CN107165645B - Major diameter slurry shield tunnel starts entrance to a cave sealing device - Google Patents
Major diameter slurry shield tunnel starts entrance to a cave sealing device Download PDFInfo
- Publication number
- CN107165645B CN107165645B CN201710607041.0A CN201710607041A CN107165645B CN 107165645 B CN107165645 B CN 107165645B CN 201710607041 A CN201710607041 A CN 201710607041A CN 107165645 B CN107165645 B CN 107165645B
- Authority
- CN
- China
- Prior art keywords
- portal
- steel ring
- stop layer
- elastic water
- steel
- Prior art date
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 65
- 239000002002 slurry Substances 0.000 title claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 197
- 239000010959 steel Substances 0.000 claims abstract description 197
- 239000004744 fabric Substances 0.000 claims abstract description 65
- 230000006835 compression Effects 0.000 claims description 24
- 238000007906 compression Methods 0.000 claims description 24
- 238000010276 construction Methods 0.000 claims description 19
- 230000000977 initiatory effect Effects 0.000 claims description 12
- 239000004519 grease Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 43
- 230000005641 tunneling Effects 0.000 abstract description 32
- 238000000034 method Methods 0.000 abstract description 14
- 230000009172 bursting Effects 0.000 abstract 1
- 238000009412 basement excavation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 241000282320 Panthera leo Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
-
- 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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0671—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes
-
- 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
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a large-diameter slurry shield tunnel starting portal sealing device, which comprises a main body structure, embedded steel rings embedded in the main body structure, wherein an extending portal steel ring is fixed on the embedded steel rings, a waterproof structure is arranged on the extending portal steel ring, and the waterproof structure is a first curtain cloth rubber plate and a second curtain cloth rubber plate which are axially arranged at intervals along the extending portal steel ring and radially arranged along the extending portal steel ring, and is characterized in that: the back of the first cord fabric rubber plate is fixed with an elastic water-stop layer, and grouting holes are formed in the extending portal steel ring between the first cord fabric rubber plate and the second cord fabric rubber plate. The sealing device for the large-diameter slurry shield tunnel starting portal has the water sealing capability, so that the sealing performance of the whole portal is improved, the phenomena of mud bursting, water burst and mud leakage in the process of tunneling the shield starting can be effectively prevented, and the safety of tunneling the shield starting is ensured.
Description
Technical Field
The invention relates to the technical field of shield tunnel engineering, in particular to a sealing device for an originating tunnel portal of a large-diameter slurry shield tunnel.
Background
The urban population of China is dense, and the ground traffic condition is tense. In order to improve and relieve urban ground traffic pressure, underground engineering is greatly developed in a heavy and popular large city in China, and shield construction is a mainstream construction method for urban subway tunnel, highway tunnel and the like. The existing shield used in underground engineering in China is mainly divided into an earth pressure balance shield and a slurry balance shield, wherein the slurry balance shield stabilizes a front soil body through pressure-adjustable slurry when the shield cuts the front soil body, and the slurry balance shield is in a sealing state in the whole tunneling process, so that the stability of the slurry balance shield to stratum is better than that of the earth pressure shield, and the slurry balance shield is more popular due to better stability and more reliable safety, and becomes an indispensable key technology for large river-crossing tunnels and urban subways. Along with the large-scale construction of urban subways and diversion tunnels in China, especially large-scale river-crossing tunnel engineering, the slurry shield tunnel technology is increasingly widely applied. The established projects such as Shanghai, nanjing and Wuhan tunnel crossing Yangtze river, south-to-north China tunnel crossing yellow, hangzhou Qianjiang tunnel crossing yellow, guangzhou Qianjiang special line lion ocean tunnel crossing in deep harbor are all constructed by adopting slurry shield construction, and slurry shield construction methods are prepared or adopted in the river crossing tunnel projects of subways and urban highway tunnels in multiple cities under construction. Slurry shield tunnel technology has become one of the key technologies essential to the important underground engineering construction field in China.
In slurry shield construction, the shield initiation entrance is one of important risk sources of shield construction, and particularly has extremely high requirements on the sealing performance of a shield initiation entrance when constructing in geological conditions with abundant groundwater and high groundwater level. In order to ensure the safety and rapidness of the initial tunneling of the shield, an extended tunnel portal sealing device is generally adopted for sealing the initial tunnel portal of the shield at present, so that the mud burst, water burst and mud leakage in the initial tunneling process of the shield (before the shield body does not completely enter the stratum) are prevented, and the initial tunneling safety of the shield is ensured. In the extended tunnel portal sealing device, for the slurry shield with larger diameter to start and excavate, the slurry circulation slag discharging mode is adopted during the slurry shield tunneling, and the stability of the excavated surface is maintained by the special slurry through pressurization. The slurry shield mud bin starts the initial tunneling process, and because the mud bin needs to build pressure, the tunnel portal is sealed to frequently generate serious slurry leakage phenomenon in the shield initial tunneling process, so that the shield mud bin cannot build pressure normally, the excavation surface is stable, the earth surface is settled, the shield initial tunneling posture is difficult to control, and the construction risks of tunnel face collapse, larger earth surface settlement, mud burst and water burst are increased.
