CN109209438A - A kind of tunnel lining structure construction method using steel fiber reinforced concrete - Google Patents

A kind of tunnel lining structure construction method using steel fiber reinforced concrete Download PDF

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Publication number
CN109209438A
CN109209438A CN201811208450.4A CN201811208450A CN109209438A CN 109209438 A CN109209438 A CN 109209438A CN 201811208450 A CN201811208450 A CN 201811208450A CN 109209438 A CN109209438 A CN 109209438A
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China
Prior art keywords
fiber reinforced
steel
reinforced concrete
concrete
steel fiber
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Granted
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CN201811208450.4A
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Chinese (zh)
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CN109209438B (en
Inventor
杜庆远
李庚丰
郭玉峰
张海鹏
董秋梦
那琦
马宏韬
杨铭
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The Third Railway Survey and Design Institute Co., Ltd
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JINZHOU RAILWAY SURVEY DESIGN CONSULTING CO Ltd
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/48—Metal
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements

Abstract

A kind of tunnel lining structure construction method using steel fiber reinforced concrete, specific steel fiber reinforced concrete is prepared using cement, flyash, fine aggregate, coarse aggregate and steel fibre, and use steel fiber reinforced concrete structure, instead of stirrup method, carry out tunnel lining structure construction, solve the problems, such as pouring quality caused by liner structure reinforcing bar network arrangements are overstocked it is difficult to ensure that, so that effectively control critical eigenvalue is carried out, improve the durability of liner structure.The invention improves anti-shear concrete, and structure has good ductility after construction.

