CN115368059A - Tunnel synchronous grouting shock insulation material and application thereof - Google Patents
Tunnel synchronous grouting shock insulation material and application thereof Download PDFInfo
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- CN115368059A CN115368059A CN202211141195.2A CN202211141195A CN115368059A CN 115368059 A CN115368059 A CN 115368059A CN 202211141195 A CN202211141195 A CN 202211141195A CN 115368059 A CN115368059 A CN 115368059A
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- polyurethane
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- insulation material
- shock insulation
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- 230000035939 shock Effects 0.000 title claims abstract description 43
- 239000012774 insulation material Substances 0.000 title claims abstract description 35
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 33
- 239000004814 polyurethane Substances 0.000 claims abstract description 40
- 229920002635 polyurethane Polymers 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000006229 carbon black Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000012615 aggregate Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 40
- 239000002002 slurry Substances 0.000 claims description 11
- 239000011435 rock Substances 0.000 claims description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229920005862 polyol Polymers 0.000 claims description 3
- 150000003077 polyols Chemical class 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 2
- 150000002513 isocyanates Chemical class 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000011527 polyurethane coating Substances 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000004044 response Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011381 foam concrete Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/16—Polyurethanes
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2046—Shock-absorbing materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel synchronous grouting shock insulation material and application thereof, wherein the tunnel synchronous grouting shock insulation material comprises the following components: polyurethane, coarse aggregate, quartz sand and carbon black; wherein, according to the weight part, include: the mixing amount of the polyurethane is 30-40 parts; the mixing amount of the quartz sand is 40-50 parts; the mixing amount of the coarse aggregate is 10-30 parts; the mixing amount of the carbon black is 3-15 parts. The tunnel synchronous grouting shock insulation material prepared by the invention has excellent performance after being condensed, and the parameters are that the 3d strength is 6.5Mpa, the 28d strength is 10Mpa, and the elastic modulus is 10-100Mpa. The shock insulation layer formed by the invention has good effect on the dynamic response of the tunnel structure under the action of earthquake.
Description
Technical Field
The invention relates to the field of tunnel engineering, in particular to a tunnel synchronous grouting shock insulation material and application thereof.
Background
With the rapid development of infrastructure construction in China, underground structures are more and more widely applied, such as urban underground tunnels, cross-sea tunnels and cross-river tunnels. Different from the ground structure, the tunnel can deform along with the movement of the surrounding soil body under the action of earthquake, and although the earthquake-resistant performance of the tunnel is superior to that of the ground structure, the underground engineering such as the tunnel and the like are seriously damaged in multiple earth earthquakes.
When the tunnel is seriously damaged by a high-strength earthquake, the repair difficulty is high, and the use after the earthquake is seriously influenced. In recent years, along with the rapid economic development of rivers and coastal cities, the construction of cross-sea shield tunnels is gradually increased. However, underwater geological conditions are complex, such as uneven soil layers (including soft soil and mucky soil), faults and broken zones, so that seismic and seismic isolation research on the tunnels at the seabed is necessary.
At present, the anti-seismic and shock-absorbing measures of tunnel engineering mainly comprise three types: one is that the deformation resistance of the surrounding stratum is improved by means of stratum reinforcement such as grouting; the second type is that the whole rigidity is reduced by adjusting the structure design, and the structure deformability is enhanced; and the third type is that a shock insulation layer is arranged between the tunnel and the soil layer of the peripheral field to reduce the internal force of the tunnel structure. The former two ways are both 'hard resistance' ways, namely, the rigidity of the structure is improved by increasing the section size, the reinforcement area and the like of the structure, so that the seismic performance of the structure is improved. However, the cross-sectional size and the reinforcing bar area of the structure are increased, the mass and the rigidity of the structure are also increased, the dynamic response under the earthquake action is increased, a large amount of economy is wasted, and a tunnel with an unobvious earthquake-resistant effect is replaced.
In contrast, providing a seismic isolation layer for a tunnel structure is one of effective measures for improving the seismic performance of the tunnel structure. At present, research on tunnel shock insulation materials is also increasing. Relevant researches show that foam concrete is used as a tunnel grouting shock insulation material, but the foam concrete is a porous concrete material in nature and has the problems of high brittleness and easy cracking. Asphalt cement mortar is also used as a tunnel grouting shock insulation material, but the asphalt cement mortar is unstable at high temperature and is not suitable for deep-buried tunnels. For a plurality of reasons, the tunnel grouting shock insulation materials which are popularized and practical are not available at present.
