CN115977662A - Construction method for transverse movement in shield station and construction method for station crossing in shield station - Google Patents

Abstract

The invention relates to the technical field of underground shield construction, in particular to a construction method for transverse movement in a shield station and a construction method for station crossing in the shield station, wherein the construction method for transverse movement in the shield station comprises the following steps: step A: setting an expansion section, and B: the shield machine is connected with the bracket, and the step C: the shield machine and the bracket are transversely moved, under the condition that the contour line axial coverage area of the shield machine conflicts with the standard end side wall of a station, an expansion section is arranged at a cave entrance, a moving area is provided for the shield machine, a transverse moving track plate and a first jack are arranged in the station, after the shield machine reaches the station expansion section, the shield machine is removed from being connected with a rear matching trolley, the shield machine is connected with the bracket, the bracket is transversely moved for a certain distance on the transverse moving track plate through the pushing of the first jack, the contour line axial coverage area of the shield machine is staggered with the standard end side wall of the station, and the shield machine and the bracket can smoothly pass through the standard section to realize station crossing.

Description

Construction method for transverse movement in shield station and construction method for station crossing in shield station

Technical Field

The invention relates to the technical field of underground shield construction, in particular to a construction method for transverse movement in a shield station and a construction method for station crossing in the shield station.

Background

With the development of the urbanization process, the population density of urban areas is higher and higher, the traffic jam problem is more and more serious, and the subway plays an irreplaceable role in solving the urban traffic jam as an important part of three-dimensional traffic. The subway tunnel is constructed by adopting a shield method, when the shield machine needs to be transferred to the next construction after completing one construction, a shield machine assembly is generally lifted out of the ground through a shield machine lifting port by adopting a lifting device, the shield machine is transported to a new construction point through ground transportation equipment, then the shield machine assembly is lowered to a new shield excavating position from the shield machine lifting port by adopting the lifting device again, and then the shield machine is reassembled.

As shown in fig. 2, when the shield tunneling machine 1 performs in-station crossing, the standard section 31 of the station is narrowed because the left line and the right line of the station are relatively close to each other, and at the receiving end and the originating end of the station, because the shield contour line axial coverage area 11 of the shield tunneling machine 1 conflicts with the standard end side wall 311 of the station, the shield tunneling machine 1 cannot directly move forward to perform in-station crossing, which brings great difficulty to the subsequent secondary shield originating operation.

Therefore, in order to solve the above problems, a construction method for the shield station inner transverse movement and a construction method for the shield station inner station crossing are needed to solve the problem of the station inner station crossing under the condition that the shield machine contour line axial coverage area conflicts with the station standard end side wall.

Disclosure of Invention

The invention aims to: aiming at the problems in the background technology, the construction method for the inner transverse movement of the shield station and the construction method for the inner station crossing of the shield station are provided, so that the problem of the inner station crossing under the condition that the axial coverage area of the contour line of the shield machine conflicts with the standard end side wall of the station is solved, and the inner station crossing of the shield station is realized.

In order to achieve the above object, the present invention provides the following technical solutions:

a construction method for transverse movement in a shield station comprises the following steps:

step A: setting an expansion section: arranging the expansion section at the tunnel portal, and arranging a transverse rail plate in the expansion section;

and B, step B: the shield machine is connected with the bracket: separating the shield tunneling machine from a rear matching trolley, connecting the shield tunneling machine to the top of a bracket, and placing the bracket on the transverse rail plate;

step C: the shield machine and the bracket are transversely moved: and arranging a first jack in the expansion section, pushing the bracket through the first jack, and pushing the bracket through the first jack to move relative to the transverse moving track plate so that the bracket transversely moves to a transverse moving end position through the transverse moving track plate.

The construction method for the shield machine to transversely move in the station comprises the steps that under the condition that the contour line axial coverage area of the shield machine conflicts with the standard end side wall of the station, an expansion section is arranged at a cave entrance to provide a moving area for the shield machine, a transverse moving track plate and a first jack are arranged in the station, after the shield machine reaches the station expansion section, the connection between the shield purchasing machine and a rear matching trolley is released, the shield purchasing machine is connected with a bracket, and the bracket is transversely moved for a certain distance on the transverse moving track plate through the pushing of the first jack, so that the contour line axial coverage area of the shield machine is staggered with the standard end side wall of the station, and the shield machine and the bracket can smoothly pass through the standard section to realize station crossing.

