CN117005903A - Supporting device and method for tunnel construction - Google Patents

Abstract

The invention relates to the technical field of tunnel construction, in particular to a supporting device for tunnel construction, which comprises two arched girders, wherein a supporting mechanism is arranged between the arched girders, the supporting mechanism comprises two mounting seats, two elastic telescopic girders and a supporting plate, the elastic telescopic girders are hinged with the mounting seats, the supporting plate is provided with a connecting seat, the elastic telescopic girders are hinged with the connecting seat, one arched girder is provided with a positioning groove, the supporting plate is connected with a positioning inserted rod, the arched girders are provided with auxiliary supporting mechanisms, the arched girders are provided with moving wheels, and connecting components are arranged between the arched girders; according to the invention, the two arched girders move close to each other, so that each support plate is abutted against the inner wall of the support tunnel by the hinged transmission of the elastic telescopic girders, the elastic telescopic girders arranged by each support mechanism are adaptively compressed after the inner wall of the tunnel is abutted against the support, and each support mechanism can support the inner wall of the tunnel under the condition that the inner wall of the tunnel is uneven.

Description

Supporting device and method for tunnel construction

Technical Field

The invention belongs to the technical field of tunnel construction, and particularly relates to a supporting device and a method for tunnel construction.

Background

The road construction in the mountain area is an important work of traffic industry in China because the area of China is wide and the mountain area is large, in the traditional construction, the roads are mostly repaired around the mountain, the way makes the turning openings of the roads more and the length of the roads longer, and along with the vigorous development of the road construction technology in China, the road construction is mostly carried out in the existing mountain area by adopting the way of repairing tunnels, so that the roads are straight and the length of the roads is short, and the passing time is greatly shortened.

In tunnel construction, need to support the tunnel of building, current strutting arrangement is mostly fixed arch frame, supports tunnel inner wall through the arch frame, however, tunnel inner wall's building is also not the regular arch completely, and local area can have certain unevenness, and fixed arch frame then can't support this kind of uneven ground, has caused the blind spot of supporting.

Disclosure of Invention

The purpose of the invention is that: aims to provide a supporting device and a supporting method for tunnel construction, which are used for solving the problems in the background technology.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the supporting device for tunnel construction comprises two arched girders, wherein a plurality of supporting mechanisms are arranged between the two arched girders, and the supporting mechanisms are arranged along the circumference of the arched girders in an array manner;

the supporting mechanism comprises two mounting seats, two elastic telescopic beams and a supporting plate, wherein the two mounting seats are fixedly connected with the two arched main beams respectively, one ends of the two elastic telescopic beams are hinged with the two mounting seats respectively, the supporting plate is provided with a connecting seat, and the other ends of the two elastic telescopic beams are hinged with two ends of the connecting seat respectively;

a plurality of positioning grooves are formed in the side face of one arched girder, each positioning groove corresponds to each supporting plate, each supporting plate is fixedly connected with a positioning inserting rod, one end of each positioning inserting rod is fixedly connected with each supporting plate, and the other end of each positioning inserting rod is inserted into each positioning groove;

each arch girder all is provided with auxiliary support mechanism, two the removal wheel is all installed to arch girder bottom, and two arch girder bottom all is provided with the fixed plate, a plurality of locating holes have all been seted up to the fixed plate, two be provided with coupling assembling between the arch girder.

The elastic telescopic beam comprises a first sleeve, a telescopic beam and a first spring, wherein the first sleeve is hinged to the mounting seat, a first sliding block is connected inside the first sleeve in a sliding mode, one end of the telescopic beam is hinged to the connecting seat, the other end of the telescopic beam is fixedly connected with a first sliding rod which penetrates through the first sleeve in a sliding mode, the first sliding rod is fixedly connected with the first sliding block, and the first sliding block is fixedly connected with the first sleeve through the first spring.

A plurality of first mounting grooves are formed in the two arched girders, and the mounting seats are mounted in the first mounting grooves through bolts respectively.

