CN110847911A - Vertical shaft tunneling construction method for passing through thin quicksand layer - Google Patents
Vertical shaft tunneling construction method for passing through thin quicksand layer Download PDFInfo
- Publication number
- CN110847911A CN110847911A CN201910984022.9A CN201910984022A CN110847911A CN 110847911 A CN110847911 A CN 110847911A CN 201910984022 A CN201910984022 A CN 201910984022A CN 110847911 A CN110847911 A CN 110847911A
- Authority
- CN
- China
- Prior art keywords
- shaft
- quicksand
- layer
- sand
- sand blocking
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/08—Sinking shafts while moving the lining downwards
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/10—Preparation of the ground
- E21D1/105—Preparation of the ground by water level modification
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
Abstract
The invention discloses a vertical shaft tunneling construction method for passing through a thin quicksand layer, which comprises the following steps: a. digging a water pit, collecting water gushing from a working surface and discharging the water outside by using a pump; b. a plurality of sand blocking piles arranged around a shaft of the vertical shaft are driven into a quicksand layer in a direction deviating to the outer side of the shaft, so that the plurality of sand blocking piles form a cylindrical shaft wall with a thin upper part and a thick lower part; c. excavating quicksand on the inner side of a cylindrical well wall formed by a plurality of sand blocking piles to form a well shaft with a certain height; d. processing a permanent support on the inner side of the sand blocking pile by adopting concrete; e. and (d) repeating the steps a to d below the processed permanent support until the construction of the shaft in the quicksand layer is completed. The invention utilizes the sand blocking piles and the concrete to construct supports layer by layer, prevents the sand outside the shaft from flowing into the shaft, and compared with the traditional freezing method and the drilling method, the invention not only can ensure the normal operation of shaft construction, but also can greatly improve the construction efficiency and reduce the construction cost, and is particularly suitable for excavating the shaft in a thin sand layer.
Description
Technical Field
The invention relates to a method capable of quickly excavating a vertical shaft in a thin flowing sand layer, and belongs to the technical field of mining.
Background
In the construction process of the vertical shaft, a quicksand layer is often encountered, if the quicksand in the vertical shaft is excavated by using a common method, the quicksand outside the vertical shaft flows into the vertical shaft, and the more the quicksand is collapsed, the more the quicksand is collapsed, the construction task can not be smoothly completed. For thick or super-thick flowing sand layers, the freezing method or the drilling method is generally adopted for construction at present; for the thin quicksand layer, if the freezing method or the drilling method is used for construction, the construction cost can be greatly increased, and the construction period is prolonged, so that an economic, rapid and safe vertical shaft construction method suitable for the thin quicksand layer is very necessary.
Disclosure of Invention
The invention aims to provide a vertical shaft tunneling construction method for passing through a thin quicksand layer aiming at the defects of the prior art so as to improve the construction efficiency of a vertical shaft and reduce the construction cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a shaft tunneling construction method for passing through a thin quicksand layer comprises the following steps:
a. digging a water pit at a construction site, collecting water gushing from a working surface in a centralized manner, and discharging the water gushing out by using a pump to reduce the water level of the working surface;
b. a plurality of sand blocking piles arranged around a shaft of the vertical shaft are driven into a quicksand layer in a direction deviating to the outer side of the shaft, so that the plurality of sand blocking piles form a cylindrical shaft wall with a thin upper part and a thick lower part;
c. excavating quicksand on the inner side of a cylindrical well wall formed by a plurality of sand blocking piles to form a well shaft with a certain height;
d. processing a permanent support on the inner side of the sand blocking pile by adopting concrete;
e. and (d) repeating the steps a to d below the processed permanent support until the construction of the shaft in the quicksand layer is completed.
In the shaft tunneling construction method for the over-thin quicksand layer, in the process of excavating quicksand in the shaft, if the quicksand outside the shaft flows into the shaft from the gap between the adjacent sand blocking piles, sand blocking objects are filled in the gap between the adjacent sand blocking piles to prevent the quicksand outside the shaft from flowing into the shaft.
In the shaft tunneling construction method for the over-thin quicksand layer, the included angle between the sand blocking pile and the shaft axis is 5 degrees.
In the shaft tunneling construction method for the thin quicksand layer, the sand blocking object is straw.
According to the shaft tunneling construction method for the over-thin quicksand layer, the sand blocking pile is a channel steel.
The invention utilizes the sand blocking piles and the concrete to construct supports on the well wall layer by layer, prevents the sand flowing out of the well from flowing into the well, and compared with the traditional freezing method and the drilling method, the invention not only can ensure the normal operation of the shaft construction, but also can greatly improve the construction efficiency and reduce the construction cost, and is particularly suitable for excavating the shaft in a thin sand flowing layer.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Figure 1 is a cross-sectional view of a shaft excavated by the present method;
fig. 2 is a sectional view a-a.
The reference numbers in the figures are as follows: 1. concrete, 2, sand blocking piles, 3 and a well wall.
Detailed Description
The invention provides a shaft tunneling construction method for passing through a thin flowing sand layer. The method comprises the steps of excavating a water pit to collect water gushing from a working surface in a centralized manner, discharging the water gushing by a pump to reduce the water level, driving sand blocking piles 2 made of channel steel into a sand layer at a certain angle deviated from the outside of a shaft of the shaft, forming a circular shaft wall by the channel steel connected with each other to form a forepoling, excavating sand flowing in the shaft, filling partial gaps in the channel steel connected with each other by straws in the excavating process to prevent the sand flowing out of the shaft from flowing into the shaft, and adopting concrete (concrete) to carry out permanent shoring in time after the shaft with a certain height is formed.
