CN112814703A - UHPC underground ultrahigh-strength novel duct piece - Google Patents
UHPC underground ultrahigh-strength novel duct piece Download PDFInfo
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- CN112814703A CN112814703A CN202110152646.1A CN202110152646A CN112814703A CN 112814703 A CN112814703 A CN 112814703A CN 202110152646 A CN202110152646 A CN 202110152646A CN 112814703 A CN112814703 A CN 112814703A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 35
- 238000003825 pressing Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 51
- 238000002156 mixing Methods 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 239000004693 Polybenzimidazole Substances 0.000 description 10
- 229920002480 polybenzimidazole Polymers 0.000 description 10
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 10
- 239000011398 Portland cement Substances 0.000 description 9
- 229920006389 polyphenyl polymer Polymers 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000006004 Quartz sand Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000003638 chemical reducing agent Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000000835 fiber Substances 0.000 description 8
- 239000010881 fly ash Substances 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 229910021487 silica fume Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003472 neutralizing effect Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- HSTOKWSFWGCZMH-UHFFFAOYSA-N 3,3'-diaminobenzidine Chemical group C1=C(N)C(N)=CC=C1C1=CC=C(N)C(N)=C1 HSTOKWSFWGCZMH-UHFFFAOYSA-N 0.000 description 2
- KBZFDRWPMZESDI-UHFFFAOYSA-N 5-aminobenzene-1,3-dicarboxylic acid Chemical compound NC1=CC(C(O)=O)=CC(C(O)=O)=C1 KBZFDRWPMZESDI-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000137 polyphosphoric acid Polymers 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000489492 Arisaema Species 0.000 description 1
- KSSJBGNOJJETTC-UHFFFAOYSA-N COC1=C(C=CC=C1)N(C1=CC=2C3(C4=CC(=CC=C4C=2C=C1)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC(=CC=C1C=1C=CC(=CC=13)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC=C(C=C1)OC Chemical compound COC1=C(C=CC=C1)N(C1=CC=2C3(C4=CC(=CC=C4C=2C=C1)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC(=CC=C1C=1C=CC(=CC=13)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC=C(C=C1)OC KSSJBGNOJJETTC-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil 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 provides a UHPC underground ultrahigh-strength novel duct piece which comprises two first duct pieces and a second duct piece, wherein one side of each first duct piece is provided with a slot, the two sides of each second duct piece are provided with a body-type connecting plugboard, the plugboards are connected between the two slots in a plugging fit manner, the two sides of each second duct piece are provided with fixing holes, one side of each first duct piece is provided with a guide hole, each guide hole is internally connected with a fixing rod in a sliding manner, a first spring is fixedly connected between each fixing rod and the hole bottom of the guide hole, and each first duct piece is internally provided with a locking device. The UHPC underground ultrahigh-strength novel duct piece provided by the invention has the advantages of strong deformation resistance, low brittleness, good toughness, high compressive strength and the like; and, through locking device with second section of jurisdiction and two first section of jurisdiction combination into a section of jurisdiction structure of accomplishing, when having improved the waterproof nature and the crushing resistance of section of jurisdiction to the tunnel top, from also having prolonged the holistic life of section of jurisdiction.
Description
Technical Field
The invention relates to the technical field of underground tunnel pipe pieces, in particular to a UHPC underground ultrahigh-strength novel pipe piece.
Background
The segment is a main assembly component for tunnel construction, is the innermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. The quality of the duct piece is directly related to the overall quality and safety of the tunnel, and the waterproof performance and the durability of the tunnel are affected. The pressure born by the duct piece at the top of the tunnel in the tunnel is the largest, and the connecting part of the duct piece at the top and the duct pieces at the side is easy to loosen under the long-time erosion of the underground environment, so that the duct piece at the top is obviously settled or displaced, and the overall quality and safety of the tunnel are damaged; and the phenomenon of infiltration still appears easily in the connection position of top section of jurisdiction and side section of jurisdiction for the life of section of jurisdiction is by significantly reduced.