The support plate is further provided with an indicating mechanism, the indicating mechanism comprises an elastic bag, a steel pipe and a second sleeve, the elastic bag is fixedly arranged on one side, away from the arched girder, of the support plate, the steel pipe is arranged on one side, facing the arched girder, of the support plate, one end of the steel pipe is communicated with the elastic bag, the other end of the steel pipe is communicated with one end of the second sleeve, a second sliding block is connected inside the second sleeve in a sliding mode, a second spring is fixedly connected between the second sliding block and the other end of the second sleeve, the second sliding block is fixedly connected with a second sliding rod penetrating through the second sleeve, and an indicating strip is adhered to one side, close to the second sliding rod, of the second sliding rod.

The indicator strip is made of noctilucent materials.

The auxiliary supporting mechanism comprises a supporting frame and a jack, wherein the supporting frame and the jack are symmetrically arranged, the supporting frame is provided with a plurality of supporting beams which extend to be propped against the arched girder, and slotted holes corresponding to the ejector rods of the jack are formed in the bottom of the supporting frame.

The arch girder is provided with a plurality of with supporting beam tip assorted positioning seat, the positioning seat offer with supporting beam assorted second mounting groove, supporting beam tip with pass through bolted connection between the second mounting groove.

Each fixed plate is provided with an inclined open slot, the open end of the inclined open slot is at a higher side, the connecting assembly comprises a connecting rod, the specification of the connecting rod is matched with the inclined open slot, and limiting blocks matched with the two ends of the inclined open slot are fixedly arranged at the two ends of the connecting rod.

The construction method of the supporting device for tunnel construction comprises the following steps:

step (1): the two arched girders are moved to enable the oblique opening grooves of the two arched girders to be matched with the connecting rods, then two ends of the connecting rods are respectively placed into the oblique opening grooves of the fixing plates of the two arched girders, the two arched girders can be connected into a whole through limiting blocks at two ends of the connecting rods, and then each supporting mechanism is arranged between the two arched girders;

step (2): after the arch girder moves to a required position, driving ground nails into positioning holes of fixing plates at two ends of one arch girder to limit, so that one arch girder is fixed with the ground;

step (3): because the other arched girder is not positioned, people can drive the cart to push the other arched girder to enable the two arched girders to approach each other, and because the positioning inserting rod at one end of the support plate is inserted into the positioning groove of one arched girder, the support plate can only move linearly without deflection, when the two arched girders move close to each other, the support plate can move away from the arched girders linearly through the hinged transmission of the two elastic telescopic girders and move towards the inner wall of the tunnel to support the inner wall of the tunnel;

step (4): because the inner wall of the tunnel may not be a regular arch structure, during the hinge transmission of the elastic telescopic beams of each supporting mechanism, part of supporting mechanisms are transmitted through the hinge transmission of the elastic telescopic beams, the supporting plates of the supporting mechanisms are already in abutting joint with the inner wall of the tunnel, while the supporting plates of other supporting mechanisms are not already in abutting joint with the inner wall of the tunnel, so as to ensure that after the two arch main beams continue to move close, part of the supporting plates which are already in supporting connection with the inner wall of the tunnel are in self-adaptive compression after the inner wall of the tunnel is in abutting joint with the inner wall of the tunnel, the elastic telescopic beams enable the first sliding rod and the first sliding block of the telescopic Liang Tuidong to move to the depth of the first sleeve, compress the first springs, and the supporting plates of other supporting mechanisms continue to move to abut against the inner wall of the tunnel, so that each supporting mechanism cannot generate supporting holes due to the fact that the inner wall of the tunnel is not in a regular arch structure;

step (5): until each supporting mechanism even tunnel inner wall butt support after, people can be with the arch girder that promotes according to aforesaid mode, fix with ground through driving in the ground nail, two arch girders can fix with ground this moment, and each supporting mechanism also all is accomplished with tunnel inner wall butt support simultaneously.

