CN211448700U - Shield tunnel instant quick-setting type synchronous grouting system and quick-setting agent capsule - Google Patents
Shield tunnel instant quick-setting type synchronous grouting system and quick-setting agent capsule Download PDFInfo
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- CN211448700U CN211448700U CN201921627545.XU CN201921627545U CN211448700U CN 211448700 U CN211448700 U CN 211448700U CN 201921627545 U CN201921627545 U CN 201921627545U CN 211448700 U CN211448700 U CN 211448700U
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Abstract
The utility model discloses a shield tunnel instant quick-dissolving quick-setting type synchronous grouting system and an accelerator capsule, which comprises an accelerator capsule, a synchronous grouting pipeline of a shield machine and an additive grouting pipeline, the accelerator capsule is formed by encapsulating an accelerator with a water-soluble encapsulating material, the additive grouting pipeline is communicated with the synchronous grouting pipeline, the method comprises the steps of doping an accelerator capsule in synchronous grouting slurry of a synchronous grouting pipeline through an additive grouting pipeline, injecting the synchronous grouting slurry doped with the accelerator capsule into a space between a soil body and a pipe piece, dissolving a water-soluble material of the accelerator capsule, releasing an accelerator, reacting the accelerator with the synchronous grouting slurry, locally and rapidly generating a reinforced coagulation block, rapidly providing support between the soil body and the pipe piece by the local reinforced coagulation block, inhibiting buoyancy generated by a tunnel section which is not solidified by synchronous grouting, and controlling deformation of a tunnel pipe piece structure.
Description
Technical Field
The utility model relates to a shield tunnel instant quick setting type synchronous slip casting system and accelerator capsule are applicable to the shield tunnel slip casting, are particularly suitable for in the anti section that floats control ten minutes rigorously in the tunnel, adopt the tunnel that the synchronous slip casting of single liquid thick liquid shield constructs the construction.
Background
The shield method is a mainstream construction method for building urban tunnels and is widely popularized due to the advantages of small influence on the earth surface and controllable risk. In the construction of the city by adopting a shield method, the first relief is to control the surface subsidence and the structural stability in the construction period, and the two are closely related to the quality of synchronous grouting. Generally, synchronous grouting comprises single-fluid grouting and double-fluid grouting, and has advantages and disadvantages.
Single-liquid slurry: the method has the advantages of good stability and durability, but long coagulation time, possibility of causing blocking of a grouting pipe and consolidation of the shield brush by the slurry when short coagulation is prepared, and huge risk. Therefore, the tunnel structure is in the uncoagulated slurry for a long time, the buoyancy can cause the shearing stress of the tunnel, and the tunnel structure can be damaged in severe cases. Particularly, when the tunnel is constructed in a rock stratum, due to the self-supporting effect of surrounding rocks, the load cannot be effective in time, the tunnel floats seriously, and the cracking of the tunnel structure is common. Fig. 1 is a schematic diagram of synchronous grouting of a current shield tunnel.
Double-liquid slurry: the method has the advantages that a large amount of water glass is used, the slurry is quickly condensed, the tunnel overexcavation gap can be rapidly filled with materials with certain strength, the ground surface settlement is small, and the tunnel upward floating control is good. However, the durability of the large-scale use is poor, and sometimes the brush returns to the tail of the reflux shield to damage the tail of the shield, so that unacceptable risks are caused, and some domestic industries prohibit the use of the brush.
Disclosure of Invention
An object of the utility model is to provide a shield tunnel instant quick setting type synchronous slip casting system and accelerator capsule, this system can be under the prerequisite that does not influence shield machine shield tail sealing function, through pour into the accelerator that adopts the encapsulation of water-soluble packaging material into in the synchronous slip casting liquid into, realize the local quick setting of synchronous slip casting to reduce the buoyancy of deviating from the shield section of jurisdiction, reduce the tunnel and produce destruction because buoyancy.
The utility model discloses a realize like this: the utility model discloses a shield tunnel instant quick-dissolving quick-setting type synchronous grouting system, which comprises a quick-setting agent capsule, a synchronous grouting pipeline of a shield machine and an additive grouting pipeline, the accelerator capsule is formed by encapsulating an accelerator with a water-soluble encapsulating material, the additive grouting pipeline is communicated with the synchronous grouting pipeline, the method is characterized in that an accelerator capsule is doped into synchronous grouting slurry of a synchronous grouting pipeline through an additive grouting pipeline, the synchronous grouting pipeline injects the synchronous grouting slurry doped with the accelerator capsule into a space between a soil body and a pipe piece, a water-soluble material of the accelerator capsule is dissolved to release the accelerator, the accelerator reacts with the synchronous grouting slurry, a reinforced coagulation block is locally and rapidly generated, the local reinforced coagulation block rapidly provides support between the soil body and the pipe piece, buoyancy generated by a tunnel section which is not solidified in synchronous grouting is inhibited, and deformation of a tunnel pipe piece structure is controlled.
