CN105673045A - Large reverse slop and small cross-section tunnel double chassis direct connection lining construction method - Google Patents
Large reverse slop and small cross-section tunnel double chassis direct connection lining construction method Download PDFInfo
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- CN105673045A CN105673045A CN201511011575.4A CN201511011575A CN105673045A CN 105673045 A CN105673045 A CN 105673045A CN 201511011575 A CN201511011575 A CN 201511011575A CN 105673045 A CN105673045 A CN 105673045A
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- 238000010276 construction Methods 0.000 title claims abstract description 83
- 238000005266 casting Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 62
- 230000009977 dual effect Effects 0.000 claims description 23
- 238000005086 pumping Methods 0.000 claims description 18
- 238000012857 repacking Methods 0.000 claims description 9
- 230000001965 increasing effect Effects 0.000 claims description 8
- 238000009412 basement excavation Methods 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000007373 indentation Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000007569 slipcasting Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004886 process control Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a tunnel construction method, and in particular to a large reverse slop and small cross-section tunnel double chassis direct connection lining construction method. The purpose of the invention is to lower pump concrete loss rate, accelerate lining construction pace, and lower lining construction difficulty in large reverse slop and small cross-section tunnel double chassis construction. The method of the invention includes: refitting two lining chassis; separately adding a lining chassis lengthened panel to the front end and the back end of the two lining chassis; performing seamless connection between the two lining chassis through the lengthened panels and anti-leakage and self-adhesive rubber belts; when direct connection lining construction is in progress, adopting tilt layer casting method in concrete casting, advancing from the outermost row casting window I at the back end of the No.2 lining chassis to the innermost row casting window II at the front end of the No.1 lining chassis; at the same time, alternating construction symmetrically on the left side and right side of the longitudinal center line of the two lining chassis panels; finally demoulding, which completes a lining cycle. The method of the invention lowers pump concrete loss rate, accelerates lining construction pace, lowers lining construction difficulty, and guarantees construction quality in large reverse slop and small cross-section tunnel double trolley construction.
Description
Technical field
The present invention relates to a kind of method for tunnel construction, be specially a kind of big counter-slope narrow-bore tunnel dual stage car direct connection lining construction method.
Background technology
Current big cross section double-coil output or multilane highway lining-building platform car for tunnel construction length mostly are 12m, 10.5m or 9m, and under general lining trolley, space is available for construction machinery vehicle and passes through. Light section single-track railway tunnel or service gallery lining trolley length mostly are 9m or 7.5m and insufficient space under general chassis, and Construction traffic can not pass through.
Lining trolley is too short to be had the disadvantage that:
1, the tunnel-liner plate number of equal length will increase, and corresponding stopper template erects number of times, lining cutting overlap joint number of times, concreting number of times, solidifying soil builds interval times also will increase, and reduce construction speed;
2, stopper template and the concrete proportion of goods damageds are added;
Lining trolley is long to be had the disadvantage that:
1, unfavorable lining trolley is assembled, walk, chassis panel positions, and voltage regulator tube difficulty strengthens;
2, it is unfavorable for concreting;
3, construction joint space strengthens, and concrete heating problem is also more serious, causes the increased risk that lining concrete occurs;
If 4 in the middle of easement curve or circular curve tunnel, lining cutting is less useful for line type control, in the middle of vertical curve, is unfavorable for high process control.
Therefore, at present in long distance tunnel lining construction, for accelerating construction progress, two lining trolleys constructions of many uses are (for difference, by No. 1 lining trolley of front end chassis called after, rear end chassis is No. 2 lining trolleys), concrete pump closelys follow chassis, one in front and one in back at a distance of several adjoining rocks, without using an overlength lining trolley. Can crossing car under large cross-section tunnel lining trolley, the spacing of No. 1 lining trolley and No. 2 lining trolleys can strengthen as far as possible, and the spacing strengthening chassis has the advantage that
1, to reduce construction interference;
2, minimizing is newly opened lining cutting both sides and is both needed to erect the number of times of stopper template, and No. 2 lining trolley one end overlap with the lining concrete watered, and the other end erects stopper template, and No. 1 lining trolley is newly opened lining cutting both sides and need to be erected stopper template (as shown in Figure 1, 2);
3, lining cutting back cavity slip casting number of times is reduced, because rear a left a blank hole of plate lining cutting observation port can be filled up by previous plate lining cutting, the cavity of No. 2 last plate lining cutting of lining trolley and No. 1 lining trolley the first plate lining joint position then needs slip casting (as shown in Figure 3);
But for narrow-bore tunnel because car can not be crossed under lining trolley, concrete pump can only closely follow No. 2 lining trolleys, and very long pump line during No. 1 lining trolley casting concrete, need to be connected, pumping difficulty strengthens, concrete loss strengthens (as shown in Figure 4), therefore, the spacing of two lining trolleys can not be too big, and the advantage of the spacing of the above-mentioned increasing chassis of dual stage car lining construction can not be not fully exerted. Especially at big reverse-slope tunnel, concrete pumping difficulty strengthens further, and various construction difficult problems will be more prominent.