Preferably, the step A further comprises the step of arranging a base plate on the surface of the bottom plate of the expansion section, wherein the traverse rail plate is fixed on the base plate; and/or, the step B further comprises: the bracket is assembled by section steel, a sliding plate is arranged at the bottom of the bracket, and lubricating oil is smeared between the sliding plate and the transverse moving track plate. In the step A, the transverse moving track plate is fixed on the backing plate, so that the transverse moving track plate is prevented from sliding in the transverse moving process of the shield tunneling machine, and meanwhile, the elevation of the transverse moving track plate can be adjusted by adjusting the thickness of the backing plate, so that the elevation of the top of the bracket on the transverse moving track plate is adjusted, the elevation of the top of the bracket is consistent with the elevation of the bottom of the shield tunneling machine when the shield tunneling machine goes out of a hole, and the shield tunneling machine can conveniently reach the bracket smoothly; in the step B, a sliding plate is provided at the bottom of the carriage, the carriage is moved on the traverse rail plate by sliding between the sliding plate and the traverse rail plate, and further, lubricating oil is applied between the sliding plate and the traverse rail plate to reduce friction between the sliding plate and the traverse rail plate.

Preferably, the first jack is installed on the transverse moving track plate, one end, far away from the bracket, of the first jack is connected with a pushing piece, and one side, far away from the first jack, of the pushing piece is connected to the side wall of the expansion section.

A construction method for passing stations in a shield station comprises the steps that the expansion sections are arranged at a receiving end and a starting end, and the transverse rail plates are arranged in the expansion sections;

the construction method also comprises the following steps:

s1, transversely moving the shield machine to the transverse moving end position based on the construction method for transversely moving the shield machine in the shield station;

step S2: jacking the shield tunneling machine: after the shield tunneling machine transversely moves to the transverse movement end position in the expansion section of the receiving end, arranging a second jack on the ground of the receiving end, jacking the shield tunneling machine upwards to a specified height through the second jack, laying a track on the longitudinal movement path of the bracket, and enabling the shield tunneling machine to be in sliding fit with the track, wherein the track comprises a first track, a second track and a third track, the first track is laid in the expansion section of the receiving end, the third track is laid in the expansion section of the originating end, and the second track is connected between the first track and the third track;

and step S3: the shield machine longitudinally moves: installing a counter-force support and a third jack on the rail, pushing the bracket to move longitudinally through the counter-force support and the third jack, and enabling the bracket to move from the receiving end to the designated position of the initiating end through the rail;

and step S4: the shield machine falls: arranging a fourth jack on the ground of the expanded section at the initiating end, separating the shield tunneling machine from the third track through the fourth jack, dismantling the third track, dropping the shield tunneling machine through the fourth jack, and dismantling the third track at the same time, so that the bracket falls on the transverse rail plate;

step S5: the shield tunneling machine reversely moves: and arranging a fifth jack on the side wall of the expanded section at the originating end, and moving the bracket to move reversely relative to the transverse moving track plate through the fifth jack so that the bracket transversely moves to the shield originating position through the transverse moving track plate to complete shield station crossing.

The invention relates to a construction method for crossing in a shield station, which is characterized in that an expanded section is arranged as a transverse moving section of a shield machine to transversely move the shield machine, so that the problem that the shield machine cannot directly cross the station due to the fact that the axial coverage area of the contour line of the shield machine conflicts with the standard end side wall of the station is solved, the shield machine can cross the station in the situation that the axial coverage area of the contour line of the shield machine conflicts with the standard end side wall of the station, namely, the shield machine transversely moves in the expanded section of a receiving end in the station, then longitudinally moves through the standard section of the station to reach an originating end, and then reversely transversely moves in the expanded section of the originating end to reach an originating position, so that the shield machine passes the station, and further secondary originating of the shield machine is realized.

Preferably, the step S2 further includes: the shield constructs the casing of machine and goes up welding jacking atress board, jacking atress board with shield constructs the inside floor of machine corresponding, jacking atress board with the cooperation of second jack, through set up jacking atress board on the shield constructs the machine shell, and jacking atress board and shield construct the inside floor of machine corresponding to avoid at the jacking in-process because shield constructs the too big condition that leads to shield and construct the deformation of machine shell.