Step (6): after the supporting operation is finished, people can detach the two arched girders from the ground by detaching the two arched girders from the ground, then move the two arched girders away from each other, the supporting plates of the supporting mechanisms can be separated from the inner wall of the tunnel under the hinged transmission of the elastic telescopic girders, and people can connect the two arched girders into a whole for transferring in the mode of the step (1).

According to the invention, the two arched girders move close to each other, so that each support plate is abutted against the inner wall of the support tunnel by the hinged transmission of the elastic telescopic girders, the elastic telescopic girders arranged by each support mechanism are adaptively compressed after the inner wall of the tunnel is abutted against the support, and each support mechanism can support the inner wall of the tunnel under the condition that the inner wall of the tunnel is uneven.

Drawings

The invention may be further illustrated by means of non-limiting examples given in the accompanying drawings.

FIG. 1 is a schematic diagram of a first embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic view of a partial cross-sectional structure of a supporting mechanism according to a first embodiment of the present invention;

FIG. 4 is an enlarged schematic view of the structure at B of FIG. 3;

FIG. 5 is an enlarged schematic view of the structure at C of FIG. 4;

the main reference numerals are as follows:

arched girder 100, mobile wheel 1001, fixed plate 1002, positioning hole 1003, first mounting groove 1004, oblique open groove 1005, mount 101, elastic telescoping beam 102, first sleeve 1021, telescoping beam 1022, first spring 1023, first slide block 1024, first slide bar 1025, support plate 103, connection base 1031, positioning plunger 1032, elastic bladder 1033, steel tube 1034, second sleeve 1035, second slide block 1036, second spring 1037, second slide bar 1038, indicator bar 1039, support frame 1041, jack 1042, support beam 1043, positioning base 1051, connecting rod 106, stopper 1061, positioning sleeve 1071, positioning slide bar 1072.

Detailed Description

In order that those skilled in the art will better understand the present invention, the following technical scheme of the present invention will be further described with reference to the accompanying drawings and examples.

Embodiment 1, as shown in fig. 1 to 5, a supporting device for tunnel construction includes two arched girders 100, between which a plurality of supporting mechanisms are installed, the plurality of supporting mechanisms being arranged along a circumferential array of the arched girders 100;

the support mechanism comprises two mounting seats 101, two elastic telescopic beams 102 and a support plate 103, wherein the two mounting seats 101 are fixedly connected with the two arched main beams 100 respectively, one ends of the two elastic telescopic beams 102 are hinged with the two mounting seats 101 respectively, the support plate 103 is provided with a connecting seat 1031, and the other ends of the two elastic telescopic beams 102 are hinged with two ends of the connecting seat 1031 respectively;

a plurality of positioning grooves are formed in the side face of one arched girder 100, each positioning groove corresponds to each support plate 103, each support plate 103 is fixedly connected with a positioning inserting rod 1032, one end of each positioning inserting rod 1032 is fixedly connected with each support plate 103, and the other end of each positioning inserting rod 1032 is inserted into each positioning groove;

the elastic telescopic beam 102 comprises a first sleeve 1021, a telescopic beam 1022 and a first spring 1023, wherein the first sleeve 1021 is hinged with the mounting seat 101, a first slider 1024 is slidably connected inside the first sleeve 1021, one end of the telescopic beam 1022 is hinged with the connecting seat 1031, the other end of the telescopic beam 1022 is fixedly connected with a first sliding rod 1025 which is slidably penetrated into the first sleeve 1021, the first sliding rod 1025 is fixedly connected with the first slider 1024, and the first slider 1024 is fixedly connected with the first sleeve 1021 through the first spring 1023;

each arch girder 100 is provided with an auxiliary supporting mechanism, the bottoms of the two arch girders 100 are provided with moving wheels 1001, the bottoms of the two arch girders 100 are provided with fixing plates 1002, the fixing plates 1002 are provided with a plurality of positioning holes 1003, and a connecting component is arranged between the two arch girders 100;

each fixing plate 1002 is provided with an inclined open slot 1005, the open end of the inclined open slot 1005 is at the higher side, the connecting assembly comprises a connecting rod 106, the specification of the connecting rod 106 is matched with that of the inclined open slot 1005, and limiting blocks 1061 matched with the two ends of the inclined open slot 1005 are fixedly arranged at the two ends of the connecting rod 106.

