CN215332882U - Test device for simulating shield tunnel segment assembly and backfill grouting - Google Patents
Test device for simulating shield tunnel segment assembly and backfill grouting Download PDFInfo
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- CN215332882U CN215332882U CN202121656193.8U CN202121656193U CN215332882U CN 215332882 U CN215332882 U CN 215332882U CN 202121656193 U CN202121656193 U CN 202121656193U CN 215332882 U CN215332882 U CN 215332882U
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Abstract
The utility model discloses a test device for simulating shield tunnel segment splicing and grouting after the wall, which comprises: the device comprises a test model box, similar materials, a shield segment grouting hole, a shield upper segment, a grouting pressure gun, a shield lower segment, grouting materials, a shield segment jack and a shield segment plug; the utility model has simple structure, firstly, prefabricating the upper and lower duct pieces of the shield, reserving the grouting holes, the jacks of the upper and lower duct pieces and the plugs, then assembling the duct pieces one by one in the process of simulating shield excavation, and aligning the grouting pressure gun to the grouting holes to ensure that the grouting material fully fills the gaps between the duct pieces and similar materials to simulate the process of actual shield duct piece assembly and post-wall grouting, so that the influence of shield construction on duct piece pressure and ground surface settlement under the action of grouting pressure can be more accurately simulated, data support can be provided for the actual construction working condition, the effect is better, the cost is low, and the utility model is more suitable for wide application.
Description
Technical Field
The utility model relates to the technical field of shield tunnel excavation model tests, in particular to a test device for simulating segment splicing and grouting after a wall of a shield tunnel.
Background
With the development of cities in China, the number of underground projects is increasing day by day, the development of subways greatly slows down the ground traffic pressure, and shield construction also becomes one of the mainstream construction methods for subway construction because the shield construction has the advantages of high speed and high safety. However, in the shield construction process, the tunnel segment wall post-grouting is an important auxiliary construction means after the shield segments are assembled. Therefore, it is of great significance to fully consider the influence of the post-grouting on the shield tunnel construction. The device for simulating the assembling and grouting of the shield segment has the defects of high manufacturing cost and complex structure at present, and the process of assembling the shield segment and the process of grouting after the shield segment is difficult to simulate according to a conventional model test device, so that the design of the test device for simulating the assembling and grouting after the shield segment, which has the advantages of low cost and simple structure, has certain practical significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device which is simple in structure and can effectively simulate the pressure of grouting pressure to a pipe sheet and the ground surface settlement in the excavation process of a shield tunnel so as to overcome the defects of the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a test device for simulating shield tunnel section of jurisdiction is assembled and grouting behind wall, includes experimental mold box, sets up corresponding sealed lid in experimental mold box front and back side middle part position, packs similar material to experimental mold box intussuseption again, sets up the round hole passageway and this round hole both ends position and sealed lid correspond and form the simulation tunnel section in similar material middle part, sets up measuring element corresponding position in experimental mold box, installs the shield section of jurisdiction in proper order in the simulation tunnel section, form the gap between shield section of jurisdiction and the similar material, it has grouting material to pack in the gap.
As a further scheme of the utility model: the shield segment comprises an upper shield segment and a lower shield segment, wherein one end of the upper shield segment and one end of the lower shield segment are provided with shield segment jacks, and the other end of the upper shield segment and the lower shield segment are provided with shield segment plugs, so that the corresponding upper shield segment and the corresponding lower shield segment are connected with each other through the shield segment jacks and the shield segment plugs; the middle parts of the shield upper duct piece and the shield lower duct piece are respectively provided with a grouting hole, the grouting holes are communicated with the gap, and grouting materials are filled into the gap through the grouting holes by arranging a grouting pressure gun.
The principle and the using method of the utility model are as follows:
this scheme experimental model box, similar material, shield construct section of jurisdiction slip casting hole, shield and go up section of jurisdiction, slip casting pressure gun, shield and construct section of jurisdiction, slip casting material, shield and construct section of jurisdiction jack and shield and construct section of jurisdiction plug down. The test model box and the similar materials form a simulated stratum; the upper and lower segments of the shield form a tunnel supporting system; the grouting pressure gun, the grouting material and the shield segment grouting hole form a segment grouting system; the shield constructs section of jurisdiction jack and shield constructs section of jurisdiction plug for section of jurisdiction connected system, will a round hole that slightly is bigger than the section of jurisdiction diameter is opened in advance in the middle part of the test model case and is taken sealed lid (all have around), fill up the test model case with similar material again, after the test model case is filled up with similar material, in the simulation shield excavation process, tunnel segment that the excavation has finished is put the section of jurisdiction under shield and put the section of jurisdiction together through prefabricated shield section of jurisdiction jack and shield section of jurisdiction plug, shield the section of jurisdiction under shield and put the section of jurisdiction jack and shield and put the section of jurisdiction plug together, aim at the slip casting pressure rifle shield section of jurisdiction grouting hole and will slip casting material shield the section of jurisdiction and shield the space between section of jurisdiction and similar material and fill up under the shield and the section of jurisdiction.
Compared with the prior art, the utility model has the beneficial effects that: the utility model has simple structure, firstly, prefabricating the upper and lower duct pieces of the shield, reserving the grouting holes, the jacks of the upper and lower duct pieces and the plugs, then assembling the duct pieces one by one in the process of simulating shield excavation, and aligning the grouting pressure gun to the grouting holes to ensure that the grouting material fully fills the gaps between the duct pieces and similar materials to simulate the process of actual shield duct piece assembly and post-wall grouting, so that the influence of shield construction on duct piece pressure and ground surface settlement under the action of grouting pressure can be more accurately simulated, data support can be provided for the actual construction working condition, the effect is better, the cost is low, and the utility model is more suitable for wide application.
