CN110985004A - Pre-reinforcing system for advanced small guide pipe and construction method thereof - Google Patents
Pre-reinforcing system for advanced small guide pipe and construction method thereof Download PDFInfo
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- CN110985004A CN110985004A CN201911214192.5A CN201911214192A CN110985004A CN 110985004 A CN110985004 A CN 110985004A CN 201911214192 A CN201911214192 A CN 201911214192A CN 110985004 A CN110985004 A CN 110985004A
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000011435 rock Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 239000011440 grout Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 238000007596 consolidation process Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 238000009955 starching Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims 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
- 238000005516 engineering process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a pre-reinforcing system for an advanced small conduit, which comprises the advanced small conduit, wherein the advanced small conduit is provided with double layers along the whole circumferential direction of a tunnel, each double layer comprises an inner layer and a middle layer, the advanced small conduits of the inner layer and the middle layer are uniformly inserted in water-rich soft rock along the circumferential direction of the tunnel, the advanced small conduits of the inner layer and the advanced small conduits of the middle layer are arranged in a staggered manner, an outer layer advanced small conduit is additionally arranged in the angle range of 110-130 degrees of a top pressure arch of the tunnel, the advanced small conduits of the outer layer are uniformly inserted in the water-rich soft rock along the circumferential direction of the tunnel, the outer layer advanced small conduits and the advanced small conduits of the middle layer are arranged in a staggered manner, grouting holes are uniformly arranged on the advanced small conduits, the advanced small conduits are used for grouting, and the end parts of the advanced small conduits are all fixed on. The invention has large grouting reinforcement area and good reinforcement effect, effectively reinforces the loose rock mass, and prevents the tunnel from collapsing, thereby improving the grade of the surrounding rock and the construction safety.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a pre-reinforcing system for an advanced small guide pipe and a construction method thereof.
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.
Disclosure of Invention
The invention aims to provide a pre-reinforcing system of a small advanced guide pipe and a construction method thereof, which are used for solving the problems in the prior art, so that the grouting reinforcement area is large, the reinforcement effect is good, loose rock bodies are effectively reinforced, the tunnel is prevented from collapsing, and the grade of surrounding rocks and the construction safety are improved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a pre-reinforcing system for an advanced small conduit, which comprises the advanced small conduit, wherein the advanced small conduit is provided with double layers along the whole circumferential direction of a tunnel, the double layers comprise an inner layer and a middle layer, the advanced small conduits of the inner layer and the middle layer are uniformly inserted in water-rich soft rock along the circumferential direction of the tunnel, the advanced small conduits of the inner layer and the advanced small conduits of the middle layer are arranged in a staggered manner, an outer layer of the advanced small conduit is additionally arranged within the angle range of 110-130 degrees of a top pressure arch of the tunnel, the advanced small conduit of the outer layer is uniformly inserted in the water-rich soft rock along the circumferential direction of the tunnel, the advanced small conduits of the outer layer and the advanced small conduits of the middle layer are arranged in a staggered manner, the overlapping length of the horizontal projection of the advanced small conduits of adjacent layers 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 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.
The invention also provides a construction method of the advanced small conduit pre-reinforcing system, 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;
s2, installing an outer layer of small advanced guide pipe, and installing the small advanced guide pipe in the installation hole of the outer layer drilled in the step S1;
s3, checking whether the installation quality of the small advanced catheter on the outer layer meets the requirement, and if not, repeating the steps S2-S3;
s4, sequentially installing the advanced small catheter at the middle layer and the advanced small catheter at the inner layer, checking whether the installation quality of the advanced small catheter meets the quality requirement, and repeating the step if the installation quality of the advanced small catheter 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 of 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 by adopting a grout stop plug;
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 and welding the tail part of the advanced small guide pipe on an arch frame.
Preferably, in step S1, a hole is drilled by using a pneumatic drill and a mud wall protection hole forming method, and then the hole is cleaned by using high-pressure air.
Preferably, in steps S2 and S4, the drill rod of the air drill is changed to a drill bit, and the small guide pipe is inserted into the installation hole.
Preferably, in steps S2 and S4, the overlapping length of the horizontal projection of the small advanced guide pipe of the adjacent layer is 1.5-1.8m, the length of the small advanced guide pipe penetrating into the installation hole is not shorter than 95% of the length of the small advanced guide pipe, and the end of the small advanced guide pipe is reserved for at least 0.2 m.
Preferably, in step S6, the leading small conduits in the outer layer, the middle layer and the inner layer are subjected to layered group pipe grouting respectively, and the grouting pressure is 0.5-1.0 MPa.
