CN106285716A - The scheme comparison of shield tunnel loop partitioned mode analyzes method - Google Patents

Abstract

The scheme comparison that the invention discloses a kind of shield tunnel loop partitioned mode analyzes method, and it comprises steps of determining that the section of jurisdiction ring central angle that each longitudinal seam joint position of the first section of jurisdiction ring is corresponding_i, numbering i and longitudinal seam joint bending rigidity K corresponding to i-th longitudinal seam joint_i；Determine the above-mentioned parameter of the second section of jurisdiction ring adjacent with the first section of jurisdiction ring；The absolute value M of the moment of flexure of homogenizing annulus position corresponding to either connector is calculated in two endless tube sheets with homogeneous ring method_i；Calculate the actual moment of flexure that joint bears；Calculate the first section of jurisdiction ring of the segment partition scheme of various erection method and the corner sum of all longitudinal seam joints of the second section of jurisdiction ring；The scheme of all longitudinal seam joint corner sums minimum choosing wherein two endless tube sheets is optimum segment partition scheme.The method using the present invention only needs the relevant mechanics parameter of Longitudinal Joint between Segments joint when being analyzed, scheme can be made relevant evaluation, motivated, and methodological science is reasonable, easy to use, time saving and energy saving.

Description

The scheme comparison of shield tunnel loop partitioned mode analyzes method

Technical field

The present invention relates to shield tunnel field, particularly to the side of a kind of shield tunnel loop partitioned mode Case ratio selects analysis method.

Background technology

Now there are some researches show, during shield tunnel transversely deforming, longitudinal seam joint is the weakest position, And section of jurisdiction principal section occurs damaged situation seldom to occur, therefore, reduce Longitudinal Joint between Segments to greatest extent to connect The moment of flexure that head is born is one of measure improving segment damage " short slab ".

Existing in the analysis of section of jurisdiction ring partitioned mode, after several segment partition schemes determined, then use relevant Computation model, tunnel segment structure internal force and deformation to various schemes carry out analytical calculation, enter result of calculation Row comparative analysis, finally proposes the design of optimum.Adopt when being analyzed in this way, workload Greatly, and its essential problem is indefinite, i.e. needs to reduce all longitudinal seam joints of section of jurisdiction ring to greatest extent and is held The moment of flexure being subject to.

Summary of the invention

The technical problem to be solved in the present invention is that the workload in order to overcome existing analysis method to exist is big, divides Analysis method needs the indefinite defect of essential problem solved, it is provided that a kind of shield tunnel loop piecemeal side The scheme comparison of formula analyzes method.

The present invention is to solve above-mentioned technical problem by following technical proposals:

The scheme comparison of a kind of shield tunnel loop partitioned mode analyzes method, and its feature is, piecemeal Choosing continuous print two endless tube sheet during the scheme comparison of mode to be analyzed, it comprises the following steps:

Step 1, with starting point for section of jurisdiction ring central angle directly over the first section of jurisdiction ring, the section of jurisdiction ring of this position The number of degrees of central angle are 0 degree；The number of degrees of section of jurisdiction ring central angle increase in a clockwise direction；If the first section of jurisdiction Ring has n longitudinal seam joint, and longitudinal seam joint is numbered from the section of jurisdiction ring central angle moderate corresponding to each longitudinal seam joint The longitudinal seam joint of the section of jurisdiction ring central angle that number is minimum starts, and represents the i-th longitudinal joint of the first section of jurisdiction ring with i The numbering of joint, wherein 1≤i≤n, withRepresent corresponding to the i-th longitudinal seam joint of the first section of jurisdiction ring Section of jurisdiction ring central angle, with K_iRepresent the longitudinal seam joint bending rigidity corresponding to i-th longitudinal seam joint；

