CN1888394A - Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet - Google Patents
Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet Download PDFInfo
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- CN1888394A CN1888394A CN 200610019657 CN200610019657A CN1888394A CN 1888394 A CN1888394 A CN 1888394A CN 200610019657 CN200610019657 CN 200610019657 CN 200610019657 A CN200610019657 A CN 200610019657A CN 1888394 A CN1888394 A CN 1888394A
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Abstract
The present invention relates to a functional gradient material interface reinforcing process for shield tunnel concrete segment. The contact face of the reinforced concrete structure layer and high-impervious protecting layer of shield tunnel concrete segment is the functional gradient material interface, and is characterized by that said interface reinforcing process includes the following several steps: 1), in reinforced concrete segment steel mould pouring high-performance concrete whose strength grade is greater than C50 so as to form reinforced concrete structure layer; 2), making functional gradient material interface reinforcing treatment: on the upper surface of the reinforced concrete structure layer stamping embedded polygonal interface, the included angle of polygonal line of embedded polygonal interface and horizontal plane is 15-65deg; 3), on the embedded polygonal interface adopting pumping process to pour high-performance fine aggregate concrete to upper surface of reinforced concrete segment steel mould so as to form high-impervious protecting layer.
Description
Technical field
The present invention relates to a kind of functional gradient material interface reinforcement process of shield tunnel concrete pipe sheet.
Background technology
Since the sixties in last century, the pin-connected panel reinforced concrete segment is promoted and used to shield tunnel lining structure gradually.Reinforced concrete segment has certain intensity, and the processing and fabricating ratio is easier to, can guarantee when adopting punching block to make (monolithic production) the section of jurisdiction precision (can both reach both at home and abroad ± 0.5mm), corrosion-resistant, cost is also low, and is at present domestic commonly used.But on using, engineering also exists many shortcomings, as: shrinkage strain is big, and is easy to crack, and waterproof and durability are bad, do not consider fire resistance etc.Thereby, improve its engineering service life to the optimal design of concrete pipe sheet material, just seem particularly important.
Functionally Graded Materials (Functionally Graded Material, abbreviation FGM) is meant two or more materials with different properties component, adopt advanced complex technique, making its component and structure reach continuous gradient changes, compound interface disappears between internal composition and make, relax the thermal stress of material internal, obtain the novel heterogeneous body composite material that performance is continuous smooth change.The underground construction tunnel duct piece often will be subjected to the reciprocation of multiple destructive factor, compare with the civilian construction structure with the industry under the atmospheric environment, the factor that influences the construction of tunnel durability is more complicated, both might be from the inner air environment, again might be from the aggressivity of outside soil environment, owing to contain a lot of corrosive mediums in the underground water, aggressivity salt is in the absorption and the deposition of concrete surface, make its local concentration reach very high, make concrete part form serious the erosion and cause concrete destruction.Therefore, the tunnel concrete pipe sheet material property is had higher requirement, and introducing Functionally Graded Materials design principle, application function functionally gradient material (FGM) in the tunnel duct piece concrete, make it to reach outer floor height waterproof, high impervious, high against corrosion, deck provides multi-functionals such as intensity, will improve the durability of concrete pipe sheet effectively, prolongs integrally-built service life.
Yet the introducing of Functionally Graded Materials is because the sudden change that the difference of materials with different properties component on characteristics such as physics, chemistry will inevitably be brought composite material interface layer performance, i.e. the unity problem of boundary layer between the heterogeneity material component.Thereby how to guarantee that functional gradient material interface has higher resistance to overturning, realize the change of gradient at functional material interface, setting up polynary collaborative compound interface and just seem most important, also is that present Functionally Graded Materials is applied to the key problem that needs to be resolved hurrily in the concrete material process.How to guarantee the stability of functional gradient material interface layer, one of them important techniques index is exactly the adhesion strength of boundary layer.
Functionally Graded Materials is introduced the design of subterranean tunnel concrete pipe sheet, the present domestic report that yet there are no, all there are suitable blank in the technology of aspects such as the reinforcement of its functional material interfacial transition zone and construction technology, patent etc., thereby by system research, it is most important and imperative setting up functionally gradient tunnel duct piece material design theory and the relevant interface enhancing technology that China has independent intellectual property right.
