CN106677800A - Large tunnel variable cross-section concrete lining construction method - Google Patents

Large tunnel variable cross-section concrete lining construction method Download PDF

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Publication number
CN106677800A
CN106677800A CN201611192765.5A CN201611192765A CN106677800A CN 106677800 A CN106677800 A CN 106677800A CN 201611192765 A CN201611192765 A CN 201611192765A CN 106677800 A CN106677800 A CN 106677800A
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China
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truss
entablature
arc
column
concrete
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CN201611192765.5A
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Chinese (zh)
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CN106677800B (en
Inventor
雷建泉
郭联合
李刚
张静
冯亚娟
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中国水电建设集团十五工程局有限公司
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Publication of CN106677800A publication Critical patent/CN106677800A/en
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Publication of CN106677800B publication Critical patent/CN106677800B/en

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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

Abstract

A large tunnel variable cross-section concrete lining construction method comprises the following steps that 1, a clearance three-dimensional geometrical model is built; 2, end face trusses are machined; 3, the trusses are assembled; 4, combined steel formworks are laid on the upper surfaces of the trusses; 5, truss foot pads are welded; 6, the trusses are lifted; 7, a steel formwork trolley is arranged in place; 8, head blocking formworks are erected; 9, concrete is poured; and 10, formwork demounting is completed. According to the large tunnel variable cross-section concrete lining construction method, compared with traditional all-round frame construction methods, the construction period is shortened, the efficiency is improved, and the personnel and equipment cost are reduced; existing leftovers and waste shape steel on a construction site are utilized to be machined into dies, the cost is reduced, energy resources are saved, and the construction method is suitable for large water conveying tunnel and tunnel variable cross-section construction and especially suitable for engineering that the geological condition is poor and tunnel variable cross-section concrete lining needs to be conducted quickly.

Description

Large-scale tunnel variable cross-section section concrete- liner construction method

Technical field

The invention belongs to large-scale Tunnel excavation technical field, and in particular to a kind of large-scale tunnel variable cross-section section concrete lining Build construction method.

Background technology

Profiled template, i.e. circular formwork, it is extremely common in water-control project construction.Large-scale tunnel concrete- liner, typically Using customization telescoping steel form, chassis appearance and size is customized according to tunnel standard section.And tunnel inducer, conventional design is " side It is rounded " streamlined curved surface, to reduce the destruction of current frictional resistance and " cavitation erosion " phenomenon to concrete wall.

The pledge excavation of tunnel face after scar jetting cement and bolting and rope support, carries out tunnel layered driving into vertical surface, If geological condition is poor, led under in lower sleeping digging process, with the face of hole, free face is highly gradually increased, and basic part explosion is opened Disturbance is dug, rock texture unstability landslide and landslide phenomenon easily occurs, great threat is caused to construction safety, therefore, shorten each The convergence time of operation, completes variable cross-section section concrete support lining at the face of hole as early as possible, is safing key factor.

After the completion of top heading excavation, hole face free face is smaller, highly relatively low, dangerous relatively small, and at this moment hole is entered The mouth variable cross-section section curved surface reinforced completion colligation of crown, you can shorten the overall reinforcing bar colligation time.Hole is completed using telescoping steel form to enter Mouth variable cross-section section template and concrete construction, will greatly improve concrete efficiency of construction, cost-effective, reduce routine and set up full hall load-bearing Frame, tear the operations such as frame open in small space assembled formwork, it is time-consuming to greatest extent, it is to avoid landslide, it is ensured that construction safety, meaning It is great.

The content of the invention

The technical problems to be solved by the invention are to overcome the shortcomings of above-mentioned construction method, provide it is a kind of it is reasonable in design, Simple structure, improve concrete efficiency of construction, it is cost-effective, reduce it is conventional set up full hall bearing frame, in small space assembled formwork Tear operations such as frame, time-consuming to greatest extent open, it is to avoid landslide, it is ensured that the large-scale tunnel variable cross-section section concrete- liner of construction safety is applied Work method.