Disclosure of Invention
In order to solve the technical problems existing in the background technology, the invention adopts the technical scheme that:
the novel UHPC underground ultrahigh-strength duct piece comprises two first duct pieces and a second duct piece, wherein one side of each first duct piece is provided with a slot, two sides of each second duct piece are provided with a uniform connection plugboard, the plugboards are connected between the two slots in a splicing fit mode, two sides of each second duct piece are provided with fixing holes, one side of each first duct piece is provided with a guide hole, each guide hole corresponds to a fixing hole, each guide hole is internally provided with a fixing rod in a sliding connection mode, each fixing rod is fixedly connected with a first spring between the bottom of the guide hole, and each first duct piece is internally provided with a locking device used for fixing the fixing rod in the fixing hole.
Preferably, the locking device comprises a pressing rod, the pressing rod is arranged in the slot, a pressing hole is formed in the slot, the pressing rod is connected in the pressing hole in a sliding mode, a through hole is formed in the pressing rod, the through hole corresponds to the fixing rod, and a second spring is fixedly connected between the pressing rod and the bottom of the pressing hole.
Preferably, the upper end of each compression bar is fixedly connected with a first rubber block.
Preferably, one end of each fixing rod is fixedly connected with a second rubber block.
Preferably, each slot side wall is fixedly connected with a water stop strip.
Preferably, the first and second duct pieces are both made of Ultra High Performance Concrete (UHPC). Preferably, the preparation raw materials of the ultra-high performance concrete comprise:
preferably, the preparation raw materials of the ultra-high performance concrete comprise:
more preferably, the raw materials for preparing the ultra-high performance concrete also comprise 1-5 parts of polyvinyl alcohol.
In one embodiment, the amino-containing polybenzimidazole is prepared in a similar manner as disclosed in chinese granted patent CN101220163B, except that the tetraamine is in slight excess to obtain a slightly lower molecular weight and more reactive amino groups. The method specifically comprises the following steps:
1.082g of 3, 3 ', 4, 4' -tetraaminobiphenyl and 0.905g of 5-amino isophthalic acid are added into 20g of polyphosphoric acid containing 70-90 wt% of phosphorus pentoxide, and the mixture is reacted at 150 ℃ for 2 hours, then at 190 ℃ for 20 hours under the condition of nitrogen protection and mechanical stirring, and then is poured into water after cooling. Neutralizing with sodium hydroxide to weak acidity, neutralizing with sodium bicarbonate to neutrality, filtering, adding the collected polymer into ammonia water (under nitrogen protection) at 80 deg.C, stirring for 12 hr, filtering, washing the sample to neutrality, and vacuum drying at 100 deg.C for 24 hr to obtain amino-containing polybenzimidazole.
In one embodiment, the method for preparing the ultra-high performance concrete comprises the following steps:
(1) adding portland cement, fly ash, an expanding agent, silica fume, quartz sand, steel fibers and aggregate into a mixer according to the parts by weight, and fully mixing to obtain a first mixture;
(2) adding a water reducing agent into water, and fully mixing to obtain a mixture II;
(3) adding amino-containing polybenzimidazole and optionally polyvinyl alcohol into dimethyl sulfoxide, and fully dissolving to obtain a mixture III;
(4) adding sulfonated polyphenyl and KH-560 into ethanol, and fully mixing to obtain a mixture IV;
(5) and fully mixing the first mixture, the second mixture, the third mixture and the fourth mixture to obtain the ultra-high performance concrete.
The invention has the advantages that:
(1) the invention provides novel ultra-high performance concrete, which introduces amino-containing polybenzimidazole, sulfonated polyphenyl and optionally polyvinyl alcohol through formula adjustment, improves the crosslinking degree, curing speed and strength of a system, forms an interpenetrating network structure, and can obtain a duct piece with higher curing speed and higher strength;
(2) the UHPC underground ultrahigh-strength novel duct piece provided by the invention has the advantages of strong deformation resistance, low brittleness, good toughness, high compressive strength and the like. And, through locking device with second section of jurisdiction and two first section of jurisdiction combination one complete section of jurisdiction structures, strengthened joint strength and waterproof performance between the section of jurisdiction, greatly reduced the support section of jurisdiction at top appear obvious settlement and the probability of displacement. When having improved the waterproof nature and the crushing resistance of section of jurisdiction to the tunnel top, from also having prolonged the holistic life of section of jurisdiction.
