CN111188632A - Sea area corrosive environment high performance durability shield constructs section of jurisdiction lining structure - Google Patents
Sea area corrosive environment high performance durability shield constructs section of jurisdiction lining structure Download PDFInfo
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- CN111188632A CN111188632A CN202010179358.0A CN202010179358A CN111188632A CN 111188632 A CN111188632 A CN 111188632A CN 202010179358 A CN202010179358 A CN 202010179358A CN 111188632 A CN111188632 A CN 111188632A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920001971 elastomer Polymers 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 22
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- 238000000034 method Methods 0.000 claims description 11
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- 230000001360 synchronised effect Effects 0.000 claims description 4
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- 239000004814 polyurethane Substances 0.000 claims 2
- 238000012856 packing Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 16
- 238000013461 design Methods 0.000 abstract description 7
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
- E21D11/386—Sealing means positioned between adjacent lining members inflatable sealing means
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a high-performance durable shield segment lining structure in a sea area corrosive environment, which comprises high-performance concrete segments, tenon-shaped connections, high-performance corrosion-resistant bolts, multiple waterproof systems and the like, wherein the high-performance concrete segments are fixedly connected through the high-performance corrosion-resistant bolts, the tenon-shaped connections are annularly used for controlling assembly, all seams are sealed and waterproof through the multiple waterproof systems, a reinforcing grouting system is arranged between the back of each high-performance concrete segment and the ground, and the reserved reinforcing space is arranged on the inner side of each high-performance concrete segment. The invention can improve the durability of the whole system of the lining materials, the connection, the water resistance, the construction quality and the like of the submarine shield tunnel, meet the structural bearing capacity, realize the good water resistance of the joint, obviously improve the lining construction quality of the shield segment, enhance the corrosion resistance, realize the good durability and ensure the safe service of the submarine shield tunnel within the design service life.
Description
Technical Field
The invention belongs to the technical field of design and construction of tunnels and underground engineering, and particularly relates to a high-performance durable shield segment lining structure for a sea area corrosive environment.
Background
At present, the submarine tunnel is still in a starting stage in China, and the adopted construction methods mainly comprise a shield method and a mine method. For a submarine tunnel constructed by a shield method, a tunnel structure is buried in soil below the seabed, and the tunnel structure is affected by harmful media in the contacted soil, underground water and marine climate, and particularly under the composite influence of load and environment, the performance of materials and even the structure can be degraded along with time. The chemical compositions of underground water in the sea area of the submarine tunnel and the position close to the sea are similar to that of seawater, and the content of chloride ions is basically the same as that of the seawater or even higher than that of the seawater. The Shenzhen Qiangwan cable tunnel is the first submarine shield method tunnel in China, is built in 2005, and has obvious deterioration in carbonization and strength of segment concrete found in 2014 in 2 months; the corrosion condition of the connecting bolts among shield ring pieces in the tunnel is serious, and the average corrosion rate of the tail ends of the bolts reaches 80 percent, the average corrosion rate of nuts reaches 92.3 percent, the average corrosion rate of bolt gaskets reaches 99.5 percent, and the loosening phenomenon and the water leakage condition of partial bolts with serious corrosion are shown by sampling inspection statistics. Particularly, the rust phenomenon is more serious in the place with poor flatness of the spliced joints.
At present, researches on the durability of the submarine tunnel mainly focus on the strength and materials of reinforced concrete in a tunnel structure, such as analysis of a chloride ion corrosion resistance mechanism of secondary lining concrete, development of a C50 high-strength concrete mixing ratio test, a concrete durability detection method and the like. However, the durability of the shield tunnel structure has many factors, including the structure and material of the shield segment, the connecting member, the waterproof system, the grouting system and the like, and all the links are paid attention. The main reasons are that water leakage is caused by joint dislocation, shield joint waterproof failure and the like in the construction stage, and then a segment connecting bolt and a concrete lining are corroded. The durability design of the shield tunnel can not only pay attention to the material and the proportion of the concrete with the two linings, but also should adopt comprehensive measures in various aspects such as duct piece design, convenience for construction quality improvement, maintainability in the later period and the like.
Disclosure of Invention
The invention aims to overcome the defects of the durability of the tunnel lining segment of the shield method in the current situation in the sea area environment, provides a high-performance durable shield segment lining structure in the sea area corrosion environment, meets the structural bearing capacity, realizes good waterproof performance of a joint, improves the durability of the segment structure, has a simple structural form and a simple construction method process, obviously improves the shield segment lining construction quality, enhances the corrosion resistance, realizes good durability, and ensures the safe service of the submarine shield tunnel within the design service life.
