CN101871352A - Water-proof method for seepagetunnel with super burial depth - Google Patents
Water-proof method for seepagetunnel with super burial depth Download PDFInfo
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- CN101871352A CN101871352A CN 201010201217 CN201010201217A CN101871352A CN 101871352 A CN101871352 A CN 101871352A CN 201010201217 CN201010201217 CN 201010201217 CN 201010201217 A CN201010201217 A CN 201010201217A CN 101871352 A CN101871352 A CN 101871352A
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Abstract
The invention provides a water-proof method for a seepagetunnel with super burial depth. The method comprises the following steps: before the construction, carrying out the step of increasing the thickness of duct pieces and the step of enhancing the connection between contact surfaces and end faces of the duct pieces, wherein the step of enhancing the connection between the contact surfaces and the end faces of the duct pieces comprises the following steps: increasing the quantity of annular bolts and adding a rebate groove on the annular surfaces of the duct pieces; and increasing positioning rods and double-channel waterstop bands on the end faces of the duct pieces; during the construction, sealing the top of a tube piece lining with a top block of small size when assembling the wedged tube pieces; and selecting rational grouting points on the assembled duct pieces to synchronous grout the duct pieces; and after the construction, filling and blocking handholes and caulked joints of the duct pieces. By using the technical scheme, improving the original duct piece design and constituting a rational construction process, the method ensures the forming quality of the tunnel and controls the synchronous grouting and ensures the stability of the tunnel and the caulked joints of the tunnel and the like so as to meet the water-proof requirement of the seepagetunnel with super burial depth.
Description
Technical field
Waterproof method when the present invention relates to a kind of constructing tunnel relates in particular to a kind of waterproof method of seepagetunnel with super burial depth.
Background technology
Develop rapidly along with the urban underground engineering construction, construction of tunnel is also gradually towards burying deeplyer, developing apart from longer, functional diversities direction, general tunnel water proofing technology can not satisfy existing construction speed requirement, and the waterproof index that especially how effectively guarantees the drinking water tunnel becomes design and unit in charge of construction's emphasis considers a problem.
The suffered limitation of present tunnel water proofing is bigger, and the restraining factors of conventional waterproof technology comprise: the buried depth degree of depth that the tunnel is bigger, and the effect of external and internal pressure after the seepage tunnel water flowing, whether drinking water quality can be guaranteed etc.Any one factor all might determine the success or failure of diversion works.
Surpass in 20 meters the constructing tunnel at average buried depth, also do not have special effective method to guarantee waterproof effect, under such condition, certainly will will reform the method for tunnel water proofing, to reach the waterproof technique requirement of seepagetunnel with super burial depth.
Summary of the invention
The object of the invention is to provide a kind of method, by improving the design of original section of jurisdiction, formulating reasonable construction technology and guarantee that tunnel forming quality, control synchronous grouting guarantee that steps such as tunnel stability and tunnel filleting satisfy the waterproof requirement of seepagetunnel with super burial depth.
To achieve the above object, the invention provides a kind of water-proof method for seepagetunnel with super burial depth, comprise step:
Before construction, increase the step of section of jurisdiction thickness; And strengthen the section of jurisdiction and touch step of connecting between face and end face indirectly; Described reinforcement section of jurisdiction touches indirectly that step of connecting comprises between face and end face, in increasing hoop bolt quantity on the anchor ring of section of jurisdiction and set up concavo-convex tongue-and-groove on the anchor ring of section of jurisdiction, sets up locating bar and two pass waterstop on the end face of section of jurisdiction.The rainwater expanded rubber is pasted in the outside of described two pass waterstop.
In construction, the step of using undersized jacking block that pipe-plate lining is bound when assembly unit is carried out in the wedge shape section of jurisdiction; On spliced section of jurisdiction, choose rational slip casting point carries out synchronous grouting to the section of jurisdiction step.In described slip casting step, on the section of jurisdiction, choose 4 slip casting points and synchronous grouting is carried out in the section of jurisdiction with single liquid slurry; After described slip casting step finishes, connecting bolt is tightened up.When segment assembly, control ovality and magnitude of misalignment, and the ring height of section of jurisdiction is controlled in the 4mm.When slip casting, select corresponding grouting pressure and grouting amount according to the soil layer situation.
