CN109137981B - Temporary underpinning structure of underground engineering permanent structural column and construction method - Google Patents
Temporary underpinning structure of underground engineering permanent structural column and construction method Download PDFInfo
- Publication number
- CN109137981B CN109137981B CN201811179897.3A CN201811179897A CN109137981B CN 109137981 B CN109137981 B CN 109137981B CN 201811179897 A CN201811179897 A CN 201811179897A CN 109137981 B CN109137981 B CN 109137981B
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- plate beam
- structural column
- underpinning
- column
- middle plate
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- 238000009424 underpinning Methods 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 239000002689 soil Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
Abstract
The invention discloses a temporary underpinning structure of a permanent structural column of an underground engineering, and relates to a temporary underpinning structure of a structural column, which comprises a top plate beam, a middle plate beam and a bottom plate beam which are positioned below the ground; the top plate beam, the middle plate beam and the bottom plate beam are connected through wall posts; an upper first structural column and an upper second structural column are arranged between the top plate beam and the middle plate beam, and a underpinning diagonal bracing is arranged between the top plate beam and the middle plate beam; the two underpinning diagonal braces are symmetrical relative to the upper layer first structural column; a lower first structural column is arranged between the middle plate beam and the bottom plate beam, and is positioned at the lower part of the upper second structural column; a structural column to be underpinned is arranged between the middle plate beam and the bottom plate beam and is positioned at the lower part of the upper layer first structural column; and a post-under anti-pulling pile is arranged below the bottom plate beam. The invention has the characteristics of simple operation, convenient implementation and lower cost, and has less influence on the outside. The invention also discloses a construction method of the temporary underpinning structure of the underground engineering permanent structure column.
Description
Technical Field
The invention relates to a temporary underpinning structure of a structural column, in particular to a temporary underpinning structure of a permanent structural column of an underground engineering. The invention also discloses a construction method of the temporary underpinning structure of the underground engineering permanent structure column.
Background
When subway engineering construction, the permanent structural column part cannot be immediately constructed due to certain reasons, but in order to ensure the function of the upper structure, measures are needed to be taken for temporary underpinning, and the underpinning measures are needed to ensure the space requirement of the underpinning part and the stress requirement of the upper structure of the underpinned column. For example, due to ground site reasons (no receiving or starting conditions of shield construction) or construction period reasons, the shield machine needs to translate or turn around in a station, and structural columns between a first span and a second span of a station underground two-layer shield well part need to be applied after the shield translation or turning around is completed so as to ensure the shield translation space. However, in order to ensure the critical construction period, the upper structure, the upper earth covering on the top plate and the like still need to be backfilled according to the original construction period, so that the stress span of the structural girder of the part is doubled, and the top plate girder and the bottom plate girder are difficult to meet the stress requirement. The common practice increases the beam section and reinforcement to improve the bearing capacity of the beam, but some of the beams are deeper in earth covering, the longitudinal beams are stressed more, or the beam section is limited by the height of a building layer, so that the conventional measures cannot meet the requirements, and the shield has to be abandoned for turning or translation, and other methods are adopted for construction, so that more cost and time are spent.
Therefore, research on a temporary underpinning structure of a permanent structural column of an underground engineering and a construction method becomes an urgent and important work.
Disclosure of Invention
A first object of the present invention is to overcome the above-mentioned drawbacks of the prior art, and to provide a temporary underpinning structure for a permanent structural column of an underground engineering.
A second object of the present invention is to provide a construction method of such a temporary underpinning structure for an underground works permanent structural column as described above.
In order to achieve the first object, a temporary underpinning structure for a permanent structural column of an underground engineering is characterized in that: comprises a top plate beam positioned below the ground, a middle plate beam positioned below the top plate beam and a bottom plate beam positioned below the middle plate beam; the left sides of the top plate beam, the middle plate beam and the bottom plate beam are connected through wall posts; an upper first structural column and an upper second structural column are arranged between the top plate beam and the middle plate beam, and the upper first structural column is positioned at the left side of the upper second structural column; a underpinning diagonal bracing is arranged between the top plate beam and the middle plate beam; the two underpinning diagonal braces are symmetrical relative to the upper layer first structural column;
a lower first structural column is arranged between the middle plate beam and the bottom plate beam, and is positioned at the lower part of an upper second structural column; a structural column to be underpinned is arranged between the middle plate beam and the bottom plate beam and is positioned at the lower part of the upper first structural column;
and a post-under anti-pulling pile is arranged below the bottom plate beam.
