CN111878086A - Peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction - Google Patents
Peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction Download PDFInfo
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- CN111878086A CN111878086A CN202010752255.9A CN202010752255A CN111878086A CN 111878086 A CN111878086 A CN 111878086A CN 202010752255 A CN202010752255 A CN 202010752255A CN 111878086 A CN111878086 A CN 111878086A
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- 238000010276 construction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 title claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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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
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
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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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- Geochemistry & Mineralogy (AREA)
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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The peripheral construction channel arrangement method based on the karst cave underground river environment tunnel construction comprises the following steps of S1: constructing a first channel to enable the first channel to be communicated with the tunnel A section and the karst cave; s2: constructing a second channel to enable the second channel to be communicated with the karst cave and the transverse cave; s3: constructing a third channel to communicate the third channel with the upper stream of the underground river; s4: constructing a fourth channel to enable the fourth channel to be communicated with the karst cave and the second channel; s5: constructing a fifth channel to enable the fifth channel to be communicated with the karst cave and the downstream of the underground river; s6: constructing a sixth channel to enable the sixth channel to be communicated with the karst cave and the second channel; s7: constructing a seventh channel to enable the seventh channel to be communicated with the karst cave and the second channel; s8: constructing an eighth channel to enable the eighth channel to be communicated with the second channel and the outside; s9: constructing a ninth channel, and enabling the ninth channel to be communicated with the tunnel section B and the second channel; s10: and constructing a ten-channel to enable the ten-channel to be communicated with the tunnel section B and the karst cave. Has the advantages of reasonable arrangement, convenient construction and capability of improving the operation safety of the line.
Description
Technical Field
The invention mainly relates to a tunnel construction technology of a karst cave underground river environment, in particular to a peripheral construction channel arrangement method based on tunnel construction of the karst cave underground river environment.
Background
The Yujing mountain tunnel is located in Wexin county of Yunnan province, has the total length of 6306m and is a double-line tunnel. In 2016, 7, 23 days, a cave is detected by drilling a hole in advance on the small-mileage end face of a cross-cave working area, and a huge cave hall and a river are discovered after the cave is revealed. The karst cave is about 230m in transverse length and about 93m in width and is approximately rectangular, the top of the karst cave is in a vault shape, the vertical heights of halls are different from 50 m to 130m, the right side of the karst cave in the line direction is high, and the left side of the karst cave is low; and a river develops at the slope toe at the left side of the karst cave, and the river surface is 5-15 m wide. The tunnel passes through the huge karst cave hall, the two sides of the huge karst cave hall are provided with a tunnel section A, and the tunnel passes through the karst cave hall and is provided with a tunnel section B.
Because the tunnel needs to pass through a huge karst cave hall and the bottom is provided with a river, high risks are brought to early construction and later operation, such as block falling at the top of the karst cave, sinking at the bottom due to the river and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction, which is reasonable in arrangement, convenient to construct and capable of improving the line operation safety.
In order to solve the technical problems, the invention adopts the following technical scheme:
a peripheral construction channel arrangement method based on tunnel construction of a karst cave and a river under the environment of the karst cave is disclosed, wherein the environment comprises the karst cave and the river at the bottom of the karst cave, the tunnels at two ends of the karst cave penetrate through the karst cave, namely a tunnel A section, and the tunnels penetrating through the karst cave are tunnel B sections; the construction method comprises the following steps:
s1: constructing a first channel to enable the first channel to be communicated with the main tunnel and the karst cave of the section A of the tunnel;
s2: constructing a second channel to enable the second channel to be communicated with the karst cave and the transverse cave;
s3: constructing a third channel to communicate the third channel with the upper stream of the underground river;
s4: constructing a fourth channel to enable the fourth channel to be communicated with the karst cave and the second channel;
s5: constructing a fifth channel to enable the fifth channel to be communicated with the karst cave and the downstream of the underground river;
s6: constructing a sixth channel to enable the sixth channel to be communicated with the karst cave and the second channel;
s7: constructing a seventh channel to enable the seventh channel to be communicated with the karst cave and the second channel;
s8: constructing an eighth channel to enable the eighth channel to be communicated with the second channel and the outside;
s9: constructing a ninth channel, and enabling the ninth channel to be communicated with the tunnel section B and the second channel;
s10: and constructing a ten-channel to enable the ten-channel to be communicated with the tunnel section B and the karst cave.