Solving the technical scheme of above-mentioned technical problem use is:Comprise the following steps:Step one, set up headroom three-dimensional geometry Model:According to the design size of tunnel, headroom 3-D geometric model is set up with mapping software, cut out telescoping steel form institute duty Between, the 3-D geometric model for needing to make position is obtained, cut each position section column;

Step 2, processing end face truss:A, setting-out utilization of area steel ruler draw circular arc line, the circular arc line is both sill Bottom surface curve, be also the top surface circular arc of telescoping steel form, and draw the position of column;

B, the size according to each portion of drawing three-dimensional geometrical model, difference column, entablature horizontal segment, entablature circular arc Section, each position blanking of sill;

C, tune arc is carried out to entablature arc section, sill according to the size of drawing three-dimensional geometrical model;

D, will it is complete after adjust arc after sill be placed on the corresponding curve location in setting-out place, lower honest material is sequentially placed first Column, then puts entablature horizontal segment, entablature arc section successively, column, entablature horizontal segment, entablature arc section, Each position of joints of sill carries out reinforcement of weld;

The size of e, the truss that respective numbers are made according to stake point quantity, each size of point truss and stake point cross section It is corresponding, the every symmetrical making two panels of truss;

Step 3, assembled truss:The monolithic truss that will be processed is put by stake dot sequency spaced horizontal, is then welded It is fixed, after completing side, the truss of symmetrical opposite side is set in aforementioned manners;

Combined steel formwork is laid in step 4, truss upper surface:After left and right two panels truss is machined, upper surface interval is laid Combined steel formwork, with iron wire that combined steel formwork and left and right two panels truss colligation is firm, small-radius arc position uses plank sheathing Lay;

Step 5, welded truss foot pad:In the corresponding position welded truss foot pad in telescoping steel form both sides;

Step 6, truss hoisting:With the truss of crane lifting side to telescoping steel form top, column lower end is set to be placed on steel In the corresponding truss foot pad of mould trolley, the installation of the truss of opposite side is completed using the above method;

Step 7, telescoping steel form are in place:After the completion of hole is dug, colligation side wall reinforcing bar and floor reinforcement, after pouring floor concrete, steel Mould trolley is voluntarily sailed into place;

Step 8, install stopper template:Annular top stopper template is reinforced using plank sheathing is assembled;

Step 9:Pour concrete:Control speed of perfusion, both sides symmetrically pour;

Step 10:Complete form removal:When concrete age design strength more than 80% is reached, telescoping steel form template, punching block are removed Chassis is rolled away from outside hole with truss, completes form removal.

First point truss of the invention includes column, entablature horizontal segment, sill, combined steel formwork, on sill Column is arranged at intervals with, column top is horizontally disposed entablature horizontal segment, and entablature horizontal segment is provided with combined steel formwork.

Point truss in second point truss~20th of the invention includes column, entablature horizontal segment, entablature circle Segmental arc, sill, combined steel formwork, are arranged at intervals with column on sill, column top is horizontally disposed entablature horizontal segment, Kiss smooth with entablature horizontal segment one end and outermost column top connects respectively at entablature arc section two ends, and entablature horizontal segment sets It is equipped with combined steel formwork.

Sill of the invention is circular arc I-steel, the sectional dimension phase of the central angle and arc length of circular arc and corresponding stake point Adapt to.

The length of entablature horizontal segment of the invention is adapted with the sectional dimension of corresponding stake point.

The height and spacing of column of the invention are adapted with the sectional dimension of corresponding stake point.

The central angle and arc length of entablature arc section of the invention are adapted with the sectional dimension of corresponding stake point.

