CN217976244U - Shield constructs originating and sealed integrated system of tunnel portal - Google Patents
Shield constructs originating and sealed integrated system of tunnel portal Download PDFInfo
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- CN217976244U CN217976244U CN202221881009.4U CN202221881009U CN217976244U CN 217976244 U CN217976244 U CN 217976244U CN 202221881009 U CN202221881009 U CN 202221881009U CN 217976244 U CN217976244 U CN 217976244U
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Abstract
The utility model discloses a shield constructs originating and arrives portal seal integrated system, including installing pre-buried portal ring and the sealing device in shield portal department, sealing device includes annular rigid seal component and annular flexible seal component, annular rigid seal component includes the first annular steel sheet of being connected with the outer crown plate of pre-buried portal ring, pre-buried in the intra-annular second annular steel sheet of section of jurisdiction, the third annular steel sheet that both ends are connected with first annular steel sheet and second annular steel sheet respectively and locate the first annular steel sheet, second annular steel sheet, the filling layer between the third annular steel sheet, be equipped with a plurality of slip casting pipes on the third annular steel sheet; the annular flexible sealing component comprises an annular rubber cord fabric and a cord fabric pressing plate, one end of the annular rubber cord fabric is arranged on an outer annular plate of the embedded hole door ring under the extrusion of the cord fabric pressing plate, the end of the annular rubber cord fabric is attached to the first annular steel plate, and the other end of the annular rubber cord fabric is arranged on the second annular steel plate. The utility model has the advantages that: simple structure and good sealing effect.
Description
Technical Field
The utility model belongs to the technical field of the technique of shield structure method tunnel construction and specifically relates to a shield constructs originating and arrives portal sealing integrated system.
Background
In more and more urban subway traffic construction, the shield method is widely applied because the construction speed is high and the influence on the overground construction is small. The shield is easy to control in normal tunneling, but the risk is higher in the starting and receiving stages of the shield, the shield starting is a series of operation processes that the shield machine on a starting bracket is pushed into a reinforcing body by the shield machine through equipment or facilities such as a reaction frame, a negative ring segment and the like, then enters an undisturbed soil section of a stratum and tunnels along a designed line. The shield arrival is a penetration stage of pushing out the soil to a receiving well along a route while keeping the surrounding soil stable after the shield machine finishes the construction of the interval tunnel. However, under the complex geological conditions of high water and rich water, water burst and sand burst at the tunnel portal can easily occur if the end reinforcement quality is not good, so that the normal starting and arrival receiving of the shield are directly influenced. At present, when the ground space is limited or peripheral risks are large and the end reinforcement cannot be carried out, a horizontal reinforcement method is often adopted. But there is still a great risk of shield launch and arrival reception due to the consolidation process and cost limitations, as well as the abundance of groundwater. In order to solve the problem of water burst when the shield starts and reaches the tunnel portal, the method is an indispensable link for sealing the tunnel portal in shield construction, and plays a vital role in successfully starting and receiving the shield.
The conventional tunnel door sealing method adopts a sealing device in a folding flap and cord fabric rubber structural form. In addition, in the actual use process, due to the flexibility of the cord fabric rubber, the cord fabric rubber cannot be completely and tightly attached and sealed with the shield shell of the shield machine, so that water burst at the tunnel portal cannot be completely sealed, and if grouting is carried out at the tunnel portal, the grouting pressure is not uniform, and the phenomenon of slurry leakage cannot be avoided. When the water burst is large or the time is long, a major safety accident is easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a shield constructs and starts and reach the sealed integrated system in portal according to above-mentioned prior art, through setting up pre-buried portal ring and sealing device in shield structure portal department, has realized the sealing up to the shield structure portal.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
a shield constructs and originates and arrives portal sealing integrated system which characterized in that: the shield tunnel portal structure comprises a pre-buried tunnel portal ring and a sealing device, wherein the pre-buried tunnel portal ring and the sealing device are installed at a shield tunnel portal, the sealing device comprises an annular rigid sealing component and an annular flexible sealing component, the annular rigid sealing component comprises a first annular steel plate connected with an outer ring plate of the pre-buried tunnel portal ring, a second annular steel plate pre-buried in a segment ring, a third annular steel plate and a filling layer, the two ends of the third annular steel plate are respectively connected with the first annular steel plate and the second annular steel plate, and the filling layer is arranged among the first annular steel plate, the second annular steel plate and the third annular steel plate; the annular flexible sealing component comprises an annular rubber curtain cloth and a curtain cloth pressing plate, one end of the annular rubber curtain cloth is arranged on an outer annular plate of the pre-buried doorway ring under the extrusion of the curtain cloth pressing plate, the end of the annular rubber curtain cloth is attached to the first annular steel plate, and the other end of the annular rubber curtain cloth is arranged on the second annular steel plate.
