CN102767378B - Method for constructing distyle tunnel portal by framed bent - Google Patents

Method for constructing distyle tunnel portal by framed bent Download PDF

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Publication number
CN102767378B
CN102767378B CN201210173700.1A CN201210173700A CN102767378B CN 102767378 B CN102767378 B CN 102767378B CN 201210173700 A CN201210173700 A CN 201210173700A CN 102767378 B CN102767378 B CN 102767378B
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headwall
scaffold
template
construction
concrete
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CN102767378A (en
Inventor
郑永胜
李波
赵飞
吴波
陈辉
张恩生
刘茂兵
刘学伟
高飞
连小涛
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China Tiesiju Civil Engineering Group Co Ltd CTCE Group
Second Engineering Co Ltd of CTCE Group
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China Tiesiju Civil Engineering Group Co Ltd CTCE Group
Second Engineering Co Ltd of CTCE Group
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Abstract

The invention discloses a method for constructing distyle tunnel portals by a framed bent. The method includes the following steps: concreting and flattening a foundation, erecting a scaffold, constructing and strengthening a module, concreting an end wall body, and constructing stand columns of an end wall. By the aid of the method for constructing the distyle tunnel portals by the framed bent, concreting of the tunnel portals can meet construction quality requirements, spot operation is convenient to control, other construction processes in a tunnel are not influenced, and safety in the construction process is guaranteed.

