CN103912289B - Tunnel grouting model testing divides order sublevel grouting device and using method thereof - Google Patents
Tunnel grouting model testing divides order sublevel grouting device and using method thereof Download PDFInfo
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Abstract
The invention discloses a kind of tunnel grouting model testing and divide order sublevel grouting device, comprise the two segmenting slip casting devices that front and back are arranged, wherein a pair segmenting slip casting device is corresponding to the wall rock grouting reinforcing area after tunnel excavation, and another corresponds to the advanced curtain-grouting reinforcing area before tunnel excavation to segmenting slip casting device; Each segmenting slip casting device all comprises a vertical Grouting Pipe, Grouting Pipe is parallel with three corresponding with the advanced curtain-grouting reinforcing area before the wall rock grouting reinforcing area after tunnel excavation or tunnel excavation respectively slip casting flexible pipes, be provided with a slip casting separator in Grouting Pipe between every two slip casting flexible pipes, the import of Grouting Pipe is connected with grouting pump.The present invention also discloses the using method of this device.Advanced curtain-grouting before wall rock grouting reinforcing after the present invention can realize tunnel excavation can realize again tunnel excavation is reinforced, and realizes tunnel surrounding grouting and reinforcing equably, with low cost, simple structure when substantially not affecting force-bearing of surrounding rock mass.
Description
Technical field
The present invention relates to a kind of slip casting modeling techniques, especially a kind of tunnel grouting model testing divides order sublevel grouting device and using method thereof.
Background technology
At present, in weak water rich strata during tunneling, often there is the problems such as surrouding rock deformation is excessive, water percolating capacity is large, gushing water even also likely occurs and to dash forward mud accident.The main weak rich water country rock of grouting method Strengthening Tunnel that adopts is to make tunnel smoothly by this stratum at present.Tunnel grouting model testing can be studied the Diffusion Law of grouting serous fluid in tunnel surrounding, analyze grouting consolidation effect and grouting and reinforcing rock stability, is new problem and research direction during tunnel safety is built.Tunnel grouting model testing, particularly curtain-grouting model testing, before being limited by, the curtain hole-drilling system of model testing does not have research, and test is difficult to carry out.
In tunnel grouting model testing, require that the Grouting Pipe of arranging does not affect the Stress relieving of surrounding rocks process in tunnel excavation process, and Strengthening Tunnel peripheral rock equably can be realized.Current Grouting Pipe method for arranging cannot meet this requirement.According to the method for arranging of hard Grouting Pipe pre-buried before tunnel excavation, the Grouting Pipe of hard can bear part surrouding rock stress in tunnel excavation process, hinders surrouding rock deformation, has a strong impact on tunnel excavation experimental result.According to the method inserting hard Grouting Pipe after tunnel excavation again, this method can very big disturbance tunnel surrounding, changes surrouding rock stress state.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of tunnel grouting model testing is provided to divide order sublevel grouting device and using method thereof, advanced curtain-grouting before wall rock grouting reinforcing after it can realize tunnel excavation can realize again tunnel excavation is reinforced, realize when substantially not affecting force-bearing of surrounding rock mass tunnel surrounding grouting and reinforcing equably, this device has the advantages such as with low cost, simple structure.
For achieving the above object, the present invention adopts following technical proposals:
A kind of tunnel grouting model testing divides order sublevel grouting device, comprise the two segmenting slip casting devices that front and back are arranged, wherein a pair segmenting slip casting device is corresponding to the wall rock grouting reinforcing area after tunnel excavation, and another corresponds to the advanced curtain-grouting reinforcing area before tunnel excavation to segmenting slip casting device; Each segmenting slip casting device all comprises a vertical Grouting Pipe, Grouting Pipe is parallel with three corresponding with the advanced curtain-grouting reinforcing area before the wall rock grouting reinforcing area after tunnel excavation or tunnel excavation respectively slip casting flexible pipes, be provided with a slip casting separator in Grouting Pipe between every two slip casting flexible pipes, the import of Grouting Pipe is connected with grouting pump;
Described slip casting separator is the thin rounded flakes of marginal belt sawtooth, the diameter of thin rounded flakes is identical with the external diameter of Grouting Pipe, Grouting Pipe end is inserted in after being bent by thin slice sawtooth, and utilize bonding agent both to be adhesively fixed, the Grouting Pipe of bonding slip casting separator is connected by joint with the Grouting Pipe of non-caked slip casting separator, thus fixing slip casting separator.
