CN111155369B - Ballastless track foundation bed structure and method for determining strip-shaped foundation width thereof - Google Patents
Ballastless track foundation bed structure and method for determining strip-shaped foundation width thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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- E01B2/00—General structure of permanent way
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Abstract
The invention relates to the field of high-speed railway roadbed engineering, in particular to a ballastless track foundation bed structure and a method for determining the width of a strip-shaped foundation thereof, wherein the ballastless track foundation bed structure comprises a foundation bed and at least two strip-shaped foundations which are horizontally arranged at intervals, an energy dissipation device is arranged between every two adjacent strip-shaped foundations, the energy dissipation device is an elastic structural member, the top of each strip-shaped foundation is connected with a supporting plate, and the top of each supporting plate is connected with the foundation bed. The ballastless track foundation bed structure is provided with the strip-shaped foundation and the energy dissipation device, so that the foundation bed arch caused by expansion of the expanded rock can be effectively prevented, the structure is only required to be constructed in a layered mode from bottom to top, the construction is convenient, and the construction cost is low.
Description
Technical Field
The invention relates to the field of high-speed railway roadbed engineering, in particular to a ballastless track foundation bed structure and a method for determining the width of a strip-shaped foundation thereof.
Background
Along with the rapid development of high-speed rail construction in China, ballastless track high-speed railways penetrating through the expansive rock areas are more and more. The expansive force of the expansive rock is large, after the surface water infiltrates, the cutting bed is arched, so that the running smoothness of the high-speed rail is influenced, and the running safety of the train is endangered.
The invention patent of application number 201710603423.6 discloses a ballastless track railway expanded rock cutting structure and a construction method, and the method provides an anti-arching structure formed by combining a prestressed anchor rope, an anchor plate and a pressure relief hole;
The invention patent of application number 201710609816.8 discloses a ballastless track railway expansive soil cutting structure and a construction method, the method is mainly applied to expansive soil foundations, the released deformation space is limited, when the method is used for expanding rock foundations, if the condition is used for completely resisting larger arch force, the setting depth and density of CFG piles are required to be increased, the construction process is complex, and the engineering investment is increased.
The invention patent of application number 201810424707.3 discloses an anti-uplift structure of an expansive soft rock ballastless track cutting bed and a construction method, and uplift deformation is eliminated by longitudinally and transversely arranging deep energy dissipation holes and shallow energy dissipation holes in a rock mass. However, the patent designs anchor cables, longitudinal and transverse energy dissipation holes and the like, the construction process is complex, and the engineering investment is large.
Disclosure of Invention
The invention aims at: aiming at the problems of complex construction process and large engineering investment of the expanded rock cutting foundation bed structure in the prior art, the invention provides a ballastless track foundation bed structure and a method for determining the width of a strip-shaped foundation thereof, which can effectively prevent the foundation bed from arching due to the expansion of expanded rock, and has the advantages of convenient construction and low engineering cost.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The ballastless track foundation bed structure comprises a foundation bed, and further comprises at least two strip-shaped foundations arranged at horizontal intervals, wherein an energy dissipation device is arranged between the strip-shaped foundations, the energy dissipation device is an elastic structural member, the top of the strip-shaped foundations is connected with a supporting plate, and the top of the supporting plate is connected with the foundation bed.
When the ballastless track foundation bed structure is used, all the strip-shaped foundations and the energy dissipation devices are arranged on the expandable rock cutting, the energy dissipation devices are arranged between the strip-shaped foundations, the supporting plates are arranged on the strip-shaped foundations, and the foundation beds are arranged on the supporting plates, because the energy dissipation devices are elastic structural members, the expansion force generated by the expandable rock below the energy dissipation devices is absorbed by the energy dissipation devices and is not transmitted to the foundation beds, the expansion force generated by the expandable rock below the strip-shaped foundations is directly transmitted to the foundation beds, the expansion force can be counteracted by the self-gravity of the strip-shaped foundations, the supporting plates and the foundation beds, the expansion force received by the foundation beds is effectively reduced by reducing the contact area between the foundation beds and the expandable rock mass, and the effective expansion force received by counteracting the self-gravity of the foundation beds is utilized, the purpose of avoiding the foundation beds to arch, and the foundation beds arch can be effectively prevented.
And the structure only needs layered construction from bottom to top, and is convenient to construct and low in engineering cost.