The present invention has advantages below compared with prior art:

1st, compared with the full hall frame of tradition is constructed, the lifting of truss of the invention is reinforced and fulfiled ahead of schedule outside diversion tunnel, is not accounted for The straight line duration is used, shortened the duration, improved efficiency;

2nd, telescoping steel form is in place, installs stopper template, pour concrete, remove stopper template, telescoping steel form rolls away from outside hole and compares Duration required for full hall frame arrangement and method for construction is shorter;

3rd, compared with traditional full hall frame is constructed, personnel and equipment cost are reduced;Using the existing leftover bits and pieces in building site and useless Legacy steel processing model, cost-effective, energy saving.

4th, compared with the full hall frame arrangement and method for construction of tradition, the present invention is applied to large water delivery tunnel and tunnel variable cross-section is constructed, Especially geological condition is poor, need to be rapidly completed the engineering of tunnel variable cross-section section concrete- liner.

Brief description of the drawings

Fig. 1 is the structural representation of one embodiment of the invention.

Fig. 2 is the 4th structural representation of point truss 2 in Fig. 1.

Fig. 3 is first structural representation of point truss in Fig. 1.

In figure:1st, diversion tunnel section;2nd, the 4th point truss;3rd, telescoping steel form;2-1, column;2-2, combined steel formwork; 2-3, entablature arc section;2-4, sill;2-5, entablature horizontal segment.

Specific embodiment

The present invention is described in further details with reference to the accompanying drawings and examples, but is implemented the invention is not restricted to these Example.

Embodiment 1

In Fig. 1,2,3, large-scale tunnel variable cross-section section concrete- liner construction method of the invention is comprised the following steps:

Step one, set up headroom 3-D geometric model:According to the design size of tunnel, headroom three is set up with mapping software Dimension geometrical model, cuts out telescoping steel form and is taken up space, and obtains the 3-D geometric model for needing to make position, cuts each position section Column;

Step 2, processing section truss:Specific manufacturing process is illustrated by taking the 4th point truss 2 as an example, remaining each stake point purlin The manufacturing process of frame is identical;

A, setting-out utilization of area steel ruler draw circular arc line, the circular arc line is both the bottom surface curve of sill 2-4, is also steel The top surface circular arc of mould trolley 3, and draw the position of column 2-1;

B, the size according to each portion of drawing three-dimensional geometrical model, difference column 2-1, entablature horizontal segment 2-5, entablature Each position blanking of arc section 2-3, sill 2-4;

C, tune arc is carried out to entablature arc section 2-3, sill 2-4 according to the size of drawing three-dimensional geometrical model;According to The size in the corresponding section of each point is different, adjustment entablature arc section 2-3, the radian of sill 2-4 make its with it is corresponding The size in section is adapted;

D, will it is complete after adjust arc after sill 2-4 be placed on the corresponding curve location in setting-out place, it is lower good to be sequentially placed first The column 2-1 of material, then puts entablature horizontal segment 2-5, entablature arc section 2-3, column 2-1, entablature level successively Section 2-5, entablature arc section 2-3, each position of joints of sill 2-4 carry out reinforcement of weld;

The size of e, the truss that respective numbers are made according to stake point quantity, each size of point truss and stake point cross section It is corresponding, the every symmetrical making two panels of truss;

First point truss is made up of column 2-1, entablature horizontal segment 2-5, sill 2-4, combined steel formwork 2-2, under Reinforcement of weld is spaced on crossbeam column 2-1, and column 2-1 upper horizontals are provided with entablature horizontal segment 2-5, entablature horizontal segment Combined steel formwork 2-2 is laid with 2-5;Described sill 2-4 be circular arc I-steel, the central angle and arc length of circular arc with it is right The sectional dimension of stake point is answered to be adapted, the length of entablature horizontal segment 2-5 is adapted with the sectional dimension of corresponding stake point;Column 2- 1 height and spacing is adapted with the sectional dimension of corresponding stake point;

