CN210244824U - Multi-bin separated water bag drainage shield tunneling stratum loss simulation device - Google Patents
Multi-bin separated water bag drainage shield tunneling stratum loss simulation device Download PDFInfo
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- CN210244824U CN210244824U CN201920723293.4U CN201920723293U CN210244824U CN 210244824 U CN210244824 U CN 210244824U CN 201920723293 U CN201920723293 U CN 201920723293U CN 210244824 U CN210244824 U CN 210244824U
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Abstract
The utility model relates to a shield tunneling stratum loss simulation device for multi-bin separation type water bag drainage, which comprises a model test soil box with an opening at the upper end, wherein a horizontal model shield is arranged in the model test soil box, and the model test soil box outside the model shield is filled with stratum soil; the outer wall of the model shield is provided with a water bag along the longitudinal circumference, and the water bag is divided into a plurality of relatively independent chambers along the circumferential direction; each water bag chamber is provided with an independent drainage hose, one end of each drainage hose is connected into the water bag chamber, the other end of each drainage hose penetrates through a reserved hole of the model test soil box to be connected into a measuring cup outside the model test soil box, and the stratum loss is realized by controlling the drainage of the water bags. The utility model has the advantages of experimental apparatus is simple, the function is various, with low costs and technology is simple and convenient, can provide brand-new thinking and experimental mode for shield tunneling stratum loss mechanism and displacement law research under all kinds of operating modes, provide technical support for guaranteeing shield tunneling construction safety and all ring edge borders safety.
Description
Technical Field
The utility model belongs to the technical field of underground works, concretely relates to shield that many storehouses cellular-type water pocket drainage constructs tunnelling stratum loss analogue means.
Background
With the rapid development of economy, underground resources are fully utilized to provide a wide extension space for city development for guiding reasonable layout and ordered development of cities, in recent years, the underground space gradually develops towards a large buried depth and a large space, short-distance passing projects under various complex environments are continuously emerged, and the development and utilization of the urban underground space are limited to a certain extent. With the continuous development of shield technology, a major factor restricting the overall development of the technology at present is the loss of the shield tunneling stratum and the corresponding measures thereof. Under some working conditions, the method even becomes a control factor for restricting the shield construction method and the development of the underground space, and even leads the underground space to be incapable of being implemented.
Whether the stratum loss mechanism and the displacement control measure of shield tunneling are reasonable or not directly relates to the safety of the engineering and the surrounding environment and the engineering cost, and stratum loss and deformation measures are not in place, so that huge potential safety hazards and investment waste can be caused.
Disclosure of Invention
The utility model aims at providing a shield of many storehouses cellular-type water pocket drainage tunnelling stratum loss analogue means, set up the model shield in model test soil box, it arranges many storehouses divided water pockets to shield the circumferencial direction at the model, the water pocket vertically sets up according to specific interval along the tunnel, the model shield fills the model test foundation soil (stratum) anastomotic with original state soil all around, discharge through dividing storehouse water pocket interior liquid, to shield the arbitrary position of tunnel circumferencial direction, shield under the arbitrary stratum loss rate condition of the shield tunnelling operating mode simulates, make clear and definite typical operating mode and the influence and the counter-measure of stratum loss rate under the typical stratum condition.
The utility model discloses the technical scheme who adopts does:
the utility model provides a shield that many storehouses cellular-type water pocket drainage constructs tunnelling stratum loss analogue means which characterized in that:
the soil box comprises a model test soil box with an opening at the upper end, wherein a horizontal model shield is arranged in the model test soil box, and stratum soil is filled in the model test soil box outside the model shield;
the outer wall of the model shield is provided with a water bag along the longitudinal circumference, the stratum loss is simulated in the test, and the water bag is divided into a plurality of relatively independent chambers along the circumferential direction;
the water bag adopts a bag type infusion apparatus, and comprises a liquid bag and liquid inlet and outlet hoses, each water bag chamber is provided with an independent liquid inlet and outlet hose and a drainage hose, one end of the drainage hose is connected into the liquid inlet and outlet hose of the water bag chamber, and the other end of the drainage hose passes through a reserved hole of the model test soil box and is connected into a measuring cup outside the model test soil box.
