CN113107535B - Tunnel inverted arch temporary support dismantling and replacing method - Google Patents
Tunnel inverted arch temporary support dismantling and replacing method Download PDFInfo
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- CN113107535B CN113107535B CN202110407096.3A CN202110407096A CN113107535B CN 113107535 B CN113107535 B CN 113107535B CN 202110407096 A CN202110407096 A CN 202110407096A CN 113107535 B CN113107535 B CN 113107535B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/381—Setting apparatus or devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to the technical field of underground engineering, in particular to a tunnel inverted arch temporary support dismantling and replacing method, which comprises the following steps: step 1: arranging a connecting piece on the vertical temporary support; and 2, step: cutting off the vertical temporary supports below the connecting pieces, forming mounting windows between the vertical temporary supports and the tunnel wall, and connecting two ends of each connecting piece with the vertical temporary supports on two sides of each mounting window respectively; and step 3: paving a waterproof layer on the tunnel wall in the mounting window; and 4, step 4: and a supporting part is arranged between the waterproof layer and the connecting piece. Before cutting vertical temporary support, the vertical temporary support bearing force that sets up the connecting piece in advance for will cut for the structure in tunnel still can keep stable in structure when vertical temporary support part is cut, is guaranteeing to construct under the safe circumstances, has formed the installation window between vertical temporary support and the tunnel wall, and the waterproof performance in tunnel is guaranteed in the smooth construction of the waterproof layer of being convenient for.
Description
Technical Field
The invention relates to the technical field of underground engineering, in particular to a method for replacing an inverted arch temporary support of a tunnel.
Background
With the acceleration of the urbanization process and the continuous expansion of the urban scale, the connection between each region of the city and each region is becoming more and more compact, and the traffic jam phenomenon often occurs due to the proportion of the urban road area in the urban area. The subway is taken as a modern traffic mode, and becomes one of effective measures for improving an urban traffic system gradually by the design concept of convenience, rapidness and environmental protection and the operation mode of high efficiency, safety and punctuality.
In the construction of subway tunnel, big section cavern sets up vertical interim support subtracting usually, and vertical interim support includes a plurality of supporting beam that the in bank evenly set up, realizes tunnel structure's support, reduces the probability that the tunnel collapses, but the waterproof layer need be laid to the tunnel invert, because the interval between the supporting beam is less than the width of waterproof board, vertical interim support has caused the interference to the construction of waterproof layer, makes the waterproof layer construction receive the influence, the condition of percolating water easily appears.
Therefore, a technical scheme is needed at present to solve the problem that the vertical temporary support of the tunnel causes interference to the construction of the waterproof layer, and under the condition that the vertical temporary support cannot be detached, the construction of the waterproof layer is affected, and the tunnel is easy to have the water leakage phenomenon.
Disclosure of Invention
The invention aims to: the tunnel inverted arch temporary support dismantling and replacing method is provided for solving the technical problems that in the prior art, the vertical temporary support of a tunnel interferes with the construction of a waterproof layer, the construction of the waterproof layer is affected under the condition that the vertical temporary support cannot be dismantled, and the water leakage phenomenon easily occurs in the tunnel.
In order to achieve the purpose, the invention adopts the technical scheme that:
the tunnel inverted arch temporary support dismantling and replacing method comprises the following steps:
step 1: arranging a connecting piece on the vertical temporary support;
step 2: cutting off the vertical temporary supports below the connecting pieces, forming installation windows between the vertical temporary supports and the tunnel wall, and connecting two ends of each connecting piece with the vertical temporary supports on two sides of each installation window respectively;
and step 3: paving a waterproof layer on the tunnel wall in the mounting window;
and 4, step 4: and a supporting part is arranged between the waterproof layer and the connecting piece.