Therefore, research one reduces the dual stage car construction pump concrete proportion of goods damageds, accelerates lining construction progress, reduces lining construction difficulty, and the construction method being suitable for big anti-broken narrow-bore tunnel dual stage car lining cutting seems very necessary.
Summary of the invention
The present invention is to reduce the big counter-slope narrow-bore tunnel dual stage car construction pump concrete proportion of goods damageds, accelerating lining construction progress, reduce lining construction difficulty and provide a kind of big counter-slope narrow-bore tunnel dual stage car direct connection lining construction method.
The present invention is achieved by the following technical solutions: a kind of big counter-slope narrow-bore tunnel dual stage car direct connection lining construction method, comprises the following steps:
Step one, lining trolley are reequiped
(1) No. 2 lining trolley repacking
No. 2 lining trolley front end work platformses are removed by 1.1, make No. 2 lining trolley front end frameworks and No. 2 lining trolley panels be in same perpendicular;
1.2 move within lining trolley skeleton after No. 2 lining trolley front end running motors and travelling wheel, make No. 2 lining trolley front ends smooth;
No. 2 lining trolley lining front edge of board increasings are connect No. 2 lining trolleys by 1.3 lengthens panels, circumferentially direction reinforces with angle bar every 1 meter, window I is built along what its longitudinal centre line symmetry offered that some rows be arranged in parallel in No. 2 lining trolley lining cutting panel both sides, and on longitudinal centre line, three push pipe pumping holes I are laid at interval;
(2) No. 1 lining trolley repackings
No. 1 lining trolley rear end work platforms is removed by 2.1, makes No. 1 lining trolley rear end skeleton and No. 1 lining trolley panel be in same perpendicular;
No. 1 lining trolley rear end running motor and travelling wheel are moved forward within lining trolley skeleton by 2.2, make No. 1 lining trolley rear end smooth;
No. 1 lining trolley lining cutting panel rear end increasing is connect No. 1 lining trolley by 2.3 lengthens panel, circumferentially direction reinforces with angle bar every 1 meter, No. 1 lining trolley lengthens panel radius less than former lining cutting panel radius, No. 1 lining trolley lengthens panel length and lengthens panel length less than No. 2 lining trolleys, window II is built along what its longitudinal centre line symmetry offered that some rows be arranged in parallel in No. 1 lining trolley lining cutting panel both sides, on longitudinal centre line, three push pipe pumping holes II are laid at interval, often row builds the window I of building of relevant position on window II and No. 2 lining trolley lining cutting panels and is linked as a row,
(3) leakproof self-adhering rubber band processing
3.1 leakproof self-adhering rubber bands expand into strip rectangular structure, tape thickness lengthens the difference of panel radius and former lining cutting panel radius equal to No. 1 lining trolley, width lengthens the length of panel equal to No. 1 lining trolley, length is more than lining trolley panel hoop length, to reserve lap segment length, leakproof self-adhering rubber band lower surface has adhered layer, upper surface to offer the joint-cutting of crisscross setting, and the joint-cutting degree of depth is to lengthen plate thickness 1cm more than No. 2 lining trolleys;
Leakproof self-adhering rubber band is affixed on No. 1 lining trolley by 3.2 to be lengthened on panel;
Step 2, direct connection lining construction
(1) preparation
After in tunnel, excavation and support has worked, lay geotextiles and splash guard, again bar-mat reinforcement and drain pipe be installed, various built-in fittings or be fixed on lining trolley or be fixed on reinforced mesh, setting-out goes out tunnel center line more afterwards, if curved tunnel, then tunnel center line becomes broken line by lining trolley length setting-out, re-lays traveling rail afterwards, prepares lining trolley location;
(2) lining trolley location
First No. 1 lining trolley is moved ahead by 2.1, and the distance that moves ahead is with more than No. 1 lining trolley length 0.5m;