After construction, hand hole and section of jurisdiction filleting are filled the step of shutoff.Described hand hole comprises the big hand hole of hoop and vertical little hand hole, carrying out adopting interfacial agents to handle basal plane when hand hole is filled, adopts super early strength micro expansion cement to carry out hand hole then and fills, and sets up zinc-plated dowel in big hand hole; Described section of jurisdiction filleting comprises circumferential weld, longitudinal joint and the deformation joint of general section of jurisdiction, is carrying out filling up polyethylene bar, pointing high modulus polyurethane fluid sealant then when filleting is filled in the tunnel lining piece.
Pass through technique scheme, water-proof method for seepagetunnel with super burial depth of the present invention is by improving the compactness that has guaranteed between section of jurisdiction contact surface and end face to the design of original section of jurisdiction, and formulation reasonable construction technology assurance tunnel forming quality, control synchronous grouting are guaranteed tunnel stability, steps such as tunnel filleting filling are satisfied the waterproof requirement of seepagetunnel with super burial depth after construction.
Description of drawings
Fig. 1 is the flow chart of water-proof method for seepagetunnel with super burial depth of the present invention.
Fig. 2 is the connection diagram of end face four bolts in section of jurisdiction in the water-proof method for seepagetunnel with super burial depth of the present invention;
Fig. 3 is the schematic diagram of the rebate design of anchor ring in the water-proof method for seepagetunnel with super burial depth of the present invention;
Fig. 4 is the schematic diagram of end face locating bar design in the water-proof method for seepagetunnel with super burial depth of the present invention;
Fig. 5 is section of jurisdiction outer course in the water-proof method for seepagetunnel with super burial depth of the present invention, interior elastic caoutchouc and water-absorbing sponge figure schematic diagram;
Fig. 6 is bind for a short time schematic diagram of piece figure of pipe-plate lining in the water-proof method for seepagetunnel with super burial depth of the present invention;
Fig. 7 is the schematic diagram of synchronous grouting point position and grouting amount control in the water-proof method for seepagetunnel with super burial depth of the present invention; And
Fig. 8 is the schematic diagram of section of jurisdiction infiltration behind the employing water-proof method for seepagetunnel with super burial depth of the present invention, the situation of breaking.
The specific embodiment
Illustrate in greater detail technical scheme of the present invention and technique effect below in conjunction with drawings and Examples.
As shown in Figure 1, water-proof method for seepagetunnel with super burial depth of the present invention improves the design of original section of jurisdiction before mainly being included in construction; Formulation reasonable construction technology guarantees the tunnel forming quality and controls synchronous grouting and guarantee tunnel stability in construction; And after construction, carry out the waterproof requirement that steps such as tunnel filleting satisfy seepagetunnel with super burial depth.
Fig. 2 to Fig. 5 has shown the improvement that water-proof method for seepagetunnel with super burial depth of the present invention carries out the design of original section of jurisdiction before construction.
As shown in Figure 2, the thickness of water-proof method for seepagetunnel with super burial depth of the present invention by increasing the section of jurisdiction to be resisting the external pressure that big buried depth brings, and the number by increasing anchor ring bolt 10 is to have increased the compactness that end face connects.In one embodiment, the liner structure internal diameter is 5840mm, external diameter is 6800mm, thickness is 480mm, ring width is 1.5m, the tunnel maximum gradient is 4.5%, minimum radius of horizontal curve is R992.5m, earthing bosom, top, tunnel is 33.8m, the most shallow place of earthing is 16.08m, the end face of every section of jurisdiction is improved to four M36 bolts 10 from two bolts connections and connects, and therefore the bolt 10 of an endless tube sheet (every endless tube sheet is made up of 6 tubule sheets 60, will illustrate with reference to figure 6 in following cooperation) is improved to 24 bolts connections.
