CN-121982964-A - Shield thick slurry simulation device and simulation method

CN121982964ACN 121982964 ACN121982964 ACN 121982964ACN-121982964-A

Abstract

The application discloses a shield thick slurry simulation device and a simulation method, which relate to the technical field of engineering building simulation experiments, wherein the shield thick slurry simulation device simulates an arc-shaped contour of a shield machine through a main structure, accurately simulates thick slurry injection positions of a front shield, a middle shield and a rear shield of the corresponding shield machine through a plurality of groups of injection holes of injection hole position components, wherein a visible structure simulates an interface gap between the outer side of a shield body and an excavated soil layer, a tester can observe key data such as diffusion form, speed and the like of shield thick slurry after mixed injection in real time and clearly through an acrylic transparent plate, an intuitive and effective observation path is provided for researching thick slurry diffusion rules, and the multi-angle simulation of the main structure can be realized through the arrangement of an adjusting structure, and the thick slurry injection conditions of different point shields are simulated. The thick slurry simulation device of the shield can accurately simulate thick slurry injection scenes of different construction angles, different parts of the shield machine and different circumferential positions, and clearly presents slurry diffusion forms by means of visual observation means.

Inventors

LAI WEIWEN
SHENG NAN
WU HONGTAO
HE JINHUI
YANG MENG
JIANG XIAOGUANG
HE LUN
XU YIN
QIAN WEIWEI
WANG CHAOYI
LING TIEJIAN
HUANG ZHI

Assignees

广东华隧建设集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251230

Claims (10)

1. A shield thick slurry simulation device is characterized by comprising The main body structure comprises a first side, a second side, a first end face and a second end face, wherein the first side and the second side are circular arc-shaped and concentric, the radius of the first side is larger than that of the second side, and the extension faces of the first end face and the second end face intersect in a circular shape of the first side or the second side; The injection hole site component is arranged in the main body structure and comprises a first injection hole group, a second injection hole group and a third injection hole group, wherein the injection hole groups are arranged at intervals along the width direction of the main body structure and are used for injecting thick slurry; A visual structure formed as the first side, the visual structure for viewing an interior of the body structure; the adjusting structure is arranged on the main body structure and is used for adjusting the inclination angle or the posture of the main body structure.
2. The shield thick slurry simulation device of claim 1, wherein the first injection hole group comprises a first grouting head, a second grouting head and a third grouting head, a connecting line from the first grouting head to the center of the first side is a first connecting line, a connecting line from the second grouting head to the center of the first side is a second connecting line, a connecting line from the third grouting head to the center of the first side is a third connecting line, an included angle formed by the first connecting line and the first end face is 3 degrees, an included angle formed by the first connecting line and the second connecting line is 25 degrees, and an included angle formed by the third connecting line and the second connecting line is 19 degrees.
3. The shield thick slurry simulation device of claim 2, wherein the second injection hole group comprises a fourth grouting head, a fifth grouting head and a sixth grouting head, a connecting line from the fourth grouting head to the center of the first side is set to be a fourth connecting line, a connecting line from the fifth grouting head to the center of the first side is set to be a fifth connecting line, a connecting line from the sixth grouting head to the center of the first side is set to be a sixth connecting line, an included angle formed by the fourth connecting line and the first end face is 10 degrees, an included angle formed by the fifth connecting line and the fourth connecting line is 18 degrees, and an included angle formed by the sixth connecting line and the fifth connecting line is 14 degrees.
4. A shield thick slurry simulation device according to claim 3, wherein the third injection hole group comprises a seventh grouting head and an eighth grouting head, a connecting line from the seventh grouting head to the center of the first side is a seventh connecting line, a connecting line from the eighth grouting head to the center of the first side is an eighth connecting line, an included angle formed by the seventh connecting line and the first end face is 17 degrees, and an included angle formed by the eighth connecting line and the seventh connecting line is 17 degrees.
5. The shield thick slurry simulation device of claim 4, wherein the grouting heads are controlled to open and close by hand valves.
6. The shield thick liquid simulation device of claim 1, wherein the adjusting structure comprises at least two sections of steel structure supporting legs, and two adjacent steel structure supporting legs are connected through bolts.
7. The shield thick paste simulator of claim 1, wherein the visual structure comprises two arc-shaped acrylic plates, and the joints between the two arc-shaped acrylic plates are connected through fasteners after sealant is smeared.
8. The shield thick liquid simulator of claim 7, wherein the periphery of the first side is provided with a sliding rail groove, the sliding rail groove is used for mounting an acrylic plate, the sliding rail groove is connected with the acrylic plate through a sealing adhesive layer, an interception plate is arranged on the sliding rail groove, and the height of the interception plate is 150mm.
9. The shield thick liquid simulator of claim 1, wherein the angle between the first end face and the second end face is 60 degrees.
10. A simulation method based on the shield thick paste simulation device according to any one of claims 1 to 9, characterized by comprising the steps of: the device is transported to a test site, and the main body structure is adjusted to a preset angle by utilizing an adjusting structure and is stably supported according to requirements; checking and sealing the visual structure, namely checking the tightness of the visual structure and cleaning the inner surface of the visual structure; Connecting a slurry injection system by connecting a pipeline of a thick slurry stirring and conveying device to an inlet end of a selected injection hole group; injection test, namely starting slurry conveying equipment, and injecting thick slurry according to slurry proportion, pressure and flow set by a test scheme; Real-time observation and recording, namely observing and recording the simulation conditions of the diffusion form, the flow direction, the filling speed and the coverage range of thick slurry in a simulated 150mm gap (between a shield body and a soil layer) in real time and clearly through a visual structure and a high-speed camera; and (3) parameter adjustment and comparison, namely repeating the steps by changing the opening combination of the injection hole group, the injection flow, the slurry property, the device angle and other parameters, and carrying out a plurality of groups of comparison tests.