Furthermore, a valve is arranged on the additive grouting pipeline.
Further, the shape of the accelerator capsule is spherical or ellipsoidal.
Further, the water-soluble packaging material of the accelerating agent capsule adopts water-soluble plastics or resin; the accelerating agent adopts water glass or other rapid reaction strengthening reinforcing materials.
Furthermore, the accelerating agent capsule adopts two independent bins for respectively encapsulating two different self-reacting accelerating agent materials.
Further, an accelerator material is encapsulated in the accelerator capsule.
Furthermore, the synchronous grouting pipeline is communicated with the additive grouting pipeline through a tee joint.
The system also comprises a conveying device and an air compression device, wherein the air compression device is used for providing conveying power for the accelerator capsule.
The system also comprises an additive grouting pump which is used for providing conveying power for the cement slurry doped with the accelerator capsule.
The utility model discloses an accelerator capsule, accelerator capsule is formed by water-soluble packaging material encapsulation accelerator. The shape of the accelerating agent capsule is spherical or ellipsoidal; the water-soluble packaging material of the accelerator capsule adopts water-soluble plastics or resin; the accelerating agent adopts water glass or other rapid reaction strengthening reinforcing materials.
The utility model discloses a shield tunnel instant quick setting type synchronous grouting method, including following step:
1) the accelerator is packaged by a water-soluble packaging material;
2) in the tunneling process of the shield tunneling machine, injecting an accelerator packaged by a water-soluble packaging material into the synchronous grouting liquid;
3) the synchronous grouting slurry doped with the accelerator packaged by the water-soluble packaging material is injected into a space between a soil body and a pipe piece, after a period of time, the water-soluble material of the packaging accelerator is dissolved, the accelerator is released, the accelerator reacts with the synchronous grouting slurry, the local part of the accelerator rapidly generates a reinforced coagulation block, the local reinforced coagulation block rapidly provides support between the soil body and the pipe piece, the buoyancy generated by a tunnel section which is not solidified by synchronous grouting is restrained, and the deformation of a tunnel pipe piece structure is controlled.
Further, the accelerator is sealed into a capsule type by a water-soluble packaging material, and the water-soluble time of the capsule is controlled by adjusting the thickness and the material of the capsule for packaging the accelerator.
Furthermore, the size of the capsule for encapsulating the accelerator meets the fluidity requirement of the grouting pipeline of the shield tunneling machine; the capsule shape of the encapsulated accelerating agent is spherical or ellipsoidal.
Further, a water-soluble plastic or resin is used as the water-soluble encapsulating material.
Furthermore, the capsule for encapsulating the accelerator is provided with two independent bins for encapsulating two different accelerator materials capable of reacting automatically respectively.
The two different self-reactive accelerating agents can be water glass and calcium chloride solution, and the two solutions react rapidly to generate silica gel and calcium silicate gel, so that the functions of cementing and filling pores are achieved, and the strength and the bearing capacity of the soil are improved. It is commonly used for foundation reinforcement of silt, sandy soil and filling soil, and is called double-liquid grouting. The two materials can be respectively packaged in two capsules, the two materials can also be packaged by adopting one capsule, of course, calcium chloride can also be added into the synchronous grouting material, and the capsule only releases water glass, and the like. The utility model discloses be not limited to above-mentioned two kinds of materials, also can study other similar materials.
Further, an accelerator material is encapsulated in the accelerator encapsulating capsule.
Furthermore, an additive grouting pipeline is additionally arranged to be communicated with a synchronous grouting pipeline of the shield tunneling machine, and a valve is arranged on the additive grouting pipeline; the accelerator which is encapsulated by the water-soluble encapsulating material is locally or quantitatively mixed in the single-fluid slurry through an additive grouting pipeline and a valve.
The accelerator encapsulated by the water-soluble encapsulating material can be pressed in by air pressure or participate in the pressing in of cement paste, but the flowing time of the accelerator encapsulated by the water-soluble encapsulating material in a pipeline is counted in the water-soluble time control of the capsule.