In summary, according to the ballastless track foundation bed structure, the strip-shaped foundation and the energy dissipation device are arranged, so that the foundation bed arch caused by expansion of expanded rock can be effectively prevented, the structure is only required to be constructed in a layered mode from bottom to top, the construction is convenient, and the construction cost is low.
Preferably, the number of the energy dissipation devices is at least two, the energy dissipation devices are arranged at intervals, and the strip foundation is arranged between every two adjacent energy dissipation devices.
A strip foundation can be arranged on the left side and the right side of the single-track railway respectively; for a double-track railway, two energy dissipation devices can be arranged, a strip foundation is arranged on two sides of each energy dissipation device, and the two energy dissipation devices share the strip foundation.
Preferably, all of said energy dissipaters are arranged horizontally.
Preferably, the strip foundation is integrally provided with the support plate.
Preferably, connecting steel bars are arranged between the strip-shaped foundation and the supporting plate support.
Preferably, the strip-shaped foundation is a structural member made of concrete.
Preferably, the support plate is a structural member made of reinforced concrete,
Preferably, the width of the strip-shaped foundation in the horizontal direction is greater than or equal to 30cm, the height of the strip-shaped foundation in the vertical direction is greater than or equal to 30cm, and the thickness of the supporting plate in the vertical direction is greater than or equal to 40cm.
Preferably, the width of the strip foundation in the horizontal direction is the same as the bed bottom surface.
Preferably, the bed comprises a bed surface layer and a bed bottom layer.
The invention also discloses a method for determining the width of the strip-shaped foundation in the ballastless track foundation bed structure, which comprises the following steps:
Measuring the expansion force f p and the allowable bearing force sigma 0 of the expanded rock;
calculating the gravity of the foundation bed;
Determining a maximum value of the strip-shaped base width b j according to the expansion force f p;
Determining a minimum value of the strip-shaped base width b j according to the allowable bearing capacity sigma 0;
The strip base width is selected according to the maximum value and the minimum value.
The method for determining the width of the strip-shaped foundation in the ballastless track foundation bed structure is used for determining the width of the strip-shaped foundation according to the fact that the expansion force of the expansion rock is smaller than the gravity borne by the upper portion of the expansion rock and the allowable bearing force of the expansion rock is larger than the bearing force of the actual expansion rock.
The method comprises the following specific steps:
Measuring the expansion force f p and the allowable bearing force sigma 0 of the expanded rock;
drawing up a strip-shaped base height h j, a support plate thickness h z, a support plate width B and a strip-shaped base number n;
Calculating the resultant force F of expansion forces applied to the bed p
Fp＝fp×bj×n；
Calculating the gravity of the foundation bed structure;
W0＝q1×b+q0×b0；
Wb＝γb×hb×B；
Wd＝γd×hd×B；
Wz＝γc×hz×B；
Wj＝γc×hj×bj×n；
Determining the value range of the strip-shaped basic width b j according to the expansion force of the expansion rock;
W0+Wb+Wd+Wz+Wj≥Fp
Determining the value range of the strip-shaped basic width b j according to the allowable bearing capacity of the expansive rock;
W0+Wb+Wd+Wz+Wj≤σ0×bj
comprehensively selecting a strip-shaped basic width b j;
wherein W 0 is the weight of the track structure, and the unit is: kN/m; q 1 is the track dead weight equipartition load, unit: kN/m 2; b is the width of the self-weight distribution of the track, and the unit is: m; q 0 is the uniform load among lines, unit: kN/m 2;b0 is the line-to-line load width in units of: m; w b is the dead weight of the surface layer, unit: kN/m; gamma b is the surface layer weight, unit: kN/m 3;hb is skin thickness, unit: m; b is the width of the support plate, unit: m;
w d is the self weight of the bottom layer, unit: kN/m; gamma d is underfill weight, unit: kN/m 3;Wz is the weight of the support plate, unit: kN/m; gamma c is the concrete weight, unit: kN/m 3;hz is the thickness of the support plate in units of: m; w j is the self weight of the strip foundation, unit: kN/m; h j is the bar base height, unit: m; b j is the basic width of the strip, unit: m.
In summary, the width of the strip foundation is determined according to the fact that the expansion force of the expansion rock is smaller than the gravity borne by the upper portion of the expansion rock and the allowable bearing force of the expansion rock is larger than the bearing force of the actual expansion rock, compared with the fact that deep energy dissipation holes and shallow energy dissipation holes are longitudinally and transversely arranged to eliminate the rising deformation, the strip foundation is clear in whole structure stress, simple to calculate, high in safety and stability, convenient to construct and low in engineering cost, and only needs layered construction from bottom to top.