And a fourth annular steel plate is embedded in the duct piece ring, and the fourth annular steel plate is connected with the inner annular plate of the embedded portal ring through an annular sealing connection steel plate.
And a supporting rib plate is arranged between the outer side of the second annular steel plate and the outer side of the third annular steel plate.
The curtain cloth pressing plate is formed by hinging a fixed pressing plate and a movable pressing plate.
The annular rubber curtain cloth and the curtain cloth pressing plate are connected with the outer ring plate of the embedded opening door ring through embedded nuts and fixing bolts.
And the grouting pipe is connected with grouting equipment through a grouting ball valve.
The utility model has the advantages that: the sealing effect between the shield segment and the tunnel portal is ensured, the sealing effect between the shield segment and the pre-buried tunnel portal ring is ensured, the whole sealing structure is simple, the cost is low, the slurry can be completely sealed, and the sealing effect is good.
Drawings
FIG. 1 is a schematic overall plan view of the integrated seal system of the present invention;
FIG. 2 is a partial enlarged view of A in FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic structural view of the first and third annular steel plates of the present invention;
FIG. 5 is a schematic structural view of a fourth annular steel plate according to the present invention;
FIG. 6 is a schematic diagram of the middle shield tunneling machine after entering the tunnel;
FIG. 7 is a schematic view of the present invention with the zeroth ring removed;
FIG. 8 is a schematic diagram of the middle shield tunneling machine after going out of the tunnel;
fig. 9 is a schematic diagram of the present invention with the receiving ring removed.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in figures 1-9, the marks 1-15 in the figures are respectively represented as a pre-buried tunnel door ring 1, a first annular steel plate 2, a second annular steel plate 3, a third annular steel plate 4, a grouting pipe 5, a grouting ball valve 6, an annular rubber curtain cloth 7, a curtain cloth pressing plate 8, a pre-buried nut 9, a fixing bolt 10, a fourth annular steel plate 11, an annular sealing connecting steel plate 12, a station end wall 13, a supporting rib plate 14 and a filling layer 15.
Example (b): as shown in fig. 1 to 9, the present embodiment relates to a comprehensive shield launching and arrival portal sealing system, which is used for sealing a shield launching and arrival portal, and mainly includes a pre-buried portal ring 1 and a sealing device installed at a shield portal, the pre-buried portal ring 1 is installed in a station end wall 13, the sealing device includes an annular rigid sealing member and an annular flexible sealing member, the annular rigid sealing member is composed of a first annular steel plate 2, a second annular steel plate 3, a third annular steel plate 4 and a filling layer 15, wherein one end of the first annular steel plate 2 is welded to an outer ring plate of the pre-buried portal ring 1, and the other end of the first annular steel plate extends outwards, the second annular steel plate 3 is pre-buried in a zero ring and a receiving ring, and two ends of the third annular steel plate 4 are welded to the first annular steel plate 2 and the second annular steel plate 3, respectively. The annular flexible sealing component consists of an annular rubber curtain cloth 7 and a curtain cloth pressing plate 8, wherein the annular rubber curtain cloth 7 consists of three sections, the curtain cloth pressing plate 8 is formed by hinging a fixed pressing plate and a movable pressing plate, the angle between a first section of the annular rubber curtain cloth 7 and a second section of the annular rubber curtain cloth 7 can be adjusted by adjusting the angle between the movable pressing plate and the fixed pressing plate, specifically, one end (the first section) of the annular rubber curtain cloth 7 is arranged on an outer annular plate of the embedded hole door ring 1 under the extrusion of the curtain cloth pressing plate 8 (the fixed pressing plate), the end of the annular rubber curtain cloth 7 is attached to the first annular steel plate 2, and the other end (the third section) of the annular rubber curtain cloth 7 is arranged on the second annular steel plate 3. The first annular steel plate 2, the second annular steel plate 3, the third annular steel plate 4 and the annular rubber cord fabric 7 can form a closed space, and the filling layer 15 is arranged in the space.
