CN112554908A

CN112554908A - Reinforcing device for shield tunnel of soft soil foundation and using method

Info

Publication number: CN112554908A
Application number: CN202011446709.6A
Authority: CN
Inventors: 张琼方; 娄亚东; 何绍衡
Original assignee: Individual
Current assignee: Hangzhou Metro Group Co ltd; PowerChina Huadong Engineering Corp Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-03-26
Anticipated expiration: 2040-12-09
Also published as: CN112554908B

Abstract

The invention belongs to the technical field of soft soil foundation construction, and particularly relates to a reinforcing device for a soft soil foundation shield tunnel, wherein the soft soil foundation shield tunnel comprises tunnel segments, the tunnel segments are formed by splicing six spliced segments, each spliced segment comprises a spliced inner wall, a foam reinforcing layer and a spliced outer wall, and the foam reinforcing layer is arranged between the spliced inner wall and the spliced outer wall; the reinforcing device is arranged at the splicing position of the spliced segments and comprises a reinforcing connecting rod, a reinforcing sliding rod, a reinforcing transverse rod and a connecting shaft fixing arm, the lower portion of the reinforcing connecting rod is fixedly connected with the top end of the reinforcing sliding rod, and the bottom end of the reinforcing sliding rod is connected with the reinforcing transverse rod.

Description

Reinforcing device for shield tunnel of soft soil foundation and using method

Technical Field

The invention belongs to the technical field of soft soil foundation construction, and particularly relates to a reinforcing device for a shield tunnel of a soft soil foundation and a using method.

Background

The section from yellow sand to the long service life road of the Guangzhou subway line I is a shield tunnel section, and a foundation pit and a pile foundation of project construction are close to a station and an interval tunnel. Since 1 month in 2011, the longitudinal cracks of the duct piece descending at 10-12 points (facing a yellow sand station) at the top of the tunnel from K5+ 400-K5 +483 are more, the number of the cracks on an individual duct piece reaches 4, most of the cracks penetrate through the whole duct piece, and the maximum crack width is about 0.58 mm; most of the pipe pieces at 12-3 points (facing the yellow sand station) at K5+ 411-K5 +480 have longitudinal cracks, and the crack parts are approximately in mirror image distribution with the descending line. The duct piece cracks more seriously from 12 points to 1 point at K5+440, and the maximum crack width is about 0.5 mm. The number of the upward cracks is 72, the number of the downward cracks is 53, and the total number is 125.

When the tunnel is used, the change of the soil body structure around the tunnel can cause the stress change of the tunnel, the tunnel is damaged more seriously, and the condition is frequently generated when the subway tunnel is used. Due to the excavation of deep foundation pits of construction projects around the subway and external reasons of heavy load piled above the axis of the subway, the stress of segments of the shield tunnel is gradually changed, and the tunnel is subjected to axis deviation and tunnel structure damage.

In order to ensure the safety of the subway tunnel structure, some urban subway tunnels adopt steel ring reinforcement construction on tunnel segments before the operation of the subway tunnels, so that the potential safety hazard of the tunnel structure in the later period is avoided. When the subway tunnel operation time is longer, the peripheral soil body condition of subway line and bear and take place great change, the condition that the subway tunnel takes place axis skew, tunnel structure disease is more complicated, often can arouse the local stress overload of tunnel section of jurisdiction, needs in time to take reinforcement measures to the tunnel section of jurisdiction, will reduce the influence to tunnel railway operation as far as possible when taking reinforcement measures in addition, improves construction speed as far as possible.

The Chinese patent with the application number of CN207568618U discloses a tunnel reinforcing structure, which is used for reinforcing a tunnel segment ring and a ballast bed, wherein the tunnel reinforcing structure comprises a grouting reinforcing soil body, and the grouting reinforcing soil body is arranged on the outer side wall of the tunnel segment ring; the inner side wall of the tunnel segment ring is provided with a steel plate reinforcing structure, the steel plate reinforcing structure comprises a steel ring sleeved on the inner side wall of the tunnel segment ring and a reinforcing rib plate for connecting the steel ring and the ballast bed, and the steel ring is installed in a matched mode with the inner side wall of the tunnel segment ring through bolts; the steel ring is an annular structure formed by fixedly connecting a plurality of sections of arc-shaped steel plates in sequence. The utility model discloses adaptability is good, can carry out tunnel structure reinforcement, long service life under the minimum condition to tunnel railway operation.

Chinese patent with application number CN107780950A discloses an adjustable tension tunnel reinforcing steel ring, belonging to the technical field of tunnel reinforcement. The adjustable tension tunnel reinforcing steel ring is composed of a support bottom, a supporting system, a steel ring connecting seat, a tension monitoring system, a planar sleeve, a supporting frame, a steel ring and a common steel ring, wherein the support bottom comprises a groove and a bolt supporting seat, the supporting system comprises a bolt supporting seat, a protrusion and a supporting main body, and the steel ring connecting seat comprises a groove and a bolt supporting seat. The invention has high installation accuracy and simple and convenient construction, reduces the construction cost of multiple supporting of the tunnel and solves the problem of deformation of the tunnel structure; it can expand or reduce the tension of steel ring many times, can avoid stress concentration to cause destruction to the ground when being under construction. The invention provides support for the bearing capacity of the tunnel structure, can reinforce the tunnel structure subsequently and provides dynamic support for the tunnel system.

Chinese patent application No. CN108005682A discloses a shield tunnel reinforcing method, which comprises the following steps: forming a stirring pile on the outer side of the shield tunnel; arranging a grouting hole between the mixing pile and the shield tunnel, installing a sleeve valve pipe in the grouting hole, and installing a one-way valve at the upper end of the sleeve valve pipe; gaps formed between the grouting holes and the outer wall of the sleeve valve pipe are blocked by adopting quick-setting cement mortar; and grouting is carried out at the grouting holes, the grouting effect is checked after grouting is finished, and hole-supplementing grouting is carried out on unqualified sections. By adopting the shield tunnel reinforcing method provided by the technical scheme of the invention, the reinforcing effect on the shield tunnel is good, the tunnel stratum uplift can be avoided, the stability of the subway track is ensured, and the stable operation of the subway is further ensured.

The existing reinforcing method adopts a cement mixing pile for reinforcing, wherein cement paste is used as a reinforcing material and sprayed into a foundation soil layer by compressed air, a drill bit is used for forcibly mixing the cement paste and the soil in situ and fully mixing the cement paste and the soil to form a cylinder with strong integrity, good water stability and higher strength, and the reinforcing body is used as a vertical bearing capacity to jointly act with the foundation soil in situ to form a composite foundation. However, the reinforcing mode needs a large amount of cement paste, the construction period is long, the mixing piles can only integrally reinforce the stratum, the reinforcing effect on the shield tunnel is not good enough, in addition, the stratum is raised due to the excessive mixing piles, the integrity of the tunnel is influenced, the track in the tunnel is uneven, and the stable operation of the subway is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a reinforcing device for a shield tunnel with a soft soil foundation, which is used for solving the problems that the existing shield tunnel is poor in reinforcing effect during construction, long in construction period, only capable of reinforcing the stratum integrally, not good in reinforcing effect of the shield tunnel, and easy to break tunnel segments and cause tunnel stratum swelling. The invention also provides a using method of the reinforcing device for the shield tunnel of the soft soil foundation, and aims to improve the construction efficiency and the construction safety of the shield tunnel.

