CN114233336B - Tree-shaped steel pipe pile for supporting arch springing of soft foundation arch frame in tunnel and construction process of tree-shaped steel pipe pile - Google Patents
Tree-shaped steel pipe pile for supporting arch springing of soft foundation arch frame in tunnel and construction process of tree-shaped steel pipe pile Download PDFInfo
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- CN114233336B CN114233336B CN202111294935.1A CN202111294935A CN114233336B CN 114233336 B CN114233336 B CN 114233336B CN 202111294935 A CN202111294935 A CN 202111294935A CN 114233336 B CN114233336 B CN 114233336B
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- steel pipe
- supporting
- tree
- cement mortar
- shaped steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 137
- 239000010959 steel Substances 0.000 title claims abstract description 137
- 230000008093 supporting effect Effects 0.000 title claims abstract description 68
- 238000010276 construction Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 7
- 239000011083 cement mortar Substances 0.000 claims description 35
- 238000007599 discharging Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/183—Supporting means for arch members, not provided for in E21D11/22
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/12—Temporary supports for use during building; Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the field of steel pipe piles, and discloses a tree-shaped steel pipe pile for supporting arch legs of a soft foundation section arch in a tunnel, which comprises at least one first steel pipe, wherein second steel pipes are arranged on the first steel pipes, the second steel pipes are connected with the first steel pipes through screw thread matching, and one end of each first steel pipe deviating from the second steel pipe is closed; the top end of the second steel pipe is provided with a first supporting part, the first supporting part is positioned at the lower end of the second supporting part, and the first supporting part is fixedly connected with the second supporting part; the second supporting part is attached to the top end of the supported tunnel; the upper end part of the second steel pipe is provided with a discharge hole communicated with the cavity of the second steel pipe, and the lower end part of the first steel pipe is provided with a feed hole communicated with the cavity of the second steel pipe; support the tunnel top, reduce subsidence.
Description
Technical Field
The disclosure belongs to the field of steel pipe piles, and particularly relates to a tree-shaped steel pipe pile for supporting arch feet of a soft foundation section arch in a tunnel and a construction process thereof.
Background
Tunnel engineering is built in a weak stratum, and due to insufficient bearing capacity of a foundation, instability and deformation of the tunnel are caused, the settlement amount is large, the tunnel construction and operation safety are seriously affected, and particularly for a high-speed railway, the settlement control is very strict, and the settlement after construction is required to be not more than 5mm.
Disclosure of Invention
Aiming at the defects of the prior art, the purpose of the disclosure is to provide a tree-shaped steel pipe pile for supporting the arch springing of a soft foundation arch in a tunnel and a construction process thereof, which are used for supporting the top end of the tunnel and reducing sedimentation.
The purpose of the disclosure can be achieved by the following technical scheme:
the tree-shaped steel pipe pile for supporting the arch springing of the soft foundation arch centering in the tunnel comprises at least one first steel pipe, wherein second steel pipes are arranged on the first steel pipes, the second steel pipes are connected with the first steel pipes through screw thread matching, and one end of each first steel pipe deviating from the second steel pipe is closed;
the top end of the second steel pipe is provided with a first supporting part, the first supporting part is positioned at the lower end of the second supporting part, and the first supporting part is fixedly connected with the second supporting part;
the second supporting part is attached to the top end of the supported tunnel;
the upper end part of the second steel pipe is provided with a discharge hole communicated with the cavity of the second steel pipe, and the lower end part of the first steel pipe is provided with a feed hole communicated with the cavity of the second steel pipe.
Further, the first supporting part comprises a disassembling part and a supporting block arranged at the top end of the disassembling part, the supporting block is fixedly connected with the second supporting part, and the disassembling part is detachably connected with the top end of the second steel pipe.
Further, the inner soft foundation section is provided with a fixed area, clamping plates which are in mirror image distribution and mutually spliced are arranged in the fixed area, and the clamping plates are in a wrapping shape on the lower end part of the first steel pipe;
the fixed area between the two clamping plates is filled with cement mortar.
Further, the bottom end of the first steel pipe is suspended on the fixed area.
Further, a plurality of overflow holes are formed in the clamping plate.
Further, the supporting component comprises a supporting plate arranged on the first steel pipe, the lower end of the supporting plate is provided with a joint part which is jointed, the joint part is provided with two joint parts, the two joint parts are in a mirror image mutually spliced state, the lower end of the joint part is provided with a mutually-jointed supporting column, the supporting column is in threaded fit connection in a supporting sleeve, the supporting sleeve consists of two mutually-spliced half supporting sleeves, and the two half supporting sleeves are respectively fixedly installed at the upper end of the clamping plate.