Drawings
The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a schematic diagram of the basic structure of the present invention;
FIG. 2 is an enlarged view of portion E of FIG. 1;
FIG. 3 is a state diagram when the locking device is unlocked;
fig. 4 is a top view of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and specific examples, which are not intended to limit the invention thereto.
Novel ultra-high-strength duct piece
Examples 1 to 1
As shown in fig. 1-4, the UHPC underground ultrahigh-strength novel duct piece provided by the invention comprises two first duct pieces 1 and two second duct pieces 2, wherein one side of each first duct piece 1 is provided with a slot 11, two sides of each second duct piece 2 are provided with a uniform connecting insertion plate 21, and the insertion plates 21 are connected between the two slots 11 in an insertion fit manner. The equal fixed connection sealing rod 5 of every slot 11 lateral wall, sealing rod 5 can improve the water-proof effects at the connection position of first section of jurisdiction 1 and second section of jurisdiction 2, appear the phenomenon of leaking in the gap of avoiding connecting the position, and influence the stability of whole section of jurisdiction structure. The both sides of second section of jurisdiction 2 all are equipped with fixed orifices 22, and 1 one side of every first section of jurisdiction all is equipped with guiding hole 3, and every guiding hole 3 all corresponds the setting with fixed orifices 22. When the inserting plate 21 of the second pipe piece 2 is inserted into the inserting groove 11 of the first pipe piece 1, the guide holes 3 are communicated with the fixing holes 22. Each guide hole 3 is connected with a fixed rod 31 in a sliding way, and the fixed rod 31 can extend into the communicated fixed holes 22 through the guide holes 3. Each fixing rod 31 is fixedly connected with the bottom of the guide hole 3 through a first spring 32, and in a free state, the first spring 32 can enable the corresponding fixing rod 31 to extend into the communicated fixing hole 22 through the guide hole 3. One end of each fixing rod 31 is fixedly connected with the second rubber block 311. After the fixing rod 31 extends into the fixing hole 22, the second rubber block 311 can play a role in buffering between the fixing rod 31 and the fixing hole 22, and prevent the fixing rod 31 and the fixing hole 22 from directly abutting to cause abrasion to the fixing rod and the fixing hole. Each first tube sheet 1 is provided with a locking device for fixing the fixing rod 31 in the fixing hole 22. The locking device comprises a pressing rod 4, the pressing rod 4 is arranged in the slot 11, a pressing hole 41 is formed in the slot 11, the pressing rod 4 is connected in the pressing hole 41 in a sliding mode, a through hole 42 is formed in the pressing rod 4, the through hole 42 corresponds to the fixing rod 31, and the fixing rod 31 can penetrate through the through hole 42 and extend into the fixing hole 22. And a second spring 43 is fixedly connected between the pressure lever 4 and the bottom of the pressing hole 41. When the second segment 2 is not spliced with the first segment 1, the second spring 43 enables the pressure rod 4 to extend out of the pressing hole 41; and the fixing rod 31 is tightly pressed against the outer wall of the pressure lever 4, so that the first spring 32 is in a compressed state. When the insert plate 21 of the second tube sheet 2 is inserted into the slot 11 of the first tube sheet 1, the press rod 4 presses the second spring 43 downward to move the press rod 4 downward along the direction of the press hole 41, and the fixing rod 31 passes through the through hole 42 and extends into the fixing hole 22 under the action of the first spring 32 in the process that the through hole 42 moves downward along with the press hole 41. Thereby, the fixing rod 31 is fixed in the fixing hole 22, and the effect of reinforcing and fixing the connection of the first pipe sheet 1 and the second pipe sheet 2 is achieved. The upper end of each compression bar 4 is fixedly connected with a first rubber block 44, when the inserting plate 21 of the second duct piece 2 is inserted into the slot 11 of the first duct piece 1, the lower side of the inserting plate 21 can press down the compression bar 4, and the first rubber block 44 can play a role in buffering between the compression bar 4 and the inserting plate 21, so that the compression bar 4 and the inserting plate 21 are prevented from directly abutting to cause abrasion to the compression bar 4 and the inserting plate 21.