Described Grouting Pipe is PVC material, and Grouting Pipe lower port is connected with steel fiber tube by PVC box cupling, and steel fiber tube passes base plate and is welded to connect with base plate.
Described steel fiber tube lower end is connected with grouting pipeline by movable joint, and grouting pipeline is connected with grouting pump, and grouting pipeline is provided with valve.
The aluminum sheet of described thin rounded flakes to be thickness be 0.23mm, this aluminum sheet can bear the grouting pressure of 1MPa, meets the requirement of model testing to grouting pressure completely.
Described slip casting flexible pipe adopts the plastic pipe of softwood matter to make, and on flexible pipe, interval arranges the slurry mouth that overflows, and slip casting flexible pipe is connected by PVC reducing with Grouting Pipe.
Two relative slip casting flexible pipes are arranged on the same line, and the two segmenting slip casting devices arranged front and back totally 12 slip casting flexible pipes are that positive six prisms are arranged centered by tunnel.
Tunnel grouting model testing divides a using method for order sublevel grouting device, and step is as follows:
Step one: make slip casting separator, aluminum sheet is cut into the thin rounded flakes of band sawtooth, the diameter of thin rounded flakes is identical with the external diameter of PVC Grouting Pipe, PVC Grouting Pipe end is inserted in after being bent by aluminum sheet sawtooth, and utilize PVC bonding agent both to be adhesively fixed, the PVC Grouting Pipe of bonding slip casting separator is connected by PVC joint with the PVC Grouting Pipe of non-caked slip casting separator, thus fixing slip casting separator;
Step 2: require the number determining segmenting slip casting device according to experimental design, if the advanced curtain-grouting only carried out before tunnel excavation or the wall rock grouting after only carrying out tunnel excavation are reinforced, need 2 segmenting slip casting devices, if carry out two kinds of grouting and reinforcings simultaneously, need 4 segmenting slip casting devices; Require to determine PVC Grouting Pipe length and slip casting hose length according to experimental design; And slip casting separator, PVC Grouting Pipe and slip casting flexible pipe are assembled into segmenting slip casting device;
Step 3: segmenting slip casting device is connected with the steel fiber tube on pattern board by PVC box cupling, and carries out filler
Step 4: when tunnel excavation to half, experimentally requires to carry out slip casting to one of them segmenting slip casting device, connects relevant grouting pipeline, opens grouting pump and valve carries out slip casting, terminates slip casting during slip casting ending standard to be achieved;
Step 5: after slurry consolidation, take movable joint apart and destroy slip casting separator by long drill bit, use pressure flush of water afterwards, join dependency pipeline carries out slip casting next time, until third time slip casting complete after stopping slip casting;
Step 6: after segmenting slip casting device has carried out three slip casting, experimentally requires to carry out slip casting to next segmenting slip casting device, each segmenting slip casting device slip casting 3 times;
Step 7: slip casting completes, carries out form removal work.
The present invention includes 4 segmenting slip casting devices, segmenting slip casting device is made up of PVC Grouting Pipe, slip casting separator, slip casting flexible pipe and other PVC component, and all PVC components all use PVC bonding adhesive to connect.Wall rock grouting after wherein a pair segmenting slip casting device is used for tunnel excavation is reinforced, and another is used for the advanced curtain-grouting before tunnel excavation to segmenting slip casting device and reinforces.Each segmenting slip casting device inside arranges 2 slip casting separators and 3 slip casting flexible pipes.Segmenting slip casting device is connected with steel fiber tube by PVC box cupling, and steel fiber tube is through base plate and with base plate by being welded to connect.