As a further improvement of the above technical solution:
the elevations of the fifth channel, the sixth channel, the seventh channel and the eighth channel are sequentially increased.
The junction of the fourth channel and the underground river is positioned at the downstream of the junction of the third channel and the underground river.
And the channel IV and the channel III are intersected.
And the third channel, the fourth channel and the fifth channel are intersected.
And when all the channels are constructed, excavating and supporting at the same time, and implementing lining construction.
Compared with the prior art, the invention has the advantages that:
the invention relates to a peripheral construction channel arrangement method based on tunnel construction of a karst cave underground river environment, which is used for reaching a main tunnel and a karst cave of a tunnel section A through a first channel and serving as a material transportation channel for early exploration and an emergency rescue channel for early exploration construction; the second channel is used as a transportation channel when constructing the third channel, and can also be used as a maintenance channel when in operation; the third channel is used as a drainage tunnel for changing the channel of the underground river; the fourth channel, the fifth channel, the sixth channel and the seventh channel are used as underground river plugging and karst cave backfilling channels; the eighth channel is used as a standby drainage channel, so that the underground river can be quickly drained from the eighth channel and the third channel after the water level of the underground river rises, and the operation safety of a line is ensured; the ninth channel is used as a drainage channel under line operation and bridges. The whole channel is reasonable in arrangement, construction is facilitated, and the safety of line operation is improved.
Drawings
Fig. 1 is a plan view of the cave-underground river environment of the present invention.
Figure 2 is a plan view of the cave river environment of the present invention (with channel number three).
Fig. 3 is a layout diagram of the channels in the present invention.
Fig. 4 is a flow chart of the peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction of the present invention.
The reference numerals in the figures denote:
1. karst cave; 2. a river under the river; 3. a first channel; 4. a second channel; 5. channel three; 6. channel four; 7. a channel number five; 8. a channel number six; 9. a channel number seven; 10. a channel number eight; 11. a channel number nine; 12. channel ten.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
As shown in fig. 1 to 4, an embodiment of the peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction of the present invention includes a karst cave 1 and an underground river 2 located at the bottom of the karst cave 1, the tunnel passes through the karst cave 1, the tunnels at both ends of the karst cave 1 are tunnel a sections, and the tunnel passing through the karst cave 1 is tunnel B sections; the construction method comprises the following steps:
s1: constructing a first channel 3, and enabling the first channel 3 to be communicated with the main tunnel at the section A of the tunnel and the karst cave 1;
s2: constructing a second channel 4, and enabling the second channel 4 to be communicated with the karst cave 1 and the transverse cave;
s3: constructing a third channel 5, and enabling the third channel 5 to be communicated with the upstream of the underground river 2;
s4: constructing a fourth channel 6, and enabling the fourth channel 6 to be communicated with the karst cave 1 and the second channel 4;
s5: constructing a fifth channel 7, and enabling the fifth channel 7 to be communicated with the downstream of the karst cave 1 and the underground river 2;
s6: constructing a sixth channel 8, and enabling the sixth channel 8 to be communicated with the karst cave 1 and the second channel 4;
s7: constructing a seventh channel 9, and enabling the seventh channel 9 to be communicated with the karst cave 1 and the second channel 4;
s8: constructing an eighth channel 10, and enabling the eighth channel 10 to be communicated with the second channel 4 and the outside;
s9: constructing a ninth channel 11, and enabling the ninth channel 11 to be communicated with the tunnel section B and the second channel 4;
s10: and constructing a ten-channel 12, and enabling the ten-channel 12 to be communicated with the tunnel section B and the karst cave 1.
