CN117633990A - Mechanical method construction equipment type selection method for subway communication channel - Google Patents
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- 238000010276 construction Methods 0.000 title claims abstract description 79
- 238000004891 communication Methods 0.000 title claims abstract description 61
- 238000010297 mechanical methods and process Methods 0.000 title claims abstract description 20
- 238000010187 selection method Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 35
- 230000005641 tunneling Effects 0.000 claims abstract description 23
- 238000009933 burial Methods 0.000 claims abstract description 8
- 238000011002 quantification Methods 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims description 55
- 239000000463 material Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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Abstract
The invention relates to the technical field of subway communication channel mechanical method construction equipment, in particular to a subway communication channel mechanical method construction equipment model selection method, which comprises the following steps: s1, surveying and measuring to obtain stratum construction parameters, and obtaining main tunnel structure sizes and parameters and communication channel sizes and parameters; s2, determining a main tunnel structure safety judgment standard, and determining specific values of limit jacking force of the main tunnel in different construction modes; s3, determining the relation between the limit jacking force of the main tunnel and the tunneling length of the connecting channel; s4, calculating the change of the limit jacking force and the maximum tunneling length of the communication channel during construction in different stratum conditions, burial depths and different construction modes of the section size of the communication channel; s5, obtaining specific quantification standards of the mechanical construction equipment selection of the communication channel through the difference of the maximum tunneling lengths of the communication channels in different construction modes; the method obtains a specific equipment model selection method through analysis and calculation, and provides reference for mechanical construction of subway communication channels.
Description
Technical Field
The invention relates to the technical field of subway communication channel mechanical method construction equipment, in particular to a subway communication channel mechanical method construction equipment model selection method.
Background
The communication channel is used as an extremely important channel facility of the subway tunnel and plays a key role of a safe evacuation channel and an equipment connection channel between two single-line interval tunnels of the subway. The construction mode is mainly divided into a non-mechanical method and a mechanical method, and the mechanical method construction method of the connecting channel is popularized and applied rapidly along with the rapid improvement of the mechanical degree of tunnel construction, wherein the construction of the connecting channel jacking pipe method can effectively avoid various defects of the conventional frozen soil body combined with the mine method excavation construction, promotes the development of underground space and has the advantages of high mechanical degree, short construction period, good forming structure quality, safe and controllable operation environment and the like; however, at present, the relation research about the influence of the change of the top thrust load on the safety of the main tunnel structure in the process is mainly based on qualitative analysis of engineering experience, and a clear quantitative relation is lacking in the specific relation between the two under different working conditions. The patent document with the patent number of 202211733530.8 discloses a shield large longitudinal slope starting construction method, which comprises the following steps of performing engineering exploration, detecting geological conditions of a construction section, planning a design axis and determining the gradient of the large longitudinal slope of construction; selecting a shield mode according to the geological condition of the construction section; the equipment is selected based on qualitative analysis of engineering experience, and quantitative standards are lacked.
Disclosure of Invention
The invention provides a method for selecting the type of the mechanical construction equipment of the subway communication channel in order to solve the technical problems in the prior art.
In order to achieve the above purpose, the invention provides a method for selecting the type of construction equipment by a mechanical method of a subway communication channel, which comprises the following steps: the method comprises the following steps:
s1, surveying and measuring to obtain stratum construction parameters, and obtaining main tunnel structure sizes and parameters and communication channel sizes and parameters;
s2, determining a main tunnel structure safety judgment standard, and determining specific values of limit jacking force of the main tunnel in different construction modes;
s3, determining the relation between the limit jacking force of the main tunnel and the tunneling length of the connecting channel;
s4, calculating the change of the limit jacking force and the maximum tunneling length of the communication channel during construction in different stratum conditions, burial depths and different construction modes of the section size of the communication channel;
s5, obtaining specific quantification standards of the mechanical construction equipment selection of the communication channel through the difference of the maximum tunneling lengths of the communication channels in different construction modes.
Preferably, the construction mode is a shield method or a pipe jacking method.
Preferably, in step S1, the stratum construction parameters include: the main tunnel and the connecting channel are buried deep, the underground water level is high, the soil layer volume weights are different, the poisson ratio, the internal friction angle and the elastic modulus are different.
Preferably, in step S1, the main tunnel structure size and parameters include a main tunnel outer diameter, a main tunnel concrete segment material parameter, a main tunnel steel-concrete structure segment material parameter, a main tunnel segment width and thickness, a main tunnel segment assembling mode, and a segment bolt selecting model.
Preferably, in step S1, the communication channel dimensions and parameters include communication channel outer diameter, communication channel segment width and thickness, and communication channel segment material parameters.
Preferably, in step S2, the radial deformation, dislocation, seam expansion, main tunnel axial force, bending moment and bolt stress of the main tunnel are determined as the main tunnel structure safety judgment standards.
