CN111425208A - Anti-suspension device, system and method based on shield segment - Google Patents
Anti-suspension device, system and method based on shield segment Download PDFInfo
- Publication number
- CN111425208A CN111425208A CN202010235867.0A CN202010235867A CN111425208A CN 111425208 A CN111425208 A CN 111425208A CN 202010235867 A CN202010235867 A CN 202010235867A CN 111425208 A CN111425208 A CN 111425208A
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- Prior art keywords
- grouting
- bolt
- anchoring
- shield
- shield segment
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000725 suspension Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title abstract description 9
- 238000004873 anchoring Methods 0.000 claims abstract description 50
- 229920006254 polymer film Polymers 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 238000005339 levitation Methods 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 6
- 239000011440 grout Substances 0.000 claims description 5
- 239000011083 cement mortar Substances 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 2
- 239000004571 lime Substances 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010719 annulation reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an anti-suspension device, system and method based on shield segments, and the technical scheme is as follows: the shield comprises a shield segment and anchoring grouting bolts, wherein the shield segment is provided with bolt holes for inserting the anchoring grouting bolts; the grouting hole that inserts the slip casting pipe is reserved at anchor slip casting bolt center, and anchor slip casting bolt includes the bolt main part and locates the polymer film of bolt main part bottom, pours into the fast lime set of fibre through the slip casting pipe into, and polymer film can expand the expansion rapidly under the slip casting pressure effect. The invention can effectively position and fix the ring-forming shield segment, accurately position the original design line position, improve the grouting compactness and ensure the same grouting thickness around the back of the ring-forming segment.
Description
Technical Field
The invention relates to the technical field of shield tunnels, in particular to an anti-suspension device, an anti-suspension system and an anti-suspension method based on shield segments.
Background
With the development of underground rail transit in China becoming faster and faster, the shield tunnel construction technology has been widely applied. The splicing and positioning of shield segments in the shield construction process directly relate to the overall quality of a shield tunnel, and the durability and the safety of the tunnel are influenced.
The inventor finds that in the prior art, the defects of the shield segment in the splicing process are researched more, and a better solution is provided for the defects in splicing. However, gaps formed between the segments and surrounding rocks in the process of splicing the segments into rings by the shield tunneling machine are ignored, slurry flows downwards due to gravity during back grouting, the ring-forming segments float upwards to deviate from the original positioning under the action of grouting pressure, and the original design line of the tunnel is not met.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an anti-suspension device, system and method based on shield segments, which can effectively position and fix the ring-forming shield segments, accurately position the original design line, improve the grouting compactness and ensure the same grouting thickness around the back of the ring-forming segments.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the invention provides an anti-suspension device based on a shield segment, which comprises a shield segment and anchoring grouting bolts, wherein the shield segment is provided with bolt holes for inserting the anchoring grouting bolts;
the grouting hole for inserting the grouting pipe is reserved in the center of the anchoring grouting bolt, the anchoring grouting bolt comprises a bolt main body and a polymer film arranged at the bottom of the bolt main body, fiber fast-setting liquid is injected through the grouting pipe, and the polymer film can expand and expand rapidly under the action of grouting pressure.
In a second aspect, an embodiment of the present invention further provides an anti-levitation system based on shield segments, including a plurality of anti-levitation devices, where a plurality of shield segments are assembled together to form an annular structure.
