CN209780919U - Shield constructs portal block structure - Google Patents
Shield constructs portal block structure Download PDFInfo
- Publication number
- CN209780919U CN209780919U CN201920361124.0U CN201920361124U CN209780919U CN 209780919 U CN209780919 U CN 209780919U CN 201920361124 U CN201920361124 U CN 201920361124U CN 209780919 U CN209780919 U CN 209780919U
- Authority
- CN
- China
- Prior art keywords
- embedded steel
- ring
- shield
- steel plates
- plugging
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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.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 238000003466 welding Methods 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000004576 sand Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model relates to a shield constructs construction technical field, and specifically speaking relates to a shield constructs portal block structure. The shield tunnel comprises an embedded steel ring arranged at a shield tunnel portal and a plurality of embedded steel plates arranged in a shield channel, wherein the plurality of embedded steel plates are sequentially connected in the circumferential direction to form a circular ring, and the inner ends of the embedded steel plates are used for connecting shield segments; the outer diameter of a ring formed by the plurality of embedded steel plates is smaller than the inner diameter of the embedded steel ring, and a closed space ring is formed between the outer side of the ring formed by the plurality of embedded steel plates and the inner wall of the shield channel through grouting; a gap exists between the outer end of the circular ring formed by the plurality of embedded steel plates and the outer end of the embedded steel ring, and a plugging ring is arranged between the circular ring formed by the plurality of embedded steel plates and the embedded steel ring; the outer end of the plugging ring is parallel and level to the outer end of the embedded steel ring, the outer side wall of the plugging ring is connected with the inner side wall of the embedded steel ring in a welding mode, and the inner end of the plugging ring is connected with the outer end of a circular ring formed by the embedded steel plates in a welding mode. The utility model discloses simple structure, be convenient for realize.
Description
Technical Field
The utility model relates to a shield constructs construction technical field, and specifically speaking relates to a shield constructs portal block structure.
Background
The existing tunnel portal blocking measures for shield starting and receiving mainly aim at some preparation works before shield starting and receiving, such as stratum reinforcement, tunnel portal sealing cord fabric and the like, but no economic and effective emergency measures are provided for risks such as water gushing and sand gushing in a water-rich stratum, and after shield tunneling is completed, no protection measures are provided for exposed consolidated soil after head and tail ring pipe sheets are removed, so that a hydraulic channel is easily formed, and water gushing and sand gush are caused.
SUMMERY OF THE UTILITY MODEL
The tunnel portal plugging measure that starts and receive to shield that exists among the prior art can't solve the defect that gushes water and gushes husky problem in the rich water stratum, the utility model provides a shield constructs tunnel portal plugging structure. The method can be used for emergency rescue in case of water burst and sand burst dangerous situation at the beginning of the shield, and rapidly plugging a water burst area; and the shield can be installed and welded after the segments at the head and the tail of the shield are removed, so that a hydraulic channel is prevented from being formed due to too long exposed time of a slurry consolidation area behind the segment wall at the portal.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve:
A shield tunnel portal plugging structure comprises an embedded steel ring arranged at a shield tunnel portal and a plurality of embedded steel plates arranged in a shield channel, wherein the plurality of embedded steel plates are sequentially connected in the circumferential direction to form a circular ring, and the inner ends of the embedded steel plates are used for connecting shield segments;
The outer diameter of a ring formed by the plurality of embedded steel plates is smaller than the inner diameter of the embedded steel ring, and a closed space ring is formed between the outer side of the ring formed by the plurality of embedded steel plates and the inner wall of the shield channel through grouting;
A gap exists between the outer end of the circular ring formed by the plurality of embedded steel plates and the outer end of the embedded steel ring, and a plugging ring is arranged between the circular ring formed by the plurality of embedded steel plates and the embedded steel ring; the outer end of the plugging ring is parallel and level to the outer end of the embedded steel ring, the outer side wall of the plugging ring is connected with the inner side wall of the embedded steel ring in a welding mode, and the inner end of the plugging ring is connected with the outer end of a circular ring formed by the embedded steel plates in a welding mode.
