CN109404015A - A kind of vault band mould grouting construction process - Google Patents
A kind of vault band mould grouting construction process Download PDFInfo
- Publication number
- CN109404015A CN109404015A CN201811501428.9A CN201811501428A CN109404015A CN 109404015 A CN109404015 A CN 109404015A CN 201811501428 A CN201811501428 A CN 201811501428A CN 109404015 A CN109404015 A CN 109404015A
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- CN
- China
- Prior art keywords
- slip casting
- grouting pipe
- trolley
- grouting
- rpc
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
Abstract
The invention discloses a kind of vault band mould grouting construction process, belong to technical field of tunnel construction, poor, the operational procedure are as follows: install RPC Grouting Pipe that solves the problems, such as that vault band is molded into low efficiency when slurry is poured using secondary template trolley, safety；It records and checks RPC Grouting Pipe embedment length；Casting concrete simultaneously observes built-in slip casting pipe pulp situation；Slurries preparation；Slip casting machine is connect with trolley Grouting Pipe；Slip casting simultaneously observes pressure gauge, flowmeter, pore and end mould pulp；Judge whether end mould discharge standing paste or pressure are greater than 1.0MPa；Whole injected hole slip castings and end mould pulp；Terminate slip casting；Removal locating flange simultaneously closes injected hole.Efficiency of the vault with mould mortar depositing construction is improved, grouting with plunger and construction period is greatly reduced, ensure that grouting pressure can reach 1MPa, to improve the compactness of grouting of concrete, it is ensured that the safety of secondary lining.
Description
Technical field
The present invention relates to technical field of tunnel construction, are specifically related to a kind of vault band mould grouting construction process.
Background technique
With economic rapid development, Tunnel Engineering is the important component in road construction, the tunnel in Tunnel Engineering
When road secondary lining concrete is poured using secondary template trolley, since splash guard vault part generates air bag, concrete flowing
Property insufficient, filling concrete amount factors, the vault such as not enough can generate cavity, these cavities are not easy to find in casting process.
Lining construction due to the limitation of lining concrete, cause after two backings especially vault will appear hole,
Interlayer etc. comes to nothing area, when Concrete Filled leakiness, especially later-stage secondary slip casting, in order to avoid drilling, tubulature, note in lining cutting
Slurry filling, drilling easily damage splash guard, can bury percolating water hidden danger, it is desirable to provide a kind of vault band mould grouting construction process,
Grouting with plunger and construction period is greatly reduced, ensure that grouting pressure can reach 1MPa, to improve the slip casting of concrete
Compactness, it is ensured that the safety of secondary lining, it is intended to solve the above problems.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of vault band mould grouting construction process,
To solve the problems in above-mentioned background technique.
To achieve the above object, the invention provides the following technical scheme:
A kind of vault band mould grouting construction process, operational procedure are as follows:
RPC Grouting Pipe is installed；
It records and checks RPC Grouting Pipe embedment length；
Casting concrete simultaneously observes built-in slip casting pipe pulp situation；
Slurries preparation；
Slip casting machine is connect with trolley Grouting Pipe；
Slip casting simultaneously observes pressure gauge, flowmeter, pore and end mould pulp；
Judge whether end mould discharge standing paste or pressure are greater than 1.0MPa；
When greater than 1.0MPa, next injected hole slip casting is shifted to, otherwise, continues slip casting；
Whole injected hole slip castings and end mould pulp；
Terminate slip casting；
Removal locating flange simultaneously closes injected hole.