Further, the synchronous grouting liquid is single-liquid slurry.
Further, the accelerator includes, but is not limited to, water glass or other fast-reacting reinforcing materials. The accelerator commonly used in engineering is water glass, which reacts with calcium chloride added to concrete to produce silica gel and calcium silicate gel.
Compared with the prior art, the utility model has the advantages that: the utility model discloses combine the different advantages and disadvantages of single, two liquid thick liquids, plan to carry out following improvement to the constitution and the technology of single liquid thick liquid:
1. combining the thought of the double-liquid slurry, in the tunneling process of the shield tunneling machine, a small amount of accelerator (the accelerator comprises but is not limited to water glass or other quick reaction strengthening reinforcing materials) which is packaged by water-soluble packaging materials is mixed in the single-liquid slurry, the single-liquid slurry which is mixed with the accelerator packaged by the water-soluble packaging materials is injected into the space between the soil body and the segment, after a period of time, the water-soluble materials for packaging the accelerator are dissolved, the accelerator is released, the accelerator reacts with the single-liquid slurry, and the local part of the single-liquid slurry can be quickly solidified (less than 1 hour), the local reinforcing concrete block quickly provides anti-floating support between the soil body and the segment, the buoyancy generated by synchronously grouting the unset tunnel segment is inhibited, and the deformation of the tunnel segment structure is controlled.
2. A small amount of accelerator packaged by a water-soluble packaging material is doped into the single-liquid slurry, the accelerator is sealed into a capsule type by the water-soluble packaging material, the water-soluble time of the capsule is controlled by adjusting the thickness and the material of the capsule for packaging the accelerator, the accelerator can be melted and released at a specific time outside the shield, and the problem that the shield machine system is failed due to the fact that the shield brush is stuck by the quick condensation of the accelerator is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 the drawings without creative efforts.
FIG. 1 is a schematic diagram of synchronous grouting of a current shield tunnel;
FIG. 2 is a schematic diagram of the synchronous grouting of the shield tunnel of the present invention;
FIG. 3 is a schematic view of the packaging of the accelerating agent of the present invention (taking an ellipsoid as an example);
FIG. 4 is a schematic diagram of the packaging of the two-compartment accelerator of the present invention (taking an ellipsoid as an example);
fig. 5 is a schematic diagram (1) of the efficacy process of the coagulation process node 15 according to the present invention;
fig. 6 is a schematic diagram (2) of the efficacy process of the coagulation process node 15 according to the present invention;
fig. 7 is a schematic diagram (3) of the efficacy process of the coagulation process node 15 according to the present invention.
In the drawings: the method comprises the following steps of 1, 2, a soil body on the periphery of a tunnel, 3, a shield segment, 4, a synchronous grouting pipeline of the shield machine, 5, a shield tail brush, 6, synchronous grouting slurry, 7, solidified synchronous grouting slurry, 8, a tunnel section which is not solidified yet in synchronous grouting, 9, a solidified tunnel section in synchronous grouting, 10, a grouting pipeline added with an accelerator, 11, a valve added with the accelerator, 12, an accelerator capsule, 12a, 12b, a second accelerator, 13, a water-soluble packaging material, 14, a coagulation block for providing buoyancy support for local coagulation, and 15, wherein the coagulation process node is formed.
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 the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "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 merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 2 to 7, the embodiment discloses a shield tunnel instant quick-setting synchronous grouting system, which includes a quick-setting admixture capsule 12, a synchronous grouting pipeline 4 of a shield machine, and an additive grouting pipeline 10, wherein the quick-setting admixture capsule 12 is formed by encapsulating a quick-setting admixture with a water-soluble encapsulating material 13, the additive grouting pipeline 10 is communicated with the synchronous grouting pipeline 4, the quick-setting admixture capsule 12 is doped into the synchronous grouting admixture in the synchronous grouting pipeline 4 through the additive grouting pipeline 10, so that the synchronous grouting pipeline 4 injects the synchronous grouting admixture doped with the quick-setting admixture capsule into a space between a soil body 2 and a pipe piece 3, after the water-soluble encapsulating material 13 of the quick-setting admixture capsule is dissolved, the quick-setting admixture is released, the quick-setting admixture reacts with the synchronous grouting admixture, a reinforcing coagulation block 14 is locally and rapidly generated, the local reinforcing coagulation block 14 rapidly provides support between the soil body 2 and the pipe piece 3, and the buoyancy generated by the tunnel segment 8 which is not solidified by synchronous grouting is inhibited, and the deformation of the tunnel segment structure is controlled.
