CN102767378A - Double-column type tunnel portal method for bent frame construction tunnel - Google Patents
Double-column type tunnel portal method for bent frame construction tunnel Download PDFInfo
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- CN102767378A CN102767378A CN2012101737001A CN201210173700A CN102767378A CN 102767378 A CN102767378 A CN 102767378A CN 2012101737001 A CN2012101737001 A CN 2012101737001A CN 201210173700 A CN201210173700 A CN 201210173700A CN 102767378 A CN102767378 A CN 102767378A
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- 238000010276 construction Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- 238000009434 installation Methods 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 12
- 239000002023 wood Substances 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 3
- 235000011613 Pinus brutia Nutrition 0.000 claims description 3
- 241000018646 Pinus brutia Species 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 claims description 3
- 239000007888 film coating Substances 0.000 claims description 3
- 238000009501 film coating Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011120 plywood Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009415 formwork Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009416 shuttering Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a bent frame construction tunnel double-column type tunnel portal method, which comprises the following steps: pouring foundation concrete and leveling a foundation; erecting a scaffold; constructing and reinforcing a template; pouring concrete on the wall body of the end wall; and constructing the end wall upright column template. The method for constructing the tunnel portal concrete can meet the construction quality requirement, is convenient for field operation control, does not influence the execution of other working procedures in the tunnel, and ensures the safety of the construction process.
Description
Technical field
The present invention relates to a kind of framed bent construction tunnel queen post portal method.
Background technology
Eight bush tunnels, iron clad road, capital are that envelope curve Jining, capital to header section increases and builds the second two-wire emphasis Control Engineering; Tunnel the beginning and the end mileage DK525+046～DK533+230; Total length 8184m, according to actual landform, geological conditions, slope excavation height is faced upward on the control limit; Consider the harmony of portal and surrounding environment, the portal headwall adopts queen post portal headwall pattern.
Portal headwall design Breadth Maximum is 50.18m, design height 14.79m, and wall thickness 1.7 ~ 3.0m, the metope gradient is 10:1, adopts steel concrete casting and constructing (design concreting side amount 946m
3)., lining arch top bit concrete formwork erection big to portal headwall section built difficulty, and we determine to adopt the scaffold support shuttering that headwall and top, hole concrete are built.Other considers headwall and column monobloc cast formwork erection difficulty, and we are employed in headwall and reserve and connect the mode that a batch reinforcing bar, column adopt the typing punching block separately to build and build.Through taking above-mentioned measure, completed successfully under the situation that does not influence in-cavity construction that portal headwall and column are concrete builds.
The present invention is directed to actual landform, geological conditions, a kind of construction scheme efficiently is provided.
Summary of the invention
The present invention provides a kind of can satisfy the construction quality requirement, is convenient to execute-in-place control, does not influence the carrying out of other operation construction operations in the tunnel, has guaranteed the framed bent construction tunnel queen post portal method of work progress safety.
Technical solution problem of the present invention provides following scheme:
A kind of framed bent construction tunnel queen post portal method may further comprise the steps:
A) base concrete is built and the ground leveling;
B) scaffold building;
C) template construction and reinforcing;
D) headwall wall body concrete pouring construction;
E) headwall model of the column and concrete construction;
Specifically comprise step by step following among the said step a:
1. at first in the headwall work progress, carry out the headwall base concrete and build;
2. secondly for making things convenient for postorder template construction and reinforcing, decision is widened 20-30cm on the basis of former concreting design basis width;
3. treat base concrete build finish after, the ground in the scaffold boundary of works area is carried out spreading leveling, guarantee in the scaffold building scope basis and draining all around is unimpeded, ponding not;
Specifically comprise following steps among the said step b:
1. tell somebody what one's real intentions are according to designing and calculating and scheme and carry out scaffold building, in setting up process, consider the needs of headwall concreting in lifts; Said scaffold is constructed at twice, carries out the first floor scaffold earlier and sets up: at first on the ground of headwall one side, lay a plurality of chocks, a plurality of perpendicular supports are installed on the said chock; Between a plurality of perpendicular supports, fixedly mount stull; The horizontal bridging of fixed installation between said stull and the perpendicular support, a side fixed support of said perpendicular support has diagonal brace, and scaffolding height is 5-7m;