And a differential digital display displacement meter is arranged on the surface of the stratum soil in the model test soil box, and differential digital display displacement meters and inclinometers are arranged at a plurality of depths in the stratum soil.
The drainage hose is provided with a flow regulator, and the stratum loss is realized by controlling the drainage quantity of the water bag through the flow regulator.
The water sac filled with water is adhered to the outer wall of the model shield through an adhesive.
The model test soil box comprises a box body structure with an opening at the upper end, wherein the box body structure comprises a model base at the bottom and a model side wall at the periphery.
A vertical rod for fixing the model shield is arranged between the bottom of the model shield and the model base;
and a cross bar for fixing the model shield is arranged between the two transverse sides of the model shield and the model side wall.
The front and one side of the side wall of the model are made of transparent toughened glass, and the other two sides and the base of the model are made of steel plates.
The model shield adopts a steel pipe to simulate a tunnel lining structure, a cross rod and a vertical rod for fixing adopt Q235H steel, wherein two ends of the cross rod are respectively welded on a side steel plate of the model test soil box and the arch of the model shield, and two ends of the vertical rod are respectively welded on a base steel plate of the model test soil box and the arch bottom of the model shield.
The utility model has the advantages of it is following:
the utility model provides a novel shield tunnel stratum loss simulation device. The model base and the side wall of the model test soil box can be processed by conventional welding or bolt connection, the toughened glass and the ribbed steel plate are drilled with through holes, connected by bolts and locked by nuts. The transverse rods and the vertical rods are used for fixing the model shield by conventional welding, related equipment and other auxiliary facilities are conventional mechanical equipment, the model test soil box, the model shield, the drainage facility, model foundation soil (stratum) and the like are all conventional materials, a steel plate is made of Q235 steel, transparent toughened glass is adopted on the front side and one side surface of a model side wall, a screened field soil body is adopted in the model soil (stratum), and a differential digital display displacement meter for monitoring stratum deformation is conventional measuring equipment.
The multi-bin separated water bag drainage shield tunneling stratum loss simulation device can test any part in the circumferential direction of a tunnel, any stratum loss rate and shield tunneling stratum loss conditions under various stratum conditions, effectively solves the problem that a conventional test can only simulate stratum loss of a vault area of the tunnel, cannot reflect actual engineering requirements, particularly the stratum loss condition of a lower half section of the tunnel, is beneficial to more comprehensively reflecting shield tunneling risks under complex working conditions, and is beneficial to ensuring the self safety and the safety of the surrounding environment of tunnel engineering.
The multi-bin separated water bag drainage system can flexibly adjust the volume and the arrangement of the water bags according to the stratum characteristics and the actual engineering condition, thereby meeting the requirements of various projects. The utility model discloses have higher economic benefits and social, have extensive application prospect in underground structure engineering such as urban rail transit, municipal highway, civil buildings.
Drawings
FIG. 1 shows the distribution of model shield and water bag.
Fig. 2 is a cross-sectional view of the model shield and the model test soil box.
FIG. 3 is a longitudinal section view of a model shield and a model test soil box.
In the figure, 1-a model base, 2-a model side wall, 3-a displacement digital display instrument, 4-a model shield, 5-a cross bar for fixing the model shield, 6-a vertical bar for fixing the model shield, 7-a water bag, 8-a drainage hose, 9-stratum soil, 10-a measuring cup and 11-a flow regulator.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The utility model relates to a shield of many storehouses cellular-type water pocket drainage tunnelling stratum loss analogue means, including inclosed model test soil box, the model test soil box is provided with horizontally model shield 4, and the model shield 4 outer model test soil box is filled up stratum soil 9. The outer wall of the model shield 4 is provided with a water bag 7 along the longitudinal circumference, and the water bag 7 is divided into a plurality of relatively independent chambers along the circumferential direction. The water bag 7 is firmly adhered to the outer wall of the model shield 4 by using a binder, the water bag 7 adopts a bag type infusion apparatus and comprises a liquid bag and liquid inlet and outlet hoses, each water bag 7 chamber is provided with an independent liquid inlet and outlet hose and a drainage hose 8, one end of the drainage hose 8 is connected into the liquid inlet and outlet hose of the water bag 7 chamber, and the other end of the drainage hose passes through a reserved hole of the model test soil box and is connected into a measuring cup 10 outside the model test soil box.
