CN108756955A - Shield tunnel gravity type sealing plugging structure and method - Google Patents
Shield tunnel gravity type sealing plugging structure and method Download PDFInfo
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- CN108756955A CN108756955A CN201810611777.XA CN201810611777A CN108756955A CN 108756955 A CN108756955 A CN 108756955A CN 201810611777 A CN201810611777 A CN 201810611777A CN 108756955 A CN108756955 A CN 108756955A
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- 230000005484 gravity Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 title claims abstract description 23
- 239000000945 filler Substances 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 20
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 79
- 239000010959 steel Substances 0.000 claims description 79
- 238000005266 casting Methods 0.000 claims description 78
- 238000005553 drilling Methods 0.000 claims description 20
- 239000010410 layer Substances 0.000 claims description 19
- 230000008014 freezing Effects 0.000 claims description 17
- 238000007710 freezing Methods 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 14
- 238000005728 strengthening Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000007569 slipcasting Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 13
- 230000008595 infiltration Effects 0.000 abstract description 4
- 238000001764 infiltration Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/01—Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses shield tunnel gravity type sealing plugging structures and method, structure to include：Twice churning plug wall, interval sealed set are filled with concrete or mortar filler in intact section of jurisdiction between twice churning plug wall；Freezes body, the filler being set in the section of jurisdiction is interior the filler in section of jurisdiction is divided into the two parts being fully sealed, and further includes the method for carrying out plugging construction by plugging structure.The plugging structure and construction method of the present invention solves section of jurisdiction soil and removes the uncontrollable disadvantage of range, also solves the problems, such as plugging structure infiltration, has preferable application value in the processing of shield tunnel cave in accident.
Description
Technical field
The present invention relates to subway work technical fields.It is more particularly related to which shield tunnel gravity type sealing seals
Bridging structure and method.
Background technology
Subway is the important way for promoting urban transportation ability, shield tunnel because mechanization degree is high, speed of application is fast,
It the advantages that safe, noiseless, is widely applied in metro construction, becomes the main construction party of metro construction
Method, but since shield method is not grown in China's application time, and shield technique is complicated, working procedure is more, exposes many problems, respectively
Kind accident frequently occurs.Especially shield tunnel cave in accident, once occur, it will cause larger casualties and economic damage
It loses.In recent years, there is the relevant report that shield tunnel construction caves on the ground such as Shanghai, Hangzhou, Nanjing, Tianjin, Guangzhou.
Since shield tunnel buried depth is big, once cave in accident occurs, engineering reparation difficulty is larger, seeks intact section of jurisdiction and damage
Behind bad section of jurisdiction line of demarcation, the reliability that tunnel blocks water sealing structure is to influence the key factor of later stage recovery project safety, but mesh
Before there is no the shield sealing plugging structure and method of complete set, be easy to cause second accident.Therefore there is an urgent need for design a kind of shield
Tunnel gravity type sealing plugging structure and method, it is ensured that Segment rehabilitation work safety quickly carries out, which has with construction method
There is higher application value.
Invention content
It is an object of the present invention to provide shield tunnel gravity type sealing plugging structure and methods, solve section of jurisdiction soil
Remove the uncontrollable disadvantage of range, also solve the problems, such as plugging structure infiltration, shield tunnel cave in accident processing in have compared with
Good application value.
In order to realize these purposes and other advantages according to the present invention, provides shield tunnel gravity type sealing and block knot
Structure, including：Twice churning plug wall, interval sealed set are mixed in being filled in intact section of jurisdiction, between twice churning plug wall
Solidifying soil or mortar filler；Freezes body, the filler being set in the section of jurisdiction are interior the filler in section of jurisdiction to be divided into
Hermetically sealed two parts.
Preferably, the freezing pipe that the freezes body is set up in parallel side by side by more is formed by construction freezing method, described
Freezing pipe is not more than 1.2m along tunnel axis direction spacing, is not more than 1.4m, a diameter of 108mm of freezing pipe along tunnel lateral direction array pitch
~159mm.
Preferably, for the freezes body along tunnel direction thickness at least 2m, short transverse is beyond section of jurisdiction vault and encircles outside bottom
Profile at least 2m, horizontal direction are more than section of jurisdiction both sides at least 1m.
