CN110714786A - High polymer grouting method for shield tunnel and shield tunnel - Google Patents
High polymer grouting method for shield tunnel and shield tunnel Download PDFInfo
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- CN110714786A CN110714786A CN201911028614.XA CN201911028614A CN110714786A CN 110714786 A CN110714786 A CN 110714786A CN 201911028614 A CN201911028614 A CN 201911028614A CN 110714786 A CN110714786 A CN 110714786A
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- grouting
- pipe
- tunnel
- void area
- high polymer
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The invention discloses a shield tunnel high polymer grouting method and a shield tunnel, wherein the shield tunnel high polymer grouting method comprises the following steps: s1: when the tunnel body is built, a void area is reserved along the circumferential surface of the tunnel body, and a grouting hole is formed in the tunnel body and extends from the inside of the tunnel body to the void area; s2: placing a grouting pipe in the grouting hole, wherein the grouting pipe extends from the interior of the tunnel body to the void area; s3: and (3) grouting, namely injecting at least two liquid high polymers into the void area through a grouting pipe, wherein each high polymer is expanded and solidified into a solid state after reacting in the void area and filling the void area. The adoption of various high polymers for reaction expansion and filling of the void area can effectively prevent vibration and seepage of the shield tunnel, and the subsequent maintenance is very convenient. The invention is applied to the technical field of tunnels.
Description
Technical Field
The invention relates to a tunnel protection technology, in particular to a shield tunnel high polymer grouting method and a shield tunnel.
Background
The tunnel body belongs to a hidden underground project, and due to the fact that the geological conditions of the project in China are extremely complex, the tunnel body often passes through a high-intensity earthquake area in the construction process, and is often subjected to special geological environments such as silt, soft soil, underground rivers, quicksand and the like. Under the action of earthquake load, the joints of the tunnel and ventilation shafts, vertical shafts, communication channels and the like, the joints of different materials of the tunnel lining structure and the positions of the tunnel passing through the surrounding rock with larger grade difference belong to the weak positions of the tunnel structure. Once severe earthquake occurs, the tunnel structure is seriously damaged, and the pipe piece connecting section is dislocated to cause disasters such as water leakage and the like, so that great economic loss and life safety are caused.
The traditional seismic isolation and reduction of the tunnel generally takes three aspects into consideration: firstly, the surrounding rock is reinforced, so that the deformation of soil around the tunnel structure is reduced, and the stability of the structure is protected; the self anti-seismic performance of the duct piece is improved, such as the structural rigidity is increased, the thickness of the duct piece is reduced, the material of the duct piece is changed, and the like; and thirdly, the interaction between the surrounding rock and the tunnel structure is reduced. Reduce the interact between country rock and tunnel structure, the stress that the structure produced when reducing the earthquake emergence is absorbed through setting up flexible damping device usually, concentrates damping device department with main deformation, reduces the deformation of other section of jurisdiction junctions, and the measure of relatively using commonly has: install special stagnant water rubber and can take place the damping device of big deformation, this kind of measure mainly is used for increasing along between tunnel longitudinal structure and structure, the allowable deformation and the displacement of tunnel cross section, reduces the deformation of the volume of opening between the tube coupling and lining cutting structure, the safety of protection tunnel lining cutting structure and play waterproof effect, concrete shock insulation waterproof measure has: a resettable shock-absorbing water stop, an SMA shape memory alloy stranded wire bundle flexible shock-absorbing device and a steel pipe sheet SMA shape memory alloy flexible shock-absorbing device are based on the basic principle that a memory alloy is an alloy material with superelasticity and restorable properties, and energy caused by earthquake load is consumed and absorbed through a formed hysteresis curve within a strain range where the material can be restored. In addition to the arrangement of the flexible shock absorption device, another effective measure is that a layer of elastic material with flexible energy absorption function is added between the tunnel lining structure and the surrounding rock to isolate and reduce the effect of soil on the tunnel under the action of earthquake load. The silica gel belongs to a flexible material, has better heat resistance and cold resistance than common rubber, but has poor chemical corrosion resistance; the rubber material is easy to age and is a temperature sensitive material, and the original material characteristics are difficult to keep under severe natural environment and complex stress environment, so that the anti-seismic performance and the waterproof performance are lost; the asphalt material has high density, poor ductility and unobvious energy dissipation and vibration reduction performance.