As shown in fig. 1-3, a plurality of grouting pipes 5 are arranged on the third annular steel plate 4, and the grouting pipes 5 are connected with grouting equipment through grouting ball valves 6. The grouting equipment injects grouting materials (cement mortar or polyurethane) into a closed space formed by the first annular steel plate 2, the second annular steel plate 3, the third annular steel plate 4 and the annular rubber curtain cloth 7 through the grouting pipe 5 to form a filling layer 15.
As shown in fig. 3, the annular rubber curtain cloth 7 and the curtain cloth pressing plate 8 are connected with the outer ring plate of the pre-buried tunnel door ring 1 through pre-buried nuts 9 and fixing bolts 10 for fixing the annular rubber curtain cloth 7 and the curtain cloth pressing plate 8, wherein the pre-buried nuts 9 are arranged in a station end wall 13. And a supporting rib plate 14 is arranged between the outer side of the second annular steel plate 3 and the outer side of the third annular steel plate 4 and used for reinforcing the connection between the second annular steel plate 3 and the third annular steel plate 4.
As shown in fig. 3 and 5, a fourth annular steel plate 11 is embedded in the first ring and the last ring, the fourth annular steel plate 11 is connected with the inner ring plate of the embedded door ring 1 through an annular sealing connection steel plate 12, and the annular sealing connection steel plate 12 is welded with the fourth annular steel plate 11 and the inner ring plate of the embedded door ring 1.
In this embodiment, the first annular steel plate 2, the second annular steel plate 3, the third annular steel plate 4, the fourth annular steel plate 11 and the annular sealing connection steel plate 12 can be formed by splicing a plurality of arc-shaped steel plates.
As shown in fig. 1 to 9, the present embodiment also has the following construction method:
1. when the shield segment is prefabricated, a second annular steel plate 3 is embedded in a zero ring and a receiving ring, and a fourth annular steel plate 11 is embedded in an end face of a first ring and an end face of a last ring.
2. Before the shield machine starts, an annular flexible sealing component and a first annular steel plate 2 are arranged on an outer annular plate of a pre-buried tunnel portal ring 1 outside a tunnel portal. Before the shield machine enters or excavates the portal, the portal is broken in advance, the portal is required to be broken until the inner layer steel bars are completely exposed, and in the embodiment, the first annular steel plate 2 is only provided with 4/5 of the circle on the upper part. After the shield machine passes through the annular flexible sealing component, a zero ring is pulled out from the tail of the shield machine, then the first annular steel plate 2 is welded on the outer end face of the outer ring plate of the pre-buried tunnel door ring 1, the third annular steel plate 4 and the support rib plate 14 are installed, and meanwhile, a grouting material (cement mortar or polyurethane) is filled in the grouting pipe 5.
3. The shield machine continues to advance, after the shield machine removes the negative ring and hangs out the starting bracket, the shield well muck is cleaned, the 1/5 circle of the lower part of the first annular steel plate 2 is installed, the third annular steel plate 4 and the support rib plate 14 are installed, and meanwhile, a grouting material (cement mortar or polyurethane) is filled in the grouting pipe 5.
4. And the shield tunneling machine continues to move forward again, after the cutter head of the shield tunneling machine reaches the starting tunnel door and the dregs are cleaned, the first annular steel plate 2 of the whole ring is installed, and the third annular steel plate 4 and the support rib plate 14 are installed at the same time in the same installation mode as the starting installation mode.
5. After the annular rigid sealing component is installed, a shield body of the shield tunneling machine starts to pass through the tunnel portal, and when the shield body passes through the annular flexible sealing component, a first seal is formed between the shield body and the pre-buried tunnel portal ring 1 through the annular flexible sealing component. And when the shield tail of the shield tunneling machine is pulled out of the receiving ring and the distance between the end surface and the outside of the external portal ring is 30-50cm, welding a third annular steel plate 4 between the shield tail of the shield tunneling machine and the first annular steel plate 2 to perform second sealing.