In addition, in some special projects of shield tunneling machine starting and portal position relation, for example, a shield tunneling machine forms a certain included angle with the portal in the axial direction and the longitudinal direction. If a conventional tunnel portal sealing mode is adopted, the sealing effect of the tunnel portal cannot be ensured, and the slurry shield mud bin starts to start the tunneling process, and because the mud bin needs to be pressurized, the tunnel portal sealing often has a serious slurry leakage phenomenon in the tunneling process of the shield, so that the shield mud bin cannot be pressurized normally, the excavation face is stable, the earth surface subsides, the tunneling attitude of the shield is difficult to control, and the construction risks of collapse of the tunnel face, larger subsidence of the earth surface, mud burst and water burst are increased.
Disclosure of Invention
In order to better solve the problems in the prior art, the novel sealing device for the originating portal of the large-diameter slurry shield tunnel is provided.
In order to achieve the above object, the present invention has the technical scheme that: the utility model provides a major diameter slurry shield tunnel starts entrance to a cave sealing device, wherein, is in including major structure, buries pre-buried steel ring in the major structure be fixed with on the pre-buried steel ring and extend the entrance to a cave steel ring, be equipped with waterproof construction on the extension entrance to a cave steel ring, waterproof construction is along extending the first curtain cloth rubber slab and the second curtain cloth rubber slab that the entrance to a cave steel ring axial interval set up and radially arranged along extending the entrance to a cave steel ring, its characterized in that: the back of the first cord fabric rubber plate is fixed with an elastic water-stop layer, and grouting holes are formed in the extending portal steel ring between the first cord fabric rubber plate and the second cord fabric rubber plate.
The embedded steel ring at the front side of the first curtain cloth rubber plate is provided with a shield tail slurry-stopping plate, the shield tail slurry-stopping plates are uniformly distributed along the circumference of the embedded portal steel ring, the shield tail slurry-stopping plates are welded in a sealing manner, and an elastic water-stopping layer is fixed on the back surface of the shield tail slurry-stopping plate.
At least one steel wire brush is arranged on the pre-buried steel ring at the front side of the first cord fabric rubber plate, the steel wire brushes are uniformly distributed along the circumference of the pre-buried portal steel ring, the steel wire brushes are welded in a sealing manner, and an elastic water-stopping layer is fixed on the back of the steel wire brush.
The invention also discloses another major diameter slurry shield tunnel starting portal sealing device, which comprises a main body structure, an embedded steel ring embedded in the main body structure, an extending portal steel ring fixed on the embedded steel ring, a waterproof structure arranged on the extending portal steel ring, wherein the waterproof structure is a first curtain cloth rubber plate and a second curtain cloth rubber plate which are axially arranged at intervals along the extending portal steel ring and radially arranged along the extending portal steel ring, and is characterized in that: the novel steel ring comprises a pre-buried steel ring and an extending steel ring, wherein the steel ring is arranged between the pre-buried steel ring and the extending steel ring, at least one steel wire brush is arranged on the steel ring, the steel wire brushes are uniformly distributed along the circumference of the steel ring, the steel wire brushes are welded in a sealing manner, an elastic water-stop layer is fixed on the back of each steel wire brush, and grease injection holes are formed in the steel ring between the steel wire brushes and a first cord fabric rubber plate.
The steel wire brushes are two, the distance between the two steel wire brushes is 70-100cm, the steel wire brushes are obliquely connected to the inner wall of the steel ring of the tunnel portal, and the included angle between the steel wire brushes and the direction of the entering hole of the steel ring of the tunnel portal is 40-70 degrees.
The shield tail slurry-stopping plate is obliquely connected to the inner wall of the pre-buried portal steel ring, and the included angle between the shield tail slurry-stopping plate and the hole-entering direction of the pre-buried portal steel ring is 40-70 degrees.
The front side of the first cord fabric rubber plate is provided with two steel wire brushes, the steel wire brushes are obliquely connected to the inner wall of the steel ring of the embedded door, and the included angle between the steel wire brushes and the direction of the embedded door steel ring entering the hole is 40-70 degrees.
The elastic water-stopping layer is a high-density sponge with the density of more than or equal to 35 kg/m.
The shape of the longitudinal section of the elastic water-stop layer is triangle or trapezoid. The shape and the size of the longitudinal section of the elastic water-stop layer are changed due to different distances between the shield shell of the shield machine and the tunnel portal.
The ratio of the elastic water-stop layer before compression to the elastic water-stop layer after compression is 1.6-2.0, so that the damage to a curtain cloth rubber plate, a shield tail slurry-stop plate or a steel wire brush fixed by the elastic water-stop layer is prevented.
An elastic water stop layer locating piece is arranged on the steel ring at the front side of the elastic water stop layer and used for controlling the elastic water stop layer in a space formed by the compressed cord fabric rubber plate, the shield tail slurry stop plate or the steel wire brush, the steel ring and the water stop layer locating piece, so that the elastic water stop layer is prevented from falling off in the shield tunneling process.
Advantageous effects
1. The sealing device for the large-diameter slurry shield tunnel starting portal has the water sealing capability, so that the sealing performance of the whole portal is improved. According to the invention, the elastic water-stopping layer is added behind the curtain rubber plate or the shield tail slurry-stopping plate or the steel wire brush, so that the curtain rubber plate or the shield tail slurry-stopping plate or the steel wire brush is better combined with the shield body surface, and the elastic water-stopping layer consisting of high-density sponge also has a certain water-stopping function, so that the sealing of the tunnel portal has good water-sealing slurry-stopping capability, the sealing performance of the whole tunnel portal is improved, and the phenomena of mud burst, water burst and mud leakage in the tunneling process of the shield initiation can be effectively prevented, so that the tunneling safety of the shield initiation is ensured.
