CN217538726U - Structure is laid to subway shield tunnel slip casting lifting system's slip casting pipe - Google Patents
Structure is laid to subway shield tunnel slip casting lifting system's slip casting pipe Download PDFInfo
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- CN217538726U CN217538726U CN202221202920.8U CN202221202920U CN217538726U CN 217538726 U CN217538726 U CN 217538726U CN 202221202920 U CN202221202920 U CN 202221202920U CN 217538726 U CN217538726 U CN 217538726U
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- grouting
- pipe
- slip casting
- shield tunnel
- pipes
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Abstract
The utility model discloses a structure for arranging grouting pipes of a subway shield tunnel grouting lifting system, which comprises grouting pipes arranged at the bottoms of all pipe piece rings of a section to be lifted, wherein each grouting pipe comprises two grouting branch pipes pointing to two sides of the bottom of each pipe piece ring, and the grouting branch pipes are radially arranged and form an included angle of 45 degrees with the vertical direction; and the grouting pipes on the pipe sheet rings of every 3-5 rings are connected in parallel on a main grouting pipe, and the main grouting pipe is grouted by a grouting pump. The utility model has the advantages that: can make shield tunnel slip casting lifting in-process tunnel vertical atress more add evenly to avoid the slip casting process to lead to section of jurisdiction fracture, damage, prevent that lifting process shield tunnel from taking place too big horizontal elliptical deformation, and can show improvement tunnel slip casting lifting effect.
Description
Technical Field
The utility model relates to a shield tunnel technical field, concretely relates to subway shield tunnel slip casting lifting system's slip casting pipe lays structure.
Background
The shield tunnel formed by splicing the segments is an important structure of a subway interval line and has the characteristic of small longitudinal and transverse rigidity. With the continuous development of urban construction, shield tunnels are inevitably affected by peripheral engineering, such as earth surface loading, foundation pit excavation, underpass engineering and the like, and the longitudinal uneven settlement of the shield tunnels is easily induced by the engineering activities. In addition, the shield tunnel may also experience longitudinal differential settlement due to improper shield construction and vehicle-induced vibration during operation.
Aiming at longitudinal uneven settlement of the shield tunnel, grouting from the bottom of the tunnel is generally adopted at present to achieve the lifting effect. However, the existing method adopts a small number of times of grouting at single points, and the total additional load generated to the shield tunnel during single-point grouting is limited, so that the lifting amount of the tunnel is very limited, and the ideal effect is extremely difficult to achieve. In addition, when single-point grouting is adopted, the additional load of the tunnel is concentrated due to grouting, and secondary diseases such as cracking, damage, duct piece dislocation and the like easily occur to the tunnel.
Disclosure of Invention
The utility model aims at providing a subway shield tunnel slip casting lifting system's slip casting pipe lays structure according to the weak point of above-mentioned prior art, this slip casting pipe lays the structure and encircles the bottom through each section of jurisdiction at required lifting district section and arrange the slip casting pipe to two slip casting branch pipes that make the slip casting pipe incline directional section of jurisdiction ring bottom both sides and to the outside soil body extension of section of jurisdiction ring, so that shield tunnel slip casting lifting in-process tunnel vertical atress more adds evenly.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
a grouting pipe arrangement structure of a subway shield tunnel grouting lifting system is characterized by comprising grouting pipes arranged at the bottoms of pipe piece rings of a section to be lifted, wherein each grouting pipe comprises two grouting branch pipes pointing to two sides of the bottom of each pipe piece ring, and the grouting branch pipes are radially arranged and form an included angle of 45 degrees with the vertical direction; and the grouting pipes on the pipe sheet rings of each 3-5 rings are connected in parallel to a main grouting pipe, and the main grouting pipe is used for grouting by a grouting pump.
And a pressure gauge and a ball valve are arranged on the grouting branch pipe.
And the grout outlet of the grouting branch pipe penetrates through the bottom wall surface of the segment ring and extends into the soil body outside the segment ring, and the distance between the grout outlet of the grouting branch pipe and the outer wall surface of the segment ring is 1/3D-1/2D, wherein D represents the outer diameter of the segment ring.
The utility model has the advantages that: can make shield tunnel slip casting lifting in-process tunnel vertical atress more add evenly to avoid the slip casting process to lead to section of jurisdiction fracture, damage, prevent that lifting process shield tunnel from taking place too big oval deformation that violently, and can show improvement tunnel slip casting lifting effect.
Drawings
FIG. 1 is a transverse end view of a grouting arrangement structure of the present invention;
fig. 2 is a side view of the structure is laid to the well slip casting of the utility model.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
referring to fig. 1-2, the symbols in the figure are: the device comprises a shield tunnel 1, a grouting pipe 2, a grouting branch pipe 2a, a ball valve 3, a pressure gauge 4, a main grouting pipe 5 and a segment ring 6.
