CN215632982U - Tunnel model test tunnel excavation device - Google Patents

Abstract

The utility model discloses a tunnel excavation device for a tunnel model test, belongs to the field of tunnel model tests, and solves the problems of low construction accuracy in the prior art; the degree of automation is low; the problem of the error of tunnel settlement is produced, and the technical scheme is as follows: including inside mold box, positioner and the drilling equipment who fills similar material, its characterized in that two holes have been seted up on the relative curb plate of mold box, hole department is provided with the baffle and is used for the shutoff, drilling equipment is including passing the drilling rod of hole, the outer fixed cover of drilling rod is equipped with a supporting cylinder, and a supporting cylinder is used for lining the country rock temporarily, and the commonality is strong, simple structure, and the cost is lower, easy to operate supports a section of thick bamboo and plays the effect of lining temporarily simultaneously during the excavation tunnel, greatly reduced tunnel settlement's error.

Description

Tunnel model test tunnel excavation device

Technical Field

The utility model belongs to the field of tunnel model tests, and particularly relates to a tunnel excavation device for a tunnel model test.

Background

With the increasing investment of the country to the field of infrastructure, soil mechanics and scientific technology are continuously developed and matured, urban subway tunnels and mountain tunnels are also given rapid development opportunities and occupy extremely important economic and strategic positions in the field of traffic tracks in China. However, tunnel traffic still suffers from a lot of problems of great magnitude and small magnitude under the influence of factors such as geology, climate and construction process in construction and operation, and the time and the cost are wasted under the condition that the problems cannot be solved depending on the actual working conditions of the tunnel. Therefore, the method has important theoretical significance and engineering practical value for researching the construction technical problem by establishing a corresponding tunnel model through a similar theory and carrying out an indoor test.

In actual urban tunnel construction, the shield machine is most commonly used, but the large shield machine cannot play the role under the condition of a test model, construction is usually performed in a mode of manually excavating a tunnel face, a large amount of physical power is consumed, the working efficiency is low, and the excavation effect error is large.

Through retrieval, a Chinese patent with publication number CN111595606B discloses a tunnel model test tunnel excavation device and method, solves the problems of low efficiency and large excavation error in the excavation process in the prior art, has strong universality, can be repeatedly used, is convenient to install and dismantle, can set different hole shapes and excavation positions according to test requirements, and can complete various working conditions. The technical scheme is as follows: the device comprises a model test box, an orienting device and a drilling device, wherein the model test box is used for filling similar materials for model tests, tunnel holes are respectively formed in the two corresponding sides of the model test box, and the tunnel holes can be plugged through a hole baffle; the orienting device is detachably arranged at the position of a tunnel hole at one side of the model test box and comprises a plurality of positioning cylinders; the drilling device can penetrate through the positioning cylinder, and drilling and excavation are achieved through the rotary drilling device.

However, the comparison document has the following defects:

1. the positioning cylinder is difficult to penetrate through and install, and the cylinder shaft is difficult to control to be vertical to the model box, so that the construction accuracy is low;

2. the positioning cylinders are installed in advance, the number of holes between adjacent positioning cylinders is large, and subsequent treatment is troublesome;

3. the rotating shaft is manually rotated, one piece of construction is needed, the automation degree is low, and the construction efficiency is influenced;

4. after excavation, uncut soil bodies need to be treated, and cannot be supported in time, so that tunnel settlement errors are caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides the tunnel model test tunnel excavation device and the construction method, which have the advantages of strong universality, simple structure, lower cost and easy operation, and the support cylinders simultaneously play a role in temporary lining when the tunnel is excavated, so that the tunnel settlement error is greatly reduced.

The technical scheme adopted by the utility model is as follows:

the utility model provides a tunnel model test tunnel excavation device, includes inside mold box, positioner and the drilling equipment who fills similar material the mold box includes the proof box frame and installs in the transparent baffle of proof box frame, packs similar material in the mold box, has seted up two cylindricality holes on relative curb plate on the mold box, cylindricality hole department is provided with the baffle and is used for the shutoff, the fender can be dismantled to be connected in the model proof box side, and the mounted position of shelves pole is adjustable, drilling equipment is including passing the drilling rod of hole, the fixed cover of drilling rod overcoat is equipped with a support cylinder, and a support cylinder is used for lining the country rock temporarily, prevents that the tunnel from subsiding and takes place.