As a further solution of the present invention, specifically includes the following steps:
Step 1: lining trolley grouting borehole design
Slip casting hole number is designed according to lining trolley template length；4 injected holes are set in trolley, 4 injected holes are successively
For main injected hole, two injected holes and gas vent；
Simultaneously flange is welded and fixed in lining trolley top injected hole aperture；
Step 2: pre-buried RPC Grouting Pipe
After lining trolley installation positioning, before concreting, RPC Grouting Pipe is installed, checks circulation secondary lining concrete
Thickness；
RPC Grouting Pipe is vertically penetrated from mounting flange, splash guard is withstood in upper end, and records and penetrate mounting flange and trolley
The length L of interior RPC Grouting Pipe1, mounting flange and trolley formwork are with a thickness of L0, locating flange thickness and locating flange set
The sum of length of tube is L2, it is L that RPC Grouting Pipe, which stretches out locating flange casing length,3, L1+L2+L3It is reserved total to add up to RPC Grouting Pipe
Length L4；
L is recorded in RPC Grouting Pipe installation record sheet4Length, and L length is calculated, by the reserved total length L of each injected hole4
And embedment clear length L and related data charge to Grouting Pipe installation record sheet；
Locating flange is installed on mounting flange, and the RPC Grouting Pipe made is penetrated into locating flange, wherein cross is cut
Mouth end is held out against with splash guard, and connecting sleeve and fixed sleeving are installed in locating flange extension tube attached；
Step 3: grouting port concrete pulp observes and records
Grouting Pipe is embedded to be finished, and starts casting concrete, when vault concreting, observe each grouting port whether pulp,
It is aided with blunt nosed round bar when necessary and determines pulp situation in pipe, determines whether concrete reaches Grouting Pipe grout outlet position；Together
Step is built implementation Process to concrete arch top casting using vault end camera and is monitored, until each injected hole pulp and end mould coagulation
After soil is full, it is believed that concrete, which is basically completed, rushes to summit；
Vault concreting finishes, and vault concreting, which finishes, carries out vault slip casting；
Step 4: trolley slip casting connector
Slip casting connector includes connecting sleeve, only slurry ball valve, grouting pressure table, quick coupling and slip casting hose；
Step 5: slurrying
1) according to material mix proportion, every disk material amount and batched water are calculated, and uses dedicated water container；
2) blender is started, the injecting paste material of half is first added, starts blanking vibrating motor, whole mixs is then added
Water is further continued for that the other half injecting paste material is added, stirs 2~3min, keep slurry uniform；
3) cement slurry preparing barrel discharge gate is opened, so that slurry is quickly flowed out to slurry storing tank, is then shut off cement slurry preparing barrel discharge gate；
4) according to method circulating pulp-making 2), 3)；
Step 6: slip casting
1) after slurry is put into slurry storing tank, start grouting pump, after the water in tube body is all squeezed out, close grouting pump, row
Water out and the slurries for not meeting ratio requirement carry out centralized collection processing using special container；
2) Grouting Pipe tube head is promoted onto lining trolley, is connect with trolley filling adaptor, and slip casting hose is fixed to
On trolley；
3) start grouting pump, start slip casting, grouting sequence successively carries out slip casting by main injected hole Xiang Duanmo injected hole；
4) during slip casting, observation trolley upper pressure table and end mould pulp situation, if end mould circular arc highest point is leaked
Slurry, first stops grouting pump, and then proceed to slip casting to blocking at spillage in time, until end pulp slurry density and system
It is consistent in pulp grinder；It replaces to next injected hole, and so on；When slip casting, if pressure gauge is more than 1.0MPa at trolley, directly
Go to injected hole；Each injected hole in addition to gas vent is both needed to slip casting, but other hole slip castings are carried out during slip casting
When non-slip casting injected hole outflow when reaching the slurry of equal densities, hole closing, without slip casting；
(5) terminate slip casting；Each hole slip casting terminates, consistent in end mould highest point pulp slurry density and cement slurry preparing barrel, terminates note
Slurry；
(6) slip casting total amount, slip casting starting and end time are recorded；
(7) keep sample detection；It is sampled at pulper and trolley slip casting hose tube head respectively, detects slurry density；
Step 7: cleaning
1) injecting paste material being not used be withdrawn into dry place storage, and carry out isolation and it is moisture-proof；
2) there is pumping equipment in tunnel, tunnel-liner special slip casting machine, grouting pipe are cleaned in tunnel；Tunnel is without row
Drainage facility, equipment is drawn to designated position outside tunnel and carries out equipment cleaning；
3) after slurry initial set, slip casting connector is dismantled, and blocks RPC Grouting Pipe nozzle in time；
Step 8: reserved injected hole surfacecti proteon
Through geological radar or after tapping detection qualification, Grouting Pipe exsertion part is polished flat vault using angle grinder cutting.
As a further solution of the present invention, in step 1,4 injected holes, aperture 40mm, main note is arranged in 12m trolley
Starch circulation secondary lining concrete 60~100cm of closed end in pitch-row, gas vent is 100~150cm away from open trolley end mould, two
A injected hole is uniformly distributed in middle position.
