CN220909686U - Pressure-bearing water stratum slurry shield originating permanent sealing structure - Google Patents
Pressure-bearing water stratum slurry shield originating permanent sealing structure Download PDFInfo
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- CN220909686U CN220909686U CN202322574102.1U CN202322574102U CN220909686U CN 220909686 U CN220909686 U CN 220909686U CN 202322574102 U CN202322574102 U CN 202322574102U CN 220909686 U CN220909686 U CN 220909686U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000007789 sealing Methods 0.000 title claims abstract description 35
- 239000002002 slurry Substances 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 239000004519 grease Substances 0.000 claims abstract description 15
- 239000006260 foam Substances 0.000 claims abstract description 12
- 238000001556 precipitation Methods 0.000 claims abstract description 5
- 230000000977 initiatory effect Effects 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 30
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 10
- 230000002787 reinforcement Effects 0.000 description 10
- 239000004576 sand Substances 0.000 description 6
- 235000006506 Brasenia schreberi Nutrition 0.000 description 5
- 244000267222 Brasenia schreberi Species 0.000 description 5
- 230000005641 tunneling Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007613 environmental effect Effects 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
- 238000000275 quality assurance Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides a pressure-bearing water stratum slurry shield starting permanent sealing structure, which comprises the following components: a pressure-bearing water stratum, a composite enclosing structure, an originating well main body structure and an originating precipitation relief well; foam boards are pre-embedded on the composite enclosure structure at the inner side of the originating portal; an originating door ring and a sealing grease injecting pipe are arranged on the originating well main body structure; a plurality of high-strength steel wire brushes are arranged in the starting portal ring. The utility model has the advantages of safe construction, low cost, environment-friendly construction, short construction period, strong practicability, advanced technology and the like, and the originating sealing device is successfully applied to the originating construction of a subway shield, fills the blank of the originating sealing technology of the shield in the bearing water stratum in China, and obtains good economic benefit and social benefit. The originating sealing device is suitable for shield originating construction engineering with poor stratum.
Description
Technical Field
The utility model belongs to the technical field of urban rail transit shield construction, and particularly relates to a permanent sealing structure for slurry shield initiation of a bearing water stratum.
Background
Along with the development of urban rail transit construction technology, rail transit is also built in each city, and particularly, coastal urban subway construction is in a peak period, and as most of shield intervals are started to be positioned in a pressure-bearing water stratum, steel sleeves are adopted for starting after ground reinforcement, and the starting process mainly has the following problems: (1) The ground is reinforced by double-pipe rotary spraying, the reinforcing range is large, the reinforcing period is long, and the reinforcing effect is poor; (2) The double pipe jet grouting reinforcement process is complex, the reinforcement cost is high, a large amount of waste slurry is generated in reinforcement, and the pollution is large; (3) The steel sleeve shield starting procedure is complex, steel sleeve deformation, water and sand gushing construction risks appear when the steel sleeve is removed and the negative ring is removed in the starting process, even important rain sewage pipes and gas pipes at the starting end sometimes affect end reinforcement, so that shield starting cannot be provided timely. Therefore, how to perform shield tunneling with low cost, safety, low carbon and rapidness becomes the technical problem of the current pressurized water stratum shield tunneling construction.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of utility model
The utility model aims to provide a permanent sealing structure for the slurry shield initiation of a bearing water stratum, which aims to solve the problems of the prior bearing water shield zone initiation end such as ground reinforcement construction period, high cost, complex initiation procedure by adopting a steel sleeve, high initiation water and sand surge risk and the like.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
A pressurized water formation slurry shield originated permanent seal structure, the permanent seal structure comprising: a pressure-bearing water stratum, a composite enclosing structure, an originating well main body structure and an originating precipitation relief well; foam boards are pre-embedded on the composite enclosure structure at the inner side of the originating portal; an originating door ring and a sealing grease injecting pipe are arranged on the originating well main body structure; a plurality of high-strength steel wire brushes are arranged in the starting portal ring.
Further, a muddy water slurry stopping plate is arranged on the front-section starting opening door ring of the high-strength steel wire brush.
Further, a hole door ring beam water-stopping steel plate is arranged on the rear-section starting hole door ring of the high-strength steel wire brush.