The material of slip casting separator is common aluminum sheet, shape is the thin rounded flakes of band sawtooth, the diameter of thin rounded flakes is identical with the external diameter of PVC Grouting Pipe, PVC Grouting Pipe end is inserted in after being bent by aluminum sheet sawtooth, and utilize PVC bonding agent both to be adhesively fixed, the PVC Grouting Pipe of bonding slip casting separator is connected by PVC joint with the PVC Grouting Pipe of non-caked slip casting separator, thus fixing slip casting separator.In slip casting process, slip casting separator can bear grouting pressure and keep stable, plays the effect of separating slip casting, but utilizes long drill bit easily can destroy aluminum sheet.The maximum grouting pressure that slip casting separator can bear is relevant to the thickness of aluminum sheet, and the aluminum sheet that 0.23mm is thick can bear the grouting pressure of 1MPa, meets the requirement of model testing to grouting pressure completely.
Slip casting flexible pipe adopts the plastic pipe of softwood matter to make, and on flexible pipe, interval arranges the slurry mouth that overflows, and slip casting flexible pipe is connected by PVC reducing with PVC Grouting Pipe.Slip casting flexible pipe does not have enabling capabilities, does not impact the Stress relieving of surrounding rocks process in tunnel excavation process.Every two slip casting flexible pipes are arranged on the same line, 12 slip casting flexible pipes are that positive six prisms are arranged centered by tunnel, by the spacing regulating PVC Grouting Pipe length d2, d3 changes adjacent slip casting flexible pipe, tunnel grouting segment length can be changed by adjustment slip casting hose length d1.By increasing slip casting separator number and the slip casting flexible pipe number of each segmenting slip casting device, encryption can be realized and arrange slip casting flexible pipe.
In slip casting process, experimentally require to carry out slip casting to one of them segmenting slip casting device, slurries cannot pass through slip casting separator, can only enter into stratum by the slip casting flexible pipe before slip casting separator, after slurry consolidation, noted the slip casting flexible pipe of slurry also by shutoff.Utilize long drill bit destroy slip casting separator and carry out next section of slip casting, the slip casting flexible pipe before the slip casting separator that slurries are never destroyed enters stratum, and twice slip casting enters adjacent stratum respectively, thus realizes segmenting slip casting from down to up.
The invention has the beneficial effects as follows, advanced curtain-grouting before wall rock grouting reinforcing after technique scheme can realize tunnel excavation can realize again tunnel excavation is reinforced, realize when substantially not affecting force-bearing of surrounding rock mass tunnel surrounding grouting and reinforcing equably, this device has the advantages such as with low cost, simple structure.
The advanced curtain-grouting that 1, can simultaneously realize before the reinforcing of the wall rock grouting after tunnel excavation and tunnel excavation is reinforced;
2, in tunnel excavation process, slip casting flexible pipe does not affect tunnel surrounding stress release and sends out process, realizes when not affecting force-bearing of surrounding rock mass the even grouting and reinforcing of country rock;
3, slip casting segment length can be regulated by regulating slip casting hose length, by regulating segmenting slip casting device size adjusting Grouting Pipe number;
4, with low cost, the ease of assembly of PVC component used.
Accompanying drawing explanation
Fig. 1 is a point order sublevel grouting device elevation;
Fig. 2 is a point order sublevel grouting device lateral view;
Fig. 3 is a point order sublevel grouting device top view;
Fig. 4 (a), Fig. 4 (b) are respectively slip casting separator detail structure chart;
Fig. 5 is slip casting hose construction figure;
Fig. 6 is tunnel grouting model testing slip casting schematic diagram;
Fig. 7 is the wall rock grouting reinforcing area side view after tunnel excavation;
Fig. 8 is the advanced curtain-grouting reinforcing area side view before tunnel excavation;
1---PVC joint, 2---PVC Grouting Pipe, 3---PVC elbow, 4---PVC threeway, 5---PVC reducing, 6---PVC box cupling, 7---slip casting separator, 8---aluminum sheet, 9---sawtooth, 10---tunnel, 11---steel fiber tube, 12---movable joint, 13---slip casting flexible pipe, 14---overflow slurry mouth, 15---base plate, 16---grouting pump, 17---valve, 18---grouting pipeline, 19---the wall rock grouting reinforcing area after tunnel excavation, 20---advanced curtain-grouting reinforcing area, 21---tunnel face, 22---tunneling profile, 23---model testing border.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As Figure 1-Figure 8, be applicable to point order sublevel grouting device of tunnel grouting model testing, it comprises 4 segmenting slip casting devices, segmenting slip casting device is made up of PVC Grouting Pipe 2, slip casting separator 7, slip casting flexible pipe 13 and other PVC component (as PVC elbow 3 PVC threeway 4), and all PVC components all use PVC bonding adhesive to connect.Wherein a pair segmenting slip casting device is for the wall rock grouting reinforcing area 19 after tunnel excavation, and another is used for the advanced curtain-grouting reinforcing area 20 before tunnel excavation to segmenting slip casting device.Each segmenting slip casting device inside arranges 2 slip casting separators 7 and 3 slip casting flexible pipes 13.Segmenting slip casting device is connected with steel fiber tube 11 by PVC box cupling 6, and steel fiber tube 11 passes base plate 15 and is welded to connect with base plate 15.Steel fiber tube 11 lower end is connected with grouting pipeline 18 by movable joint 12, and grouting pipeline 18 is connected with grouting pump 16, and grouting pipeline 18 is provided with valve 17.