In order to solve the technical problems, the invention adopts the following technical scheme:

a reinforcing device for a soft soil foundation shield tunnel comprises tunnel segments, wherein the tunnel segments are formed by splicing six spliced segments, each spliced segment comprises a spliced inner wall, a foam reinforcing layer and a spliced outer wall, and the foam reinforcing layer is arranged between the spliced inner wall and the spliced outer wall;

reinforcing apparatus installs in concatenation section of jurisdiction concatenation department, reinforcing apparatus is including consolidating the connecting rod, consolidating the slide bar, consolidating the horizontal pole and linking a fixed arm, consolidate the connecting rod lower part and consolidate slide bar top fixed connection, consolidate the slide bar bottom and consolidate the horizontal pole and be connected, link a fixed arm top and consolidate connecting rod sliding connection, link a fixed arm bottom and consolidate the slide bar fixed connection.

Reinforcing apparatus is when fixed tunnel section of jurisdiction, and the reinforcing connecting rod is adjusted through slip tension and is hung the seam gap, through adjustment reinforcing apparatus, adjusts tunnel section of jurisdiction tension, enlarges or carries out the plane position when reducing tension when tunnel section of jurisdiction receives pressure and fix, makes the stress distribution of tunnel section of jurisdiction even, avoids stress concentration phenomenon, leads to the fact the destruction to tunnel section of jurisdiction.

The reinforcing connecting rods comprise first connecting rods and second connecting rods, the center lines of the first connecting rods and the second connecting rods are parallel, and the backs of the first connecting rods and the second connecting rods are connected with a spliced duct piece through bolts;

the reinforcing sliding rod comprises a first sliding rod and a second sliding rod, the top of the first sliding rod is fixedly connected with the lower part of the first connecting rod, and the top of the second sliding rod is fixedly connected with the lower part of the second connecting rod;

a first sliding rail is arranged on the first sliding rod;

and a second sliding rail is arranged on the second sliding rod.

The utility model discloses a tunnel segment, including tunnel segment, spliced section of jurisdiction, head rod, second connecting rod, first connecting rod, second connecting rod body, first connecting rod, second connecting rod, first connecting rod.

The reinforcing cross rod comprises a first swinging plate and a second swinging plate, the first swinging plate is arranged on the upper portion of the left end of the reinforcing cross rod, the second swinging plate is arranged on the upper portion of the right end of the reinforcing cross rod, the left end of the reinforcing cross rod is connected with the first sliding rod through the first swinging plate, and the right end of the reinforcing cross rod is connected with the second sliding rod through the second swinging plate.

When the pressure removal is received at the section of jurisdiction, first slide bar is fixed in the tunnel section of jurisdiction through bottom sliding bolt, first slide bar can be less than 45 degrees removal in the contained angle of consolidating the horizontal pole through first swing board, the second slide bar can be less than-45 degrees removal in the contained angle of consolidating the horizontal pole through second swing board, even axle fixed arm drives and consolidates the connecting rod and consolidate the slide bar and remove, and receive the pressure irregularity at the tunnel section of jurisdiction and carry out the micro-adjustment when removing, guarantee that the section of jurisdiction can not shift to shift

The connecting shaft fixing arm comprises a connecting shaft center, a first connecting arm and a second connecting arm, the tail end of the first connecting arm is fixedly connected with the connecting shaft center, a first connecting rod is connected with the top end of the first connecting arm, the tail end of the second connecting arm is fixedly connected with the shaft center, and the top end of the second connecting arm is connected with a second connecting rod;

the first connecting arm comprises a first connecting arm fixing piece, a first connecting arm body, a first connecting arm rod and a first connecting arm sliding block, the first connecting arm fixing piece is fixedly connected with the connecting axis, the tail end of the first connecting arm body is movably connected with the first connecting arm fixing piece, the head end of the first connecting arm body is movably connected with the tail end of the first connecting arm rod, the head end of the first connecting arm rod is movably connected with the first connecting arm sliding block, and the first connecting arm sliding block is arranged on the first connecting rod through a sliding rail;

the second linking arm comprises a second linking arm fixing piece, a second linking arm body, a second linking arm rod and a second linking arm sliding block, the second linking arm fixing piece is fixedly connected with the connecting axis, the tail end of the second linking arm body is movably connected with the second linking arm fixing piece, the head end of the second linking arm body is movably connected with the tail end of the second linking arm rod, the head end of the second linking arm rod is movably connected with the second linking arm sliding block, and the second linking arm sliding block is installed on the second connecting rod through a sliding rail.

The connecting shaft fixing arm further comprises a third connecting arm and a fourth connecting arm, the tail end of the third connecting arm is fixedly connected with the connecting shaft center, the top end of the third connecting arm is connected with the first sliding rod through a first sliding rail, the tail end of the fourth connecting arm is fixedly connected with the shaft center, and the top end of the fourth connecting arm is connected with the second sliding rod through a second sliding rail;

the third connecting arm comprises a third connecting arm fixing piece, a third connecting arm body, a third connecting arm rod and a third connecting arm sliding block, the third connecting arm fixing piece is fixedly connected with the connecting axis, the tail end of the third connecting arm body is movably connected with the third connecting arm rod, the head end of the third connecting arm rod is movably connected with the third connecting arm sliding block, and the third connecting arm sliding block is connected with the first sliding rail;

the fourth linking arm comprises a fourth linking arm fixing piece, a fourth linking arm body, a fourth linking arm rod and a fourth linking arm sliding block, the fourth linking arm fixing piece is fixedly connected with the connecting axis, the tail end of the fourth linking arm body is movably connected with the fourth linking arm rod, the head end of the fourth linking arm rod is movably connected with the fourth linking arm sliding block, and the fourth linking arm sliding block is connected with the second sliding rail.

The top end of the first connecting arm is connected with the first connecting rod, the tail end of the second connecting arm is fixedly connected with the axis, the top end of the second connecting arm is connected with the second connecting rod, when the first connecting rod and the second connecting rod body slide to perform corresponding position adjustment according to the direction and the distance of the expansion and displacement of the stress of the tunnel segment, the first connecting arm sliding block limits the first connecting arm, so that the first connecting arm cannot slide on the first connecting rod, after the limiting, the first connecting arm recovers or externally supports the first connecting arm body and the first connecting arm rod through the direction or the position of the first connecting rod needing to move, the second connecting arm sliding block limits the second connecting arm, so that the second connecting arm cannot slide on the second connecting rod, and after the limiting, the second connecting arm passes through the direction or the position of the second connecting rod needing to move, so that the second connecting arm body, The second linking arm pole is retrieved or is propped outward, the third linking arm carries on spacingly at first slide bar to the third linking arm pole through the third linking arm sliding block, and the third linking arm body carries out the stress adjustment in coordination with first linking arm to tunnel section of jurisdiction B afterwards and handles, the fourth linking arm carries on spacingly at the second slide bar to the fourth linking arm pole through the fourth linking arm sliding block, and the fourth linking arm carries out the stress adjustment in coordination with the second slide bar to tunnel section of jurisdiction B afterwards and handles, adopts the parallelly connected reinforcement of tunnel both sides, makes stress distribution even, avoids stress concentration phenomenon, causes destruction to existing structure, avoids the stratum to take place the uplift, influences the wholeness in tunnel, leads to tunnel section of jurisdiction B unevenness in the tunnel.