2. The sealing device for the main tunnel starting portal of the large-diameter slurry shield tunnel is convenient to install, economical and practical and convenient to popularize. According to the invention, the technical scheme that the high-density sponge elastic water-stopping layer is added on the curtain rubber plate or the shield tail slurry-stopping plate or the steel wire brush can meet the sealing and slurry-stopping requirements of the starting tunnel portal, and the invention is economical, practical, convenient to install and convenient to popularize and use.
Drawings
FIG. 1 is a schematic illustration of a prior art originating portal sealing device;
FIG. 2 is a schematic view of the structure of the originating portal sealing device of embodiment 1;
FIG. 3 is a schematic view showing the structure of the use state of the originating portal sealing device of embodiment 1;
FIG. 4 is a schematic diagram of the planar positional relationship between the shield machine and the originating portal in example 1;
FIG. 5 is a schematic diagram of the positional relationship between the shield machine and the longitudinal section of the originating tunnel portal in example 1;
FIG. 6 is a schematic diagram of the cross-sectional positional relationship between a shield machine and an originating tunnel portal in example 1;
FIG. 7 is a schematic view showing the shape and fixing position of the upper part of the elastic water-blocking layer in example 1;
FIG. 8 is a schematic view showing the shape and the fixed position of the middle part of the elastic water-blocking layer in example 1;
FIG. 9 is a schematic view showing the shape and the fixed position of the lower part of the elastic water-blocking layer in example 1;
FIG. 10 is a schematic view of the structure of the originating portal sealing device of example 2;
FIG. 11 is a schematic view showing the structure of the use state of the originating portal sealing device of embodiment 2;
FIG. 12 is a schematic view of the structure of the originating portal sealing device of embodiment 3;
FIG. 13 is a schematic view showing the construction of the sealing device for an originating portal in accordance with the use state of example 3
FIG. 14 is a schematic view of the structure of the originating portal sealing device of example 4;
FIG. 15 is a schematic view showing the structure of the use state of the originating portal sealing device of embodiment 4;
in the figure, a main body structure 1, an embedded steel ring 2, an extended portal steel ring 3, a first curtain cloth rubber plate 4, a second curtain cloth rubber plate 5, an elastic water-stop layer 6, grouting holes 7, an elastic water-stop layer positioning piece 8, a shield tail slurry-stop plate 9, a steel wire brush 10, a portal steel ring 11, a grease injection hole 12, a shield cutter disc 13 and a shield body 14.
Detailed Description
The invention will be further described by means of specific examples in conjunction with the accompanying drawings. The following examples are illustrative only and not intended to limit the scope of the invention.
The back surface of the invention refers to the inclined surface of the first curtain cloth rubber plate after being pressed, and the front surface refers to the advancing direction of the shield tunneling.
Example 1
The large-diameter slurry shield tunnel originating portal sealing device in the embodiment is used in He Jiang and Xiang Jiang tunnel engineering in He Yang, city and North of He Yang, east shore is a Zhuhui region, west shore is a stone drum region, and is positioned at the position of three water catchments of Xiangjiang, leisha water and steam, is about 2.4km away from the downstream of the water catchment, is about 0.2km away from the upstream of the water catchment, and the shield tunnel adopts a double-hole type and adopts a 11710mm large-diameter air cushion slurry shield tunneling construction. The inner diameter of the duct piece is 10.3m, the outer diameter is 11.3m, the building limit is 8.5 multiplied by 4.5m, the duct piece is divided into two lines of south and north which pass through Xiangjiang, wherein the total length of a main line single hole is about 1867.2m.
The shield originating well is located in the Huanjiang east coast of the Zhuhui region of the Hengyang city, and the receiving well is located in the Huanjiang west coast of the Hengyang city stone drum region. The distance between the shield starting portal and Hunan river is only 100m, the underground water is rich, the underground water level is high, and the shield starting portal is mainly stratum fracture pressure-bearing water, and has extremely high requirements on the sealing performance of the shield starting portal. In addition, the position relation between the initiation of the shield machine and the portal in the engineering is special, see fig. 4, 5 and 6, and the shield machine has a certain included angle with the portal in the transverse direction and the longitudinal direction, for example, a conventional portal sealing mode is adopted, see fig. 1, so that the sealing effect of the portal cannot be ensured.
Referring to fig. 2, fig. 3, fig. 7-fig. 9, a sealing device for a major diameter slurry shield tunnel originating portal comprises a main body structure 1, an embedded steel ring 2 embedded in the main body structure 1, an extended portal steel ring 3 fixed on the embedded steel ring 2, a waterproof structure arranged on the extended portal steel ring 3, wherein the waterproof structure is a first curtain rubber plate 4 and a second curtain rubber plate 5 which are axially arranged at intervals along the extended portal steel ring 3 and radially arranged along the extended portal steel ring 3, and is characterized in that: an elastic water-stop layer 6 is fixed on the back of the first curtain cloth rubber plate 4, and grouting holes 7 are formed in the extending portal steel ring 3 between the first curtain cloth rubber plate 4 and the second curtain cloth rubber plate 5. The elastic water-stop layer 6 is a high-density sponge with a density of more than or equal to 35 kg/m.
An elastic water stop layer locating piece 8 is arranged on the embedded steel ring 2 at the front side of the elastic water stop layer 6 and is used for controlling the elastic water stop layer 6 in a space formed by the compressed first cord fabric rubber plate 4, the embedded steel ring 2 and the water stop layer locating piece 8 where the elastic water stop layer 6 is located, so that the elastic water stop layer 6 is prevented from moving forward and falling off after being pressed in the shield tunneling process.