In a third aspect, an embodiment of the present invention further provides a construction method for a shield segment-based anti-suspension system, including:
assembling shield segments into a ring along surrounding rocks, placing anchoring grouting bolts in bolt holes, and adding waterproof gaskets between the anchoring grouting bolts and the shield segments;
inserting a grouting pipe into the bottom of an anchoring grouting bolt, and connecting the grouting pipe with a grouting instrument; the fiber quick-setting liquid is injected through the grouting pipe, and the polymer film is rapidly expanded to the periphery under the action of grouting pressure; and then pulling out the grouting pipe, replacing another grouting pipe, inserting the grouting pipe into the grouting section of the anchoring grouting bolt, and injecting cement mortar.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
(1) the bottom of the anchoring grouting bolt in one or more embodiments of the invention is provided with the polymer film, which can expand rapidly under the action of grouting pressure to increase the contact area between the anchoring grouting bolt and surrounding rocks so as to prevent the anchoring grouting bolt from entering the soil body to have no positioning effect when the surrounding rocks are soft; after the polymer film is expanded, bolts can be effectively prevented from entering surrounding soil bodies, a better positioning effect is achieved, and the phenomenon that the segment floats upwards and deviates from the original position due to the fact that slurry flows downwards can be prevented;
(2) according to one or more embodiments of the invention, the fiber quick-setting liquid is injected into the polymer film, the fiber quick-setting liquid can be quickly set to reach a certain strength in a short time, wherein the fiber is equivalent to a steel bar in a reinforced concrete body, and the strength of the quick-setting agent can be greatly improved;
(3) the grouting bolt in one or more embodiments of the invention is divided into an anchoring section and a grouting section, the anchoring section has an anchoring effect by the thread fit of the bolt and the reserved bolt hole, and the anchoring effect is good; the grouting section is used for grouting through a reserved grouting pipe, and due to the positioning effect of the bolts, the pipe piece cannot float upwards due to grouting pressure, so that the compactness and uniformity of grouting are ensured;
(4) in one or more embodiments of the invention, the shield segment and the back grouting body are integrated into a whole by anchoring the grouting bolt, so that the integrity of the shield segment is enhanced, the structural performance of the shield tunnel is enhanced, and the safety is ensured;
(5) one or more embodiments of the invention install a waterproof gasket between the anchoring grouting bolt and the reserved bolt hole to prevent groundwater behind the duct piece from flowing into the tunnel along the reserved hole.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a shield segment construction according to one or more embodiments of the present invention;
FIG. 2 is a shield segment top view of the present invention according to one or more embodiments;
FIG. 3 is a front view of a shield segment according to one or more embodiments of the present invention;
FIG. 4 is a schematic illustration of an anchor slip casting bolt configuration according to one or more embodiments of the present disclosure;
FIG. 5 is a top view of an anchor grouting bolt according to one or more embodiments of the present disclosure;
FIG. 6 is a schematic diagram of an anchor grouting bolt structure after expansion of a polymer film according to one or more embodiments of the invention;
FIG. 7 is a schematic cross-sectional view of an anchor grouting bolt of the present disclosure driven into a shield segment in accordance with one or more embodiments;
FIG. 8 is a schematic diagram of an anti-levitation system according to one or more embodiments of the present invention;
the shield grouting structure comprises a shield segment 1, a bolt hole 2, a first round hole 2-1, a second round hole 2-2, an anchoring grouting bolt 3, a bolt cap 3-1, an anchoring section 3-2, a grouting section 3-3, a grouting hole 3-4, a grout outlet 3-5, a high polymer film 4, a fiber quick setting liquid 5, a waterproof gasket 6, surrounding rocks 7 and cement mortar 8.
Detailed Description
Just as the introduction of background art, because gravity causes the thick liquid to flow downwards when having shield structure section of jurisdiction slip casting behind one's back among the prior art, the ring-forming section of jurisdiction come-up skew original location under the slip casting pressure effect, does not accord with the problem of the original design line of tunnel, to above-mentioned problem, this application has provided an anti-suspension device, system and method based on shield structure section of jurisdiction.
The first embodiment is as follows:
the present invention is described in detail below with reference to fig. 1 to 6, and specifically, the structure is as follows:
the embodiment provides an anti-suspension device based on shield segment, including shield segment 1 and anchor slip casting bolt 3, shield segment 1 offers and is used for anchor slip casting bolt 3 male bolt hole 2.
As shown in fig. 3, the bolt holes 2 are located at the center of the shield segment 1, so that the shield segment 1 is stressed uniformly. The bolt hole 2 comprises a first round hole 2-1 and a second round hole 2-2 which are coaxially arranged, and the diameter of the first round hole 2-1 is larger than that of the second round hole 2-2. The second round hole 2-2 is provided with internal threads.
As shown in fig. 4, a grouting hole 3-4 for inserting a grouting pipe is reserved in the center of the anchoring grouting bolt 3, and the grouting hole 3-4 penetrates through the whole anchoring grouting bolt 3. After the anchoring grouting bolts 3 are driven into the shield segment 1, the grouting pipes can be connected with an external grouting instrument to complete segment back grouting through the grouting holes 3-4.
The anchoring grouting bolt 3 comprises a bolt main body and a polymer film 4, and the polymer film 4 is arranged on the outer side of the bottom of the bolt main body; the fast lime set 5 of fibre is poured into through the slip casting pipe, and polymer film 4 can expand the expansion rapidly under the slip casting pressure effect, and the area of contact of increase and surrounding rock plays fine positioning action. The fiber quick-setting liquid 5 is composed of cement, fibers and an accelerating agent, wherein the fibers play a role of reinforcing steel bars in reinforced concrete.
The bolt cap 3-1 is fixed at the top end of the bolt main body, and in the embodiment, as shown in fig. 5, the bolt cap 3-1 is a regular hexagon. The diameter of the circumscribed circle of the bolt cap 3-1 is slightly smaller than that of the first round hole 1, and a working surface is reserved for a tool for installing the anchoring grouting bolt 3.