Preferably, further include multiple supplementary structures comprising punch hole and the steel pile casting that pipe and axis overlap are poured,
Multiple holes that punch are arranged along tunnel direction at section of jurisdiction vault interval and through section of jurisdiction, and the steel pile casting diameter is more than described open
Hole diameter, the bore dia that punches be more than it is described pour pipe diameter, the steel pile casting lower end is embedded in the section of jurisdiction, on hold level with both hands
Together in ground, the pipe that pours passes vertically through the hole that punches.
Preferably, described the hole that punches is along the setting of tunnel direction uniform intervals and spacing is no more than 8m, and tunnel each breaks
The hole that punches only is arranged in face；The height of steel pile casting insertion section of jurisdiction not less than 5cm and is not more than section of jurisdiction protective layer thickness.
Preferably, the concrete or mortar filler along pour pipe filled in steel pile casting at the top of section of jurisdiction with up to
Few 1m, forms mortar or concrete plug.
Preferably, also integrally formed with a ring shape grouting layer on the steel pile casting outer wall, the upper end on steel pile casting
Hold neat, lower end level with both hands and be higher than steel pile casting lower end, the grouting layer annular one encloses uniform intervals and is provided with multiple injected holes, penetrates through institute
The upper and lower side of grouting layer is stated, being additionally provided on the steel pile casting outer wall between the steel pile casting lower end and the grouting layer lower end can edge
The annular barrier plate that steel pile casting outer wall slides up and down has a diameter larger than the grouting layer diameter, is provided in the barrier plate more
A L-type passage, the upper end is corresponded with multiple injected holes, side is penetrated through to outside barrier plate.
Preferably, the steel pile casting inner wall is arranged at intervals with multiple first location structures along its short transverse comprising
Along multiple first baffles of steel pile casting inner wall circumferential direction uniform intervals setting, it is articulated with the steel pile casting inner wall and the first gear
The side at plate towards steel pile casting center is arcwall face, and the supplementary structure further includes positioning pipe, and the diameter of the positioning pipe is bigger
In the diameter for pouring pipe, the arcwall face of the first baffle is interference fitted with the positioning pipe outer wall, the positioning pipe outer wall edge
Its short transverse is provided with multiple second location structures comprising along multiple the second of positioning pipe outer wall circumferential direction uniform intervals setting
Baffle is articulated in the positioning pipe outer wall, and first location structure and the second location structure correspond, and described first
Baffle is also corresponded with second baffle, is connected by drawstring between the neighbouring second baffle of the positioning pipe outer wall same column
It connects, the length of the drawstring is equal to the spacing between adjacent second baffle, and drawstring is also connected on the second baffle of the top.
The present invention also provides a kind of shield tunnel gravity type sealing method for blocking, include the following steps：
Step 1：Construction setting twice churning plug wall in intact section of jurisdiction；
Step 2：Multiple holes that punch are set on section of jurisdiction vault between twice churning plug wall；
Step 3：Spaced be staggered in hole that will punch is divided into two groups, and one of which punches hole jetting, another group of hole pumping that punches
Mud mixture in suction pipe piece after the completion of suction cleaning, then passes through hole casting concrete or the mortar filling into section of jurisdiction of punching
Object；
Step 4：Freezing pipe is laid in filler and forms freezes body.
Preferably, the step 2 has also carried out the setting of supplementary structure before the hole that punches is arranged, and specifically includes：
1) the section of jurisdiction vault between twice churning plug wall equidistantly drills, and drilling does not penetrate section of jurisdiction, and in boring procedure
Steel pile casting follows up and is embedded into the section of jurisdiction of drilling；
2) rotary jet strengthening or grouting and reinforcing are carried out in steel pile casting and section of jurisdiction contact ring periphery；
3) the lower electronic convolution drilling machine of submersible type or other trepanning drilling machines in steel pile casting, formation diameter is less than at the top of section of jurisdiction
The hole that punches of steel pile casting；
4) pipe that pours that diameter is less than the hole that punches is transferred in steel pile casting, and carries out jetting or suction section of jurisdiction by pouring pipe
Mud mixture, and subsequently pour filler.