The material of slip casting separator 7 is common aluminum sheet 8, shape is the thin rounded flakes of band sawtooth 9, the diameter of thin rounded flakes is identical with the external diameter of PVC Grouting Pipe 2, PVC Grouting Pipe 2 end is inserted in after being bent by aluminum sheet sawtooth 9, and utilize PVC bonding agent both to be adhesively fixed, the PVC Grouting Pipe 2 of bonding slip casting separator 7 is connected by PVC joint 1 with the PVC Grouting Pipe 2 of non-caked slip casting separator 7, thus fixing slip casting separator 7.In slip casting process, slip casting separator 7 can bear grouting pressure and keep stable, plays the effect of separating slip casting, but utilizes long drill bit can easily destroy aluminum sheet 8.The maximum grouting pressure that slip casting separator 7 can bear is relevant to the thickness of aluminum sheet 8, and the aluminum sheet 8 that 0.23mm is thick can bear the grouting pressure of 1MPa, meets the requirement of model testing to grouting pressure completely.
Slip casting flexible pipe 13 adopts the plastic pipe of softwood matter to make, and on flexible pipe, interval arranges the slurry mouth 14 that overflows, and slip casting flexible pipe 13 is connected by PVC reducing 5 with PVC Grouting Pipe 2.Slip casting flexible pipe 13 does not have enabling capabilities, does not impact the Stress relieving of surrounding rocks process in tunnel 10 digging process.Every two slip casting flexible pipes 13 are arranged on the same line, 12 slip casting flexible pipes 13 are arranged centered by tunnel 10 in positive six prisms, by the spacing regulating PVC Grouting Pipe 2 length d2, d3 changes adjacent slip casting flexible pipe 13, tunnel grouting segment length can be changed by adjustment slip casting hose length d1.By increasing slip casting separator 7 number and the slip casting flexible pipe number of each segmenting slip casting device, encryption can be realized and arrange slip casting flexible pipe.
In slip casting process, experimentally require to carry out slip casting to one of them segmenting slip casting device, slurries cannot pass through slip casting separator 7, can only enter into stratum by the slip casting flexible pipe 13 before slip casting separator, after slurry consolidation, noted the slip casting flexible pipe 13 of slurry also by shutoff.Utilize long drill bit destroy slip casting separator and carry out next section of slip casting, the slip casting flexible pipe 13 before the slip casting separator 7 that slurries are never destroyed enters stratum, and twice slip casting enters adjacent stratum respectively, thus realizes segmenting slip casting from down to up.
As Figure 6-Figure 8, label 21 represents tunnel face, and 22 represent tunneling profile, and 23 represent model testing border.