Preferably, in step S3, a pipe jacking method is adopted for construction, and the relation between the limit jacking force of the main tunnel and the tunneling length of the connecting channel is determined as formula 1:
in formula 1:
p is the top force; f is the friction coefficient between the surface of the pipeline and the soil layer around the pipeline when jacking; gamma is the unit weight of the soil layer where the pipeline is positioned, and the unit is kN/m 3 ；D 1 The outer diameter of the pipeline is the unit m; h is the thickness of the covering soil layer above the top of the pipeline; omega is the weight of the pipeline per unit length and the unit kN/m; l is the length of the pipeline, and the unit is m; p (P) F When jacking, the head-on resistance of the heading machine; when the soil pressure balances the jacking pipe,P C to control the soil pressure, taking the passive soil pressure at the center of the front end of the segment;phi is the internal friction angle of the soil layer where the pipeline is positioned.
Preferably, in step S3, a shield method is adopted for construction, and the relation between the limit thrust of the main tunnel and the tunneling length of the connecting channel is determined as formula 2:
in formula 2:
f is the jacking force, and F is the friction coefficient between the surface of the pipeline and the soil layer around the pipeline when jacking; gamma is the volume weight of the soil layer where the pipeline is positioned; d (D) 1 Is the outer diameter of the pipeline; h is the thickness of the covering soil layer above the top of the pipeline;phi is the internal friction angle of the soil layer where the pipeline is positioned; l is the length of the pipeline; w is the weight of a main machine of the shield machine and is in kg; d (D) 1 Is the outer diameter of the pipeline; p (P) 0 The lateral water and soil pressure of the soil layer; ΔP 2 Additional stress caused by soil extrusion of the cutter head panel; p (P) t The pressure of the soil bin; e is the void ratio;mu is the poisson ratio of soil; l is the length of the soil bin; and xi is the cutter head opening ratio.
Preferably, in step S4, different formation conditions select a sand, clay, and sand clay composite formation; the different burial depths are selected to be 15m,20m and 25m; the cross-sectional dimensions of the different communication channels were selected to be 3.26m,3.65m,3.80m.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that: according to the method for selecting the type of the subway communication channel mechanical method construction equipment, various stratum parameters are obtained through investigation and measurement, and the main tunnel structure size and parameters and the communication channel size and parameters are obtained; determining a main tunnel structure safety judgment standard and determining a calculation method of main tunnel limit jacking force under different construction modes; determining the relation between the limit thrust of the main tunnel and the tunneling length of the connecting channel; calculating the variation of limit jacking force and the maximum tunneling length of the communication channel during construction in different stratum conditions, burial depths and different construction modes of the section size of the communication channel; and obtaining specific quantification standards of the mechanical construction equipment selection of the communication channel through the difference of the maximum tunneling lengths of the communication channels in different construction modes. The method is used for solving the problems that the existing subway communication channel mechanical method construction equipment model selection based on experience and lacking in quantification standard is mainly used for determining the flow, and the specific relation between the existing subway communication channel mechanical method construction equipment model selection and the existing subway communication channel mechanical method construction equipment model selection based on experience and lacking in quantification standard is lack of clear quantification relation under different working conditions, and the specific reliable equipment model selection method is obtained through software analysis and calculation, so that reference is provided for subsequent subway communication channel mechanical method construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart diagram of a method for selecting the type of construction equipment of a mechanical method of a subway communication channel;
fig. 2 is a table diagram of a decision criterion used in the method for selecting the type of the subway interconnecting channel mechanical construction equipment provided by the invention;
fig. 3 is a block diagram of a security decision flow of a main tunnel structure of a type selection method of a subway contact channel mechanical construction device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators such as first, second, up, down, left, right, front, and rear … … are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture as shown in the drawings, and if the particular posture is changed, the directional indicator is changed accordingly.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
The invention provides a method for selecting the type of construction equipment of a subway communication channel mechanical method, which is shown in fig. 1-3 and comprises the following steps:
s1, surveying and measuring to obtain stratum construction parameters, and obtaining main tunnel structure sizes and parameters and communication channel sizes and parameters;
s2, determining a main tunnel structure safety judgment standard, and determining specific values of limit jacking force of the main tunnel in different construction modes;
s3, determining the relation between the limit jacking force of the main tunnel and the tunneling length of the connecting channel;
s4, establishing a numerical model by using finite element software, and calculating the change of limit thrust and the maximum tunneling length of the communication channel during construction in different construction modes of different stratum conditions, burial depths and cross section sizes of the communication channel;
s5, obtaining specific quantification standards of the mechanical construction equipment selection of the communication channel through the difference of the maximum tunneling lengths of the communication channels in different construction modes.