The cross section shape of the splicing part of the tunnel segment B body is omega, one part of the tunnel segment B body is provided with an omega-shaped concave cut, the other part of the tunnel segment B body is provided with an omega-shaped convex spigot, and the omega-shaped convex spigot is embedded into the omega-shaped concave cut.

The radian of the convex part of the omega-shaped male seam allowance B2 is consistent with the radian of the concave part of the omega-shaped female seam 1B, when in specific use, the convex part of the omega-shaped male seam allowance B2 is completely matched with the concave part of the omega-shaped female seam 1B, and meanwhile, the omega-shaped male seam allowance B2 is only required to be slightly embedded into the omega-shaped female seam 1B without artificial stretching, the contact surface formed by the omega-shaped male seam allowance B is large, the butt joint surface is uniformly jointed, the dislocation phenomenon can not occur, the linear length of the seam is greatly increased due to the omega-shaped shape, and the water seepage problem is well solved

The omega-shaped concave cut comprises a first straight line profile, a second straight line profile, a third straight line profile, a fourth straight line profile, a first arc profile, a second arc profile and a third arc profile, wherein the first straight line profile is tangent to the first arc profile, the first arc profile is tangent to the second straight line profile, the second straight line profile is tangent to the second arc profile, the second arc profile is tangent to the third straight line profile, the third straight line profile is tangent to the third arc profile, and the third arc profile is tangent to the fourth straight line profile.

The inward sunken omega-shaped concave notch 1B can better bite the omega-shaped convex spigot B2, and the second straight line profile 102, the third straight line profile 103 and the second arc profile 106 of the omega-shaped concave notch 1B form a reversed drop shape, so that the omega-shaped convex spigot B2 cannot be separated outwards after biting, and the stability of the tunnel segment B is further enhanced.

The omega-shaped convex spigot comprises a first straight line joint face, a second straight line joint face, a third straight line joint face, a fourth straight line joint face, a first arc joint face, a second arc joint face and a third arc joint face, wherein the first straight line joint face is connected with the first arc joint face, the first arc joint face is tangent to the second straight line joint face, the second straight line joint face is tangent to the second arc joint face, the second arc joint face is tangent to the third straight line joint face, the third straight line joint face is tangent to the third arc joint face, and the third arc joint face is tangent to the fourth straight line joint face.

The water drop-shaped protrusion formed by the second linear profile 102, the third linear profile 103 and the second circular arc of the omega-shaped male spigot B2 can be better embedded into the omega-shaped concave notch 1B in specific use, so that the omega-shaped male spigot B2 can only be pulled out from the groove in advance, the installation of the tunnel segment B is simpler and can not make mistakes, and meanwhile, the sealing stability is ensured.

The left end and the right end of the reinforcing connecting rod are respectively provided with a foam filling machine, each foam filling machine comprises a filling injection head, a concentrated foam box and a foam sliding rail, the working end of each filling injection head penetrates through the inner wall of the splicing and is arranged in the foam reinforcing layer, the rear end of each filling injection head is fixedly connected with the concentrated foam box, and the concentrated foam boxes are slidably mounted on the foam sliding rails;

the foam filling machine comprises an inductor, an air compressor and an air pipeline connecting a filling injection head and the air compressor, wherein a pressure regulating valve and an electromagnetic valve are installed on the pipeline connecting the air compressor and the filling injection head.

When the crack appears in the section of jurisdiction because groundwater pressure increases, locate the crack to be sensed to the inside inductor of foam filling machine on the reinforcement connecting rod, the solenoid valve is opened and is driven the air-vent valve and carry out pressure release, the air-vent valve release back, the air compressor machine is in with the reinforcement foam of concentrated foam case through filling injection head injection foam reinforcing layer in, the foam hardens rapidly, avoid crack increase or a large amount of infiltration to lead to the section of jurisdiction complete breakage, cause the shield structure machine to be buried, constructor life safety receives the threat.

The foam in the foam filling machine is formed by mixing 25-45 parts by weight of soft-foam polyether polyol with the average molecular weight of 5000-6000, 10-50 parts by weight of hard-foam polyether polyol with the average molecular weight of 700-1000, 20-45 parts by weight of intermediate polyether polyol with the average molecular weight of 2000-3000, 0.15-0.75 part by weight of amine catalyst, 30-60 parts by weight of modified surfactant, 0.5-2.5 parts by weight of foam stabilizer and 2-6 parts by weight of cross-linking agent, wherein the modified surfactant comprises water and surfactant, and the mass ratio of the water to the surfactant is 1-3: 1.

mixing the raw materials, stirring for 3h, standing for 2h, putting 15mL of clarified composite material into a centrifuge tube, placing the centrifuge tube into a 6000r/min centrifuge for centrifugal treatment for 25min, taking out the centrifuge tube for observation, wherein the composite material is uniform and transparent without obvious layering phenomenon, and pumping, mixing and foaming on foaming equipment with the temperature of 60 ℃ to prepare the polyurethane foam.

The polyurethane foam composite material has the advantages that the polyurethane foam composite material is not separated out or layered after being stored for a long time, the excellent stability is realized, the problems that the storage time of the existing polyurethane foam composite material is short, the performance of prepared polyurethane foam is unstable are solved, meanwhile, the waterproofness and the airtightness are good, the crack of the tunnel segment can be rapidly sealed and reinforced after being sprayed out, the crack is prevented from being enlarged, the tunnel segment is completely broken due to the increase of the received stress, and the tunnel collapses.

The application method of the reinforcing device for the shield tunnel of the soft soil foundation comprises the following steps:

s1: segment installation, shield structure impel after the end, assemble the segment annulation rapidly, start from the standard block segment of lower part, the left and right sides installs standard segment in turn in proper order, then assembles adjacent block segment, installs the block segment of capping at last, fastens hoop connecting bolt earlier, the back fastening axial connecting bolt. The axial connecting bolts are fastened by adopting a torque wrench, the fastening force depends on the diameter and the strength of the bolts, and after the ring pipe sheets are assembled, all the shield jacks are used for uniformly applying pressure to sufficiently fasten the axial connecting bolts;

s2: the reinforcing device is installed at the splicing position of the spliced duct pieces after the duct pieces are formed into rings, and comprises a reinforcing connecting rod, a reinforcing sliding rod, a reinforcing transverse rod and a connecting shaft fixing arm, wherein the lower part of the reinforcing connecting rod is fixedly connected with the top end of the reinforcing sliding rod, the bottom end of the reinforcing sliding rod is connected with the reinforcing transverse rod, the top end of the connecting shaft fixing arm is slidably connected with the reinforcing connecting rod, the bottom end of the connecting shaft fixing arm is fixedly connected with the reinforcing sliding rod, and the back parts of a first connecting rod and a second connecting rod are connected with one spliced duct piece through bolts;

