at least 0.2m is reserved at the end of the leading small conduit 1 so as to add a backing plate and weld and fix the leading small conduit 1 with the arch frame, so as to fix the leading small conduit 1 better and form a pre-support system.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (5)
1. A advanced small catheter pre-reinforcement system, characterized by: the advanced small guide pipe comprises advanced small guide pipes, wherein double layers are arranged on the advanced small guide pipes along the whole circumferential direction of a tunnel, each double layer comprises an inner layer and a middle layer, the advanced small guide pipes on the inner layer and the middle layer are uniformly inserted into water-rich soft rock along the circumferential direction of the tunnel, the advanced small guide pipes on the inner layer and the advanced small guide pipes on the middle layer are arranged in a staggered manner, outer layers of the advanced small guide pipes are additionally arranged within the angle range of 110-130 degrees of a top pressure arch of the tunnel, the advanced small guide pipes on the outer layers are uniformly inserted into the water-rich soft rock along the circumferential direction of the tunnel, the advanced small guide pipes on the outer layers and the advanced small guide pipes on the middle layer are arranged in a staggered manner, the overlapping length of horizontal projections of the advanced small guide pipes on adjacent layers is 1.5-1.8m, grouting holes are uniformly arranged on the advanced small guide pipes, and the advanced small guide pipes are used for grouting slurry, the end parts of the small advancing pipes are fixed on an arch center of the tunnel.
2. The advanced ductus pre-consolidation system as set forth in claim 1, wherein: the external insertion angles of the small advanced catheters of the outer layer are all 25 degrees, the external insertion angles of the small advanced catheters of the middle layer are all 15 degrees, and the external insertion angles of the small advanced catheters of the inner layer are all 10 degrees.
3. The advanced ductus pre-consolidation system as set forth in claim 1, wherein: the circumferential spacing of the small advanced ducts on the outer layer is 0.5m, the circumferential spacing of the small advanced ducts on the middle layer is 0.4m, and the circumferential spacing of the small advanced ducts on the inner layer is 0.35 m.
4. The advanced ductus pre-consolidation system as set forth in claim 1, wherein: the advanced small catheter is a seamless steel tube, and the diameter of the advanced small catheter is
The length of leading little pipe is 5.2m, the most advanced long 0.2m of little pipe, the afterbody welding of leading little pipe has the ferrule, the ferrule welding is in on the bow member, the distance in the afterbody 1.5m scope of leading little pipe the leading little pipe is for only starching the section, only do not set up on the starching section the mud jacking hole.
5. The advanced ductus pre-consolidation system as set forth in claim 1, wherein: the diameter of the mud jacking hole is
The arrangement mode of the adjacent grouting holes is quincunx, and the distance between the adjacent grouting holes which are located on the same straight line along the length direction of the advanced small guide pipe is 15 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922122933.9U CN211342915U (en) | 2019-12-02 | 2019-12-02 | Pre-reinforcing system for advanced small catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922122933.9U CN211342915U (en) | 2019-12-02 | 2019-12-02 | Pre-reinforcing system for advanced small catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211342915U true CN211342915U (en) | 2020-08-25 |
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ID=72091663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922122933.9U Expired - Fee Related CN211342915U (en) | 2019-12-02 | 2019-12-02 | Pre-reinforcing system for advanced small catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211342915U (en) |
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2019
- 2019-12-02 CN CN201922122933.9U patent/CN211342915U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200825 |
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| CF01 | Termination of patent right due to non-payment of annual fee |