The technical scheme adopted by the invention is as follows: the utility model provides a sea area corrosive environment high performance durability shield constructs section of jurisdiction lining structure, a serial communication port, including high performance concrete section of jurisdiction, tenon form connection, high performance corrosion-resistant bolt, multiple waterproof system, enhancement slip casting system and reservation reinforcement space, polylith the high performance concrete section of jurisdiction passes through high performance corrosion-resistant bolted connection is fixed, and the hoop passes through tenon form connection control assembles, and each seam passes through multiple waterproof system is waterproof in sealing, the high performance concrete section of jurisdiction sets up behind the back and between the stratum it packs closely to strengthen the slip casting system, high performance concrete section of jurisdiction inboard sets up reservation reinforcement space is used for the maintenance reinforcement in later stage, and above-mentioned structure links to each other in proper order and makes up and form durability shield and constructs section of jurisdiction structure.
The high-performance concrete pipe piece is made of C55 and P12 reinforced concrete, the crack development width limit value is 0.15mm, and the thickness of the steel bar protective layer is increased to 55 mm. The concrete adopts mineral admixture with larger mixing amount, and modified polypropylene fiber is added at the same time. The mineral admixture is fly ash with stable performance and ground slag powder, the quality grade of the fly ash is not lower than grade II in class F, the content of free calcium oxide is not more than 1.0 percent, and the slag powder is not lower than grade S95. The mixing amount of the modified polypropylene fiber is about 1.5kg/m3。
The high-performance concrete pipe pieces are arranged into 6-9 blocks and are assembled to form a circular tunnel section. And (2) coating a multifunctional concrete protective agent on the concrete on the back of the high-performance concrete pipe sheet and the outer side of the joint sealing gasket, wherein the material is high-permeability modified epoxy paint, and the coating is performed in multiple times, wherein the first coating is performed at 0.2-0.25 kg/m2Second brushing 0.2-0.25 kg/m2。
The polylith set up the distributing type between the circumferential weld is assembled to the high performance concrete section of jurisdiction tenon form is connected, tenon form is connected for the circular structure of concave-convex formula, and height 30mm sets up 1 ~ 3 on every section of jurisdiction, and the precision is assembled to the effective control section of jurisdiction, reduces the seam and misplaces the platform.
The high-performance corrosion-resistant bolts are adopted for the longitudinal and circumferential connection of the high-performance concrete pipe pieces, the bolts are arc-shaped bent bolts, the grade is A4L-80P, and the minimum tensile strength is 800 MPa; the mechanical performance of the nut is 8.0 grade; the gasket has a mechanical performance rating of 200 Hv. The materials of the bolt, the nut and the washer are all 316L stainless steel. The production process is cold heading forming, assembling gaskets for combination and passivating the combination bolt.
The multiple waterproof system is arranged at the joint of the pipe piece, and multiple waterproof devices are arranged from outside to inside and comprise a chloroprene sponge rubber water retaining strip, a porous elastic rubber sealing gasket, a water-swelling sealing gasket, a butyronitrile cork rubber liner plate, a foam rod and a polyurethane sealant; the chloroprene sponge rubber water retaining strip is arranged on the outer side of the segment seam; the porous elastic rubber sealing gasket is arranged in the groove on the outer side of the duct piece, and ethylene propylene diene monomer is selected; the water-swelling sealing gasket is arranged in the inner side groove, and a polyether polyurethane elastomer is selected; adhering the butyronitrile cork rubber liner plate on the back jack surface of the tenon-shaped joint and the annular seam of the duct piece; and local caulking is performed in the range of the top and the bottom of the tunnel, and the caulking material adopts the foam rod and the polyurethane sealant.
Before the porous elastic sealing gasket is produced, waterproof tests and durability tests are carried out when the straight seams, the cross seams and the T-shaped seams are assembled, so as to detect and verify whether the material and the structure of the designed sealing material meet the requirements of waterproof and durability.
The reinforced grouting system is characterized in that 1-3 grouting holes are reserved in the high-performance concrete pipe piece, synchronous grouting is carried out in the shield tunneling process, and secondary supplementary grouting is carried out behind the high-performance concrete pipe piece along the reserved grouting holes, so that the gap between the pipe piece and the stratum is tightly filled.