As shown in Figures 3 and 4, water-proof method for seepagetunnel with super burial depth of the present invention is more closely knit by anchor ring contact after the concavo-convex tongue-and-groove 20 of increase is finished assembly unit between the anchor ring of section of jurisdiction, and makes the assembly unit location more accurate by increase locating bar 30 settings at the section of jurisdiction end face.Specifically,
As shown in Figure 5, water-proof method for seepagetunnel with super burial depth of the present invention is by being improved to single track waterstop waterproof of the prior art inside and outside two pass EPDM elastic caoutchouc waterstop 40.Preferably, on the elastic caoutchouc basis, can directly paste the waterproof effect of hydro-expansive rubber 50 with further reinforcement tunnel.
Shown that as Fig. 6 and Fig. 7 water-proof method for seepagetunnel with super burial depth of the present invention formulates reasonable construction technology to guarantee the tunnel forming quality and to control synchronous grouting to guarantee tunnel stability in construction.
As shown in Figure 6, the every ring of every endless tube sheet built is made up of six tubule sheets 60 in the water-proof method for seepagetunnel with super burial depth of the present invention, is designated as B1, B2, B3, L1, L2, F totally six models and take the staggered joint erection mode to splice.The F piece is as binding piece, size is about 1/3rd of calibrated bolck, guaranteeing that adjacent two ring straight joints are no more than under 3 the requirement, with respect to the medium size piece that binds, the piece of selecting to bind for a short time makes the position of F piece select to have bigger leeway, the whole piece tunnel axis is kept smoothly having played important function, waterproof effect is guaranteed.
Below further specifically describe the control of water-proof method for seepagetunnel with super burial depth of the present invention to construction technology.Before assembly unit, the type selecting of section of jurisdiction directly determines the formulation of assembling process.In the assembly unit process, need observant technology be: need the special messenger before the assembly unit section of jurisdiction is checked, the scope of examination comprises the section of jurisdiction model, places in proper order, placement direction, section of jurisdiction outward appearance situation, sealing rod stickup situation etc.When being advanced into jack and stretching out 1700mm, measure 4 gaps of shield tail, manually carry out the selection of key position.Key selects to require: adjacent ring straight joint number does not allow above 3.
Whether must someone command in shield structure the place ahead during assembly unit, it is long to prevent that the weight lifting arm from stretching out, and causes that the section of jurisdiction extrados is cracked, observe the section of jurisdiction simultaneously and turn up in.When first of assembly unit, accurate location, the strict control anglec of rotation and in turn up.Hoop, longitudinal bolt must be tightened in section of jurisdiction of every assembly unit, and place waterproof washer on every bolt, and for longitudinal bolt, the bolt length that the two ends, section of jurisdiction spill must be consistent, and nut must all be screwed to the position.Must be noted that opening during two adjacent block of assembly unit L1, L2, especially during the L2 assembly unit, must measure the aperture position between two adjacent block, regulate L2 piece position and be in (this size must be guaranteed) more than the 840mm until opening.If find in the assembly unit L2 process, be difficult to perforate is controlled in the prescribed limit by adjusting to L2, after then L2 locatees to greatest extent, before the piece assembly unit of binding, again L1 is positioned, suitable until opening.
Below further specifically describe water-proof method for seepagetunnel with super burial depth of the present invention stability controlled.The index that characterizes tunnel stability is more, relevant with waterproof quality tunnel come-up, tunnel oval-shaped degree is arranged, encircles the discrepancy in elevation etc.And in practice, tunnel stability and synchronous grouting are closely bound up.This engineering adopts single liquid slurry, by grouting pump slip casting is filled in shield tail space, and the propelling of shield structure, pipe sheet assembling, synchronous grouting are organically combined, and reaches the Dynamic Construction balance, thereby improves the construction quality of tunnel integral body.