Description

Framed bent construction tunnel queen post portal method
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 increases and builds the second double line priority control engineering to header section, tunnel the beginning and the end mileage DK525+046~DK533+230, total length 8184m, according to actual landform, geological conditions, control limit and face upward slope excavation height, consider the harmony of portal and surrounding environment, 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 large for portal headwall section built difficulty, and we determine to adopt scaffold support template to build headwall and top, hole concrete.Another consider headwall and column monobloc cast formwork erection difficulty, we adopt and connect the mode that a batch reinforcing bar, column adopt the punching block of shaping separately to build and build headwall is reserved.By taking above-mentioned measure, in the situation that not affecting in-cavity construction, be successfully completed that portal headwall and column are concrete builds.
The present invention is directed to actual landform, geological conditions, a kind of efficient construction scheme is provided.
Summary of the invention
The invention provides and a kind ofly can meet construction quality requirement, be convenient to execute-in-place and control, do not affect the carrying out of other operation construction operations in tunnel, 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 framed bent construction tunnel queen post portal method, comprises the following steps:
A) base concrete is built and 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;
In described step a, specifically comprise step by step following:
1. first in headwall work progress, carry out headwall base concrete and build;
2. secondly for convenience of postorder template construction and reinforcing, determine to widen 20-30cm on the basis of former concreting design basis width;
3. after treating that base concrete is built, the ground within the scope of scaffold construction is carried out to spreading leveling, guarantee within the scope of scaffold building basis and surrounding draining is unimpeded, ponding not;
In described step b, specifically comprise following steps:
1. according to designing and calculating and scheme, tell somebody what one's real intentions are and carry out scaffold building, in setting up process, consider the needs of headwall concreting in lifts, described scaffold is constructed at twice, first carries out first floor scaffold and sets up: first on the ground of headwall one side, lay a plurality of chocks, a plurality of perpendicular supports are installed on described chock, between a plurality of perpendicular supports, fixedly mount stull, between described stull and perpendicular support, fixedly mount horizontal bridging, a side fixed support of described perpendicular support has diagonal brace, and scaffolding height is 5-7m;
2. carry out again setting up of second layer scaffold, above first floor scaffold, continue to set up stull and perpendicular support, on the sidewall of headwall, be drilled with boring, reinforcing bar is installed in boring, described 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 have set up, at the close order safety net of the outer parcel of scaffold;
4. for guaranteeing normal construction in hole, reserved 2 door openings on the scaffold of tunnel portal, as crossing vehicle passage and geomantic omen tube passage;
5. after scaffold building completes, tissue engineering technique and peace matter personnel carry out safe mass examination;
In described step c, specifically comprise following steps:
1. in the building of scaffold, carry out setting up of template, first on the end face of headwall, fixedly mounting a plurality of transverse reinforcements supports, 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. after, along end wall surface, vertical supporting steel pipe is installed again, then between vertical supporting steel pipe, is fixedly mounted horizontal steel pipe pressure purlin, described steel pipe presses purlin to be pressed in template top, and between described steel pipe and template, clamping pine wood a tree, used in making timber for boats compresses template;
Described steps d specifically comprises following steps:
1. adopt mechanical hoisting funnel, funnel is transported to headwall and template top, funnel feed opening is aimed to gap between headwall and template and pour into a mould, described headwall wall body concrete divides builds for three times, and building is for the first time highly 3.5m on basic end face;
2. after treating first floor concrete setting, then build for the second time, build to lining arch top bit;
3. after treating second layer concrete setting, build for the third time, build to more than lining cutting vault and cap stone position;
4., after treating that headwall concrete solidifies completely, by template dismounting, complete building of headwall;
Described step e specifically comprises following steps:
1. at the headwall wall of building, reserve and connect a batch reinforcing bar in advance with it in stud, protruded length is specifically determined according to column thickness Different field;
2. model of the column is installed, the mode that described model of the column employing is drilled with hole for the expansion bolt and scaffold support at the headwall wall body of constructing is fixed, headwall model of the column adopts sizing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts channel-section steel ribbing to support;
3., after treating that template fixedly mounts, carry out concreting;
4. treat after concrete setting well template and scaffold to remove, then carry out quality examination examination.
Described 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, and the bar of sweeping the floor is apart from chock 0.2m, and inner side vertical rod is apart from 0.3m at the bottom of headwall.
The described headroom size of reserving vehicle passage and geomantic omen tube passage is respectively 4.8m*4.75m, 2.4m*3.0 m.
Described 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 pressure purlin, spacing 0.6m, and the mode that 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, and building is for the first time highly 3.5m on basic end face, builds for the second time to lining arch top bit more than building for the third time lining cutting vault and cap stone position.Concrete field by using mechanical hoisting funnel mode is built.
Because headwall concreting belongs to mass concrete construction, in casting process, determine mainly from reducing hydration heat of cement, reduction concrete molding temperature, embedded steel tube water flowing heat radiation, strengthening concrete curing, the strict several respects such as striking time of controlling are carried out concrete temperature control work, guarantee that internal-external temperature difference is controlled in 20 ° of C, guarantee that headwall concrete completes and builds smoothly.
Headwall model of the column and concrete construction, treat to start to construct after the concreting of headwall wall body headwall column.Headwall model of the column adopts sizing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts channel-section steel ribbing to support.During the concrete construction of headwall metope, in stud, reserve and connect a batch reinforcing bar in advance, connect batch reinforcing bar and adopt φ 16 screw-thread steel constructions, rebar spacing 30*30cm, length of embedment 50cm, protruded length is specifically determined (construction of headwall model of the column refers to Fig. 7) according to column thickness Different field.