In the technical scheme, brackets are arranged between the wall posts and the middle plate beam and between the lower first structural posts and the middle plate beam; the two brackets are symmetrical relative to the structural column to be underpinned.
In the above technical scheme, the axes of the upper first structural column, the structural column to be underpinned and the post-under anti-pulling pile are on the same axis.
In the technical scheme, the top plate beam comprises a top beam and a top plate, the middle plate beam comprises a middle beam and a middle plate, and the bottom plate beam comprises a bottom beam and a bottom plate; the underpinning diagonal bracing is arranged between the top plate and the middle plate; the under-column anti-pulling pile is arranged below the bottom beam.
In order to achieve the second object, the technical scheme of the invention is as follows: the construction method of temporary underpinning structure of underground engineering permanent structure column includes the following steps,
step 1: constructing a pile under the column;
step 2: pouring a bottom plate beam, a wall column, a lower first structural column, a bracket, a middle plate beam, an upper first structural column, an upper second structural column and a top plate beam, and reserving pouring conditions of the structural columns needing underpinning;
step 3: pouring, underpinning and replacing the diagonal bracing;
step 4: when the structure reaches the design strength, backfilling the top plate Liang Futu;
step 5: after the shield is translated or turned around, pouring a structural column to be underpinned;
step 6: and when the underpinned structural column reaches the design strength, removing the underpinning diagonal bracing.
Compared with the prior art, the invention has the following beneficial effects:
1) The invention can effectively solve the problem that the permanent column can not be temporarily made by increasing the beam section and reinforcing bars in the prior art by using the underpinning mode.
2) The invention has the characteristics of simple operation, convenient implementation and lower cost, and has less influence on the outside.
3) The invention changes the stress mode, and uses other components to bear the force needed to bear by the original column, thereby effectively solving the problem that the original traditional method can not solve the stress.
Drawings
Fig. 1 is a schematic longitudinal section of the structure of the present invention.
Fig. 2 is a schematic cross-sectional view of the structure of the present invention.
In the figure, 1-roof beams, 1 a-roof beams, 1 b-roof, 2-middle beams, 2 a-middle beams, 2 b-middle plates, 3-bottom beams, 3 a-bottom beams, 3 b-bottom plates, 4-wall columns, 5a 1-upper first structural columns, the device comprises a 5a 2-upper layer second structural column, a 5b 1-lower layer first structural column, a 6-underpinning diagonal bracing, a 7-structural column needing underpinning, an 8-column lower anti-pulling pile and a 9-bracket.
Detailed description of the preferred embodiments
The following detailed description of the invention is, therefore, not to be taken in a limiting sense, but is made merely by way of example. While the advantages of the invention will become apparent and readily appreciated by reference to the following description.
As can be seen with reference to the accompanying drawings: temporary underpinning structure of underground engineering permanent structure post, its characterized in that: comprises a top plate beam 1 positioned below the ground 10, a middle plate beam 2 positioned below the top plate beam 1 and a bottom plate beam 3 positioned below the middle plate beam 2; the left sides of the top plate beam 1, the middle plate beam 2 and the bottom plate beam 3 are connected through wall posts 4; an upper first structural column 5a1 and an upper second structural column 5a2 are arranged between the top plate beam 1 and the middle plate beam 2, and the upper first structural column 5a1 is positioned at the left side of the upper second structural column 5a 2; a underpinning diagonal brace 6 is arranged between the top plate beam 1 and the middle plate beam 2; the two underpinning diagonal braces 6 are symmetrical relative to the upper first structural column 5a 1;
a lower first structural column 5b1 is arranged between the middle plate beam 2 and the bottom plate beam 3, and the lower first structural column 5b1 is positioned at the lower part of the upper second structural column 5a 2; a structural column 7 needing underpinning is arranged between the middle plate beam 2 and the bottom plate beam 3, and the structural column 7 needing underpinning is positioned at the lower part of the upper layer first structural column 5a 1;
a post-lower anti-pulling pile 8 is arranged below the bottom plate beam 3; the bottom plate beam 3 solves the problem of the stress of the bottom plate beam 3 by arranging one or more post-lower anti-pulling piles 8 below the bottom plate beam 3 a; when the station is originally designed with the post-pulling resistant pile 8, the position of the post-pulling resistant pile 8 can be adjusted for use. The axial force N of the structural column 7 to be underpinned is calculated by using an original structural model (without underpinning), after the structural column 7 to be underpinned is withdrawn by using a load equivalent principle, the under-column anti-pulling pile 8 is added on the side of the structural column 7 to be underpinned, the anti-pulling force F=N of the under-column anti-pulling pile 8 is calculated, and then the size of the under-column anti-pulling pile 8 is calculated according to soil layer characteristics.
