CN204327189U - Precipitation system in low-permeability silty-fine sand stratum tunnel - Google Patents
Precipitation system in low-permeability silty-fine sand stratum tunnel Download PDFInfo
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- CN204327189U CN204327189U CN201420782167.3U CN201420782167U CN204327189U CN 204327189 U CN204327189 U CN 204327189U CN 201420782167 U CN201420782167 U CN 201420782167U CN 204327189 U CN204327189 U CN 204327189U
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- drop water
- well point
- light well
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- 238000001556 precipitation Methods 0.000 title claims description 29
- 239000004576 sand Substances 0.000 title abstract description 4
- 238000009412 basement excavation Methods 0.000 claims abstract description 39
- 230000005484 gravity Effects 0.000 claims abstract description 30
- 241001365789 Oenanthe crocata Species 0.000 claims description 102
- 238000000926 separation method Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005086 pumping Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000391 smoking effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model relates to the technical field of tunnel construction, in particular to a low-permeability silty-fine sand stratum tunnel internal dewatering system, which comprises an advanced horizontal vacuum dewatering pipe, a top vacuum dewatering pump, a light well point vacuum dewatering pipe, a light well point vacuum dewatering pump, a gravity type vacuum dewatering well, a bottom vacuum dewatering pump and a submersible pump; pumping moisture near the excavation contour line of the tunnel face along the longitudinal direction of the tunnel through an advanced horizontal vacuum dewatering pipe and a top vacuum dewatering pump; pumping moisture on the outer side of an excavation contour line of a tunnel face along the transverse direction of the tunnel through a light well point vacuum dewatering pipe and a light well point vacuum dewatering pump; the water near the bottom of the excavation contour line of the tunnel face is sucked into the gravity type vacuum dewatering well and then discharged through the submersible pump; finally, the purpose of reducing the water content of surrounding rocks in the tunnel and around the tunnel is achieved, and the stability of the surrounding rocks is improved.
Description
Technical field
The utility model relates to technical field of tunnel construction, particularly relates to precipitation system in a kind of hypotonicity thin silt tunnel.
Background technology
Usually, in tunnel excavation process, the scope of operation of tunnel excavation is tunnel tunnel face, and in tunnel excavation process, in tunnel, precipitation is for reducing country rock moisture content in tunnel excavation outline line, is beneficial to stable being convenient to of tunnel surrounding and excavates.When tunnel groundwater bit comparison height, need to carry out precipitation in tunnel, reduce country rock moisture content in tunnel, the moisture content of country rock within outline excavation in stratum, place, tunnel is reduced and makes country rock have self-stability, thus reach reduction construction risk, improve the method for efficiency of construction.In constructing tunnel, when running into rich water geological condition, the following two kinds of methods of general employing: is adopt light well point to carry out precipitation in tunnel, but moulds in shape stratum at the rich pigment fine sand stream that transmission coefficient is less, and precipitation effective range can not meet construction demand; Two is adopt gravity deep-well, and the method moulds shape stratum at the rich pigment fine sand stream that transmission coefficient is less, and to there is the precipitation time cycle longer, has a strong impact on Tunnel Construction Schedule, cause meeting safety for tunnel engineering and construction period.
Therefore, for above deficiency, the utility model provides precipitation system in a kind of hypotonicity thin silt tunnel.
Utility model content
(1) technical problem that will solve
The purpose of this utility model is to provide precipitation system in a kind of hypotonicity thin silt tunnel to reduce the water content of hypotonicity thin silt country rock and to improve the stability of country rock.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides precipitation system in a kind of hypotonicity thin silt tunnel, and it comprises advanced levels vacuum drop water pipe, top vacuum drop water pump, light well point vacuum drop water pipe, light well point vacuum drop water pump, gravity vacuum drop well, bottom vacuum dewatering pump and submersible pump; Advanced levels vacuum drop water pipe is longitudinally arranged along tunnel on the excavation contour line of tunnel tunnel face, and advanced levels vacuum drop water pipe is connected with top vacuum drop water pump; Light well point vacuum drop water pipe is tilted to lower setting in the outside of tunnel tunnel face excavation contour line along tunnel lateral direction, and light well point vacuum drop water pipe is connected with light well point vacuum drop water pump; The two bottom sides being arranged on tunnel tunnel face excavation contour line closed by described gravity vacuum drop well, described gravity vacuum drop well is communicated with bottom vacuum dewatering pump by tube connector, described submersible pump is arranged in described gravity vacuum drop well, and is connected with the gutter be located in described gravity vacuum drop well.