Preferably, the construction mode is a shield method or a pipe jacking method.
Preferably, in step S1, the stratum construction parameters include: the main tunnel and the connecting channel are buried deep, the underground water level is high, the soil layer volume weights are different, the poisson ratio, the internal friction angle and the elastic modulus are different.
Preferably, in step S1, the main tunnel structure size and parameters include a main tunnel outer diameter, a main tunnel concrete segment material parameter, a main tunnel steel-concrete structure segment material parameter, a main tunnel segment width and thickness, a main tunnel segment assembling mode, and a segment bolt selecting model.
Preferably, in step S1, the communication channel dimensions and parameters include communication channel outer diameter, communication channel segment width and thickness, and communication channel segment material parameters.
Preferably, in step S2, the radial deformation, dislocation, seam opening, main tunnel axial force, bending moment and bolt stress of the main tunnel are determined as the main tunnel structure safety determination criteria according to the subway design specification, the concrete structure design specification, and the like. Wherein the main tunnel axial force and bending moment have the following formula 3:
N t ＝α 1 f c bχ b
M t ＝N t e 0
e 0 ＝e i -e a
wherein: mt is the limit value of the bending moment of the main tunnel segment, nt is the limit value of the axial force of the main tunnel segment, e 0 For the eccentricity of the axial force to the centroid of the section, the value 129.91mm, e was calculated i For initial eccentricity, h is the section height, a s For the vertical distance from the resultant force point of the tension steel bar to the tension edge of the section, f y Designed value of yield strength of tension steel bar, A s For the area of the tensile steel bar, h 0 Is the effective height of the section. Mt= 664.089kn·m is calculated by substituting each parameter.
And taking the value according to the parameters, wherein the Nt= -5135.130kN and Mt= 664.089 kN.m of the main tunnel segment. The yield strength of the bolt is 640MPa.
Preferably, in step S3, a pipe jacking method is adopted for construction, and the relation between the limit jacking force of the main tunnel and the tunneling length of the connecting channel is determined as formula 1:
in formula 1:
p is the top force; f is the friction coefficient between the surface of the pipeline and the soil layer around the pipeline when jacking; gamma is the unit weight of the soil layer where the pipeline is positioned, and the unit is kN/m 3 ；D 1 The outer diameter of the pipeline is the unit m; h is the thickness of the covering soil layer above the top of the pipeline; omega is the weight of the pipeline per unit length and the unit kN/m; l is the length of the pipeline, and the unit is m; p (P) F When jacking, the head-on resistance of the heading machine; when the soil pressure balances the jacking pipe,P C to control the soil pressure, taking the passive soil pressure at the center of the front end of the segment;phi is the internal friction angle of the soil layer where the pipeline is positioned. The 9700kN obtained through software analysis is regarded as that the pipe piece can not bear larger pushing force due to the crack, namely Pmax=9700 kN in the situation is substituted into a formula to obtain the limit tunneling length of the pipe jacking method of 16.64m.
Preferably, in step S3, a shield method is adopted for construction, and the relation between the limit thrust of the main tunnel and the tunneling length of the connecting channel is determined as formula 2:
in formula 2:
f is the jacking force, and F is the friction coefficient between the surface of the pipeline and the soil layer around the pipeline when jacking; gamma is the volume weight of the soil layer where the pipeline is positioned; d (D) 1 Is the outer diameter of the pipeline; h is the thickness of the covering soil layer above the top of the pipeline;phi is the internal friction angle of the soil layer where the pipeline is positioned; l is the length of the pipeline; w is the weight of a main machine of the shield machine and is in kg; d (D) 1 Is the outer diameter of the pipeline; p (P) 0 The lateral water and soil pressure of the soil layer; ΔP 2 Additional stress caused by soil extrusion of the cutter head panel; p (P) t The pressure of the soil bin; e is the void ratio;mu is the poisson ratio of soil; l is the length of the soil bin; and xi is the cutter head opening ratio.
Preferably, in step S4, different formation conditions select a sand, clay, and sand clay composite formation; the different burial depths are selected to be 15m,20m and 25m; the cross-section sizes of different communication channels are 3.26m,3.65m and 3.80m, and the calculation steps are the same as the above. For example, the buried depth is 15m, the stratum condition is sand, the maximum jacking force of the jacking pipe method construction under the condition that the section size of a connecting channel is 3.26m cannot exceed 9700kN, and the maximum jacking force is substituted into a formula to obtain the limit tunneling length of the jacking pipe method of 16.64m.
As shown in fig. 3, after determining the parameters required by the decision criteria and the connection channel model selection, the decision criteria are numbered i, i=1, 2, 3.