Preferably, the value range of the strip-shaped basic width b j is determined according to the expansion force of the expansion rock:
Wherein b j is the basic width of the strip, unit: m; w 0 is the weight of the track structure, unit: kN/m; w b is the dead weight of the surface layer, unit: kN/m; w d is the self weight of the bottom layer, unit: kN/m; w z is the dead weight of the supporting plate, and the unit is: kN/m; w j is the self weight of the strip foundation, unit: kN/m 2;fp expansion force, units: KPa; gamma c is the concrete weight, unit: kN/m 3;hj is the bar base height, unit: m; n bar base number.
Preferably, the value range of the strip-shaped basic width b j is determined according to the allowable bearing capacity of the expansive rock;
Wherein b j is the basic width of the strip, unit: m; w 0 is the weight of the track structure, unit: kN/m; w b is the dead weight of the surface layer, unit: kN/m; w d is the self weight of the bottom layer, unit: kN/m; w z is the dead weight of the supporting plate, and the unit is: kN/m; w j is the self weight of the strip foundation, unit: kN/m 2; allowable bearing capacity σ 0, unit: KPa; gamma c is the concrete weight, unit: kN/m 3;hj is the bar base height, unit: m; n bar base number.
The invention also discloses a determining system for the strip-shaped base width, which comprises at least one processor and a memory in communication connection with at least one processor; the memory stores instructions executable by at least one of the processors to enable the at least one processor to perform a method of determining the width of the strip base.
The system for determining the width of the strip foundation can rapidly, accurately and conveniently operate the method, greatly saves labor cost and improves the accuracy of the operation method.
The application also discloses a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method of determining the width of a strip-shaped basis according to the application.
The computer readable storage medium can rapidly, accurately and conveniently operate the method for determining the width of the strip foundation, thereby greatly saving labor cost and improving the accuracy of the operation method.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. The ballastless track foundation bed structure is provided with the strip-shaped foundation and the energy dissipation device, so that the foundation bed arch caused by expansion of the expanded rock can be effectively prevented, the structure is only required to be constructed in a layered mode from bottom to top, the construction is convenient, and the construction cost is low.
2. According to the ballastless track foundation bed structure, the width of the strip foundation is determined according to the fact that the expansion force of the expansion rock is smaller than the gravity borne by the upper portion of the ballastless track foundation bed structure, and the allowable bearing force of the expansion rock is larger than the bearing force of the actual expansion rock.
3. The system for determining the width of the strip foundation can rapidly, accurately and conveniently operate the method, greatly saves labor cost and improves the accuracy of the operation method.
4. The computer readable storage medium can rapidly, accurately and conveniently operate the method for determining the width of the strip foundation, thereby greatly saving labor cost and improving the accuracy of the operation method.
Drawings
FIG. 1 is a cross-sectional view of a ballastless track bed structure of the present invention.
FIG. 2 is a flow chart of a method for determining the width of the strip foundation for use in the ballastless track bed structure of the present invention.
Fig. 3 is a schematic diagram of a system for determining the width of the strip-shaped base according to the present invention.
Icon: 1-an electronic device; 11-a processor; 12-memory; 13-input-output interface; 14-a power supply; 2-bed; 21-a foundation bed surface layer; 22-a base bed bottom layer; 3-supporting plates; 4-energy dissipation device; 5-bar foundation.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the ballastless track foundation bed structure of the embodiment comprises a foundation bed 2, and further comprises at least two strip-shaped foundations 5 arranged at horizontal intervals, wherein an energy dissipation device 4 is arranged between every two adjacent strip-shaped foundations 5, the energy dissipation device 4 is an elastic structural member, the top of each strip-shaped foundation 5 is connected with a supporting plate 3, and the top of each supporting plate 3 is connected with the foundation bed 2.
In a further preferred manner, the strip-shaped foundation 5 is a structural member made of concrete.
The strip foundation 5 may be prefabricated or cast-in-place concrete,
In particular, the support plate 3 is a structural member made of reinforced concrete,
The support plate 3 may be made of prefabricated or cast-in-situ reinforced concrete,
Specifically, the width of the strip-shaped foundation 5 in the horizontal direction is greater than or equal to 30cm, the height of the strip-shaped foundation 5 in the vertical direction is greater than or equal to 30cm, and the thickness of the support plate 3 in the vertical direction is greater than or equal to 40cm.