The mode that model of the column employing is drilled with hole for the expansion bolt and scaffold support at the headwall wall body of constructing is fixed.
Construction precautions
1, during entrance construction scaffold, scene must be established special messenger and be commanded vehicles while passing in hole, crosses four jiaos of vehicle passages and must install crash bearer and carry out alarming sign, and the another 20m position, the place ahead, vehicle passage both sides of crossing must arrange limited speed belt.
2, reply ground flattens and spreading is processed before scaffold building, is disposed after qualified on inspection and can carries out next procedure construction.
3, during scaffold building, must tell somebody what one's real intentions are and construct in strict accordance with designing and calculating and scheme, after having set up, without security staff, agree to, 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.
While 5, meeting strong wind thunderstorm weather, must stop scaffold building, remove operation.After strong wind, heavy rain weather, must carry out comprehensive maintenance and inspection to construction scaffolding, after passed examination, can continue construction.
While 6, removing scaffold, should establish guardrail or caution notice around, and should remove from top to down, must not Dual-layer operation.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 large, the tunnel portal of novel structure is along with the lifting of class of track and design concept, in traffic network construction, can often run into.Adopt the method construction tunnel portal concrete, can meet construction quality requirement, be convenient to execute-in-place and control, do not affect the carrying out of other operation construction operations in tunnel, guaranteed the safety of work progress.This construction method development prospect is better.
The method constructing operation is practical simply, construction speed is fast, does not affect other operations constructions of tunnel, has guaranteed the safety of work progress, and similar tunnel portal construction is had to certain reference and directive function.
Accompanying drawing explanation
Fig. 1: the whole elevation of portal headwall scaffold construction.
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 schematic diagram.
Fig. 5: schematic diagram is reinforced in form joint.
Fig. 6: " L " type support location schematic diagram.
Fig. 7: headwall model of the column construction schematic diagram.
The specific embodiment
Referring to accompanying drawing, a kind of framed bent construction tunnel queen post portal method, comprises the following steps:
F) base concrete is built and 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;
In described step a, specifically comprise step by step following:
1. first in headwall work progress, carry out headwall base concrete and build;
2. secondly for convenience of postorder template construction and reinforcing, determine to widen 20-30cm on the basis of former concreting design basis width;
3. after treating that base concrete is built, the ground within the scope of scaffold construction is carried out to spreading leveling, guarantee within the scope of scaffold building basis and surrounding draining is unimpeded, ponding not;
In described step b, specifically comprise following steps:
1. according to designing and calculating and scheme, tell somebody what one's real intentions are and carry out scaffold building, in setting up process, consider the needs of headwall concreting in lifts, described scaffold is constructed at twice, first carries out first floor scaffold 1 and sets up: first on the ground of headwall one side, lay a plurality of chocks, a plurality of perpendicular supports are installed on described chock, between a plurality of perpendicular supports, fixedly mount stull, between described stull and perpendicular support, fixedly mount horizontal bridging, a side fixed support of described perpendicular support has diagonal brace, and scaffolding height is 5-7m;
2. carry out again setting up of second layer scaffold 2, above first floor scaffold, continue to set up stull and perpendicular support, on the sidewall of headwall, be drilled with boring, reinforcing bar is installed in boring, described 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 have set up, at the close order safety net of the outer parcel of scaffold;
4. for guaranteeing normal construction in hole, reserved 2 door openings on the scaffold of tunnel portal, as crossing vehicle passage and geomantic omen tube passage;
5. after scaffold building completes, tissue engineering technique and peace matter personnel carry out safe mass examination;
In described step c, specifically comprise following steps:
1. in the building of scaffold, carry out setting up of template, first on the end face of headwall, fixedly mounting a plurality of transverse reinforcements supports, 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. after, along end wall surface, vertical supporting steel pipe is installed again, then between vertical supporting steel pipe, is fixedly mounted horizontal steel pipe pressure purlin, described steel pipe presses purlin to be pressed in template top, and between described steel pipe and template, clamping pine wood a tree, used in making timber for boats compresses template;
Described steps d specifically comprises following steps:
1. adopt mechanical hoisting funnel, funnel is transported to headwall and template top, funnel feed opening is aimed to gap between headwall and template and pour into a mould, described headwall wall body concrete divides builds for three times, and building is for the first time highly 3.5m on basic end face;
2. after treating first floor concrete setting, then build for the second time, build to lining arch top bit;
3. after treating second layer concrete setting, build for the third time, build to more than lining cutting vault and cap stone position;
4., after treating that headwall concrete solidifies completely, by template dismounting, complete building of headwall;
Described step e specifically comprises following steps:
1. at the headwall wall of building, reserve and connect a batch reinforcing bar in advance with it in stud, protruded length is specifically determined according to column thickness Different field;
2. model of the column is installed, the mode that described model of the column employing is drilled with hole for the expansion bolt and scaffold support at the headwall wall body of constructing is fixed, headwall model of the column adopts sizing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts channel-section steel ribbing to support;
3., after treating that template fixedly mounts, carry out concreting;
4. treat after concrete setting well template and scaffold to remove, then carry out quality examination examination.
Described 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, and the bar of sweeping the floor is apart from chock 0.2m, and inner side vertical rod is apart from 0.3m at the bottom of headwall.
The described headroom size of reserving vehicle passage and geomantic omen tube passage is respectively 4.8m*4.75m, 2.4m*3.0 m.
Described 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 pressure purlin, spacing 0.6m, and the mode that 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, and building is for the first time highly 3.5m on basic end face, builds for the second time to lining arch top bit more than building for the third time lining cutting vault and cap stone position.Concrete field by using mechanical hoisting funnel mode is built.