Second point truss~20th point truss includes column 2-1, entablature horizontal segment 2-5, entablature circular arc Section 2-3, sill 2-4, combined steel formwork 2-2, interval is welded with column 2-1 on sill 2-4, adjacent upright posts 2-1's Between the height of each column 2-1 determine that column 2-1 upper horizontals are welded with entablature according to the sectional dimension of correspondence stake point Horizontal segment 2-5, entablature arc section 2-3 two ends are smooth with entablature horizontal segment 2-5 one end and outermost heel post 2-1 tops respectively Kiss is connect, and combined steel formwork 2-2 is laid with entablature horizontal segment 2-5;Described sill 2-4 is circular arc I-steel, circular arc Central angle and the sectional dimension of arc length and corresponding stake point be adapted, the length of entablature horizontal segment 2-5 and corresponding stake point section Face size is adapted;The height and spacing of column 2-1 are adapted with the sectional dimension of corresponding stake point;Entablature arc section 2-3's Central angle and arc length are adapted with the sectional dimension of corresponding stake point;

Step 3, assembled truss:The monolithic truss that will be processed is put by stake dot sequency interval 0.75m levels, specifically The size of space is determined according to actual cross-sectional dimensions, is then welded and fixed, and after completing side, it is right to set in aforementioned manners Claim the truss of opposite side;

Combined steel formwork is laid in step 4, truss upper surface:After left and right two panels truss is machined, upper surface interval 1.5m Lay combined steel formwork, the specific size of space is determined according to actual cross-sectional dimensions, with iron wire by combined steel formwork with left and right The colligation of two panels truss firmly, using plank sheathing laid by small-radius arc position;

Step 5, welded truss foot pad:3 truss foots pad are respectively welded at the corresponding position in the both sides of telescoping steel form 3;Truss pin Pad, using channel-section steel processing, is highly 0.1m, and the channel-section steel one end and the side circular arc of telescoping steel form 3 for making cutting coincide.

Step 6, truss hoisting:With the truss of crane lifting side to the top of telescoping steel form 3, it is placed on column lower end In the corresponding truss foot pad of telescoping steel form 3, the installation of the truss of opposite side is completed using the above method;Integrally add after the completion of lifting Gu welding, repairs and lay truss surface incompleteness position, carrying out check makes surface smoothness meet code requirement;

Step 7, telescoping steel form 3 are in place:After the completion of hole is dug, colligation side wall reinforcing bar and floor reinforcement, after pouring floor concrete, Telescoping steel form 3 is voluntarily sailed into place;

Step 8, install stopper template:Annular top stopper template is reinforced using plank sheathing is assembled;

Step 9:Pour concrete:Control speed of perfusion, both sides symmetrically pour;

Step 10:Complete form removal:When concrete age design strength more than 80% is reached, telescoping steel form template, punching block are removed Chassis is rolled away from outside hole with truss, completes form removal.

The above, is only presently preferred embodiments of the present invention, and any limitation is not done to the present invention, every according to the present invention Any simple modification, change and equivalent structure transformation that technical spirit is made to above example, still fall within skill of the present invention The protection domain of art scheme.

Claims (7)