During the use, peg graft in the slot 11 of two first sections of jurisdiction 1 with second section of jurisdiction 2 through the picture peg 21 of both sides, can consolidate the position of being connected of first section of jurisdiction 1 with second section of jurisdiction 2 through locking device, improved the joint strength of first section of jurisdiction 1 with second section of jurisdiction 2. The second duct piece 2 is arranged right above the tunnel and used for bearing the soil layer pressure and the underground water pressure at the top of the tunnel.
In the invention, the novel ultra-high performance concrete is prepared from the following raw materials:
the portland cement is P.O 42.5.5 portland cement manufactured by Hangzhou Ming Wei building materials Co.
The fly ash is purchased from processing plant of Chuangwei mineral products in Lingshou county, has 325 meshes and has the density of 1.9-2 (kg/m)3)。
The expanding agent was purchased from new building materials ltd, kindred, shandong, model uea.
The silica fume was purchased from 200 mesh, China silicon mining Co., Ltd, Shanghai county.
The quartz sand is purchased from Ningbo Jia and New materials science and technology Limited company, and is 20-40 meshes.
The steel fiber is purchased from Arisaema Sichuan building materials Co., Ltd, and has a diameter of 0.15mm and a length of 15 mm.
The aggregate is bauxite aggregate of Zhengzhou Jingfeng wear-resistant material Co., Ltd, 325 meshes.
The water reducing agent is purchased from Federal fine chemical Co., Ltd in Guangdong, model B-3805.
The amino-containing polybenzimidazole is prepared by the following steps:
1.082g of 3, 3 ', 4, 4' -tetraaminobiphenyl and 0.905g of 5-amino isophthalic acid are added into 20g of polyphosphoric acid containing 70-90 wt% of phosphorus pentoxide, and the mixture is reacted at 150 ℃ for 2 hours, then at 190 ℃ for 20 hours under the condition of nitrogen protection and mechanical stirring, and then is poured into water after cooling. Neutralizing with sodium hydroxide to weak acidity, neutralizing with sodium bicarbonate to neutrality, filtering, adding the collected polymer into ammonia water (under nitrogen protection) at 80 deg.C, stirring for 12 hr, filtering, washing the sample to neutrality, and vacuum drying at 100 deg.C for 24 hr to obtain amino-containing polybenzimidazole.
The sulfonated polyphenyl is prepared by the following method: polyphenyl (p-poly-phenylene (ppl) available from Ouche fluoroplastics, Inc., Winzhou) was added to 98% concentrated sulfuric acid in a charge of 1g:20ml, refluxed at 170 ℃ for 15 hours, poured into a mixture of acetone and water, sufficiently washed, and vacuum-dried at 100 ℃ for 24 hours to obtain the sulfonated polyphenyl.
Polyvinyl alcohol was purchased from clony, japan, model number PVA 117.
KH-560, water, dimethyl sulfoxide, ethanol were purchased from the Aladdin reagent.
The parts in the following examples are parts by weight.
Example 2-1
The preparation method of the first duct piece 1 or the second duct piece 2 comprises the following steps:
(1) adding 100 parts of portland cement, 50 parts of fly ash, 3 parts of an expanding agent, 10 parts of silica fume, 60 parts of quartz sand, 30 parts of steel fiber and 60 parts of aggregate into a mixer, and fully mixing for 100 seconds at 200r/min to obtain a first mixture;
(2) adding 3 parts of water reducing agent into 30 parts of water, and fully mixing to obtain a mixture II;
(3) adding 1 part of amino-containing polybenzimidazole into 5 parts of dimethyl sulfoxide, and fully dissolving to obtain a mixture III;
(4) adding 1 part of sulfonated polyphenyl and 1 part of KH-560 into 10 parts of ethanol, and fully mixing to obtain a mixture IV;
(5) fully mixing the first mixture, the second mixture, the third mixture and the fourth mixture at the temperature of 50 ℃ for 150 seconds at the speed of 200r/min to obtain the ultra-high performance concrete;
(6) and (3) filling the ultrahigh-performance concrete into a mold, forming and demolding to obtain the first duct piece 1 or the second duct piece 2.