Description

A kind of tunnel lining structure construction method using steel fiber reinforced concrete
Technical field
The present invention relates to hypogee technical field of construction, and in particular to a kind of tunnel-liner using steel fiber reinforced concrete Construction method.
Background technique
At present in general Subway Tunnel construction, using the section of shield-tunneling construction, the design of shield lining segment is by shield Producer is empirically or shield type proposes, often has much relations with the type selecting of shield machine, cannot consider geology item completely The otherness of part；Using the section of hand excavation, tunnel just branch lining cutting is using cast-in-place gunite concrete, due to execution conditions Limitation, in addition the arrangement of lining cutting steel mesh is overstocked, lead to pouring quality it is difficult to ensure that, while subway tunnel is by the reciprocal lotus of train It carries, accelerates the crack progressing of lining segment, influence the intensity and durability of lining segment, have to the overall security in tunnel great It influences.
Summary of the invention
In view of the above problems, the invention proposes a kind of tunnel lining structure construction party using steel fiber reinforced concrete Method, instead of stirrup method, efficiently solves that liner structure reinforcing bar network arrangements are overstocked to be made using specific steel fiber reinforced concrete structure At pouring quality it is difficult to ensure that the problem of, thus effectively control critical eigenvalue carry out, improve the durability of liner structure.
To achieve the goals above, a kind of technical solution that the invention uses are as follows: tunnel using steel fiber reinforced concrete Road liner structure construction method, which is characterized in that the steps include:
Step 1) makes steel fiber reinforced concrete；
Step 2) steel fiber reinforced concrete is alternately symmetrically poured using layering, left and right, and every layer pours thickness less than 0.5m, two sides Within 1.5m, delivery hose nozzle to the face that pours hangs down away from control within 2.0m, to prevent concrete disintegration highness change；
Step 3) determines people and positions to be vibrated with the immersion vibrator mode of making firm by ramming, guarantees concrete compaction；Spring line with Under be aided with outside wooden mallet mould and strike vibration and immersion vibrator is made firm by ramming, to inhibit the bubble of concrete surface to generate；
Steel pipe drape process is used when step 4) tunnel-liner is bound, and selects slump, the perfusing hole pressure from arch Note binds；
Step 5) demoulding: concrete strength reaches 8.0MPa or more, carries out demoulding；If preliminary bracing is not stable, secondary lining Concrete strength need to reach 70% of design strength or more when block performs in advance；
Concrete surface is sprayed with high pressure water after step 6) demoulding, reduces the heat of hydration, then carry out late maintaining.
Steel fiber reinforced concrete used in the tunnel lining structure construction method using steel fiber reinforced concrete, it is special Sign is: including cement, flyash, fine aggregate, coarse aggregate and steel fibre in the steel fiber reinforced concrete.
The concrete composition of cement, flyash, fine aggregate, coarse aggregate and steel fibre are as follows:
1) cement: ordinary portland cement PI 42.5 and PI 52.5, the density 3150Kg/m of cement material3；
2) flyash: density 2200Kg/m3, 28d compressive strength rate is 50%；
3) fine aggregate: river sand apparent density is 2700Kg/m3, middle sand；
4) coarse aggregate: rubble of the diameter between 5~10mm, bulk density 1600Kg/m3, apparent density is 2600Kg/m；
5)) steel fibre: steel fibre selects any one in 1 three kinds of steel fibres of table, and parameter is as follows:
Table 1: steel fibre parameter
It include the match ratio of cement, flyash, fine aggregate, coarse aggregate and steel fibre in the steel fiber reinforced concrete Are as follows: cement 442kg/m3, flyash 160kg/m3, water 194kg/m3, fine aggregate 730kg/m3, coarse aggregate 726kg/m3, water-reducing agent 1.08%, steel fibre 40kg/m3。
The preparation method of the steel fiber reinforced concrete, it is characterised in that:
Calculating of the step 1) according to match ratio, determines every dosage；
Coarse aggregate and steel fibre are added in blender step 2), half a minute are stirred, so that steel fibre is evenly distributed on slightly In aggregate；
Cement and fine aggregate are added in step 3) blender, allows coarse aggregate, fine aggregate, cement, steel fibre in dry feelings It is stirred under condition, stirs half a minute；
The water that predetermined ratio is added in step 4) stirs three minutes, and required steel fiber reinforced concrete is made.
The invention has the beneficial effect that
1, the anti-shear concrete performance of steel fibre substitution stirrup is improved.The addition of steel fibre can change the destruction of component Form especially becomes the bending failure of ductility from brittle failure by shear.
2, under geological process, steel fiber reinforced concrete segment alleviates stress concentration, improves the ductility of structure, is also its limit More safety stocks have been done in destruction.
3, under severe earthquake action, steel fiber reinforced concrete segment energy dissipation capacity is stronger, and has when reaching capacity state Good ductility.
Specific embodiment
A kind of tunnel lining structure construction method using steel fiber reinforced concrete, the steps include:
Step 1) makes steel fiber reinforced concrete；
Step 2) steel fiber reinforced concrete is alternately symmetrically poured using layering, left and right, and every layer pours thickness less than 0.5m, two sides Within 1.5m, delivery hose nozzle to the face that pours hangs down away from control within 2.0m, to prevent concrete disintegration highness change；
Step 3) determines people and positions to be vibrated with the immersion vibrator mode of making firm by ramming, guarantees concrete compaction；Spring line with Under be aided with outside wooden mallet mould and strike vibration and immersion vibrator is made firm by ramming, to inhibit the bubble of concrete surface to generate；
Steel pipe drape process is used when step 4) tunnel-liner is bound, according to normative choice slump, from arch Perfusing hole pressure injection binds；
Step 5) demoulding: concrete strength reaches 8.0MPa or more, carries out demoulding；If preliminary bracing is not stable, secondary lining When block performs in advance, the preliminary bracings concrete strength such as need reaches 70% of design strength or more；
Concrete surface is sprayed with high pressure water after step 6) demoulding, reduces the heat of hydration, then carry out late maintaining, curing period is not Less than 14 days.
It include cement, flyash, fine aggregate, coarse aggregate and steel fibre in the steel fiber reinforced concrete.
The concrete composition of cement, flyash, fine aggregate, coarse aggregate and steel fibre are as follows:
1) cement: ordinary portland cement PI 42.5 and PI 52.5, the density 3150Kg/m of cement material3；
2) flyash: density 2200Kg/m3, 28d compressive strength rate is 50%；
3) fine aggregate: river sand apparent density is 2700Kg/m3, middle sand；
4) coarse aggregate: rubble of the diameter between 5~10mm, bulk density 1600Kg/m3, apparent density is 2600Kg/m；
5) steel fibre: steel fibre selects any one in 1 three kinds of steel fibres of table, and parameter is as follows:
Table 1: steel fibre parameter
It include the match ratio of cement, flyash, fine aggregate, coarse aggregate and steel fibre in the steel fiber reinforced concrete Are as follows: cement 442kg/m3, flyash 160kg/m3, water 194kg/m3, fine aggregate 730kg/m3, coarse aggregate 726kg/m3, water-reducing agent 1.08%, steel fibre 40kg/m3。
The preparation method of the steel fiber reinforced concrete, the steps include:
Calculating of the step 1) according to match ratio, determines every dosage；
Coarse aggregate and steel fibre are added in blender step 2), half a minute are stirred, so that steel fibre is evenly distributed on slightly In aggregate；
Cement and fine aggregate are added in step 3) blender, allows coarse aggregate, fine aggregate, cement, steel fibre in dry feelings It is stirred under condition, stirs half a minute；
The water that predetermined ratio is added in step 4) stirs three minutes, and required steel fiber reinforced concrete is made.

Claims (5)