On the basis of the above, it is further preferable that the width of the strip-shaped foundation 5 in the horizontal direction is the same as the bottom surface of the bed 2.
When the ballastless track bed structure is used, all the strip-shaped foundations 5 and the energy dissipation devices 4 are arranged above the expansive rock cutting, the energy dissipation devices 4 are arranged between the strip-shaped foundations 5, the supporting plates 3 are arranged on the strip-shaped foundations 5, and the bed 2 is arranged on the supporting plates 3, because the energy dissipation devices 4 are elastic structural members, the expansion force generated by the expansive rock below the energy dissipation devices 4 is absorbed by the energy dissipation devices 4 and cannot be transmitted to the bed 2, the expansion force generated by the expansive rock below the strip-shaped foundations 4 is directly transmitted to the bed, the expansion force can be counteracted by the self-gravity of the strip-shaped foundations 4, the supporting plates 3 and the bed 2, the contact area between the bed 2 and the expansive rock mass is reduced, so that the expansion force of the bed 2 is effectively reduced, the effective expansion force exerted by the self-gravity of the bed 2 and the supporting plates 3 is counteracted, the aim of avoiding the arch on the bed caused by the expansion rock is achieved, and the arch on the bed can be effectively prevented.
And the structure only needs layered construction from bottom to top, and is convenient to construct and low in engineering cost.
The energy dissipation device 4 is made of elastic materials, compression deformation occurs under the action of expansion force to absorb the expansion force, and the expansion force can be recovered after the expansion force is eliminated.
In summary, according to the ballastless track foundation bed structure, the strip-shaped foundation 5 and the energy dissipation device 4 are arranged, so that the foundation bed arch caused by expansion of expanded rock can be effectively prevented, the structure is only required to be constructed in a layered mode from bottom to top, the construction is convenient, and the construction cost is low.
On the basis of the above, in a further preferred manner, the number of the energy dissipation devices 4 is at least two, and the energy dissipation devices 4 are arranged at intervals, and the strip-shaped foundation 5 is arranged between the adjacent energy dissipation devices 4.
For a single-track railway, a strip foundation 5 can be arranged on the left side and the right side respectively; for a double-track railway, two energy dissipation devices 4 can be arranged, a strip foundation 5 is arranged on two sides of each energy dissipation device 4, and one strip foundation 5 is shared between the two energy dissipation devices 4.
Preferably, all said dissipaters 4 are arranged horizontally.
In addition to the above, it is further preferable that the bar-shaped base 5 is integrally provided with the support plate 3.
Specifically, connecting steel bars are arranged between the strip-shaped foundation 5 and the supporting plate 3.
Example 2
As shown in fig. 2, the method for determining the width of the strip-shaped foundation in the ballastless track foundation bed structure according to the embodiment includes the following steps:
Measuring the expansion force f p and the allowable bearing force sigma 0 of the expanded rock;
The height h j of the strip-shaped foundation 5 and the number n of the strip-shaped foundations 5 are drawn;
Calculating the resultant force F p of expansion forces applied to the bed 2 and the gravity of the bed 2;
Determining a maximum value of the width b j of the strip-shaped base 5 from the expansion force f p;
Determining a minimum value of the width b j of the strip-shaped base 5 according to the allowable bearing capacity sigma 0;
The width of the strip foundation 5 is selected according to the maximum value of the width b j of the strip foundation 5 and the minimum value of the width b j of the strip foundation 5.