Furthermore, a valve is arranged on the additive grouting pipeline.
Further, the accelerator capsule 12 is spherical or ellipsoidal in shape.
Further, the water-soluble encapsulating material of the accelerator capsule 12 is water-soluble plastic or resin; the accelerating agent adopts water glass or other rapid reaction strengthening reinforcing materials.
Further, the accelerator capsule 12 is provided with two independent chambers for respectively encapsulating two different self-reacting accelerator materials.
Further, an accelerator material is enclosed in the accelerator capsule 12.
Further, the synchronous grouting pipeline 4 is communicated with the additive grouting pipeline 10 through a tee joint. The additive grouting pipeline 10 is communicated with a main pipeline of the synchronous grouting pipeline 4.
The system further comprises a delivery device, an air compression device for providing delivery power for the accelerator capsule 12.
The system also includes an additive injection pump for providing delivery power to the cement slurry doped with accelerator capsules 12.
As shown in fig. 2 to 7, a method for rapid dissolution and rapid solidification type synchronous grouting of a shield tunnel includes the following steps:
1) the accelerator is packaged by a water-soluble packaging material; a third additive grouting pipeline 10 is additionally arranged in a synchronous grouting pipeline 4 of the shield tunneling machine 1, the third additive grouting pipeline 10 is communicated with the synchronous grouting pipeline 4, and an accelerator adding valve 11 is arranged on the third additive grouting pipeline 10.
2) In the tunneling process of the shield tunneling machine, an accelerator packaged by a water-soluble packaging material is injected into the synchronous grouting liquid through a third additive grouting pipeline 10 and a valve 11;
3) after the synchronous grouting slurry 6 doped with the accelerator packaged by the water-soluble packaging material is injected into a space between the soil body 2 and the pipe piece 3 (see figure 5), the water-soluble material 13 for packaging the accelerator is dissolved according to time requirements, the accelerator is released (see figure 6), the accelerator reacts with the synchronous grouting slurry 6, the local reinforced coagulation block 14 (see figure 7) is rapidly generated, the local reinforced coagulation block 14 rapidly provides support between the soil body 2 and the pipe piece 3, the buoyancy generated by the synchronous grouting of the unset tunnel section 8 is inhibited, and the deformation of the tunnel pipe piece structure is controlled. Referring to fig. 2, 7 is the solidified simultaneous grouting slurry, 8 is the simultaneous grouting unset tunnel section, and 9 is the simultaneous grouting solidified tunnel section.
Further, the accelerator is sealed into a capsule type by a water-soluble packaging material, and the water-soluble time of the capsule is controlled by adjusting the thickness and the material of the capsule for packaging the accelerator. The accelerator is sealed into a capsule type through water-soluble plastics or resin, the thickness of the capsule and the proper water-soluble time of the material are adjusted, the accelerator can be melted and released at the specific time outside the shield, and the problem that the shield machine system fails due to the fact that the shield tail brush 5 is stuck by the accelerator due to rapid condensation is avoided.
Furthermore, the size of the capsule for encapsulating the accelerator meets the fluidity requirement of the grouting pipeline of the shield tunneling machine; the capsule shape of the encapsulated accelerating agent is spherical or ellipsoidal, and the like.
Furthermore, the capsule for encapsulating the accelerator is independently arranged in a plurality of bins and is used for encapsulating a plurality of different accelerator materials according to actual needs.
Further, referring to fig. 4, the accelerator-encapsulating capsule employs two independent containers for encapsulating two different accelerator materials, such as 12a and 12b, where 12a is a first accelerator and 12b is a second accelerator reactive with the first accelerator. In the embodiment, the first accelerating agent is water glass, the second accelerating agent is calcium chloride solution, and the two solutions react rapidly to generate silica gel and calcium silicate gel, so that the functions of cementing and filling pores are achieved, and the strength and the bearing capacity of soil are improved. It is commonly used for foundation reinforcement of silt, sandy soil and filling soil, and is called double-liquid grouting.
The utility model discloses can divide two capsules of these two kinds of materials to encapsulate respectively, also can adopt a capsule encapsulation with these two kinds of materials, can also add calcium chloride in synchronous grouting material certainly, and the capsule only releases water glass and so on. The utility model discloses be not limited to above-mentioned two kinds of materials, also can study other similar materials.
Further, referring to fig. 3, an accelerator material is encapsulated in the accelerator encapsulating capsule.