No. 2 lining trolley travelings are put in place by 2.2, rise lining cutting panel jack, make lining cutting panel absolute altitude put in place after centering, and reinflated side form is fixed with screw mandrel after putting in place, complete No. 2 lining trolley location;
No. 1 lining trolley is fallen back by 2.3, make No. 1 lining trolley lengthen panel and No. 2 lining trolleys lengthen panel lap, afterwards by No. 1 lining trolley centering, rise lining cutting panel jack, the joint-cutting making leakproof self-adhering rubber band holds out against No. 2 lining trolleys and lengthens lower panels, and along stitching indentation compressive state, being uncompressed part, lengthen panels, No. 1 lining trolley panel with No. 2 lining trolleys concordant, launch No. 1 lining trolley side template, fix with screw mandrel after putting in place, waterstop and stopper template are finally installed again, complete the overlap joint of No. 1 lining trolley and No. 2 lining trolleys;
(3) concreting
Concreting adopts oblique layer casting method, concrete casting method is: builds window I from No. 2 lining trolley rear end outermost rows and builds window II propelling to No. 1 interior row in lining trolley front end, simultaneously along the alternately construction of two lining trolley panel longitudinal centre line left and right sides symmetries, for the every side of longitudinal centre line multiple rows of build window build time, being built window by interior row to build window to outermost row and build and build track in the oblique grade line of multilamellar that extends forward, the gradient of every layer of oblique grade line not can exceed that 10O, outermost row builds window rear end and interior row to build the track of building of window front end be straightway;
(4) demoulding
After concreting, after concrete initial set, start to remove from the bottom up stopper mould, after concrete final set and reaching dismountable bearing form intensity, unscrew screw mandrel, first pack up No. 1 lining trolley side form, fall No. 1 lining trolley panel jack, then No. 1 lining trolley moves ahead, then according to said sequence makes No. 2 lining trolley demouldings;
One lining cutting has circulated, and just can position successively, spread rail, carries out subsequent cycle construction.
Preferably, in above-mentioned steps (3), when alternately building along two lining trolley panel longitudinal centre line left and right sides symmetries, when left side first row build window build maximum height reach 1.5m time, change to right side first row and build window, when right side first row build window build highly reach 3m time, then build window from this side second row and start to build, so move in circles, complete all concrete pouring constructions building window. This builds mode in order to keep lining trolley not by too big biasing force, it is ensured that extruding force balance suffered by chassis both sides.
Preferably, the length of No. 2 lining trolley lengthening panels is 20cm, and the length of No. 1 lining trolley lengthening panel is 10cm, and No. 1 lining trolley lengthens panel radius less than former lining cutting panel radius 5cm.
Preferably, the thickness of leakproof self-adhering rubber band is 5cm, and width is 10cm.
Preferably, when concreting to push pipe, build according to the direction advanced from lining trolley rear end forward end, first carried out push pipe by three push pipe pumping holes I at No. 2 lining trolley tops one by one to build, carried out push pipe by three push pipe pumping holes II at No. 1 lining trolley top one by one again to build, in order that first fill up the observation cavity that a mould stays, finally leave cavity in this observation port position, lining cutting stopper mould place.
Preferably, after the demoulding, check leakproof self-adhering rubber band, because the joint-cutting degree of depth lengthens plate thickness 1cm more than No. 2 lining trolleys, if resilient after the demoulding, after being cleaned out by mortar between joint-cutting, namely can be used for subsequent cycle construction; According to field observation, if cannot restoring to the original state after the demoulding and spillage phenomenon occurring, then need to change rubber strip, during replacing, the leakproof self-adhering rubber band that only need to tear old, sticks new leakproof self-adhering rubber band.