The above method cannot effectively solve the problems of shock resistance and seepage resistance at the same time.
Patent document CN102140919A discloses a grouting method for tunnel protection polymer. The method aims at the situation that a dissolution cavity exists in tunnel surrounding rocks or a cavity caused by tunnel collapse is formed, high polymer materials are injected to the periphery of a tunnel lining structure, the materials rapidly expand in volume after reaction, and a high polymer buffer layer is formed at the cavity part of the periphery of the lining structure, so that the aim of preventing rock mass above the tunnel from falling to impact the tunnel lining is fulfilled.
The solution in this patent document is an improvement to the above technical problem, but it does not suggest any technique on how to perform grouting, and how to repair the high polymer of the tunnel in the subsequent use.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of providing a shield tunnel polymer grouting method and a shield tunnel, which adopt a plurality of polymers to react and expand and fill a void area, can effectively resist shock and seepage of the shield tunnel, and is very convenient for subsequent maintenance and the like.
(II) technical scheme
In order to solve the technical problem, the invention provides a shield tunnel high polymer grouting method, which comprises the following steps:
s1: when the tunnel body is built, a void area is reserved along the circumferential surface of the tunnel body, and a grouting hole is formed in the tunnel body and extends from the inside of the tunnel body to the void area;
s2: placing a grouting pipe in the grouting hole, wherein the grouting pipe extends from the interior of the tunnel body to the void area;
s3: and (3) grouting, namely injecting at least two liquid high polymers into the void area through a grouting pipe, wherein each high polymer is expanded and solidified into a solid state after reacting in the void area and filling the void area.
The tunnel body is formed by sequentially connecting a plurality of sections of pipelines;
in the step S1, a plurality of grouting holes are built along the circumferential direction of each section of pipeline, the grouting holes are evenly distributed along the circumferential direction of the pipeline, and in the step S2, grouting pipes are respectively placed in each grouting hole.
In a further improvement, in step S3, grouting is performed along the pipeline from bottom to top.
Further improving, when the grouting amount is reached and the adjacent grouting holes emit high polymers, grouting the grouting pipe in the next grouting hole; and the grouting quantity m is rho (L B delta R), wherein rho is the density of the high polymer, L is the arc length of the pipe piece, B is the arc width of the pipe piece, and delta R is the thickness of the void area.
In a further improvement, the grouting holes are symmetrically arranged on the pipeline along the vertical direction, and in step S3, grouting is synchronously performed along two symmetrical sides of the pipeline from bottom to top.
Further improvement, in step S2, after installing the grouting pipe, installing a grouting cap at one end of the grouting pipe located at the tunnel body;
in step S3, the injection gun and the slip casting cap are fixed by a clamp, and then the liquid high polymer is injected into the void region by the injection gun.
In a further improvement, the part of the grouting pipe extending to the void area forms a plurality of branches, and each branch extends along different directions.
In a further improvement, in step S3, after the grouting is completed, the grouting pipe is closed.
Further improved, the pipe diameter of the grouting pipe is 1 cm-2 cm.
The invention also discloses a shield tunnel, which adopts the following technical scheme:
a shield tunnel is constructed by adopting the shield tunnel high polymer grouting method when a tunnel body is constructed.
Concretely, a shield tunnel, including the tunnel body, the tunnel body overcoat is equipped with the inoxidizing coating, it is regional to form the evacuation between inoxidizing coating and the tunnel body, be equipped with the injected hole on the tunnel body, the injected hole extends to the evacuation region from the tunnel body is inside, the evacuation region intussuseption is filled with the stopping of being mixed by two at least kinds of high polymers.