Claims (4)

1. a framed bent construction tunnel queen post portal method, comprises the following steps:
A) base concrete is built and 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: in described step a, specifically comprise step by step following:
1. first in headwall work progress, carry out headwall base concrete and build;
2. secondly for convenience of postorder template construction and reinforcing, determine to widen 20-30cm on the basis of former concreting design basis width;
3. after treating that base concrete is built, the ground within the scope of scaffold construction is carried out to spreading leveling, guarantee within the scope of scaffold building basis and surrounding draining is unimpeded, ponding not;
In described step b, specifically comprise following steps:
1. according to designing and calculating and scheme, tell somebody what one's real intentions are and carry out scaffold building, in setting up process, consider the needs of headwall concreting in lifts, described scaffold is constructed at twice, first carries out first floor scaffold and sets up: first on the ground of headwall one side, lay a plurality of chocks, a plurality of perpendicular supports are installed on described chock, between a plurality of perpendicular supports, fixedly mount stull, between described stull and perpendicular support, fixedly mount horizontal bridging, a side fixed support of described perpendicular support has diagonal brace, and scaffolding height is 5-7m;
2. carry out again setting up of second layer scaffold, above first floor scaffold, continue to set up stull and perpendicular support, on the sidewall of headwall, hole, skyhook in boring, described anchor pole is reinforced the stull of scaffold, between adjacent two stulls, lays foot guard plate, and scaffolding height is 13-15m;
3. after first floor scaffold and second layer scaffold have set up, at the close order safety net of the outer parcel of scaffold;
4. for guaranteeing normal construction in hole, reserved 2 door openings on the scaffold of tunnel portal, as crossing vehicle passage and geomantic omen tube passage;
5. after scaffold building completes, tissue engineering technique and peace matter personnel carry out safe mass examination;
In described step c, specifically comprise following steps:
1. in the building of scaffold, carry out setting up of template, first on the end face of headwall, fixedly mounting a plurality of transverse reinforcements supports, 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. after, along end wall surface, vertical supporting steel pipe is installed again, then between vertical supporting steel pipe, is fixedly mounted horizontal steel pipe pressure purlin, described steel pipe presses purlin to be pressed in template top, and between described steel pipe and template, clamping pine wood a tree, used in making timber for boats compresses template;
Described steps d specifically comprises following steps:
1. adopt mechanical hoisting funnel, funnel is transported to headwall and template top, funnel feed opening is aimed to gap between headwall and template and pour into a mould, described headwall wall body concrete divides builds for three times, and building is for the first time highly 3.5m on basic end face;
2. after treating first floor concrete setting, then build for the second time, build to lining arch top bit;
3. after treating second layer concrete setting, build for the third time, build to more than lining cutting vault and cap stone position;
4., after treating that headwall concrete solidifies completely, by template dismounting, complete building of headwall;
Described step e specifically comprises following steps:
1. at the headwall wall of building, reserve and connect a batch reinforcing bar in advance with it in stud, protruded length is specifically determined according to column thickness Different field;
2. model of the column is installed, the mode that described model of the column employing is drilled with hole for the expansion bolt and scaffold support at the headwall wall body of constructing is fixed, headwall model of the column adopts sizing punching block factory process to make, and form surfacing thickness is 3mm, and the back side adopts channel-section steel ribbing to support;
3., after treating that template fixedly mounts, carry out concreting;
4. treat after concrete setting well template and scaffold to remove, then carry out quality examination examination.
2. framed bent construction tunnel queen post portal method according to claim 1, is characterized in that: described 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, and the bar of sweeping the floor is apart from chock 0.2m, and inner side vertical rod is apart from 0.3m at the bottom of headwall.
3. framed bent construction tunnel queen post portal method according to claim 1, is characterized in that: the described headroom size of reserving vehicle passage and geomantic omen tube passage is respectively 4.8m*4.75m, 2.4m*3.0 m.
4. framed bent construction tunnel queen post portal method according to claim 1, is characterized in that: described headwall model of the column 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 pressure purlin, spacing 0.6m, and the mode that form joint consolidation process adopts double φ 48 steel pipes and the lumps of wood to support is reinforced.
CN201210173700.1A 2012-05-30 2012-05-30 Method for constructing distyle tunnel portal by framed bent Active CN102767378B (en)

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Publication number Priority date Publication date Assignee Title
CN103362523B (en) * 2013-07-22 2015-04-22 重庆巨能建设(集团)有限公司 Suspended formwork lining method for cover arch outside tunnel portal with weak surrounding rocks
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

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CN101818645A (en) * 2010-03-22 2010-09-01 中铁十二局集团第二工程有限公司 Construction method for newly increasing arched open cut tunnel at railway operating line tunnel portal
CN101781993B (en) * 2010-01-19 2012-05-23 中铁四局集团第二工程有限公司 Shield driving construction method for bearing water-rich soil layer

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KR100676914B1 (en) * 2006-06-13 2007-02-01 주식회사 무진네오테크 Excavating method of tunnel with slight vibration
JP2010053574A (en) * 2008-08-27 2010-03-11 Kajima Corp Construction method for tunnel entrance

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CN101781993B (en) * 2010-01-19 2012-05-23 中铁四局集团第二工程有限公司 Shield driving construction method for bearing water-rich soil layer
CN101818645A (en) * 2010-03-22 2010-09-01 中铁十二局集团第二工程有限公司 Construction method for newly increasing arched open cut tunnel at railway operating line tunnel portal

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