The invention relates to a method for replacing an inverted arch temporary support of a tunnel,
arranging a connecting piece on a vertical temporary support to be cut off;
the vertical temporary support between the connecting piece and the tunnel wall is cut off, so that an installation window is formed between the vertical temporary support and the tunnel wall, the length of the connecting piece is greater than the span of the installation window, and two ends of the connecting piece are respectively connected and fixed with the vertical temporary support which is not cut off, so that the connecting piece is used as a force bearing part of the vertical temporary support which is cut off, and the supporting effect of the vertical temporary support on the tunnel is ensured;
because the vertical temporary supports are partially cut off, an installation window is formed between the tunnel wall and the vertical temporary supports, so that the waterproof layer on the tunnel wall can be smoothly laid;
after the waterproof layer is laid, the supporting parts are arranged on the waterproof layer and the connecting piece, the supporting capability of the vertical temporary support is restored again, and the stability of the tunnel structure is ensured;
further, before cutting vertical temporary support, the preset connecting piece is the vertical temporary support bearing force to be cut, so that the structure of the tunnel can still keep stable structure when the vertical temporary support part is cut, and under the condition of ensuring construction safety, an installation window is formed between the vertical temporary support and the tunnel wall, so that the waterproof layer can be smoothly constructed, and the waterproof performance of the tunnel is ensured.
As a preferable scheme of the present invention, the step 1 further includes setting monitoring points on the vertical temporary supports, and collecting initial values of sedimentation deformation of the monitoring points. The initial value of the settlement deformation refers to the position information of the monitoring points, and the settlement deformation of the tunnel wall is calculated through the position change of the monitoring points, so that the deformation of the tunnel can be monitored, the probability of collapse of the tunnel is reduced, and the construction safety is improved.
As a preferable scheme of the invention, in the step 2, each support beam of the vertical temporary support is sequentially dismantled in a manner of cutting one support beam by one, and the settlement deformation of the monitoring point is recorded when each support beam is cut. Vertical interim support is as tunnel structure's protection, and its each supporting beam all is the spandrel girder in tunnel, cuts the deformation that each supporting beam all monitored the tunnel through the position change of monitoring point, reduces the probability that the tunnel takes place to collapse.
As a preferable scheme of the present invention, in the step 1, the connecting member includes a first connecting member and a second connecting member, and the first connecting member and the second connecting member are respectively disposed at two sides of the vertical temporary support. The two sides of the vertical temporary support are supported by the connecting pieces, the supporting effect is better, and the stability of the tunnel structure is improved.
As a preferable scheme of the present invention, a first installation groove is provided at one side of the vertical temporary support, the first connecting member is disposed in the first installation groove, a second installation groove is provided at the other side of the vertical temporary support corresponding to the first installation groove, and the second connecting member is disposed in the second installation groove. Make first connecting piece and second connecting piece all imbed in vertical interim supporting, make first connecting piece and second connecting piece more stable with being connected of vertical interim support, the load effect is better.
As a preferable aspect of the present invention, the connecting member is horizontally disposed. The vertical temporary support that is cut off sets up on the connecting piece, and the connecting piece level sets up and makes the connecting piece both sides atress even, is favorable to the stable in structure of connecting piece, avoids appearing the condition that the connecting piece unilateral drops.
As a preferable embodiment of the present invention, in the step 3, before the waterproof layer is laid, leveling construction is performed on the tunnel wall. The waterproof layer is better attached to the tunnel wall, the waterproof performance of the waterproof layer is improved, and the probability of water leakage is reduced.
As a preferable aspect of the present invention, the leveling work includes applying mortar on the tunnel wall. The tunnel wall is free of sharp edges and corners, the mortar plastering process is mature, the flatness of the tunnel wall can be effectively improved, the waterproof layer is favorably installed, and the waterproof performance of the tunnel is improved.
As a preferred scheme of the invention, the supporting part comprises a plurality of supporting rods, and after the waterproof layer is laid, the plurality of supporting rods are arranged between the waterproof layer and the connecting piece. The supporting capability of the vertical temporary support is recovered, the stability of the tunnel structure is ensured, and the safety in the construction process is improved.
