CN117703426A - Pipe segment and cast-in-place concrete segment combined structure for tunnel model test platform - Google Patents
Pipe segment and cast-in-place concrete segment combined structure for tunnel model test platform Download PDFInfo
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- CN117703426A CN117703426A CN202311855254.7A CN202311855254A CN117703426A CN 117703426 A CN117703426 A CN 117703426A CN 202311855254 A CN202311855254 A CN 202311855254A CN 117703426 A CN117703426 A CN 117703426A
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- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 239000011435 rock Substances 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 10
- 238000011065 in-situ storage Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 description 7
- 238000011160 research Methods 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
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- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a pipe segment and cast-in-place concrete segment combined structure for a tunnel model test platform, which comprises the following components: a segment structure and a cast-in-place concrete segment structure connected in a longitudinal direction, wherein: the segment structure comprises: the base is a plate body which is horizontally arranged; the ring-forming tube sheets are annular and are vertically arranged on the base and sequentially laminated and stacked longitudinally to form tube segments; an inner bottom, which is used for pouring concrete plates and is positioned at the bottom of each annular pipe piece; on the insole, a first rail running back and forth is provided. The cast-in-place concrete segment structure is a cast-in-place lining structure and is connected with the rear end of the segment structure in a front-back upward direction in a opposite way; the width and the height of the tube segment are consistent with those of the tube segment structure; the elevation of the inner bottom plate is consistent with the elevation of the inner bottom plate of the segment structure. The combined structure reduces the complicated process of singly adopting tunnel model segments or tunnel model cast-in-place concrete for experimental study.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering, and particularly relates to a pipe segment and cast-in-place concrete segment combined structure for a tunnel model test platform.
Background
Because of the complexity of geological conditions of tunnel engineering, the mechanical response rules of the tunnel supporting structure and surrounding rock and soil bodies are not uniformly known, the model test can qualitatively or quantitatively reflect the stress characteristics of natural rock and soil bodies related to the tunnel engineering, the engineering structure and surrounding rock are considered as a unity, the influence of geological factors such as bedding, karst cave, groundwater seepage and the like on the stability of the rock and soil engineering can be better reflected, the constitutive relation of complex rock and soil bodies is not required to be established, and the result can be directly given out through the test, so that the embarrassment of 'describing mechanism' is avoided under the condition that the mechanism research of the rock and soil bodies is not obvious, the test process and the result are automatically generated by directly utilizing the built-in mechanism of physical entity, and the test process and the result are mutually verified with a mathematical model. Therefore, the indoor similar model test has unique advantages in scientific research and solving the practical problems of tunnel engineering.
The indoor similar model test plays an important role in the development of underground engineering rock-soil body mechanics, more and more students begin to study in recent years at home and abroad, and a plurality of tunnel engineering indoor similar model test benches are developed successively.
The tunnel structure forms of the existing tunnel engineering simulation test platform are mainly two types: (1) shield method tunnel segment lining structure. And hoisting the duct piece by adopting a gantry crane or an automobile crane, and then assembling into a ring to form a tunnel duct piece structure. When the tube piece structure is used for a simulation test, two placing modes of transverse placing or vertical placing can be adopted according to test requirements and purposes; (2) a cast-in-place concrete lining structure of a mine tunnel. And casting concrete by adopting a vertical mould according to the similarity ratio to form the tunnel cast-in-place concrete lining structure. The placement mode is consistent with that of the site, and then different test researches are carried out according to test requirements and purposes. The two tunnel engineering simulation test platforms have the advantages of single tunnel structure form and small design and construction difficulty. One of the purposes is to carry out loading/stacking test on the periphery of the tunnel to test structural mechanics and deformation index values, and provide references for tunnel design construction. The second purpose is to build a tunnel defect simulation and treatment test platform, at the moment, defect setting types are limited, the initial data and the past test data of the tunnel structure defects of the cast-in-place concrete section and the segment cannot be compared and analyzed, and the diversified repair and reinforcement schemes and the reinforcement effects cannot be formulated by combining different treatment and repair technologies and defect types. The domestic tunnel engineering simulation test platform is fresh in a tunnel model of a combined structure of a segment and a cast-in-place concrete segment which really exist in the field under special geological conditions, so that the two application test researches are developed.
Disclosure of Invention
The invention aims to provide a pipe segment and cast-in-place concrete segment combined structure for a tunnel model test platform, which reduces the complicated process of singly adopting tunnel model segments or tunnel model cast-in-place concrete for test research.