Compared with prior art, present invention, avoiding the shortcoming that chassis is too short and chassis is long, have the advantage that
1, two lining trolleys are reequiped, increase in the front-end and back-end of two lining trolleys respectively and connect lining trolley lengthening panel, two lining trolleys carry out seamless overlap joint by lengthening panel and leakproof self-adhering rubber band, avoid concrete from slab joint seepage, also ensure normally to overlap when lining trolley location exists construction error, occur without faulting of slab ends, it is ensured that lining construction quality;
2, two organic connecting together of lining trolley are carried out lining construction, assembly, location conveniently, accurately, easily operate, and decreasing construction and disturbing, minimizing is newly opened lining cutting both sides and is both needed to erect the number of times of stopper template and reduces lining cutting back cavity slip casting number of times, accelerates lining construction progress;
3, oblique layer casting method is adopted during concreting, build window I from No. 2 lining trolley rear end outermost rows and build window II propelling to No. 1 interior row in lining trolley front end, keep certain gradient, to adapt to tunnel counter-slope, simultaneously along the alternately construction of two lining trolley panel longitudinal centre line left and right sides symmetries, keep lining trolley not by too big biasing force, and decrease and change pipe number of times, it is particularly suited for big reverse-slope tunnel so that concrete pumping difficulty is substantially reduced;
4, because every circulation lining cutting is built length and added 1 times, therefore the tunnel-liner plate number of equal length will reduce, and corresponding stopper template erects number of times, lining cutting overlap joint number of times, concreting number of times, solidifying soil are built interval times and also will be reduced, and accelerates construction speed;
5, because Mo Jiali number of stopper reduces, therefore decrease the proportion of goods damageds of stopper template, build several minimizing, reduce pump line wash number and concrete opening quotation number of times, therefore reduce the concrete proportion of goods damageds;
6, compared to a long chassis, the favourable lining trolley of dual stage car direct connection is assembled, walking, is conducive to chassis panel to position, advantageously reduces voltage regulator tube number of times;
If 7 in the middle of easement curve or circular curve tunnel, compared to a long chassis, two chassis position in the plane and closer to curve, can be conducive to line type control, in the middle of vertical curve, are then conducive to high process control;
In a word, lining construction method of the present invention is substantially reduced the big counter-slope narrow-bore tunnel dual stage car construction pump concrete proportion of goods damageds, accelerates lining construction progress, reduces lining construction difficulty, it is ensured that construction quality, has good application value.
Accompanying drawing explanation
Fig. 1 is original two lining trolley constructing structure schematic diagrams in background technology;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is original lining trolley observation port and pump line schematic diagram in background technology;
Fig. 4 is concrete pumping schematic diagram in narrow-bore tunnel in background technology;
Fig. 5 is schematic diagram before No. 2 lining trolley work platforms repackings;
Fig. 6 is schematic diagram after No. 2 lining trolley work platforms repackings;
Fig. 7 is travelling wheel repacking schematic diagram;
Fig. 8 is that No. 2 lining trolleys lengthen panel sectional view;
Fig. 9 is that No. 1 lining trolley lengthens panel sectional view;
Figure 10 is leakproof self-adhering rubber band schematic diagram;
Figure 11 is tunnel curved section central line lofting schematic diagram;
Figure 12 is Plane Curved line segment dual stage car direct connection plane graph;
Figure 13 is No. 1 lining trolley and No. 2 vertical face figure in lining trolley direct connection top;
Figure 14 is No. 1 lining trolley and No. 2 lining trolley direct connection overlap joint detail drawings;
Figure 15 is that lining trolley panel launches window number figure;
Figure 16 is that double lining chassis panel launches to build window track figure;
Figure 17 is dual stage car direct connection lining construction schematic diagram;
In figure: 1-2 lining trolley; 2-2 lining trolley front end work platforms; 3-2 lining trolley panel; 4-running motor; 5-travelling wheel; 6-2 lining trolley lengthens panel; 7-angle bar; 8-builds window I; 9-push pipe pumping hole I; 10-1 lining trolley; 11-1 lining trolley rear end work platforms; 12-1 lining trolley panel; 13-1 lining trolley lengthens panel; 14-builds window II; 15-push pipe pumping hole II; 16-leakproof self-adhering rubber band; 17-joint-cutting; The oblique grade line of 18-multilamellar; 19-straightway; 20-excavation contour line; 21-lining trolley panel; 22-stopper template; 23-has built section concrete; Cavity, the 24-section of building observation port position; The 25-newly section of building observation port is intended leaving a blank hole; 26-pump line; 27-concrete pump; 28-tunnel center line; 29-curved tunnel profile; 30-1 lining trolley launches panel; 31-2 lining trolley launches panel; 32-2 lining trolley panel lengthens district; 34-lining construction direction; 35-2 lining trolley rear end work platforms.