As a preferable scheme of the invention, the method further comprises the following steps of 5: and pouring an inverted arch of the tunnel on the waterproof layer, and arranging a reinforcing component between the inverted arch and the connecting piece. Continue to encrypt the support between tunnel wall and the connecting piece after the tunnel invert is pour and is accomplished, improve the connecting piece to the load effect of being cut vertical temporary stay, improve tunnel structure's stability, carry out stiffening element's setting again after the invert is pour simultaneously for the invert is pour and is not received stiffening element's interference, and it is more convenient to be under construction.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the invention, before the vertical temporary support is cut off, the connecting piece is preset as the vertical temporary support bearing force to be cut off, so that the structure of the tunnel can still keep stable when the vertical temporary support part is cut off, and under the condition of ensuring the construction safety, an installation window is formed between the vertical temporary support and the tunnel wall, thereby facilitating the smooth construction of a waterproof layer and ensuring the waterproof performance of the tunnel.
Drawings
FIG. 1 is a construction flow chart of the tunnel inverted arch temporary support dismantling and replacing method of the invention;
FIG. 2 is a cross-sectional view of a tunnel;
FIG. 3 is a process diagram of constructing a connection;
FIG. 4 is a process diagram of a truncated vertical temporary support;
fig. 5 is a diagram of a process of laying a waterproof layer;
FIG. 6 is a diagram of a process for casting an inverted arch;
FIG. 7 is a view showing a process of providing a reinforcing member in an inverted arch;
FIG. 8 is a schematic view of the installation of the connector on a vertical temporary support;
fig. 9 is a flowchart of a temporary support dismantling and replacing method for an inverted arch of a tunnel according to the present invention in practical construction in embodiment 5;
the labels in the figure are: 1-tunnel wall, 2-waterproof layer, 3-inverted arch, 4-vertical temporary support, 41-first groove, 42-second groove, 5-connecting piece, 51-first connecting piece, 52-second connecting piece, 6-installation window, 7-supporting part, 8-reinforcing part and 9-height test steel bar.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the method for replacing the temporary support for the inverted arch of the tunnel according to the present embodiment includes the following steps:
step 1: according to the span of a shallow-buried underground excavated subway station, the distance between steel pipe piles, the thickness of a station top covering layer and the bearing load of a temporary support, determining the longitudinal section length of an inverted arch lining and the position of a construction joint through comprehensive analysis, wherein the section length is usually the distance between two steel pipe piles, the construction joint is arranged at the 1/4-1/5 span away from the steel pipe pile, a connecting piece 5 is arranged on the vertical temporary support 4 after the section, namely the connecting piece 5 is arranged on the vertical temporary support 4 to be cut off, and the length of the connecting piece 5 needs to be greater than the length of a waterproof plate of a waterproof layer 2 so as to facilitate the laying of the waterproof layer 2;
the connecting piece 5 is horizontally arranged, the vertical temporary support 4 to be cut off is arranged on the connecting piece 5, and the connecting piece 5 is horizontally arranged, so that the two sides of the connecting piece 5 are uniformly stressed, the structural stability of the connecting piece 5 is facilitated, and the condition that the connecting piece 5 falls off from one side is avoided;
the distance between the connecting piece 5 and the ground of the inverted arch 3 to be poured is more than 1m and less than 2m, so that the laying of the waterproof layer 2 and the pouring of the inverted arch 3 have enough construction space;
the connecting piece 5 is made of I22 steel and is connected with the vertical temporary support 4 in a welding mode.
Step 2: cut vertical interim support 4 of connecting piece 5 below, form installation window 6 between vertical interim support 4 and tunnel wall 1, the both ends of connecting piece 5 respectively with the vertical interim support 4 of installation window 6 both sides is connected, cuts vertical interim support 4 between connecting piece 5 and the tunnel wall 1, makes and forms installation window 6 between vertical interim support 4 and the tunnel wall 1, and the length of connecting piece 5 is greater than the span of installation window 6, and the both ends of connecting piece 5 are connected fixedly with vertical interim support 4 that does not cut respectively, makes connecting piece 5 as the bearing part who is cut vertical interim support 4, ensures the supporting role of vertical interim support 4 to the tunnel.