21 century is the underground space development epoch.In following many decades, tunnel over strait, river is got over by China and urban track traffic will be carried out Large scale construction, wherein has a lot of construction of tunnel will adopt shield method.In shield tunnel, the section of jurisdiction is most important and structural element most critical, and the quality of section of jurisdiction performance has decisive influence to construction of tunnel quality and service life.Therefore, introduce the Functionally Graded Materials design principle, the service life that the preparation height is impervious, long-life functionally gradient concrete pipe sheet can effectively improve shield tunnel, and in this key technology, functional gradient material interface is effectively strengthened, made it to have the important component part that higher interface binding intensity will become this technological development and apply.
Summary of the invention
The object of the present invention is to provide a kind of functional gradient material interface to have the functional gradient material interface reinforcement process of the shield tunnel concrete pipe sheet of higher resistance to overturning, this technology can improve the endurance quality of shield tunnel concrete pipe sheet, and then prolongs the service life of shield tunnel project.
To achieve these goals; the technical solution adopted in the present invention is: the functional gradient material interface reinforcement process of shield tunnel concrete pipe sheet; the reinforced concrete structure layer 1 and high impervious topping 2 phase-contact surfaces of shield tunnel concrete pipe sheet are functional gradient material interface, and it is characterized in that: it comprises the steps:
1) in the reinforced concrete segment punching block, pours into a mould the high performance concrete formation reinforced concrete structure layer 1 of strength grade greater than C50;
2) carry out the functional gradient material interface intensive treatment: the upper surface at reinforced concrete structure layer 1 impresses out embedded broken line shape interface 3, and the broken line and the horizontal plane angle θ at embedded broken line shape interface 3 are 15～65 °;
3) on embedded broken line shape interface 3, adopt pumping technology cast high-performance fine aggregate concrete to reinforced concrete segment punching block upper surface, form high impervious topping 2.
The thickness h 1 at described embedded broken line shape interface 3 is 0.5～2.0 with the ratio of the thickness h 0 of the impervious topping 2 of height.
It is to be grown to impressing the meshed grooves of formation rule with the upper surface of short at reinforced concrete structure layer 1 on the edge respectively by the first stainless steel die and the second stainless steel die that described upper surface at reinforced concrete structure layer 1 impresses out embedded broken line shape interface 3; 15～65 ° of the broken line of the first stainless steel die, the second stainless steel die and horizontal plane angles.
The thickness of the first stainless steel die, the second stainless steel die is 8～12mm.
The present invention has been owing to introduced embedded broken line shape interface form, can be preferably the high impervious topping 2 of section of jurisdiction organically be linked to be an integral body with reinforced concrete structure layer 1, shows following advantage:
(1) guaranteed that fully high impervious topping 2 has higher bonding strength with reinforced concrete structure layer 1, improves 30～50% than its adhesion strength of common stratiform smooth interface.
(2) adopt this interface enhancing form, can guarantee effectively the difference in functionality material shrink, creep, concertedness under the non-load action effect such as temperature action.
(3) because the prefabricated stainless steel die (the first stainless steel die, the second stainless steel die) of employing carries out interface enhancing, easy, easy row, thereby can't bring more complicated working procedure, do not influence construction speed substantially.
In sum, the present invention can have higher resistance to overturning, adhesion strength and distortion concertedness in assurance function functionally gradient material (FGM) interface.For high impervious, the long-life of realizing the functionally gradient section of jurisdiction requires to provide the important techniques support, do not appear in the newspapers as yet in the underground construction section of jurisdiction design at home and abroad.
Description of drawings
Fig. 1 is the structural representation of shield tunnel concrete pipe sheet of the present invention.
Fig. 2 is the A portion enlarged drawing of Fig. 1.
Fig. 3 is embedded broken line shape interface 3 enlarged diagrams.
Fig. 4-a is used for the first stainless steel printing mould structure schematic diagram that interface enhancing is handled.
Fig. 4-b is used for the second stainless steel printing mould structure schematic diagram that interface enhancing is handled.