By adopting the method, the tunnel reaches the main tunnel and the karst cave 1 at the section A of the tunnel through the first passage 3 and is used as a material transportation channel for early exploration and an emergency rescue channel for early exploration construction; the second channel 4 is used as a transportation channel when constructing the third channel 5, and can also be used as a maintenance channel when in operation; the third channel 5 is used as a drainage tunnel for changing the channel of the underground river 2; the fourth channel 6, the fifth channel 7, the sixth channel 8 and the seventh channel 9 are used as the plugging of the underground river 2 and the backfill channel of the karst cave 1; the eighth channel 10 serves as a standby drainage channel, so that the water can be quickly drained from the eighth channel 10 and the third channel 5 after the water level of the underground river 2 rises, and the operation safety of a line is ensured; the ninth channel 11 is used as a drainage channel under the line service and bridge. The whole channel is reasonable in arrangement, construction is facilitated, and the safety of line operation is improved.
In this embodiment, the elevations of the fifth channel 7, the sixth channel 8, the seventh channel 9 and the eighth channel 10 are sequentially raised. The karst cave 1 is filled from bottom to top by taking underground river 2 backfill as a basis through a plurality of channels with different elevations, namely the karst cave 1 is subjected to reconstruction treatment, so that the top of the karst cave 1 is prevented from dropping blocks, and the safety is improved
In this embodiment, the junction of the fourth channel 6 and the underground river 2 is located downstream of the junction of the third channel 5 and the underground river 2. The fourth channel 6 is used as a blocking channel and used for blocking the downstream of the junction of the third channel 5 and the underground river 2.
In this embodiment, the fourth lane 6 and the third lane 5 intersect. Set up like this, can observe the rivers condition of No. three passageway 5 and the shutoff condition of 2 upper reaches of underground river through No. four passageways 6, improve the convenience.
In this embodiment, the third passage 5, the fourth passage 6 and the fifth passage 7 intersect. By the arrangement, the construction length and difficulty of the fifth channel 7 can be saved, and the construction cost is reduced.
In this embodiment, when all the passages are constructed, support is performed while excavation is performed, and lining construction is performed. By adopting the mode, the stability and the reliability of the excavated cavern can be ensured.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (6)
1. A peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction is characterized in that the environment comprises a karst cave (1) and an underground river (2) located at the bottom of the karst cave (1), the tunnel penetrates through the karst cave (1), the tunnels at two ends of the karst cave (1) are a tunnel section A, and the tunnel penetrating through the karst cave (1) is a tunnel section B; the construction method comprises the following steps:
s1: constructing a first channel (3) to enable the first channel (3) to be communicated with the tunnel A section main cave and the karst cave (1);
s2: constructing a second channel (4) to enable the second channel (4) to be communicated with the karst cave (1) and the transverse cave;
s3: constructing a third channel (5) to enable the third channel (5) to be communicated with the upstream of the underground river (2);
s4: constructing a fourth channel (6) to enable the fourth channel (6) to be communicated with the karst cave (1) and the second channel (4);
s5: constructing a fifth channel (7), and enabling the fifth channel (7) to be communicated with the downstream of the karst cave (1) and the underground river (2);
s6: constructing a sixth channel (8) to enable the sixth channel (8) to be communicated with the karst cave (1) and the second channel (4);
s7: constructing a seventh channel (9) to enable the seventh channel (9) to be communicated with the karst cave (1) and the second channel (4);
s8: constructing an eighth channel (10) to enable the eighth channel (10) to be communicated with the second channel (4) and the outside;
s9: constructing a ninth channel (11) to enable the ninth channel (11) to be communicated with the tunnel section B and the second channel (4);
s10: and constructing a ten-channel (12) to enable the ten-channel (12) to be communicated with the tunnel section B and the karst cave (1).