And step 3: paving a waterproof layer 2 on the tunnel wall 1 in the installation window 6, and forming the installation window 6 between the tunnel wall 1 and the vertical temporary supports 4 due to the fact that the vertical temporary supports 4 are partially cut off, so that the waterproof layer 2 on the tunnel wall 1 can be smoothly paved;
before the waterproof layer 2 is laid, leveling construction is carried out on the tunnel wall 1, so that the waterproof layer 2 is better attached to the tunnel wall 1, the waterproof performance of the waterproof layer 2 is improved, and the probability of water leakage is reduced; specifically, the leveling construction comprises the step of plastering mortar on the tunnel wall 1, so that no sharp edges and corners exist on the tunnel wall 1, the mortar plastering process is mature, the flatness of the tunnel wall 1 can be effectively improved, the waterproof layer 2 is favorably installed, and the waterproof performance of the tunnel is improved.
And 4, step 4: a supporting part 7 is arranged between the waterproof layer 2 and the connecting piece 5, after the waterproof layer 2 is laid, the supporting part 7 is arranged between the waterproof layer 2 and the connecting piece 5, the supporting capability of the vertical temporary support 4 is restored again, and the stability of the tunnel structure is ensured;
specifically, the supporting part 7 comprises a plurality of supporting rods, and after the waterproof layer 2 is laid, the plurality of supporting rods are arranged between the waterproof layer 2 and the connecting piece 5, so that the supporting capability of the vertical temporary support 4 is restored, the stability of the tunnel structure is ensured, and the safety in the construction process is improved;
laying three-layer geotechnological cloth protection waterproof layer 2 on waterproof layer 2 surface, setting up the bracing piece according to 1.5-2m interval on waterproof layer 2, the bracing piece welds with connecting piece 5, ensures that the load of vertical interim support 4 effectively transmits to waterproof layer 2 on.
The vertical temporary supports 4, the reinforcing rods and the supporting rods are all steel structural members.
Example 2
As shown in fig. 3, in this embodiment, the difference from embodiment 1 is that step 1 further includes setting monitoring points on the vertical temporary supports 4, and collecting initial sedimentation deformation values of the monitoring points, where the initial sedimentation deformation values refer to position information of the monitoring points, and the sedimentation deformation of the tunnel is calculated according to the position change of the monitoring points, so that the deformation of the tunnel can be monitored, the probability of collapse of the tunnel is reduced, and the safety of construction is improved.
Specifically, height test reinforcing steel bars 9 are bound on monitoring points of the vertical temporary supports 4, and the position change of the height test reinforcing steel bars 9 is measured through a total station, so that the settlement deformation of the tunnel is obtained.
Furthermore, each supporting beam of the vertical temporary support 4 is sequentially detached in the step 2 in a mode of cutting one supporting beam by one supporting beam, the settlement deformation of the monitoring point is recorded when each supporting beam is cut, the vertical temporary support is used for protecting the tunnel structure, each supporting beam is a bearing beam of the tunnel, each cut supporting beam monitors the deformation of the tunnel through the position change of the monitoring point, and the probability of collapse of the tunnel is reduced.
Example 3
As shown in fig. 8, in this embodiment, the difference from embodiment 1 is that in step 1, the connecting member 5 includes a first connecting member 51 and a second connecting member 52, and the first connecting member 51 and the second connecting member 52 are respectively disposed on two sides of the vertical temporary support 4, so that two sides of the vertical temporary support 4 are both supported by the connecting member 5, the supporting effect is better, and the stability of the tunnel structure is improved;
the first connecting piece and the second connecting piece are both made of I22 section steel and are connected with the vertical temporary support 4 in a welding mode;
further, a first installation groove 41 is formed in one side of the vertical temporary support 4, the first connecting piece 51 is arranged in the first installation groove 41, and the first connecting piece 51 is welded to the upper side and the lower side of the first installation groove 41 respectively;
correspond at vertical interim opposite side that supports 4 first mounting groove 41 sets up second mounting groove 42, second connecting piece 52 sets up in the second mounting groove 42, and second connecting piece 52 welds with the upper and lower both sides of second mounting groove 42 respectively for first connecting piece 51 and second connecting piece 52 all imbed in vertical interim supports 4, make first connecting piece 51 and second connecting piece 52 more stable with being connected of vertical interim support 4, and the load effect is better.