6. After the second sealing is finished, cement mortar or polyurethane material is adopted, the gap outside the pipe piece is fully grouted compactly, and after the slurry is condensed, the shield machine is pushed out of the external tunnel portal.
7. After the shield tunneling is finished, and the zero ring and the receiving ring are removed, the gap between the fourth annular steel plate 11 and the pre-buried tunnel portal ring 1 is sealed by the annular sealing connecting steel plate 12, the connection mode adopts welding, and the tunnel portal ring beam construction can be carried out after the annular sealing connecting steel plate 12 is installed.
In addition, in the step 2, a plurality of grouting pipes 5 with grouting ball valves 6 are arranged on the third annular steel plate 4, when flowing water exists after the shield tunneling machine passes through the grouting pipes, the grouting pipes are sealed through a second seal, and after grouting sealing is completed, the valves are closed. The outer diameter of the fourth annular steel plate 11 installed in the step 2, the step 3 and the step 7 is equal to the inner diameter of a station pre-buried steel ring, the inner diameter of the fourth annular steel plate is smaller than the outer diameter of the segment and larger than the inner diameter of the segment, the width of the fourth annular steel plate is larger than the gap between the outer diameter of the first ring (the last ring) and the inner diameter of the pre-buried tunnel portal ring 1 by more than 10cm, the fourth annular steel plate and the shield segment form a sealed whole, the safety of the tunnel portal is guaranteed during the launching and receiving of the shield, and meanwhile, after the zero ring and the receiving ring are detached, the sealing of the tunnel portal ring beam is guaranteed to form a sealing system, and further, the construction safety of the tunnel portal ring beam is guaranteed.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description thereof is not repeated herein.
Claims (6)
1. A shield constructs and originates and arrives portal seal integrated system which characterized in that: the shield tunnel portal structure comprises a pre-buried tunnel portal ring and a sealing device, wherein the pre-buried tunnel portal ring and the sealing device are installed at a shield tunnel portal, the sealing device comprises an annular rigid sealing component and an annular flexible sealing component, the annular rigid sealing component comprises a first annular steel plate connected with an outer ring plate of the pre-buried tunnel portal ring, a second annular steel plate pre-buried in a segment ring, a third annular steel plate and a filling layer, the two ends of the third annular steel plate are respectively connected with the first annular steel plate and the second annular steel plate, and the filling layer is arranged among the first annular steel plate, the second annular steel plate and the third annular steel plate; the annular flexible sealing component comprises an annular rubber curtain cloth and a curtain cloth pressing plate, one end of the annular rubber curtain cloth is arranged on an outer annular plate of the pre-buried doorway ring under the extrusion of the curtain cloth pressing plate, the end of the annular rubber curtain cloth is attached to the first annular steel plate, and the other end of the annular rubber curtain cloth is arranged on the second annular steel plate.
2. The integrated shield launch and reach tunnel portal seal system of claim 1, wherein: and a fourth annular steel plate is embedded in the duct piece ring, and the fourth annular steel plate is connected with the inner annular plate of the embedded portal ring through an annular sealing connection steel plate.
3. The integrated shield launch and arrival portal seal system of claim 1, wherein: and a supporting rib plate is arranged between the outer side of the second annular steel plate and the outer side of the third annular steel plate.
4. The integrated shield launch and arrival portal seal system of claim 1, wherein: the curtain cloth pressing plate is formed by hinging a fixed pressing plate and a movable pressing plate.
5. The integrated shield launch and arrival portal seal system of claim 1, wherein: the annular rubber curtain cloth and the curtain cloth pressing plate are connected with the outer annular plate of the embedded opening door ring through embedded nuts and fixing bolts.
6. The integrated shield launch and arrival portal seal system of claim 1, wherein: and the grouting pipe is connected with grouting equipment through a grouting ball valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022203772795 | 2022-02-24 | ||
| CN202220377279 | 2022-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217976244U true CN217976244U (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221881009.4U Active CN217976244U (en) | 2022-02-24 | 2022-07-21 | Shield constructs originating and sealed integrated system of tunnel portal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217976244U (en) |
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2022
- 2022-07-21 CN CN202221881009.4U patent/CN217976244U/en active Active
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