As a further solution of the present invention, for the mounting flange using the mode that is fully welded, mounting flange connects bolt in mould
On the outside of plate, mounting flange is with a thickness of 1cm；Bolt is M22 plain bolt, bolt length 70mm；RPC Grouting Pipe top nozzle is cut
Cut cross mouth, depth 0.5cm, width 0.3cm.
As a further solution of the present invention, trolley end mould leak-proof measure are as follows: after trolley end mould is installed, paving on the inside of the mould of end
Plastic foil is hung, plastic foil routs up 10~20cm from end die tip outward；Holding mould monitoring device is that monitoring camera is arranged at the top of the mould of end
Head.
As a further solution of the present invention, RPC Grouting Pipe additional length is cut, and is penetrating lining cutting RPC slip casting tube top
End pipe mouth cuts cross mouth, depth 0.5cm, width 0.3cm；
The thickness L of vault lining cutting is the clear length for being embedded to RPC Grouting Pipe:
L=L4-L3-L2-L0
Wherein: L be RPC Grouting Pipe top between trolley backform upper surface at a distance from, i.e., RPC Grouting Pipe embedment lining cutting in
Clear length, unit are as follows: cm；
L0For mounting flange and trolley formwork thickness, unit are as follows: cm；
L1For the RPC slip casting length of tube penetrated in mounting flange and trolley, unit are as follows: cm；
L2For the sum of locating flange thickness and locating flange casing length, unit are as follows: cm；
L3Locating flange casing length, unit are as follows: cm are stretched out for RPC Grouting Pipe；
L4For reserved RPC Grouting Pipe total length, unit are as follows: cm.
As a further solution of the present invention, locating flange thickness 10mm, outer diameter 120mm, internal diameter 40mm, locating flange weldering
Meet the effective casing of RPC slip casting, casing length 50mm, internal diameter 38mm.
As a further solution of the present invention, slurry density is differed with the test value of laboratory must not exceed 1.5%, in platform
It samples at vehicle slip casting hose tube head, carries out compression strength and flexural strength test；It is close that 10 plate slip castings of every progress carry out a slurry
Degree is detected and is detected with conditional intensity, detects the compression strength and flexural strength of 28d intensity test piece.
In conclusion compared with the prior art, the invention has the following beneficial effects:
Vault band mould grouting construction process of the invention, it is easy to operate, it is easy for construction, by installation RPC Grouting Pipe and make
Standby slurries, slip casting, the sequence of operations for terminating slip casting, improve efficiency of the vault with mould mortar depositing construction, slip casting are greatly reduced
Process and construction period ensure that grouting pressure can reach 1MPa, to improve the compactness of grouting of concrete, it is ensured that two
The safety of secondary lining cutting.
In order to explain the structural features and functions of the invention more clearly, come with reference to the accompanying drawing with specific embodiment to this hair
It is bright to be described in detail.
Detailed description of the invention
Fig. 1 is the construction flow chart of invention.
Fig. 2 is injected hole arrangement schematic diagram in invention.
Fig. 3 is practical lining thickness calculating parameter schematic diagram in invention.
Fig. 4 is slip casting connector scheme of installation in invention.
Appended drawing reference: 1-RPC Grouting Pipe, 2- trolley formwork, 3- mounting flange, 4- locating flange, 5- fastening bolt, on 6-
Connection sleeve, 7- connecting sleeve, 8- lower joint sleeve cylinder, 9- grouting stop-valve door, 10- pressure gauge, 11- quick coupling, 12- slip casting are soft
Pipe, 14- injected hole, 15- gas vent, 16- trolley end mould, 17- built-in slip casting pipe, recycles two on 18- at 13- concrete pouring hole
Secondary lining concrete.
Specific embodiment
The following further describes the technical solution of the present invention in the following with reference to the drawings and specific embodiments.
It is shown in Figure 1, a kind of vault band mould grouting construction process, main operational procedure are as follows: installation RPC Grouting Pipe 1, note
1 embedment length of RPC Grouting Pipe is recorded and checks, casting concrete simultaneously observes built-in slip casting pipe pulp situation, slurries preparation, slip casting machine
It is connect with trolley Grouting Pipe, slip casting simultaneously observes pressure gauge 10, flowmeter, pore and end mould pulp, judges that standing paste is discharged in end mould
Or whether pressure is greater than 1.0MPa, when being greater than 1.0MPa, shifts to next 14 slip casting of injected hole, otherwise, continues slip casting, then,
Whole 14 slip castings of injected hole and end mould pulp, terminate slip casting, removal locating flange 4 simultaneously closes injected hole 14.