s3: the foam filling machine comprises a filling injection head, a concentrated foam box and a foam sliding rail, wherein the working end of the filling injection head penetrates through the spliced inner wall and is arranged in the foam reinforcing layer, the rear end of the filling injection head is fixedly connected with the concentrated foam box, the concentrated foam box is slidably arranged on the foam sliding rail, the foam filling machine comprises an inductor, an air compressor and an air pipeline for connecting the filling injection head and the air compressor, and a pressure regulating valve and an electromagnetic valve are arranged on the pipeline for connecting the air compressor and the filling injection head;

s4: the reinforcing cross bar comprises a first swinging plate and a second swinging plate, the first swinging plate is arranged at the upper part of the left end of the reinforcing cross bar, the second swinging plate is arranged at the upper part of the right end of the reinforcing transverse rod, the left end of the reinforcing transverse rod is connected with the first sliding rod through the first swinging plate, the right end of the reinforcing transverse rod is connected with the second sliding rod through the second swinging plate, when the duct piece moves under pressure, the first sliding rod is fixed on the tunnel duct piece through the bottom sliding bolt, the first sliding rod can move by the included angle of the first swinging plate and the reinforcing cross rod being less than 45 degrees, the second sliding rod can move at an included angle of less than 45 degrees to the reinforcing transverse rod through the second swinging plate, the connecting shaft fixing arm drives the reinforcing connecting rod to reinforce the sliding rod to move, the tunnel segment is subjected to micro-adjustment when the tunnel segment receives pressure and moves irregularly, so that the segment is prevented from shifting;

s4: the broken restoration of section of jurisdiction when the crack appears in the section of jurisdiction because groundwater pressure increases, locates the inside inductor of foam filling machine on the reinforcement connecting rod and senses the crack, and the solenoid valve is opened and is driven the air-vent valve and carry out pressure release, and the air-vent valve release back, the air compressor machine is in with the reinforcement foam of concentrated foam case through filling injection head injection foam reinforcement in situ, and the foam hardens rapidly, avoids crack increase or a large amount of infiltration to lead to the section of jurisdiction complete breakage.

Compared with the prior art, the invention has the following beneficial effects:

the second straight line profile 102, the third straight line profile 103 and the second arc profile 106 of the omega-shaped concave cut 1B form an inverted drop shape, so that the omega-shaped convex spigot B2 cannot be separated outwards after occlusion, and the stability of the tunnel segment B is further enhanced;

2. the two sides of the tunnel are reinforced in parallel, so that stress is uniformly distributed, the phenomenon of stress concentration is avoided, the existing structure is damaged, and the problems that the stratum is raised, the integrity of the tunnel is influenced and the tunnel segment B in the tunnel is uneven are avoided;

3. after the pressure regulating valve is released, the air compressor injects the reinforcing foam in the concentrated foam box into the foam reinforcing layer through the filling injection head, the foam is rapidly hardened, the phenomenon that the segment is completely broken due to crack increase or a large amount of water seepage is avoided, and the personal safety of a shield machine and constructors is guaranteed.

Drawings

FIG. 1 is a schematic sectional view of a tunnel segment of an embodiment of a reinforcing apparatus for a shield tunnel of a soft soil foundation according to the present invention;

FIG. 2 is a schematic perspective view of an embodiment of the reinforcing apparatus for a shield tunnel of a soft soil foundation according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 taken at Z;

FIG. 4 is a schematic structural view of an omega-shaped convex spigot at the joint of tunnel segments in an embodiment of the reinforcing apparatus for a shield tunnel with a soft soil foundation according to the present invention;

FIG. 5 is a schematic structural view of an omega-shaped concave cut at the joint of tunnel segments in an embodiment of the reinforcing apparatus for shield tunnels with soft soil foundations according to the present invention;

fig. 6 is a schematic view of a connection structure of an omega-shaped convex spigot and an omega-shaped concave notch at a connection part of tunnel segments in an embodiment of the reinforcing device for the shield tunnel with the soft soil foundation.

Reference numerals in the drawings of the specification include:

a reinforcing device A;

a foam filling machine A1a, a filling injection head A1A1, a concentrated foam box A1a2 and a foam sliding rail A1a 3;

a reinforcing connecting rod A1, a first connecting rod A11, a second connecting rod A12,

A reinforced slide bar A2, a first slide bar A21, a first slide rail A211, a second slide bar A22, a second slide rail A221;

a reinforcing cross bar A3, a first swing plate A31, a second swing plate A32;

a connecting shaft fixing arm A4, a connecting shaft center A41, a first connecting arm A42, a first connecting arm fixing piece A421, a first connecting arm body A422, a first connecting arm rod A423 and a first connecting arm sliding block A424;

a second connecting arm a43, a second connecting arm fixing piece a431, a second connecting arm body a432, a second connecting arm lever a433, and a second connecting arm sliding block a 434;

a third link arm a44, a third link arm fixing piece a441, a third link arm body a442, a third link arm lever a443, and a third link arm sliding block a 444;

a fourth connecting arm a45, a fourth connecting arm fixing piece a451, a fourth connecting arm body a452, a fourth connecting arm lever a453, and a fourth connecting arm sliding block a 454;

a tunnel segment B;

spliced duct piece B1a, spliced inner wall B1a1, foam reinforcing layer B1a2, spliced outer wall B1a3,

A cross section B1A, a concave cut B1B, a first straight line profile B101, a second straight line profile B102, a third straight line profile B103, a fourth straight line profile B104, a first circular arc profile B105, a second circular arc profile B106 and a third circular arc profile B107;

a convex spigot B2, a first straight line joint surface B201, a second straight line joint surface B202, a third straight line joint surface B203, a fourth straight line joint surface B204, a first arc joint surface B205, a second arc joint surface B206 and a third arc joint surface B207.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1-6, the reinforcing apparatus for the shield tunnel of the soft soil foundation includes a tunnel segment B, the tunnel segment B is formed by splicing six spliced segments B1a, the spliced segment B1a includes a spliced inner wall B1a1, a foam reinforcing layer B1a2 and a spliced outer wall B1a3, and the foam reinforcing layer B1a2 is arranged between the spliced inner wall B1a1 and the spliced outer wall B1a 3;

reinforcing apparatus A installs in concatenation section of jurisdiction B1a concatenation department, reinforcing apparatus A is including consolidating connecting rod A1, consolidating slide bar A2, consolidating horizontal pole A3 and linking a fixed arm A4, consolidate connecting rod A1 lower part and consolidate slide bar A2 top fixed connection, consolidate slide bar A2 bottom and consolidate horizontal pole A3 and be connected, link a fixed arm A4 top and consolidate connecting rod A1 sliding connection, link a fixed arm A4 bottom and consolidate slide bar A2 fixed connection.

Reinforcing apparatus A is when fixed tunnel section of jurisdiction B, and reinforcing connecting rod A1 is adjusted through slip tension and is hung the seam gap, through adjustment reinforcing apparatus A, adjusts tunnel section of jurisdiction tension, enlarges or carries out the plane position when reducing tension when tunnel section of jurisdiction receives pressure and fixes, makes the stress distribution of tunnel section of jurisdiction even, avoids stress concentration phenomenon, leads to the fact the destruction to tunnel section of jurisdiction.