Fig. 5 is that interface enhancing is handled and section of jurisdiction preparation technology's flow chart.
Fig. 6 is the interface binding intensity resolution chart.
The specific embodiment
The invention will be further described below in conjunction with example and accompanying drawing.
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 5; the functional gradient material interface reinforcement process of shield tunnel concrete pipe sheet; the reinforced concrete structure layer 1 and high impervious topping 2 phase-contact surfaces of shield tunnel concrete pipe sheet are functional gradient material interface, and it comprises the steps:
1) in the reinforced concrete segment punching block cast strength grade greater than the high performance concrete of C50 to apart from punching block surface 15～80mm, insert then and smash, forming thickness is the reinforced concrete structure layer 1 of 420.0～485.0mm;
2) carry out the functional gradient material interface intensive treatment: the upper surface at reinforced concrete structure layer 1 impresses out embedded broken line shape interface 3, and the broken line at embedded broken line shape interface 3 and horizontal plane keep 15～65 ° angle theta;
3) on the embedded broken line shape interface 3 on the reinforced concrete structure layer 1, adopt pumping technology to pour into a mould high water proof anti-seepage layer concrete to reinforced concrete segment punching block upper surface, insert then and smash, receive light, wipe one's face, forming thickness is the high impervious topping 2 of 10.0～40.0mm; Steam-cured section of jurisdiction, and water curing is carried out in the section of jurisdiction by maintaining process.
After the water curing of above-mentioned section of jurisdiction finishes, spray efficient permeable crystalline waterproofing material at the impervious topping external surface of height, forming thickness is the high fine and close waterproofing course of 0.01～1.5mm; Spray maintenance in section of jurisdiction is transported to the shield tunnel construction scene after stipulate the length of time, with shield machine the section of jurisdiction is installed; After the section of jurisdiction was installed to shield tunnel, at reinforced concrete structure layer 1 inner surface spraying fire-proof coating for tunnels, forming thickness was the fire prevention bursting layer of 10.0～16.0mm, gets the shield tunnel concrete pipe sheet.
The thickness h 1 at described embedded broken line shape interface 3 is 0.5～2.0 with the ratio of the thickness h 0 of the impervious topping 2 of height.
It is to be grown to impressing the meshed grooves of formation rule with the upper surface of short at reinforced concrete structure layer 1 on the edge respectively by the first stainless steel die and the second stainless steel die that described upper surface at reinforced concrete structure layer 1 impresses out embedded broken line shape interface 3; 15～65 ° of the broken line of the first stainless steel die, the second stainless steel die and horizontal plane angles.
Shown in Fig. 4-a, Fig. 4-b, the thickness of the first stainless steel die, the second stainless steel die is 8～12mm.
The impervious topping of described height 2 by diffusion coefficient less than 3.0 * 10
-13m
2/ s, cracking resistance grade reach I level, the strength grade high-performance fine aggregate concrete between C100～C200 and are prepared from.The high-performance fine aggregate concrete is mainly mixed by cement, water, hardening agent and the particle diameter fine aggregate raw material less than 0.63mm, and the shared parts by weight of each raw material are: 1.00 parts of cement, 0.16～0.22 part in water, 0.40～0.75 part of hardening agent, particle diameter are less than 1.00～1.40 parts of the fine aggregates of 0.63mm.Described hardening agent mainly by specific area greater than 200000cm
2The high activity SiO of/g
2Micro mist, specific area are greater than 4000cm
2Little breeze of the high activity of/g or flyash, assorted fibre and economization agent raw material mix, and the shared parts by weight of each raw material are: specific area is greater than 200000cm
2The high activity SiO of/g
21.00 parts of micro mists, specific area are greater than 4000cm
21.50～3.00 parts in little breeze of the high activity of/g or flyash, 0.01～0.02 part of assorted fibre, 0.08～0.15 part of economization agent.