The tunnel body comprises a plurality of sections of pipelines, the pipelines are sequentially communicated, a plurality of grouting holes are formed in the circumferential direction of the pipelines, and the grouting holes are evenly distributed in the circumferential direction of the pipelines.
In a further improvement, a grouting pipe is inserted in the grouting hole.
Further improve, the slip casting cap is equipped with to the one end that the slip casting pipe is located the tunnel body.
In a further improvement, the part of the grouting pipe extending to the void area forms a plurality of branches, and each branch extends along different directions.
Further improved, the pipe diameter of the grouting pipe is 1 cm-2 cm.
The improvement is further that one end of the grouting pipe, which is positioned on the tunnel body, is provided with a detachable grouting plug.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
when the tunnel body is built, a void area is reserved along the circumferential surface of the tunnel body, at least two high polymers are injected into the void area through the grouting pipe, and the high polymers react, expand and solidify in the void area to form a solid state and fill the void area.
The invention is convenient to be grouted by the grouting pipe, and if the high polymer in the void area is damaged or a gap is formed in the subsequent use process of the tunnel body, the high polymer can still be grouted again by the grouting pipe for repairing, so that the grouting and repairing by adopting the method of the invention are very convenient.
The shield tunnel constructed by the grouting method has the following advantages:
(1) effectively preventing structural damage and water leakage. The problems of tunnel lining structure damage and water leakage can be effectively prevented and treated.
(2) The density and rigidity are controllable. The density and rigidity parameters of the high polymer material can be adjusted according to the needs, the ductility and the seepage-proofing performance of the material are ensured, and the requirements of different engineering on the earthquake-proof grade and the seepage-proofing grade are met.
(3) The cost is low. Compared with the traditional maintenance scheme, the method can save the manufacturing cost by more than 60 percent.
(4) And is small for the surrounding environment. Can carry out the slip casting operation through the slip casting hole, it is little to surrounding environment and structure self influence.
(5) Simple process, quick construction and no need of maintenance. The grouting operation is simple, the construction is fast, the strength of about 90% can be formed after the material reacts for 15 minutes, the maintenance is not needed, and the construction period is saved by more than 70%.
(6) The construction is convenient. The equipment that the high polymer slip casting adopted is adapted to different places, and the slip casting can adopt portable slip casting equipment to get into the tunnel and be under construction.
(7) The durability is good. The invention can adopt non-aqueous reaction type high polymer material, has stable performance and good resistance to chemical solvent corrosion after being buried underground for a long time.
Drawings
FIG. 1 is an axial cross-sectional view of a tunnel body;
figure 2 is a radial cross-sectional view of the tunnel body;
FIG. 3 is a schematic view of the initiation of grouting in the tunnel body;
FIG. 4 is a schematic structural view of a half-grouting in a tunnel body;
fig. 5 is a schematic structural view of the point when grouting in the tunnel body is completed.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 5, a method for grouting polymer in a shield tunnel includes the following steps:
s1: when the tunnel body 1 is built, a void area 2 is reserved along the circumferential surface of the tunnel body 1, a grouting hole 3 is built in the tunnel body 1, and the grouting hole 3 extends from the inside of the tunnel body 1 to the void area 2; the grouting holes 3 may also be reserved before the tunnel body 1.
S2: placing a grouting pipe 4 in the grouting hole 3, wherein the grouting pipe 4 extends from the inside of the tunnel body 1 to the void area 2;
s3: and (3) grouting, namely injecting at least two liquid high polymers into the void area 2 through a grouting pipe 4, wherein each high polymer is expanded and solidified into a solid state after reacting in the void area 2 and fills the void area 2. The high polymer component can adopt a double-slurry quick-setting high polymer repairing material for underground pipelines and the high polymer in the preparation method thereof disclosed by the patent document with the application number of 201910008825.0. For example, in this embodiment, the polymer that can be used includes a main agent and a curing agent, and the main agent and the curing agent are respectively injected into the void area, and react in the void area to expand and solidify into a solid state, so that the void area can be filled up.