Detailed description of the invention
Big counter-slope narrow-bore tunnel dual stage car direct connection lining construction method, comprises the following steps:
Step one, lining trolley are reequiped
(1) No. 2 lining trolley 1 is reequiped
No. 2 lining trolley front end work platformses 2 are removed by 1.1, making No. 2 lining trolley front end frameworks and No. 2 lining trolley panels 3 be in same perpendicular, Fig. 5 is that front schematic diagram reequiped by lining trolley work platforms, Fig. 6 is schematic diagram after No. 2 lining trolley front end work platformses repackings;
1.2 move within lining trolley skeleton after No. 2 lining trolley front end running motors 4 and travelling wheel 5, make No. 2 lining trolley front ends smooth, are illustrated in figure 7 walking motor and travelling wheel repacking schematic diagram;
No. 2 lining trolley lining front edge of board increasings are connect No. 2 lining trolleys by 1.3 lengthens panels 6, length is 20cm, circumferentially direction reinforces with angle bar 7 every 1 meter, as shown in Figure 8, window I 8 is built along what its longitudinal centre line symmetry offered that 3 rows be arranged in parallel in No. 2 lining trolley lining cutting panel both sides, on longitudinal centre line, three push pipe pumping holes I 9 are laid at interval, and as shown in figure 15, lining trolley panel launches to build window number figure;
(2) No. 1 lining trolleys 10 are reequiped
No. 1 lining trolley rear end work platforms 11 is removed by 2.1, makes No. 1 lining trolley rear end skeleton and No. 1 lining trolley panel 12 be in same perpendicular;
No. 1 lining trolley rear end running motor and travelling wheel are moved forward within lining trolley skeleton by 2.2, make No. 1 lining trolley rear end smooth;
No. 1 lining trolley lining cutting panel rear end increasing is connect No. 1 lining trolley by 2.3 lengthens panel 13, length is 10cm, circumferentially direction reinforces with angle bar every 1 meter, No. 1 lining trolley lengthens panel radius less than former lining cutting panel radius 5cm, as shown in Figure 9, No. 1 lining trolley lengthens panel length and lengthens panel length less than No. 2 lining trolleys, window II 14 is built along what its longitudinal centre line symmetry offered that three rows be arranged in parallel in No. 1 lining trolley lining cutting panel both sides, on longitudinal centre line, three push pipe pumping holes II 15 are laid at interval, often row builds the window I of building of relevant position on window II and No. 2 lining trolley lining cutting panels and is linked as a row, as shown in figure 15, lining trolley panel launches to build window number figure,
(3) leakproof self-adhering rubber band 16 is processed
3.1 leakproof self-adhering rubber bands expand into strip rectangular structure, as shown in Figure 10, tape thickness lengthens the difference of panel radius and former lining cutting panel radius equal to No. 1 lining trolley, for 5cm, width lengthens the length of panel equal to No. 1 lining trolley, for 10cm, length is more than lining trolley panel hoop length, to reserve lap segment length, leakproof self-adhering rubber band lower surface has adhered layer, upper surface offers the joint-cutting 17 of crisscross setting, and the joint-cutting degree of depth is to lengthen plate thickness 1cm more than No. 2 lining trolleys;
Leakproof self-adhering rubber band is affixed on No. 1 lining trolley by 3.2 to be lengthened on panel;
Step 2, direct connection lining construction
(1) preparation
After in tunnel, excavation and support has worked, lay geotextiles and splash guard, again bar-mat reinforcement and drain pipe be installed, various built-in fittings or be fixed on lining trolley or be fixed on reinforced mesh, setting-out goes out tunnel center line more afterwards, if curved tunnel, then tunnel center line becomes broken line (as shown in figure 11) by lining trolley length setting-out, re-lays traveling rail afterwards, prepares lining trolley location;
(2) lining trolley location
First No. 1 lining trolley is moved ahead by 2.1, and the distance that moves ahead is more than No. 1 lining trolley length 0.5m, to facilitate observer to observe No. 2 lining trolley positioning scenarios in No. 1 lining trolley;
No. 2 lining trolley travelings are put in place by 2.2, rise lining cutting panel jack, make lining cutting panel absolute altitude put in place after centering, and reinflated side form is fixed with screw mandrel after putting in place, complete No. 2 lining trolley location, and No. 2 lining trolley location are the same with normal separate unit car location;
No. 1 lining trolley is fallen back by 2.3, make No. 1 lining trolley lengthen panel and No. 2 lining trolleys lengthen panel lap, afterwards by No. 1 lining trolley centering, rise lining cutting panel jack, the joint-cutting making leakproof self-adhering rubber band holds out against No. 2 lining trolleys and lengthens lower panels, and along stitching indentation compressive state, it is uncompressed part and lengthens panel with No. 2 lining trolleys, No. 1 lining trolley panel is concordant, ensure that concrete is not from slab joint seepage, also ensure normally to overlap when lining trolley location exists error, occur without faulting of slab ends (see Figure 12, Figure 13, Figure 14), launch No. 1 lining trolley side template, fix with screw mandrel after putting in place, waterstop and stopper template are finally installed again, complete the overlap joint of No. 1 lining trolley and No. 2 lining trolleys, according to as shown in figure 17, carrying out dual stage car direct connection lining construction.