1. a kind of large-scale tunnel variable cross-section section concrete- liner construction method, it is characterised in that comprise the following steps:
Step one, set up headroom 3-D geometric model:According to the design size of tunnel, headroom three-dimensional is set up with mapping software several What model, cuts out telescoping steel form and is taken up space, and obtains the 3-D geometric model for needing to make position, cuts each position section and stands Post;
Step 2, processing end face truss:A, setting-out utilization of area steel ruler draw circular arc line, the circular arc line is both the bottom of sill Surface curve, is also the top surface circular arc of telescoping steel form, and draws the position of column;
B, the size according to each portion of drawing three-dimensional geometrical model, respectively column, entablature horizontal segment, entablature arc section, under Each position blanking of crossbeam;
C, tune arc is carried out to entablature arc section, sill according to the size of drawing three-dimensional geometrical model;
D, will it is complete after adjust arc after sill be placed on the corresponding curve location in setting-out place, the vertical of lower honest material is sequentially placed first Post, then puts entablature horizontal segment, entablature arc section successively, column, entablature horizontal segment, entablature arc section, under Each position of joints of crossbeam carries out reinforcement of weld;
E, the truss that respective numbers are made according to stake point quantity, each size of point truss are relative with the size of stake point cross section Should, the every symmetrical making two panels of truss;
Step 3, assembled truss:The monolithic truss that will be processed is put by stake dot sequency spaced horizontal, then carries out welding solid It is fixed, after completing side, the truss of symmetrical opposite side is set in aforementioned manners;
Combined steel formwork is laid in step 4, truss upper surface:After left and right two panels truss is machined, combination is laid at upper surface interval Steel form, with iron wire that combined steel formwork and left and right two panels truss colligation is firm, small-radius arc position is laid using plank sheathing;
Step 5, welded truss foot pad:In the corresponding position welded truss foot pad in telescoping steel form both sides;
Step 6, truss hoisting:With the truss of crane lifting side to telescoping steel form top, column lower end is set to be placed on punching block platform In the corresponding truss foot pad of car, the installation of the truss of opposite side is completed using the above method;
Step 7, telescoping steel form are in place:After the completion of hole is dug, colligation side wall reinforcing bar and floor reinforcement, after pouring floor concrete, punching block platform Car is voluntarily sailed into place;
Step 8, install stopper template:Annular top stopper template is reinforced using plank sheathing is assembled;
Step 9:Pour concrete:Control speed of perfusion, both sides symmetrically pour;
Step 10:Complete form removal:When concrete age design strength more than 80% is reached, telescoping steel form template, telescoping steel form are removed Rolled away from outside hole with truss, complete form removal.
2. large-scale tunnel variable cross-section section concrete- liner construction method according to claim 1, it is characterised in that:Described first Stake point truss includes column, entablature horizontal segment, sill, combined steel formwork, and column, column top are arranged at intervals with sill End is horizontally disposed entablature horizontal segment, and entablature horizontal segment is provided with combined steel formwork.
3. large-scale tunnel variable cross-section section concrete- liner construction method according to claim 1, it is characterised in that:Described second Stake point truss~20th point truss includes column, entablature horizontal segment, entablature arc section, sill, combined steel Plate, is arranged at intervals with column on sill, column top is horizontally disposed entablature horizontal segment, entablature arc section two ends difference Kiss smooth with entablature horizontal segment one end and outermost column top connects, and entablature horizontal segment is provided with combined steel formwork.
4. large-scale tunnel variable cross-section section concrete- liner construction method according to Claims 2 or 3, it is characterised in that:Described Sill is circular arc I-steel, and the central angle and arc length of circular arc are adapted with the sectional dimension of corresponding stake point.
5. large-scale tunnel variable cross-section section concrete- liner construction method according to claim 4, it is characterised in that:Described upper horizontal stroke The length of beam horizontal segment is adapted with the sectional dimension of corresponding stake point.
6. large-scale tunnel variable cross-section section concrete- liner construction method according to claim 5, it is characterised in that:Described column Height and the sectional dimension of spacing and corresponding stake point be adapted.
7. large-scale tunnel variable cross-section section concrete- liner construction method according to claim 3, it is characterised in that:Described upper horizontal stroke The central angle and arc length of beam arc section are adapted with the sectional dimension of corresponding stake point.
CN201611192765.5A 2016-12-21 2016-12-21 Large-scale tunnel variable cross-section section concrete- liner construction method CN106677800B (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109736316A (en) * 2019-01-14 2019-05-10 中水电第十一工程局(郑州)有限公司 A kind of tailrace tunnel bend loss telescoping steel form concrete- liner construction method

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CN103161126A (en) * 2013-04-11 2013-06-19 新疆北新路桥集团股份有限公司 Road bridge variable section hollow high pier slip-form construction method
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Publication number Priority date Publication date Assignee Title
CN109736316A (en) * 2019-01-14 2019-05-10 中水电第十一工程局(郑州)有限公司 A kind of tailrace tunnel bend loss telescoping steel form concrete- liner construction method

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