2. The peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction of claim 1, characterized in that: the elevations of the fifth channel (7), the sixth channel (8), the seventh channel (9) and the eighth channel (10) are sequentially increased.
3. The peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction of claim 2, characterized in that: the junction of the fourth channel (6) and the underground river (2) is positioned at the downstream of the junction of the third channel (5) and the underground river (2).
4. The peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction of claim 3, characterized in that: the fourth channel (6) and the third channel (5) are intersected.
5. The peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction of claim 4, wherein: the third channel (5), the fourth channel (6) and the fifth channel (7) are intersected.
6. The peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction of claim 5, wherein: and when all the channels are constructed, excavating and supporting at the same time, and implementing lining construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010752255.9A CN111878086A (en) | 2020-07-30 | 2020-07-30 | Peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction |
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| CN202010752255.9A CN111878086A (en) | 2020-07-30 | 2020-07-30 | Peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922300A (en) * | 2010-08-30 | 2010-12-22 | 中铁第四勘察设计院集团有限公司 | Large supporting and protecting system of tunnel in hollow solution cavity |
| CN201771516U (en) * | 2010-08-30 | 2011-03-23 | 中铁第四勘察设计院集团有限公司 | Supporting structure of district passing through cavern and underground river for tunnel |
| CN102251777A (en) * | 2011-05-31 | 2011-11-23 | 中铁二十局集团第一工程有限公司 | Large-scale karst cavity treatment method for karst tunnel |
| CN104532821A (en) * | 2014-10-29 | 2015-04-22 | 中铁三局集团有限公司 | Extra-large karst cave bottom treatment construction method |
| CN106988758A (en) * | 2017-05-08 | 2017-07-28 | 中铁五局集团第五工程有限责任公司 | One kind is used to pass through large-scale vertical solution cavity group method for tunnel construction |
| CN109630137A (en) * | 2019-01-31 | 2019-04-16 | 中铁十四局集团建筑工程有限公司 | An a kind of tunnel high position passes through the backfill processing construction method of huge molten chamber |
| CN109826081A (en) * | 2019-03-29 | 2019-05-31 | 中交路桥建设有限公司 | Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel |
| CN111411993A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Large-section tunnel supporting system penetrating through huge karst cave hall and construction method |
-
2020
- 2020-07-30 CN CN202010752255.9A patent/CN111878086A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922300A (en) * | 2010-08-30 | 2010-12-22 | 中铁第四勘察设计院集团有限公司 | Large supporting and protecting system of tunnel in hollow solution cavity |
| CN201771516U (en) * | 2010-08-30 | 2011-03-23 | 中铁第四勘察设计院集团有限公司 | Supporting structure of district passing through cavern and underground river for tunnel |
| CN102251777A (en) * | 2011-05-31 | 2011-11-23 | 中铁二十局集团第一工程有限公司 | Large-scale karst cavity treatment method for karst tunnel |
| CN104532821A (en) * | 2014-10-29 | 2015-04-22 | 中铁三局集团有限公司 | Extra-large karst cave bottom treatment construction method |
| CN106988758A (en) * | 2017-05-08 | 2017-07-28 | 中铁五局集团第五工程有限责任公司 | One kind is used to pass through large-scale vertical solution cavity group method for tunnel construction |
| CN109630137A (en) * | 2019-01-31 | 2019-04-16 | 中铁十四局集团建筑工程有限公司 | An a kind of tunnel high position passes through the backfill processing construction method of huge molten chamber |
| CN109826081A (en) * | 2019-03-29 | 2019-05-31 | 中交路桥建设有限公司 | Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel |
| CN111411993A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Large-section tunnel supporting system penetrating through huge karst cave hall and construction method |
Non-Patent Citations (1)
| Title |
|---|
| 叶堃: "新建成贵线玉京山隧道岩溶大厅综合治理研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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