It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and is for enabling those skilled in the art to understand the present invention and implement it accordingly, but the present invention is not limited to the above-described specific embodiments. All changes or modifications that come within the scope of the appended claims are intended to be embraced therein.
Claims (9)
1. The mechanical construction equipment type selection method for the subway communication channel is characterized by comprising the following steps of:
s1, surveying and measuring to obtain stratum construction parameters, and obtaining main tunnel structure sizes and parameters and communication channel sizes and parameters;
s2, determining a main tunnel structure safety judgment standard, and determining specific values of limit jacking force of the main tunnel in different construction modes;
s3, determining the relation between the limit jacking force of the main tunnel and the tunneling length of the connecting channel;
s4, calculating the change of the limit jacking force and the maximum tunneling length of the communication channel during construction in different stratum conditions, burial depths and different construction modes of the section size of the communication channel;
s5, obtaining specific quantification standards of the mechanical construction equipment selection of the communication channel through the difference of the maximum tunneling lengths of the communication channels in different construction modes.
2. The method for selecting the type of the construction equipment for the mechanical method of the subway communication channel according to claim 1, wherein the construction mode is a shield method or a pipe jacking method.
3. The method for selecting the type of the mechanical construction equipment for the subway interconnecting passage according to claim 1 or 2, wherein in the step S1, the stratum construction parameters include: the main tunnel and the connecting channel are buried deep, the underground water level is high, the soil layer volume weights are different, the poisson ratio, the internal friction angle and the elastic modulus are different.
4. The method for selecting the type of the subway interconnecting channel mechanical construction equipment according to claim 3, wherein in the step S1, the main tunnel structure size and parameters comprise the main tunnel outer diameter, the main tunnel concrete segment material parameters, the main tunnel steel-concrete structure segment material parameters, the main tunnel segment width and thickness, the main tunnel segment assembling mode and the segment bolt selecting type.
5. The method for selecting the type of the construction equipment for the mechanical method of the subway interconnecting channel according to claim 4, wherein in the step S1, the size and the parameters of the interconnecting channel comprise the outer diameter of the interconnecting channel, the width and the thickness of the interconnecting channel segment and the material parameters of the interconnecting channel segment.
6. The method for selecting the type of the mechanical construction equipment of the subway communication channel according to claim 1, wherein in the step S2, the radial deformation amount, the dislocation, the seam opening amount, the main tunnel axial force, the bending moment and the bolt stress of the main tunnel are determined as the main tunnel structure safety judgment standard.
7. The method for selecting the type of the subway communication channel mechanical method construction equipment according to claim 1, wherein in the step S3, the pipe jacking method is adopted for construction, and the relation between the limit jacking force of the main tunnel and the tunneling length of the communication channel is determined as formula 1:
in formula 1:
p is the top force; f is the friction coefficient between the surface of the pipeline and the soil layer around the pipeline when jacking; gamma is the unit weight of the soil layer where the pipeline is positioned, and the unit is kN/m 3 ；D 1 The outer diameter of the pipeline is the unit m; h is the thickness of the covering soil layer above the top of the pipeline; omega is the weight of the pipeline per unit length and the unit kN/m; l is the length of the pipeline, and the unit is m; p (P) F When jacking, the head-on resistance of the heading machine; when the soil pressure balances the jacking pipe,P C to control the soil pressure, taking the passive soil pressure at the center of the front end of the segment;phi is the internal friction angle of the soil layer where the pipeline is positioned.
8. The method for selecting the type of the mechanical construction equipment for the subway communication channel according to claim 1, wherein in the step S3, the shield method is adopted for construction, and the relation between the limit top thrust of the main tunnel and the tunneling length of the communication channel is determined as formula 2:
in formula 2:
f is the jacking force, and F is the friction coefficient between the surface of the pipeline and the soil layer around the pipeline when jacking; gamma is the volume weight of the soil layer where the pipeline is positioned; d (D) 1 Is the outer diameter of the pipeline; h is the pipeline roofThe thickness of the covering soil layer above the part;phi is the internal friction angle of the soil layer where the pipeline is positioned; l is the length of the pipeline; w is the weight of a main machine of the shield machine and is in kg; d (D) 1 Is the outer diameter of the pipeline; p (P) 0 The lateral water and soil pressure of the soil layer; ΔP 2 Additional stress caused by soil extrusion of the cutter head panel; p (P) t The pressure of the soil bin; e is the void ratio;mu is the poisson ratio of soil; l is the length of the soil bin; and xi is the cutter head opening ratio.
9. The method for selecting the model of the mechanical construction equipment of the subway communication channel according to claim 1, wherein in the step S4, sand, clay and sand clay composite stratum are selected according to different stratum conditions; the different burial depths are selected to be 15m,20m and 25m; the cross-sectional dimensions of the different communication channels were selected to be 3.26m,3.65m,3.80m.
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