Each supporting mechanism can be installed between the two arched girders 100, and the inner wall of the tunnel can be supported by each supporting mechanism; the connection seat 1031 of the support plate 103 of the support mechanism is hinged to the two arched girders 100 through two elastic telescopic girders 102, so that when the two arched girders 100 move relatively, the support plate 103 can move, which is specifically described as follows:

because the positioning inserting rod 1032 at one end of the support plate 103 is inserted into the positioning groove of one of the arched girders 100, the support plate 103 can only move linearly without deflection, when the two arched girders 100 move close to each other, the support plate 103 can move away from the arched girders 100 linearly through the hinged transmission of the two elastic telescopic girders 102, when the two arched girders 100 move away from each other, the support plate 103 can move close to the arched girders 100 linearly through the hinged transmission of the two elastic telescopic girders 102, and meanwhile, people can detach the support mechanism between the two arched girders 100 by detaching the two mounting seats 101;

the elastic telescopic beam 102 can elastically expand and contract, and is specifically described as follows:

in the initial state, under the elastic force of the first spring 1023 in the first sleeve 1021, the first slider 1024 is pushed to slide to the end of the first sleeve 1021, so that the first slider 1025 slides out completely, and the telescopic beam 1022 is pushed to extend out completely;

the connection assembly is used to connect two arched girders 100, and is described in detail below:

the two arched girders 100 are moved to enable the oblique opening grooves 1005 of the two arched girders 100 to be matched with the connecting rods 106, and then two ends of the connecting rods 106 are respectively placed into the oblique opening grooves 1005 of the fixing plates 1002 of the two arched girders 100, and the two arched girders 100 can be connected into a whole to carry out transferring movement by the clamping of the limiting blocks 1061 at the two ends of the connecting rods 106; the opening end of the inclined open slot 1005 is at a higher side, so that the connecting rod 106 is positioned at the lower end of the inclined open slot 1005 under the gravity, thereby preventing the connecting rod 106 from falling out of the inclined open slot 1005;

the specific use process is as follows:

(1) the two arched girders 100 are connected into a whole through the connecting rod 106, and each supporting mechanism is arranged between the two arched girders 100, and because the movable wheels 1001 are arranged on the lower sides of the arched girders 100, people can push the two arched girders 100 to move to the position required to support in the tunnel;

(2) after moving to the required position, driving ground nails into positioning holes 1003 of fixing plates 1002 at two ends of one of the arched girders 100 to limit, so that one of the arched girders 100 is fixed with the ground;

(3) because the other arched girder 100 is not positioned, people can drive the cart to push the other arched girder 100, so that the two arched girders 100 are close to each other, and the support plate 103 can move away from the arched girder 100 in a straight line and move towards the inner wall of the tunnel to support the inner wall of the tunnel through the hinged transmission of the two elastic telescopic girders 102;

(4) because the inner wall of the tunnel has the condition of uneven local position, in the hinge transmission process of the elastic telescopic beams 102 of each supporting mechanism, part of supporting mechanisms are in hinge transmission through the elastic telescopic beams 102, the supporting plates 103 of the supporting mechanisms are in abutting joint with the inner wall of the tunnel, but the supporting plates 103 of other supporting mechanisms are not in abutting joint with the inner wall of the tunnel, so as to ensure that the supporting plates 103 which are supported by the inner wall of the tunnel are in self-adaptive compression after the parts of the supporting plates 103 which are supported by the inner wall of the tunnel are in abutting joint with the inner wall of the tunnel along with the continuous movement of the two arched girders 100, so that the telescopic beams 1022 push the first slide bars 1025 and the first slide blocks 1024 to move to the depth of the first sleeves 1021 to compress the first springs 1023, and the supporting plates 103 of other supporting mechanisms are in abutting joint with the inner wall of the tunnel, thereby preventing the supporting mechanisms from being in the condition of uneven local position;