Example two:

as a further improvement of the previous embodiment, as shown in fig. 1 to 6, in this embodiment, a reinforcing apparatus for a soft soil foundation shield tunnel includes a tunnel segment B, the tunnel segment B is formed by splicing six spliced segments B1a, the spliced segment B1a includes a spliced inner wall B1a1, a foam reinforcing layer B1a2, and a spliced outer wall B1a3, and the foam reinforcing layer B1a2 is disposed between the spliced inner wall B1a1 and the spliced outer wall B1a 3;

The reinforcing connecting rod A1 comprises a first connecting rod A11 and a second connecting rod A12, the center line of the first connecting rod A11 is parallel to the center line of the second connecting rod A12, and the backs of the first connecting rod A11 and the second connecting rod A12 are connected with one spliced pipe piece 1a through bolts;

the reinforced sliding rod A2 comprises a first sliding rod A21 and a second sliding rod A22, the top of the first sliding rod A21 is fixedly connected with the lower part of a first connecting rod A11, and the top of the second sliding rod A22 is fixedly connected with the lower part of a second connecting rod A12;

a first sliding rail A211 is arranged on the first sliding rod A21;

the second sliding rod a22 is provided with a second sliding rail a 221.

First connecting rod A11, second connecting rod A12 back connect a concatenation section of jurisdiction 1a alone through bolted connection, when concatenation section of jurisdiction 1a received the stress expansion, first connecting rod A11, second connecting rod A12 body slide according to the direction and the distance that tunnel segment B stress expansion shifted and carry out corresponding position control, adjust tunnel segment B to the position of agreeing with after, first connecting rod A11, second connecting rod A12 is fixed and is spacing tunnel segment B, receive the stress size through following concatenation section of jurisdiction 1a and carry out the activity regulation fixed, reduce the pressure that tunnel segment B received, consolidate tunnel segment B junction simultaneously, avoid tunnel segment B to connect the disconnection.

The reinforcing cross bar A3 includes first swing board A31, second swing board A32, reinforcing cross bar A3 left end upper portion is located to first swing board A31, reinforcing cross bar A3 right end upper portion is located to second swing board A32, reinforcing cross bar A3 left end is connected with first slide bar A21 through first swing board A31, reinforcing cross bar A3 right-hand member is connected with second slide bar A22 through second swing board A32.

When the pressure removal is received to the section of jurisdiction, first slide bar A21 is fixed in the tunnel section of jurisdiction through bottom sliding bolt, first slide bar A21 can be less than 45 degrees removal in the contained angle of consolidating horizontal pole A3 through first swing board A31, second slide bar A22 can be less than-45 degrees removal in the contained angle of consolidating horizontal pole A3 through second swing board A32, even axle fixed arm A4 drives and consolidates connecting rod A1 and consolidates slide bar A2 and removes, and carries out the micro-adjustment when the tunnel section of jurisdiction receives pressure irregular removal, guarantees that the section of jurisdiction can not shift and can not shift the section of jurisdiction

The connecting shaft fixing arm A4 comprises a connecting shaft center A41, a first connecting arm A42 and a second connecting arm A43, the tail end of the first connecting arm A42 is fixedly connected with the connecting shaft center A41, a first connecting rod A11 at the top end of the first connecting arm A42 is connected, the tail end of the second connecting arm A43 is fixedly connected with a shaft center A41, and the top end of the second connecting arm A43 is connected with a second connecting rod A12;

the first connecting arm A42 comprises a first connecting arm fixing piece A421, a first connecting arm body A422, a first connecting arm rod A423 and a first connecting arm sliding block A424, the first connecting arm fixing piece A421 is fixedly connected with a connecting axis A41, the tail end of the first connecting arm body A422 is movably connected with the first connecting arm fixing piece A421, the head end of the first connecting arm body A422 is movably connected with the tail end of the first connecting arm rod A423, the head end of the first connecting arm rod A423 is movably connected with the first connecting arm sliding block A424, and the first connecting arm sliding block A424 is mounted on the first connecting rod A11 through a sliding rail;

second linking arm A43 includes second linking arm stationary blade A431, the second linking arm body A432, second linking arm pole A433 and second linking arm sliding block A434, second linking arm stationary blade A431 and connection axle center A41 fixed connection, second linking arm body A432 tail end and second linking arm stationary blade A431 swing joint, second linking arm body A432 head end and second linking arm pole A433 tail end swing joint, second linking arm pole A433 head end and second linking arm sliding block A434 swing joint, second linking arm sliding block linking arm A434 passes through the slide rail and installs in second connecting rod A12.

The connecting shaft fixing arm A4 further comprises a third connecting arm A44 and a fourth connecting arm A45, the tail end of the third connecting arm A44 is fixedly connected with a connecting shaft center A41, the top end of the third connecting arm A44 is connected with a first sliding rod A21 through a first sliding rail A211, the tail end of the fourth connecting arm A45 is fixedly connected with a shaft center A41, and the top end of the fourth connecting arm A45 is connected with a second sliding rod A22 through a second sliding rail A221;

the third connecting arm a44 comprises a third connecting arm fixing piece a441, a third connecting arm body a442, a third connecting arm rod a443 and a third connecting arm sliding block a444, the third connecting arm fixing piece a441 is fixedly connected with a connecting shaft center a41, the tail end of the third connecting arm body a442 is movably connected with the third connecting arm rod a443, the head end of the third connecting arm rod a443 is movably connected with a third connecting arm sliding block a444, and the third connecting arm sliding block a444 is connected with the first sliding rail a 211;

the fourth connecting arm a45 includes a fourth connecting arm fixing piece a451, a fourth connecting arm body a452, a fourth connecting arm lever a453 and a fourth connecting arm sliding block a454, the fourth connecting arm fixing piece a451 is fixedly connected with the connecting axis a41, the tail end of the fourth connecting arm body a452 is movably connected with the fourth connecting arm lever a453, the head end of the fourth connecting arm lever a453 is movably connected with the fourth connecting arm sliding block a454, and the fourth connecting arm sliding block a454 is connected with the second sliding rail a 221.

The top end of the first connecting arm A42 is connected with a first connecting rod A11, the tail end of the second connecting arm A43 is fixedly connected with a connecting shaft center A41, the top end of the second connecting arm A43 is connected with a second connecting rod A12, when the bodies of the first connecting rod A11 and the second connecting rod A12 slide according to the direction and distance of the expansion and displacement of the stress of the tunnel segment B to perform corresponding position adjustment, the first connecting arm A42 is limited by a first connecting arm sliding block A424, so that the first connecting arm A42 cannot slide on the first connecting rod A11, after the limitation, the first connecting arm A42 recovers or externally supports the first connecting arm body A422 and the first connecting arm A423 through the direction or position of the first connecting rod A11, the second connecting arm A434 limits the second connecting arm A43, so that the second connecting arm A43 cannot slide on the second connecting rod A12, and after the limitation, the second connecting arm A43 passes through the direction or position of the second connecting rod A12, the second connecting arm body a432 and the second connecting arm rod a433 are recovered or externally supported, the third connecting arm a44 limits the third connecting arm rod a443 at the first sliding rod a21 through a third connecting arm sliding block a444, then the third connecting arm body a442 cooperates with the first connecting arm a42 to perform stress adjustment processing on the tunnel segment B, the fourth connecting arm a45 limits the fourth connecting arm rod a453 at the second sliding rod a22 through a fourth connecting arm sliding block a454, then the fourth connecting arm a45 cooperates with the second sliding rod a22 to perform stress adjustment processing on the tunnel segment B, and the two sides of the tunnel are reinforced in parallel, so that stress distribution is uniform, stress concentration is avoided, damage to the existing structure is avoided, stratum swelling is avoided, integrity of the tunnel is influenced, and the tunnel segment B in the tunnel is uneven.