The diameter of the bolt main body is the same as that of the second round hole 2-2 of the threaded hole 2, and the bolt main body is divided into an anchoring section 3-2 and a grouting section 3-3. The anchoring section 3-2 is provided with an external thread which is matched with the internal thread of the second round hole 2-2 to play a role in anchoring. The length of the external thread of the anchoring section 3-2 is slightly larger than the depth of the second round hole 2-2, so that the anchoring length is ensured. The surface of the grouting section 3-3 is unthreaded, and a plurality of slurry outlet holes 3-5 distributed in a plum blossom shape are arranged, so that the strength of the bolt is ensured, and the slurry outlet amount is also met. The number of the grout outlet holes 3-5 is set according to actual grouting requirements.
Example two:
the embodiment provides an anti-suspension system based on shield segments, as shown in fig. 8, comprising a plurality of anti-suspension devices according to the first embodiment, wherein a plurality of shield segments 1 are spliced together to form an annular structure. In this embodiment, six shield constructs section of jurisdiction 1 annulations, because bolt hole 2 is located end shield and constructs 1 central point in section of jurisdiction and put for shield constructs 1 atress comparatively evenly, strengthens shield and constructs the overall structure nature of section of jurisdiction 1.
As shown in fig. 7, a waterproof gasket 6 is arranged between the anchoring grouting bolt 3 and the bolt hole 2 to prevent groundwater from flowing into the tunnel along the reserved bolt hole 2 after the shield segment 1 is back-mounted. In this embodiment, the waterproof gasket 6 is a rubber gasket. It is understood that in other embodiments, the waterproof gasket 6 may be made of other waterproof materials.
Example three:
the embodiment provides a construction method of an anti-suspension system based on shield segments, which comprises the following specific steps:
after the shield segment 1 is assembled into a ring, the shield machine continues to drive forwards, the anchoring grouting bolts 3 are driven into the bolt holes 2, and waterproof gaskets 6 are added between the anchoring grouting bolts 3 and the shield segment 1. After the anchoring grouting bolt 3 is installed, a grouting pipe is inserted into the bottom of the bolt through the grouting holes 3-4 and connected with a grouting instrument. The fiber quick-setting liquid 5 is injected through the grouting pipe, the polymer film 4 is rapidly expanded to the periphery under the action of grouting pressure, and the contact area of the polymer film and the surrounding rock 7 is increased.
When surrounding rock 7 is soft soil, can cause partial anchor slip casting bolt 3 to get into the soil, at this moment polymer film 4 expands rapidly under the slip casting pressure effect, can effectually prevent that the bolt part from getting into surrounding soil, plays better positioning action.
And then, pulling out the grouting pipe and replacing another grouting pipe to insert the grouting pipe into the grouting section 3-3, injecting cement mortar 8, injecting the grout into the gap around the grouting section from the reserved grouting hole 3-5, and filling the grout into the gap after the grouting is finished, wherein the effect is shown in fig. 8.
The installation of the anchoring grouting bolt 3 plays a role in positioning the looped shield segment 1, so that the looped shield segment is matched with the original design line. And then grouting is carried out to ensure compact grouting, and the phenomenon that the whole shield segment 1 floats upwards along with the increase of grouting pressure is avoided. The back grouting body of the shield segment 1 is integrated with the segment through the anchoring grouting bolt 3, so that the integrity of the shield segment 1 is enhanced.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An anti-suspension device based on a shield segment is characterized by comprising a shield segment and anchoring grouting bolts, wherein the shield segment is provided with bolt holes for inserting the anchoring grouting bolts;
a grouting hole for inserting a grouting pipe is reserved in the center of the anchoring grouting bolt, and the anchoring grouting bolt comprises a bolt main body and a polymer film arranged at the bottom of the bolt main body; the rapid fiber coagulation liquid is injected through the grouting pipe, and the polymer film can expand and expand rapidly under the action of grouting pressure.
2. The anti-suspension device based on the shield segment as claimed in claim 1, wherein the bolt body comprises an anchoring section and a grouting section, the anchoring section is provided with external threads, and the grouting section is provided with a plurality of grout outlet holes.
3. The shield segment-based anti-levitation device as recited in claim 2, wherein a bolt cap is connected to a top end of the bolt body.
4. The shield segment-based anti-levitation device as recited in claim 2, wherein the bolt hole comprises a first circular hole and a second circular hole which are coaxially arranged, and the diameter of the first circular hole is larger than that of the second circular hole.
5. The shield segment-based anti-suspension device according to claim 4, wherein the second circular hole has an internal thread matched with the external thread of the anchoring section.
6. The shield segment-based anti-levitation device as recited in claim 4, wherein the length of the external thread of the anchoring section is greater than the depth of the second circular hole.