The present invention includes at least following advantageous effect：
1, it by both ends churning block wall, solves section of jurisdiction soil and removes the uncontrollable disadvantage of range, more can guarantee gravity
The size of formula plugging structure.
2, freezes body is set among gravity type plugging structure, solves the problems, such as plugging structure infiltration, while freezes body
Shearing strength is higher, enhances the safety coefficient of gravity type plugging structure.
3, casting concrete or when mortar, forms concrete or mortar plug at the top of section of jurisdiction, can enhance plugging structure and exist
Leakproofness.
4, steel pile casting carries out slip casting or rotary jet strengthening, can prevent periphery sand from pouring in tunnel from steel pile casting and segment joint
It is interior.
Part is illustrated to embody by further advantage, target and the feature of the present invention by following, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the structural plan figure of the present invention；
Fig. 2 is the structure skiagraph of the present invention；
Fig. 3 is A-A cross-sectional views in Fig. 1 of the present invention；
Fig. 4 is B-B cross-sectional views in Fig. 1 of the present invention；
Fig. 5 is C-C cross-sectional views in Fig. 1 of the present invention；
Fig. 6 is the front view of steel pile casting of the present invention；
Fig. 7 is the vertical view of steel pile casting of the present invention.
Reference sign：
1, section of jurisdiction, 2, churning plug wall, 3, steel pile casting, 4, punch hole, 5, pour pipe, 6, filler, 7, freezes body, 8, freeze
Knot pipe, 9, concrete or mortar plug, 31, grouting layer, 32, barrier plate, 33, injected hole, 34, L-type passage, 35, first baffle,
36, second baffle, 37, drawstring, 38, positioning pipe.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute
Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the present invention, term " transverse direction ", " vertical
To ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", the instructions such as "outside" side
Position or position relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description,
It is not instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
As shown in Fig. 1 to 5, the present invention provides a kind of shield tunnel gravity type sealing plugging structure, including：Twice churning is stifled
Head wall 2, interval sealed set are filled with concrete or mortar filler in intact section of jurisdiction 1 between twice churning plug wall 2
6；Freezes body 7, in the filler 6 being set in the section of jurisdiction 1 with the filler 6 in section of jurisdiction 1 is divided to for be fully sealed two
Part.
In the above-mentioned technical solutions, 2 altitude range of churning plug wall can be the top of section of jurisdiction 1 to 1 bottom of section of jurisdiction, can also
More than 1 altitude range of section of jurisdiction, solves the soil removing uncontrollable disadvantage of range in section of jurisdiction 1, more can guarantee that gravity type blocks knot
The size of structure.The setting of freezes body 7 solves the problems, such as plugging structure infiltration, it is ensured that drips not permeable, while 7 shearing resistance of freezes body
Intensity is higher, enhances the safety coefficient of gravity type plugging structure.
Spacing between twice churning plug wall 2 is not less than L, and L is according to 1 damage location of section of jurisdiction and gravity type plugging structure
Length computation value.The computational methods of L：Water And Earth Pressures lateral pressure is F, and friction coefficient is a between plugging structure and section of jurisdiction, in section of jurisdiction
Diameter is R, and plugging structure unit weight is r, then L=F/ π R2ra。
In another technical solution, the freezes body 7 is applied by the more freezing pipes being set up in parallel side by side 8 by freezing process
Work is formed, and the freezing pipe 8 is not more than 1.2m along tunnel axis direction spacing, is not more than 1.4m along tunnel lateral direction array pitch, is freezed
8 diameter 108mm~159mm of pipe.Construction freezing method refers to that steel pipe jelly namely of the invention is squeezed into first drilling in aquifer
Knot pipe, leads the liquid nitrogen of people's cycle, makes the Freezing stratum as rapid on periphery, form hard frozen soil shell；It not only can guarantee that stratum is stablized, also
Impermeable role can be played.
In another technical solution, the freezes body 7 exceeds section of jurisdiction 1 along tunnel direction thickness at least 2m, short transverse
Vault and arch bottom outer profile at least 2m, horizontal direction is more than 1 both sides of section of jurisdiction at least 1m.
