CN207161107U - Multistage densification formula mini-valve tube - Google Patents

Multistage densification formula mini-valve tube Download PDF

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Publication number
CN207161107U
CN207161107U CN201720947379.6U CN201720947379U CN207161107U CN 207161107 U CN207161107 U CN 207161107U CN 201720947379 U CN201720947379 U CN 201720947379U CN 207161107 U CN207161107 U CN 207161107U
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CN
China
Prior art keywords
tube
slip casting
valve
multistage
geotechnological cloth
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Active
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CN201720947379.6U
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Chinese (zh)
Inventor
单通
闫自海
臧延伟
朱双厅
金威
甘鹏路
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Powerchina Huadong Engineering Corp Ltd
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Powerchina Huadong Engineering Corp Ltd
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Priority to CN201720947379.6U priority Critical patent/CN207161107U/en
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Abstract

A kind of multistage densification formula mini-valve tube is the utility model is related to, effectively controls range of grouting, avoids grout, running pulp phenomenon, it is accurate to control the horizontal to skew and convergent deformation effect of tunnel.The technical solution of the utility model is:A kind of multistage densification formula mini-valve tube, including slip casting outer tube, be connected to outer tube lower end termination and the coaxial slip casting inner tube being placed in outer tube;The outer tube bottom is slip casting section, the rubber valve being uniformly provided with the slip casting section of the outer tube inside and outside some connection outer tubes;Its slip casting section is corresponded on the outer tube and is cased with geotechnological cloth set, geotechnological cloth set is fixed on outer tube through some retainer rings by certain length segmentation, and multiple chambers are separated to form through the retainer ring between geotechnological cloth set and outer tube.The utility model is applied to basic engineering construction field.