The reserved reinforcing space is a 250mm thick reinforcing space reserved between the inner side of the high-performance concrete segment and the building clearance, conditions are reserved for later-stage maintenance reinforcing and prolonging the service life of the structure, and concrete or steel structures and the like can be adopted for reinforcing.
The invention has the beneficial effects that:
1. the invention realizes the improvement of the durability of the whole system of the lining materials, the connection, the water resistance, the construction quality and the like of the submarine shield tunnel, and can ensure the safe service of the submarine shield tunnel within the designed service life;
2. the invention solves the problem of durability protection of key weak links such as shield segment connection, seams and the like, and can ensure the safety and reliability of the structure;
3. the invention has simple structure, convenient construction and operation, small construction risk and good waterproof effect, and simultaneously reserves convenient measures for later maintenance.
Drawings
FIG. 1 is a schematic cross-sectional layout of the structure of the present invention;
FIG. 2 is a schematic plan view of the structure of the present invention;
FIG. 3 is an expanded schematic view of a high performance concrete segment of the present invention;
FIG. 4 is a schematic plan view of a dovetail connection of the present invention;
fig. 5 is a schematic view showing the construction of the multiple waterproof system of the present invention.
In the figure, 1-high-performance concrete pipe piece, 2-tenon-shaped connection, 3-high-performance corrosion-resistant bolt, 4-multiple waterproof system, 5-reinforced grouting system, 6-reserved reinforcing space, 7-chloroprene sponge rubber water retaining strip, 8-porous elastic rubber sealing gasket, 9-water-swelling sealing gasket, 10-butyronitrile cork rubber gasket board, 11-foam rod and 12-polyurethane sealant.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention discloses a high-performance durable shield segment lining structure in a sea area corrosive environment, which comprises a high-performance concrete segment 1, tenon-shaped connections 2, high-performance corrosion-resistant bolts 3, a multiple waterproof system 4, a reinforcing grouting system 5 and reserved reinforcing spaces 6, wherein a plurality of high-performance concrete segments 1 are fixedly connected through the high-performance corrosion-resistant bolts 3, the annular direction is controlled to be assembled through the tenon-shaped connections 2, each joint is sealed and waterproof through the multiple waterproof system 4, the reinforcing grouting system 5 is arranged between the back of the high-performance concrete segment 1 and the stratum and is densely filled, and the reserved reinforcing spaces 6 are arranged on the inner side of the high-performance concrete segment 1 and are used for later-stage maintenance and reinforcement.
The high-performance concrete segment 1 is made of C55, P12 and above high-performance reinforced concrete, the crack development width limit value is 0.15mm, and the thickness of the steel bar protection layer is increased to 55 mm. The concrete adopts mineral admixture with larger mixing amount, and modified polypropylene fiber is added at the same time. The mineral admixture is fly ash with stable performance and ground slag powder, the quality grade of the fly ash is not lower than grade II in class F, the content of free calcium oxide is not more than 1.0 percent, and the slag powder is not lower than grade S95. The mixing amount of the modified polypropylene fiber is about 1.5kg/m3。
High performance concrete segment 1 sets up to 6 ~ 9 pieces, assembles and forms circular tunnel section. The multifunctional concrete protective agent is coated on the concrete on the back surface of the high-performance concrete segment 1 and the outer side of the joint sealing gasketThe material is coated with high-permeability modified epoxy paint in several times, the first coating is 0.2kg/m2Second brushing 0.25kg/m2。
The distributed tenon-shaped connection 2 is arranged between the assembling circular seams of the multiple high-performance concrete segments 1, the tenon-shaped connection 2 is of a concave-convex circular structure with the height of 30mm, 1 to 3 segments are arranged on each segment, the assembling precision of the segments is effectively controlled, and the joint dislocation is reduced.
The high-performance concrete duct piece 1 adopts high-performance corrosion-resistant bolts 3 in longitudinal and circumferential connection, the bolts are arc-shaped bent bolts with the grade of A4L-80P, and the minimum tensile strength is 800 MPa; the mechanical performance of the nut is 8.0 grade; the gasket has a mechanical performance rating of 200 Hv. The materials of the bolt, the nut and the washer are all 316L stainless steel. The production process is cold heading forming, assembling gaskets for combination and passivating the combination bolt.
