CN207063981U - A kind of underground mould bag stake suspension device - Google Patents
A kind of underground mould bag stake suspension device Download PDFInfo
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- CN207063981U CN207063981U CN201720317212.1U CN201720317212U CN207063981U CN 207063981 U CN207063981 U CN 207063981U CN 201720317212 U CN201720317212 U CN 201720317212U CN 207063981 U CN207063981 U CN 207063981U
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- mould bag
- slurry outlet
- mould
- grouting pipe
- bag
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Abstract
The utility model discloses a kind of underground mould bag stake suspension device, including multiple mould pocket；Grouting Pipe is set in each mould pocket, the Grouting Pipe sets slurry outlet；Separator is provided with the Grouting Pipe, the posterior segment of the Grouting Pipe sets mould bag, and Grouting Pipe leads to mould bag provided with an at least slurry outlet；It is drainpipe between mould bag rear end and the outer wall of Grouting Pipe；Grouting Pipe leading portion is surrounded by segmentation mould bag.The utility model has the advantages that sedimentation is excavated in good stress condition, sealing effect, effectively control.
Description
Technical field
A kind of underground mould bag stake suspension device is the utility model is related to, more particularly to one kind in ink feed conduits and inkjet mouth
Between be provided with air indwelling chamber underground mould bag stake suspension device, set more particularly to one kind between jet orifice and inkjet mouth
The underground mould bag stake suspension device of air indwelling chamber.
Background technology
In Support System in Soft Rock Tunnels digging process, in order to prevent the addresses such as Tunnel Landslide water burst, wall rock loosening, ground settlement
Disaster, need to carry out pre-reinforcement construction before excavation.The more common and ripe engineering method of weak surrounding rock pre support construction at present has
Pipe shed method, pipe-roof method construction, small-lead-tube advanced slip-casting method, horizontal jet grouting or paddling process, shield method, freezing etc..Its middle pipe canopy
It is that Support System in Soft Rock Tunnels excavates the most frequently used pre support reinforcement technique that method is combined with grouting with small pipe method.
Referring to Fig. 1, piped shed conslruction method is as follows：The arch area that pipe roof construction is intended excavating first with rig in tunnel
According to design aperture, spacing and deep drilling, embedded steel pipe (tube wall preboring perforation) simultaneously passes through the grouting and reinforcing soil body and raising
The rigidity of steel pipe so that intend tunneling arch and be pre-formed advanced pre support system.Because pipe canopy combining structure has in itself
There is shear behavior, can effectively carry the load of top relaxation Soft Soil Layer, maintain stable face, control stratum deformation, pre- avalanche prevention
Collapse roof fall accident.But due to poor sealing performance, generally require to be applied in combination with small-lead-tube advanced slip-casting reinforcement technique.
The shortcomings that pipe roof construction method：Pile body self-strength is poor, poor to surrounding rock consolidation effect, and water-stagnating effect is poor, most of feelings
Condition needs to coordinate per-fore pouring liquid with small pipe to reinforce but adds the disturbance to country rock.
Per-fore pouring liquid with small pipe is reinforced, it is necessary to be used cooperatively with steel arch-shelf.Will be small according to certain angle around working face
Conduit, which is beaten and (bored, pressure), to be entered in stratum, slurries is permeated by ductule using grouting pump, is diffused into formation void, crack or soft
In weak stratum, improve the physical and mechanical properties of the soil body to a certain extent, play certain sealing and improve the carrying of country rock
The effect of power.But there is the shortcomings of slip casting effect is poor, and reinforcing scope is small.
Utility model content
The purpose of this utility model is to provide a kind of underground mould bag stake suspension device, to solve present in prior art
Above mentioned problem.
The technical scheme that the utility model is provided is as follows：
A kind of underground mould bag stake suspension device, including：
Including multiple mould pocket (31)；Grouting Pipe (32) is set in each mould pocket (31), the Grouting Pipe (32) sets out slurry
Hole (35)；Grouting Pipe (32) Inner Front End is provided with preceding separator (38), and middle part is provided with rear separator (36), the Grouting Pipe (32)
Posterior segment sets mould bag (34)；It is drainpipe (33) between the outer wall of mould bag (34) rear end and Grouting Pipe (32)；Before Grouting Pipe (32)
Section is surrounded by segmentation mould bag (37)；Grouting Pipe (32) leads to mould bag (34) provided with an at least slurry outlet, and a slurry outlet, which leads to, separates mould
Bag (37), and a slurry outlet lead to mould bag (34) and the gap being segmented between mould bag (37)；Separator (36) is located at and led to afterwards
The slurry outlet of mould bag (34) and towards between the slurry outlet in the gap between mould bag (34) and segmentation mould bag (37).