Compared with the first embodiment, the second embodiment adopts the two sides of the tunnel to be connected in parallel for reinforcement, so that the stress distribution is uniform, the stress concentration phenomenon is avoided, the existing structure is damaged, the stratum is prevented from being raised, the integrity of the tunnel is prevented from being influenced, and the tunnel segment B in the tunnel is not flat.

Example three:

a first sliding rail A211 is arranged on the first sliding rod A21;

the second sliding rod a22 is provided with a second sliding rail a 221.

The cross section B1A of the splicing part of the tunnel segment B body is in an omega shape, one part of the body is provided with an omega-shaped concave cut B1B, the other part of the body is provided with an omega-shaped convex spigot B2, and the omega-shaped convex spigot B2 is embedded in the omega-shaped concave cut B1B.

The radian of the convex part of the omega-shaped male seam allowance B2 is consistent with that of the concave part of the omega-shaped female seam 1B, when the water seepage preventing device is used specifically, the convex part of the omega-shaped male seam allowance B2 is completely matched with the concave part of the omega-shaped female seam 1B, and meanwhile, the omega-shaped male seam allowance B2 is only required to be slightly embedded into the omega-shaped female seam 1B without artificial stretching, the contact surface formed by the omega shape is large, the butt joint surface is uniformly jointed, the dislocation phenomenon cannot occur, the seam is in the omega shape, the linear length is greatly increased, and the water seepage problem is well solved.

The omega-shaped concave cut B1B comprises a first straight line profile B101, a second straight line profile B102, a third straight line profile B103, a fourth straight line profile B104, a first circular arc profile B105, a second circular arc profile B106 and a third circular arc profile B107, wherein the first straight line profile B101 is tangent to the first circular arc profile B105, the first circular arc profile B105 is tangent to the second straight line profile B102, the second straight line profile B102 is tangent to the second circular arc profile B106, the second circular arc profile B106 is tangent to the third straight line profile B103, the third straight line profile B103 is tangent to the third circular arc profile B107, and the third circular arc profile B107 is tangent to the fourth straight line profile B104.

The omega-shaped convex seam allowance B2 comprises a first straight line joint face B201, a second straight line joint face B202, a third straight line joint face B203, a fourth straight line joint face B204, a first arc joint face B205, a second arc joint face B206 and a third arc joint face B207, wherein the first straight line joint face B201 is connected with the first arc joint face B205, the first arc joint face B205 is tangent to the second straight line joint face B202, the second straight line joint face B202 is tangent to the second arc joint face B206, the second arc joint face B206 is tangent to the third straight line joint face B203, the third straight line joint face B203 is tangent to the third arc joint face B207, and the third arc joint face B207 is tangent to the fourth straight line joint face B204.

For the third embodiment, the contact surface formed by the omega shape in the third embodiment is larger, the butt joint surfaces are uniformly attached, the dislocation phenomenon cannot occur, the seam is in the omega shape, the linear length is greatly increased, and the water seepage problem is well solved.

Example four:

a first sliding rail A211 is arranged on the first sliding rod A21;

the second sliding rod a22 is provided with a second sliding rail a 221.

The left end and the right end of the reinforced connecting rod A1 are respectively provided with a foam filling machine A1a, the foam filling machine A1a comprises a filling injection head A1A1, a concentrated foam box A1a2 and a foam sliding rail A1a3, the working end of the filling injection head A1A1 penetrates through a splicing inner wall B1a and is arranged in a foam reinforcing layer B1a2, the rear end of the filling injection head A1A1 is fixedly connected with the concentrated foam box A1a2, and the concentrated foam box A1a2 is slidably mounted on the foam sliding rail A1a 3;

the foam filling machine A1a comprises an inductor, an air compressor and an air pipeline connecting a filling injection head A1A1 with the air compressor, wherein a pressure regulating valve A16 and an electromagnetic valve are mounted on the pipeline connecting the air compressor with the filling injection head A1 A1.

When the crack appears in the section of jurisdiction because groundwater pressure increases, the crack is sensed to the inside inductor of foam filling machine A1a on locating reinforcing connecting rod A1, the solenoid valve is opened and is driven the air-vent valve and carry out pressure release, the air-vent valve release back, the air compressor machine injects the reinforcing foam in concentrated foam case A1a2 into foam back up layer B1a2 through filling injection head A1A1, the foam hardens rapidly, avoid crack increase or a large amount of infiltration to lead to the section of jurisdiction complete breakage, cause the shield structure machine to be buried, constructor life safety receives the threat.

The foam in the foam filling machine A1a is formed by mixing 25-45 parts by weight of soft-foam polyether polyol with the average molecular weight of 5000-6000, 10-50 parts by weight of hard-foam polyether polyol with the average molecular weight of 700-1000, 20-45 parts by weight of intermediate polyether polyol with the average molecular weight of 2000-3000, 0.15-0.75 part by weight of amine catalyst, 30-60 parts by weight of modified surfactant, 0.5-2.5 parts by weight of foam stabilizer and 2-6 parts by weight of cross-linking agent, wherein the modified surfactant comprises water and surfactant, and the mass ratio of the water to the surfactant is 1-3: 1.

Fourth embodiment in comparison with the third embodiment, the third embodiment of the invention uses the hollow press a15 to inject the reinforcing foam in the concentrated foam tank A1a2 into the foam reinforcing layer B1a2 through the filling injection head A1A1, so that the foam is rapidly hardened, and the situation that the segment is completely broken due to crack growth or large amount of water seepage, the shield machine is buried, and the life safety of constructors is threatened is avoided.

A use method of a reinforcing device for a shield tunnel of a soft soil foundation comprises the following steps:

s2: the reinforcing device is installed, after the segment is looped, the reinforcing device A is installed at the splicing position of the spliced segment B1a, the reinforcing device A comprises a reinforcing connecting rod A1, a reinforcing sliding rod A2, a reinforcing cross rod A3 and a connecting shaft fixing arm A4, the lower portion of the reinforcing connecting rod A1 is fixedly connected with the top end of the reinforcing sliding rod A2, the bottom end of the reinforcing sliding rod A2 is connected with the reinforcing cross rod A3, the top end of the connecting shaft fixing arm A4 is slidably connected with the reinforcing connecting rod A1, the bottom end of the connecting shaft fixing arm A4 is fixedly connected with the reinforcing sliding rod A2, and the backs of the first connecting rod A11 and the second connecting rod A12 are connected with one spliced segment 1a through bolts;