The utility model discloses in, through setting up the shutoff ring: on one hand, the method can effectively control dangerous situations such as water burst, sand burst and the like in time when the shield is started; on the other hand, when the shield is finished, the soil body at the closed space ring and the tunnel portal can be better shielded, so that the closed space ring can be effectively prevented from forming a water conservancy channel due to overlong exposure time, and further water burst, sand burst and other conditions are avoided. Therefore, the method can be effectively suitable for shield construction of water-rich stratum, and the construction safety is effectively ensured.
In addition, because the embedded steel ring, the embedded steel plate and the grouting formed closed space ring are all common construction structures in shield construction, the implementation has wider applicability by adding the plugging ring, and the method is low in cost and easy to implement.
preferably, the plugging ring comprises a plurality of arc-shaped plates which are sequentially connected in the circumferential direction, and adjacent arc-shaped plates are connected in a welding mode. Thereby facilitating manufacture, transport and installation.
Preferably, the inner diameter of the plugging ring is equal to half of the sum of the inner diameter and the outer diameter of a circular ring formed by the plurality of embedded steel plates. Therefore, the arrangement of the plugging ring can not interfere the normal construction of the shield.
preferably, the length of the occlusion ring is 430 mm. Thereby having better plugging performance.
preferably, the embedded steel ring is provided with a plurality of bolt holes along the circumferential direction, and the bolt holes are plugged by quick-hardening cement. Due to the arrangement of the bolt holes, when the shield is carried out, the bolt holes can be better matched with the bolts, so that the shield equipment can be conveniently built; when the shield is finished, the inner and outer spaces of the embedded steel ring can be effectively plugged through plugging of the quick-hardening cement.
The utility model discloses in, carry out the setting of shutoff through the bolted connection position with between section of jurisdiction pre-buried steel sheet and the section of jurisdiction through rapid hardening cement, promoted the leakproofness that forms the sealing washer between shield tunnel portal arc shutoff steel sheet and the section of jurisdiction to prevented among the gap of rivers inflow section of jurisdiction and soil layer.
drawings
fig. 1 is a schematic view of a shield tunnel portal blocking structure in embodiment 1;
FIG. 2 is a schematic half-section view of FIG. 1;
FIG. 3 is a schematic outer end view of FIG. 1;
Fig. 4 is a schematic view of the plugging ring in example 1.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention only and are not limiting.
Example 1
as shown in fig. 1-4, the present embodiment provides a shield tunnel portal blocking structure, which includes an embedded steel ring 110 disposed at a shield tunnel portal and a plurality of embedded steel plates 130 disposed in a shield tunnel, where the plurality of embedded steel plates 130 are sequentially connected in a circumferential direction to form a circular ring, and an inner end of each embedded steel plate 130 is used for connecting a shield segment 120;
The outer diameter of the ring formed by the plurality of embedded steel plates 130 is smaller than the inner diameter of the embedded steel ring 110, and a closed space ring 310 is formed between the outer side of the ring formed by the plurality of embedded steel plates 130 and the inner wall of the shield channel through grouting;
A gap exists between the outer end of the circular ring formed by the plurality of embedded steel plates 130 and the outer end of the embedded steel ring 110, and a plugging ring 140 is arranged between the circular ring formed by the plurality of embedded steel plates 130 and the embedded steel ring 110; the outer end of the plugging ring 140 is parallel and level to the outer end of the embedded steel ring 110, the outer side wall of the plugging ring 140 is welded to the inner side wall of the embedded steel ring 110, and the inner end of the plugging ring 140 is welded to the outer end of a circular ring formed by the embedded steel plates 130.
In this embodiment, the plugging ring 140 includes a plurality of arc plates 410 sequentially connected in the circumferential direction, and adjacent arc plates 410 are welded to each other.
In this embodiment, the inner diameter of the plugging ring 140 is equal to half of the sum of the inner diameter and the outer diameter of the circular ring formed by the plurality of embedded steel plates 130.