In the utility model, mould pocket footpath is chosen according to Theoretical Design, and boring direction tunnels tunnel wheel along plan
Profile is outwards into certain inclination angle.Preferably, can be 20-40 degree.
In the utility model, drill hole inclination controls within certain limit (preferably, less than 30 degree), drilling point
The construction of two sequences (is constructed) every hole.After drilling construction is completed, sediment in flushing hole so that stake holes meets that the decentralization of mould bag requires.
In preferred embodiment of the present utility model, before the side of the Grouting Pipe (32) in after set a slurry outlet respectively
(35) slurry outlet (353) before, being respectively, middle slurry outlet (352) and rear slurry outlet (351)；In preceding slurry outlet (353) and middle pulp
Separator (36) is provided between hole (352), the posterior segment of the Grouting Pipe (32) sets mould bag (34), pulp in the mould bag (34) cladding
Hole (352) and rear slurry outlet (353).
The advantages of the utility model, is as follows：
1. good stress condition.Underground mould bag stake arching wall construction equivalent to having built one in advance in Soft Soil Layer
Individual reinforced concrete supporting arch, the compression strength of mould bag cement calculus can reach more than 40MPa, have very high bearing capacity and resist
Damage capability, it can ensure that the safety of tunnel excavation in Soft Soil Layer.
2. good sealing effect.Underground mould bag stake arching wall protection structure itself has good sealing effect, and
The effect (the c values and φ values that improve the soil body) of compacted compacting and draining hardening is served to the Soft Soil Layer of surrounding, with mould bag stake
Arch ring supporting construction forms overall shared upper load and sealing, effectively raises integrated carrying ability and reduces seepage
Water risk.
3. effectively sedimentation is excavated in control.Due to can effectively solve leakage problem in work progress, so being avoided that underground
Problem is settled and collapsed caused by water level decreasing, it is ensured that construction safety.Underground mould bag stake arching wall total bearing capacity is strong,
The relaxation deformation on stratum can be greatly improved, ensures that sedimentation and deformation does not occur in digging process.
4. effective console dynamic deformation.This technology is smaller to soil layer disturbing influence around by brand-new technology,
Can effective console dynamic deformation, do not interfere with the safety of upper building, do not influence the safe operation of top railway.
5. it is convenient to construct.This new technology uses small, dedicated equipment, quick construction, place strong applicability.
6. multiple action.Reduce and repeat disturbance of the drilling to country rock, once construct with regard to supporting, reinforcing, sealing can be played
Multiple effect.
Brief description of the drawings
Fig. 1 is piped shed conslruction schematic diagram in the prior art；
1 '-steel grating 2 '-ductule arrow is tunneling direction
Fig. 2 the utility model mould bag stake holes bit plans；
Fig. 3 is the utility model mould bag stake plane of arrangement figure；
Fig. 4 is the utility model mould bag colligation schematic diagram；
Fig. 5 is the utility model mould bag stake slip casting schematic flow sheet；
Fig. 6 is the utility model I sequence mould bag stake slip castings；
Fig. 7 is that II sequence mould bag stakes slip casting forms braced wall；
Fig. 8 is underground mould bag stake supporting wall structure schematic diagram.
Fig. 9 is mould bag stake braced wall extrusion forming design sketch；
In figure
1- tunnels
11- intends excavation contour line 12- faces
2- steel arch-shelfs
3- mould bag pile elements
31- mould pocket 32- Grouting Pipe 33- drainpipe 34- mould bags
The slurry outlets of the 3rd slurry outlet 354- of 35- slurry outlets 351- the first slurry outlet 352- the second slurry outlet 353- the 4th
Separator 37- is segmented separator before mould bag 38- after 36-
Embodiment
In describing below, using the bottom hole direction of drilling as front end, aperture direction is rear end.