In this embodiment, the tunnel body 1 is formed by sequentially connecting a plurality of sections of pipelines 11; the duct 11 is composed of a plurality of segments, and the plurality of segments form a sleeve-shaped duct 11.
In step S1, a plurality of grouting holes 3 are formed along the circumferential direction of each section of pipeline 11, in step S, grouting pipes 4 are respectively placed in each grouting hole 3, and the grouting holes 3 are uniformly distributed along the circumferential direction of the pipeline 11. Set up a plurality of injected holes 3, can follow the slip casting pipe 4 in each injected hole 3 toward taking off the space 2 in the slip casting, make the high polymer can be more abundant with taking off the space 2 packing.
In this embodiment, in step S3, grouting is performed along the pipe 11 from bottom to top. Because the high polymer is in a liquid state when just injected, the grouting is started from the lower part, so that the high polymer can more fully fill the void area 2.
In this embodiment, when the grouting amount is reached and a polymer emerges from the adjacent grouting holes 3, grouting is performed on the grouting pipe 4 in the next grouting hole 3; and the grouting quantity m is rho (L B delta R), wherein rho is the density of the high polymer, L is the arc length of the pipe piece, B is the arc width of the pipe piece, and delta R is the thickness of the void area.
In this embodiment, the grouting holes 3 are symmetrically arranged on the pipeline 11 in the vertical direction, and in step S3, grouting is performed synchronously along two symmetrical sides of the pipeline 11 from bottom to top. Synchronous slip casting in pipeline 11 both sides can make pipeline 11 both sides slip casting more even.
In this embodiment, in step S2, after the grouting pipe 4 is installed, a grouting cap is installed at one end of the grouting pipe 4 located at the tunnel body 1;
in step S3, the injection gun and the slip casting cap are fixed by a jig, and then the liquid high polymer is injected into the void region 2 by the injection gun. The grouting cap has a guiding function and can guide the high polymer in the injection gun into the grouting pipe 4.
In this embodiment, the portion of the grouting pipe 4 extending to the void region 2 forms a plurality of branches, and each branch extends in a different direction. Firstly, can improve the efficiency of slip casting, secondly can make the slip casting more even, the hole can not appear.
In this embodiment, in step S3, after the completion of the grouting, the grouting pipe 4 is closed. Preventing the grouting pipe 4 from being blocked when the follow-up needs to be performed.
In this embodiment, the pipe diameter of the grouting pipe 4 is 1 cm-2 cm. Preferably, the diameter of the grouting pipe 4 is 1.6 cm. A 1.6cm long rubber sheath or PVC pipe.
A shield tunnel is constructed by adopting the shield tunnel high polymer grouting method when a tunnel body 1 is constructed.
Concretely, a shield tunnel, including tunnel body 1, 1 overcoat in tunnel body is equipped with inoxidizing coating 101, it takes off empty regional 2 to form between inoxidizing coating 101 and the tunnel body 1, be equipped with injected hole 3 on the tunnel body 1, injected hole 3 extends to taking off empty regional 2 from tunnel body 1 is inside, it has the stopping of being mixed by two at least kinds of high polymers to take off empty regional 2 intussuseption. The high polymer component can adopt a double-slurry quick-setting high polymer repairing material for underground pipelines and the high polymer in the preparation method thereof disclosed by the patent document with the application number of 201910008825.0. For example, in this embodiment, the polymer that can be used includes a main agent and a curing agent, and the main agent and the curing agent are respectively injected into the void area, and react in the void area to expand and solidify into a solid state, so that the void area can be filled up.
In this embodiment, the tunnel body 1 includes a plurality of sections of pipelines 11, each pipeline 11 is sequentially communicated, a plurality of grouting holes 3 are arranged along the circumferential direction of the pipeline 11, and each grouting hole 3 is uniformly distributed along the circumferential direction of the pipeline 11. The duct 11 is composed of a plurality of segments, and the plurality of segments form a sleeve-shaped duct 11.
In this embodiment, the grouting holes 3 are inserted with grouting pipes 4, and the grouting holes 3 are uniformly distributed along the circumferential direction of the pipeline 11.