A kind of vault band mould grouting construction process, specifically includes the following steps:
Step 1: lining trolley injected hole 14 designs
According to 2 Design of length injected hole of lining trolley template, 14 quantity, referring to fig. 2 and shown in Fig. 4,12m trolley is arranged 4
Injected hole 14, aperture 40mm, 4 injected holes 14 successively for main injected hole (hole 1#), two injected holes 14 (hole 2#, the hole 3#),
15/ peep hole of gas vent (hole 4#)；Main injected hole (hole 1#) is away from upper circulation secondary lining concrete 60~100cm of closed end, row
15/ peep hole of stomata (hole 4#) is 100~150cm away from open trolley end mould 16, and injected hole 14 (hole 2#, the hole 3#) is in middle position
It is uniformly distributed.
It 14 aperture of injected hole and is welded and fixed flange 3 (for the first time) at the top of lining trolley, mounting flange 3 uses the side of being fully welded
Flange falls off when formula, mortar leakage prevention or slip casting.Mounting flange 3 connects bolt on the outside of template, and mounting flange 3 is with a thickness of 1cm；Spiral shell
Bolt is M22 plain bolt, bolt length 70mm；1 top nozzle of RPC Grouting Pipe cuts cross mouth, depth 0.5cm, and width is
0.3cm。
16 leak-proof measure of trolley end mould are as follows: after installing trolley end mould 16, paving hangs plastic foil on the inside of the mould of end, and plastic foil is from end
Die tip routs up 10~20cm outward, and spillage at the mould of end when other requisite measures being taken to prevent placing concrete or slip casting.
Holding mould monitoring device is that monitoring camera is arranged at the top of the mould of end, the installation of monitoring Grouting Pipe and filling concrete shape
State facilitates live operator on duty's timing monitoring lining concrete to rush to summit process.
Step 2: pre-buried RPC Grouting Pipe 1
After lining trolley installation positioning, before concreting, RPC Grouting Pipe 1 is installed, while it is mixed to check circulation secondary lining cutting
The thickness of solidifying soil 18.
It is shown in Figure 3, RPC Grouting Pipe 1 is vertically penetrated from mounting flange 3, splash guard is withstood in upper end, and records and penetrate
The length L of RPC Grouting Pipe 1 in mounting flange 3 and trolley1, mounting flange 3 and trolley formwork 2 are with a thickness of L0, locating flange 4
The sum of 4 casing length of thickness and locating flange is L2(ordinary circumstance L2=1cm+5cm=6cm), RPC Grouting Pipe 1 stretches out positioning
4 casing length of flange is L3(ordinary circumstance takes 2cm), L1+L2+L3It adds up to RPC Grouting Pipe 1 and reserves total length L4, cut RPC note
1 additional length of pipe is starched, and is penetrating 1 top nozzle of lining cutting RPC Grouting Pipe cutting cross mouth, depth 0.5cm, width 0.3cm.
The thickness L of vault lining cutting is the clear length for being embedded to RPC Grouting Pipe 1:
L=L4-L3-L2-L0
Wherein: L be 1 top of RPC Grouting Pipe between trolley backform upper surface at a distance from, i.e., RPC Grouting Pipe 1 be embedded to lining cutting in
Clear length, unit are as follows: cm；
L0For 2 thickness of mounting flange 3 and trolley formwork, unit are as follows: cm；
L1For 1 length of RPC Grouting Pipe penetrated in mounting flange 3 and trolley, unit are as follows: cm；
L2For the sum of 4 casing length of 4 thickness of locating flange and locating flange, unit are as follows: cm；
L34 casing length of locating flange, unit are as follows: cm are stretched out for RPC Grouting Pipe 1；
L4For reserved 1 total length of RPC Grouting Pipe, unit are as follows: cm.
It is installed in record sheet in RPC Grouting Pipe 1 and records L4Length, and calculate L length.By the reserved overall length of each injected hole 14
Spend L4And embedment clear length L and related data charge to Grouting Pipe installation record sheet.
Locating flange 4 is installed on mounting flange 3, and the RPC Grouting Pipe 1 made is penetrated into locating flange 4, wherein ten
Word cut ends are held out against with splash guard.Connecting sleeve 7 and fixed sleeving are installed in 4 extension tube attached of locating flange.