Examples 2 to 2
The preparation method of the first duct piece 1 or the second duct piece 2 comprises the following steps:
(1) adding 100 parts of portland cement, 54 parts of fly ash, 7 parts of an expanding agent, 13 parts of silica fume, 77 parts of quartz sand, 35 parts of steel fiber and 78 parts of aggregate into a mixer, and fully mixing for 100 seconds at 200r/min to obtain a first mixture;
(2) adding 6 parts of water reducing agent into 65 parts of water, and fully mixing to obtain a mixture II;
(3) adding 3 parts of amino-containing polybenzimidazole into 8 parts of dimethyl sulfoxide, and fully dissolving to obtain a mixture III;
(4) adding 3 parts of sulfonated polyphenyl and 4 parts of KH-560 into 12 parts of ethanol, and fully mixing to obtain a mixture IV;
(5) fully mixing the first mixture, the second mixture, the third mixture and the fourth mixture at the temperature of 50 ℃ for 150 seconds at the speed of 200r/min to obtain the ultra-high performance concrete;
(6) and (3) filling the ultrahigh-performance concrete into a mold, forming and demolding to obtain the first duct piece 1 or the second duct piece 2.
Examples 2 to 3
The preparation method of the first duct piece 1 or the second duct piece 2 comprises the following steps:
(1) adding 100 parts of portland cement, 54 parts of fly ash, 7 parts of an expanding agent, 13 parts of silica fume, 77 parts of quartz sand, 35 parts of steel fiber and 78 parts of aggregate into a mixer, and fully mixing for 100 seconds at 200r/min to obtain a first mixture;
(2) adding 6 parts of water reducing agent into 65 parts of water, and fully mixing to obtain a mixture II;
(3) fully mixing the first mixture and the second mixture at the temperature of 50 ℃ for 150 seconds at the speed of 200r/min to obtain the ultrahigh-performance concrete;
(4) and (3) filling the ultrahigh-performance concrete into a mold, forming and demolding to obtain the first duct piece 1 or the second duct piece 2.
Examples 2 to 4
The preparation method of the first duct piece 1 or the second duct piece 2 comprises the following steps:
(1) adding 100 parts of portland cement, 54 parts of fly ash, 7 parts of an expanding agent, 13 parts of silica fume, 77 parts of quartz sand, 35 parts of steel fiber and 78 parts of aggregate into a mixer, and fully mixing for 100 seconds at 200r/min to obtain a first mixture;
(2) adding 6 parts of water reducing agent into 65 parts of water, and fully mixing to obtain a mixture II;
(3) adding 3 parts of sulfonated polyphenyl and 4 parts of KH-560 into 12 parts of ethanol, and fully mixing to obtain a mixture III;
(4) fully mixing the first mixture, the second mixture and the third mixture at the temperature of 50 ℃ for 150 seconds at the speed of 200r/min to obtain the ultra-high performance concrete;
(5) and (3) filling the ultrahigh-performance concrete into a mold, forming and demolding to obtain the first duct piece 1 or the second duct piece 2.
Examples 2 to 5
The preparation method of the first duct piece 1 or the second duct piece 2 comprises the following steps:
(1) adding 100 parts of portland cement, 54 parts of fly ash, 7 parts of an expanding agent, 13 parts of silica fume, 77 parts of quartz sand, 35 parts of steel fiber and 78 parts of aggregate into a mixer, and fully mixing for 100 seconds at 200r/min to obtain a first mixture;
(2) adding 6 parts of water reducing agent into 65 parts of water, and fully mixing to obtain a mixture II;
(3) adding 3 parts of amino-containing polybenzimidazole into 8 parts of dimethyl sulfoxide, and fully dissolving to obtain a mixture III;
(4) fully mixing the first mixture, the second mixture and the third mixture at the temperature of 50 ℃ for 150 seconds at the speed of 200r/min to obtain the ultra-high performance concrete;
(5) and (3) filling the ultrahigh-performance concrete into a mold, forming and demolding to obtain the first duct piece 1 or the second duct piece 2.