As shown in Figure 7,1 stroke is roughly equal to 0.012m
3By practice, advance since the 28th ring, four points of synchronous grouting carry out pressure injection simultaneously, and one to encircle total mud jacking amount constant, is 6-7m
3A1, A4 top each pressure injection 2m of two pipelines
3A2, A3 bottom each pressure injection 1m of two pipelines
3Follow the synchronism of mud jacking in the progradation, the number of stroke according to mud jacking decides the shield driving speed in principle, stops to carry out the ftercompction slurry in case of necessity.After one ring advance to finish, pressed once every one hour, must not blanking time oversize or unmanned mud jacking.In normal progradation, synchronous grouting is based on the control grouting pressure, and grouting pressure reaches 7.0bar and stops slip casting when above, and grouting amount is about about 6～7m3.
In progradation, when moving on to the limit behind the weight lifting arm, require all the section of jurisdiction bolts in preceding 3 rings are tightened up.
Under above assembly unit and grouting process control, its ovality is controlled in 4 ‰ D (D=6800mm) scope behind the pipe sheet assembling; Its ring discrepancy in elevation is controlled in the 4mm, and the dislocation of two pass elastic caoutchouc waterstop can guarantee that within 6mm, the waterproof action of waterstop is unaffected.
Below further specify water-proof method for seepagetunnel with super burial depth of the present invention and after construction, carry out steps such as tunnel filleting.After the tunnel advanced end, hand hole on the section of jurisdiction and circumferential weld longitudinal joint needed to handle, and this engineering adopts the mode of shutoff hand hole and filleting.Wherein the section of jurisdiction hand hole blocking comprises the big hand hole of hoop (cast iron hand hole) and vertical little hand hole, all adopts interfacial agents to handle basal plane, adopts super early strong (microdilatancy) cement of aluminium sulfate to carry out hand hole then and fills, and need set up in addition in the big hand hole
Zinc-plated dowel, every Kong Yigen is processed into
Shape, heat dip zinc treating, coating layer thickness 70 μ m.Interface treating agent adopts acrylic acid fat liquor interface treating agent, and should meet certain index: with wire brush the cast iron basal plane is cleaned out earlier before hand hole is filled, removed the mud in the hand hole, the foreign material such as loosening cement block on cast iron limit.In hand hole cast iron basal plane (comprising bolt, packing ring, nut) brushing three degree interfacial agents, acrylate emulsion consumption is 1.2kg/m then
2, compound is 3kg/m
2In concrete surface brushing once interfacial agents, acrylate emulsion consumption is 0.4kg/m
2, compound is 1kg/m
2
Should keep its density in super early strong (microdilatancy) cement placement process of aluminium sulfate, its surface should guarantee with the section of jurisdiction intrados equal planeness is arranged after filling finished.The cement that shutoff is used should stir as required, and the cement block that has hardened before the filling must not be inserted hand hole, to guarantee the density of inserts.Two waists following hand hole in tunnel is filled and is finished and should wipe one's face immediately, carries out after the initial set wiping one's face the second time, guarantees planeness.
In addition, the section of jurisdiction filleting comprises ring (indulging) seam and the deformation joint of general section of jurisdiction, all adopts with a kind of filleting mode.Promptly in the tunnel lining piece, fill up polyethylene bar, pointing high modulus polyurethane fluid sealant then.
Below cooperate Fig. 8 that the effect of water-proof method for seepagetunnel with super burial depth of the present invention is described.Super large buried depth long distance water diversion tunnel is relatively more rare at home, and its waterproof problem need be taken all factors into consideration.No matter be in design, still in construction technology and stability and later stage aided process management, higher requirement arranged all.The present invention will need the combined factors considered, work out the standards such as section of jurisdiction design, synchronous grouting technology, assembling process and stability control that satisfy the high standard waterproof requirement.