By adopting the technical scheme, after the drill rod passes through the hole, the support cylinder which is arranged through the drill rod jacket can be used for treating uncut soil body, the effect of temporary lining surrounding rock is achieved, the tunnel settlement is prevented, the test accuracy and the test result consistency are improved, a plurality of positioning cylinders are prevented from being installed in the model box in advance, the number of holes between the adjacent positioning cylinders is large, and the problem that the later stage is difficult to treat is avoided.

Preferably, the drill rod main body is provided with a spiral baffle plate, and the spiral baffle plate is provided with a cutting edge. By adopting the preferred technical scheme, the edged spiral baffle on the drill rod main body can not only cut up soil blocks, but also convey soil bodies to the outside of the tunnel hole along the baffle, so that the construction site is clean and convenient for next construction.

Preferably, a quadrangular pyramid-shaped cutter head is fixedly arranged at the end part of the drill rod, and the section of the cutter head is cross-shaped. Adopt this preferred technical scheme, the most advanced that the drilling rod tip set up among the prior art is compared to, and the drilling rod drives the blade disc rotation, and four cutting edges have been seted up to the blade disc, can promote the drilling rod to the cutting efficiency of the soil body, have accelerated the excavation progress greatly.

Preferably, the lifting drilling machine device comprises a drilling machine support, a lifting mechanism and an electric drilling machine, wherein the lifting mechanism is a vertically arranged sliding rail, the electric drilling machine can vertically adjust the position of the electric drilling machine along the lifting mechanism and lock the electric drilling machine, and the drill rod is detachably arranged on the electric drilling machine and can provide rotary power for the drill rod. By adopting the optimized technical scheme, the lifting drilling machine is mature in the prior art, the drill rod is detachably arranged on the electric drilling machine, the position of the drill rod can be adjusted along with the change of the position of the tunnel model, the lifting drilling machine is used for providing rotary power required by soil excavation, and two gears of 'advancing/retreating' are arranged to control the advancing or retreating of the drill rod and the supporting barrel, so that manual excavation is replaced, manpower is saved, and the working efficiency is improved to a great extent.

Preferably, the electric drilling machine interface is a cross plum blossom interface, the end part of the drill rod is a cross connecting bolt, and the cross plum blossom interface is matched with the cross connecting bolt to enable the drill rod to be meshed and connected with the electric drilling machine. By adopting the preferable technical scheme, the installation of the drill rod and the electric drilling machine is realized.

Preferably, the supporting cylinder is a circular hollow cylinder body with two unsealed ends, the end part of the supporting cylinder is provided with a blade ring, the inner wall of the supporting cylinder is fixedly provided with a plurality of fixing columns, the number of the fixing columns is preferably 6, and the 6 fixing columns are welded on the front section, the middle section and the tail section of the drill rod and the cylinder wall in a distributed mode. By adopting the preferred technical scheme, the supporting barrel is a circular hollow barrel body with two unsealed ends, soil bodies convenient to cut are sent out from the tail end of the supporting barrel along the threaded baffle, a blade ring is arranged at one end part close to the soil bodies, the rotating soil breaking is convenient to rotate, the guiding effect is achieved, and the fixing columns are welded at the front section, the middle section and the tail section of the barrel wall respectively, so that the connecting structure of the supporting barrel and the drill rod is more stable.

Preferably, the supporting cylinder and the drill rod are coaxially arranged, the diameter of the drill rod is 1/3 of the diameter of the supporting cylinder, and the distance between the spiral baffle and the wall of the supporting cylinder is 1-2 mm.

Preferably, positioner is including setting up the laser positioner on electric drill and corresponding the sensitization device that sets up hole all around on the mold box, laser positioner lays four laser lamps on electric drill for the annular, sensitization device lays the sensitization disk on the hole circumference for corresponding the annular, and the position that the sensitization disk shines on the mold box according to the laser lamp is arranged, and the sensitization disk is used for receiving the laser that the laser lamp sent, plays the effect of drilling rod and hole location. The laser lamps emit laser light which is respectively arranged at the upper, lower, left and right sides parallel to the holes, and the light is positioned at the quarter circular arc boundary of the tunnel holes.