2. carry out setting up of second layer scaffold again; Above the first floor scaffold, continue to set up stull and perpendicular support; On the sidewall of headwall, be drilled with boring, mounting reinforcing steel bars in boring, said reinforcing bar is reinforced the stull of scaffold; Between adjacent two stulls, lay foot guard plate, scaffolding height is 13-15m;
3. after first floor scaffold and second layer scaffold set up completion, at the close order safety net of the outer parcel of scaffold;
4. for guaranteeing normal construction in the hole, on the scaffold of tunnel portal, reserve 2 door openings, as crossing vehicle passage and geomantic omen tube passage;
5. after treating that scaffold building is accomplished, tissue engineering technique and peace matter personnel carry out safe mass and check and accept;
Specifically comprise following steps among the said step c:
1. in the building of scaffold, carry out setting up of template; At first a plurality of transverse reinforcements of fixed installation support on the end face of headwall; Between a plurality of transverse reinforcements, set up vertical reinforcement again, in the fixing welding of end " L " type support of transverse reinforcement, " L " type that template is leaned against supports;
2. along end wall surface vertical supporting steel pipe is installed again after, the horizontal steel pipe of fixed installation is pressed purlin between vertical supporting steel pipe again, and said steel pipe presses purlin to be pressed in the template top, and clamping pine wood a tree, used in making timber for boats compresses template between said steel pipe and the template;
Said steps d specifically comprises following steps:
1. adopt the mechanical hoisting funnel, funnel is transported to headwall and template top, gap between funnel feed opening aligning headwall and the template is poured into a mould, said headwall wall body concrete divides builds for three times, builds for the first time highly to be 3.5m on basic end face;
2. treat after the first floor concrete setting, carry out again building the second time, build to the lining arch top bit;
3. treat to build for the third time after the second layer concrete setting, build to more than the lining cutting vault and cap stone position;
4. after treating that the headwall concrete solidifies fully,, accomplish building of headwall with the template dismounting;
Said step e specifically comprises following steps:
1. reserve in stud in advance on one's body at the headwall wall of building and connect a batch reinforcing bar, protruded length is different on-the-spot concrete definite according to column thickness;
2. model of the column is installed; Said model of the column is employed in the headwall wall body of constructing and is drilled with the mode that hole for the expansion bolt and scaffold support and fixes; The headwall model of the column adopts typing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts the channel-section steel ribbing to support;
3. after treating that the template fixed installation is good, carry out concreting;
4. treat after concrete setting well template and scaffold to be removed, carry out quality examination again and check and accept.
Said scaffold adopts standard steel pipe and fastener to construct, and it sets up advance is 1.2m, transfer 1.3m, and step pitch adopts 1.5m, the pole clearance chock 0.2m that sweeps the floor, 0.3m at the bottom of the inside stand pole clearance headwall.
The said headroom size of reserving vehicle passage and geomantic omen tube passage is respectively 4.8m*4.75m, 2.4m*3.0 m.
Said headwall template adopts 18mm film coating plywood and the thick plastic-aluminum sheet material of 5mm to carry out processing and fabricating, and the support of the 10*10cm lumps of wood, spacing 0.3m are vertically established in the template back side; Lumps of wood support outside laterally adopts two row's standard steel pipes to do the pressure purlin, spacing 0.6m, and the mode that the form joint consolidation process adopts double φ 48 steel pipes and the lumps of wood to support is reinforced.
Headwall wall body concrete pouring construction, headwall wall body concrete divides builds for three times, builds for the first time highly to be 3.5m on basic end face to build to the lining arch top bit for the second time, builds the above and cap stone position of lining cutting vault for the third time.Concrete field by using mechanical hoisting funnel mode is built.
Because of headwall concreting belongs to mass concrete construction; In the process of building; Decision is mainly from reducing hydration heat of cement, reduction concrete molding temperature, embedded steel tube water flowing heat radiation, strengthening concrete curing; Several respects such as strict control striking time are carried out concrete temperature control work, guarantee that internal-external temperature difference is controlled in 20 ° of C, and assurance headwall concrete is accomplished smoothly and built.
Headwall model of the column and concrete construction treat to begin to construct after the concreting of headwall wall body finishes the headwall column.The headwall model of the column adopts typing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts the channel-section steel ribbing to support.During the concrete construction of headwall metope; Reserve in stud in advance and connect a batch reinforcing bar, connect batch reinforcing bar and adopt the construction of φ 16 screw-thread steels, rebar spacing 30*30cm; Length of embedment 50cm, protruded length is according to column thickness different on-the-spot concrete confirm (construction of headwall model of the column sees Fig. 7 for details).