(5) until each supporting mechanism evenly supports the tunnel inner wall butt, people can fix the pushed arch girder 100 with the ground through driving ground nails according to the mode, at the moment, two arch girders 100 can be fixed with the ground, and each supporting mechanism also supports the tunnel inner wall butt.

In this embodiment, the two arched girders 100 move closer to each other, so that the elastic telescopic girders 102 are hinged to each other, so that each supporting plate 103 abuts against the inner wall of the supporting tunnel, and the elastic telescopic girders 102 arranged by each supporting mechanism are compressed in a manner of self-adapting after the inner wall of the tunnel abuts against the supporting tunnel, and when the inner wall of the tunnel is uneven in local position, each supporting mechanism can support the inner wall of the tunnel.

After the supporting operation is completed, people can detach the two arched girders 100 from the ground by detaching the two arched girders 100 from the ground, then move the two arched girders 100 away from each other, and under the hinged transmission of the elastic telescopic girders 102, the supporting plates 103 of the supporting mechanisms can be separated from the inner wall of the tunnel, so that people can connect the two arched girders 100 into a whole for transferring again according to the mode of the step (1).

As a further improvement of this embodiment, as shown in fig. 3 and 5, the support plate 103 is further provided with an indicating mechanism, the indicating mechanism includes an elastic bag 1033, a steel tube 1034 and a second sleeve 1035, the elastic bag 1033 is fixedly disposed on a side of the support plate 103 away from the arched girder 100, the steel tube 1034 is mounted on a side of the support plate 103 facing the arched girder 100, one end of the steel tube 1034 is communicated with the elastic bag 1033, the other end of the steel tube 1034 is communicated with one end of the second sleeve 1035, a second slider 1036 is slidably connected inside the second sleeve 1035, a second spring 1037 is fixedly connected between the second slider 1036 and the other end of the second sleeve 1035, a second slide bar 1038 penetrating through the second sleeve 1035 is fixedly connected to the second slider 1036, and an indicating bar 1039 is adhered on a side of the second slide bar 1038 close to the second slider 1036.

In the initial state, the second slider 1036 slides to the end of the second sleeve 1035 under the elastic force of the second spring 1037, at this time, the second slide bar 1038 is completely retracted into the second sleeve 1035, and the elastic bag 1033 and the steel tube 1034 are filled with liquid, such as water, hydraulic oil, etc.;

in the process that the support plate 103 is in butt joint with the inner wall of the tunnel, the elastic bag 1033 is in butt joint with the inner wall of the tunnel, so that the elastic bag 1033 is extruded, liquid is filled into the second sleeve 1035 through the steel pipe 1034, the second sliding block 1036 is pushed to drive the second sliding rod 1038 to gradually extend out of the second sleeve 1035 through liquid transmission until the elastic bag 1033 is completely flattened, the liquid completely enters the second sleeve 1035, the second sliding rod 1038 completely slides out, and the indication strip 1039 bonded by the second sliding rod 1038 extends out of the second sleeve 1035, so that people are indicated that the support plate 103 is in butt joint with the inner wall of the tunnel.

As a further optimization of this embodiment, as shown in fig. 1, two arched girders 100 are each provided with a plurality of first mounting grooves 1004, each mounting seat 101 is mounted in each first mounting groove 1004 by a bolt, and the indicator strip 1039 is made of noctilucent material.

The mounting seat 101 can be mounted by arranging the first mounting groove 1004, the mounting position of the mounting seat 101 can be calibrated, the indicator strip 1039 is made of luminous materials, and luminous display can be realized under the condition that the visibility of a tunnel is not high, so that people can check conveniently.

