CN111022118A - Construction method for dewatering in pile - Google Patents
Construction method for dewatering in pile Download PDFInfo
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- CN111022118A CN111022118A CN201911276678.1A CN201911276678A CN111022118A CN 111022118 A CN111022118 A CN 111022118A CN 201911276678 A CN201911276678 A CN 201911276678A CN 111022118 A CN111022118 A CN 111022118A
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- constructing
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- transverse
- hole digging
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- 238000010276 construction Methods 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001556 precipitation Methods 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims 1
- 230000008595 infiltration Effects 0.000 abstract description 3
- 238000001764 infiltration Methods 0.000 abstract description 3
- 239000003673 groundwater Substances 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a construction method for dewatering in a pile, which comprises the following steps: firstly, constructing a precipitation well, completing precipitation, then completing construction of a vertical shaft, then completing construction of at least two first transverse channels, constructing the vertical shaft to the depth of the first transverse channels, then constructing at least two second transverse channels positioned below the first transverse channels, and then constructing a first layer of pilot tunnels for communicating two adjacent first transverse channels; constructing a hole digging pile downwards in the first layer of pilot tunnel, and temporarily sealing the hole digging pile when the hole digging pile penetrates through a soil aquifer; then constructing an inclined shaft at the bottom of the hole digging pile along the direction of the transverse channel, and simultaneously arranging a water suction pump in the inclined shaft to lower the underground water level below a soil aquifer; repeating the step of constructing the transverse passage, and continuously constructing a third transverse passage and a second layer of pilot tunnel below the second transverse passage; and constructing the hole digging pile downwards in the second layer of pilot tunnel until the construction reaches the designed length. Effectively reducing the infiltration problem of groundwater, avoiding land subsidence and reducing the occupation of urban land.
Description
Technical Field
The invention relates to a precipitation construction method for a subway station, in particular to a construction method for applying precipitation in a pile.
Background
In the subway construction process, there are two difficult problems often: firstly, most subways are below the underground water level, so that the subway system has the characteristics of more stations, long routes, long construction time and the like, and the underground water problem in the construction process needs to be solved; then, most subway lines are located in a busy city area with built forests and dense underground pipelines, the problems of traffic, urban land occupation and the like need to be solved in the construction process, and meanwhile, ground settlement needs to be restrained, so that the safety of tall buildings is ensured.
At present, most construction methods are as follows: before the main body of the cavern is excavated, an integral vertical supporting system (composed of a side wall supporting structure and an arch part primary support) is constructed as soon as possible, and the construction stage is generally divided into four stages of small pilot tunnel excavation, beam-column system construction, arch buckling construction and structural main body forming. The construction method has high requirements on underground control, and the operation surface needs to be constructed in a waterless environment, so the construction environment is more strict.
Disclosure of Invention
The invention aims to provide a construction method for dewatering in a pile, which can solve the problem of harsh construction environment requirements, effectively solve the problems of land occupation and land subsidence during urban construction and the problem of infiltration of dewatering during excavation.
In order to solve the problems, the invention provides a construction method for dewatering in a pile, which comprises the following steps: construction of a transverse channel: firstly, constructing a precipitation well, completing precipitation, then completing construction of a vertical shaft, then completing construction of at least two first transverse channels, constructing the vertical shaft to the depth of the first transverse channels, then constructing at least two second transverse channels positioned below the first transverse channels, and then constructing a first layer of pilot tunnels for communicating two adjacent first transverse channels; the construction step of the hole digging pile: constructing a hole digging pile downwards in the first layer of pilot tunnel, and temporarily sealing the hole digging pile when the hole digging pile penetrates through a soil aquifer; construction of an inclined shaft: then constructing an inclined shaft at the bottom of the hole digging pile along the direction of the transverse channel, and simultaneously arranging a water suction pump in the inclined shaft to lower the underground water level below a soil aquifer; repeating the step of constructing the transverse passage, and continuously constructing a third transverse passage and a second layer of pilot tunnel below the second transverse passage; and repeating the construction step of the hole digging pile, and constructing the hole digging pile downwards in the second layer of pilot tunnel until the construction reaches the designed length.
Further, in the construction method for dewatering in the pile, the diameter of the dug pile is 1 meter, and the length of the dug pile is 10 meters.
Furthermore, in the method for the construction of the internal dewatering of the pile, the inclined shaft and the axial direction of the bored pile form an angle of 33 degrees.