Step 2 adjacent with the first section of jurisdiction ring for the second section of jurisdiction ring, the partitioned mode of the second section of jurisdiction ring with First section of jurisdiction ring is identical, the starting point being section of jurisdiction ring central angle with the surface of the second section of jurisdiction ring, this position The number of degrees of section of jurisdiction ring central angle are 0 degree；The number of degrees of section of jurisdiction ring central angle increase in a clockwise direction；With One section of jurisdiction ring is identical, and the second section of jurisdiction ring also has n longitudinal seam joint, and longitudinal seam joint is numbered from each longitudinal seam joint In corresponding section of jurisdiction ring central angle, the longitudinal seam joint of the section of jurisdiction ring central angle that the number of degrees are minimum starts, with n+i Represent the numbering of the second section of jurisdiction ring i-th longitudinal seam joint, wherein 1≤i≤n, withRepresent the second section of jurisdiction The section of jurisdiction ring central angle corresponding to i-th longitudinal seam joint of ring, with K_n+iRepresent the i-th of the second section of jurisdiction ring Longitudinal seam joint bending rigidity corresponding to individual longitudinal seam joint；When shield tunnel uses through seam assembling, And K_i=K_n+i；When shield tunnel uses staggered joint erection,And K_i≠K_n+i；

Step 3, the design load born according to shield tunnel, do not consider the longitudinal seam joint of section of jurisdiction ring Impact, will section of jurisdiction ring as the homogenizing annulus without longitudinal seam joint, be calculated this homogenizing annulus along ring Moment of flexure to distribution；If ring central angle in section of jurisdiction is on homogenizing annulusThe absolute value M of place's moment of flexure_i, homogenizing On annulus, ring central angle in section of jurisdiction isThe absolute value M of place's moment of flexure_n+i；

Step 4, set the moment of flexure increase rate of section of jurisdiction ring as ξ, the then longitudinal seam joint of the first numbered i of section of jurisdiction ring The moment of flexure born is (1-ξ) × M_i, the moment of flexure that the longitudinal seam joint of the second numbered n+i of section of jurisdiction ring bears is (1-ξ)×M_n+i；

Step 5, it is provided with f kind section of jurisdiction ring segment partition scheme, the numbered j of the segment partition scheme of section of jurisdiction ring, wherein 1≤j≤f, it may be assumed that

Each longitudinal seam joint in the first section of jurisdiction ring in j scheme Moment on corresponding homogenizing annulus Under corner sum be:

${\mathrm{\θ}}_{j1}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{M_{\mathrm{ji}}(1-\mathrm{\ξ})}{K_{\mathrm{ji}}};$

Under each longitudinal seam joint of the second section of jurisdiction ring in j scheme Moment on corresponding homogenizing annulus Corner sum be:

${\mathrm{\θ}}_{j2}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{M_{j(n+i)}(1-\mathrm{\ξ})}{K_{j(n+i)}};$

Then under the first section of jurisdiction ring in j scheme and the second section of jurisdiction ring Moment on corresponding homogenizing annulus The corner sum of all longitudinal seam joints be:

${\mathrm{\θ}}_j={\mathrm{\θ}}_{j1}+{\mathrm{\θ}}_{j2}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{M_{\mathrm{ji}}(1-\mathrm{\ξ})}{K_{\mathrm{ji}}}+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{M_{j(n+i)}(1-\mathrm{\ξ})}{K_{j(n+i)}};$

In above-mentioned formula, subscript j of each symbol represents the relevant parameter in scheme j, wherein, θ_j1For j The corner sum of each longitudinal seam joint in the first section of jurisdiction ring in scheme；M_ji(1-ξ) is in j scheme The moment of flexure that one section of jurisdiction ring i longitudinal seam joint bears, its numerical value is drawn by step 4；K_jiFor in j scheme The longitudinal seam joint bending rigidity that one section of jurisdiction ring i longitudinal seam joint is corresponding；θ_j2For the second section of jurisdiction ring in j scheme In the corner sum of each longitudinal seam joint；M_j(n+i)(1-ξ) is that in j scheme, the second section of jurisdiction ring is numbered The moment of flexure that the longitudinal seam joint of n+i bears, its numerical value is drawn by step 4；K_j(n+i)For the second pipe in j scheme The longitudinal seam joint bending rigidity that the longitudinal seam joint of the numbered n+i of loop is corresponding；

Step 6, in the segment partition scheme of f kind section of jurisdiction ring, each scheme can be obtained successively according to step 5 The first section of jurisdiction ring and the corner sum of the second section of jurisdiction ring be θ_j, i.e. it is followed successively by θ₁, θ₂... θ_f；If γ For wherein minimum angle, i.e. γ=Min (θ₁, θ₂... θ_f), then with the first section of jurisdiction ring and the second section of jurisdiction The corner sum of ring be the section of jurisdiction ring segment partition scheme corresponding to γ be the optimum in the ring segment partition scheme of f kind section of jurisdiction Section of jurisdiction ring segment partition scheme.