Disclosure of Invention
Aiming at the problem of poor anti-shock effect of a common tunnel in the prior art, the invention aims to provide a synchronous grouting shock insulation material for a submarine tunnel and application thereof.
The purpose of the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a tunnel synchronous grouting shock insulation material, which comprises the following components: polyurethane, coarse aggregate, quartz sand and carbon black; wherein, calculated according to the weight portion, the method comprises the following steps: the mixing amount of the polyurethane is 30-40 parts; the mixing amount of the quartz sand is 40-50 parts; the mixing amount of the coarse aggregate is 10-30 parts; the mixing amount of the carbon black is 3-15 parts.
Preferably, the polyurethane is a two-component polyurethane comprising a polyurethane black material and a polyurethane white material; wherein the polyurethane black material is isocyanate, the polyurethane white material is polyether polyol, and the mass ratio of the polyurethane black material to the polyurethane white material is 1:1.
preferably, the preparation method of the tunnel synchronous grouting shock insulation material comprises the following steps:
s1, weighing polyurethane black materials, polyurethane white materials, quartz sand, coarse aggregate and carbon black according to the amount for later use;
s2, mixing the quartz sand, the coarse aggregate and the carbon black according to the proportion, stirring for 1 minute, then slowly pouring the polyurethane black material and the polyurethane white material, and stirring for 2 minutes to obtain the tunnel synchronous grouting shock insulation material.
In a second aspect, the invention provides application of a tunnel synchronous grouting shock insulation material, wherein the submarine tunnel synchronous grouting shock insulation material is applied to a tunnel shock insulation layer.
Preferably, all the components of the raw materials are fully mixed to obtain tunnel synchronous grouting shock insulation material slurry, and the slurry is injected to the outside of a tunnel lining-inside of surrounding rocks in a shield tunneling machine synchronous grouting mode to form a shock insulation layer.
The invention has the beneficial effects that:
1. the tunnel synchronous grouting shock insulation material prepared by the invention has excellent mechanical properties after being condensed, and the parameters are that the 3d strength is 6.5MPa, the 28d strength is 10MPa, and the elastic modulus is 10-100MPa.
2. The tunnel synchronous grouting shock insulation material prepared by the invention has excellent slurry performance, the fluidity is 200-240mm, the consistency is 100-130mm, the initial setting time is 3h, and the final setting time is 24h.
3. The shock insulation layer formed by the invention has good effect on dynamic response of the tunnel structure under the action of earthquake.
4. The grouting shock insulation material has certain early strength and final strength, and low elastic modulus, and can meet the requirements of a shock insulation target of a tunnel on the material.
5. The grouting shock insulation material has proper solidification time, good fluidity, good consistency and strong impermeability and water resistance, and can meet the construction requirement of synchronous grouting of the submarine tunnel.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, without inventive effort, further drawings may be derived from the following figures.
FIG. 1 is a longitudinal cross-sectional view of the invention in a tunnel engineering application;
FIG. 2 is a cross-sectional view of the present invention in a tunnel engineering application;
FIG. 3 is a graph comparing the tunnel cross-sectional stress of the grouting material prepared in example 1 of the present invention with that of a general mortar material;
FIG. 4 is a graph comparing the cross-sectional strain of the tunnel of the grouting material prepared in example 1 of the present invention with that of a general mortar material.
Detailed Description
For the purpose of more clearly illustrating the present invention and more clearly understanding the technical features, objects and advantages of the present invention, the technical solutions of the present invention will now be described in detail below, but are not to be construed as limiting the implementable scope of the present invention.
The invention is further described with reference to the following examples.
Example 1
A tunnel synchronous grouting shock insulation material comprises the following components: polyurethane, coarse aggregate, quartz sand and carbon black, wherein the polyurethane comprises the following components in parts by weight: the mixing amount of the polyurethane is 40 parts; the mixing amount of the quartz sand is 30 parts; the mixing amount of the coarse aggregate is 27 parts; the mixing amount of the carbon black is 3 parts.
The slurry obtained by the proportioning has good initial flowing fluidity and the consistency of 112mm, and can meet the grouting requirement. The elastic modulus is between 10 and 100MPa, the texture is soft, the elasticity is good, and the energy dissipation and shock absorption effects can be achieved. The strength of the material exceeds 10MPa, so that the material not only can meet the requirement of bearing capacity, but also can bear the action of impact load.