The ratio of the elastic water-stop layer 6 before compression to the elastic water-stop layer after compression is 1.6-2.0, so that the first cord fabric rubber plate 4 fixed by the elastic water-stop layer is prevented from being damaged. The ratio of the elastic water-stop layer 6 before compression to the elastic water-stop layer after compression in this example was 1.8.
In order to meet the requirement of the sealing effect of the shield oblique body starting filling, the shape and the size of the longitudinal section (in the axial direction of the tunnel) of the elastic water-stop layer 6 are obtained according to the distance between the starting tunnel portal and the shield shell of the shield machine, in this embodiment, since the starting shield machine starts in oblique lines, see fig. 4, 5 and 6, the positions of the shield shell of the shield machine and the position of the starting tunnel portal are different, so that the shape and the size of the longitudinal section of the elastic water-stop layer 6 are also different, the triangular section elastic water-stop layer 6 is adopted on the shield body 14 close to the tunnel face, and the trapezoidal section elastic water-stop layer 6 is adopted on the shield body 14 far from the tunnel face. In the embodiment, the distance between the shield shell of the shield machine and the originating portal is 134mm at the upper part, 324mm at the lower part and 230mm at the left and right middle parts. In order to enable the elastic waterproof layer 6 to effectively exert elastic waterproof performance and not damage the sponge, the elastic waterproof layer 6 is installed according to three different shapes and sizes of an upper part, a middle part and a lower part of the upper diameter and the lower diameter of the lower diameter. Referring to fig. 7, the longitudinal section of the elastic water-blocking layer 6 is triangular, wherein the side length of the side contacted with the first elastic rubber plate 4 is 507mm, the side length of the side contacted with the embedded steel ring 2 after compression is 424mm, and the remaining side length is 321mm; referring to fig. 8, the longitudinal section of the elastic water-blocking layer 6 is in the shape of an equilateral triangle, wherein the side length of the side contacted with the first elastic rubber sheet 4 is 530mm, the side length of the side contacted with the embedded steel ring 2 after compression is 447mm, and the remaining side length is 447mm; referring to fig. 9, the longitudinal section of the elastic water-stop layer 6 is in a right trapezoid shape, wherein the side length of the side contacted with the first elastic rubber plate 4 is 530mm, the side length of the side contacted with the first elastic rubber plate 4 is 260mm, the side length of the side contacted with the embedded steel ring 2 is 331mm, in order to prevent the elastic water-stop layer 6 from falling off in the shield tunneling process, the shape of the elastic water-stop layer 6 is controlled under the curtain rubber plate, and the side contacted with the embedded steel ring 2 is adhered on the embedded steel ring 2 by sponge rubber (or segment sealant). When the sponge is stuck by using sponge rubber (the duct piece rubber is also useful and the solidification time is slightly long), the surface of the sponge is required to be rough, and the glue coating is required to be thick and is not lower than 3mm.
The sealing effect of the sealing device for the originating portal of the large-diameter slurry shield tunnel provided by the embodiment of the invention
When the shield machine is empty to push through the sponge area, the speed cannot be too high, and the pushing speed is uniform (4-5 cm/min). After the cutter head is used for preventing the elastic water-stop layer 6 from being totally stressed, the cutter head is checked to be not fallen off, the curtain cloth rubber plate is uniformly contacted with the cutter head (shield shell) without obvious gaps, the initial tunneling tunnel portal of the shield machine basically has no slurry leakage phenomenon, the sealing condition of the initial tunnel portal is good, the full-bin tunneling is established after the shield is started, after the shield is driven for 5m, the pressure at the top of the mud bin can be established by 0.3-0.6bar, and the normal pressure establishment can be realized after the tunnel portal is sealed. And (3) starting tunneling to +3 ring, completing the sealing of the tunnel portal, starting synchronous grouting normal tunneling by +4 ring starting normal pressure building, and starting tunneling, wherein the tunneling parameters of the 4 rings are shown in the following table before tunneling.
Example 2
Referring to fig. 10 and 11, a major diameter slurry shield tunnel originating portal sealing device comprises a main body structure 1, a pre-buried steel ring 2 buried in the main body structure 1, an extension portal steel ring 3 fixed on the pre-buried steel ring 2, a waterproof structure arranged on the extension portal steel ring 3, wherein the waterproof structure is a first curtain cloth rubber plate 4 and a second curtain cloth rubber plate 5 which are axially arranged at intervals along the extension portal steel ring 3 and radially arranged along the extension portal steel ring 3, an elastic water-blocking layer 6 is fixed on the back of the first curtain cloth rubber plate 4, and grouting holes 7 are arranged on the extension portal steel ring 3 between the first curtain cloth rubber plate 4 and the second curtain cloth rubber plate 5. The embedded steel ring 2 at the front side of the first curtain cloth rubber plate 4 is provided with a shield tail slurry-stopping plate 9, the axial distance between the shield tail slurry-stopping plate 9 and the first curtain cloth rubber plate 4 needs to meet the requirement that the end of the first curtain cloth rubber plate 4 cannot exceed the end of the shield tail slurry-stopping plate 9 after the shield body 14 is extruded and overturned (the slurry-stopping plate is prevented from cutting the curtain cloth rubber plate), and the axial distance is determined according to the fact that the overlapping length of the first curtain cloth rubber plate 4 and the shield tail slurry-stopping plate 9 after the first curtain cloth rubber plate 4 and the shield tail slurry-stopping plate 9 are pressed and overturned is not greater than 50% of the length of the slurry-stopping plate, and the fact that the shield tail slurry-stopping plate 9 is pressed and overturned does not influence the cutter head to gather the excavation surface and then rotates is ensured. The shield tail slurry-stopping plates 9 are uniformly distributed along the circumference of the embedded steel ring 2, the shield tail slurry-stopping plates 9 are welded in a sealing mode, and an elastic water-stopping layer 6 is fixed on the back face of each shield tail slurry-stopping plate 9. The elastic water-stop layer 6 is a high-density sponge with a density of more than or equal to 35 kg/m. The shield tail slurry-stopping plate 9 is obliquely connected to the inner wall of the embedded steel ring 2, the included angle between the shield tail slurry-stopping plate 9 and the hole-entering direction of the embedded steel ring 2 is 40-70 degrees, and the included angle between the shield tail slurry-stopping plate 9 and the hole-entering direction of the embedded steel ring 2 in the embodiment is 70 degrees.