Description

Multistage densification formula mini-valve tube
Technical field
It the utility model is related to a kind of multistage densification formula mini-valve tube.Suitable for basic engineering construction field.
Background technology
With the rapid development of urban rail transit in China construction, in China, the Deep Thick Soft Ground Area of southeastern coast is built A large amount of shield tunnels.By the monitoring and inspection to soft clay area built shield tunnel, longitudinal differential settlement and excessive horizontal stroke It is the important disease form in operation phase tunnel to deformation, the damage of tunnel structure and the failure of waterproof can be caused, threaten tunnel Operation security." micro-disturbance two fluid grouting technology " uses sleeve valve barrel grouting technique, by carrying out grout injection control tunnel in tunnel both sides The excessive skew in road and convergent deformation, achieve preferable engineering effort.
But a large amount of engineering practices show, conventional slurry injection technique of sleeve valve tube is mainly the slurry that horizontal splitting is produced in the soil body Arteries and veins, it vertically jacks the effect of the soil body and is better than horizontal direction Bit andits control effect;Meanwhile the range of scatter of slurries is difficult to control System, easily produce the phenomenon of grout and running pulp, it is impossible to form continuous injecting cement paste.Conventional sleeve valve barrel grouting method can not be accurate Tunnel convergence deformation is controlled, easily produces the secondary disease in tunnel.
The content of the invention
The technical problems to be solved in the utility model is:For above-mentioned problem, there is provided a kind of simple in construction, construction Convenient multistage densification formula mini-valve tube, effectively controls range of grouting, avoids grout, running pulp phenomenon, the accurate level for controlling tunnel To skew and convergent deformation effect.
Technical scheme is used by the utility model:A kind of multistage densification formula mini-valve tube, including slip casting outer tube, be connected to it is outer The termination of pipe lower end and the coaxial slip casting inner tube being placed in outer tube;
The outer tube bottom is slip casting section, the rubber being uniformly provided with the slip casting section of the outer tube inside and outside some connection outer tubes Valve;Its slip casting section is corresponded on the outer tube and is cased with geotechnological cloth set, geotechnological cloth set is fixed through some retainer rings by certain length segmentation In on outer tube, multiple chambers are separated to form through the retainer ring between geotechnological cloth set and outer tube;
The slip casting inner tube bottom is fixed with upper and lower two sealing rings, is formed between upper and lower two sealing ring by outer tube The closed cavity that wall, slip casting outer wall of inner tube and two sealing rings surround, connection note is provided with the slip casting inner tube, between two sealing rings Starch the injected hole inside and outside inner tube.
The rubber valve is between adjacent two retainer rings.
Between upper and lower two sealing ring spacing with it is adjacent identical to spacing between retainer ring.
The outer tube outer wall corresponds to the retainer ring and is provided with locating slot.
The tensile strength of the geotechnological cloth set is more than 15kN/m.
The volume sum of chamber is design grouting volume 0.6~0.9 times between the geotechnological cloth set and outer tube.
A kind of multistage densification formula sleeve valve barrel grouting method, including step are as follows:
A, drilling is formed;
B, perfusion sleeve shell material in drilling;
C, multistage densification formula mini-valve tube of the present invention is pressed into and drilled, to bottom hole, mini-valve tube top is above ground level;
D, carried out by the slip casting inner tube of mini-valve tube through the chamber of closed cavity, rubber valve between geotechnological cloth set and outer tube Slip casting, from bottom to top chamber is in the milk one by one.
The sleeve shell material is that bentonite and cementitious composite form.
The slurries of slip casting use cement-sodium silicate double liquid in step d.
The diameter of the drilling is more than or equal to 10cm.
Compared with conventional sleeve valve barrel grouting method, the beneficial effects of the utility model are:
(1) the utility model carries out Discrete control to slurries, constrains the diffusion of slurries, realizes and built shield tunnel is deformed Accurate control;
(2) the utility model can be effectively formed the form of compaction grouting, constrain the diffusion of slurries, avoid grout, running pulp Phenomenon, reduce the disturbance to surrounding soil, avoid the generation of the secondary disease in tunnel;
(3) outsourcing geotextiles can be rapidly filtered out the moisture in slurries, advantageously form injecting cement paste continuous, that intensity is high.
Brief description of the drawings
Fig. 1 is the utility model half sleeve valve tubular construction schematic diagram.
Fig. 2 is sleeve valve barrel grouting schematic diagram in the utility model.
Embodiment
As shown in figure 1, the present embodiment is a kind of multistage densification formula mini-valve tube, available for the deformation of control established tunnel, tool There is outer tube 4 and be connected to the termination 9 of outer tube lower end, and the coaxial slip casting inner tube 5 being placed in outer tube.
The bottom of this example middle external tube 4 is slip casting section, the rubber valve being uniformly provided with the slip casting section of outer tube inside and outside 4 connection outer tubes 3;Its slip casting section is corresponded on outer tube 4 and is cased with geotechnological cloth set 2, geotechnological cloth set is fixed through 5 retainer rings 1 according to 1.0m length segmentation In on outer tube, 4 chambers 10 are separated to form through retainer ring 1 between geotechnological cloth set 2 and outer tube 4.Wherein, geotechnological cloth set 2 and outer tube 4 Between the volume sum of each chamber 10 be design 0.6~0.9 times of grouting volume, the tensile strength of geotechnological cloth set 2 is more than 15kN/m;The position of retainer ring 1 corresponding to the outer wall of outer tube 4 is provided with locating slot 12.Rubber valve 3 is fixed positioned at adjacent two in the present embodiment Between ring 1, that is, each chamber 10 is corresponded to provided with a circle rubber valve 3.
The bottom of slip casting inner tube 5 is fixed with upper and lower two sealing rings 7, and between upper and lower two sealing ring 7 spacing with it is adjacent to Spacing is identical between retainer ring 1;Formed between upper and lower two sealing ring by the inwall of outer tube 4, the outer wall of slip casting inner tube 5 and two sealings The closed cavities 11 that surround of circle 7, the injected hole 8 being provided with slip casting inner tube 5, between two sealing rings 7 inside and outside connection slip casting inner tube.
As shown in Fig. 2 a kind of multistage densification formula sleeve valve barrel grouting method of the present embodiment, step are as follows:
A, drill:Drilling of the diameter not less than 10cm is crept into using geological drilling rig, by measuring keyhole hole position Maximum deviation and the error of perpendicularity;
B, sleeve shell material is irrigated:After washing drilling using clear water, irrigated at once in drilling by bentonite and cementitious composite The sleeve shell material 6 formed, fill the space between mini-valve tube and drilling;
C, mini-valve tube and centering are pressed into:Multistage densification formula mini-valve tube in the present embodiment is put into drilling, to bottom hole, valve of tucking inside the sleeve Pipe top 0.5m above ground level;
D, segmenting slip casting:Using retrusive segmenting slip casting, slip casting length is chosen for 1.0m, the slurries of slip casting using cement- Waterglass dual slurry, slurries enter geotechnological cloth set 2 and outer tube by the slip casting inner tube 5 of mini-valve tube through closed cavity 11, rubber valve 3 Chamber 10 between 4, from bottom to top chamber 10 is in the milk one by one, and grouting quality is checked after the completion of slip casting.
The utility model can adjust note in time by the detailed monitoring deformed to built shield tunnel in work progress Starch pressure and grouting amount.