Further, the foam board has a thickness of 80cm.
Further, three high-strength steel wire brushes are arranged in the starting portal ring.
Further, the intervals between the three high-strength wire brushes were 20cm.
Further, the composite enclosure is made of C20 concrete.
Further, the thickness of the originating door ring is not less than 40cm.
Further, the distance between the muddy water slurry stopping plate and the outer side portal ring surface of the starting portal ring is 88cm.
Further, the distance between the water stopping steel plate of the portal ring beam and the outer portal ring surface of the originating portal ring is 30cm.
By adopting the technical scheme, the utility model has the following beneficial effects:
1. Optimizing the diaphragm wall into a composite enclosure structure, providing enough space for setting permanent seal, eliminating the diaphragm wall breaking process and the starting end reinforcement, and solving the problems of high cost, long construction period and large pollution of the traditional starting ground reinforcement;
2. The starting end adopts a measure of increasing the pressure reduction of the dewatering well, provides safety guarantee for starting, and solves the problems of water and sand burst in the traditional working procedures of starting, breaking the ground wall and the like;
3. Three steel wire brushes are arranged in the tunnel portal ring for automatically injecting grease, an elastic slurry stopping plate is arranged at the front end of the tunnel portal ring, and a sealing device is arranged at the rear end of the tunnel portal ring, so that the problems that the conventional steel sleeve is complicated in starting procedure, easy to deform and gush water in starting and the like are solved;
4. The permanent sealing arrangement is adopted, so that the difficult problem that the steel sleeve is dismounted and the negative ring is dismounted and the risk of water and sand gushing is solved.
In a word, the utility model has the advantages of safe construction, low cost, environment-friendly construction, short construction period, strong practicability, advanced technology and the like, and the originating sealing device is successfully applied to the originating construction of a subway shield, fills the blank of the originating sealing technology of the shield in the bearing water stratum in China, and obtains good economic benefit and social benefit. The originating sealing device is suitable for shield originating construction engineering with poor stratum.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will briefly explain the drawings needed in the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an originating well of the present utility model in a vertical section after construction;
FIG. 2 is a schematic longitudinal cross-sectional view of the utility model after installation of an originating seal;
FIG. 3 is a schematic longitudinal cross-sectional view of the shield of the present utility model after entry into the seal;
FIG. 4 is a schematic longitudinal section of the negative collar of the present utility model with the tabs removed;
FIG. 5 is a schematic view of the utility model in longitudinal section after construction of the portal ring beam.
In the figure: 1-bearing water stratum, 2-composite enclosure structure, 3-foam board, 4-originating well main structure, 5-originating opening door ring, 6-injection sealing grease pipe, 7-muddy water slurry stopping board, 8-high strength steel wire brush, 9-opening door ring beam water stopping steel plate, 10-originating precipitation relief well, 11-muddy water shield, 12-forming tunnel duct piece, 13-synchronous grouting consolidation body and 14-forming tunnel door ring beam.
Description of the embodiments
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
As shown in fig. 1-4, the present utility model provides a pressurized water formation slurry shield-originated permanent seal structure comprising: a pressure-bearing water stratum 1, a composite enclosing structure 2, an originating well main body structure 4 and an originating precipitation relief well 10; foam boards 3 are pre-buried on the composite enclosure structure 2 at the inner side of the originating tunnel portal; an originating door ring 5 and a sealing grease injecting pipe 6 are arranged on the originating well main body structure 4; a plurality of high-strength steel wire brushes 8 are arranged in the starting opening door ring 5.
In this embodiment, a slurry-stopping plate 7 is arranged on the front-section starting door ring 5 of the high-strength wire brush 8.
In the embodiment, a portal ring beam water stop steel plate 9 is arranged on the rear-section starting portal ring 5 of the high-strength steel wire brush 8.
In this embodiment, the foam board 3 has a thickness of 80cm.
In this embodiment, three high strength wire brushes 8 are provided within the originating door ring 5.
In this embodiment, the intervals between the three high-strength wire brushes 8 are 20cm.
In this embodiment, the composite enclosure 2 is made of C20 concrete.