(3) concreting
Concreting prepares: coordinating ready-mixed concrete by anti-crack concrete, cracking resistance mix-design has been mature technology at present, does not repeat them here, installs concrete pump, connect pump line, first pump into water, wet channels, pump into mortar again, lubrication piping, afterwards just can formal casting concrete.
Concreting adopts oblique layer casting method, to increase area of dissipation, concrete casting method is: builds window I from No. 2 lining trolley rear end outermost rows and builds window II propelling to No. 1 interior row in lining trolley front end, propelling to cover in time, simultaneously along the alternately construction of two lining trolley panel longitudinal centre line left and right sides symmetries, for the every side of longitudinal centre line multiple rows of build window build time, built window by interior row to build window build to outermost row, and build track in the oblique grade line 18 of multilamellar extended forward, the gradient of every layer of oblique grade line not can exceed that 10O, otherwise easily make concrete excess flow that aggregate separated occurs when vibrating, outermost row builds window rear end and interior row to build the track of building of window front end be straightway 19; In above-mentioned steps (3), when alternately building along two lining trolley panel longitudinal centre line left and right sides symmetries, when left side first row build window build maximum height reach 1.5m time, replacing to right side first row builds window, when right side first row build window build highly reach 3m time, build window from this side second row again to start to build, when right side second row build window build maximum height reach 1.5m time, change to left side the 3rd to arrange and build window, so move in circles, complete all concrete pouring constructions building window. When concreting to push pipe, build according to the direction advanced from lining trolley rear end forward end, first carried out push pipe by three push pipe pumping holes I (in Figure 15, sequence number is 50,70,90) at No. 2 lining trolley tops one by one to build, then carried out push pipe by three push pipe pumping holes II (in Figure 15, sequence number is 120,140,160) at No. 1 lining trolley top one by one and build. The order of building specifically building window illustrates in conjunction with Figure 15, and order is as follows:
Build the track sequentially formed and see Figure 16;
(4) demoulding
After concreting, after concrete initial set, starting to remove from the bottom up stopper mould, now concrete is also not up to final set strength, now removes stopper mould and can facilitate dabbing, after concrete final set and reaching dismountable bearing form intensity, unscrew screw mandrel, first pack up No. 1 lining trolley side form, fall No. 1 lining trolley panel jack, then No. 1 lining trolley moves ahead, then according to said sequence makes No. 2 lining trolley demouldings;
(5) leakproof self-adhering rubber band is changed
After the demoulding, after checking the demoulding, check leakproof self-adhering rubber band, because the joint-cutting degree of depth lengthens plate thickness 1cm more than No. 2 lining trolleys, if resilient after the demoulding, after being cleaned out by mortar between joint-cutting, namely can be used for subsequent cycle construction; According to field observation, if cannot restoring to the original state after the demoulding and spillage phenomenon occurring, then need to change rubber strip, during replacing, the leakproof self-adhering rubber band that only need to tear old, sticks new leakproof self-adhering rubber band.
So far, a lining cutting has circulated, and just can position successively, spread rail, carries out subsequent cycle construction.
In order to prove the advance of construction method of the present invention, practicality further, applicant enumerates following case history and illustrates:
Project profile:
It is Shanxi Province's " two vertical ten is horizontal " big network of rivers "backbone" projects that Shanxi Province's Xiao Langdi draws yellow engineering, being positioned at Yuncheng, north, according to Luliang Mountains, borders on Linfen, Zhongtiao Shan Mountain is stood erect in east and Jincheng City adjoins, and west, south and Shaanxi Province's Weinan City, Henan Province's Sanmenxia City are faced each other every the Yellow River.Engineering Overall tendency is the southeast-north-westward, it it is the large-scale water diversion project to the river valley water transfer of the Sushui River, Shanxi Province of the Xiaolangdi Hydro Project on the Yellow River mainstream, diversion main line originates in the Xiaolangdi Reservoir of river mouth, domestic Ban Jian river, Yuanqu County right bank, terminate at the Lv Zhuan reservoir that Wenxi County is domestic, the total trend of circuit is the southeast-north-westward, total length 59.6km. The Xiao Langdi undertaken the construction of by applicant draws yellow engineering construction III mark in Yuncheng Yuanqu County, this bid section tunnel overall length 11.908km, and for new tunnel excavation, design longitudinal gradient 1/3000, wherein 2# tunnel pile No. is 8+113～11+210 section design discharge 20.0m3/ s, 13+957～20+250 section design discharge 16.25m3/ s, long 9.39km, Yuanqu branch line pile No. Y0+000～2+518 section design discharge 3.94m3/ s, long 2.518km, have tri-working tunnel of 3#, 4#, 5# in pipeline section.