Furthermore, a third additive grouting pipeline is additionally arranged to be communicated with a synchronous grouting pipeline of the shield tunneling machine, and a valve is arranged on the third additive grouting pipeline; and (3) locally or quantitatively adding an accelerator encapsulated by a water-soluble encapsulating material into the single-fluid slurry through a third-way additive grouting pipeline and a valve. The accelerator encapsulated by the water-soluble encapsulating material can be pressed in by air pressure or participate in the pressing in of cement paste, but the flowing time of the accelerator encapsulated by the water-soluble encapsulating material in a pipeline is counted in the water-soluble time control of the capsule.
Further, the synchronous grouting liquid is single-liquid slurry.
Further, the accelerator includes, but is not limited to, water glass or other fast-reacting reinforcing materials. The accelerator commonly used in engineering is water glass, which reacts with calcium chloride added to concrete to produce silica gel and calcium silicate gel.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a shield tunnel instant quick setting type synchronous slip casting system which characterized in that: the quick-setting agent grouting pipeline comprises a quick-setting agent capsule (12), a synchronous grouting pipeline (4) of a shield machine and an additive grouting pipeline (10), wherein the quick-setting agent capsule (12) is formed by packaging a quick-setting agent by a water-soluble packaging material (13), the additive grouting pipeline (10) is communicated with the synchronous grouting pipeline (4), the quick-setting agent capsule (12) is doped in synchronous grouting slurry of the synchronous grouting pipeline (4) through the additive grouting pipeline (10), the synchronous grouting pipeline (4) injects the synchronous grouting slurry doped with the quick-setting agent capsule into a space between a soil body (2) and a pipe piece (3), after the water-soluble packaging material (13) of the quick-setting agent capsule is dissolved, the quick-setting agent is released and reacts with the synchronous grouting slurry, a reinforcing coagulation block (14) is locally and rapidly generated, and the local reinforcing coagulation block (14) rapidly provides support between the soil body (2) and the pipe piece (3), the buoyancy generated by the tunnel segment (8) which is not solidified by synchronous grouting is inhibited, and the deformation of the tunnel segment structure is controlled.
2. The system of claim 1, wherein: and a valve is arranged on the additive grouting pipeline.
3. The system of claim 1, wherein: the shape of the accelerating agent capsule (12) is spherical or ellipsoidal; the water-soluble packaging material of the accelerating agent capsule (12) adopts water-soluble plastics or resin; the accelerating agent adopts water glass or other rapid reaction strengthening reinforcing materials.
4. The system of claim 1, wherein: the accelerating agent capsule (12) adopts two bins which are independently arranged and are used for respectively encapsulating two different accelerating agent materials which are self-reacted.
5. The system of claim 1, wherein: an accelerator material is encapsulated in the accelerator capsule (12).
6. The system of claim 1, wherein: the synchronous grouting pipeline (4) is communicated with the additive grouting pipeline (10) through a tee joint.
7. The system of claim 1, wherein: the quick-setting admixture capsule conveying device further comprises conveying equipment and an air compression device, wherein the air compression device is used for providing conveying power for the quick-setting admixture capsule (12).
8. The system of claim 1, wherein: an additive grouting pump is also included for providing conveying power for the cement slurry doped with the accelerator capsules (12).
9. An accelerator capsule, which is characterized in that: the accelerator capsule is formed by encapsulating an accelerator with a water-soluble encapsulating material (13).
10. The accelerator capsule according to claim 9, wherein: the shape of the accelerating agent capsule is spherical or ellipsoidal; the water-soluble packaging material (13) of the accelerating agent capsule adopts water-soluble plastics or resin; the accelerating agent adopts water glass or other rapid reaction strengthening reinforcing materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921627545.XU CN211448700U (en) | 2019-09-27 | 2019-09-27 | Shield tunnel instant quick-setting type synchronous grouting system and quick-setting agent capsule |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921627545.XU CN211448700U (en) | 2019-09-27 | 2019-09-27 | Shield tunnel instant quick-setting type synchronous grouting system and quick-setting agent capsule |
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| CN211448700U true CN211448700U (en) | 2020-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153326A (en) * | 2021-04-21 | 2021-07-23 | 广州市力劲机电有限公司 | Shield synchronous grouting quick setting device and using method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153326A (en) * | 2021-04-21 | 2021-07-23 | 广州市力劲机电有限公司 | Shield synchronous grouting quick setting device and using method |
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