Because when carrying out first transverse passage and second transverse passage excavation, owing to still having constructed the inclined shaft to draw water through setting up the suction pump, can effectively reduce the infiltration problem of groundwater, owing to the layering excavation is strengthened with the successive layer, can avoid the land to subside well, simultaneously because the layering excavation can reduce the occupation of city soil.
Drawings
FIG. 1 is a construction configuration view after completion of construction according to the present invention;
FIG. 2 is a construction configuration view at a first stage according to the present invention;
FIG. 3 is a construction configuration view at a second stage according to the present invention;
FIG. 4 is a construction configuration view at a third stage according to the present invention;
figure 5 is a diagram of a dug pile layout according to the present invention.
Reference numerals:
1: guiding a hole;
11: a first layer of pilot holes;
12: a second layer of pilot holes;
3: digging a hole pile;
31: digging a hole pile at the upper part;
32: digging a hole pile at the lower part;
4: a deviated well;
41: a first deviated well;
42: a second deviated well;
43: a third deviated well;
44: a fourth deviated well;
5: a shaft;
51: a first stage shaft;
52: a second-stage vertical shaft;
6: dewatering wells;
7: a transverse channel;
71: a first transverse channel;
72: a second transverse channel;
73: a third transverse channel;
74: a fourth transverse channel;
8: an earth formation;
81: covering soil on the upper layer;
82: a first aqueous layer;
83: a water barrier layer;
84: a second aqueous layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
For convenience of illustration, the formation 8 includes, from top to bottom, an upper casing 81, a first aquifer 82, a water barrier 83, and a second aquifer 84.
The embodiment of the invention relates to a construction method for dewatering in a pile, which comprises the following steps: construction of a transverse channel: firstly constructing a dewatering well 6, completing construction of a vertical well 5 after finishing the dewatering well 6, then completing construction of at least two first transverse channels 71, constructing the vertical well 5 to the depth of the first transverse channels 71, then constructing at least two second transverse channels 72 positioned below the first transverse channels 71, and then constructing a first layer pilot tunnel 11 for communicating two adjacent first transverse channels; the construction step of the hole digging pile: then constructing a bored pile 3 downward in the first-layer pilot tunnel 11, and temporarily closing the bored pile 3 while passing through a first aquifer 82 of soil; construction of an inclined shaft: then constructing an inclined shaft 4 at the bottom of the hole digging pile 3 along the direction of the transverse channel, and simultaneously arranging a water suction pump in the inclined shaft 4 to lower the underground water level below a second aquifer 84; repeating the transverse channel construction step, and continuously constructing a third transverse channel 73 and a second-layer pilot tunnel 12 below the second transverse channel 72; and repeating the construction step of the hole digging pile, and constructing the hole digging pile downwards in the second-layer pilot tunnel 12 until the construction reaches the designed length. In this embodiment, the excavation of the fourth transverse channel 74 is continued, and then the second layer of guide tunnels 12 is excavated in the layer of the fourth transverse channel 74.
In the specific construction process, when the bored pile 3 is constructed, the upper bored pile 31 can be constructed to the water level line first, and after the part is completed, the lower bored pile 32 can be constructed as required, and simultaneously, when the inclined shaft 4 is constructed, two inclined shafts 4 can be constructed in each inclined shaft 4, namely, the first inclined shaft 41 and the second inclined shaft 42, and the third inclined shaft 43 and the fourth inclined shaft 44 can be constructed in other inclined shafts, wherein, when the inclined shaft 4 is constructed, the first inclined shaft 41 can be 33 degrees in the axial direction of the bored pile 3, and the length is 3.771 meters, and the second inclined shaft 42 is 41 degrees in the axial direction of the bored pile 3, and the length is 4.169 meters. And the other inclined shaft 4, namely a third inclined shaft 43 and a fourth inclined shaft 44 constructed at the second inclined shaft 42, wherein the third inclined shaft 43 and the fourth inclined shaft 44 form an angle of 34 degrees with the axial direction of the dug pile 3 and the length of 3.827 meters.