The method for determining the width of the strip foundation in the ballastless track foundation bed structure of the invention determines the width of the strip foundation 5 according to the fact that the expansion force of the expansion rock is smaller than the gravity borne by the upper part of the expansion rock and the allowable bearing force of the expansion rock is larger than the bearing force of the actual expansion rock
The method comprises the following specific steps:
Measuring the expansion force f p and the allowable bearing force sigma 0 of the expanded rock;
drawing up a strip-shaped base height h j, a support plate thickness h z, a support plate width B and a strip-shaped base number n;
Calculating the resultant force F of expansion forces applied to the bed p
Fp＝fp×bj×n；
Calculating the gravity of the foundation bed structure;
W0＝q1×b+q0×b0；
Wb＝γb×hb×B；
Wd＝γd×hd×B；
Wz＝γc×hz×B；
Wj＝γc×hj×bj×n；
Determining the value range of the strip-shaped basic width b j according to the expansion force of the expansion rock;
W0+Wb+Wd+Wz+Wj≥Fp
Determining the value range of the strip-shaped basic width b j according to the allowable bearing capacity of the expansive rock;
W0+Wb+Wd+Wz+Wj≤σ0×bj
comprehensively selecting a strip-shaped basic width b j;
Wherein W 0 is the weight of the track structure, and the unit is: kN/m; q 1 is the track dead weight equipartition load, unit: kN/m 2; b is the width of the self-weight distribution of the track, and the unit is: m; q 0 is the uniform load among lines, unit: kN/m 2;b0 is the line-to-line load width in units of: m; w b is the dead weight of the surface layer, unit: kN/m; gamma b is the surface layer weight, unit: kN/m 3;hb is skin thickness, unit: m; b is the width of the support plate, unit: m; w d is the self weight of the bottom layer, unit: kN/m; gamma d is underfill weight, unit: kN/m 3;Wz is the weight of the support plate, unit: kN/m; gamma c is the concrete weight, unit: kN/m 3;hz is the thickness of the support plate in units of: m; w j is the self weight of the strip foundation, unit: kN/m; h j is the bar base height, unit: m; b j is the basic width of the strip, unit: m. Wherein b j is the width of the strip foundation 5, unit: m; f p expansion force, unit: KPa; gamma c is the concrete weight, unit: kN/m 3;hj is the bar base height, unit: m; n bar base number. Allowable bearing capacity σ 0, unit: KPa.
The specific parameters encountered during construction are taken as examples:
The expansive force of the expansive rock cutting of a high-speed railway is 300kPa, the allowable bearing capacity of the expansive rock is 400kPa, the width of a road base surface is 13.6m, the thickness of a foundation bed surface layer is 0.4m, the thickness of a foundation bed bottom layer is 1m, the dead weight of a track is 13.7kN/m 2, the distribution width of the track is 3.1m, the load between lines is 2.3kN/m 2, the distribution width of the load between lines is 1.9m, the weight of the foundation bed surface layer and the underfilling is 20kN/m 3, and the weight of concrete is 25kN/m 3.
① The expansion force f p =300 kPa of the expanded rock and the allowable bearing force sigma 0 =400 kPa;
② Setting a bar-shaped foundation with the height h j =0.5m, the thickness h z =0.5m and the width B=13.6m of the support plate, and arranging a bar-shaped foundation on each of the left side, the middle side and the right side;
③ Calculating the resultant force F p of expansion forces applied to the bed
Fp＝3×fp×bj＝900bj；
④ Calculating the gravity of the foundation bed structure;
W0＝q1×b+q0×b0＝13.7×3.1+2.3×1.9＝46.84kN/m；
Wb＝γb×hb×B＝20×0.4×13.6＝108.8kN/m；
Wd＝γd×hd×B＝20×1.0×13.6＝272kN/m；
Wz＝γc×hz×B＝25×0.5×13.6＝170kN/m；
Wj＝γc×hj×bj×n＝25×0.5×bj×3＝37.5bj；
⑤ Determining the value range of the strip-shaped basic width b j according to the expansion force of the expansion rock;
⑥ Determining the value range of the strip-shaped basic width b j according to the allowable bearing capacity of the expansive rock;
⑦ The lowest position of the strip-shaped base width b j is selected to be 0 or 5, so that the field construction is more convenient, and the strip-shaped base width b j =0.55m is selected;
The beneficial effects of this embodiment are: according to the invention, the width of the strip foundation 5 is determined according to the fact that the expansion force of the expansion rock is smaller than the gravity borne by the upper part of the expansion rock and the allowable bearing force of the expansion rock is larger than the bearing force of the actual expansion rock, compared with the fact that deep energy dissipation holes and shallow energy dissipation holes are longitudinally and transversely arranged to eliminate the rising deformation, the whole structure is clear in stress and simple to calculate, the safety and stability performance of the structure are high, the structure only needs layered construction from bottom to top, the construction is convenient, and the engineering cost is low.
Example 3
As shown in fig. 3, a system for determining the width of the strip-shaped base according to the present embodiment, that is, an electronic device 1 (for example, a computer server with a program execution function) includes at least one processor 11, a power supply 14, and a memory 12 and an input-output interface 13 communicatively connected to the at least one processor 11; the memory 12 stores instructions executable by the at least one processor 11 to enable the at least one processor 11 to perform the method of any one of the preceding embodiments.
The input/output interface 13 may include a display, a keyboard, a mouse, and a USB interface for inputting/outputting data.