Comparing the slurry prepared in the embodiment 1 of the invention with the common slurry, the components of the common slurry comprise the following components: cement, water, bentonite, fine aggregate and a water reducing agent. Wherein, calculated according to the weight portion, the method comprises the following steps: the mixing amount of the cement is 20 parts; the mixing amount of water is 15 parts; the mixing amount of the bentonite is 20 parts; the mixing amount of the fine aggregate is 43.8 parts; the parameter of the admixture is 1.2 parts. The results of the seismic isolation reduction are shown in FIG. 3.
Example 2
An application of a tunnel synchronous grouting shock insulation material comprises weighing polyurethane black material, polyurethane white material, quartz sand, coarse aggregate and carbon black according to a mixing ratio; according to different mixing proportions, stirring quartz sand, coarse aggregate and carbon black at a low speed for 1 minute, then slowly pouring polyurethane black material and white material, and stirring at a low speed for 2 minutes to obtain the tunnel synchronous grouting shock insulation material.
As shown in the structural diagrams of fig. 1 and fig. 2, each layer of the structure in fig. 1 is sequentially provided with seawater, ring rock, a grouting shock insulation layer and a reinforced concrete lining from top to bottom; the structures of each layer in the figure 2 are a rock ring, a grouting shock insulation layer and a lining in sequence from outside to inside.
The raw materials are fully mixed to obtain tunnel synchronous grouting shock insulation material slurry, and the slurry can be injected to the outside of a tunnel lining-inside of surrounding rocks in a synchronous grouting mode to form a shock insulation layer.
Example 3
The general finite element software ABAQUS is adopted to analyze the seismic isolation and reduction effects of the tunnel seismic isolation layer formed after the grouting material is constructed and the common mortar, and the result is shown in figure 4. It can be seen that the shock insulation grouting material provided by the invention can obviously reduce the stress and strain of the tunnel lining, and provides an important means for ensuring the safety of the tunnel structure under the action of an earthquake, the durability of the tunnel structure and the long-term stability.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The tunnel synchronous grouting shock insulation material is characterized by comprising the following components: polyurethane, coarse aggregate, quartz sand and carbon black; wherein, according to the weight part, include: the mixing amount of the polyurethane is 30-40 parts; the mixing amount of the quartz sand is 40-50 parts; the mixing amount of the coarse aggregate is 10-30 parts; the mixing amount of the carbon black is 3-15 parts.
2. The tunnel synchronous grouting shock insulation material as claimed in claim 1, wherein the polyurethane is a two-component polyurethane comprising a polyurethane black material and a polyurethane white material; the polyurethane coating comprises a polyurethane black material, a polyurethane white material, a polyether polyol, a polyurethane black material and a polyurethane white material, wherein the polyurethane black material is isocyanate, the polyurethane white material is polyether polyol, and the mass ratio of the polyurethane black material to the polyurethane white material is 1:1.
3. the synchronous grouting shock-insulation material for the tunnel according to claim 1, wherein the preparation method of the synchronous grouting shock-insulation material for the shield tunnel at the seabed comprises the following steps:
s1, weighing polyurethane black material, polyurethane white material, quartz sand, coarse aggregate and carbon black according to the amount for later use;
and S2, mixing quartz sand, coarse aggregate and carbon black according to the proportion, and slowly pouring polyurethane black material and white material to obtain the synchronous grouting shock insulation material for the submarine tunnel.
4. The synchronous grouting shock insulation material for the tunnel according to claim 1, wherein quartz sand, coarse aggregate and carbon black are mixed and stirred for 1 minute, and polyurethane black material and white material are added and stirred for 2 minutes.
5. The application of the tunnel synchronous grouting shock insulation material is characterized in that the tunnel synchronous grouting shock insulation material as claimed in any one of claims 1 to 4 is applied to a tunnel shock insulation layer.
6. The application of the synchronous grouting shock-insulation material for the tunnel according to claim 5 is characterized in that the raw materials are fully mixed to obtain slurry of the synchronous grouting shock-insulation material for the tunnel, and the slurry is injected into the outside of the tunnel lining and the surrounding rock by a shield machine in a synchronous grouting mode to form a shock-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211141195.2A CN115368059A (en) | 2022-09-20 | 2022-09-20 | Tunnel synchronous grouting shock insulation material and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211141195.2A CN115368059A (en) | 2022-09-20 | 2022-09-20 | Tunnel synchronous grouting shock insulation material and application thereof |
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