In this embodiment, the length of the occlusion ring 140 is 430 mm.
in this embodiment, pre-buried steel ring 110 department is equipped with a plurality of bolt holes 111 along circumference, and bolt hole 111 department carries out the shutoff through rapid hardening cement.
Through the shield tunnel portal plugging structure in the embodiment, a plugging structure can be formed between the embedded steel plate 130 and the embedded steel ring 110, so that the shield segment 120 and the closed space ring 310 constructed between the inner walls of the shield tunnel can be effectively isolated, better control on water burst, sand burst and other dangerous situations can be better facilitated when the shield is started, and adverse consequences such as water burst, sand burst and the like caused by formation of a water conservancy channel can be effectively prevented when the shield is completed.
In this embodiment, the welding modes between the arc plate 410, the embedded steel ring 110 and the segment embedded steel plate 130 are all full welding. Therefore, the sealing performance is better.
In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.
Claims (5)
1. the utility model provides a shield constructs portal block structure which characterized in that: the shield tunnel comprises an embedded steel ring (110) arranged at a shield tunnel portal and a plurality of embedded steel plates (130) arranged in a shield tunnel, wherein the plurality of embedded steel plates (130) are sequentially connected in the circumferential direction to form a circular ring, and the inner ends of the embedded steel plates (130) are used for connecting shield segments (120);
the outer diameter of a circular ring formed by the embedded steel plates (130) is smaller than the inner diameter of the embedded steel ring (110), and a closed space ring (310) is formed between the outer side of the circular ring formed by the embedded steel plates (130) and the inner wall of the shield channel through grouting;
A space exists between the outer end of the circular ring formed by the plurality of embedded steel plates (130) and the outer end of the embedded steel ring (110), and a plugging ring (140) is arranged between the circular ring formed by the plurality of embedded steel plates (130) and the embedded steel ring (110); the outer end of the plugging ring (140) is parallel and level to the outer end of the embedded steel ring (110), the outer side wall of the plugging ring (140) is welded to the inner side wall of the embedded steel ring (110), and the inner end of the plugging ring (140) is welded to the outer end of a circular ring formed by the embedded steel plates (130).
2. The shield tunnel portal blocking structure according to claim 1, characterized in that: the plugging ring (140) comprises a plurality of arc-shaped plates (410) which are sequentially connected in the circumferential direction, and adjacent arc-shaped plates (410) are connected in a welding mode.
3. The shield tunnel portal blocking structure according to claim 1, characterized in that: the inner diameter of the plugging ring (140) is equal to half of the sum of the inner diameter and the outer diameter of a circular ring formed by the embedded steel plates (130).
4. The shield tunnel portal blocking structure according to claim 1, characterized in that: the length of the plugging ring (140) is 430 mm.
5. The shield tunnel portal blocking structure according to claim 1, characterized in that: a plurality of bolt holes (111) are formed in the position of the embedded steel ring (110) along the circumferential direction, and the bolt holes (111) are plugged through quick-hardening cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920361124.0U CN209780919U (en) | 2019-03-21 | 2019-03-21 | Shield constructs portal block structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920361124.0U CN209780919U (en) | 2019-03-21 | 2019-03-21 | Shield constructs portal block structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209780919U true CN209780919U (en) | 2019-12-13 |
Family
ID=68798761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920361124.0U Expired - Fee Related CN209780919U (en) | 2019-03-21 | 2019-03-21 | Shield constructs portal block structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209780919U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187493A (en) * | 2021-05-18 | 2021-07-30 | 中交二航局成都城市建设工程有限公司 | Control method for preventing negative ring duct piece from floating upwards in steel sleeve of shield tunneling machine |
-
2019
- 2019-03-21 CN CN201920361124.0U patent/CN209780919U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187493A (en) * | 2021-05-18 | 2021-07-30 | 中交二航局成都城市建设工程有限公司 | Control method for preventing negative ring duct piece from floating upwards in steel sleeve of shield tunneling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 |
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| CF01 | Termination of patent right due to non-payment of annual fee |