An elastic water stop layer locating piece 8 is arranged on the embedded steel ring at the front side of the elastic water stop layer 6 and is used for controlling the elastic water stop layer 6 in a space formed by the compressed first cord fabric rubber plate 4/shield tail slurry stop plate 9, the embedded steel ring 2 and the water stop layer locating piece 8 where the elastic water stop layer 6 is located, so that the elastic water stop layer 6 is prevented from moving forward and falling off after being pressed in the shield tunneling process.
The ratio of the elastic water-stop layer 6 before compression to the elastic water-stop layer after compression is 1.6-2.0, so that the first curtain cloth rubber plate 4 or the shield tail slurry-stop plate 9 fixed by the elastic water-stop layer is prevented from being damaged. The ratio of the elastic water-stop layer 6 before compression to the elastic water-stop layer after compression in this example was 1.6.
The shape and the size of the longitudinal section of the elastic water-stop layer 6 are obtained according to the distance between the starting portal and the shield shell of the shield machine, in this embodiment, the distance between the starting portal and the shield shell of the shield machine is approximately the same, the shape and the size of the longitudinal section of the elastic water-stop layer 6 are the same, and the shape of the longitudinal section of the elastic water-stop layer 6 is triangular.
Example 3
Referring to fig. 12 and 13, a major diameter slurry shield tunnel originating portal sealing device comprises a main body structure 1, an embedded steel ring 2 embedded in the main body structure 1, an extended portal steel ring 3 fixed on the embedded steel ring 2, a waterproof structure arranged on the extended portal steel ring 3, wherein the waterproof structure is a first curtain rubber plate 4 and a second curtain rubber plate 5 which are axially arranged at intervals along the extended portal steel ring 3 and radially arranged along the extended portal steel ring 3, and is characterized in that: an elastic water-stop layer 6 is fixed on the back of the first curtain cloth rubber plate 4, and grouting holes 7 are formed in the extending portal steel ring 3 between the first curtain cloth rubber plate 4 and the second curtain cloth rubber plate 5. At least one steel wire brush 10 is arranged on the pre-buried steel ring 2 at the front side of the first cord fabric rubber plate 4, the steel wire brushes 10 are uniformly distributed along the circumference of the pre-buried steel ring 2, the steel wire brushes 10 are welded in a sealing way, and an elastic water-stopping layer 6 is fixed at the back of the steel wire brush 10. The elastic water-stop layer 6 is a high-density sponge with a density of more than or equal to 35 kg/m. In this embodiment, a steel wire brush 10 is disposed on the front side of the first cord fabric rubber plate 4, the steel wire brush 10 is obliquely connected to the inner wall of the embedded steel ring 2, the included angle between the steel wire brush 10 and the embedded steel ring 2 in the hole entering direction is 40-70 degrees, and in this embodiment, the included angle between the steel wire brush 10 and the embedded steel ring 2 in the hole entering direction is 70 degrees. The axial distance between the steel wire brush 10 and the first cord fabric rubber plate 4 is determined according to the fact that the overlap length of the first cord fabric rubber plate 4 and the steel wire brush 10 after the first cord fabric rubber plate 4 and the steel wire brush 10 are pressed and overturned is not more than 50% of the length of the steel wire brush 10, and the fact that the cutter head is pressed and overturned and then rotated after the excavation surface is closed is guaranteed.
An elastic water stop layer locating piece 8 is arranged on the embedded steel ring 2 at the front side of the elastic water stop layer 6 and is used for controlling the elastic water stop layer 6 in a space formed by the compressed first cord fabric rubber plate 4 or the steel wire brush 10, the embedded steel ring 2 and the water stop layer locating piece 8 where the elastic water stop layer 6 is located, so that the elastic water stop layer 6 is prevented from moving forward and falling off after being pressed in the shield tunneling process.
The ratio of the elastic water-stop layer 6 before compression to the elastic water-stop layer after compression is 1.6-2.0, so that the first cord fabric rubber plate 4 or the wire brush 10 fixed by the elastic water-stop layer is prevented from being damaged. The ratio of the elastic water-stop layer 6 before compression to the elastic water-stop layer after compression in this embodiment is 2.0.