s3: the foam filling machine A1a is installed, the left end and the right end of a reinforcing connecting rod A1 are respectively provided with a foam filling machine A1a, the foam filling machine A1a comprises a filling injection head A1A1, a concentrated foam box A1a2 and a foam sliding rail A1A3, the working end of the filling injection head A1A1 penetrates through a splicing inner wall B1a and is arranged in a foam reinforcing layer B1a2, the rear end of the filling injection head A1A1 is fixedly connected with the concentrated foam box A1a2, the concentrated foam box A1a2 is slidably installed on the foam sliding rail A1A3, the foam filling machine A1a comprises an inductor, an air compressor and an air pipeline for connecting the filling injection head A1A1 with an air pressure, and a pressure regulating valve and an electromagnetic valve are installed on the pipeline for connecting the air compressor and the filling injection head A1 A1;

s4: segment reinforcement, a reinforcing cross bar A3 comprises a first swing plate A31 and a second swing plate A32, the first swing plate A31 is arranged on the upper portion of the left end of a reinforcing cross bar A3, the second swing plate A32 is arranged on the upper portion of the right end of a reinforcing cross bar A3, the left end of a reinforcing cross bar A3 is connected with a first sliding rod A21 through a first swing plate A31, the right end of a reinforcing cross bar A3 is connected with a second sliding rod A22 through a second swing plate A32, the first sliding rod A21 is fixed on a tunnel segment through a bottom sliding bolt when the segment receives pressure movement, the first sliding rod A21 can move through a first swing plate A31 at an included angle of the reinforcing cross bar A3 smaller than 45 degrees, the second sliding rod A22 can move through a second swing plate A32 at an included angle of the reinforcing cross bar A3 smaller than-45 degrees, and the connecting shaft A4 is used for driving a connecting rod A1 to move for reinforcing the segment A2 and for receiving irregular pressure movement, the segment is ensured not to shift;

s4: the broken restoration of section of jurisdiction, when the section of jurisdiction appears owing to groundwater pressure increase, the crack is sensed to the inside inductor of foam filling machine A1a of locating on consolidating connecting rod A1, the solenoid valve is opened and is driven the air-vent valve and carry out pressure release, air-vent valve A release back, the air compressor machine is with the reinforcement foam in concentrated foam case A1a2 through filling in injection head A1A1 injection foam reinforcing layer B1a2 in, the foam hardens rapidly, avoid crack increase or a large amount of infiltration to lead to the section of jurisdiction complete breakage.

The foregoing are merely exemplary embodiments of the present invention, and no attempt is made to show structural details of the invention in more detail than is necessary for the fundamental understanding of the art, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice with the teachings of the invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides a reinforcing apparatus for soft soil foundation shield tunnel which characterized in that: the soft soil foundation shield tunnel comprises tunnel segments (B), the tunnel segments (B) are formed by splicing six spliced segments (B1a), each spliced segment (B1a) comprises a spliced inner wall (B1a1), a foam reinforcing layer (B1a2) and a spliced outer wall (B1a3), and the foam reinforcing layer (B1a2) is arranged between the spliced inner wall (B1a1) and the spliced outer wall (B1a 3);

reinforcing apparatus (A) is installed in concatenation section of jurisdiction (B1a) concatenation department, reinforcing apparatus (A) is including consolidating connecting rod (A1), consolidating slide bar (A2), consolidating horizontal pole (A3) and linking a fixed arm (A4), consolidate connecting rod (A1) lower part and consolidate slide bar (A2) top fixed connection, consolidate slide bar (A2) bottom and consolidate horizontal pole (A3) and be connected, link a fixed arm (A4) top and consolidate connecting rod (A1) sliding connection, link a fixed arm (A4) bottom and consolidate slide bar (A2) fixed connection.

2. A reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 1, wherein: the reinforcing connecting rod (A1) comprises a first connecting rod (A11) and a second connecting rod (A12), the first connecting rod (A11) is parallel to the center line of the second connecting rod (A12), and the backs of the first connecting rod (A11) and the second connecting rod (A12) are connected with a spliced pipe piece (1a) through bolt connection;

the reinforced sliding rod (A2) comprises a first sliding rod (A21) and a second sliding rod (A22), the top of the first sliding rod (A21) is fixedly connected with the lower part of a first connecting rod (A11), and the top of the second sliding rod (A22) is fixedly connected with the lower part of a second connecting rod (A12);

a first sliding rail (A211) is arranged on the first sliding rod (A21);

the second sliding rod (A22) is provided with a second sliding rail (A221).

3. A reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 2, wherein: consolidate horizontal pole (A3) and include first swing board (A31), second swing board (A32), consolidate horizontal pole (A3) left end upper portion is located to first swing board (A31), consolidate horizontal pole (A3) right-hand member upper portion is located to second swing board (A32), consolidate horizontal pole (A3) left end and be connected with first slide bar (A21) through first swing board (A31), consolidate horizontal pole (A3) right-hand member and be connected with second slide bar (A22) through second swing board (A32).

4. A reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 2, wherein: the shaft connecting fixing arm (A4) comprises a connecting shaft center (A41), a first connecting arm (A42) and a second connecting arm (A43), the tail end of the first connecting arm (A42) is fixedly connected with the connecting shaft center (A41), a first connecting rod (A11) at the top end of the first connecting arm (A42) is connected, the tail end of the second connecting arm (A43) is fixedly connected with the shaft center (A41), and the top end of the second connecting arm (A43) is connected with a second connecting rod (A12);

the first connecting arm (A42) comprises a first connecting arm fixing piece (A421), a first connecting arm body (A422), a first connecting arm rod (A423) and a first connecting arm sliding block (A424), the first connecting arm fixing piece (A421) is fixedly connected with a connecting shaft center (A41), the tail end of the first connecting arm body (A422) is movably connected with the first connecting arm fixing piece (A421), the head end of the first connecting arm body (A422) is movably connected with the tail end of the first connecting arm rod (A423), the head end of the first connecting arm rod (A423) is movably connected with the first connecting arm sliding block (A424), and the first connecting arm sliding block (A424) is mounted on the first connecting rod (A11) through a sliding rail;

second linking arm (A43) includes second linking arm stationary blade (A431), the second linking arm body (A432), second linking arm pole (A433) and second linking arm sliding block (A434), second linking arm stationary blade (A431) and connection axle center (A41) fixed connection, second linking arm body (A432) tail end and second linking arm stationary blade (A431) swing joint, second linking arm body (A432) head end and second linking arm pole (A433) tail end swing joint, second linking arm pole (A433) head end and second linking arm sliding block (A434) swing joint, second linking arm sliding block (A434) installs in second connecting rod (A12) through the slide rail.

5. A reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 2, wherein: the connecting shaft fixing arm (A4) further comprises a third connecting arm (A44) and a fourth connecting arm (A45), the tail end of the third connecting arm (A44) is fixedly connected with a connecting shaft center (A41), the top end of the third connecting arm (A44) is connected with a first sliding rod (A21) through a first sliding rail (A211), the tail end of the fourth connecting arm (A45) is fixedly connected with the shaft center (A41), and the top end of the fourth connecting arm (A45) is connected with a second sliding rod (A22) through a second sliding rail (A221);

the third connecting arm (A44) comprises a third connecting arm fixing piece (A441), a third connecting arm body (A442), a third connecting arm rod (A443) and a third connecting arm sliding block (A444), the third connecting arm fixing piece (A441) is fixedly connected with a connecting shaft center (A41), the tail end of the third connecting arm body (A442) is movably connected with a third connecting arm rod (A443), the head end of the third connecting arm rod (A443) is movably connected with the third connecting arm sliding block (A444), and the third connecting arm sliding block (A444) is connected with the first sliding rail (A211);

the fourth connecting arm (a45) comprises a fourth connecting arm fixing piece (a451), a fourth connecting arm body (a452), a fourth connecting arm rod (a453) and a fourth connecting arm sliding block (a454), the fourth connecting arm fixing piece (a451) is fixedly connected with the connecting shaft center (a41), the tail end of the fourth connecting arm body (a452) is movably connected with the fourth connecting arm rod (a453), the head end of the fourth connecting arm rod (a453) is movably connected with the fourth connecting arm sliding block (a454), and the fourth connecting arm sliding block (a454) is connected with the second sliding rail (a 221).