Compared with the prior art, the invention has the following technical effects:
according to the invention, the middle-layer and inner-layer double-layer advanced small guide pipes are adopted in the whole circumference range of the tunnel, the outer-layer advanced small guide pipe is additionally arranged in the angle range of 110-130 degrees of the top pressure arch of the tunnel, the local reinforcement is carried out above the pressure arch, the waste of materials can be avoided, and a better reinforcement effect can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a pre-reinforcing system for a small guide tube according to the present invention;
FIG. 2 is a schematic view of the structure of the advanced small catheter of 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 clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
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 overlapping length of the horizontal projection 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 a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
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.
6. A construction method of an advanced small conduit pre-reinforcing system is characterized by comprising the following steps: the method 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;
s2, installing an outer layer of small advanced guide pipe, and installing the small advanced guide pipe in the installation hole of the outer layer drilled in the step S1;
s3, checking whether the installation quality of the small advanced catheter on the outer layer meets the requirement, and if not, repeating the steps S2-S3;
s4, sequentially installing the advanced small catheter at the middle layer and the advanced small catheter at the inner layer, checking whether the installation quality of the advanced small catheter meets the quality requirement, and repeating the step if the installation quality of the advanced small catheter 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 of 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 by adopting a grout stop plug;
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 and welding the tail part of the advanced small guide pipe on an arch frame.
7. The construction method of the advanced small duct pre-reinforcement system as claimed in claim 6, wherein: and in the step S1, drilling holes by using an air drill and a mud wall protection hole forming mode, and cleaning the holes by using high-pressure air.
8. The construction method of the advanced small duct pre-reinforcement system as claimed in claim 7, wherein: in steps S2 and S4, the drill rod of the air drill is changed into a drill bit tail, and the small advanced guide pipe is inserted into the mounting hole.
9. The construction method of the advanced small duct pre-reinforcement system as claimed in claim 6, wherein: in the steps S2 and S4, the overlapping length of the horizontal projection of the small advanced guide pipe of the adjacent layer is 1.5-1.8m, the length of the small advanced guide pipe penetrating into the mounting hole is not shorter than 95% of the length of the small advanced guide pipe, and the end part of the small advanced guide pipe is reserved for at least 0.2 m.
10. The construction method of the advanced small duct pre-reinforcement system as claimed in claim 6, wherein: in step S6, the advanced small catheters in the outer layer, the middle layer and the inner layer are subjected to layered group pipe grouting respectively, and the grouting pressures are all 0.5-1.0 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911214192.5A CN110985004A (en) | 2019-12-02 | 2019-12-02 | Pre-reinforcing system for advanced small guide pipe and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911214192.5A CN110985004A (en) | 2019-12-02 | 2019-12-02 | Pre-reinforcing system for advanced small guide pipe and construction method thereof |
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| CN110985004A true CN110985004A (en) | 2020-04-10 |
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| CN201911214192.5A Pending CN110985004A (en) | 2019-12-02 | 2019-12-02 | Pre-reinforcing system for advanced small guide pipe and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253185A (en) * | 2020-10-21 | 2021-01-22 | 福建江夏学院 | Protection mechanism for water-rich sand fault tunnel and construction method |
| CN113700490A (en) * | 2021-09-17 | 2021-11-26 | 哈尔滨工业大学 | Integrated freezing injury-water injury prevention and control method for tunnel construction and maintenance |
| CN113847038A (en) * | 2021-09-18 | 2021-12-28 | 中电建铁路建设投资集团有限公司 | Single-row steel pipe advanced grouting reinforcement method |
| CN114458355A (en) * | 2022-01-17 | 2022-05-10 | 西南交通大学 | Method for directionally reinforcing advanced small conduits with different large deformation grades under longitudinal bedding |
-
2019
- 2019-12-02 CN CN201911214192.5A patent/CN110985004A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253185A (en) * | 2020-10-21 | 2021-01-22 | 福建江夏学院 | Protection mechanism for water-rich sand fault tunnel and construction method |
| CN113700490A (en) * | 2021-09-17 | 2021-11-26 | 哈尔滨工业大学 | Integrated freezing injury-water injury prevention and control method for tunnel construction and maintenance |
| CN113847038A (en) * | 2021-09-18 | 2021-12-28 | 中电建铁路建设投资集团有限公司 | Single-row steel pipe advanced grouting reinforcement method |
| CN113847038B (en) * | 2021-09-18 | 2024-04-02 | 中电建铁路建设投资集团有限公司 | Single-row steel pipe advanced grouting reinforcement method |
| CN114458355A (en) * | 2022-01-17 | 2022-05-10 | 西南交通大学 | Method for directionally reinforcing advanced small conduits with different large deformation grades under longitudinal bedding |
| CN114458355B (en) * | 2022-01-17 | 2023-02-28 | 西南交通大学 | Method for directionally reinforcing advanced small conduits with different large deformation grades under longitudinal bedding |
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