It is preferred that when shield tunnel uses staggered joint erection, 0 < ξ < 1 in step 4.

It is preferred that when shield tunnel uses through seam assembling, ξ=0 in step 4.

It is preferred that in described step 6, when the corner sum of the first section of jurisdiction ring and the second section of jurisdiction ring is γ institute When corresponding section of jurisdiction ring segment partition scheme has two kinds, then with the first section of jurisdiction ring and the second section of jurisdiction in this two schemes The scheme of the variance minimum of each longitudinal seam joint corner of ring is as optimum section of jurisdiction ring segment partition scheme.

The most progressive effect of the present invention is: the inventive method is applicable to duct pieces of shield tunnel partitioned mode Optimizing and select project, and the through seam assembling section of jurisdiction ring of the shield tunnel being applicable to and staggered joint erection section of jurisdiction ring Partitioned mode evaluation analysis, only need the relevant mechanics parameter of Longitudinal Joint between Segments joint during analysis, can be right Scheme makes relevant evaluation, motivated, and methodological science is reasonable, easy to use, time saving and energy saving.

Accompanying drawing explanation

Fig. 1 is the structural representation of the shield tunnel loop of present pre-ferred embodiments.

Detailed description of the invention

Name preferred embodiment, and combine accompanying drawing and become apparent from intactly illustrating the present invention.

Embodiment 1

As it is shown in figure 1, shield tunnel loop includes bind block section of jurisdiction 2 and the multiple non-block pipe that binds Sheet 3, bind block section of jurisdiction 2 and multiple non-bind connect between block section of jurisdiction 3 one annular, block section of jurisdiction of binding And non-bind between block section of jurisdiction, non-binding all is connected by longitudinal seam joint 1 between block section of jurisdiction.Longitudinal seam joint 1 also includes that bolt 4 and nut 5, bolt 4 and nut 5 complement one another.

The erection method that straight joint connects, the most adjacent section of jurisdiction ring knot can be used between shield tunnel loop Structure is identical, and in adjacent tubes loop, the position of the longitudinal seam joint of previous section of jurisdiction ring and later section of jurisdiction ring The position of longitudinal seam joint identical.

Now, it is not necessary to adjacent section of jurisdiction ring is made a distinction, it is only necessary to calculate a section of jurisdiction ring.Use straight joint Moment of flexure increase rate ξ=0 during connection, at longitudinal seam joint.

When taking straight joint to connect between the ring of section of jurisdiction, the scheme comparison analysis of shield tunnel loop partitioned mode Method, it comprises the following steps:

Step 1 is as it is shown in figure 1, with starting point for section of jurisdiction ring central angle directly over the ring of section of jurisdiction, this position The number of degrees of section of jurisdiction ring central angle be 0 degree；The number of degrees of section of jurisdiction ring central angle increase in a clockwise direction；From 0 ° of position dextrorotation turn 90 degrees, and the section of jurisdiction ring central angle of this position is 90 °；Clockwise from 0 ° of position Roll tube loop 180 degree, the section of jurisdiction ring central angle of this position is 180 °；Turn clockwise from 0 ° of position 270 degree, the section of jurisdiction ring central angle of this position is 270 °.If section of jurisdiction ring has n longitudinal seam joint, longitudinal joint connects The head numbering section of jurisdiction ring central angle that the number of degrees are minimum from the section of jurisdiction ring central angle corresponding to each longitudinal seam joint Longitudinal seam joint starts, and represents the numbering of the i-th longitudinal seam joint of section of jurisdiction ring, wherein 1≤i≤n with i, withRepresent the section of jurisdiction ring central angle corresponding to i-th longitudinal seam joint of section of jurisdiction ring, with K_iRepresent i-th to indulge Sew up the longitudinal seam joint bending rigidity corresponding to head；

