CN217897884U - Valve type double-perforated-pipe back-pressure grouting structure - Google Patents
Valve type double-perforated-pipe back-pressure grouting structure Download PDFInfo
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- CN217897884U CN217897884U CN202222125541.XU CN202222125541U CN217897884U CN 217897884 U CN217897884 U CN 217897884U CN 202222125541 U CN202222125541 U CN 202222125541U CN 217897884 U CN217897884 U CN 217897884U
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Abstract
The utility model provides a valve type double flower pipe back pressure slip casting structure, including locating the downthehole long floral tube of slip casting, short floral tube, the defeated thick liquid pipe that passes through muffjoint with long floral tube and short floral tube, a total valve for controlling long floral tube and short floral tube total volume of advancing, a thick liquid valve that advances that is used for controlling long floral tube volume of advancing, defeated thick liquid intraductal thick liquid pressure's manometer of thick liquid before the monitoring reposition of redundant personnel, for the thick liquid provide the slip casting pump of slip casting pressure and hold the flourishing thick liquid bucket of thick liquid, the one end of slip casting pump stretches into flourishing thick liquid bucket, the other end and defeated thick liquid pipe intercommunication. The utility model discloses structural design based on length perforated pipe has avoided the installation of geomembrane bag, and it is reliable to effectively guarantee length perforated pipe and defeated thick liquid union coupling to and valve and manometer mutually support dynamic adjustment slip casting parameter, improve the efficiency of construction, guarantee the engineering quality.
Description
Technical Field
The utility model relates to a building engineering field specifically is a two floral tube back pressure slip casting structures of valve formula.
Background
In the excavation construction process of underground projects such as traffic tunnels, water delivery tunnels, urban subways and the like, unfavorable geological sections such as fault fracture zones, joint dense zones, underground water development zones and the like cannot be avoided. For effectively avoiding the emergence of geological disasters such as gushing water and suddenly mud in the tunnel work progress, generally adopt advance detection technique to ascertain unfavorable geological formation position and degree in advance to the application advances the preprocessing technique and carries out water shutoff to unfavorable geological formation and consolidate, thereby avoids geological disasters 'emergence, guarantees personnel's safety and improves construction progress and quality. The prior common advanced pretreatment technology comprises various technical means such as tunnel face full-face/half-face grouting, pipe shed grouting, back pressure film bag grouting and the like.
The working principle of the back-pressure membrane bag grouting is that before a tunnel excavation meets a bad geological tunnel section, a rock-soil body with a certain thickness is reserved as a safety wall and a grout stop wall, a geomembrane bag is fixed behind a grouting pipe and is arranged in a water burst channel, and then another grouting pipe without a membrane bag is arranged in the water burst channel through a grouting hole, but the arrangement depth of the grouting pipe without the fixed geomembrane bag in the rock-soil body is ensured to be larger than that of the grouting pipe with the fixed geomembrane bag; after the installation is finished, usually, firstly, injecting high polymer grouting material into the geomembrane bag, rapidly expanding and solidifying the high polymer material in the geomembrane bag, utilizing the high polymer grouting material to expand the geomembrane bag and block the water burst channel, then injecting the high polymer material into the water burst channel through the grouting pipe without the geomembrane bag, expanding and solidifying the high polymer material in the water burst channel, thereby rapidly blocking the water burst channel opening and playing the advanced pretreatment effect of the unfavorable geological section
The existing back pressure membrane bag grouting technology generally has the following defects:
(1) The process is complicated because the geomembrane bags are tied up;
(2) If the outlet of the grouting pipe without the membrane bag is shallower than the outlet of the grouting pipe with the membrane bag, the grouting material can block the outlet of the grouting pipe without the membrane bag, so that the difference of the placing depth of the two grouting pipes in the rock-soil body must be ensured;
(3) The used materials are mainly high polymer foaming grouting materials, the types of the applicable grouting materials are limited, and the technical requirements are high.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art exists, the utility model provides a valve type double-flower pipe back pressure slip casting structure, the utility model discloses structural design based on long and short floral tube has avoided the installation of geomembrane bag, and it is reliable to effectively guarantee long and short floral tube and defeated thick liquid union coupling to and valve and manometer mutually support dynamic adjustment slip casting parameter, improve the efficiency of construction, guarantee engineering quality.