Example 4
As shown in fig. 6 and 7, the present embodiment is different from the present embodiment in that the present embodiment further includes step 5: pour tunnel invert 3 on waterproof layer 2, set up reinforcement member 8 between invert 3 and connecting piece 5, continue to encrypt the support between tunnel wall and the connecting piece 5 after tunnel invert 3 is pour and is accomplished, improve connecting piece 5 and to being cut the bearing effect of vertical temporary support 4, improve tunnel structure's stability, invert 3 pours the setting of carrying out reinforcement member 8 again after accomplishing simultaneously, make invert 3 pour and do not receive reinforcement member 8's interference, it is more convenient to construct.
Specifically, the reinforcing member 8 includes a plurality of reinforcing rods.
Example 5
As shown in fig. 9, the method for replacing and dismantling an inverted arch temporary support of a tunnel in this embodiment is further described by taking a specific construction project as an example, and specifically includes the following steps:
firstly, determining the segmental position of an inverted arch lining, and arranging monitoring points on a vertical temporary support
Comprehensively analyzing and determining the length of an inverted arch lining longitudinal segment and the position of a construction joint according to the span of a shallow-buried underground excavation subway station, the distance between steel pipe columns, the thickness of a station top covering layer and the temporary support bearing load; the segmentation length is two steel pipe pile intervals usually, and the construction joint sets up in 1/4 ~ 1/5 span apart from the steel pipe pile.
And laying settlement deformation monitoring points at the temporary support positions for the sectional demolition and replacement of the inverted arch of the station, and collecting initial values before the sectional demolition and replacement.
Welding horizontal I-steel on vertical temporary support of second and inverted arch
And welding horizontal I22a section steel for two times on the vertical temporary support corresponding to the height of 1m from the top surface of the secondary lining concrete of the inverted arch, wherein the length of the section steel exceeds the sectional pouring length of the lining of the inverted arch, and the distance between two sides of the section steel exceeds the length of 2 steel frames and is more than the length of the two sides of the section steel, so that the stability of the two sides of the horizontal I-steel welded on the vertical temporary support is ensured.
Specifically, 1/2 width is firstly cut off on one side of the vertical temporary support, the flange plate of the horizontal I22a I-steel is installed to enter the vertical I-steel cutting position, and then the upper flange plate and the lower flange plate of the horizontal I-steel are firmly welded with the upper side and the lower side of the vertical temporary support cutting position. And then, horizontally replacing the working steel on the other side of the vertical temporary support in the same way.
Thirdly, dismantling the vertical temporary supports in sections within the range of the length of the inverted arch secondary lining sections
And (3) determining the length of the vertical temporary support dismantling replacement segment by combining monitoring data analysis, and under the normal condition, dismantling the vertical support in a segmented manner according to the framing width of the waterproof board, wherein the width of the waterproof board is generally 2 m.
And cutting off the 1 st vertical temporary support from one end of the sectional casting inverted arch from the welded horizontal I-steel under the monitoring and measuring of the reinforced temporary support, monitoring the deformation of the reinforced vertical temporary support, and gradually pushing and cutting off the 2 nd and 3 rd vertical temporary supports under the condition that the deformation is controlled until the width of laying a waterproof plate is met.
Fourthly, processing the primary support base surface of the cut temporary support position on the inverted arch and laying a waterproof layer
And plastering the vertical temporary supporting positions on the inverted arch by adopting mortar in a sectional dismantling manner to ensure that the surface is smooth and has no sharp edges, and paving an inverted arch waterproof layer in a width-divided manner after the inverted arch base surface is qualified.
Fifthly, vertical temporary support is restored on the waterproof layer
According to monitoring data feedback information, generally according to 1.5 ~ 2m interval restore the level on having laid the waterproof layer and replace the vertical temporary support in steel below, restore vertical temporary support before the installation and will correspond and lay 3 layers of geotechnological cloth protective layer on the invert waterproof layer earlier, at the steel sheet that vertical support bottom welding thickness is not less than 10mm, the steel sheet size is 25 cm's square. The bottom of the vertical temporary support below the horizontal replacement steel is compacted with the geotextile protective layer, the top of the vertical temporary support is firmly welded with the horizontal replacement steel, and the vertical load is effectively transmitted to the invert base surface.