A construction method of a tunnel model test tunnel excavation device comprises the following construction steps:

A. according to the survey data, calculating the similarity ratio of the tunnel model to obtain similar geometric dimensions and similar materials;

B. cutting tunnel holes according to design requirements and installing baffles;

C. after the model boxes are arranged, filling similar materials in layers according to requirements and compacting layer by layer;

D. after filling similar materials, covering a steel plate, and carrying out static pressure for 24 hours by using a jack to ensure that the filling materials are compacted;

E. after static pressure, disassembling a baffle, installing a drill rod on a lifting drilling machine device, starting a laser positioning device and a photosensitive device for positioning, keeping the center line of the drill rod to be superposed with the axis of the tunnel hole, and completing debugging of the device;

F. excavating a tunnel, starting drilling, keeping constant-speed excavation, if a photosensitive device does not receive a signal in the tunneling process, indicating that the tunnel excavation is deviated from a design route, and returning to the design route by finely adjusting the direction of a supporting cylinder ring edge, so that the accuracy of the tunnel excavation is improved, the tunnel excavation is stopped after reaching the set excavation depth, primary spray supporting is carried out, and tunnel settlement is prevented; sequentially and circularly excavating until the excavation is finished;

G. and (5) after excavation is finished, detaching the device.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. after the drilling rod passes the hole, the supporting barrel of establishing through the drilling rod overcoat can be to the soil body that need handle not cutting, plays the effect of temporary lining surrounding rock, prevents that the tunnel from subsiding the emergence, improves the uniformity of experimental accuracy and test result, avoids simultaneously installing a plurality of location section of thick bamboo in the model box in advance, and it is more to cause the hole between the adjacent location section of thick bamboo, and the later stage is difficult to the problem of handling.

2. The spiral baffle is arranged on the drill rod main body, the spiral baffle is provided with a cutting edge, and the cut spiral baffle on the drill rod main body can not only cut up soil blocks, but also convey soil bodies to the outside of a tunnel hole along the baffle, so that a construction site is clean and construction in the next step is facilitated.

3. The drilling rod tip has set firmly the blade disc of quadrangular pyramid shape, and the cross-section of blade disc is cross, and the drill rod drives the blade disc rotation relatively in the most advanced of drilling rod tip setting among the prior art, and four cutting edges have been seted up to the blade disc, can promote the drilling rod to the cutting efficiency of the soil body, have accelerated the excavation progress greatly.

4. The drill rod is detachably arranged on the electric drilling machine, the position of the drill rod can be adjusted along with the change of the position of the tunnel model, the lifting drilling machine is used for providing rotary power required by soil excavation, and the advancing/retreating gear control device is provided with two gears for controlling the advancing or retreating of the drill rod and the supporting barrel, so that manual excavation is replaced, the labor is saved, and the working efficiency is improved to a great extent.

5. The supporting cylinder is a circular hollow cylinder body with two unsealed ends, soil bodies convenient to cut are sent out from the tail end of the supporting cylinder along the threaded baffle, a blade ring is arranged at one end part close to the soil bodies, the rotating soil breaking is convenient to rotate, the guiding effect is achieved, the fixing columns are welded at the front section, the middle section and the tail section of the cylinder wall respectively, and the connecting structure of the supporting cylinder and the drill rod is more stable.

6. In the excavation process, the sensitization disk is used for receiving the laser that the laser lamp sent, plays the effect of drilling rod and hole location, and whether real-time supervision excavation route squints, if laser light skew preset position, then finely tune the direction of supporting the barrel ring sword immediately to setting for the route, improves the precision of excavation to the at utmost, ensures that the excavation route is accurate.

7. Simple structure makes things convenient for preparation and installation, and positioner is connected fixed mode simple with the proof box, and applicable most tunnel model proof box also can utilize after simple repacking for existing model proof box.

Drawings

The utility model will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a tunnel excavation device for a tunnel model test according to the present invention;

FIG. 2 is a schematic structural view of a rig hoist apparatus of the present invention;

FIG. 3 is a schematic structural view of a support cylinder according to the present invention;

FIG. 4 is a schematic view of the screw and cutter head of the present invention;

FIG. 5 is a schematic view of the structure of the mold box of the present invention.