Differential digital display displacement meters are arranged on the surface of the stratum soil 9 in the model test soil box, and differential digital display displacement meters and inclinometers are arranged at a plurality of depth positions in the stratum soil 9. The displacement measuring systems are connected with a displacement digital display instrument 3 through lead wires and record surface and underground displacement data in the water discharging process of the water bag 7.
Water in a multi-bin separation water bag 7 bundled on the outer wall of the model shield 4 is discharged from the water bag 7 in sequence by manually controlling respective flow regulators, and the discharged water is connected into a measuring cup 10 outside a model test soil box to calculate the stratum loss.
The model test soil box comprises a box body structure with an opening at the upper end, wherein the box body structure comprises a model base 1 at the bottom and a model side wall 2 at the periphery. A vertical rod 6 for fixing the model shield is arranged between the bottom of the model shield 4 and the model base 1; and a cross rod 5 for fixing the model shield is arranged between the two transverse sides of the model shield 4 and the model side wall 2.
One side of the model side wall 2 is made of toughened glass transparent material, and the other side of the model side wall 2 and the model base 1 are made of Q235 steel plate material; drilling through holes on the toughened glass and the ribbed steel plate, connecting the toughened glass and the ribbed steel plate by bolts, and locking the toughened glass and the ribbed steel plate by nuts.
The model shield 4 adopts a steel pipe to simulate a tunnel lining structure, a cross rod 5 and a vertical rod 6 for fixing adopt Q235H steel, wherein two ends of the cross rod 5 are respectively welded on a lateral steel plate 2 of the model test soil box and the arch waist of the model shield 4, and two ends of the vertical rod 6 are respectively welded on a base steel plate 1 of the model test soil box and the arch bottom of the model shield 4.
The method for simulating the stratum loss of the shield tunneling of multi-bin separated water bag drainage by adopting the device structure comprises the following steps:
the method comprises the following steps: assembling a model test soil box by using the model base 1 and the model side wall 2;
step two: fixing a model shield 4 at a certain height from the model base 1 in the model test soil box by using a vertical rod 6 for fixing the model shield and a horizontal rod 5 for fixing the model shield;
step three: the water bag 7 filled with water is tied to the outer wall of the model shield 4 through the latex rubber ring, the other end of the drainage hose 8 penetrates through the reserved hole of the toughened glass of the model test soil box to be connected into the measuring cup 10 outside the model test soil box, and the stratum loss is realized by controlling the drainage quantity of the water bag 7.
Step four: configuring stratum soil 9 according to requirements, preparing model test foundation soil by a sand rain method, filling the stratum soil in layers to a thickness not greater than 10cm, simultaneously injecting free water into the top of a model test soil box after the preparation of the model foundation soil is finished until the water level of the stratum soil 9 meets the design requirements, waiting for 24-36 h after the filling of a test soil body is finished, and performing a test after the stratum soil 9 is solidified to a certain degree.
Step five: arranging a differential digital display displacement meter on the surface of a soil body, arranging a deep differential digital display displacement meter and an inclinometer within the depth range of the stratum soil 9, connecting the differential digital display displacement meter and the inclinometer with a displacement digital display 3, and recording the displacement change in the ground and the surface settlement deformation condition in the test process;
step six: along the tunneling direction of the shield tunnel, water in the multi-bin separation water bags 7 is discharged from the water bags 7 in sequence through respective flow regulators 11 which are manually controlled, and the discharged water is connected into a measuring cup 10 to calculate the stratum loss;
step seven: in the drainage process of the water bag 7, the displacement data of the earth surface and the ground are recorded through the displacement digital display 3, and the influence of the stratum loss after shield tunneling, the stratum loss part, the tunnel burial depth and the like on earth surface settlement and the transmission mechanism of the stratum loss in the stratum are analyzed and researched.
The utility model has the advantages of the model is simple, succinct easily do, device low cost just can realize multiplex condition simulation. The volume of the sub-bin water bag and the ring are arranged longitudinally, the sub-bin water bag can be flexibly adjusted according to shield tunneling working conditions and stratum conditions, shield tunneling working condition simulation at any position in the circumferential direction of the shield tunnel and under the condition of any stratum loss rate can be realized, and a potential difference dynamic digital displacement meter arranged in the soil layer can record stratum displacement or deformation rules under corresponding various working conditions, so that basis is provided for stratum loss engineering risks and risk treatment measures.