Examples 2 to 6
The preparation method of the first duct piece 1 or the second duct piece 2 comprises the following steps:
(1) adding 100 parts of portland cement, 54 parts of fly ash, 7 parts of an expanding agent, 13 parts of silica fume, 77 parts of quartz sand, 35 parts of steel fiber and 78 parts of aggregate into a mixer, and fully mixing for 100 seconds at 200r/min to obtain a first mixture;
(2) adding 6 parts of water reducing agent into 65 parts of water, and fully mixing to obtain a mixture II;
(3) adding 3 parts of amino-containing polybenzimidazole and 2 parts of polyvinyl alcohol into 8 parts of dimethyl sulfoxide, and fully dissolving to obtain a mixture III;
(4) adding 3 parts of sulfonated polyphenyl and 4 parts of KH-560 into 12 parts of ethanol, and fully mixing to obtain a mixture IV;
(5) fully mixing the first mixture, the second mixture, the third mixture and the fourth mixture at the temperature of 50 ℃ for 150 seconds at the speed of 200r/min to obtain the ultra-high performance concrete;
(6) and (3) filling the ultrahigh-performance concrete into a mold, forming and demolding to obtain the first duct piece 1 or the second duct piece 2.
And (3) performance testing:
the ultra-high performance concrete obtained in the above examples 2-1 to 2-6 was molded, formed and demolded to prepare a standard concrete test block, and then performance tests were performed, with the results as shown in the following table.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
- Novel section of jurisdiction of UHPC underground superhigh strength, its characterized in that: including two first section of jurisdiction (1) and second section of jurisdiction (2), every first section of jurisdiction (1) one side all is equipped with slot (11), second section of jurisdiction (2) both sides homogeneous formula connection picture peg (21), picture peg (21) grafting cooperation is connected between two slot (11), second section of jurisdiction (2) both sides all are equipped with fixed orifices (22), every first section of jurisdiction (1) one side all is equipped with guiding hole (3), every guiding hole (3) all corresponds the setting with fixed orifices (22), every equal sliding connection dead lever (31) in guiding hole (3), every equal fixed connection first spring (32) between dead lever (31) and guiding hole (3) hole bottom, every all be equipped with in first section of jurisdiction (1) and be used for fixing the locking device in fixed orifices (22) with dead lever (31).
- 2. The UHPC underground ultrahigh-strength novel duct sheet according to claim 1, characterized in that: locking device includes depression bar (4), depression bar (4) set up in slot (11), be equipped with on slot (11) and press down hole (41), depression bar (4) sliding connection is in pressing down hole (41), be equipped with through-hole (42) on depression bar (4), through-hole (42) with dead lever (31) correspond the setting, depression bar (4) and press down between hole (41) the hole bottom fixed connection second spring (43).
- 3. The UHPC underground ultra-high strength novel duct piece of claim 2, wherein: the upper end of each compression bar (4) is fixedly connected with a first rubber block (44).
- 4. The UHPC underground ultrahigh-strength novel duct sheet according to claim 1, characterized in that: one end of each fixing rod (31) is fixedly connected with a second rubber block (311).
- 5. The UHPC underground ultrahigh-strength novel duct sheet according to claim 1, characterized in that: each slot (11) lateral wall all fixed connection sealing rod (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110152646.1A CN112814703A (en) | 2021-02-03 | 2021-02-03 | UHPC underground ultrahigh-strength novel duct piece |
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| CN202110152646.1A CN112814703A (en) | 2021-02-03 | 2021-02-03 | UHPC underground ultrahigh-strength novel duct piece |
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| CN112814703A true CN112814703A (en) | 2021-05-18 |
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| CN202110152646.1A Pending CN112814703A (en) | 2021-02-03 | 2021-02-03 | UHPC underground ultrahigh-strength novel duct piece |
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Cited By (1)
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| CN115012984A (en) * | 2022-08-05 | 2022-09-06 | 湖南大学 | Phase change thermal insulation layer-UHPC combined shield segment capable of being assembled quickly |
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| CN115012984B (en) * | 2022-08-05 | 2022-11-22 | 湖南大学 | Phase change thermal insulation layer-UHPC combined shield segment capable of being assembled quickly |
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Application publication date: 20210518 |