CN104454001A - Dewatering system and dewatering method in tunnel of low-permeability silty-fine sand stratum - Google Patents
Dewatering system and dewatering method in tunnel of low-permeability silty-fine sand stratum Download PDFInfo
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- CN104454001A CN104454001A CN201410768963.6A CN201410768963A CN104454001A CN 104454001 A CN104454001 A CN 104454001A CN 201410768963 A CN201410768963 A CN 201410768963A CN 104454001 A CN104454001 A CN 104454001A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004576 sand Substances 0.000 title abstract description 4
- 238000001556 precipitation Methods 0.000 claims abstract description 51
- 238000009412 basement excavation Methods 0.000 claims abstract description 45
- 230000005484 gravity Effects 0.000 claims abstract description 36
- 241001365789 Oenanthe crocata Species 0.000 claims description 130
- 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
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 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
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of tunnel construction, in particular to a precipitation system and a precipitation method in a tunnel of a low-permeability fine sand stratum, which comprises an advanced horizontal vacuum precipitation pipe, a top vacuum precipitation pump, a light well point vacuum precipitation pipe, a light well point vacuum precipitation pump, a gravity type vacuum precipitation well, a bottom vacuum precipitation 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 present invention relates to technical field of tunnel construction, particularly relate to precipitation system and precipitation method 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 invention provides precipitation system and precipitation method in a kind of hypotonicity thin silt tunnel.
Summary of the invention
(1) technical problem that will solve
To the object of this invention is to provide in a kind of hypotonicity thin silt tunnel precipitation system and precipitation method 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, one aspect of the present invention 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 bottom 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 well light-duty some 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.
In the hypotonicity thin silt tunnel that the present invention provides on the other hand, precipitation method comprises the following steps:
S1, to fill more than end face at tunnel tunnel face inverted arch and apply advanced levels vacuum drop water pipe along longitudinal direction interval, tunnel, each advanced levels vacuum drop water pipe all links together with top vacuum drop water pump, starts top vacuum drop water pump and carries out the operation of precipitation pump drainage;
S2, apply top light well point vacuum drop water pipe 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 is tilted to down and applies, top light well point vacuum drop water pipe 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 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 is tilted to down and applies, middle part light well point vacuum drop water pipe is connected with middle part light well point vacuum drop water pump, starts middle part vacuum drop water pump and carry out the operation of precipitation pump drainage;
S4, apply closed gravity vacuum drop well in the bottom of the excavation contour line of tunnel tunnel face, submersible pump is placed in gravity vacuum drop well, bottom vacuum dewatering pump is communicated with gravity vacuum drop well by tube connector, and unlatching bottom vacuum dewatering pump and submersible pump carry out the operation of precipitation pump drainage simultaneously.
(3) beneficial effect
Technique scheme tool of the present invention has the following advantages: in hypotonicity thin silt tunnel of the present invention in precipitation system and precipitation method, can be aspirated by advanced levels vacuum drop water pipe and top vacuum drop water pump to the moisture near the excavation contour line along the longitudinal tunnel tunnel face in 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 embodiment of the present invention 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, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, in hypotonicity thin silt tunnel provided by the invention, 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 6 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 7, 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 top light well point 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.
With precipitation system in above-mentioned hypotonicity thin silt tunnel correspondingly, precipitation method in the hypotonicity thin silt tunnel that the present invention provides on the other hand, it comprises 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 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 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 hypotonicity thin silt tunnel provided by the invention in precipitation system and precipitation method, 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 the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (7)
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.
7. a precipitation method in hypotonicity thin silt tunnel, it is characterized in that, it comprises the following steps:
S1, to fill more than end face at tunnel tunnel face inverted arch and apply advanced levels vacuum drop water pipe along longitudinal direction interval, tunnel, each advanced levels vacuum drop water pipe all links together with top vacuum drop water pump, starts top vacuum drop water pump and carries out the operation of precipitation pump drainage;
S2, apply top light well point vacuum drop water pipe 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 is tilted to down and applies, top light well point vacuum drop water pipe 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 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 is tilted to down and applies, middle part light well point vacuum drop water pipe 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 in the bottom of the excavation contour line of tunnel tunnel face, submersible pump is placed in gravity vacuum drop well, bottom vacuum dewatering pump is communicated with gravity vacuum drop well by tube connector, and unlatching bottom vacuum dewatering pump and submersible pump carry out the operation of precipitation pump drainage simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768963.6A CN104454001A (en) | 2014-12-11 | 2014-12-11 | Dewatering system and dewatering method in tunnel of low-permeability silty-fine sand stratum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768963.6A CN104454001A (en) | 2014-12-11 | 2014-12-11 | Dewatering system and dewatering method in tunnel of low-permeability silty-fine sand stratum |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484791A (en) * | 2016-01-16 | 2016-04-13 | 中铁十九局集团第二工程有限公司 | Comprehensive tunnel drainage, precipitation and pressure reduction construction method |
| CN105986836A (en) * | 2016-06-14 | 2016-10-05 | 中铁隧道勘测设计院有限公司 | Single-line railway tunnel substrate waterproof and drainage reinforcing system |
| CN106917626A (en) * | 2017-05-04 | 2017-07-04 | 西安理工大学 | Dewatering construction method in double side wall hole based on saturated loess |
| 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 |
| CN113217097A (en) * | 2021-05-19 | 2021-08-06 | 中国建筑第二工程局有限公司 | Deep open type comprehensive dewatering method and water pumping device for subsurface tunnel in water-rich composite stratum |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105484791A (en) * | 2016-01-16 | 2016-04-13 | 中铁十九局集团第二工程有限公司 | Comprehensive tunnel drainage, precipitation and pressure reduction construction method |
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| 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 |
| CN113217097A (en) * | 2021-05-19 | 2021-08-06 | 中国建筑第二工程局有限公司 | Deep open type comprehensive dewatering method and water pumping device for subsurface tunnel in water-rich composite stratum |
| CN113217097B (en) * | 2021-05-19 | 2022-06-24 | 中国建筑第二工程局有限公司 | Deep open type comprehensive dewatering method and water pumping device for subsurface tunnel in water-rich composite stratum |
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Application publication date: 20150325 |