Further, a connecting rod is arranged between the lower end of the lap joint part and the upper end of the clamping plate, and two ends of the connecting rod are hinged with the lower end of the joint part and the upper end of the clamping plate respectively.
Further, the construction process of the tree-shaped steel pipe pile comprises the following steps:
excavating a fixed area for the inner soft foundation section, so that the bottom end part of the first steel pipe is in a suspended state on the fixed area to support the top end of the tunnel;
injecting cement mortar into the feeding hole, so that the cement mortar enters the cavity of the first steel pipe from the bottom end of the first steel pipe until the cement mortar enters the second steel pipe, and discharging the cement mortar from the discharging hole after the second steel pipe is filled;
injecting cement mortar into the inner sides of the clamping plates until a fixed area between the two clamping plates is filled;
when the cement mortar is completely solidified, the support column is rotated, the top end of the support column is downwards far away from the lap joint part, and the lap joint part is pressed down, so that the clamping plate falls off from the solidified cement mortar.
The beneficial effects of the present disclosure are:
the first steel pipe is used as a bottom support body to support the top end of the tunnel; because the integral length of the first steel pipe and the second steel pipe is adjustable, when the top end of the tunnel is supported, the integral length of the first steel pipe and the second steel pipe can be adjusted according to actual conditions; the cement mortar injection for the first steel pipe and the second steel pipe can improve the supporting effect of the first steel pipe and the second steel pipe, and meanwhile, the connection stability between the first steel pipe and the second steel pipe is enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described, and it will be apparent to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic illustration of supporting a tunnel tip in accordance with an embodiment of the present disclosure;
FIG. 2 is a schematic overall structure of an embodiment of the present disclosure;
FIG. 3 is a partial cross-sectional view of an embodiment of the present disclosure;
FIG. 4 is a partial schematic structural view of an embodiment of the present disclosure;
FIG. 5 is a schematic view of a support tube with branch support posts according to an embodiment of the present disclosure;
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments in this disclosure without inventive faculty, are intended to fall within the scope of this disclosure.
1-4, a tree-shaped steel pipe pile for supporting arch legs of a soft foundation arch in a tunnel comprises at least one first steel pipe 11, wherein second steel pipes 12 are arranged on the first steel pipes 11, the second steel pipes 12 are connected with the first steel pipes 11 through screw thread matching, and one ends of the first steel pipes 11 deviating from the second steel pipes 12 are closed;
the top end of the second steel pipe 12 is provided with a first supporting part 13, the first supporting part 13 is positioned at the lower end of a second supporting part 14, and the first supporting part 13 is fixedly connected with the second supporting part 14;
the second supporting part 14 is attached to the supported tunnel top 100 and is used for supporting the tunnel top 100;
the upper end part of the second steel pipe 12 is provided with a discharge port 120 communicated with the cavity of the second steel pipe, and the lower end part of the first steel pipe 11 is provided with a feed port 110 communicated with the cavity of the second steel pipe;
the inlet 110 is filled with cement mortar so that cement mortar enters the cavity of the first steel pipe 11 from the bottom end of the first steel pipe 11 until the cement mortar enters the second steel pipe 12, and when the second steel pipe 12 is filled, the cement mortar is discharged from the discharge port 120.
In the present embodiment, the first steel pipe 11 serves as a bottom support for supporting the tunnel top 100; since the overall lengths of the first steel pipe 11 and the second steel pipe 12 are adjustable, when the tunnel top 100 is supported, the overall lengths of the first steel pipe 11 and the second steel pipe 12 can be adjusted according to actual conditions; as shown in the figure, 5 first steel pipes 11 are provided, and a plurality of first steel pipes 11 support the reinforced tunnel top 100; the cement mortar injection to the first steel pipe 11 and the second steel pipe 12 can enhance the supporting effect of the first steel pipe 11 and the second steel pipe 12 and enhance the connection stability between the first steel pipe 11 and the second steel pipe 12.