Claims (6)

  1. A kind of 1. multistage densification formula mini-valve tube, it is characterised in that:With outer tube (4) and the termination (9) of outer tube lower end is connected to, and The coaxial slip casting inner tube (5) being placed in outer tube;
    Outer tube (4) bottom is slip casting section, the rubber valve being uniformly provided with the slip casting section of the outer tube inside and outside some connection outer tubes (3);Its slip casting section is corresponded on the outer tube (4) and is cased with geotechnological cloth set (2), geotechnological cloth set presses a fixed length through some retainer rings (1) Degree segmentation is fixed on outer tube, and multiple chambers (10) are separated to form through the retainer ring (1) between geotechnological cloth set and outer tube;
    Slip casting inner tube (5) bottom is fixed with upper and lower two sealing rings (7), is formed between upper and lower two sealing ring by outer tube (4) closed cavity (11) that inwall, slip casting inner tube (5) outer wall and two sealing rings (7) surround, on the slip casting inner tube (5), two close The injected hole (8) being provided between seal (7) inside and outside connection slip casting inner tube.
  2. 2. multistage densification formula mini-valve tube according to claim 1, it is characterised in that:The tension of the geotechnological cloth set (2) is strong Degree is more than 15kN/m.
  3. 3. multistage densification formula mini-valve tube according to claim 1, it is characterised in that:Described in outer tube (4) outer wall is corresponding Retainer ring (1) is provided with locating slot (12).
  4. 4. multistage densification formula mini-valve tube according to claim 1, it is characterised in that:The rubber valve (3) is located at adjacent two Between the retainer ring (1).
  5. 5. multistage densification formula mini-valve tube according to claim 1, it is characterised in that:Spacing between upper and lower two sealing ring (7) Spacing is identical between adjacent two retainer ring (1).
  6. 6. multistage densification formula mini-valve tube according to claim 1 or 2, it is characterised in that:The geotechnological cloth set (2) and outer tube (4) the volume sum of chamber (10) is design grouting volume 0.6~0.9 times between.
CN201720947379.6U 2017-08-01 2017-08-01 Multistage densification formula mini-valve tube Active CN207161107U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720947379.6U CN207161107U (en) 2017-08-01 2017-08-01 Multistage densification formula mini-valve tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720947379.6U CN207161107U (en) 2017-08-01 2017-08-01 Multistage densification formula mini-valve tube

Publications (1)

Publication Number Publication Date
CN207161107U true CN207161107U (en) 2018-03-30

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CN201720947379.6U Active CN207161107U (en) 2017-08-01 2017-08-01 Multistage densification formula mini-valve tube

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110106883A (en) * 2019-04-23 2019-08-09 天津大学 A kind of Real-time Feedback grouting method for correcting subway tunnel horizontal distortion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110106883A (en) * 2019-04-23 2019-08-09 天津大学 A kind of Real-time Feedback grouting method for correcting subway tunnel horizontal distortion

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