As shown in Figure 8, the statistical form exposed conduit sheet of infiltration and presentation quality such as cracked does not have obvious seepage, weeping, and the small size mark that wets is only arranged.On inspection, the whole leakage rate in tunnel has obtained consistent favorable comment between one of percentage is to two, the detail statistics of section of jurisdiction waterproof effect such as the infiltration of figure section of jurisdiction, the situation of breaking.
Claims (8)
1. a water-proof method for seepagetunnel with super burial depth is characterized in that, comprises step:
A. before construction, increase the step of section of jurisdiction thickness; And strengthen the section of jurisdiction and touch step of connecting between face and end face indirectly;
B. in construction, the step of using undersized jacking block that pipe-plate lining is bound when assembly unit is carried out in the wedge shape section of jurisdiction; On spliced section of jurisdiction, choose rational slip casting point carries out synchronous grouting to the section of jurisdiction step.
2. water-proof method for seepagetunnel with super burial depth as claimed in claim 1, it is characterized in that, described reinforcement section of jurisdiction touches indirectly that step of connecting comprises between face and end face: in increasing hoop bolt quantity on the anchor ring of section of jurisdiction and set up concavo-convex tongue-and-groove on the anchor ring of section of jurisdiction, set up locating bar and two pass waterstop on the end face of section of jurisdiction.
3. water-proof method for seepagetunnel with super burial depth as claimed in claim 2 is characterized in that, in described slip casting step, chooses 4 slip casting points and with single liquid slurry synchronous grouting is carried out in the section of jurisdiction on the section of jurisdiction; After described slip casting step finishes, connecting bolt is tightened up.
4. water-proof method for seepagetunnel with super burial depth as claimed in claim 3 is characterized in that, also be included in construction after, hand hole and section of jurisdiction filleting are filled the step of shutoff.
5. water-proof method for seepagetunnel with super burial depth as claimed in claim 4 is characterized in that, the rainwater expanded rubber is pasted in the outside of described two pass waterstop.
6. water-proof method for seepagetunnel with super burial depth as claimed in claim 5 is characterized in that, controls ovality and magnitude of misalignment when segment assembly, and the ring height of section of jurisdiction is controlled in the 4mm.
7. water-proof method for seepagetunnel with super burial depth as claimed in claim 6 is characterized in that, selects corresponding grouting pressure and grouting amount according to the soil layer situation when slip casting.
8. water-proof method for seepagetunnel with super burial depth as claimed in claim 7, it is characterized in that, described hand hole comprises the big hand hole of hoop and vertical little hand hole, carrying out adopting interfacial agents to handle basal plane when hand hole is filled, adopt super early strength micro expansion cement to carry out hand hole then and fill, in big hand hole, set up zinc-plated dowel; Described section of jurisdiction filleting comprises circumferential weld, longitudinal joint and the deformation joint of general section of jurisdiction, is carrying out filling up polyethylene bar, pointing high modulus polyurethane fluid sealant then when filleting is filled in the tunnel lining piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010201217 CN101871352A (en) | 2010-06-13 | 2010-06-13 | Water-proof method for seepagetunnel with super burial depth |