When the bored piles 3 are specifically excavated, construction may be performed according to the following steps, referring to fig. 5, if the interval between adjacent bored piles 3 is d, after the construction of a first bored pile, a second bored pile 3 is constructed at an interval of 5d, and then construction is performed at an interval of 5d, after the construction is completed, one bored pile 3 is constructed beside the first bored pile 3 at an interval of d, and then construction is performed at an interval of 5d, and thus construction is repeated,
the method greatly shortens the precipitation distance, can obtain better precipitation effect, is closely matched with the construction process, does not influence the excavation process, and is simple and convenient to construct and convenient to implement.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (4)
1. A construction method for dewatering in a pile is characterized by comprising the following steps:
construction of a transverse channel: firstly constructing a dewatering well, completing construction of a vertical well after the dewatering well is completed, then completing construction of at least two first transverse channels, constructing the vertical well to the depth of the first transverse channels, then constructing at least two second transverse channels positioned below the first transverse channels, and then constructing a first layer of pilot tunnel for communicating two adjacent first transverse channels;
the construction step of the hole digging pile: constructing a hole digging pile downwards in the first layer of pilot tunnel, and temporarily sealing the hole digging pile when the hole digging pile penetrates through a first aquifer of soil;
construction of an inclined shaft: then constructing an inclined shaft at the bottom of the hole digging pile along the direction of the transverse channel, and simultaneously arranging a water suction pump in the inclined shaft to lower the underground water level to be below a soil aquifer;
repeating the step of constructing the transverse passage, and continuously constructing a third transverse passage and a second layer of pilot tunnel below the second transverse passage;
and repeating the construction step of the hole digging pile, and constructing the hole digging pile downwards in the second layer of pilot tunnel until the construction reaches the designed length.
2. The method for construction of precipitation in piles according to claim 1, characterized in that:
the diameter of the dug pile is 1 meter, and the length of the dug pile is 10 meters.
3. The method for construction of precipitation in piles according to claim 1, characterized in that:
and constructing two inclined shafts per drilled pile, wherein one inclined shaft is 33 degrees to the axial direction of the drilled pile and is 3.771 meters in length, and the other inclined shaft is 41 degrees to the axial direction of the drilled pile and is 4.169 meters in length.
4. The method for construction of precipitation in piles according to claim 1, characterized in that:
and constructing two inclined shafts for each drilling pile, wherein the angle between the two inclined shafts and the axial direction of the digging pile is 34 degrees, and the length of the inclined shafts is 3.827 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911276678.1A CN111022118A (en) | 2019-12-12 | 2019-12-12 | Construction method for dewatering in pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911276678.1A CN111022118A (en) | 2019-12-12 | 2019-12-12 | Construction method for dewatering in pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111022118A true CN111022118A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911276678.1A Pending CN111022118A (en) | 2019-12-12 | 2019-12-12 | Construction method for dewatering in pile |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011148285A2 (en) * | 2010-05-26 | 2011-12-01 | Schlumberger Canada Limited | Mine dewatering system and method |
| CN204212167U (en) * | 2014-09-17 | 2015-03-18 | 北京市轨道交通建设管理有限公司 | Lowering level of ground water structure |
| CN107964971A (en) * | 2017-11-23 | 2018-04-27 | 北京地矿工程建设有限责任公司 | A kind of precipitation method of subway station using the construction of PBA engineering methods |
| CN108797620A (en) * | 2018-05-25 | 2018-11-13 | 北京地矿工程建设有限责任公司 | A kind of OPT construction method of interlocking pile |
| CN109537608A (en) * | 2018-11-26 | 2019-03-29 | 五冶集团上海有限公司 | A kind of method of precipitation in artificial digging pile stake |
| CN110374124A (en) * | 2019-06-20 | 2019-10-25 | 北京市地质工程勘察院 | Subway work drainage system |
-
2019
- 2019-12-12 CN CN201911276678.1A patent/CN111022118A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011148285A2 (en) * | 2010-05-26 | 2011-12-01 | Schlumberger Canada Limited | Mine dewatering system and method |
| CN204212167U (en) * | 2014-09-17 | 2015-03-18 | 北京市轨道交通建设管理有限公司 | Lowering level of ground water structure |
| CN107964971A (en) * | 2017-11-23 | 2018-04-27 | 北京地矿工程建设有限责任公司 | A kind of precipitation method of subway station using the construction of PBA engineering methods |
| CN108797620A (en) * | 2018-05-25 | 2018-11-13 | 北京地矿工程建设有限责任公司 | A kind of OPT construction method of interlocking pile |
| CN109537608A (en) * | 2018-11-26 | 2019-03-29 | 五冶集团上海有限公司 | A kind of method of precipitation in artificial digging pile stake |
| CN110374124A (en) * | 2019-06-20 | 2019-10-25 | 北京市地质工程勘察院 | Subway work drainage system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |
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| RJ01 | Rejection of invention patent application after publication |