Reference numerals

The device comprises a model box (1), a hole (2), a baffle (3), a drill rod (4), a supporting cylinder (5), a blade ring (501), a fixing column (502), a spiral baffle (6), a cutter head (7), a lifting drilling machine device (8), a drilling machine support (801), a lifting mechanism (802), an electric drilling machine (803), a cross plum blossom interface (804), a laser positioning device (9) and a photosensitive device (10).

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of embodiments of the present application, generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail with reference to fig. 1 to 5.

A tunnel model test tunnel excavation device comprises a model box 1 filled with similar materials inside, a positioning device and a drilling device, wherein the model box 1 is a non-capping cubic box and comprises a test box frame and a transparent baffle 3 arranged on the test box frame, the model box 1 is filled with the similar materials, two cylindrical holes 2 are formed in opposite side plates on the model box 1, the positions of the cylindrical holes 2 are provided with the baffle 3 for blocking, the baffle is detachably connected to the side surface of the model test box, the installation position of the baffle is adjustable, the drilling device comprises a drill rod 4 capable of penetrating through the holes 2, the drill rod 4 is used for excavating a tunnel face, in order to improve the cutting efficiency of the drill rod 4 to a soil body, the excavation progress is greatly accelerated, a spiral baffle 6 is arranged on the main body of the drill rod 4, and a blade is arranged on the spiral baffle 6, a quadrangular pyramid-shaped cutter head 7 is rigidly welded at the end part of the drill rod 4, the section of the cutter head 7 is cross-shaped, and the spiral baffle 3 and the cutter head 7 which are edged on the main body of the drill rod 4 can not only cut soil blocks, but also convey soil bodies to the outside of the tunnel holes along the baffle 3, so that the construction site is clean; in order to solve the problem that the tunnel that exists among the prior art sinks the error that leads to too big, can 4 outer fixed sheathes of drilling rod are equipped with a supporting cylinder 5, supporting cylinder 5 plays the effect of temporary lining surrounding rock at the excavation in-process, prevents that the tunnel from subsiding and taking place.

In the above embodiment, the supporting cylinder 5 is a circular hollow cylinder with two unsealed ends, the size of the supporting cylinder 5 needs to be customized according to the actual size of the tunnel, the outer wall of the cylinder plays a role of temporarily lining surrounding rocks for the uncut soil body to be processed in the excavation process, so as to prevent the tunnel from settling, the end part of the cylinder is provided with a cutting edge 501, the inner wall of the cylinder is fixedly provided with a plurality of fixing columns 502, the number of the fixing columns 502 is preferably 6, and 6 fixed columns 502 are distributed and welded on the front section, the middle section and the tail section of the drill rod 4 and the cylinder wall, the supporting cylinder 5 is a circular hollow cylinder body with two unsealed ends, the cut soil body is conveniently sent out from the tail end of the supporting cylinder 5 along the threaded baffle 3, a blade ring 501 is arranged at one end part close to the soil body, the rotation and the soil breaking are convenient, the guiding effect is simultaneously realized, the fixed columns 502 are respectively welded on the front section, the middle section and the tail section of the cylinder wall, and the connecting structure of the supporting cylinder 5 and the drill rod 4 is more stable.

In the above embodiment, the support cylinder 5 and the drill rod 4 are coaxially arranged, the diameter of the drill rod 4 is 1/3 of the diameter of the support cylinder 5, and the distance between the spiral baffle 6 and the wall of the support cylinder 5 is 1-2 mm.

In the above embodiment, the distance between the cutter head 7 and the spiral baffle 3 and the inner wall of the cylinder body is 2 mm.

In the above embodiment, the material of the baffle 3 may be selected according to actual requirements, and is preferably made of wood, steel, or the like.

In the above embodiment, the model test box is steel structure frame, adopts toughened glass baffle 3, can provide sufficient intensity and can conveniently observe the test process again, and model test box structural design can be used to most tunnel model tests, and the commonality is strong.