The first supporting part 13 comprises a dismounting part 131 and a supporting block 132 arranged at the top end of the dismounting part 131, the supporting block 132 is fixedly connected with the second supporting part 14, and the dismounting part 131 is detachably connected with the top end of the second steel pipe 12, such as in a threaded connection mode, a clamping mode and the like; in use, the first steel pipe 11, the second steel pipe 12 and the first supporting portion 13 are detachably mounted by the detachable portion 131 of the first supporting portion 13 and the second steel pipe 12, so that the first steel pipe 11, the second steel pipe 12 and the first supporting portion 13 can be easily supported and mounted, and finally assembled with each other.
Designing a relevant stability support of the inner soft foundation section, in this embodiment, if a fixed area is excavated for the inner soft foundation section, clamping plates 2 which are distributed in a mirror image manner and are spliced with each other are arranged in the fixed area, and the clamping plates 2 wrap the lower end part of the first steel pipe 11;
when the steel pipe clamping device is used, cement mortar is injected into the inner side of the clamping plates 2 until a fixed area between the two clamping plates 2 is filled, so that the lower end part of the first steel pipe 11 is supported and fixed.
Of course, in some cases, a certain gap is kept between the bottom end of the first steel pipe 11 and the bottom end of the fixing area, so that the bottom end of the first steel pipe 11 is in a suspended state on the fixing area, cement mortar is injected into the inner side of the clamping plates 2 until the fixing area between the two clamping plates 2 is filled, and cement mortar is wrapped on the lower end of the first steel pipe 11 for supporting and fixing.
Be provided with a plurality of overflow apertures 20 on the cardboard 2, be convenient for detect the cement mortar filling condition in the fixed region between two cardboard 2.
For the initial stage of supporting (that is, the period when the cement mortar is not fully solidified), the clamping plate 2 is provided with a supporting component, and the supporting component supports the first steel pipe 11, so that the bottom end of the first steel pipe 11 is in a suspended state on a fixed area.
The support assembly comprises a support plate 31 arranged on a first steel pipe 11, the lower end of the support plate 31 is provided with two joint parts 32, the two joint parts 32 are in a mirror image mutually spliced state, the lower end of the joint part 32 is provided with mutually-spliced support columns 33, the support columns 33 are in threaded fit connection in support sleeves, the support sleeves consist of two mutually-spliced half support sleeves 34, and the two half support sleeves 34 are respectively fixedly arranged at the upper end of the clamping plate 2; when the steel pipe is used, the first steel pipe 11 is supported by the support column 33 and the support sleeve through the lap joint part 32, so that the bottom end part of the first steel pipe 11 is in a suspended state on a fixed area.
A connecting rod 4 is arranged between the lower end of the lap joint part 32 and the upper end of the clamping plate 2, and two ends of the connecting rod 4 are respectively hinged with the lower end of the lap joint part and the upper end of the clamping plate 2.
When the cement mortar is completely solidified, the support column 33 is moved out of the support sleeve, or the support column 33 is rotated, so that the top end of the support column 33 is downwards far away from the lap joint part 32, the lap joint part 32 is pressed down, the acting force of the two clamping plates 2 on the clamping plates 2 in the direction of mutually far away is formed through the connecting rod 4, the clamping plates 2 are separated from the solidified cement mortar, and the clamping plates 2 can be reused.
The construction process of the tree-shaped steel pipe pile for supporting the arch springing of the soft foundation arch frame in the tunnel comprises the following steps:
a fixed area is excavated on the inner soft foundation section, so that the bottom end part of the first steel pipe 11 supports the tunnel top 100 in a suspended state on the fixed area;
injecting cement mortar into the feeding port 110 so that the cement mortar enters the cavity of the first steel pipe 11 from the bottom end of the first steel pipe 11 until the cement mortar enters the second steel pipe 12, and discharging the cement mortar from the discharging port 120 after the second steel pipe 12 is filled;
injecting cement mortar into the inner sides of the clamping plates 2 until a fixed area between the two clamping plates 2 is filled;
when the cement mortar is completely solidified, the support column 33 is rotated, the top end of the support column 33 is far away from the lap joint part 32 downwards, the lap joint part 32 is pressed downwards, the acting force of the direction of the mutual separation of the two clamping plates 2 on the clamping plates 2 is formed through the connecting rod 4, and the clamping plates 2 fall off from the solidified cement mortar.
As shown in fig. 5, the support of the second support portion 14 may be performed by providing a support pipe with branch support columns at the lower end of the support pipe, which temporarily supports both sides of the second support portion 14, as well in some embodiments.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features, and advantages of the present disclosure. It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the disclosure, and various changes and modifications may be made without departing from the spirit and scope of the disclosure, which are within the scope of the disclosure as claimed.