Step 3: grouting port concrete pulp observes and records
Grouting Pipe is embedded to be finished, and casting concrete can be started.When vault concreting, observe whether each grouting port goes out
Slurry is aided with blunt nosed round bar and determines pulp situation in pipe, when necessary to determine whether concrete reaches Grouting Pipe grout outlet position；
It is synchronous that implementation Process monitoring is built to concrete arch top casting using vault end camera, until each 14 pulp of injected hole and end mould
After concrete is full, it is believed that concrete, which is basically completed, rushes to summit.
Vault concreting finishes, and carries out cleaning and clogging-preventing measures to grouting port in time, avoids jam of grouting pipe.Vault
Concreting, which finishes, can carry out vault slip casting (finishing 12h earlier than concreting).
Step 4: trolley slip casting connector
Slip casting connector includes connecting sleeve 7, only starches ball valve, grouting pressure table 10, quick coupling 11 and slip casting hose 12,
Connection type is shown in Fig. 4；Locating flange 4 thickness 10mm, outer diameter 120mm, internal diameter 40mm, locating flange 4 weld RPC Grouting Pipe 1 and use
Casing, casing length 50mm, internal diameter 38mm.
Step 5: slurrying
(1) according to material mix proportion, every disk material amount and batched water are calculated, and uses dedicated water container.
(2) blender is started, the injecting paste material of half is first added, starts blanking vibrating motor, whole mix then is added
Heshui is further continued for that the other half injecting paste material is added, stirs 2~3min (or in accordance with equipment operation instruction), keep slurry uniform.
(3) cement slurry preparing barrel discharge gate is opened, so that slurry is quickly flowed out to slurry storing tank, is then shut off cement slurry preparing barrel discharge gate.
(4) according to the method circulating pulp-making of (2), (3).
Step 6: slip casting
(1) after slurry is put into slurry storing tank, start grouting pump, after the water in tube body is all squeezed out, close grouting pump.Row
Water out and the slurries for not meeting ratio requirement carry out centralized collection processing using special container.
(2) Grouting Pipe tube head is promoted onto lining trolley, is connect with trolley filling adaptor.And it is slip casting hose 12 is fixed
Onto trolley.
(3) start grouting pump, start slip casting.Grouting sequence successively carries out slip casting by main injected hole Xiang Duanmo injected hole.
(4) during slip casting, observation trolley upper pressure table 10 and end mould pulp situation.If end mould circular arc highest point
Spillage first stops grouting pump, and then proceedes to slip casting to blocking at spillage in time, until end pulp slurry density with
It is consistent in pulper.It replaces to next injected hole 14, and so on.When slip casting, if pressure gauge 10 is more than at trolley
1.0MPa directly goes to injected hole 14.Each injected hole 14 in addition to the hole 4# is both needed to slip casting, but during slip casting into
When the outflow of injected hole 14 of non-slip casting when the other hole slip castings of row reaches the slurry of equal densities, which can be closed, without note
Slurry.
(5) terminate slip casting.Each hole slip casting terminates, consistent in end mould highest point pulp slurry density and cement slurry preparing barrel, terminates note
Slurry.
(6) slip casting total amount, slip casting starting and end time are recorded.
(7) keep sample detection.It is sampled at 12 tube head of pulper and trolley slip casting hose respectively, detects slurry density.
Slurry density is differed with the test value of laboratory must not exceed 1.5%.It samples at 12 tube head of trolley slip casting hose, carries out resistance to compression
Intensity and flexural strength test.10 plate slip castings of every progress carry out a slurry density detection and detect with conditional intensity, detect 28d
The compression strength and flexural strength of intensity test piece.
Step 7: cleaning
(1) injecting paste material being not used is withdrawn into dry place storage, and takes necessary isolation and moisture preventive measure.
(2) there is pumping equipment in tunnel, tunnel-liner special slip casting machine, grouting pipe can be cleaned in tunnel；Tunnel
It is undrained, equipment is drawn to designated position outside tunnel and carries out equipment cleaning.
(3) after slurry initial set, slip casting connector is dismantled, and blocks 1 nozzle of RPC Grouting Pipe in time.
Step 8: reserved 14 surfacecti proteon of injected hole
Through geological radar or after tapping detection qualification, Grouting Pipe exsertion part is polished flat vault using angle grinder cutting.