The invention adopts the following technical scheme: a pipe segment and cast-in-place concrete segment composite structure for a tunnel model test platform, comprising: a segment structure and a cast-in-place concrete segment structure connected in a longitudinal direction, wherein: the segment structure comprises:
the base is a plate body which is horizontally arranged;
the plurality of ring-forming tube segments are annular and are vertically arranged on the base, and are sequentially laminated and stacked along the longitudinal direction to form tube segments; the projection of the circle center of each annular pipe piece is positioned on the front-back central line on the base;
the inner bottom is used for pouring concrete plates, is positioned at the bottom of each looping pipe piece, and the left and right parts of the inner bottom are symmetrical with the diameter of the looping pipe piece in the vertical direction; on the insole, a first rail running back and forth is provided.
The cast-in-place concrete segment structure is a cast-in-place lining structure and is connected with the rear end of the segment structure in a front-back upward direction in a opposite way; the width and the height of the tube segment are consistent with those of the tube segment structure; the elevation of the inner bottom plate is consistent with the elevation of the inner bottom of the segment structure; a second rail connected with the first rail is arranged on the inner bottom plate.
Further, the segment structure further comprises:
the short side walls are vertically arranged at the left end and the right end of the base and arranged along the front-back trend of the base;
the two bottom joists are arranged on the base, distributed at the left end and the right end of the annular duct piece and arranged along the front-back trend of the base (); the upper ends of the bottom joists are attached to the outer wall of the annular duct piece at the side where the bottom joists are located and used for supporting and fixing the annular duct piece.
And backfilling plain concrete on the base and between the short side wall and the bottom joist.
Further, a transition section ring beam is arranged at the joint of the pipe section structure and the cast-in-place concrete section structure, cast-in-place concrete or steel rings are adopted, and the front end and the rear end of the transition section ring beam are respectively covered on the outer walls of the corresponding pipe section structure and the cast-in-place concrete section structure.
Further, the front end of the duct piece structure is coaxially connected with an end wall ring beam, the diameter of the end wall ring beam is the same as that of the annular duct piece, and the end wall ring beam is fixed through a portal connecting bolt and used for fixing the annular duct piece.
Further, the cast-in-place concrete section structure adopts a combination of an IV-level surrounding rock cast-in-place lining structure and a V-level surrounding rock cast-in-place lining structure which are integrally connected front and back.
The beneficial effects of the invention are as follows: 1. the combined structure of the segment and the cast-in-place concrete segment actually existing in the field under special geological conditions is considered, so that the tunnel model segment and the cast-in-place concrete segment can be subjected to test research simultaneously, and the complicated process of singly adopting the tunnel model segment or the tunnel model cast-in-place concrete for test research is reduced. 2. If the loading/stacking test is carried out around the tunnel model, the combined structure can simultaneously test the structural mechanics and deformation index values of the test tube segment and the cast-in-place concrete segment, and provides a reference for tunnel design construction. 3. The combined structure is used for constructing a tunnel disease simulation and treatment test platform, can realize multiple disease setting types and complete door types, and meets the requirement of multiple disease data acquisition; meanwhile, the method can also carry out the initial test data and the past test data of the tunnel structure defects of the pipe segment and the cast-in-place concrete segment, and combines different defect repair materials and defect types to formulate diversified repair and reinforcement schemes and analyze reinforcement effects.
Drawings
FIG. 1 is a schematic view of a combined structure of a pipe segment and a cast-in-place concrete segment for a tunnel model test platform;
FIG. 2 is a schematic view of a segment structure;
wherein: 1. a segment structure; 1-1, forming a ring segment; 1-2, a base; 1-3, short side walls; 1-4, bottom joists; 1-5, track; 1-6, plain concrete; 1-7. An insole; 2. cast-in-place concrete segment structure; 2-1. IV-level surrounding rock cast-in-situ lining structure; 2-2, a V-level surrounding rock cast-in-situ lining structure; 3. a transition section ring beam; 4. end wall ring beam.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention relates to a combined structure of a pipe segment and a cast-in-place concrete segment for a tunnel model test platform, which is shown in figures 1 and 2 and comprises the following components: the segment structure 1 and the cast-in-place concrete segment structure 2 which are longitudinally connected define the front-back direction as the longitudinal direction, wherein:
a pipe segment structure 1 comprising:
the base 1-2 is a plate body which is horizontally arranged;
the short side walls 1-3 are vertically arranged at the left end and the right end of the base 1-2 and are arranged along the front-back trend of the base 1-2;
the plurality of ring-forming tube segments 1-1 are annular and are vertically arranged on the base 1 and sequentially laminated and stacked along the longitudinal direction to form tube segments; and the projection of the circle center of each looping segment 1-1 is positioned on the central line of the front and back directions on the base 1-2;
the two bottom joists 1-4 are arranged on the base 1 and distributed at the left end and the right end of the annular duct piece 1-1 and are arranged along the front-back trend of the base; the upper ends of the bottom joists are attached to the outer wall of the annular duct piece 1-1 on the side where the bottom joists are positioned and used for supporting and fixing the annular duct piece 1-1;
backfilling full concrete 1-6 on the base 1-2 and between the short side wall 1-3 and the bottom joist 1-4;
the inner bottom 1-7 is a poured concrete slab and is positioned at the bottom of each looping pipe piece 1-1, and the left and right parts of the inner bottom are symmetrical with the diameter of the looping pipe piece 1-1 in the vertical direction; on the insole 1-7, a first rail 1-5 running back and forth is provided.