Example (b): as shown in fig. 1 and 2, the present embodiment specifically relates to a grouting pipe arrangement structure of a subway shield tunnel grouting lifting system, where the grouting pipe arrangement structure is arranged in a required lifting section in a shield tunnel 1, and mainly includes grouting pipes 2, a main grouting pipe 5 and a grouting pump, each group of grouting pipes 2 is respectively and correspondingly arranged on each segment ring 6 in the required lifting section, the grouting pipes 2 on adjacent segment rings 6 are connected in parallel and with the main grouting pipe 5, the main grouting pipe 5 is pumped by the grouting pump, in the present embodiment, the grouting pipes 2 on the segment rings 6 of every 3-5 rings are connected in parallel, the number of the grouting pipes 2 is determined according to actual engineering requirements, and the longitudinal distance between the grouting pipes 2 keeps a certain distance.
As shown in fig. 1 and 2, the grouting pipe 2 on each segment ring 6 is formed by combining two grouting branch pipes 2a, the two grouting branch pipes 2a are radially arranged and respectively point to two sides of the bottom of the segment ring 6, the grout outlet of the grouting branch pipe 2a penetrates through the wall surface of the segment ring 6 and extends into the soil body on the outer side of the segment ring 6, specifically, the distance between the grout outlet of the grouting branch pipe 2a and the outer wall surface of the segment ring 6 is 1/3D-1/2D, where D represents the outer diameter of the segment ring 6, that is, the outer diameter of the shield tunnel 1. In addition, in order to control the opening and closing of the grouting branch pipe 2a and the grouting pressure, a ball valve 3 and a pressure gauge 4 are installed at a portion of the grouting branch pipe 2a located inside the pipe piece ring 2 a.
As shown in fig. 1 and 2, in the grouting pipe arrangement structure in this embodiment, when a subway shield tunnel 1 is grouted and lifted, all grouting pumps in a section to be lifted of the shield tunnel 1 are simultaneously started, grout is conveyed to the grouting pipes 2 on the segment rings 6 through a main grouting pipe 5 to be grouted and lifted, and results are monitored in real time through a pressure gauge 4 in combination with a field to control grouting pressure of each grouting pump. It should be noted that the position of the grouting branch pipe 2a and the corresponding grouting amount are specifically arranged according to different positions and settlement amounts of uneven settlement of each segment ring 6 in the shield tunnel 1, so as to achieve a better grouting effect.
The beneficial effect of this embodiment does: can make shield tunnel slip casting lifting in-process tunnel vertical atress more add evenly to avoid the slip casting process to lead to section of jurisdiction fracture, damage, prevent that lifting process shield tunnel from taking place too big horizontal elliptical deformation, and can show improvement tunnel slip casting lifting effect.
Claims (3)
1. A grouting pipe arrangement structure of a subway shield tunnel grouting lifting system is characterized by comprising grouting pipes arranged at the bottoms of pipe piece rings of a section to be lifted, wherein each grouting pipe comprises two grouting branch pipes pointing to two sides of the bottom of each pipe piece ring, and the grouting branch pipes are radially arranged and form an included angle of 45 degrees with the vertical direction; and the grouting pipes on the pipe sheet rings of each 3-5 rings are connected in parallel to a main grouting pipe, and the main grouting pipe is used for grouting by a grouting pump.
2. The grouting pipe layout structure of a subway shield tunnel grouting lifting system as claimed in claim 1, wherein said grouting branch pipe is provided with a pressure gauge and a ball valve.
3. The structure of claim 2, wherein the grout outlet of the grouting branch pipe penetrates through the bottom wall surface of the segment ring and extends into the soil body outside the segment ring, and the distance from the grout outlet of the grouting branch pipe to the outer wall surface of the segment ring is between 1/3D and 1/2D, wherein D represents the outer diameter of the segment ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221202920.8U CN217538726U (en) | 2022-05-19 | 2022-05-19 | Structure is laid to subway shield tunnel slip casting lifting system's slip casting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221202920.8U CN217538726U (en) | 2022-05-19 | 2022-05-19 | Structure is laid to subway shield tunnel slip casting lifting system's slip casting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217538726U true CN217538726U (en) | 2022-10-04 |
Family
ID=83434655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221202920.8U Active CN217538726U (en) | 2022-05-19 | 2022-05-19 | Structure is laid to subway shield tunnel slip casting lifting system's slip casting pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217538726U (en) |
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2022
- 2022-05-19 CN CN202221202920.8U patent/CN217538726U/en active Active
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