Claims (6)
1. The tree-shaped steel pipe pile for supporting the arch springing of the soft foundation arch in the tunnel comprises at least one first steel pipe (11), and is characterized in that second steel pipes (12) are arranged on the first steel pipes (11), the second steel pipes (12) are connected with the first steel pipes (11) in a threaded fit manner, and one ends of the first steel pipes (11) deviating from the second steel pipes (12) are closed;
a first supporting part (13) is arranged on the top end of the second steel pipe (12), the first supporting part (13) is positioned at the lower end of the second supporting part (14), and the first supporting part (13) is fixedly connected with the second supporting part (14);
the second supporting part (14) is attached to the supporting tunnel top end (100);
the upper end part of the second steel pipe (12) is provided with a discharge hole (120) communicated with the cavity of the second steel pipe, and the lower end part of the first steel pipe (11) is provided with a feed hole (110) communicated with the cavity of the second steel pipe;
the support assembly comprises a support plate (31) arranged on a first steel pipe (11), two joint parts (32) are arranged at the lower end of the support plate (31), the two joint parts (32) are in a mirror image mutually spliced state, a mutually-spliced support column (33) is arranged at the lower end of the joint part (32), the support column (33) is connected in a support sleeve in a threaded fit manner, the support sleeve consists of two mutually-spliced half support sleeves (34), and the two half support sleeves (34) are respectively fixedly arranged at the upper end of the clamping plate (2);
a connecting rod (4) is arranged between the lower end of the lap joint part (32) and the upper end of the clamping plate (2), and two ends of the connecting rod (4) are respectively hinged with the lower end of the joint part and the upper end of the clamping plate (2).
2. The tree-shaped steel pipe pile according to claim 1, characterized in that the first supporting part (13) comprises a dismounting part (131) and a supporting block (132) arranged at the top end of the dismounting part (131), the supporting block (132) is fixedly connected with the second supporting part (14), and the dismounting part (131) is detachably connected with the top end of the second steel pipe (12).
3. The tree-shaped steel pipe pile according to claim 2, characterized in that the inner soft foundation section is provided with a fixed area, clamping plates (2) which are distributed in a mirror image mode and are spliced with each other are arranged in the fixed area, and the clamping plates (2) wrap the lower end part of the first steel pipe (11);
and cement mortar is filled in a fixed area between the two clamping plates (2).
4. A tree-shaped steel pipe pile according to claim 3, characterized in that the bottom end of the first steel pipe (11) is suspended in the fixed zone.
5. The tree-shaped steel pipe pile according to claim 4, characterized in that the clamping plate (2) is provided with a plurality of overflow holes (20).
6. The tree-shaped steel pipe pile according to claim 5, wherein the construction process of the tree-shaped steel pipe pile comprises:
excavating a fixed area for the inner soft foundation section, so that the bottom end part of the first steel pipe (11) supports the top end (100) of the tunnel in a suspended state on the fixed area;
injecting cement mortar into the feeding hole (110) from the bottom end of the first steel pipe (11) to the cavity of the first steel pipe (11) until the cement mortar enters the second steel pipe (12), and discharging the cement mortar from the discharging hole (120) after the second steel pipe (12) is filled;
injecting cement mortar into the inner sides of the clamping plates (2) until a fixed area between the two clamping plates (2) is filled; when the cement mortar is completely solidified, the support column (33) is rotated, the top end of the support column (33) is downwards far away from the lap joint part (32), and the lap joint part (32) is pressed down, so that the clamping plate (2) falls off from the solidified cement mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294935.1A CN114233336B (en) | 2021-11-03 | 2021-11-03 | Tree-shaped steel pipe pile for supporting arch springing of soft foundation arch frame in tunnel and construction process of tree-shaped steel pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294935.1A CN114233336B (en) | 2021-11-03 | 2021-11-03 | Tree-shaped steel pipe pile for supporting arch springing of soft foundation arch frame in tunnel and construction process of tree-shaped steel pipe pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114233336A CN114233336A (en) | 2022-03-25 |
| CN114233336B true CN114233336B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111294935.1A Active CN114233336B (en) | 2021-11-03 | 2021-11-03 | Tree-shaped steel pipe pile for supporting arch springing of soft foundation arch frame in tunnel and construction process of tree-shaped steel pipe pile |
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| CN (1) | CN114233336B (en) |
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2021
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| CN114233336A (en) | 2022-03-25 |
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