The shape and the size of the longitudinal section of the elastic water-stop layer 6 are obtained according to the distance between the starting portal and the shield shell of the shield machine, in this embodiment, the distance between the starting portal and the shield shell of the shield machine is approximately the same, the shape and the size of the longitudinal section of the elastic water-stop layer 6 are the same, and the shape of the longitudinal section of the elastic water-stop layer 6 is trapezoid.
Example 4
Referring to fig. 14 and 15, a sealing device for a major diameter slurry shield tunnel starting tunnel portal comprises a main body structure 1, an embedded steel ring 2 embedded in the main body structure 1, an extended tunnel portal steel ring 3 fixed on the embedded steel ring 2, a waterproof structure arranged on the extended tunnel portal steel ring 3, a first curtain fabric rubber plate 4 and a second curtain fabric rubber plate 5 arranged at intervals along the axial direction of the extended tunnel portal steel ring 3 and along the radial direction of the extended tunnel portal steel ring 3, a tunnel portal steel ring 11 arranged between the embedded steel ring 2 and the extended tunnel portal steel ring 3, at least one steel wire brush 10 arranged on the embedded steel ring 11, wherein the steel wire brushes 10 are uniformly distributed along the circumference of the tunnel portal steel ring, sealing welding is carried out between the steel wire brushes 10, an elastic water-blocking layer 6 is fixed on the back of the steel wire brush 10, and grease injecting holes 12 are arranged on the tunnel portal steel ring between the steel wire brushes 10 and the first curtain fabric rubber plate 4.
The number of the steel wire brushes 10 is two, the distance between the two steel wire brushes 10 is 70-100cm, the distance in the embodiment is 83cm, the steel wire brushes 10 are obliquely connected to the inner wall of the steel ring 11 of the tunnel portal, and the included angle between the steel wire brushes 10 and the direction of the entering hole of the steel ring 11 of the tunnel portal is 40-70 degrees, and the included angle in the embodiment is 50 degrees.
An elastic water stop layer locating piece 8 is arranged on a portal steel ring 11 at the front side of the elastic water stop layer 6 and used for controlling the elastic water stop layer 6 in a space formed by a compressed steel wire brush 10, the embedded steel ring 2 and the water stop layer locating piece 8 where the elastic water stop layer 6 is located, so that the elastic water stop layer 6 is prevented from moving forward and falling off after being pressed in the shield tunneling process.
The ratio of the elastic water-blocking layer 6 before compression to the elastic water-blocking layer after compression is 1.6-2.0, thereby preventing damage to the wire brush 10 to which it is fixed. The ratio of the elastic water-stop layer 6 before compression to the elastic water-stop layer after compression in this example was 1.8.
The shape and the size of the longitudinal section of the elastic water-stop layer 6 are obtained according to the distance between the starting portal and the shield shell of the shield machine, in this embodiment, the distance between the starting portal and the shield shell of the shield machine is approximately the same, the shape and the size of the longitudinal section of the elastic water-stop layer 6 are the same, and the shape of the longitudinal section of the elastic water-stop layer 6 is triangular.
Example 5
Under the condition that the longitudinal space of the initial tunnel portal of the shield is allowed, namely, after the shield cutter disc 13 pushes up the excavation surface of the tunnel portal, enough space exists between the cutter disc and the first cord fabric rubber plate 4, two steel wire brushes 10 can be directly added on the embedded steel ring 2, and an elastic water-stop layer 6 is fixed on the back surface of the steel tail brush 10, and in the embodiment, the other embodiments are the same as the embodiment 4 except the differences (not shown in the figure).
Claims (9)
1. The utility model provides a major diameter slurry shield tunnel starts entrance to a cave sealing device, includes the major structure, buries in pre-buried steel loop in the major structure be fixed with on the pre-buried steel loop and extend the entrance to a cave steel loop, be equipped with waterproof construction on the extension entrance to a cave steel loop, waterproof construction is for setting up and along extending the first curtain cloth rubber slab and the second curtain cloth rubber slab that the entrance to a cave steel loop radial was arranged along extending the entrance to a cave steel loop axial interval, its characterized in that: the novel high-density grouting device is characterized in that an elastic water-stop layer is fixed on the back of the first curtain cloth rubber plate, grouting holes are formed in an extending portal steel ring between the first curtain cloth rubber plate and the second curtain cloth rubber plate, a shield tail slurry-stop plate is arranged on an embedded steel ring at the front side of the first curtain cloth rubber plate, the shield tail slurry-stop plates are uniformly distributed along the circumference of the embedded portal steel ring, the shield tail slurry-stop plates are hermetically welded, an elastic water-stop layer is fixed on the back of the shield tail slurry-stop plate, the shield tail slurry-stop plate is obliquely connected onto the inner wall of the embedded portal steel ring, the included angle between the shield tail slurry-stop plate and the embedded portal steel ring in the hole entering direction is 40-70 degrees, and the elastic water-stop layer is a high-density sponge with the density of more than or equal to 35 kg/m.
2. The large diameter slurry shield tunnel initiation portal sealing device of claim 1, wherein: at least one steel wire brush is arranged on the pre-buried steel ring at the front side of the first cord fabric rubber plate, the steel wire brushes are uniformly distributed along the circumference of the pre-buried portal steel ring, the steel wire brushes are welded in a sealing manner, and an elastic water-stopping layer is fixed on the back of the steel wire brush.
3. The large diameter slurry shield tunnel initiation portal sealing device of claim 2, wherein: the front side of the first cord fabric rubber plate is provided with two steel wire brushes, the steel wire brushes are obliquely connected to the inner wall of the steel ring of the embedded door, and the included angle between the steel wire brushes and the direction of the embedded door steel ring entering the hole is 40-70 degrees.