It should be noted that:
One, it is examined before construction
(1) RPC Grouting Pipe 1, the work certificate of microdilatancy grout material, factory quality inspection list and third party's examining report are coped with
It marches into the arena verification.
(2) entry test should be carried out to RPC Grouting Pipe 1, microdilatancy grout material.The inspection project of RPC Grouting Pipe 1 is outer
Diameter, internal diameter, pipe thickness, tube body compression strength, tube body flexural strength；The inspection project of microdilatancy grout material is fineness, mix
Object apparent density goes out machine fluidity, 90min fluidity retention, separating degree, bleeding rate, plastic expansion rate, compression strength
(12h, 1d, 28d), flexural strength (12h, 1d, 28d), for 24 hours bond strength (7d, 28d), microdilatancy grout material are in conjunction with RPC pipe
Property.Inspection result should meet the related request of this technology requirement.
Two, work progress is examined
(1) routine check should be carried out to RPC Grouting Pipe 1, microdilatancy binder.The inspection project of RPC Grouting Pipe 1 is outer
Diameter, internal diameter, pipe thickness；The inspection project of microdilatancy grout material is fineness, mixture apparent density, goes out machine fluidity, 90min
Fluidity retention, plastic expansion rate, compression strength (28d), flexural strength (28d).Every 10 plate of slip casting is to microdilatancy grout material
Once examined with the 28d compression strength of condition, flexural strength.Inspection result should meet the related request of this technology requirement.
(2) connectivity and integrality of RPC Grouting Pipe 1 should be checked in work progress, if fractureing or blocking, taken effectively
Measure is resolved.
(3) concrete castability of RPC Grouting Pipe 1 should be checked in work progress, if binder can be injected.Blocking is failed to inject
The injected hole 14 of microdilatancy grout material should give record.
Three, it is examined after constructing
Being carried out non-destructive testing using geological radar (when to lining thickness or vacant analysis result with suspicion, can be used office
The method of portion's drill core breakage is checked, and is repaired in time after review to damaged part), inspection result should meet design
It is required that.
Four, material requirements
(1) high-pressure slip-casting pipe uses clad steel fiber tube, and bearing capacity is not less than 10MPa, preferably uses sectional pipe, every section 4~
Quick coupling 11 is preferably used to connect between 6m, Guan Yuguan.
(2) it rushes to summit, be vented and the pre-buried RPC Grouting Pipe 1 of slip casting for observing concrete, specification and mechanical property are answered
Meet the regulation of table 1.
The technical requirements of the pre-buried RPC Grouting Pipe 1 of table 1
Remarks: Grouting Pipe is often 600mm with length, when needing to lengthen, uses extended type pipe.
(2) microdilatancy slip casting slurry body basic performance
The microdilatancy slip casting slurry body basic performance indices of preparation should meet the regulation of table 2.
2 microdilatancy slip casting slurry body performance requirement of table
Remarks: microdilatancy grout material ratio of water to material is according to recommendation ratio of water to material.
The technical principle of the invention is described above in combination with a specific embodiment, is only the preferred embodiment of the present invention.This
The protection scope of invention is not limited merely to above-described embodiment, and all technical solutions belonged under thinking of the present invention belong to the present invention
Protection scope.Those skilled in the art, which does not need to pay for creative labor, can associate other specific realities of the invention
Mode is applied, these modes will fall within the scope of protection of the present invention.
Claims (8)
1. a kind of vault band mould grouting construction process, which is characterized in that its operational procedure are as follows:
It installs RPC Grouting Pipe (1)；
It records and checks RPC Grouting Pipe (1) embedment length；
Casting concrete simultaneously observes built-in slip casting pipe pulp situation；
Slurries preparation；
Slip casting machine is connect with trolley Grouting Pipe；
Slip casting simultaneously observes pressure gauge (10), flowmeter, pore and end mould pulp；
Judge whether end mould discharge standing paste or pressure are greater than 1.0MPa；
When greater than 1.0MPa, next injected hole (14) slip casting is shifted to, otherwise, continues slip casting；
Whole injected hole (14) slip castings and end mould pulp；
Terminate slip casting；
Removal locating flange (4) simultaneously closes injected hole (14).