Described strength grade will be mixed by raw materials such as cement, flyash, sand, stone, high efficiency water reducing agent, water greater than the high performance concrete of C50, and the shared parts by weight of each raw material are: 1.00 parts of cement, 0.20～0.30 part in flyash (I level), 1.60～1.90 parts in sand, 1.00～1.30 parts of the handstones of particle diameter 4.75～9.5mm, the big stone 1.60～2.00 of particle diameter 4.75～26.5mm, 0.01～0.02 part of high efficiency water reducing agent, 0.30～0.40 part in water.
High impervious topping 2 adopts embedded broken line shape interface with reinforced concrete structure layer 1; overcome traditional level and smooth stratiform interface processing mode; enlarged markedly the contact area of interfacial transition zone; to eliminate the discontinuity between difference in functionality functionally gradient material (FGM) performance as far as possible; guarantee that it has excellent polynary concertedness; and has a higher bonding strength; make it the relative slippage of unlikely generation under outer load and self the non-load action effect (as temperature deformation and contraction), cracking etc., guarantee integrally-built continuity, stability.Guaranteed that functional gradient material interface has higher bonding strength, 28 days interface adhesion strength 〉=4.2MPa compare the stratiform smooth interface without intensive treatment, and adhesion strength improves 30～50%.
The adhesion strength at the embedded broken line shape of chamber experimental test interface by experiment, test method adopts shown in Figure 6 carrying out, and it has promptly represented the adhesion strength at interface at splitting tensile strength at the interface.The functional gradient material interface adhesion strength that the present invention set up requires to be not less than 4.2MPa.
The test of functional gradient shield pipe sheet interface performance:
(1) concrete performance test of reinforced concrete structure layer 1 and high impervious topping 2: the concrete of reinforced concrete structure layer 1 is prepared from by the high performance concrete of strength grade 〉=C50, actual measurement 28d compressive strength 65.5MPa; The concrete of high impervious topping 2 is prepared from by high-strength, high impervious, anticorrosive concrete.Actual measurement 11h compressive strength 56.0MPa, 28d compressive strength 158MPa, chloride diffusion coefficient 0.70 * 10
-13m
2/ s.
(2) bonding strength test: adopt measurement of test method shown in Figure 6 to strengthen the back and without the adhesion strength of the boundary layer of intensive treatment, interface binding intensity is as shown in table 1.Data show that behind interface enhancing, the 28d adhesion strength is compared without the boundary layer of strengthening and improved 40.8%.
(2) deformation performance research: respectively the two layers of gradient material is carried out the shrinkage strain performance test, test result is as shown in table 2, the result shows, the shrinkage strain matching performance of deck and water proof anti-seepage layer concrete is good, and breakoff phenomenons such as the cracking at interface and slippage can not take place in interface enhancing of the present invention design.
The subordinate list explanation
Table 1: section of jurisdiction interface binding intensity test.
Table 2: the shrinkage strain of section of jurisdiction difference in functionality functionally gradient material (FGM).
Table 1 section of jurisdiction interface binding intensity
| Project | Adhesion strength/MPa | ||
| 11h | 7d | 28d | |
| Boundary layer after the reinforcement | 2.71 | 3.34 | 5.28 |
| Without the boundary layer of strengthening | 1.56 | 2.51 | 3.75 |
The shrinkage strain of table 2 section of jurisdiction difference in functionality functionally gradient material (FGM)
| Material | The dry contraction/* 10 -6 | ||||
| 1d | 3d | 7d | 28d | 60d | |
| Deck | 45 | 90 | 120 | 180 | 210 |
| High impervious topping | 50 | 105 | 155 | 206 | 255 |
Claims (4)
1. the functional gradient material interface reinforcement process of shield tunnel concrete pipe sheet; the reinforced concrete structure layer (1) of shield tunnel concrete pipe sheet is a functional gradient material interface with high impervious topping (2) phase-contact surface, and it is characterized in that: it comprises the steps:
1) in the reinforced concrete segment punching block, pours into a mould the high performance concrete formation reinforced concrete structure layer (1) of strength grade greater than C50;
2) carry out the functional gradient material interface intensive treatment: the upper surface at reinforced concrete structure layer (1) impresses out embedded broken line shape interface (3), and the broken line at embedded broken line shape interface (3) and horizontal plane angle (θ) are 15～65 °;
3) go up employing pumping technology cast high-performance fine aggregate concrete at embedded broken line shape interface (3) to reinforced concrete segment punching block upper surface, form high impervious topping (2).