Step 2, the design load born according to shield tunnel, do not consider the longitudinal seam joint of section of jurisdiction ring Impact, will section of jurisdiction ring as the homogenizing annulus without longitudinal seam joint, be calculated this homogenizing annulus along ring Moment of flexure to distribution；If ring central angle in section of jurisdiction is on homogenizing annulusThe absolute value M of place's moment of flexure_i。

Step 3, it is provided with c kind section of jurisdiction ring segment partition scheme, the numbered j of the segment partition scheme of section of jurisdiction ring, wherein 1≤j≤c, it may be assumed that

Under each longitudinal seam joint in the ring of section of jurisdiction in j scheme Moment on corresponding homogenizing annulus Corner sum is:

${\mathrm{\&theta;}}_j=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{\left|M_{\mathrm{ji}}\right|}{K_{\mathrm{ji}}};$

In above-mentioned formula, θ_jCorner sum for each longitudinal seam joint in section of jurisdiction ring in j scheme；M_ji The moment of flexure born for ring i longitudinal seam joint in section of jurisdiction in j scheme, its numerical value is drawn by step 2；K_jiFor j The longitudinal seam joint bending rigidity that in scheme, ring i longitudinal seam joint in section of jurisdiction is corresponding；

Step 4, in the segment partition scheme of c kind erection method, according to the available θ of step 3_j? Number is c, if α is wherein minimum angle, i.e. and α=Min (θ₁, θ₂... θ_c), then corresponding with α Scheme as the optimum section of jurisdiction ring segment partition scheme in c kind scheme；When the scheme that α is corresponding has two kinds, The i.e. corner sum of this two schemes is identical, then with the side of each longitudinal seam joint corner in this two schemes The scheme of difference minimum is as optimum section of jurisdiction ring segment partition scheme.

The method of the present embodiment is applicable to the through seam assembling section of jurisdiction ring of shield tunnel, only needs section of jurisdiction during analysis The relevant mechanics parameter of longitudinal seam joint, can make relevant evaluation to scheme, motivated, methodological science Rationally, easy to use, time saving and energy saving.

Embodiment 2

Shield tunnel loop is as it is shown in figure 1, just repeat no more at this.

Erection method between shield tunnel loop is that the fissure of displacement connects, the i.e. first section of jurisdiction ring and the second section of jurisdiction The structure of ring is identical, and the longitudinal seam joint of the position of the longitudinal seam joint of the first section of jurisdiction ring and the second section of jurisdiction ring Mutually stagger in position.

When taking the fissure of displacement to connect between the ring of section of jurisdiction, the scheme comparison analysis of shield tunnel loop partitioned mode Method, it comprises the following steps:

Step 1, with the starting point of section of jurisdiction ring central angle for this section of jurisdiction ring directly over the first section of jurisdiction ring, this position The number of degrees of the section of jurisdiction ring central angle put are 0 degree；The number of degrees of section of jurisdiction ring central angle increase in a clockwise direction； If the first section of jurisdiction ring has n longitudinal seam joint, longitudinal seam joint is numbered from the section of jurisdiction ring corresponding to each longitudinal seam joint In central angle, the longitudinal seam joint of the section of jurisdiction ring central angle that the number of degrees are minimum starts, and represents the first section of jurisdiction ring with i The numbering of i-th longitudinal seam joint, wherein 1≤i≤n, withThe i-th longitudinal joint representing the first section of jurisdiction ring connects Section of jurisdiction ring central angle corresponding to Tou, with K_iRepresent the longitudinal seam joint bending resistance corresponding to i-th longitudinal seam joint Rigidity；

Step 2 adjacent with the first section of jurisdiction ring for the second section of jurisdiction ring, the partitioned mode of the second section of jurisdiction ring with First section of jurisdiction ring is identical, rising with the section of jurisdiction ring central angle that surface is this section of jurisdiction ring of the second section of jurisdiction ring Point, the number of degrees of the section of jurisdiction ring central angle of this position are 0 degree；The number of degrees of section of jurisdiction ring central angle are with side clockwise To increase；Identical with the first section of jurisdiction ring, the second section of jurisdiction ring also has n longitudinal seam joint, and longitudinal seam joint is numbered From the section of jurisdiction ring central angle corresponding to each longitudinal seam joint, the longitudinal joint of the section of jurisdiction ring central angle that the number of degrees are minimum connects Head starts, and represents the numbering of the second section of jurisdiction ring i-th longitudinal seam joint with n+i, wherein 1≤i≤n, with Represent the section of jurisdiction ring central angle corresponding to i-th longitudinal seam joint of the second section of jurisdiction ring, with K_n+iRepresent second The longitudinal seam joint bending rigidity corresponding to i-th longitudinal seam joint of section of jurisdiction ring；