Be applicable to point order sublevel grouting device using method of tunnel grouting model testing,
Step one: make slip casting separator 7, aluminum sheet is cut into the thin rounded flakes of band sawtooth, the diameter of thin rounded flakes is identical with the external diameter of PVC Grouting Pipe 2, PVC Grouting Pipe 2 end is inserted in after being bent by aluminum sheet sawtooth, and utilize PVC bonding agent both to be adhesively fixed, the PVC Grouting Pipe 2 of bonding slip casting separator 7 is connected by PVC joint 1 with the PVC Grouting Pipe 2 of non-caked slip casting separator 7, thus fixing slip casting separator 7;
Step 2: require the number determining segmenting slip casting device according to experimental design, if the advanced curtain-grouting only carried out before tunnel excavation or the wall rock grouting after only carrying out tunnel excavation are reinforced, need 2 segmenting slip casting devices, if carry out two kinds of grouting and reinforcings simultaneously, need 4 segmenting slip casting devices.Require to determine PVC Grouting Pipe 2 length and slip casting flexible pipe 13 length according to experimental design.And slip casting separator 7, PVC Grouting Pipe 2, slip casting flexible pipe 13 are become segmentation slurry casting machine with other PVC component installaiton.
Step 3: segmenting slip casting device 7 is connected with the steel fiber tube 11 on pattern board 15 by PVC box cupling 6, and carries out filler.
Step 4: when tunnel excavation to half, experimentally requires to carry out slip casting to one of them segmenting slip casting device, connects relevant grouting pipeline, opens grouting pump 16 and valve 17 carries out slip casting, terminates slip casting during slip casting ending standard to be achieved.
Step 5: after slurry consolidation, take movable joint apart and destroy slip casting separator 7 by long drill bit, use pressure flush of water a period of time afterwards, join dependency pipeline carries out slip casting next time, until third time slip casting complete after stopping slip casting.
Step 6: after segmenting slip casting device has carried out three slip casting, experimentally require to carry out slip casting to next segmenting slip casting device, 4 segmenting slip casting devices altogether, each segmenting slip casting device slip casting 3 times, overall process carries out 12 slip casting altogether.
Step 7: slip casting completes, carries out the work such as form removal.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (7)
1. a tunnel grouting model testing divides order sublevel grouting device, it is characterized in that, comprise the two segmenting slip casting devices that front and back are arranged, wherein a pair segmenting slip casting device is corresponding to the wall rock grouting reinforcing area after tunnel excavation, and another corresponds to the advanced curtain-grouting reinforcing area before tunnel excavation to segmenting slip casting device; Each segmenting slip casting device all comprises a vertical Grouting Pipe, Grouting Pipe is parallel with three corresponding with the advanced curtain-grouting reinforcing area before the wall rock grouting reinforcing area after tunnel excavation or tunnel excavation respectively slip casting flexible pipes, be provided with a slip casting separator in Grouting Pipe between every two slip casting flexible pipes, the import of Grouting Pipe is connected with grouting pump;
Described slip casting separator is the thin rounded flakes of marginal belt sawtooth, the diameter of thin rounded flakes is identical with the external diameter of Grouting Pipe, Grouting Pipe end is inserted in after being bent by thin slice sawtooth, and utilize bonding agent both to be adhesively fixed, the Grouting Pipe of bonding slip casting separator is connected by joint with the Grouting Pipe of non-caked slip casting separator, thus fixing slip casting separator.
2. tunnel grouting model testing as claimed in claim 1 divides order sublevel grouting device, and it is characterized in that, described Grouting Pipe is PVC material, and Grouting Pipe lower port is connected with steel fiber tube by PVC box cupling, and steel fiber tube passes base plate and is welded to connect with base plate.
3. tunnel grouting model testing as claimed in claim 2 divides order sublevel grouting device, and it is characterized in that, described steel fiber tube lower end is connected with grouting pipeline by movable joint, and grouting pipeline is connected with grouting pump, and grouting pipeline is provided with valve.
4. tunnel grouting model testing as claimed in claim 1 divides order sublevel grouting device, it is characterized in that, the aluminum sheet of described thin rounded flakes to be thickness be 0.23mm, this aluminum sheet can bear the grouting pressure of 1MPa, meets the requirement of model testing to grouting pressure completely.
5. tunnel grouting model testing as claimed in claim 1 divides order sublevel grouting device, it is characterized in that, described slip casting flexible pipe adopts the plastic pipe of softwood matter to make, and on flexible pipe, interval arranges the slurry mouth that overflows, and slip casting flexible pipe is connected by PVC reducing with Grouting Pipe.