The specific implementation mode that the baffle plate is detachably connected with the model box 1 is that a plurality of L-shaped fixed seats are symmetrically and fixedly arranged on two sides of the opening of the model box 1, and horizontal baffle rods are arranged on the L-shaped fixed seats and used for pressing the baffle plate 3 on the hole 2 of the model box 1, so that the baffle plate and the hole 2 are blocked.

In the above embodiment, the device further comprises a lifting drilling machine device 8, the lifting drilling machine device 8 comprises a drilling machine support 801, a lifting mechanism 802 and an electric drilling machine 803, the lifting mechanism 802 is a vertically arranged slide rail, the electric drilling machine 803 can adjust the position of the electric drilling machine 803 up and down along the lifting mechanism 802 and lock the electric drilling machine 803, the interface of the electric drilling machine 803 is a cross plum blossom interface 804, the end of the drill rod 4 is a cross connecting bolt, the cross plum blossom interface is matched with the cross connecting bolt to enable the drill rod 4 to be meshed and connected with the electric drilling machine 803, so that the drill rod 4 can be detachably mounted on the electric drilling machine 803 and can provide rotary power for the drill rod 4, the lifting drilling machine is a mature prior art, the drill rod 4 is detachably mounted on the electric drilling machine 803, the position of the drill rod 4 can be adjusted along with the change of the position of the tunnel model, and the lifting drilling machine is used for providing rotary power required by soil excavation, the 'advancing/retreating' gears are arranged to control the drill rod 4 and the supporting cylinder 5 to advance or retreat, manual excavation is replaced, manpower is saved, and the working efficiency is improved to a great extent.

It should be noted that the lifting drilling machine is an existing public device, is not a creative point protected by the technical scheme of the present invention, and the working principle and the specific structure thereof are not elaborated in detail in the present invention.

In the above embodiment, the positioning device includes the laser positioning device 9 disposed on the electric drilling machine 803 and the photosensitive device 10 correspondingly disposed around the hole 2 on the model box 1, the laser positioning device 9 is four laser lamps annularly disposed on the electric drilling machine 803, the photosensitive device 10 is a photosensitive wafer annularly disposed on the circumference of the hole 2, the photosensitive wafer is disposed according to the position of the laser lamp irradiated on the model box 1, and the photosensitive wafer is used for receiving the laser emitted by the laser lamp, so as to position the drill rod 4 and the hole 2. The distance interval between the adjacent photosensitive wafers is a quarter circular arc, the laser lamps emit laser beams which are parallel to the holes and are respectively arranged at the upper side, the lower side, the left side and the right side of the holes, the light beams are positioned to the quarter circular arc boundary line of the tunnel holes 2, whether the excavation path deviates can be monitored in real time in the excavation process, if the laser beams deviate from the preset position, the direction of the 5 ring edges of the supporting cylinder is immediately finely adjusted to the set path, the excavation precision is improved to the maximum degree, and the accuracy of the excavation path is ensured.

A construction method of a tunnel model test tunnel excavation device comprises the following construction steps:

A. according to the survey data, calculating the similarity ratio of the tunnel model to obtain similar geometric dimensions and similar materials;

B. cutting tunnel holes according to design requirements and installing a baffle 3;

C. filled with a similar material. Sealing the hole 2 of the model box 1 by using a baffle 3, and filling and paving prepared similar materials layer by layer and compacting the materials;

D. after the similar materials are filled, a jack is used for jacking the top plate of the die mould box 1 for 24 hours, so that the similar materials reach a stable state;

E. debugging an excavation device, after similar materials are stable, starting to install a lifting drilling machine device 8, and moving an electric drilling machine 803 machine body up and down to ensure that the electric drilling machine 803 can be adjusted according to the position of a hole 2 on the model box 1; starting the electric drilling machine 803, selecting a gear of the electric drilling machine 803 according to the set excavation speed, and providing sufficient excavation power for the support cylinder 5 and the auger stem 4; fixing the welded customized support cylinder 5 and the spiral drill rod 4 at the interface of the drilling machine through a cross connecting bolt, and ensuring that the central axes of the drilling machine, the drill rod 4, the support cylinder 5 and the cutter head 7 are coincident; the distance between the cutter head 7 and the spiral baffle 3 is about 2mm from the cylinder wall; the edge of the support cylinder 5 is tightly attached to the hole of the model box 1, the height of the electric drilling machine 803 is adjusted at the same time, the auger stem 4, the support cylinder 5 and the axis of the tunnel hole are overlapped, a laser lamp is turned on, the photosensitive wafer is attached to the position of the light on the model box 1, and the debugging of the device is finished;