4. A large diameter slurry shield tunnel initiation portal sealing device as claimed in claim 1 or claim 2 wherein: the shape of the longitudinal section of the elastic water-stop layer is triangular or trapezoidal, and an elastic water-stop layer positioning piece is arranged on the steel ring at the front side of the elastic water-stop layer.
5. A large diameter slurry shield tunnel initiation portal sealing device as claimed in claim 1 or claim 2 wherein: the ratio of the elastic water-stop layer before compression to the elastic water-stop layer after compression is 1.6-2.0.
6. The utility model provides a major diameter slurry shield tunnel starts entrance to a cave sealing device, includes the major structure, buries in pre-buried steel loop in the major structure be fixed with on the pre-buried steel loop and extend the entrance to a cave steel loop, be equipped with waterproof construction on the extension entrance to a cave steel loop, waterproof construction is for setting up and along extending the first curtain cloth rubber slab and the second curtain cloth rubber slab that the entrance to a cave steel loop radial was arranged along extending the entrance to a cave steel loop axial interval, its characterized in that: the embedded steel ring and the extending portal steel ring are provided with a portal steel ring, at least one steel wire brush is arranged on the portal steel ring, the steel wire brushes are uniformly distributed along the circumference of the portal steel ring, the steel wire brushes are welded in a sealing manner, an elastic water-stop layer is fixed on the back of each steel wire brush, a grease injection hole is formed in the portal steel ring between the steel wire brush and the first cord fabric rubber plate, the included angle between the steel wire brush and the portal steel ring in the hole entering direction is 40-70 degrees, and the elastic water-stop layer is a high-density sponge with the density of more than or equal to 35 kg/m.
7. The large diameter slurry shield tunnel initiation portal sealing device of claim 6, wherein: the steel wire brushes are two, the distance between the two steel wire brushes is 70-100cm, and the steel wire brushes are obliquely connected to the inner wall of the steel ring of the tunnel portal.
8. The large diameter slurry shield tunnel initiation portal sealing device of claim 6, wherein: the shape of the longitudinal section of the elastic water-stop layer is triangular or trapezoidal, and an elastic water-stop layer positioning piece is arranged on the steel ring at the front side of the elastic water-stop layer.
9. The large diameter slurry shield tunnel initiation portal sealing device of claim 6, wherein: the ratio of the elastic water-stop layer before compression to the elastic water-stop layer after compression is 1.6-2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710607041.0A CN107165645B (en) | 2017-07-24 | 2017-07-24 | Major diameter slurry shield tunnel starts entrance to a cave sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710607041.0A CN107165645B (en) | 2017-07-24 | 2017-07-24 | Major diameter slurry shield tunnel starts entrance to a cave sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165645A CN107165645A (en) | 2017-09-15 |
| CN107165645B true CN107165645B (en) | 2023-08-15 |
Family
ID=59818149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710607041.0A Active CN107165645B (en) | 2017-07-24 | 2017-07-24 | Major diameter slurry shield tunnel starts entrance to a cave sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107165645B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026151A (en) * | 2018-10-17 | 2018-12-18 | 中铁隧道局集团有限公司 | Big cross section rectangular top pipe tunnel portal sealing device and its installation method |
| CN109736832B (en) * | 2019-01-07 | 2024-03-08 | 中铁十一局集团城市轨道工程有限公司 | Device and method for sealing initial end portal when shield tunneling machine starts to pass through existing shield tunnel |
| CN110005421B (en) * | 2019-04-10 | 2023-09-22 | 中铁十九局集团轨道交通工程有限公司 | Sealing device and sealing method for subway tunnel originating tunnel portal by sandy soil layer shield method |
| CN110219658B (en) * | 2019-07-25 | 2024-04-12 | 中建八局轨道交通建设有限公司 | Device for preventing shield tunneling machine from head planting and use method thereof |
| CN111878110B (en) * | 2020-07-31 | 2022-06-10 | 中交隧道工程局有限公司 | Tunnel portal plugging device and method for shield tunnel starting |
| CN112228086A (en) * | 2020-09-29 | 2021-01-15 | 中铁二局集团有限公司 | Shield tail outer side grout stopping device and construction method thereof |
| CN113803080A (en) * | 2021-08-10 | 2021-12-17 | 广州轨道交通建设监理有限公司 | Shield tunneling machine initiating method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007023499A (en) * | 2005-07-12 | 2007-02-01 | Taisei Corp | Segment, water cut-off structure, and construction method for shield tunnel |
| CN201802412U (en) * | 2010-01-27 | 2011-04-20 | 北京市政建设集团有限责任公司 | Waterproof silicone rubber seal gasket of thermal shield tunnel segment |
| CN102444409A (en) * | 2011-12-29 | 2012-05-09 | 同济大学 | Elastic sealing pad for sealing seams among shield tunnel pipe segments by utilizing water pressure |
| CN203835402U (en) * | 2014-05-29 | 2014-09-17 | 中交隧道工程局有限公司 | Starting portal sealing structure of slurry shield tunnel |