2. vault band mould grouting construction process according to claim 1, which is characterized in that specifically includes the following steps:
Step 1: lining trolley injected hole (14) designs
According to lining trolley template (2) Design of length injected hole (14) quantity；In trolley, 4 injected holes (14), 4 slip castings are set
Hole is successively main injected hole, two injected holes (14) and gas vent (15)；
Simultaneously flange (3) are welded and fixed in lining trolley top injected hole (14) aperture；
Step 2: pre-buried RPC Grouting Pipe (1)
After lining trolley installation positioning, before concreting, installs RPC Grouting Pipe (1), check circulation secondary lining concrete
(18) thickness；
It is vertically penetrated at mounting flange (3) RPC Grouting Pipe (1), splash guard is withstood in upper end, and records and penetrate mounting flange (3)
And the length L of the RPC Grouting Pipe (1) in trolley1, mounting flange (3) and trolley formwork (2) are with a thickness of L0, locating flange (4)
The sum of thickness and locating flange (4) casing length are L2, it is L that RPC Grouting Pipe (1), which stretches out locating flange (4) casing length,3, L1
+L2+L3It adds up to RPC Grouting Pipe (1) and reserves total length L4；
L is recorded in RPC Grouting Pipe (1) installation record sheet4Length, and L length is calculated, by the reserved overall length of each injected hole (14)
Spend L4And embedment clear length L and related data charge to Grouting Pipe installation record sheet；
Locating flange (4) are installed on mounting flange (3), and the RPC Grouting Pipe (1) made is penetrated into locating flange (4),
Middle cross recess end is held out against with splash guard, and connecting sleeve (7) and fixed sleeving are installed in locating flange (4) extension tube attached；
Step 3: grouting port concrete pulp observes and records
Grouting Pipe is embedded to be finished, and starts casting concrete, when vault concreting, observe each grouting port whether pulp, it is necessary
When be aided with blunt nosed round bar determine manage in pulp situation, to determine whether concrete reaches Grouting Pipe grout outlet position；Synchronize benefit
Implementation Process monitoring is built to concrete arch top casting with vault end camera, until each injected hole (14) pulp and end mould coagulation
After soil is full, it is believed that concrete, which is basically completed, rushes to summit；
Vault concreting finishes, and vault concreting, which finishes, carries out vault slip casting；
Step 4: trolley slip casting connector
Slip casting connector includes connecting sleeve (7), only slurry ball valve, grouting pressure table (10), quick coupling (11) and slip casting hose
(12)；
Step 5: slurrying
1) according to material mix proportion, every disk material amount and batched water are calculated, and uses dedicated water container；
2) blender is started, the injecting paste material of half is first added, starts blanking vibrating motor, whole mixing waters is then added,
It is further continued for that the other half injecting paste material is added, stirs 2~3min, keep slurry uniform；
3) cement slurry preparing barrel discharge gate is opened, so that slurry is quickly flowed out to slurry storing tank, is then shut off cement slurry preparing barrel discharge gate；
4) according to method circulating pulp-making 2), 3)；
Step 6: slip casting
1) after slurry is put into slurry storing tank, start grouting pump, after the water in tube body is all squeezed out, close grouting pump, discharge
Water and the slurries for not meeting ratio requirement carry out centralized collection processing using special container；
2) Grouting Pipe tube head is promoted onto lining trolley, is connect with trolley filling adaptor, and slip casting hose (12) is fixed to
On trolley；
3) start grouting pump, start slip casting, grouting sequence successively carries out slip casting by main injected hole Xiang Duanmo injected hole；
4) during slip casting, trolley upper pressure table (10) He Duanmo pulp situation is observed, if end mould circular arc highest point is leaked
Slurry, first stops grouting pump, and then proceed to slip casting to blocking at spillage in time, until end pulp slurry density and system
It is consistent in pulp grinder；It replaces to next injected hole (14), and so on；When slip casting, if pressure gauge (10) is more than at trolley
1.0MPa directly goes to injected hole (14)；Each injected hole (14) in addition to gas vent (15) is both needed to slip casting, but is infusing
When injected hole (14) outflow of non-slip casting when carrying out other hole slip castings during slurry reaches the slurry of equal densities, hole closing,
Without slip casting；
(5) terminate slip casting；Each hole slip casting terminates, consistent in end mould highest point pulp slurry density and cement slurry preparing barrel, terminates slip casting；
(6) slip casting total amount, slip casting starting and end time are recorded；
(7) keep sample detection；It is sampled at pulper and trolley slip casting hose (12) tube head respectively, detects slurry density；
Step 7: cleaning
1) injecting paste material being not used be withdrawn into dry place storage, and carry out isolation and it is moisture-proof；
2) there is pumping equipment in tunnel, tunnel-liner special slip casting machine, grouting pipe are cleaned in tunnel；Tunnel is set without draining
It applies, equipment is drawn to designated position outside tunnel and carries out equipment cleaning；
3) after slurry initial set, slip casting connector is dismantled, and blocks RPC Grouting Pipe (1) nozzle in time；
Step 8: reserved injected hole (14) surfacecti proteon
Through geological radar or after tapping detection qualification, Grouting Pipe exsertion part is polished flat vault using angle grinder cutting.