7. The anti-levitation device based on the shield segment as claimed in claim 1, wherein the bolt hole is located in the center of the shield segment.
8. An anti-levitation system based on shield segments, comprising a plurality of anti-levitation devices as recited in any one of claims 1-7, wherein the plurality of shield segments are assembled together to form an annular structure.
9. The shield segment-based anti-suspension system according to claim 8, wherein a waterproof gasket is arranged between the anchoring grouting bolt and the bolt hole.
10. The construction method of the shield segment-based anti-suspension system according to any one of claims 8 to 9, comprising:
assembling shield segments into a ring along surrounding rocks, placing anchoring grouting bolts in bolt holes, and adding waterproof gaskets between the anchoring grouting bolts and the shield segments;
inserting a grouting pipe into the bottom of an anchoring grouting bolt, and connecting the grouting pipe with a grouting instrument; the fiber quick-setting liquid is injected through the grouting pipe, and the polymer film is rapidly expanded to the periphery under the action of grouting pressure; and then pulling out the grouting pipe, replacing another grouting pipe, inserting the grouting pipe into the grouting section of the anchoring grouting bolt, and injecting cement mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235867.0A CN111425208A (en) | 2020-03-30 | 2020-03-30 | Anti-suspension device, system and method based on shield segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235867.0A CN111425208A (en) | 2020-03-30 | 2020-03-30 | Anti-suspension device, system and method based on shield segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111425208A true CN111425208A (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010235867.0A Pending CN111425208A (en) | 2020-03-30 | 2020-03-30 | Anti-suspension device, system and method based on shield segment |
Country Status (1)
| Country | Link |
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| CN (1) | CN111425208A (en) |
Cited By (3)
| 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 |
| CN113653511A (en) * | 2021-09-01 | 2021-11-16 | 珠海华发城市研究院有限公司 | Leaking stoppage and grouting method for shield tunnel joint |
| CN114542572A (en) * | 2022-03-02 | 2022-05-27 | 宁波浩渤工贸有限公司 | Anti-corrosion segment bolt for sewage discharge shield tunnel and preparation method thereof |
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| CN205225272U (en) * | 2015-12-15 | 2016-05-11 | 中铁二十局集团第五工程有限公司 | Mantlet constructs section of jurisdiction come -up construction structures |
| CN107130979A (en) * | 2017-05-31 | 2017-09-05 | 广州市市政工程设计研究总院 | A kind of shield sky pushes through the section of jurisdiction float Structure and construction method of Tunneling by mining method |
| CN206942783U (en) * | 2017-06-14 | 2018-01-30 | 中铁第四勘察设计院集团有限公司 | A kind of shield duct piece |
| CN206942799U (en) * | 2017-06-16 | 2018-01-30 | 中铁第一勘察设计院集团有限公司 | A kind of shield tunnel anti-floating system based on prestress anchorage cable |
| CN108331597A (en) * | 2018-01-22 | 2018-07-27 | 中建市政工程有限公司 | Shield tunnel segment wall post-grouting construction method |
-
2020
- 2020-03-30 CN CN202010235867.0A patent/CN111425208A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205225272U (en) * | 2015-12-15 | 2016-05-11 | 中铁二十局集团第五工程有限公司 | Mantlet constructs section of jurisdiction come -up construction structures |
| CN107130979A (en) * | 2017-05-31 | 2017-09-05 | 广州市市政工程设计研究总院 | A kind of shield sky pushes through the section of jurisdiction float Structure and construction method of Tunneling by mining method |
| CN206942783U (en) * | 2017-06-14 | 2018-01-30 | 中铁第四勘察设计院集团有限公司 | A kind of shield duct piece |
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| CN108331597A (en) * | 2018-01-22 | 2018-07-27 | 中建市政工程有限公司 | Shield tunnel segment wall post-grouting construction method |
Cited By (5)
| 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 |
| CN113653511A (en) * | 2021-09-01 | 2021-11-16 | 珠海华发城市研究院有限公司 | Leaking stoppage and grouting method for shield tunnel joint |
| CN113653511B (en) * | 2021-09-01 | 2023-12-29 | 珠海华发城市研究院有限公司 | Shield tunnel joint plugging grouting method |
| CN114542572A (en) * | 2022-03-02 | 2022-05-27 | 宁波浩渤工贸有限公司 | Anti-corrosion segment bolt for sewage discharge shield tunnel and preparation method thereof |
| CN114542572B (en) * | 2022-03-02 | 2023-10-24 | 宁波浩渤工贸有限公司 | Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof |
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Application publication date: 20200717 |
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| RJ01 | Rejection of invention patent application after publication |