Referring to Fig. 3 and Fig. 4, the structure of mould bag pile element 3 is as follows：It includes mould pocket 31, and slip casting is provided with mould pocket 31
Pipe 32, the side of the Grouting Pipe 32 set four slurry outlets 35 from rear to preceding, respectively are the first slurry outlet 351, the second slurry outlet
352nd, the 3rd slurry outlet 353 and the 4th slurry outlet 354.Wherein the 4th slurry outlet 354 is at Grouting Pipe front end exit.In slip casting
Pipe front end exit is provided with preceding separator 38, and Grouting Pipe is in the portion perimeter cladding segmentation mould bag 37 provided with the 4th slurry outlet 354；
For Grouting Pipe in posterior segment cladding mould bag 34, the mould bag covers the first slurry outlet 351 and the second slurry outlet 352, and second
Rear separator 36 is set between the slurry outlet 353 of slurry outlet 352 and the 3rd.
It is drainpipe 33 between the outer wall of the rear end of mould bag 34 and Grouting Pipe 32.
Pile hole construction
Referring to Fig. 2 and Fig. 3, using rig pore-forming, mould pocket 31 is formed, aperture is chosen (with straight according to Theoretical Design
Exemplified by the 500mm of footpath), boring direction is along plan driving tunnel contour line outwards into certain inclination angle.Preferably, can be 20-40
Degree.
Drill hole inclination is controlled within certain limit (preferably, less than 30 degree), and drilling is divided to the construction of two sequences (to be applied every hole
Work).After drilling construction is completed, sediment in flushing hole so that stake holes meets that the decentralization of mould bag requires.
2. the colligation of mould bag and the decentralization of mould bag
(1) Mo Dai pile center steel pipe (Grouting Pipe 32) selects diameter 50mm, and wall thickness 4mm seamless steel pipes, mould bag 34 is from straight
Footpath 500mm straight barrel types geotextiles (nominal fracture strength is 50kN/m).Center steel pipe plays slip casting passage and mould bag is oriented to, supported
Effect, according to stake deeply design set mould bag colligation length.
(2) after pore-forming, verification hole position, hole depth etc., after being satisfied by design requirement, start to bury and put mould bag steel pipe.Mould bag stake
Process and bury to put and be responsible for by special messenger, mould bag stake will avoid winding or scratching in decentralization process.Such as because of collapse hole or bottom hole deposit,
Bury and put again after palpus borehole cleaning.
Referring to Fig. 5 to Fig. 7, the utility model construction method is as follows：
(1) grouting material and grouting equipment.Mould bag stake grouting material is intended selecting P.O42.5 Portland cement slurries,
Controlling cement grout is P.O42.5 Portland cements and Chemical Control liquid using material.Cement grout is formulated as water ash
Than 0.8:1, in Chemical Control liquid addition content and opportunity window depending on boosting situation and grout absorption change, generally cement grout
8~10%.For grouting equipment using 3SNS grouting pumps and the self-control small pump of hydraulic pressure, pulping equipment is self-control twin-tub mixer.3SNS is filled
Stock pump pours into cement grout, and the self-control small pump of hydraulic pressure pours into Chemical Control liquid.
(2) grouting order and grouting way.
As shown in Fig. 5 to Fig. 8, mould bag stake grouting material is inputted by Grouting Pipe 32 using grouting pump first, due to rear separation
The stop of device 36, mould bag stake grouting material enter mould bag 34 from the first slurry outlet 351, the second slurry outlet 352.Mould bag 34 reaches one
After determining degree of saturation, small grouting pump is changed according to full situation and carries out supplementary irrigation construction.After the completion of mould bag stake mud jacking, pipe is washed in punching,
Being controlled property cement grout again, the strict relation for controlling grouting amount and pressure.When pressure reaches to a certain degree, rear separator
36 is destroyed, and cement grout enters segmentation mould bag 37 from the 4th slurry outlet 354, while enters mould bag 34 from the 3rd slurry outlet 353
Gap and outside between segmentation mould bag 37.
Finally, Grouting Pipe 32 is full of.
(3) pressure is set.Pressure is influenceed by soil layer geology, and pressure change can only qualitatively judge mould bag in grouting pressure in hole
Whether opened under effect, it is impossible to which quantitative analysis mould bag deploys and turgor.Each section of grouting setting pressure such as table 1：
Each section of grouting setup pressure value of table 1
4) grouting control and ending standard.A. pressure up to slurry is not entered after 0.5~1.5MPa, stablizes 5 points during mould bag stake slip casting
Terminate after clock, the control of the rate of climb to grout absorption and pressure is paid attention to during mud jacking, injection speed should be controlled in 30~50L/
Min, it is ensured that mould bag has the filter water discharge time of abundance, and small pump progress supplementary irrigation construction, supplementary irrigation note are changed after reaching certain degree of saturation
Speed control is starched in 10L~15L/min；Injection rate according to mould bag volume typically per linear meter(lin.m.) average cement mixed weight 200~
300kg.B. controlling cement grout enters to starch pressure up to maximum under the premise of ensuring not lift, and enters after slurry rate drops to 2L/min
Stablizing can terminate to be in the milk for 5 minutes, actually the closely knit situation regulation of the amount of pouring into manufacture bases geology, to reach soil layer consolidation effect as mesh
's.