6. A reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 1, wherein: the cross section (B1A) of the splicing part of the body of the tunnel segment B is in an omega shape, one part of the body is provided with an omega-shaped concave notch (B1B), the other part of the body is provided with an omega-shaped convex spigot (B2), and the omega-shaped convex spigot (B2) is embedded in the omega-shaped concave notch (B1B).

7. The reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 6, wherein: the omega-shaped concave cut (B1B) comprises a first straight line profile (B101), a second straight line profile (B102), a third straight line profile (B103), a fourth straight line profile (B104), a first circular arc profile (B105), a second circular arc profile (B106) and a third circular arc profile (B107), wherein the first straight line profile (B101) is tangent to the first circular arc profile (B105), the first circular arc profile (B105) is tangent to the second straight line profile (B102), the second straight line profile (B102) is tangent to the second circular arc profile (B106), the second circular arc profile (B106) is tangent to the third straight line profile (B103), the third straight line profile (B103) is tangent to the third circular arc profile (B107), and the third circular arc profile (B107) is tangent to the fourth straight line profile (B104).

8. The reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 6, wherein: the omega-shaped convex spigot (B2) comprises a first straight line joint surface (B201), a second straight line joint surface (B202), a third straight line joint surface (B203), a fourth straight line joint surface (B204), a first arc joint surface (B205), a second arc joint surface (B206) and a third arc joint surface (B207), wherein the first straight line joint surface (B201) is connected with the first arc joint surface (B205), the first arc joint surface (B205) is tangent to the second straight line joint surface (B202), the second straight line joint surface (B202) is tangent to the second arc joint surface (B206), the second arc joint surface (B206) is tangent to the third straight line joint surface (B203), the third straight line joint surface (B203) is tangent to the third arc joint surface (B207), and the third arc joint surface (B207) is tangent to the fourth straight line joint surface (B204).

9. A reinforcing apparatus for a shield tunnel of a soft soil foundation according to claim 1, wherein: the left end and the right end of the reinforcing connecting rod (A1) are respectively provided with a foam filling machine (A1a), the foam filling machine (A1a) comprises a filling injection head (A1A1), a concentrated foam box (A1a2) and a foam sliding rail (A1a3), the working end of the filling injection head (A1A1) penetrates through a splicing inner wall (B1A1) and is arranged in the foam reinforcing layer (B1a2), the rear end of the filling injection head (A1A1) is fixedly connected with the concentrated foam box (A1a2), and the concentrated foam box (A1a2) is slidably mounted on the foam sliding rail (A1a 3);

the foam filling machine (A1a) comprises an inductor, an air compressor and an air pipeline connecting the filling injection head (A1A1) and the air compressor, wherein a pressure regulating valve and an electromagnetic valve are mounted on the pipeline connecting the air compressor and the filling injection head (A1 A1).

10. The use method of the reinforcing apparatus for the shield tunnel of the soft soil foundation according to claim 9, wherein: the method comprises the following steps:

s2: the reinforcing device is installed, after the segment is looped, the reinforcing device (A) is installed at the splicing position of a spliced segment (B1a), the reinforcing device (A) comprises a reinforcing connecting rod (A1), a reinforcing sliding rod (A2), a reinforcing cross rod (A3) and a connecting shaft fixing arm (A4), the lower portion of the reinforcing connecting rod (A1) is fixedly connected with the top end of the reinforcing sliding rod (A2), the bottom end of the reinforcing sliding rod (A2) is connected with the reinforcing cross rod (A3), the top end of the connecting shaft fixing arm (A4) is slidably connected with the reinforcing connecting rod (A1), the bottom end of the connecting shaft fixing arm (A4) is fixedly connected with the reinforcing sliding rod (A2), and the back portions of a first connecting rod (A11) and a second connecting rod (A12) are connected with a spliced segment (1a) through bolt connection;

s3: the foam filling machine (A1a) is installed, the left end and the right end of a reinforcing connecting rod (A1) are respectively provided with a foam filling machine (A1a), the foam filling machine (A1a) comprises a filling injection head (A1A1), a concentrated foam box (A1a2) and a foam sliding rail (A1A3), the working end of the filling injection head (A1A1) penetrates through a splicing inner wall (B1A1) and is arranged in a foam reinforcing layer (B1a2), the rear end of the filling injection head (A1A1) is fixedly connected with the concentrated foam box (A1a2), the concentrated foam box (A1a2) is slidably installed on the foam sliding rail (A1A3), the foam filling machine (A1a) comprises an inductor (A14), an air compressor (A145) and an air pipeline connecting the filling injection head (A1A1) with the air compressor (A15), and an air pipeline connecting the filling injection head (A15) with a filling injection pressure regulating valve (A585 a) and an injection pressure regulating valve (A57323);

s4: the reinforcing method is characterized in that a reinforcing cross bar (A3) comprises a first swing plate (A31) and a second swing plate (A32), the first swing plate (A31) is arranged on the upper portion of the left end of a reinforcing cross bar (A3), the second swing plate (A32) is arranged on the upper portion of the right end of the reinforcing cross bar (A3), the left end of the reinforcing cross bar (A3) is connected with a first sliding rod (A21) through the first swing plate (A31), the right end of the reinforcing cross bar (A3) is connected with a second sliding rod (A22) through the second swing plate (A32), when the segment receives pressure movement, the first sliding rod (A21) is fixed on a tunnel through a bottom sliding bolt, the first sliding rod (A21) can move in a reinforcing cross bar (A3) by less than 45 degrees through an included angle of the first swing plate (A31), and the second sliding rod (A22) can move in a second swing plate (A32) by less than 45-3) through an included angle of the reinforcing cross bar movement, the connecting shaft fixing arm (A4) drives the reinforcing connecting rod (A1) and the reinforcing sliding rod (A2) to move, and the tunnel segment is subjected to fine adjustment when the tunnel segment receives irregular pressure movement, so that the segment cannot shift;

s4: the broken restoration of section of jurisdiction, when the section of jurisdiction appears owing to groundwater pressure increase, the crack is sensed to the inside inductor of foam filling machine (A1a) of locating on consolidating connecting rod (A1), the solenoid valve is opened and is driven the air-vent valve and carry out pressure release, the air-vent valve release back, the air compressor machine is injected the foam reinforcing layer (B1a2) into through filling injection head (A1A1) with the reinforcing foam in concentrated foam case (A1a2), the foam hardens rapidly, avoid the crack increase or a large amount of infiltration to lead to the section of jurisdiction complete breakage.