Drawings
Fig. 1 is a front (rear) elevation view of a shield segment assembling and grouting device of the utility model;
fig. 2 is a left (right) elevation view of the shield segment assembling and grouting device of the utility model;
fig. 3 is a front (rear) elevation view of a duct piece of the utility model;
fig. 4 is a left (right) elevation view of a duct piece of the utility model.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a technical scheme that: a test device for simulating shield tunnel segment assembly and backfill grouting as shown in figures 1, 2, 3 and 4 comprises a test model box 1, wherein the test model box 1 is mainly used as a container for similar materials 2 and simulates stratum boundary conditions; the soil simulation material comprises similar materials 2, wherein the similar materials 2 are mainly used as likelihood materials of soil and simulate soil layers of actual working conditions; the shield segment grouting hole 3 is mainly used for facilitating the wall-back grouting of the segment; the shield tunnel comprises an upper shield segment 4 and a lower shield segment 6, wherein the upper shield segment 4 and the lower shield segment 6 are mainly used as supporting structures of the shield tunnel; the method comprises a grouting pressure gun 5 and a grouting material 7, wherein the grouting pressure gun 5 is mainly used for fully filling the grouting material 7 into gaps between a shield upper segment 4, a shield lower segment 6 and the similar material 2 through a reserved shield segment grouting hole 3; including shield structure section of jurisdiction jack 8 and shield structure section of jurisdiction plug 9, shield structure section of jurisdiction jack 8 and shield structure section of jurisdiction plug 9 mainly used are shield constructs segment 4 and shield structure segment 6 zonulae occludens together and the section of jurisdiction of being convenient for is dismantled.
Firstly, filling a test model box 1 with similar materials 2, compacting, then taking out a circular sealing cover (both front and back) reserved in the middle of the test model box 1, carrying out simulated excavation on a shield tunnel through an excavating tool, then carrying out segment assembly in a tunnel space after excavation is finished, and tightly assembling a shield upper segment 4 and a shield lower segment 6 together through a shield segment jack 8 and a shield segment plug 9. After the segment assembly is finished, the grouting pressure gun 5 is aligned to the shield segment grouting hole 3, and the grouting material 7 is fully filled in the gaps between the shield upper segment 4 and the shield lower segment 6 and the similar material 2. After the grouting material 5 is hardened, the segment assembly and grouting can be performed in a ring-by-ring manner by repeating the operation. During construction, various measuring elements (such as soil pressure boxes, strain gauges and the like) can be pre-embedded in the test model box 1 to obtain the physical and mechanical parameters of the process of segment assembling and grouting.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.
Claims (2)
1. The utility model provides a test device for simulating shield tunnel section of jurisdiction is assembled and slip casting behind wall, includes experimental mold box (1), its characterized in that: the method comprises the steps of arranging corresponding sealing covers in the middle positions of the front side and the rear side of a test model box (1), filling similar materials (2) into the test model box (1), arranging a round hole channel in the middle of the similar materials (2), enabling the positions of the two ends of the round hole to correspond to the sealing covers and forming a simulation tunnel section, arranging a measuring element in the test model box (1) at the corresponding position, sequentially installing a shield segment in the simulation tunnel section, forming a gap between the shield segment and the similar materials (2), and filling grouting materials (7) into the gap.
2. The test device for simulating segment splicing and grouting after the wall of the shield tunnel according to claim 1, characterized in that: the shield segment comprises a shield upper segment (4) and a shield lower segment (6), wherein one end of the shield upper segment (4) and one end of the shield lower segment (6) are provided with shield segment jacks (8), and the other end of the shield upper segment and the shield lower segment are provided with shield segment plugs (9), so that the corresponding shield upper segment (4) and the corresponding shield lower segment (6) are connected with each other through the shield segment jacks (8) and the shield segment plugs (9); the middle parts of the shield upper segment (4) and the shield lower segment (6) are provided with grouting holes (3), the grouting holes (3) are communicated with the gap, and grouting materials (7) are filled into the gap through the grouting holes (3) by arranging grouting pressure guns (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121656193.8U CN215332882U (en) | 2021-07-20 | 2021-07-20 | Test device for simulating shield tunnel segment assembly and backfill grouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121656193.8U CN215332882U (en) | 2021-07-20 | 2021-07-20 | Test device for simulating shield tunnel segment assembly and backfill grouting |
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| Publication Number | Publication Date |
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| CN215332882U true CN215332882U (en) | 2021-12-28 |
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| CN202121656193.8U Active CN215332882U (en) | 2021-07-20 | 2021-07-20 | Test device for simulating shield tunnel segment assembly and backfill grouting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000916A1 (en) * | 2022-07-01 | 2024-01-04 | 中铁隧道局集团有限公司 | Laboratory experiment device and experiment method for micro-perturbation grouting technology for subway in operation |
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2021
- 2021-07-20 CN CN202121656193.8U patent/CN215332882U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000916A1 (en) * | 2022-07-01 | 2024-01-04 | 中铁隧道局集团有限公司 | Laboratory experiment device and experiment method for micro-perturbation grouting technology for subway in operation |
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