A Design Method of Shield Cutterhead Profile Considering Stratum Variation
A design method and technology of shield cutterhead, which is applied in design optimization/simulation, mining equipment, earthwork drilling and mining, etc., can solve the problem of not considering the earth pressure balance, not calculating the characteristic parameters of the cutterhead contour, and the fuzzy design process of the cutterhead contour And other issues
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Embodiment 1
[0137] From formula (1) and formula (2), when the value range of c is {4,5,6}, r s Approximate values are shown in Table 1.
[0138] Table 1 r when the range of c is {4,5,6} s approximation
[0139] c θ(rad) θ / 2(rad) r s (m)
4 π / 2 π / 4 0.71w 5 0.4π π / 5 0.85w 6 π / 3 π / 6 w
[0140]Take a section tunnel as an example, the tool installation width w is 0.4m, then r s Approximate values are shown in Table 2.
[0141] Table 2 When the range of c is {4,5,6} and w is 0.4m, r s approximation
[0142] c θ(rad) θ / 2(rad) r s (m) approx.
Embodiment 2
[0143] Embodiment 2 Take the tunnel in a section of the Shenzhen Metro as an example. The tunnel passes through the composite stratum, and the top of the cutterhead is buried deep * H is 10m, groundwater depth * Z is 5m, cutter head radius * R is 3.5m, formation parameters are shown in Table 3, * p 0 is 200kPa, *γ w 10kN / m 3 , the tool installation width w is 0.4m, and the formation parameters are shown in Table 3.
[0144] Formation parameter of table 3 embodiment two
[0145]
[0146] It can be divided into 7 calculation conditions:
[0147] 1) 0s c,1 c,4 ≤15 (unit: m).
[0148] 2) 0s c,1 c,4 ≤15 (unit: m).
[0149] 3) 0s c,1 c,4 ≤17 (unit: m).
[0150] 4) 0s c,1 c,4 ≤17 (unit: m).
[0151] 5) 1≤r s c,1 ≤12.5,13.5c,4 ≤15 (unit: m).
[0152] 6) 1≤r s c,1 ≤12.5,15c,4 ≤17 (unit: m).
[0153] 7) 1≤r s c,1 c,4 ≤17 (unit: m).
[0154] Among them, for the calculation condition "7)", the calculation diagram is as follows Figure 4 shown. Since 1≤r s <1.5, so ac...
Embodiment 3
[0174] Embodiment 3 From formula (11) to formula (15), it can be obtained that when the range of c is {4, 6, 8,..., 20}, the included angle θ The values are shown in Table 10.
[0175] Table 10 Possible values of θ when the value range of c is {4,6,8,...,20}
[0176]
[0177] For example, in the case of the calculation condition 7) of Embodiment 2, the d of the largest single block of muck (solitary stone) existing in the complex formation of shield tunneling r is 0.4m, obtained in medium weathered granite strata, and the corresponding passability calculation results are shown in Table 11.
[0178] The passability calculation result of table 11 embodiment three
[0179]
[0180] For calculation cases 1), 2), 3), 4), 5), and 6), each r under each calculation condition must be s The possible values must be calculated accordingly. The lower limit of the opening height of the cutter head is calculated l min , and make the following judgments:
[0181] If a certain...
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