Brackets 9 are arranged between the wall posts 4 and the middle plate beam 2 and between the lower first structural posts 5b1 and the middle plate beam 2; the two brackets 9 are symmetrical relative to the structural column 7 to be underpinned.
The axes of the upper first structural column 5a1, the structural column 7 needing underpinning and the post-lower anti-pulling pile 8 are on the same axis.
The top plate beam 1 comprises a top beam 1a and a top plate 1b, the middle plate beam 2 comprises a middle beam 2a and a middle plate 2b, and the bottom plate beam 3 comprises a bottom beam 3a and a bottom plate 3b; the underpinning diagonal bracing 6 is arranged between the top plate 1b and the middle plate 2 b; the under-column uplift pile 8 is arranged below the bottom beam 3 a. The underpinning diagonal bracing 6 is added between the top plate 1b and the middle plate 2b, so that a stress system of the top plate beam 1 and the middle plate beam 2 can be converted into a truss stress system, and the stress problem of the top plate beam 1 and the middle plate beam 2 is solved; the size of the underpinning diagonal bracing 6 is obtained through software modeling calculation such as PKPM, SAP and the like.
The construction method of the temporary underpinning structure of the underground engineering permanent structural column is characterized by comprising the following steps of: comprises the steps of,
step 1: constructing a pile under the column 8;
step 2: pouring a bottom plate beam 3, a wall column 4, a lower layer first structural column 5b1, a bracket 9, a middle plate beam 2, an upper layer first structural column 5a1, an upper layer second structural column 5a2 and a top plate beam 1, and reserving pouring conditions of the structural column 7 needing underpinning;
step 3: pouring a underpinning diagonal brace 6;
step 4: when the structure reaches the design strength, backfilling the top plate beam 1 to cover soil;
step 5: after the shield is translated or the shield turns around, pouring a structural column 7 needing underpinning;
step 6: when the underpinned structural columns 7 reach the design strength, the underpinning diagonal braces 6 are removed.
In actual use, the invention solves the stress problem of the bottom plate beam 3 by arranging at least one under-column anti-pulling pile 8 below the bottom plate beam 3, and when the under-column anti-pulling pile 8 is originally designed in the station, the position of the under-column anti-pulling pile 8 can be adjusted for utilization.
It should be noted that, in the upper first structural column 5a1 and the upper second structural column 5a2, there may be aN upper third structural column 5a3 and aN upper fourth structural column 5a4 …, and aN upper nth structural column 5aN according to the requirements of engineering construction; the lower layer first structural column 5b1 may also have a lower layer second structural column 5b2, a lower layer third structural column 5b3 … and a lower layer Nth structural column 5bN according to engineering construction requirements.
Other parts not described in detail are known in the art.
Claims (5)
1. Temporary underpinning structure of underground engineering permanent structure post, its characterized in that: comprises a top plate beam (1) positioned below the ground (10), a middle plate beam (2) positioned below the top plate beam (1) and a bottom plate beam (3) positioned below the middle plate beam (2); the left sides of the top plate beam (1), the middle plate beam (2) and the bottom plate beam (3) are connected through wall posts (4); an upper first structural column (5 a 1) and an upper second structural column (5 a 2) are arranged between the top plate beam (1) and the middle plate beam (2), and the upper first structural column (5 a 1) is positioned at the left side of the upper second structural column (5 a 2); a underpinning diagonal brace (6) is arranged between the top plate beam (1) and the middle plate beam (2); the two underpinning diagonal braces (6) are symmetrical relative to the upper first structural column (5 a 1);
a lower first structural column (5 b 1) is arranged between the middle plate beam (2) and the bottom plate beam (3), and the lower first structural column (5 b 1) is positioned at the lower part of the upper second structural column (5 a 2); a structural column (7) needing underpinning is arranged between the middle plate beam (2) and the bottom plate beam (3), and the structural column (7) needing underpinning is positioned at the lower part of the upper layer first structural column (5 a 1);
and a post-lower anti-pulling pile (8) is arranged below the bottom plate beam (3).
2. The underground works permanent structure column temporary underpinning structure of claim 1, wherein: brackets (9) are arranged between the wall posts (4) and the middle plate beam (2) and between the lower first structural posts (5 b 1) and the middle plate beam (2); the two brackets (9) are symmetrical relative to the structural column (7) to be underpinned.