In this embodiment, the thickness of the originating door ring 5 is not less than 40cm.
In this embodiment, the muddy water slurry-stopping plate 7 is located at a distance of 88cm from the outer portal annulus of the originating portal ring 5.
In this embodiment, the portal ring beam water stop steel plate 9 is 30cm from the outside portal ring surface of the originating portal ring 5.
The specific construction process of the utility model is as follows:
Step one: construction of originating structure
A. Constructing a composite enclosure structure with the thickness of 1.8 meters according to an optimized scheme, wherein the thickness of a foam template is 0.8 meter; B. 2-hole dewatering wells which are 8 meters deeper than the tunnel are respectively constructed at the position 3 meters away from the exterior of the enclosure structure and the outside of the tunnel; C. constructing a bottom plate after the foundation pit is excavated to the bottom; D. embedding an initial portal ring side wall, optimizing the side wall to be 1 m thick, and arranging a sealing grease injection pipe in the portal ring; E. constructing a middle plate and a top plate; F. and removing the foam board in the composite enclosure structure.
Step two: originating seal installation
A. According to the requirement that the thickness of the ring beam of the portal is not less than 40cm, the distance between the steel wire brushes 8 is designed to be 20cm, and a water stop steel plate of the ring beam of the portal is arranged 30cm away from the ring surface of the portal at the outer side; B. a steel wire brush is arranged 40cm, 60cm and 80 cm away from the ring surface of the outer side portal; C. and a muddy water slurry stopping plate is arranged at a position 88cm away from the annular surface of the outer side portal.
Step three: shield initiation
A. Starting a dewatering well when an initial seal is installed; B. the slurry shield 11 is assembled and debugged and then pushed to an originating tunnel portal; C. the seal grease injecting pipe is well connected with a shield tail grease injecting system; D. after the position of the assembling starting point of the negative ring is determined, starting to assemble the negative ring, ensuring that the end part of a first ring pipe piece of the formed tunnel is 40cm away from a door ring of the starting tunnel, and realizing that the sealing of the starting steel wire brush is not dismantled; E. injecting grease, establishing mud-water pressure of an excavation bin, and observing that the shield is started after the starting seal is free from water seepage; F. and starting synchronous grouting after all the shield tail brushes enter the initial sealing, and continuing initial tunneling.
Step four, negative ring dismantling and portal ring beam construction
A. Stopping shield tunneling after all the auxiliary materials enter the starting tunnel portal, and performing supplementary grouting on the starting section to form a synchronous grouting consolidation body 13; B. dismantling the negative ring segment and carrying out annular limiting fixed welding on the first ring segment to form a formed tunnel segment 12; C. binding reinforcing steel bars after cleaning the tunnel portal; D. pouring concrete after installing the templates, and manufacturing a formed tunnel portal ring beam 14; E. and restoring tunneling after removing the template.
Compared with the prior art, the application has at least the following innovation points:
1. And C20 composite enclosing structures with different thicknesses are adopted according to different starting burial depths, so that the safety of the starting tunnel portal and the abrasion of the starting cutter are ensured to be less than 2mm under the condition of no-end reinforcement. And a foam board with the thickness of 80cm is pre-buried at the inner side of the starting tunnel portal, so that the quick dismantling is ensured to provide space for installing and sealing.
2. And after the tunnel portal is 40cm away from the outer side of the initial tunnel portal, a seal is arranged, so that the lowest thickness of the ring beam of the formed tunnel portal is ensured. And sealing grease is injected by using a shield tail grease injection system of the shield, so that the automatic grease filling due to the change of the initial shield posture is realized, and the effectiveness of the initial sealing grease filling of the shield is ensured.
3. The slurry stopping plate is additionally arranged at the sealing front end of the steel wire brush, so that the slurry pressure in the slurry shield bin directly acts on the slurry stopping plate, sealing grease is prevented from overflowing, and the compression resistance of the steel wire brush is enhanced.
4. By installing the water stop plate at the back end of the initial seal to enhance the sealing effect and also combining the permanent water stop plate of the post-forming tunnel portal ring beam structure, all the sealing structures are not dismantled, the shield initial process is simplified, and the shield initial safety of the bearing water stratum and the construction quality of the forming tunnel portal ring beam are ensured.