Step 3, the design load born according to shield tunnel, do not consider the longitudinal seam joint of section of jurisdiction ring Impact, will section of jurisdiction ring as the homogenizing annulus without longitudinal seam joint, be calculated this homogenizing annulus along ring Moment of flexure to distribution；If ring central angle in section of jurisdiction is on homogenizing annulusThe absolute value M of place's moment of flexure_i, section of jurisdiction Ring central angle isThe absolute value M of place's moment of flexure_n+i；

Step 4, set the moment of flexure increase rate of section of jurisdiction ring as ξ, the then longitudinal seam joint of the first numbered i of section of jurisdiction ring The moment of flexure born is (1-ξ) × M_i, the moment of flexure that the longitudinal seam joint of the second numbered n+i of section of jurisdiction ring bears is (1-ξ)×M_n+i；

Step 5, it is provided with d kind section of jurisdiction ring segment partition scheme, the numbered j of the segment partition scheme of section of jurisdiction ring, wherein 1≤j≤d, it may be assumed that

Each longitudinal seam joint in the first section of jurisdiction ring in j scheme Moment on corresponding homogenizing annulus Under corner sum be:

${\mathrm{\&theta;}}_{j1}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{\mathrm{ji}}(1-\mathrm{\&xi;})}{K_{\mathrm{ji}}};$

Under each longitudinal seam joint of the second section of jurisdiction ring in j scheme Moment on corresponding homogenizing annulus Corner sum be:

${\mathrm{\&theta;}}_{j2}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{j(n+i)}(1-\mathrm{\&xi;})}{K_{j(n+i)}};$

Then under the first section of jurisdiction ring in j scheme and the second section of jurisdiction ring Moment on corresponding homogenizing annulus The corner sum of all longitudinal seam joints be:

${\mathrm{\&theta;}}_j={\mathrm{\&theta;}}_{j1}+{\mathrm{\&theta;}}_{j2}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{\mathrm{ji}}(1-\mathrm{\&xi;})}{K_{\mathrm{ji}}}+\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{j(n+i)}(1-\mathrm{\&xi;})}{K_{j(n+i)}};$

In above-mentioned formula, θ_j1Corner sum for each longitudinal seam joint in the first section of jurisdiction ring in j scheme； M_ji(1-ξ) is the moment of flexure that in j scheme, the first section of jurisdiction ring i longitudinal seam joint bears, and its numerical value is by step 4 Draw；K_jiFor the longitudinal seam joint bending rigidity that the first section of jurisdiction ring i longitudinal seam joint in j scheme is corresponding；θ_j2 Corner sum for each longitudinal seam joint in the second section of jurisdiction ring in j scheme；M_j(n+i)(1-ξ) is j side The moment of flexure that in case, the longitudinal seam joint of the second numbered n+i of section of jurisdiction ring bears, its numerical value is drawn by step 4； K_j(n+i)The longitudinal seam joint bending resistance corresponding for the longitudinal seam joint of the second numbered n+i of section of jurisdiction ring in j scheme is firm Degree；

Step 6, in the segment partition scheme of d kind section of jurisdiction ring, each scheme can be obtained successively according to step 5 The first section of jurisdiction ring and the corner sum of the second section of jurisdiction ring, be i.e. followed successively by θ₁, θ₂... θ_d；If β is it The angle of middle minimum, i.e. β=Min (θ₁, θ₂... θ_d), then with the first section of jurisdiction ring and the second section of jurisdiction ring Corner sum be the section of jurisdiction ring segment partition scheme corresponding to β be the optimum pipe in the ring segment partition scheme of d kind section of jurisdiction Loop segment partition scheme.When the corner sum of the first section of jurisdiction ring and the second section of jurisdiction ring is the section of jurisdiction ring corresponding to β When segment partition scheme has two kinds, i.e. the corner sum of this two schemes is identical, then with in this two schemes The scheme of the variance minimum of each longitudinal seam joint corner of one section of jurisdiction ring and the second section of jurisdiction ring is as optimum section of jurisdiction Ring segment partition scheme.