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| CN 201010201217 CN101871352A (en) | 2010-06-13 | 2010-06-13 | Water-proof method for seepagetunnel with super burial depth |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071946A (en) * | 2010-12-31 | 2011-05-25 | 上海市隧道工程轨道交通设计研究院 | Plugging device for large-aperture hand hole in shield tunnel |
| CN102080547A (en) * | 2010-12-31 | 2011-06-01 | 上海市隧道工程轨道交通设计研究院 | Method for plugging big aperture hand hole in shield tunnel |
| CN103061780A (en) * | 2012-12-25 | 2013-04-24 | 上海隧道工程股份有限公司 | Operating tunnel structure reinforcement construction method through steel ring |
| CN103742167A (en) * | 2013-12-30 | 2014-04-23 | 中铁第四勘察设计院集团有限公司 | Tunnel segment structure with difference waterproof capability |
| CN103758531A (en) * | 2013-09-29 | 2014-04-30 | 深圳中海建筑有限公司 | General method for laying out and assembling wedge-shaped duct pieces |
| CN108425691A (en) * | 2018-03-24 | 2018-08-21 | 徐州迈斯特机械科技有限公司 | A kind of tunnel waterproofing method |
| CN108487917A (en) * | 2018-04-25 | 2018-09-04 | 中铁隧道局集团有限公司 | A kind of tunnel duct piece hand hole blocking device and method |
| CN109519194A (en) * | 2018-12-13 | 2019-03-26 | 西南交通大学 | The hexagon section of jurisdiction in the tunnel boring machine tunnel on swelled ground stratum and construction method |
| CN111253117A (en) * | 2018-12-03 | 2020-06-09 | 沈阳市政地铁管片有限公司 | Anti-erosion and anti-corrosion concrete shield segment |
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| CN101338681A (en) * | 2008-08-08 | 2009-01-07 | 上海市隧道工程轨道交通设计研究院 | Shield tunneling segment pretightening device |
| CN201407054Y (en) * | 2009-05-26 | 2010-02-17 | 中铁第四勘察设计院集团有限公司 | Segment connecting structure of subway shield tunnel |
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Patent Citations (3)
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| CN101338681A (en) * | 2008-08-08 | 2009-01-07 | 上海市隧道工程轨道交通设计研究院 | Shield tunneling segment pretightening device |
| CN201407054Y (en) * | 2009-05-26 | 2010-02-17 | 中铁第四勘察设计院集团有限公司 | Segment connecting structure of subway shield tunnel |
| CN101705829A (en) * | 2009-10-21 | 2010-05-12 | 上海隧道工程股份有限公司 | Method for controlling quality of tunnel pipe sheet built by using shield method and pipe sheet structure |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071946A (en) * | 2010-12-31 | 2011-05-25 | 上海市隧道工程轨道交通设计研究院 | Plugging device for large-aperture hand hole in shield tunnel |
| CN102080547A (en) * | 2010-12-31 | 2011-06-01 | 上海市隧道工程轨道交通设计研究院 | Method for plugging big aperture hand hole in shield tunnel |
| CN103061780A (en) * | 2012-12-25 | 2013-04-24 | 上海隧道工程股份有限公司 | Operating tunnel structure reinforcement construction method through steel ring |
| CN103061780B (en) * | 2012-12-25 | 2015-09-09 | 上海隧道工程股份有限公司 | Operation tunnel structure steel loop reinforced construction method |
| CN103758531A (en) * | 2013-09-29 | 2014-04-30 | 深圳中海建筑有限公司 | General method for laying out and assembling wedge-shaped duct pieces |
| CN103742167A (en) * | 2013-12-30 | 2014-04-23 | 中铁第四勘察设计院集团有限公司 | Tunnel segment structure with difference waterproof capability |
| CN103742167B (en) * | 2013-12-30 | 2016-06-22 | 中铁第四勘察设计院集团有限公司 | Possesses the Structural Test of Tunnel Segments of difference waterproof ability |
| CN108425691A (en) * | 2018-03-24 | 2018-08-21 | 徐州迈斯特机械科技有限公司 | A kind of tunnel waterproofing method |
| CN108487917A (en) * | 2018-04-25 | 2018-09-04 | 中铁隧道局集团有限公司 | A kind of tunnel duct piece hand hole blocking device and method |
| CN111253117A (en) * | 2018-12-03 | 2020-06-09 | 沈阳市政地铁管片有限公司 | Anti-erosion and anti-corrosion concrete shield segment |
| CN109519194A (en) * | 2018-12-13 | 2019-03-26 | 西南交通大学 | The hexagon section of jurisdiction in the tunnel boring machine tunnel on swelled ground stratum and construction method |
| CN109519194B (en) * | 2018-12-13 | 2023-10-20 | 西南交通大学 | Hexagonal duct piece of tunnel boring machine for expanding soil layer and construction method |
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Application publication date: 20101027 |