3. The underground works permanent structure column temporary underpinning structure of claim 1 or 2, wherein: the axes of the upper first structural column (5 a 1), the structural column (7) needing underpinning and the post-lower anti-pulling pile (8) are on the same axis.
4. A temporary underpinning structure for an underground works permanent structure column of claim 3, wherein: the top plate beam (1) comprises a top beam (1 a) and a top plate (1 b), the middle plate beam (2) comprises a middle beam (2 a) and a middle plate (2 b), and the bottom plate beam (3) comprises a bottom beam (3 a) and a bottom plate (3 b); the underpinning diagonal bracing (6) is arranged between the top plate (1 b) and the middle plate (2 b); the under-column anti-pulling pile (8) is arranged below the bottom beam (3 a).
5. The construction method of the temporary underpinning structure of the underground engineering permanent structural column is characterized by comprising the following steps of: comprises the steps of,
step 1: constructing a pile under the column (8);
step 2: pouring a bottom plate beam (3), wall columns (4), a lower layer first structural column (5 b 1), corbels (9), a middle plate beam (2), an upper layer first structural column (5 a 1), an upper layer second structural column (5 a 2) and a top plate beam (1), and reserving pouring conditions of a structural column (7) needing underpinning;
step 3: pouring a underpinning diagonal brace (6);
step 4: when the structure reaches the design strength, backfilling the top plate beam (1) to cover soil;
step 5: after the shield is translated or turned around, pouring a structural column (7) to be underpinned;
step 6: and when the underpinned structural column (7) reaches the design strength, the underpinning diagonal bracing (6) is removed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811179897.3A CN109137981B (en) | 2018-10-10 | 2018-10-10 | Temporary underpinning structure of underground engineering permanent structural column and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811179897.3A CN109137981B (en) | 2018-10-10 | 2018-10-10 | Temporary underpinning structure of underground engineering permanent structural column and construction method |
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| CN109137981A CN109137981A (en) | 2019-01-04 |
| CN109137981B true CN109137981B (en) | 2023-12-01 |
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| CN109899087A (en) * | 2019-01-21 | 2019-06-18 | 成都市建筑设计研究院 | A kind of hole column tunneling is inverse to build underground structure and construction method |
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| JP2011127367A (en) * | 2009-12-18 | 2011-06-30 | Takenaka Komuten Co Ltd | Method for forming building |
| CN106168053A (en) * | 2016-08-19 | 2016-11-30 | 中铁隧道勘测设计院有限公司 | Y shape pillar is used to be combined the structure at design large span deep buried metro station with uplift pile |
| CN206091360U (en) * | 2016-10-10 | 2017-04-12 | 上海岩土工程勘察设计研究院有限公司 | Shaped steel bracing basis underpins structure |
| CN106639346A (en) * | 2016-10-10 | 2017-05-10 | 上海岩土工程勘察设计研究院有限公司 | Construction method for existing building downward storey-adding by using inclined strut underpinning structure |
| CN108468345A (en) * | 2018-04-08 | 2018-08-31 | 中铁第四勘察设计院集团有限公司 | It is a kind of to exempt to set the structure of floor beams and construction method for subway underground station end well |
| CN209468781U (en) * | 2018-10-10 | 2019-10-08 | 长江勘测规划设计研究有限责任公司 | The interim underpinning structure of underground engineering permanent structure column |
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2018
- 2018-10-10 CN CN201811179897.3A patent/CN109137981B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011127367A (en) * | 2009-12-18 | 2011-06-30 | Takenaka Komuten Co Ltd | Method for forming building |
| CN106168053A (en) * | 2016-08-19 | 2016-11-30 | 中铁隧道勘测设计院有限公司 | Y shape pillar is used to be combined the structure at design large span deep buried metro station with uplift pile |
| CN206091360U (en) * | 2016-10-10 | 2017-04-12 | 上海岩土工程勘察设计研究院有限公司 | Shaped steel bracing basis underpins structure |
| CN106639346A (en) * | 2016-10-10 | 2017-05-10 | 上海岩土工程勘察设计研究院有限公司 | Construction method for existing building downward storey-adding by using inclined strut underpinning structure |
| CN108468345A (en) * | 2018-04-08 | 2018-08-31 | 中铁第四勘察设计院集团有限公司 | It is a kind of to exempt to set the structure of floor beams and construction method for subway underground station end well |
| CN209468781U (en) * | 2018-10-10 | 2019-10-08 | 长江勘测规划设计研究有限责任公司 | The interim underpinning structure of underground engineering permanent structure column |
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| CN109137981A (en) | 2019-01-04 |
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