The method of the present embodiment is applicable to the staggered joint erection section of jurisdiction ring of shield tunnel, only needs section of jurisdiction during analysis The relevant mechanics parameter of longitudinal seam joint, can make relevant evaluation to scheme, motivated, methodological science Rationally, easy to use, time saving and energy saving.

In describing the invention, it is to be understood that term " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " etc. instruction orientation or Position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and Jian Change and describe rather than indicate or imply that the device of indication or element must have specific orientation, with specific Azimuth configuration and operation, be therefore not considered as limiting the invention.

Although the foregoing describing the detailed description of the invention of the present invention, but those skilled in the art should managing Solving, this is merely illustrative of, and protection scope of the present invention is defined by the appended claims.Ability The technical staff in territory, can be to these embodiments on the premise of without departing substantially from the principle of the present invention and essence Make various changes or modifications, but these changes and amendment each fall within protection scope of the present invention.

Claims (4)

1. the scheme comparison of a shield tunnel loop partitioned mode analyzes method, it is characterised in that Choosing continuous print two endless tube sheet during the scheme comparison of partitioned mode to be analyzed, it comprises the following steps:

Step 1, with starting point for section of jurisdiction ring central angle directly over the first section of jurisdiction ring, the section of jurisdiction ring of this position The number of degrees of central angle are 0 degree；The number of degrees of section of jurisdiction ring central angle increase in a clockwise direction；If the first section of jurisdiction Ring has n longitudinal seam joint, and longitudinal seam joint is numbered from the section of jurisdiction ring central angle moderate corresponding to each longitudinal seam joint The longitudinal seam joint of the section of jurisdiction ring central angle that number is minimum starts, and represents the i-th longitudinal joint of the first section of jurisdiction ring with i The numbering of joint, wherein 1≤i≤n, withRepresent corresponding to the i-th longitudinal seam joint of the first section of jurisdiction ring Section of jurisdiction ring central angle, with K_iRepresent the longitudinal seam joint bending rigidity corresponding to i-th longitudinal seam joint；

Step 2 adjacent with the first section of jurisdiction ring for the second section of jurisdiction ring, the partitioned mode of the second section of jurisdiction ring with First section of jurisdiction ring is identical, the starting point being section of jurisdiction ring central angle with the surface of the second section of jurisdiction ring, this position The number of degrees of section of jurisdiction ring central angle are 0 degree；The number of degrees of section of jurisdiction ring central angle increase in a clockwise direction；With One section of jurisdiction ring is identical, and the second section of jurisdiction ring also has n longitudinal seam joint, and longitudinal seam joint is numbered from each longitudinal seam joint In corresponding section of jurisdiction ring central angle, the longitudinal seam joint of the section of jurisdiction ring central angle that the number of degrees are minimum starts, with n+i Represent the numbering of the second section of jurisdiction ring i-th longitudinal seam joint, wherein 1≤i≤n, withRepresent the second section of jurisdiction The section of jurisdiction ring central angle corresponding to i-th longitudinal seam joint of ring, with K_n+iRepresent the i-th of the second section of jurisdiction ring Longitudinal seam joint bending rigidity corresponding to individual longitudinal seam joint；When shield tunnel uses through seam assembling, And K_i=K_n+i；When shield tunnel uses staggered joint erection,And K_i≠K_n+i；

Step 3, the design load born according to shield tunnel, do not consider the longitudinal seam joint of section of jurisdiction ring Impact, will section of jurisdiction ring as the homogenizing annulus without longitudinal seam joint, be calculated this homogenizing annulus along ring Moment of flexure to distribution；If ring central angle in section of jurisdiction is on homogenizing annulusThe absolute value M of place's moment of flexure_i, homogenizing On annulus, ring central angle in section of jurisdiction isThe absolute value M of place's moment of flexure_n+i；