The front end of the duct piece structure 1 is coaxially connected with an end wall ring beam 4, and the diameter of the end wall ring beam 4 is the same as that of the annular duct piece 1-1 and is fixed by a portal connecting bolt for fixing the annular duct piece 1-1.
As an example, the outer diameter of the ring segment 1-1 may be selected to be 6m, the length of each ring segment is 1.5m, and the thickness is 30cm. In actual construction, firstly, a base 1-2 with the thickness of 25cm is constructed, a bottom joist 1-4 which runs forwards and backwards is respectively constructed on the left side and the right side of a central line in the front-back direction of the base 1-2, then a short side wall 1-3 is constructed on the left end and the right end of the base 1-2 along the front-back direction, the height of the short side wall 1-3 is 1.8m, and the thickness is 30cm; then hoisting each looping duct piece 1-1 in turn, wherein each looping duct piece 1-1 is vertically arranged, the projection of the center of the looping duct piece is positioned on the front-back central line of the base 1-2, and the outer side walls which are left and right and close to the bottom are attached to the top of the bottom joist 1-4 on the side where the looping duct piece is positioned; the shape of the top of the bottom joist 1-4 is consistent with the shape of the outer side wall of the joint of the annular duct piece 1-1. Then backfilling plain concrete 1-6 on the base 1-2 and between the short side wall 1-3 and the bottom joist 1-4; and finally, pouring bottom concrete in the looping duct piece 1-1 into the inner bottom 1-7.
The cast-in-place concrete segment structure 2 is a cast-in-place lining structure and is connected with the rear end of the segment structure 1 in a front-back upward direction in a opposite way; the width and the height of the tube segment structure are consistent with those of the tube segment structure 1; the elevation of the inner bottom plate is consistent with the elevation of the inner bottom 1-7 of the pipe segment structure 1; the bottom plate is provided with second tracks, and the distance between the second tracks is the same as the left-right distance between the first tracks 1-5.
The cast-in-place concrete segment structure 2 can select a combination of an IV-level surrounding rock cast-in-place lining structure and a V-level surrounding rock cast-in-place lining structure, the thickness of the IV-level surrounding rock cast-in-place lining structure is 30cm, a primary rib is phi 20@150mm, a secondary rib is phi 18@150mm, and a hook rib is phi 10 circumferential direction@150 longitudinal direction@300 mm. The thickness of the V-level surrounding rock cast-in-situ lining structure is 40cm, the main rib adopts phi 22@100mm, the secondary rib adopts phi 18@150mm, and the hook rib adopts phi 10 circumferential direction@100 longitudinal direction@300 mm.
The IV-level surrounding rock cast-in-situ lining structure and the V-level surrounding rock cast-in-situ lining structure can be adjusted according to actual distribution conditions on site. The bottom plate in the cast-in-place concrete section structure 2 is sequentially distributed with a broken stone cushion layer, a concrete cushion layer, a self-adhesive asphalt waterproof coiled material, a waterproof protection layer top and a cast-in-place section bottom plate inner bottom from bottom to top. The total thickness of the broken stone cushion layer, the concrete cushion layer, the self-adhesive asphalt waterproof coiled material and the waterproof protective layer which are added together is 25cm, and the total thickness is the same as that of the base 1-2 of the segment structure 1. The thickness of the bottom plate inner bottom of the cast-in-situ section is 60cm, which is equal to the sum of the thicknesses of the inner bottom 1-7 and the looping segment 1-1.