1. a kind of tunnel lining structure construction method using steel fiber reinforced concrete, which is characterized in that the steps include:
Step 1) makes steel fiber reinforced concrete；
Step 2) steel fiber reinforced concrete is alternately symmetrically poured using layering, left and right, and every layer pours thickness less than 0.5m, two sides height difference Within 1.5m, delivery hose nozzle to the face that pours hangs down away from control within 2.0m, to prevent concrete disintegration for control；
Step 3) determines people and positions to be vibrated with the immersion vibrator mode of making firm by ramming, guarantees concrete compaction；It is auxiliary below spring line Vibration is struck outside with wooden mallet mould and immersion vibrator is made firm by ramming, to inhibit the bubble of concrete surface to generate；
Steel pipe drape process is used when step 4) tunnel-liner is bound, selects slump, is sealed from the perfusing hole pressure injection of arch Top；
Step 5) demoulding: concrete strength reaches 8.0MPa or more, carries out demoulding；If preliminary bracing is not stable, secondary lining is mentioned Before when performing concrete strength should reach 70% of design strength or more；
Concrete surface is sprayed with high pressure water after step 6) demoulding, reduces the heat of hydration, then carry out late maintaining.
2. steel fibre used in a kind of tunnel lining structure construction method described in claim 1 using steel fiber reinforced concrete Concrete, it is characterised in that: include that cement, flyash, fine aggregate, coarse aggregate and steel are fine in the steel fiber reinforced concrete Dimension.
3. steel fiber reinforced concrete according to claim 2, it is characterised in that: cement, flyash, fine aggregate, coarse aggregate and The concrete composition of steel fibre are as follows:
1) cement: ordinary portland cement PI 42.5 and PI 52.5, the density 3150Kg/m of cement material3；
2) flyash: density 2200Kg/m3, 28d compressive strength rate is 50%；
3) fine aggregate: river sand apparent density is 2700Kg/m3, middle sand；
4) coarse aggregate: rubble of the diameter between 5~10mm, bulk density 1600Kg/m3, apparent density 2600Kg/m；
5) steel fibre: steel fibre selects any one in 1 three kinds of steel fibres of table, and parameter is as follows:
Table 1: steel fibre parameter
4. steel fiber reinforced concrete according to claim 2, it is characterised in that: include water in the steel fiber reinforced concrete The match ratio of mud, flyash, fine aggregate, coarse aggregate and steel fibre are as follows: cement 442kg/m3, flyash 160kg/m3, water 194kg/ m3, fine aggregate 730kg/m3, coarse aggregate 726kg/m3, water-reducing agent 1.08%, steel fibre 40kg/m3。
5. a kind of preparation method of steel fiber reinforced concrete described in claim 4, it is characterised in that:
Calculating of the step 1) according to match ratio, determines every dosage；
Coarse aggregate and steel fibre are added in blender step 2), half a minute are stirred, so that steel fibre is evenly distributed on coarse aggregate In；
Cement and fine aggregate are added in step 3) blender, allow coarse aggregate, fine aggregate, cement, steel fibre in dry conditions It is stirred, stirs half a minute；
The water that predetermined ratio is added in step 4) stirs three minutes, and required steel fiber reinforced concrete is made.
CN201811208450.4A 2018-10-17 2018-10-17 Construction method of tunnel lining structure by using steel fiber concrete Active CN109209438B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109678429A (en) * 2019-01-31 2019-04-26 青岛市地铁一号线有限公司 A kind of preparation method of the no muscle steel fiber reinforced concrete segment in the tunnel TBM
CN110966022A (en) * 2019-12-24 2020-04-07 中铁隧道局集团有限公司工程试验分公司 Railway tunnel lining construction method based on medium-high fluidity concrete
CN111119947A (en) * 2020-03-03 2020-05-08 西南交通大学 Construction method of fault-crossing open-cut subway tunnel
CN113213839A (en) * 2021-05-14 2021-08-06 福建新华夏建工集团有限公司 Concrete building member crack prevention and control method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104773988A (en) * 2015-04-03 2015-07-15 东南大学 Steam-curing-free early-strength steel fiber concrete pipe segment and preparation method thereof

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
CN104773988A (en) * 2015-04-03 2015-07-15 东南大学 Steam-curing-free early-strength steel fiber concrete pipe segment and preparation method thereof

Non-Patent Citations (3)

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李顺平: "湟水北干渠隧洞混凝土施工工艺和方法", 《甘肃水利水电技术》 *
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芦瑞玲: "高速公路隧道墙带仰拱复合式衬砌混凝土技术", 《门窗》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109678429A (en) * 2019-01-31 2019-04-26 青岛市地铁一号线有限公司 A kind of preparation method of the no muscle steel fiber reinforced concrete segment in the tunnel TBM
CN110966022A (en) * 2019-12-24 2020-04-07 中铁隧道局集团有限公司工程试验分公司 Railway tunnel lining construction method based on medium-high fluidity concrete
CN110966022B (en) * 2019-12-24 2022-03-11 中铁隧道局集团有限公司 Railway tunnel lining construction method based on medium-high fluidity concrete
CN111119947A (en) * 2020-03-03 2020-05-08 西南交通大学 Construction method of fault-crossing open-cut subway tunnel
CN113213839A (en) * 2021-05-14 2021-08-06 福建新华夏建工集团有限公司 Concrete building member crack prevention and control method

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Effective date of registration: 20201023

Address after: No.10, Zhongshan Road, Hongshunli street, Hebei District, Tianjin

Patentee after: The Third Railway Survey and Design Institute Co., Ltd

Address before: Jinzhou City, Liaoning Province, 121000 Heping Road Linghe District No. 20 four

Patentee before: JINZHOU RAILWAY SURVEY & DESIGN INSTITUTE Co.,Ltd.