The utility model provides a valve type double flower pipe back pressure slip casting structure, including locating downthehole long flower pipe of slip casting, short flower pipe, with long flower pipe and short flower pipe through muffjoint's defeated thick liquid pipe, be used for controlling the total valve of long flower pipe and short flower pipe total volume of advancing, be used for controlling the volume of advancing thick liquid valve of long flower pipe volume of advancing thick liquid, monitor the shunt preceding defeated thick liquid intraductal thick liquid pressure's of thick liquid manometer, for the thick liquid provide grouting pressure's grouting pump and hold the flourishing thick liquid bucket of thick liquid, the one end of grouting pump stretches into flourishing thick liquid bucket, the other end and defeated thick liquid pipe intercommunication, the degree of depth that stretches into the grouting hole of long flower pipe is greater than the degree of depth that short flower pipe stretched into the grouting hole.
Furthermore, one end of the long perforated pipe and one end of the short perforated pipe are arranged in the grout hole, and the other ends of the long perforated pipe and the short perforated pipe are connected with two branch ports of the grout conveying pipe.
The utility model adopts a double-pattern pipe back-pressure grouting structure, wherein slurry outlets are arranged around the pattern pipe, and slurry is diffused from the outlet position to block water in and around the water burst channel, so that a film bag is not needed, and the construction process is simple; in addition, the long and short perforated pipes are connected through the sleeve, so that the depth difference of the long and short perforated pipes in a grouting area can be ensured; the grouting structure design is suitable for high polymer grouting materials, and also has adaptability to epoxy resin grouting materials and cement-water glass grouting materials by dynamically adjusting grouting parameters, and has good popularization and application prospects.
Drawings
FIG. 1 is an overall external structural view of the present invention;
FIG. 2 is a view showing that the installation of long and short floral tubes in the grouting area of the utility model is completed;
fig. 3 is a schematic sectional view of the valve type double-perforated pipe back pressure grouting structure of the present invention after installation.
In the figure: 1-short perforated pipe, 2-grout stopping plug, 3-sleeve, 4-grout conveying pipe, 5-long perforated pipe, 6-grout inlet valve, 7-pressure gauge, 8-grout containing barrel, 9-grouting pump and 10-main valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Please refer to fig. 1, the utility model discloses one of them embodiment of valve formula double flower pipe back pressure slip casting structure, including locating the downthehole long floral tube 5 of slip casting, short floral tube 2, with long floral tube 5 and short floral tube 2 through the defeated thick liquid pipe 4 that sleeve 3 is connected, a total valve 10 for controlling long floral tube 5 and the total thick liquid volume of advancing of short floral tube 2, the thick liquid valve 6 that advances for controlling the thick liquid volume of long floral tube 5, the manometer 7 of thick liquid pressure in the defeated thick liquid pipe 4 before the monitoring reposition of redundant personnel, for the thick liquid provides grouting pump 9 of slip casting pressure and holds flourishing thick liquid bucket 8 of thick liquid, flourishing thick liquid bucket 8 is stretched into to grouting pump 9's one end, the other end and defeated thick liquid pipe 4 intercommunications.
The back pressure grouting is an effective advanced pretreatment technology for construction of unfavorable geological sections, has good water-driving and reinforcing effects on broken surrounding rocks, argillization interlayers, underground water development areas and the like, can effectively avoid the occurrence of water burst and mud outburst in the construction process, but has higher requirements on installation of geomembrane bags on grouting pipes and the embedded depth difference of the grouting pipes in rock and soil bodies in the back pressure membrane bag grouting commonly used at present.