(5) mould bag stake supporting wall structure.
Slip casting (Fig. 7) is carried out to I sequences (1,3,5,7 ...) mould bag stake first, treats that I sequence mould bags fully expand and reach certain strong
Spend and then to II sequences (2,4,6,8 ...) mould bag stake slip casting (Fig. 8).Between mould bag stake, between the stake of mould bag and surrounding soil mutually
Extruding, the cement calculus under high pressure effect in mould bag can reach very high intensity (the average 40MPa of compression strength).In addition,
It is overall that each mould bag stake forms continuous braced wall under self extrusion and controlling slip casting effect, the interior friction man of the soil body and viscous
Poly- power also has significant improvement, on the whole with high intensity, high stability, strong sealing the characteristics of.
A specific embodiment of the present utility model is above are only, but design concept of the present utility model is not limited to
This, all changes for carrying out unsubstantiality to the utility model using this design, all should belong to infringement scope of protection of the utility model
Behavior.
Claims (4)
- A kind of 1. underground mould bag stake suspension device, it is characterised in that including：Multiple mould pocket (31)；Grouting Pipe (32) is set in each mould pocket (31), the Grouting Pipe (32) sets slurry outlet (35)；Should Grouting Pipe (32) Inner Front End is provided with preceding separator (38), and middle part is provided with rear separator (36), and the posterior segment of the Grouting Pipe (32) is set Mould bag (34)；It is drainpipe (33) between the outer wall of mould bag (34) rear end and Grouting Pipe (32)；Grouting Pipe (32) leading portion is surrounded by point Section mould bag (37)；Grouting Pipe (32) leads to mould bag (34) provided with an at least slurry outlet, and a slurry outlet, which leads to, separates mould bag (37), with And the gap that leads between mould bag (34) and segmentation mould bag (37) of slurry outlet；Separator (36) is located at towards mould bag (34) afterwards Slurry outlet and towards between the slurry outlet in the gap between mould bag (34) and segmentation mould bag (37).
- A kind of 2. underground mould bag stake suspension device as claimed in claim 1, it is characterised in that：Mould pocket (31) direction is along plan Tunnel contour line is tunneled outwards into certain inclination angle, described inclination angle is 20-40 degree.
- A kind of 3. underground mould bag stake suspension device as claimed in claim 1, it is characterised in that：Mould pocket (31) gradient is less than (30) spend.
- A kind of 4. underground mould bag stake suspension device as claimed in claim 1, it is characterised in that：Before the side of the Grouting Pipe (32) In after set a slurry outlet (35) respectively, slurry outlet (353) before being respectively, middle slurry outlet (352) and rear slurry outlet (351)；Preceding Separator (36) is provided between slurry outlet (353) and middle slurry outlet (352), the posterior segment of the Grouting Pipe (32) sets mould bag (34), Slurry outlet (352) and rear slurry outlet (353) in the mould bag (34) cladding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720317212.1U CN207063981U (en) | 2017-03-29 | 2017-03-29 | A kind of underground mould bag stake suspension device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720317212.1U CN207063981U (en) | 2017-03-29 | 2017-03-29 | A kind of underground mould bag stake suspension device |
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| Publication Number | Publication Date |
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| CN207063981U true CN207063981U (en) | 2018-03-02 |
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ID=61501223
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| CN201720317212.1U Active CN207063981U (en) | 2017-03-29 | 2017-03-29 | A kind of underground mould bag stake suspension device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006139A (en) * | 2021-03-26 | 2021-06-22 | 北京城建设计发展集团股份有限公司 | Complete replacement method for treating side wall defects |
-
2017
- 2017-03-29 CN CN201720317212.1U patent/CN207063981U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006139A (en) * | 2021-03-26 | 2021-06-22 | 北京城建设计发展集团股份有限公司 | Complete replacement method for treating side wall defects |
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