This big counter-slope narrow-bore tunnel, for large cross-section tunnel, adopts the construction of original lining methods to there is such as machinery because rapid construction, photoface exploision slotting can not cannot not easily create the problems such as effective freeing surface by lining trolley. Adopt dual stage car direct connection lining construction method of the present invention, it is substantially reduced the big counter-slope narrow-bore tunnel dual stage car construction pump concrete proportion of goods damageds, accelerate lining construction progress, reduce lining construction difficulty, ensure that construction quality, dual stage car direct connection lining construction draws yellow engineering tunnel at Xiao Langdi and succeeds application, has good application value.
Claims (6)
1. a big counter-slope narrow-bore tunnel dual stage car direct connection lining construction method, is characterized in that comprising the following steps:
Step one, lining trolley are reequiped
(1) No. 2 lining trolley (1) repacking
No. 2 lining trolley front ends work platforms (2) are removed by 1.1, make No. 2 lining trolley front end frameworks and No. 2 lining trolley panels (3) be in same perpendicular;
No. 2 lining trolley front ends running motor (4) and travelling wheel (5) are moved within lining trolley skeleton by 1.2 afterwards, make No. 2 lining trolley front ends smooth;
No. 2 lining trolley lining front edge of board increasings are connect No. 2 lining trolleys by 1.3 lengthens panel (6), circumferentially direction reinforces with angle bar (7) every 1 meter, window I (8) is built along what its longitudinal centre line symmetry offered that some rows be arranged in parallel in No. 2 lining trolley lining cutting panel both sides, and on longitudinal centre line, three push pipe pumping holes I (9) are laid at interval;
(2) No. 1 lining trolley (10) repackings
No. 1 lining trolley rear end work platforms (11) is removed by 2.1, makes No. 1 lining trolley rear end skeleton and No. 1 lining trolley panel (12) be in same perpendicular;
No. 1 lining trolley rear end running motor and travelling wheel are moved forward within lining trolley skeleton by 2.2, make No. 1 lining trolley rear end smooth;
No. 1 lining trolley lining cutting panel rear end increasing is connect No. 1 lining trolley by 2.3 lengthens panel (13), circumferentially direction reinforces with angle bar every 1 meter, No. 1 lining trolley lengthens panel radius less than former lining cutting panel radius, No. 1 lining trolley lengthens panel length and lengthens panel length less than No. 2 lining trolleys, window II (14) is built along what its longitudinal centre line symmetry offered that some rows be arranged in parallel in No. 1 lining trolley lining cutting panel both sides, on longitudinal centre line, three push pipe pumping holes II (15) are laid at interval, often row builds the window I of building of relevant position on window II and No. 2 lining trolley lining cutting panels and is linked as a row,
(3) leakproof self-adhering rubber band (16) processing
3.1 leakproof self-adhering rubber bands expand into strip rectangular structure, tape thickness lengthens the difference of panel radius and former lining cutting panel radius equal to No. 1 lining trolley, width lengthens the length of panel equal to No. 1 lining trolley, length is more than lining trolley panel hoop length, to reserve lap segment length, leakproof self-adhering rubber band lower surface has adhered layer, upper surface to offer the joint-cutting (17) of crisscross setting, and the joint-cutting degree of depth is to lengthen plate thickness 1cm more than No. 2 lining trolleys;
Leakproof self-adhering rubber band is affixed on No. 1 lining trolley by 3.2 to be lengthened on panel;
Step 2, direct connection lining construction
(1) preparation
After in tunnel, excavation and support has worked, lay geotextiles and splash guard, again bar-mat reinforcement and drain pipe be installed, various built-in fittings or be fixed on lining trolley or be fixed on reinforced mesh, setting-out goes out tunnel center line more afterwards, if curved tunnel, then tunnel center line becomes broken line by lining trolley length setting-out, re-lays traveling rail afterwards, prepares lining trolley location;
(2) lining trolley location
First No. 1 lining trolley is moved ahead by 2.1, and the distance that moves ahead is with more than No. 1 lining trolley length 0.5m;
No. 2 lining trolley travelings are put in place by 2.2, rise lining cutting panel jack, make lining cutting panel absolute altitude put in place after centering, and reinflated side form is fixed with screw mandrel after putting in place, complete No. 2 lining trolley location;