Wherein, many described advanced levels vacuum drop water pipes are arranged along tunnel longitudinal separation, and many described advanced levels vacuum drop water pipes are all connected with top vacuum drop water pump.
Wherein, described light well point vacuum drop water pipe comprises top light well point vacuum drop water pipe and middle part light well point vacuum drop water pipe, light well point vacuum drop water pump comprises top light well point vacuum drop water pump and middle part light well point vacuum drop water pump, and described top light well point vacuum drop water pipe is connected with top light well point vacuum drop water pump and middle part light well point vacuum drop water pump respectively with middle part light well point vacuum drop water pipe.
Wherein, described top light well point vacuum drop water pipe is tilted to lower setting in the upper outside of tunnel tunnel face excavation contour line along tunnel lateral direction.
Wherein, described middle part light well point vacuum drop water pipe is tilted to lower setting along tunnel lateral direction outside the middle part of tunnel tunnel face excavation contour line.
Wherein, respectively multiple gravity vacuum drop well is set along longitudinal direction interval, tunnel in the two bottom sides of the excavation contour line of tunnel tunnel face.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages: the utility model in precipitation system, can be aspirated the moisture near the excavation contour line along the longitudinal tunnel tunnel face in tunnel by advanced levels vacuum drop water pipe and top vacuum drop water pump in hypotonicity thin silt tunnel; Moisture outside excavation contour line along tunnel lateral direction tunnel tunnel face can be aspirated by light well point vacuum drop water pipe and light well point vacuum drop water pump; Be communicated with gravity vacuum drop well by bottom vacuum dewatering pump, the moisture near the bottom of the excavation contour line of tunnel tunnel face be drawn in gravity vacuum drop well, then discharged by submersible pump; Above-mentioned various Smoking regime combines the water content that can reduce hypotonicity thin silt country rock, reaches the object reducing tunnel surrounding water content, improves the stability of country rock, reduce tunnel excavation construction risk, and effectively improve construction speed.
Accompanying drawing explanation
Fig. 1 is the structural representation of precipitation system in the utility model embodiment hypotonicity thin silt tunnel.
In figure, 1: advanced levels vacuum drop water pipe; 2: top light well point vacuum drop water pipe; 3: middle part light well point vacuum drop water pipe; 4: gravity vacuum drop well; 5: top vacuum drop water pump; 6: top light well point vacuum drop water pump; 7: middle part light well point vacuum drop water pump; 8: bottom vacuum dewatering pump; 9: submersible pump; 10: tube connector; 11: gutter.
Detailed description of the invention
Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, in the hypotonicity thin silt tunnel that provides of the utility model, precipitation system comprises advanced levels vacuum drop water pipe 1, top vacuum drop water pump 5, top light well point vacuum drop water pipe 2, middle part light well point vacuum drop water pipe 3, top light well point vacuum drop water pump 6, middle part light well point vacuum drop water pump 7, gravity vacuum drop well 4, bottom vacuum dewatering pump 8 and submersible pump 9, the excavation contour line of tunnel tunnel face is arranged at intervals with advanced levels vacuum drop water pipe 1 along tunnel longitudinal direction, advanced levels vacuum drop water pipe 1 and top vacuum drop water pump 5 link together, top light well point vacuum drop water pipe 2 is arranged at intervals with along tunnel lateral direction direction on the top of the excavation contour line of tunnel tunnel face, namely top light well point vacuum drop water pipe 2 is extended laterally by the top of excavation contour line to form, top light well point vacuum drop water pipe 2 is tilted to lower setting, top light well point vacuum drop water pipe 2 and top light well point vacuum drop water pump link together, be arranged at intervals with middle part light well point vacuum drop water pipe 3 along tunnel lateral direction direction at the middle part of the excavation contour line of tunnel tunnel face, namely middle part light well point vacuum drop water pipe 3 is extended laterally by the middle part of excavation contour line to form, middle part light well point vacuum drop water pipe 3 is tilted to lower setting, middle part light well point vacuum drop water pipe 3 links together with middle part light well point vacuum drop water pump, closed gravity vacuum drop well 4 is provided with in the bottom of the excavation contour line of tunnel tunnel face, submersible pump 9 is provided with in gravity vacuum drop well 4, submersible pump 9 is connected with gutter 11, so that the water in gravity vacuum drop well 4 is discharged, bottom vacuum dewatering pump 8 is communicated with gravity vacuum drop well 4 by tube connector 10.