The content of the present invention is not limited to the examples, and any equivalent transformation adopted by the technical solution of the present invention is covered by the claims of the present invention by those skilled in the art through reading the present invention.
Claims (8)
1. The utility model provides a shield that many storehouses cellular-type water pocket drainage constructs tunnelling stratum loss analogue means which characterized in that:
the soil box comprises a model test soil box with an opening at the upper end, wherein a horizontal model shield (4) is arranged in the model test soil box, and stratum soil (9) is filled in the model test soil box outside the model shield (4);
the outer wall of the model shield (4) is provided with a water bag (7) along the longitudinal circumference, the stratum loss is simulated in the test, and the water bag (7) is divided into a plurality of relatively independent chambers along the circumferential direction;
the water bag (7) adopts a bag type infusion apparatus, which comprises a liquid bag and liquid inlet and outlet hoses, each water bag (7) chamber is provided with an independent liquid inlet and outlet hose and a drainage hose (8), one end of the drainage hose (8) is connected into the liquid inlet and outlet hose of the water bag (7) chamber, and the other end of the drainage hose passes through a reserved hole of the model test soil box and is connected into a measuring cup (10) outside the model test soil box.
2. The multi-bin partitioned water bag drainage shield tunneling stratum loss simulation device according to claim 1, wherein:
differential digital display displacement meters are arranged on the surface of stratum soil (9) in the model test soil box, and differential digital display displacement meters and inclinometers are arranged at a plurality of depth positions in the stratum soil (9).
3. The multi-bin partitioned water bag drainage shield tunneling stratum loss simulation device according to claim 2, wherein:
the drainage hose (8) is provided with a flow regulator (11), and the stratum loss is realized by controlling the drainage quantity of the water bag (7) through the flow regulator (11).
4. The multi-bin partitioned water bag drainage shield tunneling stratum loss simulation device according to claim 3, wherein:
the water sac (7) filled with water is adhered to the outer wall of the model shield (4) through an adhesive.
5. The multi-bin partitioned water bag drainage shield tunneling stratum loss simulation device according to claim 4, wherein:
the model test soil box comprises a box body structure with an opening at the upper end, wherein the box body structure comprises a model base (1) at the bottom and a model side wall (2) at the periphery.
6. The multi-bin partitioned water bag drainage shield tunneling stratum loss simulation device according to claim 5, wherein:
a vertical rod (6) for fixing the model shield is arranged between the bottom of the model shield (4) and the model base (1);
and a cross bar (5) for fixing the model shield is arranged between the transverse two sides of the model shield (4) and the model side wall (2).
7. The multi-bin divided water-bag drained shield tunneling stratum loss simulation device according to claim 6, wherein:
the front and one side of the model side wall (2) are made of transparent toughened glass, and the other two sides and the model base (1) are made of steel plates.
8. The multi-bin divided water-bag drained shield tunneling stratum loss simulation device according to claim 7, wherein:
the model shield (4) adopts a steel pipe to simulate a tunnel lining structure, a cross rod (5) and a vertical rod (6) for fixing adopt Q235H steel, wherein two ends of the cross rod (5) are respectively welded on the arch waists of the model side wall (2) and the model shield (4), and two ends of the vertical rod (6) are respectively welded on the arch bottoms of the model base (1) and the model shield (4).
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| CN201920723293.4U CN210244824U (en) | 2019-05-20 | 2019-05-20 | Multi-bin separated water bag drainage shield tunneling stratum loss simulation device |
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| CN201920723293.4U CN210244824U (en) | 2019-05-20 | 2019-05-20 | Multi-bin separated water bag drainage shield tunneling stratum loss simulation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281179A (en) * | 2021-05-21 | 2021-08-20 | 中铁第一勘察设计院集团有限公司 | Shield tunnel excavation model test box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281179A (en) * | 2021-05-21 | 2021-08-20 | 中铁第一勘察设计院集团有限公司 | Shield tunnel excavation model test box |
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