Further include multiple supplementary structures in another technical solution comprising pour that pipe 5 and axis overlap punches
Hole 4 and steel pile casting 3, multiple holes 4 that punch are arranged along tunnel direction at 1 vault interval of the section of jurisdiction and through section of jurisdiction 1, the steel shield
3 diameters of cylinder are more than 4 diameter of hole that punches, and 4 diameter of hole that punches pours 5 diameter of pipe, 3 lower end of the steel pile casting more than described
The embedded section of jurisdiction 1 is interior, upper end flushes in ground, and the pipe 5 that pours passes vertically through the hole 4 that punches.
In another technical solution, described the hole 4 that punches is along the setting of tunnel direction uniform intervals and spacing is no more than 8m, and
The hole 4 that punches only is arranged in each section in tunnel；The steel pile casting 3 is embedded in the height of section of jurisdiction 1 not less than 5cm and is not more than section of jurisdiction
1 protective layer thickness cannot penetrate section of jurisdiction 1.The setting for 4 spacing of hole that punches is set according to the mobility of concrete, coagulation
The radius of soil flowing is usually 4 meters or so, therefore spacing cannot be more than 8 meters, otherwise can not be complete by 1 inside filling of section of jurisdiction, and
It is in the generally construction of 1 diameter of section of jurisdiction of same section more than 6 meters, therefore the hole 4 that punches is arranged in same section can meet coagulation
The flowing requirement of soil.
In another technical solution, the concrete or mortar filler 6 along pour the filling of pipe 5 to 1 top of section of jurisdiction with
On at least 1m, form concrete or mortar plug 9, enhance the leakproofness inside section of jurisdiction 1.
In another technical solution, as shown in Fig. 6 to 7, also integrally formed with a ring shape on 3 outer wall of the steel pile casting
Grouting layer 31, the upper end is concordant with 3 upper end of steel pile casting, lower end is higher than 3 lower end of steel pile casting, and the grouting layer 31 annular, one circle is uniform
Multiple injected holes 33 are arranged at intervals with, the upper and lower side of the grouting layer 31,3 lower end of the steel pile casting and the grouting layer are penetrated through
Being additionally provided on 3 outer wall of steel pile casting between 31 lower ends can be along the annular barrier plate 32 that 3 outer wall of steel pile casting slides up and down, diameter
More than 31 diameter of the grouting layer, multiple L-type passages 34, the upper end and multiple injected holes 33 1 are provided in the barrier plate 32
One corresponds to, side is penetrated through to outside barrier plate 32.
In the above-mentioned technical solutions, 3 lower end of steel pile casting will subsequently be reinforced when being embedded into section of jurisdiction 1 by slip casting,
If direct grouting and reinforcing, slip casting effect is bad, therefore grouting layer 31 is provided with outside steel pile casting 3, and the follow-up of steel pile casting 3 is embedded into
After in section of jurisdiction 1, slip casting is carried out by the injected hole 33 being arranged on grouting layer 31, in addition the outer wall in 3 lower part of steel pile casting is also set up
There are annular barrier plate 32, barrier plate 32 that can carry out certain barrier effect to soil when steel pile casting 3 follows up, prevent injected hole 33
Obstruction, in addition its be set as to move up and down, when steel pile casting 3 is located in section of jurisdiction 1,1 outer wall of section of jurisdiction can be close to, prevent soil
The L-type passage 34 for entering in section of jurisdiction 1, while being arranged inside is corresponded with injected hole 33, even if steel pile casting 33 enters section of jurisdiction 1
Afterwards so that barrier plate 32 is close to grouting layer 31, also may make slurries from L-type passage 34 to around steel pile casting 3 and section of jurisdiction 1 into
Row sealing blocking.