The originating sealing structure is used for originating construction of a bearing water shield section of a certain city. The starting process is adopted on site, so that the problem of long traditional ground reinforcement period is solved; solves the problem that water and sand burst exist in the prior art of breaking the ground connection wall before the traditional process; solves the problems that the steel sleeve has complex starting procedure, easy deformation and water burst during starting and the like; the difficult problem of steel sleeve demolishs, the negative ring demolishs and faces gushing water gushing sand risk is solved. The method has the advantages of good effect, construction period assurance, advanced technology, cost saving, attractive appearance, environmental protection, quality assurance and strong practicability.
The method is popularized to the originating construction of other subway bearing water shield sections, so that the construction cost is greatly reduced, the construction period is shortened, the construction safety is ensured, and the construction process is simplified. The practicability is strong, the process is simple, the efficacy is high, the blank of the shield starting technology in the pressure-bearing water shield zone in China is filled, and the popularization prospect is good.
In addition, the application can properly optimize the composite enclosure structure, such as adopting other materials to replace the pre-buried foam board so as to realize the effects of meeting the sealing installation space and the like. The sealing structure can be optimized, such as an air bag and other structures are adopted to replace the slurry stopping plate, so that the influence on sealing caused by the slurry pressure of the originating development surface is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. A permanently sealed structure for slurry shield initiation of a pressurized water formation, the permanently sealed structure comprising: the system comprises a pressure-bearing water stratum (1), a composite enclosing structure (2), an originating well main body structure (4) and an originating precipitation relief well (10); foam boards (3) are pre-buried on the composite enclosure structure (2) at the inner side of the starting tunnel portal; an originating door ring (5) and a sealing grease injecting pipe (6) are arranged on the originating well main body structure (4); a plurality of high-strength steel wire brushes (8) are arranged in the starting opening door ring (5).
2. The pressure-bearing water stratum slurry shield starting permanent sealing structure according to claim 1, wherein a slurry stopping plate (7) is arranged on a front starting door ring (5) of the high-strength steel wire brush (8).
3. The pressure-bearing water stratum slurry shield starting permanent sealing structure according to claim 1, wherein a portal ring beam water stopping steel plate (9) is arranged on a rear starting portal ring (5) of the high-strength steel wire brush (8).
4. The pressurized water strata slurry shield initiation permanent seal structure according to claim 1, wherein the foam board (3) has a thickness of 80cm.
5. The pressurized water stratum slurry shield originating permanent sealing structure according to claim 1, wherein three high-strength steel wire brushes (8) are arranged in the originating door ring (5).
6. The pressurized water strata slurry shield initiation permanent seal structure according to claim 5, wherein the interval between the three high-strength wire brushes (8) is 20cm.
7. The pressurized water strata slurry shield initiation permanent seal structure according to claim 1, wherein the composite enclosure (2) is made of C20 concrete.
8. The pressurized water strata slurry shield initiation permanent seal structure according to claim 1, wherein the thickness of the initiation opening door ring (5) is not less than 40cm.
9. The pressurized water strata slurry shield initiation permanent seal structure according to claim 2, wherein the slurry stop plate (7) is spaced 88cm from the outer portal annulus of the initiation portal annulus (5).
10. A pressurized water strata slurry shield initiation permanent seal structure according to claim 3, wherein the distance from the outer portal annulus of the initiation portal ring (5) of the portal ring beam water stop steel plate (9) is 30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322574102.1U CN220909686U (en) | 2023-09-21 | 2023-09-21 | Pressure-bearing water stratum slurry shield originating permanent sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322574102.1U CN220909686U (en) | 2023-09-21 | 2023-09-21 | Pressure-bearing water stratum slurry shield originating permanent sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220909686U true CN220909686U (en) | 2024-05-07 |
Family
ID=90909942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322574102.1U Active CN220909686U (en) | 2023-09-21 | 2023-09-21 | Pressure-bearing water stratum slurry shield originating permanent sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220909686U (en) |
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2023
- 2023-09-21 CN CN202322574102.1U patent/CN220909686U/en active Active
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