3. vault band mould grouting construction process according to claim 2, which is characterized in that in step 1, the setting of 12m trolley
4 injected holes (14), aperture 40mm, main injected hole is away from upper circulation secondary lining concrete 60~100cm of closed end, gas vent
It (15) is 100~150cm away from open trolley end mould (16), two injected holes (14) are uniformly distributed in middle position.
4. vault band mould grouting construction process according to claim 3, which is characterized in that the mounting flange (3) uses
It is fully welded mode, mounting flange (3) connects bolt on the outside of template, and mounting flange (3) is with a thickness of 1cm；Bolt is the common spiral shell of M22
Bolt, bolt length 70mm；RPC Grouting Pipe (1) top nozzle cuts cross mouth, depth 0.5cm, width 0.3cm.
5. vault band mould grouting construction process according to claim 2, which is characterized in that trolley end mould (16) leak-proof measure
Are as follows: after installing trolley end mould (16), paving hangs plastic foil on the inside of the mould of end, and plastic foil routs up 10~20cm from end die tip outward；
Holding mould monitoring device is that monitoring camera is arranged at the top of the mould of end.
6. vault band mould grouting construction process according to claim 2, which is characterized in that it is extra to cut RPC Grouting Pipe (1)
Length, and penetrating lining cutting RPC Grouting Pipe (1) top nozzle cutting cross mouth, depth 0.5cm, width 0.3cm；
The thickness L of vault lining cutting is the clear length for being embedded to RPC Grouting Pipe (1):
L=L4-L3-L2-L0
Wherein: L be RPC Grouting Pipe (1) top between trolley backform upper surface at a distance from, i.e., RPC Grouting Pipe (1) embedment lining cutting in
Clear length, unit are as follows: cm；
L0For mounting flange (3) and trolley formwork (2) thickness, unit are as follows: cm；
L1For RPC Grouting Pipe (1) length penetrated in mounting flange (3) and trolley, unit are as follows: cm；
L2For the sum of locating flange (4) thickness and locating flange (4) casing length, unit are as follows: cm；
L3Locating flange (4) casing length, unit are as follows: cm are stretched out for RPC Grouting Pipe (1)；
L4For reserved RPC Grouting Pipe (1) total length, unit are as follows: cm.
7. vault band mould grouting construction process according to claim 2, which is characterized in that locating flange (4) thickness 10mm,
Outer diameter 120mm, internal diameter 40mm, locating flange (4) weld RPC Grouting Pipe (1) and use casing, casing length 50mm, internal diameter 38mm.
8. vault band mould grouting construction process according to claim 2, which is characterized in that the survey of slurry density and laboratory
Examination value difference must not exceed 1.5%, sample at trolley slip casting hose (12) tube head, carry out compression strength and flexural strength examination
It tests；10 plate slip castings of every progress carry out a slurry density detection and detect with conditional intensity, detect the pressure resistance of 28d intensity test piece
Degree and flexural strength.
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| CN112573876A (en) * | 2020-12-14 | 2021-03-30 | 中交一公局集团有限公司 | Pressure injection type steel fiber concrete and application thereof |
| CN112593978A (en) * | 2020-12-04 | 2021-04-02 | 浙大城市学院 | Secondary lining vault anti-disengaging device and construction method |
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| CN112302685B (en) * | 2020-10-29 | 2023-02-28 | 四川港航建设工程有限公司 | Tunnel lining vault belt mold grouting system and construction method |
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| CN113700504A (en) * | 2021-09-08 | 2021-11-26 | 安徽理工大学 | Tunnel lining pre-buried grouting pipeline system and grouting method thereof |
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Application publication date: 20190301 |