Model of the column is employed in the headwall wall body of constructing and is drilled with the mode that hole for the expansion bolt and scaffold support and fixes.
Construction precautions
1, during the entrance construction scaffold, the scene must be established the special messenger and commanded vehicle turnover in the hole, crosses vehicle passage and must install crash bearer and carry out alarming sign for four jiaos, crosses 20m position, the place ahead, vehicle passage both sides in addition limited speed belt must be set.
2, the reply ground flattens and spreading is handled before the scaffold building, disposes can carry out the next procedure construction after qualified on inspection.
3, during scaffold building, must tell somebody what one's real intentions are in strict accordance with designing and calculating and scheme and construct, set up completion after, agree without the security staff, forbid arbitrarily to remove fastener and connector.
4, scaffold connects and must use standard fastener to construct, and joint will stagger, and bolt is fastening.
Must stop scaffold building when 5, meeting the strong wind thunderstorm weather, remove operation.Behind strong wind, heavy rain weather, must carry out comprehensive maintenance and inspection, can continue construction after the passed examination construction scaffolding.
When 6, removing scaffold, should establish guardrail or caution notice on every side, and should remove from top to down, double-deck operation up and down.Scaffold, the transmission of plate using artificial or the crane removed hang and send, and close inspection, must hang that steady rear is capable of hoisting to be sent, and forbid random throwing.
Section is big, the tunnel portal of novel structure is along with the lifting of class of track and design concept, in the traffic network construction, can often run into.Adopt the method construction tunnel portal concrete, can satisfy the construction quality requirement, be convenient to execute-in-place control, do not influence the carrying out of other operation construction operations in the tunnel, guaranteed the safety of work progress.This job practices development prospect is better.
This method constructing operation is practical simply, construction speed is fast, does not influence other operations constructions of tunnel, has guaranteed the safety of work progress, and similar tunnel portal construction is had certain experiences and directive function.
Description of drawings
Fig. 1: the portal headwall scaffold whole elevation of constructing.
Fig. 2: the scaffold sectional drawing of constructing for the first time.
Fig. 3: the scaffold sectional drawing of constructing for the second time.
Fig. 4: formwork bracing system sketch map.
Fig. 5: sketch map is reinforced in form joint.
Fig. 6: " L " type support location sketch map.
Fig. 7: headwall model of the column construction sketch map.
The specific embodiment
Referring to accompanying drawing, a kind of framed bent construction tunnel queen post portal method may further comprise the steps:
F) base concrete is built and the ground leveling;
G) scaffold building;
H) template construction and reinforcing;
I) headwall wall body concrete pouring construction;
J) headwall model of the column and concrete construction;
Specifically comprise step by step following among the said step a:
1. at first in the headwall work progress, carry out the headwall base concrete and build;
2. secondly for making things convenient for postorder template construction and reinforcing, decision is widened 20-30cm on the basis of former concreting design basis width;
3. treat base concrete build finish after, the ground in the scaffold boundary of works area is carried out spreading leveling, guarantee in the scaffold building scope basis and draining all around is unimpeded, ponding not;
Specifically comprise following steps among the said step b:
1. tell somebody what one's real intentions are according to designing and calculating and scheme and carry out scaffold building; In setting up process, consider the needs of headwall concreting in lifts, said scaffold is constructed at twice; Carrying out first floor scaffold 1 earlier sets up: at first on the ground of headwall one side, lay a plurality of chocks; A plurality of perpendicular supports are installed on the said chock, between a plurality of perpendicular supports, fixedly mount stull, the horizontal bridging of fixed installation between said stull and the perpendicular support; One side fixed support of said perpendicular support has diagonal brace, and scaffolding height is 5-7m;
2. carry out setting up of second layer scaffold 2 again; Above the first floor scaffold, continue to set up stull and perpendicular support; On the sidewall of headwall, be drilled with boring, mounting reinforcing steel bars in boring, said reinforcing bar is reinforced the stull of scaffold; Between adjacent two stulls, lay foot guard plate, scaffolding height is 13-15m;
3. after first floor scaffold and second layer scaffold set up completion, at the close order safety net of the outer parcel of scaffold;
4. for guaranteeing normal construction in the hole, on the scaffold of tunnel portal, reserve 2 door openings, as crossing vehicle passage and geomantic omen tube passage;
5. after treating that scaffold building is accomplished, tissue engineering technique and peace matter personnel carry out safe mass and check and accept;