F. and (3) excavating a tunnel, starting the lifting drilling machine device 8, rotationally excavating the hole along the circle of blades of the supporting cylinder 5 under the excavating power provided by the electric drilling machine 803, simultaneously cutting soil in the supporting cylinder 5 by the cutter head 7, conveying the soil to the outside of the tunnel hole 2 through the spiral baffle 3, and cutting and conveying soil blocks cut by the cutter head 7 again. If the photosensitive wafer is not bright in the tunneling process, the deviated design route of tunnel excavation is indicated, the lifting drilling machine is forbidden to move greatly, the design route is returned by finely adjusting the direction of the 5-ring edge of the supporting cylinder, and the accuracy of tunnel excavation is greatly improved. After the excavation reaches the set footage, the motor is suspended, primary support is timely carried out at the stage of excavation to prevent tunnel settlement, at the moment, the wall of the supporting cylinder 5 plays a role of temporary lining of the excavation section to support surrounding rocks, the error of tunnel settlement is reduced to the maximum extent, the excavation support is circulated to the tunnel excavation, and the excavation is efficient, safe and convenient.

G. And (5) after excavation is finished, detaching the device.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.

Claims (9)

1. The utility model provides a tunnel model test tunnel excavation device, includes inside mold box (1), positioner and the drilling equipment who fills similar material, its characterized in that two holes (2) have been seted up on the relative curb plate of mold box (1), drilling equipment is including passing drilling rod (4) of hole (2), drilling rod (4) outer fixed cover is equipped with one and is used for interim lining cutting country rock supporting cylinder (5), is equipped with spiral baffle (6) in drilling rod (4) main part, the cutting edge has been seted up in spiral baffle (6), positioner is including setting up laser positioning device (9) on electric drill (803) and corresponding setting up hole (2) photosensitive device (10) all around on mold box (1).

2. The tunnel excavation device for the tunnel model test according to claim 1, wherein a cutter head (7) is fixedly arranged at the end of the drill rod (4).

3. The tunnel excavation device for the tunnel model test according to claim 2, wherein the cutter head (7) is shaped like a quadrangular pyramid, is provided with four cutting edges, and has a cross-sectional shape.

4. The tunnel model test tunnel excavation device of claim 1, further comprising a lifting drilling machine device (8), wherein the lifting drilling machine device (8) comprises a drilling machine support (801), a lifting mechanism (802) and an electric drilling machine (803), the electric drilling machine (803) can adjust the position of the electric drilling machine (803) up and down along the lifting mechanism (802) and lock the electric drilling machine, and the drill rod (4) is detachably mounted on the electric drilling machine (803) and can provide rotating power for the drill rod (4).

5. The tunnel excavation device for the tunnel model test according to claim 4, wherein the interface of the electric drilling machine (803) is a cross plum blossom interface (804), the end of the drill rod (4) is a cross connecting bolt, and the cross plum blossom interface and the cross connecting bolt are matched to enable the drill rod (4) to be meshed and connected with the electric drilling machine (803).

6. The tunnel excavation device for the tunnel model test according to claim 1, wherein the support cylinder (5) is a circular hollow cylinder body with two unsealed ends, a blade ring (501) is arranged at one end of the hollow cylinder body, a plurality of fixing columns (502) are fixedly arranged on the inner wall of the hollow cylinder body, and the support cylinder (5) is connected with the drill rod (4) in a welding mode through the fixing columns (502).

7. The tunnel excavation device for the tunnel model test according to claim 6, wherein the support cylinder (5) and the drill rod (4) are coaxially arranged, the diameter of the drill rod (4) is 1/3 of the diameter of the support cylinder (5), and the distance between the spiral baffle (6) and the wall of the support cylinder (5) is 1-2 mm.

8. The tunnel excavation device for the tunnel model test of claim 1, wherein the model test box is a steel structure frame and is made of tempered glass.

9. The tunnel model test tunnel excavation device of claim 1, wherein a baffle (3) is arranged at the hole (2) for blocking.

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