As a further optimization of this embodiment, as shown in fig. 1, the auxiliary supporting mechanism includes a supporting frame 1041 and a jack 1042, which are symmetrically arranged, the supporting frame 1041 is provided with a plurality of supporting beams 1043 extending to be abutted against the arched girder 100, and slots corresponding to the ejector rods of the jack 1042 are formed at the bottom of the supporting frame 1041;

the arched girder 100 is provided with a plurality of positioning seats 1051 matched with the end parts of the supporting beams 1043, the positioning seats 1051 are provided with second mounting grooves matched with the supporting beams 1043, and the end parts of the supporting beams 1043 are fixedly connected with the second mounting grooves through bolts.

The second mounting groove of the positioning seat 1051 can correspond to each supporting beam 1043 of the supporting frame 1041, the end parts of the supporting beams 1043 and the positioning seat 1051 can be stably fixed through bolts, and then the supporting beams are inserted into the slotted holes in the bottom of the supporting frame 1041 through the ejector rods of the jacks 1042, so that the supporting frame 1041 is supported, and the arched girder 100 can be supported.

As a further optimization of this embodiment, as shown in fig. 1, one of the arched girders 100 is further provided with a plurality of positioning sleeves 1071, and the other arched girder 100 is further provided with a plurality of positioning slide bars 1072 matching the positioning sleeves 1071.

When the two arched girders 100 are connected into a whole, the two arched girders 100 can be aligned quickly by mutually matching each positioning sleeve 1071 with each positioning slide rod 1072, so that the connection operation is convenient.

Embodiment 2 provides a construction method of a supporting device for tunnel construction based on the basis of embodiment 1, wherein the specific construction method comprises the following steps:

step (1): moving the two arched girders 100, matching the two arched girders 100 with each other through each positioning sleeve 1071 and each positioning slide bar 1072, so that the two arched girders 100 are aligned quickly, matching the inclined open grooves 1005 of the two arched girders 100 with the connecting rods 106, then respectively placing the two ends of the connecting rods 106 into the inclined open grooves 1005 of the fixing plates 1002 of the two arched girders 100, and clamping the two arched girders 100 into a whole through the limiting blocks 1061 at the two ends of the connecting rods 106, and then installing each supporting mechanism between the two arched girders 100, wherein as the movable wheels 1001 are arranged at the lower sides of the arched girders 100, people can push the two arched girders 100 to move to the positions required to be supported in the tunnel;

step (2): after moving to the required position, driving ground nails into positioning holes 1003 of fixing plates 1002 at two ends of one of the arched girders 100 to limit, so that one of the arched girders 100 is fixed with the ground;

step (3): because the other arched girder 100 is not positioned, a user can drive the cart to push the other arched girder 100 so that the two arched girders 100 are close to each other, and because the positioning inserting rod 1032 at one end of the supporting plate 103 is inserted into the positioning groove of one arched girder 100, the supporting plate 103 can only move linearly without deflection, when the two arched girders 100 move close to each other, the supporting plate 103 can move away from the arched girder 100 linearly through the hinged transmission of the two elastic telescopic girders 102 and move towards the inner wall of the tunnel so as to support the inner wall of the tunnel;

step (4): because the inner wall of the tunnel may not be a regular arch structure, during the hinge transmission of the elastic telescopic beams 102 of each supporting mechanism, part of the supporting mechanisms are transmitted by the hinge of the elastic telescopic beams 102, the supporting plates 103 of the supporting mechanisms are already in abutting connection with the inner wall of the tunnel, but the supporting plates 103 of the other supporting mechanisms are not already in abutting connection with the inner wall of the tunnel, so as to enable the two arch main beams 100 to move closer together, and after part of the supporting plates 103 which are already in supporting connection with the inner wall of the tunnel are in abutting connection with the inner wall of the tunnel, the elastic telescopic beams 102 are compressed in a self-adaptive manner, so that the telescopic beams 1022 push the first sliding rods 1025 and the first sliding blocks 1024 to move deep into the first sleeves 1021 to compress the first springs 1023, and the supporting plates 103 of the other supporting mechanisms are continuously in abutting connection with the inner wall of the tunnel, thereby preventing the supporting mechanisms from having supporting holes caused by uneven local positions of the inner wall of the tunnel;

step (5): until each supporting mechanism evenly supports the tunnel inner wall butt, people can fix the pushed arch girder 100 with the ground through driving ground nails according to the mode, at the moment, two arch girders 100 can be fixed with the ground, and each supporting mechanism also supports the tunnel inner wall butt.

Step (6): after the supporting operation is completed, people can detach the two arched girders 100 from the ground by detaching the two arched girders 100 from the ground, then move the two arched girders 100 away from each other, and under the hinged transmission of the elastic telescopic girders 102, the supporting plates 103 of the supporting mechanisms can be separated from the inner wall of the tunnel, so that people can connect the two arched girders 100 into a whole for transferring again according to the mode of the step (1).

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims of this invention, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the invention disclosed herein.

Claims (9)

1. The utility model provides a supporting device for tunnel construction, includes two arch girders, its characterized in that: a plurality of supporting mechanisms are arranged between the two arched girders, and the supporting mechanisms are arranged along the circumference of the arched girders in an array manner;

the supporting mechanism comprises two mounting seats, two elastic telescopic beams and a supporting plate, wherein the two mounting seats are fixedly connected with the two arched main beams respectively, one ends of the two elastic telescopic beams are hinged with the two mounting seats respectively, the supporting plate is provided with a connecting seat, and the other ends of the two elastic telescopic beams are hinged with two ends of the connecting seat respectively;

a plurality of positioning grooves are formed in the side face of one arched girder, each positioning groove corresponds to each supporting plate, each supporting plate is fixedly connected with a positioning inserting rod, one end of each positioning inserting rod is fixedly connected with each supporting plate, and the other end of each positioning inserting rod is inserted into each positioning groove;

each arch girder all is provided with auxiliary support mechanism, two the removal wheel is all installed to arch girder bottom, and two arch girder bottom all is provided with the fixed plate, a plurality of locating holes have all been seted up to the fixed plate, two be provided with coupling assembling between the arch girder.

2. The supporting device for tunnel construction according to claim 1, wherein: the elastic telescopic beam comprises a first sleeve, a telescopic beam and a first spring, wherein the first sleeve is hinged to the mounting seat, a first sliding block is connected inside the first sleeve in a sliding mode, one end of the telescopic beam is hinged to the connecting seat, the other end of the telescopic beam is fixedly connected with a first sliding rod which penetrates through the first sleeve in a sliding mode, the first sliding rod is fixedly connected with the first sliding block, and the first sliding block is fixedly connected with the first sleeve through the first spring.

3. The supporting device for tunnel construction according to claim 2, wherein: a plurality of first mounting grooves are formed in the two arched girders, and the mounting seats are mounted in the first mounting grooves through bolts respectively.

4. A supporting device for tunnel construction according to claim 3, wherein: the support plate is further provided with an indicating mechanism, the indicating mechanism comprises an elastic bag, a steel pipe and a second sleeve, the elastic bag is fixedly arranged on one side, away from the arched girder, of the support plate, the steel pipe is arranged on one side, facing the arched girder, of the support plate, one end of the steel pipe is communicated with the elastic bag, the other end of the steel pipe is communicated with one end of the second sleeve, a second sliding block is connected inside the second sleeve in a sliding mode, a second spring is fixedly connected between the second sliding block and the other end of the second sleeve, the second sliding block is fixedly connected with a second sliding rod penetrating through the second sleeve, and an indicating strip is adhered to one side, close to the second sliding rod, of the second sliding rod.