Specifically comprise following steps among the said step c:
1. in the building of scaffold, carry out setting up of template; At first a plurality of transverse reinforcements of fixed installation support on the end face of headwall; Between a plurality of transverse reinforcements, set up vertical reinforcement again, in the fixing welding of end " L " type support of transverse reinforcement, " L " type that template is leaned against supports;
2. along end wall surface vertical supporting steel pipe is installed again after, the horizontal steel pipe of fixed installation is pressed purlin between vertical supporting steel pipe again, and said steel pipe presses purlin to be pressed in the template top, and clamping pine wood a tree, used in making timber for boats compresses template between said steel pipe and the template;
Said steps d specifically comprises following steps:
1. adopt the mechanical hoisting funnel, funnel is transported to headwall and template top, gap between funnel feed opening aligning headwall and the template is poured into a mould, said headwall wall body concrete divides builds for three times, builds for the first time highly to be 3.5m on basic end face;
2. treat after the first floor concrete setting, carry out again building the second time, build to the lining arch top bit;
3. treat to build for the third time after the second layer concrete setting, build to more than the lining cutting vault and cap stone position;
4. after treating that the headwall concrete solidifies fully,, accomplish building of headwall with the template dismounting;
Said step e specifically comprises following steps:
1. reserve in stud in advance on one's body at the headwall wall of building and connect a batch reinforcing bar, protruded length is different on-the-spot concrete definite according to column thickness;
2. model of the column is installed; Said model of the column is employed in the headwall wall body of constructing and is drilled with the mode that hole for the expansion bolt and scaffold support and fixes; The headwall model of the column adopts typing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts the channel-section steel ribbing to support;
3. after treating that the template fixed installation is good, carry out concreting;
4. treat after concrete setting well template and scaffold to be removed, carry out quality examination again and check and accept.
Said scaffold adopts standard steel pipe and fastener to construct, and it sets up advance is 1.2m, transfer 1.3m, and step pitch adopts 1.5m, the pole clearance chock 0.2m that sweeps the floor, 0.3m at the bottom of the inside stand pole clearance headwall.
The said headroom size of reserving vehicle passage and geomantic omen tube passage is respectively 4.8m*4.75m, 2.4m*3.0 m.
Said headwall template adopts 18mm film coating plywood and the thick plastic-aluminum sheet material of 5mm to carry out processing and fabricating, and the support of the 10*10cm lumps of wood, spacing 0.3m are vertically established in the template back side; Lumps of wood support outside laterally adopts two row's standard steel pipes to do the pressure purlin, spacing 0.6m, and the mode that the form joint consolidation process adopts double φ 48 steel pipes and the lumps of wood to support is reinforced.
Headwall wall body concrete pouring construction, headwall wall body concrete divides builds for three times, builds for the first time highly to be 3.5m on basic end face to build to the lining arch top bit for the second time, builds the above and cap stone position of lining cutting vault for the third time.Concrete field by using mechanical hoisting funnel mode is built.
Claims (4)
1. framed bent construction tunnel queen post portal method may further comprise the steps:
A) base concrete is built and the ground leveling;
B) scaffold building;
C) template construction and reinforcing;
D) headwall wall body concrete pouring construction;
E) headwall model of the column and concrete construction;
It is characterized in that: specifically comprise step by step following among the said step a:
1. at first in the headwall work progress, carry out the headwall base concrete and build;
2. secondly for making things convenient for postorder template construction and reinforcing, decision is widened 20-30cm on the basis of former concreting design basis width;
3. treat base concrete build finish after, the ground in the scaffold boundary of works area is carried out spreading leveling, guarantee in the scaffold building scope basis and draining all around is unimpeded, ponding not;
Specifically comprise following steps among the said step b:
1. tell somebody what one's real intentions are according to designing and calculating and scheme and carry out scaffold building, in setting up process, consider the needs of headwall concreting in lifts; Said scaffold is constructed at twice, carries out the first floor scaffold earlier and sets up: at first on the ground of headwall one side, lay a plurality of chocks, a plurality of perpendicular supports are installed on the said chock; Between a plurality of perpendicular supports, fixedly mount stull; The horizontal bridging of fixed installation between said stull and the perpendicular support, a side fixed support of said perpendicular support has diagonal brace, and scaffolding height is 5-7m;