The method comprises the following specific steps:
1. when the construction is carried out on a quicksand layer, firstly, a water pit is dug to collect water gushing from the working surface in a centralized way, and the water gushing is discharged by a pump to reduce the water level.
2. And then, along the contour line of the shaft of the vertical shaft, a plurality of sand blocking piles 2 formed by 16 a-shaped channel steel with the length of 2.0m are obliquely and outwards driven into a sand layer, the included angle between the sand blocking piles 2 and the shaft axis of the vertical shaft is 5 degrees, and 200-300 mm outcrops are left at the upper ends of the channel steel to play a role in supporting the wall of the concrete supporting shaft. The lower end of the 16a channel steel is pointed, so that a flowing sand layer can be effectively tamped.
3. And after the first channel steel is constructed, excavating is started, partial gaps in the middle of the adjacent channel steels are filled with straws, the excavating and the filling are carried out simultaneously, and the excavating is stopped when the excavating depth reaches 1.5 m.
4. And after a shaft with the depth of 1.5m is formed, concrete is adopted for permanent support in time.
The above construction process is a cycle. This cycle is repeated until the wellbore has penetrated the quicksand layer.
Compared with a freezing method or a drilling method, the method can simplify the construction process, shorten the construction period, greatly reduce the construction cost and realize economic, quick and safe construction under the condition of the thin quicksand stratum.
Claims (5)
1. A vertical shaft tunneling construction method for passing through a thin quicksand layer is characterized by comprising the following steps:
a. digging a water pit at a construction site, collecting water gushing from a working surface in a centralized manner, and discharging the water gushing out by using a pump to reduce the water level of the working surface;
b. a plurality of sand blocking piles (2) arranged around a shaft of a vertical shaft are driven into a flowing sand layer in a direction deviating from the outer side of the shaft, so that the plurality of sand blocking piles (2) form a cylindrical shaft wall with a thin upper part and a thick lower part;
c. excavating the quicksand on the inner side of a cylindrical well wall formed by a plurality of sand blocking piles (2) to form a shaft with a certain height;
d. processing a permanent support on the inner side of the sand blocking pile (2) by adopting concrete (1);
e. and (d) repeating the steps a to d below the processed permanent support until the construction of the shaft in the quicksand layer is completed.
2. A shaft excavation construction method for a through-thin quicksand layer as claimed in claim 1, characterized in that during excavation of quicksand in the shaft, if the quicksand outside the shaft flows into the shaft from the gap between the adjacent sand blocking piles (2), the gap between the adjacent sand blocking piles (2) is filled with sand blocking objects to prevent the flowing sand outside the shaft from flowing into the shaft.
3. A shaft driving construction method for passing through a thin quicksand layer according to claim 1 or 2, characterized in that the angle between the sand blocking pile (2) and the shaft axis is 5 degrees.
4. A method as claimed in claim 3 wherein the sand guard is straw.
5. A shaft excavation construction method for a thin quicksand layer as claimed in claim 4, characterized in that the sand blocking piles (2) are channel steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984022.9A CN110847911A (en) | 2019-10-16 | 2019-10-16 | Vertical shaft tunneling construction method for passing through thin quicksand layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984022.9A CN110847911A (en) | 2019-10-16 | 2019-10-16 | Vertical shaft tunneling construction method for passing through thin quicksand layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110847911A true CN110847911A (en) | 2020-02-28 |
Family
ID=69596460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910984022.9A Withdrawn CN110847911A (en) | 2019-10-16 | 2019-10-16 | Vertical shaft tunneling construction method for passing through thin quicksand layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110847911A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594176A (en) * | 2020-07-20 | 2020-08-28 | 中国铁建重工集团股份有限公司 | Vertical shaft tunneling construction method and vertical shaft structure aiming at gobi geological environment |
| CN112780279A (en) * | 2021-02-26 | 2021-05-11 | 兰州有色冶金设计研究院有限公司 | Construction method for over-thick large gravel layer of vertical shaft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051226A (en) * | 1990-12-18 | 1991-05-08 | 鹤壁矿务局工程处 | Displacement grouting process for aven shaft sinking through quick sand layer |
| CN201687480U (en) * | 2010-08-19 | 2010-12-29 | 李明 | Vertical shaft penetrating thick soft soil layer integral butting steel protecting tube |
| JP2016180215A (en) * | 2015-03-23 | 2016-10-13 | 大成建設株式会社 | Water cut-off structure at entrance |
| JP6432865B2 (en) * | 2015-04-27 | 2018-12-05 | 株式会社推研 | How to collect excavators |
-
2019
- 2019-10-16 CN CN201910984022.9A patent/CN110847911A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051226A (en) * | 1990-12-18 | 1991-05-08 | 鹤壁矿务局工程处 | Displacement grouting process for aven shaft sinking through quick sand layer |
| CN201687480U (en) * | 2010-08-19 | 2010-12-29 | 李明 | Vertical shaft penetrating thick soft soil layer integral butting steel protecting tube |
| JP2016180215A (en) * | 2015-03-23 | 2016-10-13 | 大成建設株式会社 | Water cut-off structure at entrance |
| JP6432865B2 (en) * | 2015-04-27 | 2018-12-05 | 株式会社推研 | How to collect excavators |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594176A (en) * | 2020-07-20 | 2020-08-28 | 中国铁建重工集团股份有限公司 | Vertical shaft tunneling construction method and vertical shaft structure aiming at gobi geological environment |
| CN112780279A (en) * | 2021-02-26 | 2021-05-11 | 兰州有色冶金设计研究院有限公司 | Construction method for over-thick large gravel layer of vertical shaft |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200228 |