In this embodiment, the grouting pipe 4 is provided with a grouting cap at one end of the tunnel body 1. The grouting cap has a guiding function and can guide the high polymer in the injection gun into the grouting pipe 4.
In this embodiment, the portion of the grouting pipe 4 extending to the void region 2 forms a plurality of branches, and each branch extends in a different direction. Firstly, can improve the efficiency of slip casting, secondly can make the slip casting more even, the hole can not appear.
In this embodiment, the pipe diameter of the grouting pipe 4 is 1 cm-2 cm. Preferably, the diameter of the grouting pipe 4 is 1.6 cm. A 1.6cm long rubber sheath or PVC pipe.
In this embodiment, the slip casting pipe 4 is equipped with detachable slip casting stopper on one end that is located tunnel body 1. Preventing the grouting pipe 4 from being blocked when the follow-up needs to be performed.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high polymer grouting method for a shield tunnel is characterized by comprising the following steps:
s1: when the tunnel body is built, a void area is reserved along the circumferential surface of the tunnel body, and a grouting hole is formed in the tunnel body and extends from the inside of the tunnel body to the void area;
s2: placing a grouting pipe in the grouting hole, wherein the grouting pipe extends from the interior of the tunnel body to the void area;
s3: and (3) grouting, namely injecting at least two liquid high polymers into the void area through a grouting pipe, wherein each high polymer is expanded and solidified into a solid state after reacting in the void area and filling the void area.
2. The method of claim 1, wherein the tunnel body is formed by connecting a plurality of sections of pipes in sequence;
in the step S1, a plurality of grouting holes are built along the circumferential direction of each section of pipeline, the grouting holes are evenly distributed along the circumferential direction of the pipeline, and in the step S2, grouting pipes are respectively placed in each grouting hole.
3. The method of claim 2, wherein the grouting is performed along the pipe from bottom to top in step S3.
4. The method for grouting polymer in a shield tunnel according to claim 3, characterized in that when the grouting amount is reached and polymer is blown out from the adjacent grouting holes, the grouting pipe in the next grouting hole is grouted; and the grouting quantity m is rho (L B delta R), wherein rho is the density of the high polymer, L is the arc length of the pipe piece, B is the arc width of the pipe piece, and delta R is the thickness of the void area.
5. The method for grouting polymer in a shield tunnel according to claim 3, wherein the grouting holes are symmetrically arranged on the pipeline in the vertical direction, and in step S3, grouting is performed simultaneously from bottom to top along the two symmetrical sides of the pipeline.
6. The method for grouting high polymer in a shield tunnel according to claim 1, wherein in step S2, after the grouting pipe is installed, a grouting cap is installed at one end of the grouting pipe located at the tunnel body;
in step S3, the injection gun and the slip casting cap are fixed by a clamp, and then the liquid high polymer is injected into the void region by the injection gun.
7. The method of claim 1, wherein the portion of the injection pipe extending to the void region forms a plurality of branches, each branch extending in a different direction.
8. The method for grouting high polymer in a shield tunnel according to claim 1, wherein in step S3, after grouting, the grouting pipe is closed.
9. The method for grouting high polymer in a shield tunnel according to claim 1, wherein the diameter of the grouting pipe is 1 cm-2 cm.
10. A shield tunnel constructed by the method of injecting polymer into a shield tunnel according to any one of claims 1 to 9 when constructing a tunnel body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911028614.XA CN110714786A (en) | 2019-10-28 | 2019-10-28 | High polymer grouting method for shield tunnel and shield tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911028614.XA CN110714786A (en) | 2019-10-28 | 2019-10-28 | High polymer grouting method for shield tunnel and shield tunnel |
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| CN201911028614.XA Pending CN110714786A (en) | 2019-10-28 | 2019-10-28 | High polymer grouting method for shield tunnel and shield tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145189A (en) * | 2020-10-24 | 2020-12-29 | 中铁一局集团有限公司 | Novel duct piece grouting reinforcement method for soft soil area |
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