2. carry out setting up of second layer scaffold again; Above the first floor scaffold, continue to set up stull and perpendicular support; On the sidewall of headwall, hole, skyhook in boring, said anchor pole is reinforced the stull of scaffold; Between adjacent two stulls, lay foot guard plate, scaffolding height is 13-15m;
3. after first floor scaffold and second layer scaffold set up completion, at the close order safety net of the outer parcel of scaffold;
4. for guaranteeing normal construction in the hole, on the scaffold of tunnel portal, reserve 2 door openings, as crossing vehicle passage and geomantic omen tube passage;
5. after treating that scaffold building is accomplished, tissue engineering technique and peace matter personnel carry out safe mass and check and accept;
Specifically comprise following steps among the said step c:
1. in the building of scaffold, carry out setting up of template; At first a plurality of transverse reinforcements of fixed installation support on the end face of headwall; Between a plurality of transverse reinforcements, set up vertical reinforcement again, in the fixing welding of end " L " type support of transverse reinforcement, " L " type that template is leaned against supports;
2. along end wall surface vertical supporting steel pipe is installed again after, the horizontal steel pipe of fixed installation is pressed purlin between vertical supporting steel pipe again, and said steel pipe presses purlin to be pressed in the template top, and clamping pine wood a tree, used in making timber for boats compresses template between said steel pipe and the template;
Said steps d specifically comprises following steps:
1. adopt the mechanical hoisting funnel, funnel is transported to headwall and template top, gap between funnel feed opening aligning headwall and the template is poured into a mould, said headwall wall body concrete divides builds for three times, builds for the first time highly to be 3.5m on basic end face;
2. treat after the first floor concrete setting, carry out again building the second time, build to the lining arch top bit;
3. treat to build for the third time after the second layer concrete setting, build to more than the lining cutting vault and cap stone position;
4. after treating that the headwall concrete solidifies fully,, accomplish building of headwall with the template dismounting;
Said step e specifically comprises following steps:
1. reserve in stud in advance on one's body at the headwall wall of building and connect a batch reinforcing bar, protruded length is different on-the-spot concrete definite according to column thickness;
2. model of the column is installed; Said model of the column is employed in the headwall wall body of constructing and is drilled with the mode that hole for the expansion bolt and scaffold support and fixes; The headwall model of the column adopts typing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts the channel-section steel ribbing to support;
3. after treating that the template fixed installation is good, carry out concreting;
4. treat after concrete setting well template and scaffold to be removed, carry out quality examination again and check and accept.
2. according to the said framed bent construction tunnel of claim 1 queen post portal method, it is characterized in that: said scaffold adopts standard steel pipe and fastener to construct, and it sets up advance is 1.2m; Transfer 1.3m; Step pitch adopts 1.5m, the pole clearance chock 0.2m that sweeps the floor, 0.3m at the bottom of the inside stand pole clearance headwall.
3. according to the said framed bent construction tunnel of claim 1 queen post portal method, it is characterized in that: the said headroom size of reserving vehicle passage and geomantic omen tube passage is respectively 4.8m*4.75m, 2.4m*3.0 m.
4. according to the said framed bent construction tunnel of claim 1 queen post portal method, it is characterized in that: said headwall template adopts 18mm film coating plywood and the thick plastic-aluminum sheet material of 5mm to carry out processing and fabricating, and the support of the 10*10cm lumps of wood, spacing 0.3m are vertically established in the template back side; Lumps of wood support outside laterally adopts two row's standard steel pipes to do the pressure purlin, spacing 0.6m, and the mode that the form joint consolidation process adopts double φ 48 steel pipes and the lumps of wood to support is reinforced.
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| CN105649651A (en) * | 2015-12-31 | 2016-06-08 | 中铁二十五局集团第五工程有限公司 | Construction method of secondary tunnel lining |
| CN106812090A (en) * | 2017-03-28 | 2017-06-09 | 四川西南交大土木工程设计有限公司 | It is a kind of to can be used for the new road anti-collision facility construction of underground space ventilation |
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| CN106812090A (en) * | 2017-03-28 | 2017-06-09 | 四川西南交大土木工程设计有限公司 | It is a kind of to can be used for the new road anti-collision facility construction of underground space ventilation |
| CN106812090B (en) * | 2017-03-28 | 2022-04-15 | 四川西南交大土木工程设计有限公司 | Road anti-collision facility structure capable of being used for ventilation of underground space |
| CN108691416A (en) * | 2018-06-21 | 2018-10-23 | 中铁建工集团有限公司 | Cast-in-place special-shaped beam plain form system with arc-shaped side edges |
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| CN102767378B (en) | 2014-04-09 |
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