In above-described embodiment, can the moisture near the excavation contour line along the longitudinal tunnel tunnel face in tunnel be aspirated by advanced levels vacuum drop water pipe 1 and top vacuum drop water pump 5; Can be aspirated the moisture of the upper outside of the excavation contour line along tunnel lateral direction tunnel tunnel face by top light well point vacuum drop water pipe 2 and well point, top vacuum drop water pump 6; Moisture outside the middle part of the excavation contour line along tunnel lateral direction tunnel tunnel face can be aspirated by middle part light well point vacuum drop water pipe 3 and middle part light well point vacuum drop water pump 7; Be communicated with gravity vacuum drop well 4 by bottom vacuum dewatering pump 8, the moisture near the bottom of the excavation contour line of tunnel tunnel face be drawn in gravity vacuum drop well 4, then discharged by submersible pump 9; Above-mentioned various Smoking regime combines the water content that can reduce hypotonicity thin silt country rock, reaches the object reducing tunnel surrounding water content.
Further, be arranged at intervals with multiple closed gravity vacuum drop well 4 along tunnel longitudinal direction respectively in the two bottom sides of the excavation contour line of tunnel tunnel face, thus can further improve the effect of precipitation in hypotonicity thin silt tunnel.
In order to understand precipitation system in hypotonicity thin silt tunnel of the present invention better, the method utilizing precipitation system in above-mentioned tunnel to carry out precipitation in tunnel can comprise the following steps:
S1, to fill more than end face at tunnel tunnel face inverted arch and apply advanced levels vacuum drop water pipe 1 along longitudinal direction interval, tunnel, each advanced levels vacuum drop water pipe 1 all links together with top vacuum drop water pump 5, starts top vacuum drop water pump 5 and carries out the operation of precipitation pump drainage;
S2, apply top light well point vacuum drop water pipe 2 on the top of the excavation contour line of tunnel tunnel face along interval, tunnel lateral direction direction, top light well point vacuum drop water pipe 2 is tilted to down and applies, top light well point vacuum drop water pipe 2 is connected with top light well point vacuum drop water pump, starts top light well point vacuum drop water pump and carry out the operation of precipitation pump drainage;
S3, to apply middle part light well point vacuum drop water pipe 3 along interval, tunnel lateral direction direction at the middle part of the excavation contour line of tunnel tunnel face, middle part light well point vacuum drop water pipe 3 is tilted to down and applies, middle part light well point vacuum drop water pipe 3 is connected with middle part light well point vacuum drop water pump, starts middle part light well point vacuum drop water pump and carry out the operation of precipitation pump drainage;
S4, apply closed gravity vacuum drop well 4 in the bottom of the excavation contour line of tunnel tunnel face, submersible pump 9 is placed in gravity vacuum drop well 4, bottom vacuum dewatering pump 8 is communicated with gravity vacuum drop well 4 by tube connector 10, and unlatching bottom vacuum dewatering pump 8 and submersible pump 9 carry out the operation of precipitation pump drainage simultaneously.