The utility model discloses earlier to installing the floral tube (long floral tube 5, short floral tube 2) that two length are different in waiting the drilling of slip casting district, rethread sleeve 3 connects long and short floral tube (2, 5) and defeated thick liquid pipe 4, effectively guarantees the reliability of connection, also ensures the degree of depth difference of long and short floral tube in the slip casting district simultaneously. Taking the high polymer grouting of the back pressure film bag as an example, after the grout is prepared, the grout inlet valve 6 of the long perforated pipe 5 is disconnected, the grout in the grout containing barrel 8 is conveyed to the short perforated pipe 1 through the grouting pump 9, so that the cracks are quickly filled near the safety rock and the grout stopping wall to seal the water seepage and gushing channel, and the fracture is compacted to reinforce the rock mass; and then, opening a grout inlet valve 6 of the long perforated pipe 5, continuously filling the poor geological formation which is not completely filled near the grout stop wall by part of grout through the short perforated pipe 1, filling and reinforcing the stratum in the deep part by the other part of grout through the long perforated pipe 5, mutually promoting the long and short perforated pipes and better ensuring the advanced pre-grouting effect. If the constructor is familiar with the material performance, the slurry inlet valve 6 of the long perforated pipe 5 can be opened first, and the long and short perforated pipes are used for filling and reinforcing at the far and near positions at the same time, but a field test must be carried out before engineering application. The grouting structure design is suitable for high polymer grouting materials, and also has adaptability to epoxy resin grouting materials and cement-water glass grouting materials by dynamically adjusting grouting parameters, and has good popularization and application prospects.
In the prior art, the size of the geomembrane bag is enlarged mainly by slurry consolidation expansion, so that the purpose of plugging a water burst channel is achieved. The utility model adopts a double-pattern pipe back pressure grouting structure, slurry outlets are arranged around the pattern pipe, and the slurry is diffused from the outlet position to block water and reinforce a water gushing channel and the periphery of the water gushing channel, so that a membrane bag is not needed; the placement depth of the long perforated pipe is determined according to the design parameters of the grouting length, and the grout of the long perforated pipe is mainly used for consolidating and blocking water in the front area where the grout of the short perforated pipe cannot reach.
The above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. The utility model provides a valve formula double flower pipe back pressure slip casting structure which characterized in that: including locating downthehole long floral tube of slip casting, short floral tube, with long floral tube and short floral tube through muffjoint's defeated thick liquid pipe, be used for controlling the total valve of advancing thick liquid volume of long floral tube and short floral tube, be used for controlling the thick liquid valve of advancing of long floral tube into thick liquid volume, monitor the thick liquid pressure gauge of thick liquid intraductal thick liquid of thick liquid before shunting, for the thick liquid provide grouting pressure's grouting pump and hold thick liquid bucket, the one end of grouting pump stretches into and holds thick liquid bucket, the other end and defeated thick liquid pipe intercommunication, the degree of depth that stretches into the slip casting hole of long floral tube is greater than the degree of depth that the short floral tube stretched into the slip casting hole.
2. The valve type double-perforated pipe back pressure grouting structure of claim 1, wherein: one end of the long perforated pipe and one end of the short perforated pipe are arranged in the slurry hole, and the other ends of the long perforated pipe and the short perforated pipe are connected with two branch ports of the slurry conveying pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222125541.XU CN217897884U (en) | 2022-08-12 | 2022-08-12 | Valve type double-perforated-pipe back-pressure grouting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222125541.XU CN217897884U (en) | 2022-08-12 | 2022-08-12 | Valve type double-perforated-pipe back-pressure grouting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217897884U true CN217897884U (en) | 2022-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222125541.XU Active CN217897884U (en) | 2022-08-12 | 2022-08-12 | Valve type double-perforated-pipe back-pressure grouting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217897884U (en) |
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2022
- 2022-08-12 CN CN202222125541.XU patent/CN217897884U/en active Active
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