No. 1 lining trolley is fallen back by 2.3, make No. 1 lining trolley lengthen panel and No. 2 lining trolleys lengthen panel lap, afterwards by No. 1 lining trolley centering, rise lining cutting panel jack, the joint-cutting making leakproof self-adhering rubber band holds out against No. 2 lining trolleys and lengthens lower panels, and along stitching indentation compressive state, being uncompressed part, lengthen panels, No. 1 lining trolley panel with No. 2 lining trolleys concordant, launch No. 1 lining trolley side template, fix with screw mandrel after putting in place, waterstop and stopper template are finally installed again, complete the overlap joint of No. 1 lining trolley and No. 2 lining trolleys;
(3) concreting
Concreting adopts oblique layer casting method, concrete casting method is: builds window I from No. 2 lining trolley rear end outermost rows and builds window II propelling to No. 1 interior row in lining trolley front end, simultaneously along the alternately construction of two lining trolley panel longitudinal centre line left and right sides symmetries, for the every side of longitudinal centre line multiple rows of build window build time, being built window by interior row to build window to outermost row and build and build track in the oblique grade line of the multilamellar (18) that extends forward, the gradient of every layer of oblique grade line not can exceed that 10O, outermost row builds window rear end and interior row to build the track of building of window front end be straightway (19);
(4) demoulding
After concreting, after concrete initial set, start to remove from the bottom up stopper mould, after concrete final set and reaching dismountable bearing form intensity, unscrew screw mandrel, first pack up No. 1 lining trolley side form, fall No. 1 lining trolley panel jack, then No. 1 lining trolley moves ahead, then according to said sequence makes No. 2 lining trolley demouldings;
One lining cutting has circulated, and just can position successively, spread rail, carries out subsequent cycle construction.
2. big counter-slope narrow-bore tunnel according to claim 1 dual stage car direct connection lining construction method, it is characterized in that in above-mentioned steps (3), when alternately building along two lining trolley panel longitudinal centre line left and right sides symmetries, when left side first row build window build maximum height reach 1.5m time, replacing to right side first row builds window, when right side first row build window build highly reach 3m time, build window from this side second row again to start to build, so move in circles, complete all concrete pouring constructions building window.
3. big counter-slope narrow-bore tunnel according to claim 1 and 2 dual stage car direct connection lining construction method, it is characterized in that No. 2 lining trolleys lengthen the length of panel is 20cm, the length of No. 1 lining trolley lengthening panel is 10cm, and No. 1 lining trolley lengthens panel radius less than former lining cutting panel radius 5cm.
4. big counter-slope narrow-bore tunnel according to claim 3 dual stage car direct connection lining construction method, is characterized in that the thickness of leakproof self-adhering rubber band is 5cm, and width is 10cm.
5. big counter-slope narrow-bore tunnel according to claim 1 and 2 dual stage car direct connection lining construction method, it is characterized in that when concreting to push pipe, build according to the direction advanced from lining trolley rear end forward end, first carried out push pipe by three push pipe pumping holes I at No. 2 lining trolley tops one by one to build, then carried out push pipe by three push pipe pumping holes II at No. 1 lining trolley top one by one and build.
6. big counter-slope narrow-bore tunnel according to claim 1 and 2 dual stage car direct connection lining construction method, after it is characterized in that the demoulding, check leakproof self-adhering rubber band, because the joint-cutting degree of depth lengthens plate thickness 1cm more than No. 2 lining trolleys, if resilient after the demoulding, after being cleaned out by mortar between joint-cutting, namely can be used for subsequent cycle construction; According to field observation, if cannot restoring to the original state after the demoulding and spillage phenomenon occurring, then need to change rubber strip, during replacing, the leakproof self-adhering rubber band that only need to tear old, sticks new leakproof self-adhering rubber band.
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