In another technical solution, 3 inner wall of the steel pile casting is arranged at intervals with multiple first positioning along its short transverse
Structure comprising along multiple first baffles 35 of 3 inner wall circumferential direction uniform intervals of steel pile casting setting, be articulated with the steel pile casting 3
The side at inner wall and the first baffle 35 towards 3 center of steel pile casting is arcwall face, and the supplementary structure further includes positioning pipe 38,
The diameter of the positioning pipe 38, which is slightly larger than, pours the diameter of pipe 5, the arcwall face of the first baffle 35 with outside the positioning pipe 38
Wall is interference fitted, and 38 outer wall of the positioning pipe is provided with multiple second location structures along its short transverse comprising along positioning pipe
Multiple second baffles 36 of 38 outer wall circumferential direction uniform intervals setting, are articulated on 38 outer wall of the positioning pipe, and described first is fixed
Bit architecture and the second location structure correspond, and the first baffle 35 is also corresponded with second baffle 36, the positioning pipe
It is connected by drawstring 37 between the neighbouring second baffle 36 of 38 outer wall same columns, the length of the drawstring 37 is equal to adjacent the
Spacing between two baffles 36 is also connected with drawstring 37 on the second baffle 36 of the top.
In the above-mentioned technical solutions, when pouring pipe 5 and being located at construction in steel pile casting 3, position is not fixed, it is easy to it shakes,
Construction is had some impact on, therefore is provided with positioning pipe 38 in steel pile casting 3.When construction, first baffle 35 is hingedly set as only
It can rotate down, at most rotation is horizontal direction upwards, and second baffle 36 is set as to be rotated up, and is also at most turned downwards
It moves as horizontal direction, first baffle 35 rotates to transfer positioning pipe 38 in steel pile casting 3 straight down, not interfere in its natural state
Or other equipment device, for positioning pipe 38 in decentralization, it is straight up to be pulled second baffle 36 by the effect of drawstring 37
State does not interfere the smooth decentralization of positioning pipe 38, and after positioning pipe 38 is transferred in place, the height than actually transferring is more lower,
Second baffle 36 is located at 35 lower section of first baffle corresponding thereto at this time, unclamps drawstring 37, and second baffle 37 is automatically level
State pulls up positioning pipe 38 so that and the first plate washer 35 is driven to horizontality by second baffle 36, fixed pulling rope 37, and
The rotation direction of both one baffle 35 and second baffle 36, can be by positioning pipe 38 on the contrary, to opposing force between the two
Stationary positioned.In addition the top force effect that the arcwall face of multiple first baffles 35 passes through second baffle 36 with the outer wall of positioning pipe 38
After fit closely, that is, drawstring 37 fixation and first baffle 35 and the collective effect of the interference fit of positioning pipe 38 will determine
Position pipe 38 is positioned, and is poured pipe 5 and just carried out subsequent construction by 38 lowered inside of positioning pipe.
The present invention also provides a kind of shield tunnel gravity type sealing method for blocking, include the following steps：
Step 1：Construction setting twice churning plug wall 2 in intact section of jurisdiction 1；It is sealed according to 1 damage location of section of jurisdiction and gravity type
Bridging structure length computation value L punches 1 top construction twice churning plug wall 2 of section of jurisdiction, 2 spacing of twice churning plug wall from ground
It should be greater than being equal to L, the section of jurisdiction 1 at the churning plug wall 2 of 1 side of intact section of jurisdiction should be intact section of jurisdiction 1；
Step 2：Multiple holes 4 that punch are set on 1 vault of section of jurisdiction between twice churning plug wall 2；
Step 3：Spaced be staggered in hole 4 that will punch is divided into two groups, that is, adjacent two holes 4 that punch act on difference,
One of which punches 4 jetting of hole, and the mud mixture in section of jurisdiction 1 is aspirated in another group of hole 4 that punches, and after the completion of suction cleaning, then leads to
Punch hole 4 casting concrete or mortar filler 6 into section of jurisdiction 1 are crossed, pipe 5 is poured and remains less than concrete or mortar filling
0.5 meter of 6 face of object, the lifting of Xiang Shanging while pouring pour pipe 5；
Step 4：Freezing pipe 8 is laid in filler 6 and forms freezes body 7.