6. tunnel grouting model testing as claimed in claim 1 divides order sublevel grouting device, it is characterized in that, two relative slip casting flexible pipes are arranged on the same line, and the two segmenting slip casting devices arranged front and back totally 12 slip casting flexible pipes are that positive six prisms are arranged centered by tunnel.
7. tunnel grouting model testing divides a using method for order sublevel grouting device, and step is as follows:
Step one: make slip casting separator, aluminum sheet is cut into the thin rounded flakes of band sawtooth, the diameter of thin rounded flakes is identical with the external diameter of PVC Grouting Pipe, PVC Grouting Pipe end is inserted in after being bent by aluminum sheet sawtooth, and utilize PVC bonding agent both to be adhesively fixed, the PVC Grouting Pipe of bonding slip casting separator is connected by PVC joint with the PVC Grouting Pipe of non-caked slip casting separator, thus fixing slip casting separator;
Step 2: require the number determining segmenting slip casting device according to experimental design, if the advanced curtain-grouting only carried out before tunnel excavation or the wall rock grouting after only carrying out tunnel excavation are reinforced, need 2 segmenting slip casting devices, if carry out two kinds of grouting and reinforcings simultaneously, need 4 segmenting slip casting devices; Require to determine PVC Grouting Pipe length and slip casting hose length according to experimental design; And slip casting separator, PVC Grouting Pipe and slip casting flexible pipe are assembled into segmenting slip casting device;
Step 3: segmenting slip casting device is connected with the steel fiber tube on pattern board by PVC box cupling, and carries out filler;
Step 4: when tunnel excavation to half, experimentally requires to carry out slip casting to one of them segmenting slip casting device, connects relevant grouting pipeline, opens grouting pump and valve carries out slip casting, terminates slip casting during slip casting ending standard to be achieved;
Step 5: after slurry consolidation, take movable joint apart and destroy slip casting separator by long drill bit, use pressure flush of water afterwards, join dependency pipeline carries out slip casting next time, until third time slip casting complete after stopping slip casting;
Step 6: after segmenting slip casting device has carried out three slip casting, experimentally requires to carry out slip casting to next segmenting slip casting device, each segmenting slip casting device slip casting 3 times;
Step 7: slip casting completes, carries out form removal work.
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| CN106089240B (en) * | 2016-06-14 | 2019-02-22 | 重庆工商职业学院 | Support System in Soft Rock Tunnels segments in a circular shape excavation supporting system and its method for protecting support |
| CN106324222A (en) * | 2016-09-26 | 2017-01-11 | 河海大学 | Model testing device for simulating underground tunnel construction and use method of model testing device |
| CN110565740B (en) * | 2019-08-13 | 2021-04-30 | 中广核工程有限公司 | Method for connecting open hole of submarine tunnel and riser |
| CN111173537B (en) * | 2020-01-07 | 2022-05-03 | 中铁十八局集团有限公司 | Large-scale supplementary grouting method between duct piece and surrounding rock for tunnel construction by TBM method |
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| JP2813606B2 (en) * | 1996-03-29 | 1998-10-22 | 岡 正孝 | Epoxy resin adhesive injection equipment used when bonding pier reinforced steel plates |
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| CN201087377Y (en) * | 2007-06-01 | 2008-07-16 | 王晶晶 | Combined injection tube of rear mud jacking filling pile |
| CN102808413A (en) * | 2012-08-21 | 2012-12-05 | 福州市第三建筑工程公司 | Reinforcement-replacing sectional-grouting pipe with inner piston and construction method thereof |
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Inventor after: Zhang Lianzhen Inventor after: Li Shucai Inventor after: Li Tibing Inventor after: Li Lapu Inventor after: Weng Xianjie Inventor after: Wang Deming Inventor after: Li Xianghui Inventor after: Zhao Peng Inventor before: Zhang Weijie Inventor before: Li Shucai Inventor before: Li Tibing Inventor before: Li Lapu Inventor before: Weng Xianjie Inventor before: Wang Deming Inventor before: Li Xianghui Inventor before: Zhao Peng |
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