The transition section ring beam 3 is arranged at the joint of the pipe segment structure 1 and the cast-in-place concrete segment structure 2, adopts cast-in-place concrete or steel rings, and the front end and the rear end of the transition section ring beam respectively cover the outer walls of the corresponding pipe segment structure 1 and the cast-in-place concrete segment structure 2. The thickness of the transition section ring beam 3 is 25cm, and the thickness of the transition section ring beam is 55cm after being overlapped with the ring-forming tube piece 1-1. The transition section ring beam 3 and the looping segment 1-1 are fixed by adopting a connecting bolt.
Claims (5)
1. A pipe section and cast in situ concrete section integrated configuration for tunnel model test platform, characterized in that includes: a segment structure (1) and a cast-in-place concrete segment structure (2) connected in the longitudinal direction, wherein:
the segment structure (1) comprises:
the base (1-2) is a plate body which is horizontally arranged;
the plurality of ring forming pipe pieces (1-1) are annular and are vertically arranged on the base (1) and are sequentially laminated and stacked longitudinally to form pipe pieces; the projection of the circle center of each looping segment (1-1) is positioned on the central line of the front and back directions on the base (1-2);
an insole (1-7) which is used for pouring concrete slabs, is positioned at the bottom of each loop forming pipe piece (1-1) and has the left and right parts which are symmetrical with respect to the vertical diameter of the loop forming pipe piece (1-1); on the insole (1-7) a first track (1-5) running back and forth is provided.
The cast-in-place concrete segment structure (2) is a cast-in-place lining structure and is connected with the rear end of the segment structure (1) in a front-back upward direction; the width and the height of the tube segment structure are consistent with those of the tube segment structure (1); the elevation of the inner bottom plate is consistent with the elevation of the inner bottom plate (1-7) of the segment structure (1); and a second track connected with the first track is arranged on the inner bottom plate.
2. A pipe segment and cast-in-place concrete segment composite structure for a tunnel model test platform according to claim 1, wherein the pipe segment structure (1) further comprises:
the short side walls (1-3) are vertically arranged at the left end and the right end of the base (1-2) and are arranged along the front-back trend of the base (1-2);
the two bottom joists (1-4) are arranged on the base (1) and distributed at the left end and the right end of the loop forming pipe piece (1-1) along the front-back trend of the base (1-4); the upper end of each bottom joist () is attached to the outer wall of the loop forming pipe sheet (1-1) at the side where the bottom joist () is located, and is used for supporting and fixing the loop forming pipe sheet (1-1).
And backfilling plain concrete (1-6) on the base (1-2) and between the short side wall (1-3) and the bottom joist (1-4).
3. A pipe segment and cast-in-place concrete segment combined structure for a tunnel model test platform according to claim 2, characterized in that a transition segment ring beam (3) is arranged at the joint of the pipe segment structure (1) and the cast-in-place concrete segment structure (2), cast-in-place concrete or steel rings are adopted, and the front end and the rear end of the transition segment ring beam respectively cover the outer walls of the corresponding pipe segment structure (1) and the cast-in-place concrete segment structure (2).
4. A pipe section and cast-in-place concrete section combined structure for a tunnel model test platform according to claim 3, characterized in that an end wall ring beam (4) is coaxially connected to the front end of the pipe section structure (1), the diameter of the end wall ring beam (4) is the same as the diameter of the loop forming pipe (1-1), and the loop forming pipe (1-1) is fixed by a portal connection bolt for fixing the loop forming pipe (1-1).
5. The pipe segment and cast-in-place concrete segment combined structure for the tunnel model test platform as claimed in claim 1, wherein the cast-in-place concrete segment structure (2) is formed by combining an IV-level surrounding rock cast-in-situ lining structure and a V-level surrounding rock cast-in-situ lining structure which are integrally connected in a front-back mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311855254.7A CN117703426A (en) | 2023-12-29 | 2023-12-29 | Pipe segment and cast-in-place concrete segment combined structure for tunnel model test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311855254.7A CN117703426A (en) | 2023-12-29 | 2023-12-29 | Pipe segment and cast-in-place concrete segment combined structure for tunnel model test platform |
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| Publication Number | Publication Date |
|---|---|
| CN117703426A true CN117703426A (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311855254.7A Pending CN117703426A (en) | 2023-12-29 | 2023-12-29 | Pipe segment and cast-in-place concrete segment combined structure for tunnel model test platform |
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| Country | Link |
|---|---|
| CN (1) | CN117703426A (en) |
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2023
- 2023-12-29 CN CN202311855254.7A patent/CN117703426A/en active Pending
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