| CN104265332A (en) * | 2014-08-06 | 2015-01-07 | 上海隧道工程有限公司 | Waterstop device and waterstop construction method suitable for large-section rectangular pipe jacking starting |
| CN204477513U (en) * | 2015-01-21 | 2015-07-15 | 广东省基础工程集团有限公司 | A kind of push pipe starts portal water sealing structure |
| CN104912573A (en) * | 2015-06-22 | 2015-09-16 | 中铁二院工程集团有限责任公司 | Gate temporary waterstop device of shield tunnel |
| CN205154194U (en) * | 2015-12-07 | 2016-04-13 | 中铁十一局集团城市轨道工程有限公司 | Stagnant water of shield tunnel portal department ends husky structure |
| CN106437788A (en) * | 2016-11-16 | 2017-02-22 | 中铁二院工程集团有限责任公司 | Active compaction device for elastic sealing pad for shield tunnel segment |
| CN106948829A (en) * | 2017-04-29 | 2017-07-14 | 中铁局集团有限公司 | A kind of slurry shield originates portal sealing structure and its construction method |
| CN207297010U (en) * | 2017-07-24 | 2018-05-01 | 中铁隧道股份有限公司 | Major diameter slurry shield tunnel originates portal sealing device |
-
2017
- 2017-07-24 CN CN201710607041.0A patent/CN107165645B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007023499A (en) * | 2005-07-12 | 2007-02-01 | Taisei Corp | Segment, water cut-off structure, and construction method for shield tunnel |
| CN201802412U (en) * | 2010-01-27 | 2011-04-20 | 北京市政建设集团有限责任公司 | Waterproof silicone rubber seal gasket of thermal shield tunnel segment |
| CN102444409A (en) * | 2011-12-29 | 2012-05-09 | 同济大学 | Elastic sealing pad for sealing seams among shield tunnel pipe segments by utilizing water pressure |
| CN203835402U (en) * | 2014-05-29 | 2014-09-17 | 中交隧道工程局有限公司 | Starting portal sealing structure of slurry shield tunnel |
| CN104265332A (en) * | 2014-08-06 | 2015-01-07 | 上海隧道工程有限公司 | Waterstop device and waterstop construction method suitable for large-section rectangular pipe jacking starting |
| CN204477513U (en) * | 2015-01-21 | 2015-07-15 | 广东省基础工程集团有限公司 | A kind of push pipe starts portal water sealing structure |
| CN104912573A (en) * | 2015-06-22 | 2015-09-16 | 中铁二院工程集团有限责任公司 | Gate temporary waterstop device of shield tunnel |
| CN205154194U (en) * | 2015-12-07 | 2016-04-13 | 中铁十一局集团城市轨道工程有限公司 | Stagnant water of shield tunnel portal department ends husky structure |
| CN106437788A (en) * | 2016-11-16 | 2017-02-22 | 中铁二院工程集团有限责任公司 | Active compaction device for elastic sealing pad for shield tunnel segment |
| CN106948829A (en) * | 2017-04-29 | 2017-07-14 | 中铁局集团有限公司 | A kind of slurry shield originates portal sealing structure and its construction method |
| CN207297010U (en) * | 2017-07-24 | 2018-05-01 | 中铁隧道股份有限公司 | Major diameter slurry shield tunnel originates portal sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107165645A (en) | 2017-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107165645B (en) | Major diameter slurry shield tunnel starts entrance to a cave sealing device | |
| Lee et al. | Ground response to the construction of Shanghai metro tunnel-line 2 | |
| CN105298507B (en) | A kind of underground pipe gallery construction method of top open cut bottom tunneler construction | |
| CN105221168B (en) | Shield method tunnel construction portal Water sealing method under the conditions of a kind of rich water is buried | |
| LU101977B1 (en) | Shield system capable of effectively reducing disturbance of surrounding rocks | |
| CN102518470B (en) | Method for preventing and controlling water by using freezing pipes in annular water intercepting tunnel | |
| CN104989412A (en) | Earth pressure balance type shield long-distance lake-crossing construction technology | |
| CN103899323A (en) | Construction method of shield passing through railway yard | |
| CN110017145A (en) | A kind of sea area shield mine joins jointing and its construction method in Tunnel | |
| CN103291312B (en) | The shield machine of three-dimensional slip casting can be realized | |
| CN104806262A (en) | Six-cutter head rectangular tube pushing machine | |
| CN112664221A (en) | Pipe jacking construction method for complex geological formation | |
| CN210564541U (en) | Quick heading machine | |
| Wu et al. | Rock mechanical problems and optimization for the long and deep diversion tunnels at Jinping II hydropower station | |
| CN111828094B (en) | Deep-buried earth pressure balance shield hole-entering double-air-bag sealing device and sealing method thereof | |
| CN205206847U (en) | Shield constructs business turn over hole portal annular and freezes sealed sealing device | |
| CN207297010U (en) | Major diameter slurry shield tunnel originates portal sealing device | |
| CN203347799U (en) | Shield tunneling machine capable of achieving three-dimensional grouting | |
| CN206655715U (en) | A kind of efficient drainage arrangement in tunnel | |
| CN215256188U (en) | Overlapping shield tunnel foundation treatment structure for next-to-old house | |
| CN115949084A (en) | Fiber cloth bag grouting plugging method applied to mud burst and water burst in karst area | |
| CN213088018U (en) | Shield constructs down and wears building to prevent supporting construction of settlement control | |
| CN214273662U (en) | Shield constructs in-connection structure in mine handing-over tunnel | |
| CN114893223A (en) | Safe construction method for penetrating middle dike seepage wall of underground excavation tunnel | |
| CN205296194U (en) | Rich irrigated land layer undercut tunnel interlock pipe curtain |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |