CN212272203U - Shield constructs and wears existing subway tunnel simulation settlement control device down - Google Patents
Shield constructs and wears existing subway tunnel simulation settlement control device down Download PDFInfo
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- CN212272203U CN212272203U CN202022151713.1U CN202022151713U CN212272203U CN 212272203 U CN212272203 U CN 212272203U CN 202022151713 U CN202022151713 U CN 202022151713U CN 212272203 U CN212272203 U CN 212272203U
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Abstract
The utility model discloses a shield constructs and wears existing subway tunnel simulation settlement control device down, fill including inside has the transparent model case of simulation soil layer, be used for simulation soil layer is exerted pressure tight closing device, still including being located the intraformational excavation analogue means of simulation soil, simulation slip casting system, existing line analogue means, analogue means monitoring system and soil layer monitoring system of simulation soil inlay and locate whether take place the soil layer monitoring system who subsides the displacement as being used for observing in the simulation soil layer, the use of various steel ball, on the basis that does not increase the cost, monitoring system has been richened in the adjustment, has reached can be directly perceived, has obviously observed the effect that the soil layer subsides the displacement and changes.
Description
Technical Field
The utility model relates to a shield constructs and wears existing subway tunnel simulation settlement control device down.
Background
With the rapid development of urban subway networks, the situation that the shield penetrates the existing subway operation line is inevitably encountered. When the shield penetrates through the existing subway operation line in a short distance, influences such as uneven settlement, segment model cracking, track height difference, water seepage, water leakage and the like can be caused on the existing subway tunnel, great risks are brought to the existing subway operation safety, and in addition, certain settlement deformation risks are brought to surface buildings when the shield penetrates through the underground. Therefore, it is necessary to simulate the construction condition of the shield under the existing subway and predict the possible construction problems, thereby optimizing the construction measures during the shield under construction, ensuring the operation safety of the existing subway and avoiding damaging the surface buildings.
In the prior art, some simulation devices for simulating the shield tunneling under the existing subway tunnel mainly simulate the shield tunneling process, and obtain simulation data through a monitoring and data acquisition system arranged, so as to obtain the influence law under the corresponding working condition.
However, in the process of simulating shield tunneling, the influence of the post-grouting on the stratum and the existing tunnel is not considered, the simulated stratum stress conditions have certain difference, and the whole simulated construction process is not provided with an intuitive observation environment.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a shield constructs and wears existing subway tunnel simulation settlement control device down, can realize in the shield structure work progress in the simulation process, can be directly perceived, the obvious condition of the settlement displacement change of observing the soil layer.
In order to solve the technical problem, the utility model discloses a technical scheme is: a shield tunnel underground existing subway tunnel simulation settlement control device comprises a transparent model box filled with a simulation soil layer, a compaction device for pressing and compacting the simulation soil layer, an excavation simulation device, a simulation grouting system, an existing line simulation device, a simulation device monitoring system and a soil layer monitoring system, wherein the excavation simulation device, the simulation grouting system, the existing line simulation device, the simulation device monitoring system and the soil layer monitoring system are positioned in the simulation soil layer;
the existing line simulation device is positioned above the excavation simulation device, and the existing line simulation device and the excavation simulation device are in a spatial crossing shape;
the soil layer monitoring system comprises a plurality of colored steel balls which are embedded in a simulated soil layer and used for observing whether settlement displacement occurs or not;
the semi-circular starting steel sleeve and the semi-circular receiving steel sleeve are fixedly arranged on two opposite side portions of the bottom of the transparent model box, the starting steel sleeve is fixed inside the transparent model box, and the receiving steel sleeve is fixed outside the transparent model box.
In some embodiments, the simulated soil layer is made of transparent sand, and the plurality of color steel balls form a plurality of transverse observation bands extending in a direction parallel to the length direction of the existing line simulation device and form a plurality of longitudinal observation bands extending in a vertical direction and adjacent to the receiving steel sleeve.
In certain embodiments, the analog device monitoring system includes an earth pressure gauge disposed on top of the originating steel casing, with a data acquisition port connected to the earth pressure gauge via an electrical connection.
In some embodiments, the simulation device monitoring system further includes a plurality of displacement meters disposed on the top and the bottom of the existing line simulation device corresponding to the axis, and a plurality of strain gauges disposed on the left and right sides of the outer wall of the existing line simulation device, where the plurality of displacement meters and the plurality of strain gauges are respectively and uniformly distributed along the length direction of the existing line simulation device, the existing line simulation device is a polyvinyl chloride hollow cylindrical hard pipe, and the displacement meters and the strain gauges are connected to a data acquisition port through an electrical connection line.
In some embodiments, the excavation simulation device comprises a shield shell model and a multi-ring segment model, wherein the shield shell model can be used for tunneling from the starting steel sleeve to the receiving steel sleeve, the shield shell model is a semicircular steel pipe, the segment model is a semicircular polyethylene hard pipe, and the outer diameter of the segment model and the outer diameter of the shield shell model are both smaller than the inner diameters of the starting steel sleeve and the receiving steel sleeve.
In some embodiments, the simulated grouting system comprises a plurality of hoses, each ring of the segment model is internally provided with three simulated grouting ports along the circumferential direction, and the corresponding hose can extend into the simulated soil layer through the simulated grouting ports.
In some embodiments, the transparent mold box has graduation marks at four corners along the depth direction.
In some embodiments, the colored steel balls are steel dark spheres.
In some embodiments, the transparent model box comprises a box body, a box cover fixedly arranged at the top opening of the box body, and the pressing device comprises a pressurizing air bag arranged between the upper part of the simulated soil layer and the box cover and a pressurizing pump arranged outside the transparent model box and used for pressurizing the pressurizing air bag.
The scope of the present invention is not limited to the technical solutions formed by specific combinations of the above technical features, and other technical solutions formed by arbitrary combinations of the above technical features or equivalent features should be covered. For example, the above features and the technical features (but not limited to) having similar functions disclosed in the present application are mutually replaced to form the technical solution.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model provides an among the shield structure wears existing subway tunnel simulation settlement control device down, inlay a plurality of various steel balls and locate whether take place the soil layer monitoring system who subsides the displacement as being used for observing in the simulation soil layer, the use of various steel balls, on the basis that does not increase the cost, monitoring system has been richened in the adjustment, has reached can be directly perceived, obviously observe the effect that the soil layer subsides the displacement and changes.
Drawings
FIG. 1 is a front schematic view of a shield tunneling existing tunnel model of the present invention;
FIG. 2 is a side view of the shield tunneling machine of the present invention;
wherein: 1. a pressurized air bag; 2. simulating a soil layer; 3. color steel balls; 4. an existing line simulation device; 5. originating a steel casing; 6. a shield shell model; 7. a segment model; 8. a transparent mold box; 9. a box body and a box cover; 10. a pressure pump; 11. a steel sleeve is received.
Detailed Description
Wear the potential safety hazard that existing shield tunnel exists under the shield method tunnel, need simulate the construction influence before wearing down, it is right to combine specific embodiment and attached drawing below the utility model discloses do further detailed description.
As shown in the attached drawings 1-2, the simulated settlement control device for the shield underpass existing subway tunnel comprises a transparent model box 8 filled with a simulated soil layer 2, a compaction device for pressing and compacting the simulated soil layer 2, an excavation simulation device, a simulated grouting system, an existing line simulation device 4, a simulation device monitoring system and a soil layer monitoring system, wherein the excavation simulation device, the simulated grouting system, the existing line simulation device 4, the simulation device monitoring system and the soil layer monitoring system are positioned in the simulated soil layer 2;
And a semicircular starting steel sleeve 5 and a semicircular receiving steel sleeve 11 are fixed on two opposite sides of the bottom of the transparent model box 8, the starting steel sleeve 5 is fixed inside the transparent model box 8, and the receiving steel sleeve 11 is fixed outside the transparent model box 8. The excavation simulation device comprises a semicircular shield shell model 6 and a multi-ring semicircular segment model 7, wherein the semicircular shield shell model 6 and the multi-ring semicircular segment model are arranged between the starting steel sleeve 5 and the receiving steel sleeve 11.
The shield shell model 6 is a semicircular steel pipe, the outer diameter of the segment model 7 and the outer diameter of the shield shell model 6 are smaller than the inner diameters of the starting steel sleeve 5 and the receiving steel sleeve 11, the segment model 7 is a semicircular polyethylene segment model, and the adjacent segment models 7 are bonded through gypsum. The outer diameters of the duct piece model and the shield shell model are smaller than the inner diameters of the starting steel sleeve and the receiving steel sleeve, so that the difference of the building clearance between the duct piece model and the shield body in the actual shield excavation process can be accurately simulated.
The existing line simulation device 4 is positioned above the excavation simulation device, and the existing line simulation device and the excavation simulation device are in a space crossing shape.
Simulation slip casting system includes many hoses, every ring be provided with three simulation slip casting mouth along the hoop in the section of jurisdiction model 7, it is corresponding the hose passes through simulation slip casting mouth stretches into in the simulation soil layer 2, has considered the influence of grouting behind the wall to stratum and existing tunnel, can realize the disturbance of shield structure construction overall process, grouting behind the wall to the soil layer in the simulation process.
The soil layer monitoring system comprises a plurality of colored steel balls 3 which are embedded in the simulated soil layer 2 and used for observing whether sedimentation displacement occurs or not; the plurality of colored steel balls 3 constitute a plurality of lateral observation bands extending in parallel to the longitudinal direction of the existing line simulator 4, and constitute a longitudinal observation band extending in the vertical direction adjacent to the receiving steel sleeve. The color steel ball 3 is a steel dark sphere.
The simulation device monitoring system comprises an earth pressure gauge arranged at the top of the originating steel sleeve, and a data acquisition port is connected to the earth pressure gauge through an electric connection wire.
The simulation device monitoring system further comprises a plurality of displacement meters arranged on the top and the bottom corresponding to the axis of the existing line simulation device 4, a plurality of strain gauges arranged on the left side and the right side of the outer wall of the existing line simulation device 4, the plurality of displacement meters and the plurality of strain gauges are uniformly distributed along the length direction of the existing line simulation device 4 respectively, the existing line simulation device 4 is a polyvinyl chloride hollow cylinder hard pipe, and the displacement meters and the strain gauges are connected with a data acquisition port through electric connection wires.
The transparent sand filled inside is used as a transparent model box for simulating a soil layer, and the monitoring system is adjusted and enriched by using the colored steel balls on the basis of not increasing the cost, so that the effect of visually and obviously observing the change of the soil layer settlement displacement is achieved.
The utility model provides a pair of shield constructs and wears existing subway tunnel simulation settlement control method down adopts above-mentioned shield to wear existing subway tunnel simulation settlement control device down, include following step:
the method comprises the following steps: the soil pressure gauge is arranged at the top of the initial steel sleeve 5, the displacement gauges are evenly arranged at the top and the bottom corresponding to the axis of the existing line simulation device 4 along the length direction, the strain gauges are evenly arranged on the left side and the right side of the outer wall of the existing line simulation device 4, the soil pressure gauge, the displacement gauges and the strain gauges are connected to a data acquisition port through electric connection wires, the model soil layer 2 uses transparent sand, the simulation soil layer 2 is placed into the transparent model box 8 in a layered mode according to simulation conditions, the soil layer containing underground water conditions is simulated, a certain amount of water can be injected into the soil to simulate the underwater environment of the soil, after each layer of soil is compacted and stabilized, the next layer of soil is placed, and meanwhile, the existing line simulation device 4 and the color steel ball 3 monitoring belt are placed into the.
Step two: after the simulated soil layer 2 in the transparent model box 8 is placed, the pressurizing air bag 1 is placed at the top of the model soil layer 2, the box cover 9 is covered and fixed with the transparent model box 8, the pressurizing air bag 1 is pressurized by using the pressurizing pump 10, so that the effect of pressurizing the simulated soil layer 1 is achieved, after the numerical values of the soil pressure gauge at the position of the steel sleeve 5 to be started and the receiving steel sleeve 11 reach the requirements and tend to be stable, the current pressure is maintained and is not increased, and the current monitoring data is stored as initial data.
Step three: placing a shield shell model 6 at a starting steel sleeve 5, excavating soil towards a receiving steel sleeve 11 by using a small shovel, simultaneously tunneling the shield shell model 6 forwards, placing a segment model 7 at the rear part of the shield shell model 6 when the shield shell model 6 tunnels to the thickness of a ring canal sheet model, stopping propulsion, injecting slurry from a slurry injection port of the segment model 7 by using a hose, continuing tunneling forwards after the slurry injection is finished, placing a new ring segment model 7 when the tunnel canal sheet model tunnels to the thickness of the ring canal sheet model, then performing slurry injection operation, and repeating the operation process until the shield shell model 6 completely enters the receiving steel sleeve 11.
Step four: and recording data in each data acquisition port when a certain number of pipe piece rings are tunneled, photographing from the side surface of the transparent model box 8, recording the overall change condition of the colored steel ball 3 in the soil layer in the downward penetration process, and completing the simulated settlement control of the existing subway tunnel downward penetration of the shield.
After one tunnel finishes tunneling, the current excavation condition can be kept, and excavation simulation is continuously carried out at the starting steel sleeve of the other tunnel so as to simulate the downward-penetrating excavation condition of the double-track tunnel in the engineering.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (9)
1. The utility model provides a shield constructs and wears existing subway tunnel simulation settlement control device down which characterized in that: the soil layer compaction device comprises a transparent model box filled with a simulated soil layer, a compaction device for pressing and compacting the simulated soil layer, an excavation simulation device, a simulated grouting system, an existing line simulation device, a simulation device monitoring system and a soil layer monitoring system, wherein the excavation simulation device, the simulated grouting system, the existing line simulation device, the simulation device monitoring system and the soil layer monitoring system are positioned in the simulated soil layer;
the existing line simulation device is positioned above the excavation simulation device, and the existing line simulation device and the excavation simulation device are in a spatial crossing shape;
the soil layer monitoring system comprises a plurality of colored steel balls which are embedded in a simulated soil layer and used for observing whether settlement displacement occurs or not;
the semi-circular starting steel sleeve and the semi-circular receiving steel sleeve are fixedly arranged on two opposite side portions of the bottom of the transparent model box, the starting steel sleeve is fixed inside the transparent model box, and the receiving steel sleeve is fixed outside the transparent model box.
2. The simulated settlement control device for the shield tunneling under the existing subway tunnel according to claim 1, wherein: the simulation soil layer is made of transparent sand, and a plurality of color steel balls form a plurality of transverse observation bands which extend and are distributed along the length direction parallel to the existing line simulation device respectively and form a longitudinal observation band which is close to the receiving steel sleeve and extends and is distributed along the vertical direction.
3. The simulated settlement control device for the shield tunneling under the existing subway tunnel according to claim 2, wherein: the simulation device monitoring system comprises an earth pressure gauge arranged at the top of the originating steel sleeve, and a data acquisition port is connected to the earth pressure gauge through an electric connection wire.
4. The simulated settlement control device for the shield tunneling under the existing subway tunnel according to claim 3, wherein: the simulation device monitoring system further comprises a plurality of displacement meters arranged on the top and the bottom corresponding to the axis of the existing line simulation device, a plurality of strain gauges arranged on the left side and the right side of the outer wall of the existing line simulation device, the displacement meters and the strain gauges are uniformly distributed along the length direction of the existing line simulation device respectively, the existing line simulation device is a polyvinyl chloride hollow cylindrical hard pipe, and the displacement meters and the strain gauges are connected with a data acquisition port through electric connection wires.
5. The simulated settlement control device for the shield tunneling under the existing subway tunnel according to claim 2, wherein: the excavation simulation device comprises a shield shell model and a multi-ring duct piece model, wherein the shield shell model and the multi-ring duct piece model can be used for tunneling from the starting steel sleeve to the receiving steel sleeve, the shield shell model is a semicircular steel pipe, the duct piece model is a semicircular polyethylene hard pipe, and the outer diameter of the duct piece model and the outer diameter of the shield shell model are smaller than the inner diameters of the starting steel sleeve and the receiving steel sleeve.
6. The shield tunneling underground existing subway tunnel simulated settlement control device according to claim 5, characterized in that: the simulation slip casting system includes many hoses, every ring be provided with three simulation slip casting mouth along the hoop in the section of jurisdiction model, it is corresponding the hose can pass through the simulation slip casting mouth stretches into in the simulation soil layer.
7. The simulated settlement control device for the shield tunneling under the existing subway tunnel according to claim 1, wherein: and scale marks are arranged at four corners of the transparent model box along the depth direction of the transparent model box.
8. The simulated settlement control device for the shield tunneling under the existing subway tunnel according to claim 1, wherein: the color steel ball is a steel dark sphere.
9. The simulated settlement control device for the shield tunneling under the existing subway tunnel according to claim 1, wherein: the transparent model box comprises a box body and a box cover fixedly arranged at an opening at the top of the box body, and the pressing device comprises a pressurizing air bag arranged between the upper part of the simulated soil layer and the box cover and a pressurizing pump arranged outside the transparent model box and used for pressurizing the pressurizing air bag.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022151713.1U CN212272203U (en) | 2020-09-27 | 2020-09-27 | Shield constructs and wears existing subway tunnel simulation settlement control device down |
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| CN202022151713.1U CN212272203U (en) | 2020-09-27 | 2020-09-27 | Shield constructs and wears existing subway tunnel simulation settlement control device down |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687390A (en) * | 2022-04-24 | 2022-07-01 | 西南交通大学 | Newly-built subway station and existing station side connection test device and test method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687390A (en) * | 2022-04-24 | 2022-07-01 | 西南交通大学 | Newly-built subway station and existing station side connection test device and test method thereof |
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