And continuously removing the vertical temporary supports below the horizontal replacement steel in a segmented mode forwards according to the requirements of the one-step to three-step mode, paving waterproof layers in a framing mode, and restoring the vertical temporary supports in a segmented mode.
The segment removal substitution length typically does not exceed 8 m.
Sixthly, installing inverted arch reinforcing steel bars and pouring concrete, and installing vertical temporary steel supports on the inverted arches
And after the temporary support dismantling replacement length of the inverted arch meets the requirement of sectional pouring of the inverted arch length, the inverted arch steel bars are installed to pour the inverted arch concrete.
After the inverted arch concrete is poured, according to the monitoring measurement data, when the next section of vertical temporary support is dismantled in a subsection mode, the vertical supports can be restored at the top face of the poured inverted arch concrete at intervals.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The tunnel inverted arch temporary support dismantling and replacing method is characterized by comprising the following steps:
step 1: comprehensively analyzing and determining the length of an inverted arch lining longitudinal section and the position of a construction joint according to the span of a shallow-buried underground excavation subway station, the distance between steel pipe columns, the thickness of a station top covering layer and the bearing load of a temporary support, and arranging a connecting piece (5) on the vertical temporary support (4) after the section, wherein the connecting piece (5) is horizontally arranged;
and 2, step: cutting off the vertical temporary supports (4) below the connecting pieces (5), forming a mounting window (6) between the vertical temporary supports (4) and the tunnel wall (1), and connecting two ends of each connecting piece (5) with the vertical temporary supports (4) on two sides of the mounting window (6) respectively;
and step 3: paving a waterproof layer (2) on the tunnel wall (1) in the mounting window (6);
and 4, step 4: a supporting part (7) is arranged between the waterproof layer (2) and the connecting piece (5).
2. The tunnel invert temporary support dismantling substitution method according to claim 1, characterized by the fact that said step 1 also comprises the setting of monitoring points on the vertical temporary supports (4) and the collection of initial values of the settlement deformation of the monitoring points.
3. The tunnel invert temporary support dismantling substitution method as claimed in claim 2, characterized in that in step 2, each support beam of the vertical temporary support (4) is dismantled in turn in a manner of cutting one support beam by one, and the settlement deformation of the monitoring point is recorded when each support beam is cut.
4. The tunnel invert temporary support dismantling substitution method according to claim 1, characterized in that in said step 1, said connecting means (5) comprise a first connecting means (51) and a second connecting means (52), said first connecting means (51) and second connecting means (52) being respectively arranged on both sides of the vertical temporary support (4).
5. The tunnel invert temporary support dismantling substitution method according to claim 4, characterized in that a first installation groove (41) is provided at one side of the vertical temporary support (4), said first connecting member (51) is provided in said first installation groove (41), a second installation groove (42) is provided corresponding to said first installation groove (41) at the other side of the vertical temporary support (4), said second connecting member (52) is provided in said second installation groove (42).
6. The method for the temporary support dismantling replacement of an inverted arch of a tunnel according to claim 1, wherein in step 3, the tunnel wall (1) is leveled before the waterproof layer (2) is laid.
7. Method for the temporary support demolition of the inverted arch of a tunnel according to claim 6, characterized in that said levelling work comprises the application of mortar plastering on the tunnel walls (1).
8. The method for replacing a temporary support for an inverted arch of a tunnel according to claim 1, wherein the support member (7) comprises a plurality of support rods, and after the waterproof layer (2) is laid, the plurality of support rods are arranged between the waterproof layer (2) and the connecting member (5).
9. The method for replacing an inverted arch temporary support for a tunnel according to any one of claims 1 to 8, further comprising the step of 5: an inverted arch (3) of the tunnel is poured on the waterproof layer (2), and a reinforcing component (8) is arranged between the inverted arch (3) and the connecting piece (5).
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