The power supply 14 is used for providing the electronic device 1 with electrical energy.
Those skilled in the art will appreciate that: all or part of the steps of implementing the above method embodiments may be implemented by hardware associated with program instructions, and the foregoing program may be stored in a computer readable storage medium, which when executed, performs steps including the above method embodiments.
And the aforementioned storage medium includes: a mobile storage device, a Read Only Memory (ROM), a magnetic disk or an optical disk, or the like, which can store program codes.
The above-described integrated units of the invention, when implemented in the form of software functional units and sold or used as stand-alone products, may also be stored in a computer-readable storage medium.
Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present invention.
And the aforementioned storage medium includes: various media capable of storing program codes, such as a removable storage device, a ROM, a magnetic disk, or an optical disk.
The beneficial effects of this embodiment are: the system for determining the width of the strip foundation can rapidly, accurately and conveniently operate the method, so that labor cost is greatly saved, and accuracy of the operation method is improved.
Example 4
A computer readable storage medium according to the present embodiment has stored thereon a computer program which, when executed by a processor, implements a method as disclosed in any of the foregoing embodiments of the application.
The beneficial effects of this embodiment are: the computer readable storage medium can rapidly, accurately and conveniently operate the method for determining the width of the strip foundation, thereby greatly saving labor cost and improving the accuracy of the operation method.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The method for determining the width of the strip-shaped foundation in the ballastless track foundation structure is characterized by comprising a foundation (2), and further comprising at least two strip-shaped foundations (5) which are horizontally arranged at intervals, wherein an energy dissipation device (4) is arranged between every two adjacent strip-shaped foundations (5), the energy dissipation device (4) is an elastic structural member, the top of each strip-shaped foundation (5) is connected with a supporting plate (3), and the top of each supporting plate (3) is connected with the foundation (2);
all the energy dissipation devices (4) are horizontally arranged;
the method comprises the following steps:
measuring the expansion force fp and the allowable bearing force sigma 0 of the expanded rock;
Calculating the gravity of the bed (2);
determining a maximum value of the width bj of the strip-shaped base (5) according to the expansion force f p;
determining a minimum value of the width bj of the strip-shaped base (5) according to the allowable bearing capacity sigma 0;
-selecting the width of the strip-shaped basis (5) according to the maximum and minimum values;
Determining the value range of the width bj of the strip-shaped foundation (5) according to the expansion force of the expansion rock:
Wherein bj is the basic width of the strip, and the unit is: m; w0 is the weight of the track structure, and the unit is: kN/m; wb is the dead weight of the surface layer, unit: kN/m; wd is the bottom layer dead weight, unit: kN/m; wz is the dead weight of the support plate, unit: kN/m; w j is the self weight of the strip foundation, unit: kN/m 2; f p expansion force, unit: KPa; gamma c is the concrete weight, unit: kN/m 3; h j is the bar base height, unit: m; n bar base number;
determining the value range of the strip-shaped basic width bj according to the allowable bearing capacity of the expanded rock;
Wherein bj is the basic width of the strip, and the unit is: m; w0 is the weight of the track structure, and the unit is: kN/m; wb is the dead weight of the surface layer, unit: kN/m; wd is the bottom layer dead weight, unit: kN/m; wz is the dead weight of the support plate, unit: kN/m; units: kN/m2; σ0 is the allowable load capacity in units: KPa; gamma c is the concrete weight, unit: kN/m 3; hj is the bar base height, unit: m; n bar base number.
2. The method for determining the width of the strip foundation in the ballastless track foundation bed structure according to claim 1, wherein the number of the energy dissipation devices (4) is at least two, the energy dissipation devices are arranged at intervals, and the strip foundation (5) is arranged between every two adjacent energy dissipation devices (4).
3. A method for determining the width of a strip foundation for use in a ballastless track bed structure according to claim 1, characterized in that the strip foundation (5) is provided integrally with the support plate (3).
4. A method for determining the width of a strip foundation for use in a ballastless track foundation bed structure according to claim 1, characterized in that the width of the strip foundation (5) in the horizontal direction is the same as the bottom surface of the foundation bed (2).
5. A determining system for the width of the strip base comprising at least one processor and a memory communicatively coupled to at least one of the processors; the memory stores instructions executable by at least one of the processors to enable the at least one processor to perform the method of determining the width of a bar base of any one of claims 1-4.
6. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements a method of determining the width of a strip-shaped basis as claimed in any one of claims 1-4.
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