5. The supporting device for tunnel construction according to claim 4, wherein: the indicator strip is made of noctilucent materials.

6. The supporting device for tunnel construction according to claim 5, wherein: the auxiliary supporting mechanism comprises a supporting frame and a jack, wherein the supporting frame and the jack are symmetrically arranged, the supporting frame is provided with a plurality of supporting beams which extend to be propped against the arched girder, and slotted holes corresponding to the ejector rods of the jack are formed in the bottom of the supporting frame.

7. The supporting device for tunnel construction according to claim 6, wherein: the arch girder is provided with a plurality of with supporting beam tip assorted positioning seat, the positioning seat offer with supporting beam assorted second mounting groove, supporting beam tip with pass through bolted connection between the second mounting groove.

8. The supporting device for tunnel construction according to claim 7, wherein: each fixed plate is provided with an inclined open slot, the open end of the inclined open slot is at a higher side, the connecting assembly comprises a connecting rod, the specification of the connecting rod is matched with the inclined open slot, and limiting blocks matched with the two ends of the inclined open slot are fixedly arranged at the two ends of the connecting rod.

9. A construction method of a support device for tunnel construction, comprising the support device for tunnel construction according to any one of claims 1 to 8, characterized in that: the construction method comprises the following steps:

step (1): the two arched girders are moved to enable the oblique opening grooves of the two arched girders to be matched with the connecting rods, then two ends of the connecting rods are respectively placed into the oblique opening grooves of the fixing plates of the two arched girders, the two arched girders can be connected into a whole through limiting blocks at two ends of the connecting rods, and then each supporting mechanism is arranged between the two arched girders;

step (2): after the arch girder moves to a required position, driving ground nails into positioning holes of fixing plates at two ends of one arch girder to limit, so that one arch girder is fixed with the ground;

step (3): because the other arched girder is not positioned, people can drive the cart to push the other arched girder to enable the two arched girders to approach each other, and because the positioning inserting rod at one end of the support plate is inserted into the positioning groove of one arched girder, the support plate can only move linearly without deflection, when the two arched girders move close to each other, the support plate can move away from the arched girders linearly through the hinged transmission of the two elastic telescopic girders and move towards the inner wall of the tunnel to support the inner wall of the tunnel;

step (4): because the inner wall of the tunnel may not be a regular arch structure, during the hinge transmission of the elastic telescopic beams of each supporting mechanism, part of supporting mechanisms are transmitted through the hinge transmission of the elastic telescopic beams, the supporting plates of the supporting mechanisms are already in abutting joint with the inner wall of the tunnel, while the supporting plates of other supporting mechanisms are not already in abutting joint with the inner wall of the tunnel, so as to ensure that after the two arch main beams continue to move close, part of the supporting plates which are already in supporting connection with the inner wall of the tunnel are in self-adaptive compression after the inner wall of the tunnel is in abutting joint with the inner wall of the tunnel, the elastic telescopic beams enable the first sliding rod and the first sliding block of the telescopic Liang Tuidong to move to the depth of the first sleeve, compress the first springs, and the supporting plates of other supporting mechanisms continue to move to abut against the inner wall of the tunnel, so that each supporting mechanism cannot generate supporting holes due to the fact that the inner wall of the tunnel is not in a regular arch structure;

step (5): until each supporting mechanism even tunnel inner wall butt support after, people can be with the arch girder that promotes according to aforesaid mode, fix with ground through driving in the ground nail, two arch girders can fix with ground this moment, and each supporting mechanism also all is accomplished with tunnel inner wall butt support simultaneously.

Step (6): after the supporting operation is finished, people can detach the two arched girders from the ground by detaching the two arched girders from the ground, then move the two arched girders away from each other, the supporting plates of the supporting mechanisms can be separated from the inner wall of the tunnel under the hinged transmission of the elastic telescopic girders, and people can connect the two arched girders into a whole for transferring in the mode of the step (1).