A Judgment Method for the Positional Relationship Between the Shield Tail and the Segments of Large-diameter Shield TBMs

A technology of shield shield and large diameter, which is applied in the field of determining the positional relationship between the shield tail and the segment, which can solve the problems affecting the construction progress, segment misalignment, damage, etc., so as to reduce the investment of construction workers, speed up the construction production efficiency, Optimizing the effect of segment selection

CN112746856BActive Publication Date: 2022-03-01ROAD & BRIDGE INT +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-03-01

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Abstract

The invention provides a method for judging the positional relationship between the shield tail and the segment of a large-diameter shield. In the early stage of construction, according to the design drawing of the shield machine manufacturer, the stroke of the propulsion cylinder and the hinge stroke of the selected four points are calculated through the spatial geometric relationship. Calculation formula, further calculate the vertical position relationship formula between the segment and the shield tail according to the calculation formula of the stroke of the propulsion cylinder and the stroke of the hinge cylinder; establish an EXCEL table, and calculate the stroke of the push cylinder, the stroke of the hinge cylinder, and the stroke of the push cylinder and the hinge cylinder of each partition The stroke calculation formula and the judgment formula for the positional relationship between the segment and the shield tail are input into the form, and then imported into the upper computer of the shield machine to judge the positional relationship between the shield tail and the segment. The invention optimizes the basis for judging the type selection of the segments, and helps to improve the tunnel forming quality and construction efficiency.
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Description

technical field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a method for determining the positional relationship between a shield tail and a segment when a shield tunneling method is used for subway tunnel construction. Background technique

[0002] Segment selection for shield tunneling is an important link in the construction of shield-tunneled subway tunnels. The quality of segment selection directly affects the posture adjustment of shield tunneling and the assembly quality of segments. The existing segment selection method is mainly based on the following data: (1) stroke difference of propulsion cylinder in each zone of shield machine; (2) shield tail clearance; (3) attitude of shield machine; (4) stroke of hinged cylinder in each zone Difference. Through the comparison of the above data, determine the segment trend, posture, position relationship with the shield tail, and fit with the trend of the shield ma...

Examples

Embodiment Construction

[0034] The overall process of the present invention is as figure 1 As shown, in the early stage of construction, according to the design drawings of the shield machine manufacturer, the calculation formulas of the propulsion cylinder stroke and hinge stroke of the selected four points are calculated through the spatial geometric relationship, and the formulas are input into the EXCEL table and then imported into the upper computer of the shield machine. After the import is completed, it can be used in the construction process.

[0035] Such as figure 2 As shown, during the shield construction process, the center of the segment 1 coincides with the center of the front shield 2 in the shield machine, and the space between the segment 1 and the shield tail 3 is geometrically parallel, which is the optimal positional relationship between the segment and the shield tail. However, in the actual construction process, because the shield machine needs to fit the design axis for excav...