Step 4, set the moment of flexure increase rate of section of jurisdiction ring as ξ, the then longitudinal seam joint of the first numbered i of section of jurisdiction ring The moment of flexure born is (1-ξ) × M_i, the moment of flexure that the longitudinal seam joint of the second numbered n+i of section of jurisdiction ring bears is (1-ξ)×M_n+i；

Step 5, it is provided with f kind section of jurisdiction ring segment partition scheme, the numbered j of the segment partition scheme of section of jurisdiction ring, wherein 1≤j≤f, it may be assumed that

Each longitudinal seam joint in the first section of jurisdiction ring in j scheme Moment on corresponding homogenizing annulus Under corner sum be:

${\mathrm{\&theta;}}_{j1}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{\mathrm{ji}}(1-\mathrm{\&xi;})}{K_{\mathrm{ji}}};$

Under each longitudinal seam joint of the second section of jurisdiction ring in j scheme Moment on corresponding homogenizing annulus Corner sum be:

${\mathrm{\&theta;}}_{j2}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{j(n+i)}(1-\mathrm{\&xi;})}{K_{j(n+i)}};$

Then under the first section of jurisdiction ring in j scheme and the second section of jurisdiction ring Moment on corresponding homogenizing annulus The corner sum of all longitudinal seam joints be:

${\mathrm{\&theta;}}_j={\mathrm{\&theta;}}_{j1}+{\mathrm{\&theta;}}_{j2}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{\mathrm{ji}}(1-\mathrm{\&xi;})}{K_{\mathrm{ji}}}+\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\frac{M_{j(n+i)}(1-\mathrm{\&xi;})}{K_{j(n+i)}};$

In above-mentioned formula, subscript j of each symbol represents the relevant parameter in scheme j, wherein, θ_j1For j The corner sum of each longitudinal seam joint in the first section of jurisdiction ring in scheme；M_ji(1-ξ) is in j scheme The moment of flexure that one section of jurisdiction ring i longitudinal seam joint bears, its numerical value is drawn by step 4；K_jiFor in j scheme The longitudinal seam joint bending rigidity that one section of jurisdiction ring i longitudinal seam joint is corresponding；θ_j2For the second section of jurisdiction ring in j scheme In the corner sum of each longitudinal seam joint；M_j(n+i)(1-ξ) is that in j scheme, the second section of jurisdiction ring is numbered The moment of flexure that the longitudinal seam joint of n+i bears, its numerical value is drawn by step 4；K_j(n+i)For the second pipe in j scheme The longitudinal seam joint bending rigidity that the longitudinal seam joint of the numbered n+i of loop is corresponding；

Step 6, in the segment partition scheme of f kind section of jurisdiction ring, each scheme can be obtained successively according to step 5 The first section of jurisdiction ring and corner sum θ of the second section of jurisdiction ring_j, i.e. θ_jIt is followed successively by θ₁, θ₂... θ_f；If γ For wherein minimum angle, i.e. γ=Min (θ₁, θ₂... θ_f), then with the first section of jurisdiction ring and the second section of jurisdiction The corner sum of ring be the section of jurisdiction ring segment partition scheme corresponding to γ be the optimum in the ring segment partition scheme of f kind section of jurisdiction Section of jurisdiction ring segment partition scheme.

2. the scheme comparison of shield tunnel loop partitioned mode as claimed in claim 1 analyzes method, It is characterized in that, when shield tunnel uses staggered joint erection, 0 < ξ < 1 in step 4.

3. the scheme comparison of shield tunnel loop partitioned mode as claimed in claim 1 analyzes method, It is characterized in that, when shield tunnel uses through seam assembling, ξ=0 in step 4.

4. the scheme comparison of shield tunnel loop partitioned mode as claimed in claim 1 analyzes method, It is characterized in that, in described step 6, when the corner sum of the first section of jurisdiction ring and the second section of jurisdiction ring is γ institute When corresponding section of jurisdiction ring segment partition scheme has two or more, then to have the scheme of identical corner sum In the minimum scheme of the variance of each longitudinal seam joint corner of the first section of jurisdiction ring and the second section of jurisdiction ring as optimum Section of jurisdiction ring segment partition scheme.