In sum, in the hypotonicity thin silt tunnel that the utility model provides in precipitation system, effectively can be reduced the water content of country rock in hypotonicity thin silt tunnel by advanced levels vacuum drop water pipe 1, top light well point vacuum drop water pipe 2, middle part light well point vacuum drop water pipe 3 and gravity vacuum drop well 4, improve the stability of country rock, reduce tunnel excavation construction risk, and effectively improve construction speed.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (6)
1. a precipitation system in hypotonicity thin silt tunnel, is characterized in that: it comprises advanced levels vacuum drop water pipe, top vacuum drop water pump, light well point vacuum drop water pipe, light well point vacuum drop water pump, gravity vacuum drop well, bottom vacuum dewatering pump and submersible pump; Advanced levels vacuum drop water pipe is longitudinally arranged along tunnel on the excavation contour line of tunnel tunnel face, and advanced levels vacuum drop water pipe is connected with top vacuum drop water pump; Light well point vacuum drop water pipe is tilted to lower setting in the outside of tunnel tunnel face excavation contour line along tunnel lateral direction, and light well point vacuum drop water pipe is connected with light well point vacuum drop water pump; The two bottom sides being arranged on tunnel tunnel face excavation contour line closed by described gravity vacuum drop well, described gravity vacuum drop well is communicated with bottom vacuum dewatering pump by tube connector, described submersible pump is arranged in described gravity vacuum drop well, and is connected with the gutter be located in described gravity vacuum drop well.
2. precipitation system in hypotonicity thin silt tunnel according to claim 1, it is characterized in that: many described advanced levels vacuum drop water pipes are arranged along tunnel longitudinal separation, and many described advanced levels vacuum drop water pipes are all connected with top vacuum drop water pump.
3. precipitation system in hypotonicity thin silt tunnel according to claim 2, it is characterized in that: described light well point vacuum drop water pipe comprises top light well point vacuum drop water pipe and middle part light well point vacuum drop water pipe, light well point vacuum drop water pump comprises top light well point vacuum drop water pump and middle part light well point vacuum drop water pump, and described top light well point vacuum drop water pipe is connected with top light well point vacuum drop water pump and middle part light well point vacuum drop water pump respectively with middle part light well point vacuum drop water pipe.
4. precipitation system in hypotonicity thin silt tunnel according to claim 3, is characterized in that: described top light well point vacuum drop water pipe is tilted to lower setting in the upper outside of tunnel tunnel face excavation contour line along tunnel lateral direction.
5. precipitation system in hypotonicity thin silt tunnel according to claim 3, is characterized in that: described middle part light well point vacuum drop water pipe is tilted to lower setting along tunnel lateral direction outside the middle part of tunnel tunnel face excavation contour line.
6. precipitation system in hypotonicity thin silt tunnel according to claim 1, is characterized in that: arrange multiple gravity vacuum drop well along longitudinal direction interval, tunnel respectively in the two bottom sides of the excavation contour line of tunnel tunnel face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420782167.3U CN204327189U (en) | 2014-12-11 | 2014-12-11 | Precipitation system in low-permeability silty-fine sand stratum tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420782167.3U CN204327189U (en) | 2014-12-11 | 2014-12-11 | Precipitation system in low-permeability silty-fine sand stratum tunnel |
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| CN204327189U true CN204327189U (en) | 2015-05-13 |
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| CN201420782167.3U Active CN204327189U (en) | 2014-12-11 | 2014-12-11 | Precipitation system in low-permeability silty-fine sand stratum tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454001A (en) * | 2014-12-11 | 2015-03-25 | 中铁十九局集团有限公司 | Dewatering system and dewatering method in tunnel of low-permeability silty-fine sand stratum |
| CN110985120A (en) * | 2019-12-31 | 2020-04-10 | 中铁十六局集团北京轨道交通工程建设有限公司 | Precipitation construction method and system for tunnel connection channel of fractured clay layer |
-
2014
- 2014-12-11 CN CN201420782167.3U patent/CN204327189U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454001A (en) * | 2014-12-11 | 2015-03-25 | 中铁十九局集团有限公司 | Dewatering system and dewatering method in tunnel of low-permeability silty-fine sand stratum |
| CN110985120A (en) * | 2019-12-31 | 2020-04-10 | 中铁十六局集团北京轨道交通工程建设有限公司 | Precipitation construction method and system for tunnel connection channel of fractured clay layer |
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