The multiple waterproof system 4 is arranged at the joint of the pipe piece, and multiple waterproof devices are arranged from outside to inside and comprise a chloroprene sponge rubber water retaining strip 7, a porous elastic rubber sealing gasket 8, a water-swelling sealing gasket 9, a butyronitrile cork rubber liner plate 10, a foam rod 11 and a polyurethane sealant 12; a chloroprene sponge rubber water retaining strip 7 is arranged on the outer side of the segment seam; a porous elastic rubber sealing gasket 8 is arranged in the groove on the outer side of the duct piece, and ethylene propylene diene monomer is selected; the water-swelling sealing gasket 9 is arranged in the inner side groove, and a polyether polyurethane elastomer is selected; a butyronitrile cork rubber liner plate 10 is stuck on the back jack surface at the annular seam of the duct piece and the tenon-shaped connection 2; local caulking is performed in the range of the top and the bottom of the tunnel, and the caulking materials adopt a foam rod 11 and polyurethane sealant 12.
Before the porous elastic sealing gasket 8 is produced, waterproof tests and durability tests are carried out when the straight seams, the cross seams and the T-shaped seams are assembled, so as to detect and verify whether the material and the structure of the designed sealing material meet the requirements of waterproof and durability.
Strengthen slip casting system 5 for reserve on high performance concrete section of jurisdiction 1 and establish 1 ~ 3 slip casting holes, after the shield structure tunnelling process carries out synchronous slip casting, it is right along reserving the slip casting hole high performance concrete section of jurisdiction carries out the secondary and supplyes slip casting behind one's back, guarantees that the space is filled closely knit between section of jurisdiction and the stratum.
The reserved reinforcing space 6 is a 250mm thick reinforcing space reserved between the inner side of the high-performance concrete segment 1 and a building limit, conditions are reserved for later-stage maintenance reinforcing and prolonging the service life of the structure, and concrete or steel structures and the like can be adopted for reinforcing.
The invention discloses a high-performance durable shield segment lining structure for a sea area corrosive environment, which is applied to construction of tunnels passing through a sea subway interval, and comprises the following steps of:
(1) paying off and positioning according to a design drawing, prefabricating a high-performance concrete pipe piece in a factory according to the requirement of a pipe piece material, and arranging tenon-shaped connection;
(2) installing multiple waterproof system components such as a chloroprene sponge rubber water bar, a porous elastic rubber sealing gasket, a water-swelling sealing gasket, a nitrile cork rubber liner plate and the like at the joint of the prefabricated pipe piece;
(3) carrying out underground excavation construction of a normal shield method section, assembling shield high-performance concrete pipe lining, connecting and fixing the circular seams and the longitudinal seams by high-performance corrosion-resistant bolts, and carrying out synchronous grouting;
(4) secondary and multiple grouting is carried out by using a reinforced grouting system, so that the back of the duct piece is closely attached to surrounding rocks; local caulking is carried out on the top and bottom of the tunnel by adopting a foam rod and polyurethane sealant;
(5) the high-performance concrete duct pieces are assembled into a ring, and the reserved reinforcing space is considered to be used for later maintenance and reinforcement, so that a high-performance durable duct piece lining structure of a sea area corrosive environment is formed.
The structure and the construction method are suitable for the design and construction of the over-sea and underwater shield tunnels or shield tunnels with corrosive environments. In the shield tunneling process, the posture of the shield tunneling machine is controlled by attention, and the installation precision of the duct piece is ensured.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. The utility model provides a sea area corrosive environment high performance durability shield constructs section of jurisdiction lining structure, a serial communication port, including high performance concrete section of jurisdiction, tenon form connection, high performance corrosion-resistant bolt, multiple waterproof system, enhancement slip casting system and reservation reinforcement space, polylith the high performance concrete section of jurisdiction passes through high performance corrosion-resistant bolted connection is fixed, and the hoop passes through tenon form connection control assembles, and each seam passes through multiple waterproof system is waterproof in a sealing manner, the high performance concrete section of jurisdiction passes through behind one's back and between the stratum it is closely knit to strengthen the filling system packing, high performance concrete section of jurisdiction inboard sets up reservation reinforcement space.
2. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: the high-performance concrete pipe piece is made of C55 and P12 reinforced concrete, the crack development width limit value is 0.15mm, and the thickness of the steel bar protective layer is 55 mm.
3. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: 6-9 high performance concrete pipe pieces are assembled to form an annular structure section.
4. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: the high-performance concrete pipe piece is assembled and is set up the distributing type between the circumferential weld the tenon form is connected, tenon form is connected for the circular structure of concave convex formula, and height 30mm, every high-performance concrete pipe piece sets up 1 ~ 3 on the piece the tenon form is connected.
5. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: the high-performance concrete pipe pieces are longitudinally and annularly connected by the high-performance corrosion-resistant bolt.
6. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: the high-performance corrosion-resistant bolt is an arc-shaped bent bolt, the grade is A4L-80P, and the minimum tensile strength is 800 MPa; the mechanical performance of the nut is 8.0 grade; the lowest Hv of the gasket mechanical performance grade is 200; the materials of the bolt, the nut and the washer are all 316L stainless steel.
7. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: multiple waterproof system set up in high performance concrete pipe joint seam department, including neoprene water bar, porous type elastic rubber sealing pad, water-swelling sealing pad, butyronitrile cork rubber liner board, foam stick and polyurethane are sealed glues, the section of jurisdiction seam outside sets up neoprene water bar, the section of jurisdiction outside ditch inslot sets up porous type elastic rubber sealing pad, the interior side ditch inslot sets up water-swelling sealing pad is in section of jurisdiction circumferential weld department paste on the very heavy top surface in tenon form junction back butyronitrile cork rubber liner board carries out local caulking in tunnel top and bottom within range, and the caulking material adopts the foam stick with polyurethane is sealed glues.
8. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: the reinforced grouting system is characterized in that 1-3 grouting holes are reserved in the high-performance concrete pipe, and after synchronous grouting is carried out in the shield tunneling process, secondary supplementary grouting is carried out on the back of the high-performance concrete pipe along the reserved grouting holes.
9. The marine corrosive environment high performance durable shield segment lining structure of claim 1, which is characterized in that: the reserved reinforcing space is a 250mm thick reinforcing space reserved between the inner side of the high-performance concrete segment and a building limit, and can be reinforced by adopting concrete or a steel structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010179358.0A CN111188632A (en) | 2020-03-16 | 2020-03-16 | Sea area corrosive environment high performance durability shield constructs section of jurisdiction lining structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010179358.0A CN111188632A (en) | 2020-03-16 | 2020-03-16 | Sea area corrosive environment high performance durability shield constructs section of jurisdiction lining structure |
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| CN111188632A true CN111188632A (en) | 2020-05-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535830A (en) * | 2020-07-09 | 2020-08-14 | 湖南大学 | Ultrahigh-performance concrete reinforcing structure for shield tunnel segment and design method thereof |
| CN113107528A (en) * | 2021-05-31 | 2021-07-13 | 福州大学 | Assembled UHPC tunnel lining structure and construction method thereof |
| CN113187515A (en) * | 2021-05-28 | 2021-07-30 | 福州大学 | Tunnel secondary lining with assembled UHPC structure as bottom die and construction method thereof |
| CN113914907A (en) * | 2021-08-27 | 2022-01-11 | 中铁第四勘察设计院集团有限公司 | Method and device for preventing concrete at corner part outside shield tunnel segment from water |
| CN114961783A (en) * | 2022-05-26 | 2022-08-30 | 中铁四局集团第四工程有限公司 | Fiber concrete duct piece suitable for passing through heavy-duty traffic line and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535830A (en) * | 2020-07-09 | 2020-08-14 | 湖南大学 | Ultrahigh-performance concrete reinforcing structure for shield tunnel segment and design method thereof |
| CN113187515A (en) * | 2021-05-28 | 2021-07-30 | 福州大学 | Tunnel secondary lining with assembled UHPC structure as bottom die and construction method thereof |
| CN113107528A (en) * | 2021-05-31 | 2021-07-13 | 福州大学 | Assembled UHPC tunnel lining structure and construction method thereof |
| CN113914907A (en) * | 2021-08-27 | 2022-01-11 | 中铁第四勘察设计院集团有限公司 | Method and device for preventing concrete at corner part outside shield tunnel segment from water |
| CN113914907B (en) * | 2021-08-27 | 2023-06-30 | 中铁第四勘察设计院集团有限公司 | Method and device for waterproofing concrete at outer corners of shield tunnel segments |
| CN114961783A (en) * | 2022-05-26 | 2022-08-30 | 中铁四局集团第四工程有限公司 | Fiber concrete duct piece suitable for passing through heavy-duty traffic line and manufacturing method |
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