Description

Shield thick slurry simulation device and simulation method Technical Field The application relates to the technical field of engineering building simulation experiments, in particular to a shield thick paste simulation device and a simulation method. Background In modern city infrastructure construction, shield construction is a core technical means for constructing an underground tunnel by virtue of a plurality of advantages. In the shield construction process, the thick slurry injection process is a key link for guaranteeing the construction quality and safety. The method has the effects of filling gaps between the shield body and the soil layer, preventing soil body from deforming and collapsing, reducing ground surface subsidence, enhancing stability of the tunnel structure and the like. However, the current shield thick liquid injection process has significant disadvantages in parameter setting. The traditional mode excessively depends on the past experience of engineers, and lacks a scientific and visual observation method for the diffusion behavior of the slurry in the shield body. This results in difficulty in accurately grasping the actual diffusion path, range, speed of slurry and change rules under different working conditions, so that the process parameter setting has larger blindness and cannot be fully adapted to complex and changeable construction environments. The existing shield thick slurry injection simulation device has common design defects. Most devices cannot simulate construction scenes of the shield machine under different gradients and inclination angles, the shield machine is rich and various in gestures in actual construction, the limitation severely limits the comprehensiveness and the authenticity of a simulation test, and the requirements of contrast research on thick paste injection effects of different parts cannot be met, so that the deviation between test data and actual working conditions is huge, and engineering practice is difficult to effectively guide. These problems prevent the technological innovation and optimization of the shield thick slurry injection process, and an innovative simulation test device is urgently needed to solve the problems. Disclosure of Invention The present application aims to solve one of the above technical problems in the prior art. Therefore, the embodiment of the application provides a shield thick slurry simulation device. The embodiment of the application also provides a simulation method based on the shield thick slurry simulation device. According to an embodiment of the first aspect of the present application, there is provided a shield thick slurry simulation device, including a main body structure including a first side, a second side, a first end surface and a second end surface, the first side and the second side being circular and concentric, a radius of the first side being larger than a radius of the second side, an extension surface of the first end surface and the second end surface intersecting a circular shape of the first side or the second side; The injection hole site component is arranged in the main body structure and comprises a first injection hole group, a second injection hole group and a third injection hole group, wherein the injection hole groups are arranged at intervals along the width direction of the main body structure and are used for injecting thick slurry; A visual structure formed as the first side, the visual structure for viewing an interior of the body structure; the adjusting structure is arranged on the main body structure and is used for adjusting the inclination angle or the posture of the main body structure. The shield thick slurry simulation device has the advantages that the arc-shaped outline of the shield machine is simulated through the main structure, thick slurry injection positions of the front shield, the middle shield and the rear shield of the shield machine are accurately simulated through the multiple groups of injection holes of the injection hole position components, wherein the visible structure simulates the interface clearance between the outer side of the shield body and the excavated soil layer, experimenters can observe key data such as diffusion form, speed and the like of shield thick slurry after mixed injection in real time and clearly through the acrylic transparent plate, an intuitive and effective observation path is provided for researching thick slurry diffusion rules, the multi-angle simulation of the main structure can be realized through the arrangement of the adjusting structure, and the thick slurry injection conditions of shields at different points are simulated. The shield thick slurry simulation device can accurately simulate thick slurry injection scenes of different construction angles, different parts of a shield machine and different circumferential positions, clearly and accurately presents slurry diffusion forms by means of visual and efficient obs