In another technical solution, the step 2 has also carried out the setting of supplementary structure before the hole 4 that punches is arranged, and has
Body includes：
1) 1 vault of section of jurisdiction between twice churning plug wall 2 equidistantly drills, and drilling does not penetrate section of jurisdiction 1, and boring procedure
Middle steel pile casting 3 follows up and is embedded into the section of jurisdiction 1 of drilling；
2) rotary jet strengthening or grouting and reinforcing are carried out in steel pile casting 3 and 1 contact ring periphery of section of jurisdiction, prevent around water and soil enter pipe
Piece 1；
3) it is small to form diameter at 1 top of section of jurisdiction for the lower electronic convolution drilling machine of submersible type or other trepanning drilling machines in steel pile casting 3
In the hole 4 that punches of steel pile casting 3；
4) decentralization diameter pours pipe 5 less than the hole 4 that punches in steel pile casting 3, and carries out jetting or suction by pouring pipe 5
1 mud mixture of section of jurisdiction, and filler 6 subsequently is poured, filler 6 is poured until being poured into steel pile casting 3 mixed more than 1m
Solidifying soil or mortar.
A kind of embodiment：
Process 1：Rotary digging drilling hole point is laid according to design drawing arrangement rotary jet strengthening, carries out drilling until drilling section of jurisdiction；
Jet grouting pile construction is carried out after to drilling toward section of jurisdiction back-up sand.It pushes up the rotary jet strengthening of damaged section of jurisdiction side ranging from section of jurisdiction bottom to section of jurisdiction
Portion, the rotary jet strengthening ranging from above 2.0m in section of jurisdiction bottom to section of jurisdiction top of intact section of jurisdiction side.
Process 2：Between twice churning plug wall, equidistantly it is drilled with three φ 800mm's or so by specified position
Large diameter hole, drilling are located at the vault of section of jurisdiction, and φ 750mm or so steel pile castings follow up in boring procedure, and drilling is until at the top of section of jurisdiction.
The electronic convolution drilling machine of lower submersible type, is abolished in concrete pipe sheet in steel pile castingThe hole that punches.Then coagulation is transferred
Soil pours pipe, and it is 300mm to pour pipe diameter, washes by water in both sides gate spool, the muddy water mixing in intermediate gate spool suction section of jurisdiction
Object, borehole cleaning is with pigging road until mud index reaches the requirement of concrete perfusion.
Process 3：Casting concrete in pipe is poured at three simultaneously, until 1m above section of jurisdiction, can stop concrete
It pours.
Process 4：It in damaged section of jurisdiction side concreting section part, punches at the top and bottom of section of jurisdiction, carries out from ground
Engineering with artificial freezing method applies.Intact section of jurisdiction side silt particle is cleared up after freezes body reaches intensity, disassembles trolley.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. shield tunnel gravity type sealing plugging structure, which is characterized in that including：
Twice churning plug wall, interval sealed set are filled with concrete in intact section of jurisdiction between twice churning plug wall
Or mortar filler；
Freezes body, the filler being set in the section of jurisdiction are interior the filler in section of jurisdiction is divided into be fully sealed two
Point.
2. shield tunnel gravity type sealing plugging structure as described in claim 1, which is characterized in that the freezes body is by more
The freezing pipe being set up in parallel side by side is formed by construction freezing method, and the freezing pipe is not more than along tunnel axis direction spacing
1.2m is not more than 1.4m, a diameter of 108mm~159mm of freezing pipe along tunnel lateral direction array pitch.
3. shield tunnel gravity type sealing plugging structure as claimed in claim 2, which is characterized in that the freezes body is along tunnel
Direction thickness at least 2m, short transverse is beyond section of jurisdiction vault and arch bottom outer profile at least 2m, and horizontal direction is extremely more than section of jurisdiction both sides
Few 1m.
4. shield tunnel gravity type sealing plugging structure as described in claim 1, which is characterized in that further include multiple auxiliary knots
Structure comprising pour punch hole and the steel pile casting that pipe and axis overlap, multiple holes that punch are encircleed along tunnel direction in the section of jurisdiction
Top is spaced and is arranged through section of jurisdiction, and the steel pile casting diameter is more than the bore dia that punches, and the bore dia that punches is more than described
Pour pipe diameter, the steel pile casting lower end is embedded in the section of jurisdiction, upper end flushes in ground, described to pour described in pipe passes vertically through
Punch hole.
5. shield tunnel gravity type sealing plugging structure as claimed in claim 4, which is characterized in that the hole that punches is along tunnel
Direction uniform intervals are arranged and spacing is not more than 8m, and the hole that punches only is arranged in each section in tunnel；The steel pile casting insertion
The height of section of jurisdiction is not less than 5cm and is not more than section of jurisdiction protective layer thickness.