2. the functional gradient material interface reinforcement process of shield tunnel concrete pipe sheet according to claim 1 is characterized in that: the thickness (h1) at described embedded broken line shape interface (3) is 0.5～2.0 with the ratio of the thickness (h0) of high impervious topping (2).
3. the functional gradient material interface reinforcement process of shield tunnel concrete pipe sheet according to claim 1, it is characterized in that: it is to be grown to impressing the meshed grooves of formation rule with the upper surface of short at reinforced concrete structure layer (1) on the edge respectively by the first stainless steel die and the second stainless steel die that described upper surface at reinforced concrete structure layer (1) impresses out embedded broken line shape interface (3); 15～65 ° of the broken line of the first stainless steel die, the second stainless steel die and horizontal plane angles.
4. the functional gradient material interface reinforcement process of shield tunnel concrete pipe sheet according to claim 3 is characterized in that: the thickness of the first stainless steel die, the second stainless steel die is 8～12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100196578A CN100516463C (en) | 2006-07-18 | 2006-07-18 | Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100196578A CN100516463C (en) | 2006-07-18 | 2006-07-18 | Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1888394A true CN1888394A (en) | 2007-01-03 |
| CN100516463C CN100516463C (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100196578A Expired - Fee Related CN100516463C (en) | 2006-07-18 | 2006-07-18 | Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet |
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|---|---|
| CN (1) | CN100516463C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693926A (en) * | 2013-12-24 | 2014-04-02 | 中铁二十三局集团轨道交通工程有限公司 | Corrosion resistant reinforced concrete pipe piece for subway |
| CN103912286A (en) * | 2014-03-14 | 2014-07-09 | 上海市政工程设计研究总院（集团）有限公司 | Method for protecting compound pipe piece connector plate from deformation |
| CN107012886A (en) * | 2017-04-07 | 2017-08-04 | 中交第二航务工程局有限公司 | Using the assembled pipe gallery that the burst of gradient concrete is prefabricated |
| CN112942579A (en) * | 2019-12-10 | 2021-06-11 | 南京林业大学 | Structure for reinforcing UHPC-NC interface bonding by adopting convex groove perforated steel plate and manufacturing method |
| CN113582595A (en) * | 2021-08-12 | 2021-11-02 | 合肥工业大学 | Functionally graded concrete composite garbage pool and manufacturing method thereof |
-
2006
- 2006-07-18 CN CNB2006100196578A patent/CN100516463C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693926A (en) * | 2013-12-24 | 2014-04-02 | 中铁二十三局集团轨道交通工程有限公司 | Corrosion resistant reinforced concrete pipe piece for subway |
| CN103693926B (en) * | 2013-12-24 | 2016-06-08 | 中铁二十三局集团轨道交通工程有限公司 | A kind of corrosion-resistant subway reinforced concrete segment |
| CN103912286A (en) * | 2014-03-14 | 2014-07-09 | 上海市政工程设计研究总院（集团）有限公司 | Method for protecting compound pipe piece connector plate from deformation |
| CN107012886A (en) * | 2017-04-07 | 2017-08-04 | 中交第二航务工程局有限公司 | Using the assembled pipe gallery that the burst of gradient concrete is prefabricated |
| CN107012886B (en) * | 2017-04-07 | 2019-01-22 | 中交第二航务工程局有限公司 | Using the assembled pipe gallery that the fragment of gradient concrete is prefabricated |
| CN112942579A (en) * | 2019-12-10 | 2021-06-11 | 南京林业大学 | Structure for reinforcing UHPC-NC interface bonding by adopting convex groove perforated steel plate and manufacturing method |
| CN113582595A (en) * | 2021-08-12 | 2021-11-02 | 合肥工业大学 | Functionally graded concrete composite garbage pool and manufacturing method thereof |
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| Publication number | Publication date |
|---|---|
| CN100516463C (en) | 2009-07-22 |
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Granted publication date: 20090722 Termination date: 20120718 |