6. shield tunnel gravity type sealing plugging structure as claimed in claim 4, which is characterized in that the concrete or mortar
Filler along pour pipe fill in steel pile casting to section of jurisdiction more than at least 1m, formation mortar or concrete plug.
7. shield tunnel gravity type sealing plugging structure as claimed in claim 4, which is characterized in that on the steel pile casting outer wall
Also integrally formed with a ring shape grouting layer, the upper end is concordant with steel pile casting upper end, lower end is higher than steel pile casting lower end, the slip casting
Layer annular one encloses uniform intervals and is provided with multiple injected holes, penetrates through the upper and lower side of the grouting layer, the steel pile casting lower end with
The annular barrier plate that can be slided up and down along steel pile casting outer wall is additionally provided on steel pile casting outer wall between the grouting layer lower end,
Diameter is more than the grouting layer diameter, and multiple L-type passages are provided in the barrier plate, and the upper end is a pair of with multiple injected holes one
It answers, side is penetrated through to outside barrier plate.
8. shield tunnel gravity type sealing plugging structure as claimed in claim 4, which is characterized in that steel pile casting inner wall edge
Its short transverse is arranged at intervals with multiple first location structures comprising along the multiple of steel pile casting inner wall circumferential direction uniform intervals setting
First baffle, is articulated with the steel pile casting inner wall and the side at the first baffle towards steel pile casting center is arcwall face, institute
It further includes positioning pipe to state supplementary structure, and the diameter of the positioning pipe is slightly larger than the diameter for pouring pipe, the arc of the first baffle
Face is interference fitted with the positioning pipe outer wall, and the positioning pipe outer wall is provided with multiple second location structures along its short transverse,
It includes multiple second baffles along positioning pipe outer wall circumferential direction uniform intervals setting, is articulated in the positioning pipe outer wall, institute
It states the first location structure and the second location structure corresponds, the first baffle is also corresponded with second baffle, described fixed
It is connected by drawstring between the neighbouring second baffle of position pipe outer wall same column, the length of the drawstring is equal to adjacent second gear
Spacing between plate is also connected with drawstring on the second baffle of the top.
9. shield tunnel gravity type sealing method for blocking, which is characterized in that include the following steps：
Step 1：Construction setting twice churning plug wall in intact section of jurisdiction；
Step 2：Multiple holes that punch are set on section of jurisdiction vault between twice churning plug wall；
Step 3：Spaced be staggered in hole that will punch is divided into two groups, and one of which punches hole jetting, another group of hole suction tube that punches
Mud mixture in piece after the completion of suction cleaning, then passes through hole casting concrete or the mortar filler into section of jurisdiction of punching；
Step 4：Freezing pipe is laid in filler and forms freezes body.
10. shield tunnel gravity type sealing method for blocking as claimed in claim 9, which is characterized in that the step 2 setting
It punches and has also carried out the setting of supplementary structure before hole, specifically include：
1) the section of jurisdiction vault between twice churning plug wall equidistantly drills, and drilling does not penetrate section of jurisdiction, and steel protects in boring procedure
Cylinder follows up and is embedded into the section of jurisdiction of drilling；
2) rotary jet strengthening or grouting and reinforcing are carried out in steel pile casting and section of jurisdiction contact ring periphery；
3) the lower electronic convolution drilling machine of submersible type or other trepanning drilling machines in steel pile casting form diameter less than steel shield at the top of section of jurisdiction
The hole that punches of cylinder；
4) pipe that pours that diameter is less than the hole that punches is transferred in steel pile casting, and carries out jetting or suction section of jurisdiction muddy water by pouring pipe
Mixture, and subsequently pour filler.
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| CN201810611777.XA CN108756955B (en) | 2018-06-14 | 2018-06-14 | Gravity type water-stopping blocking structure and method for shield tunnel |
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| CN201810611777.XA CN108756955B (en) | 2018-06-14 | 2018-06-14 | Gravity type water-stopping blocking structure and method for shield tunnel |
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| CN113605929A (en) * | 2021-07-12 | 2021-11-05 | 中交路桥建设有限公司 | Method for repairing stratum shield subway tunnel after accidental breakdown |
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