Preferably, the rail is a groove-shaped member, and the bottom of the bracket is provided with a rubber plate which is placed inside the notch of the rail. The rubber plate slides in the rail notch, so that the bracket slides on the rail, and the shield tunneling machine moves along the rail.

Preferably, a stainless steel plate is fixed inside the rail notch, and the bottom of the rubber plate is connected with a tetrafluoro plate. Through set up corrosion resistant plate in the track notch, provide the smooth surface when removing for the bracket, and utilize the characteristics that coefficient of friction is little between tetrafluoro board and the corrosion resistant plate, the effectual frictional force that has reduced between block rubber and the track.

Preferably, the counter force support comprises a first counter force support, and a plurality of first counter force supports are arranged at intervals and installed inside the rail notch.

Preferably, the counter force support further comprises a second counter force support, and the second counter force support is detachably mounted on the side wall of the rail.

Preferably, after the station crossing is finished in the shield tunneling machine station, the reaction frame is installed, and after the reaction frame is installed, the rear supporting trolley is connected.

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

1. the construction method for the shield machine to transversely move in the station comprises the steps that under the condition that the contour line axial coverage area of the shield machine conflicts with the standard end side wall of the station, an expansion section is arranged at a cave entrance to provide a moving area for the shield machine, a transverse moving track plate and a first jack are arranged in the station, after the shield machine reaches the station expansion section, the connection between the shield purchasing machine and a rear matching trolley is released, the shield purchasing machine is connected with a bracket, and the bracket is transversely moved for a certain distance on the transverse moving track plate through the pushing of the first jack, so that the contour line axial coverage area of the shield machine is staggered with the standard end side wall of the station, and the shield machine and the bracket can smoothly pass through the standard section to realize station crossing.

2. The construction method for crossing in the shield station provided by the invention has the advantages that the expansion section is arranged as the transverse moving section of the shield machine to transversely move the shield machine, so that the problem that the shield machine cannot directly pass due to the conflict between the axial coverage area of the contour line of the shield machine and the standard end side wall of the station is solved, the shield machine can pass in the station under the condition that the axial coverage area of the contour line of the shield machine conflicts with the standard end side wall of the station, namely, the shield machine transversely moves in the expansion section of the receiving end in the station, then longitudinally moves through the standard section of the station to reach the originating end of the station, and then reversely transversely moves in the expansion section of the originating end to reach the originating position to realize shield passing, so that secondary originating of the shield machine is realized.

Description of the drawings:

FIG. 1 is a flow chart of a traversing in a shield station.

Fig. 2 is a schematic top view of the station bottom.

Fig. 3 is a schematic front view of a station.

Fig. 4 is a front view of the shield tunneling machine in the station in cooperation with the bracket.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is a top view of the shield tunneling machine in the station in cooperation with the bracket.

Fig. 7 is a schematic diagram of the connection between the shield tunneling machine and the bracket in the station.

FIG. 8 is a schematic view of the shield tunneling machine traversing with the carriage to a traverse end position.

Fig. 9 is a partially enlarged view of fig. 8.

Fig. 10 is a schematic diagram of the moving direction of the station-passing in the shield machine station.

Fig. 11 is a first schematic diagram (front view) of shield machine jacking.

Fig. 12 is a second schematic diagram (side view) of shield machine jacking.

Fig. 13 is a partially enlarged view of fig. 12.

Fig. 14 is a schematic view of track laying in a station.

Fig. 15 is a schematic diagram of a station crossing in a shield tunneling machine station.

Fig. 16 is a first shield machine drop diagram (before dropping).

Fig. 17 is a second schematic diagram of the shield tunneling machine falling (after falling).

FIG. 18 is a schematic view of a reverse traverse of a shield tunneling machine. .

Figure 19 is a schematic view of a rear mating trolley and reaction frame in cooperation with a shield machine.

Fig. 20 is a first (bottom) view of the bracket structure.

Fig. 21 is a second (side view) schematic diagram of the bracket structure.

Figure 22 is a schematic view of the carriage and rail connection.

FIG. 23 is a first schematic view of the first reaction force bracket coupled to the rail.

FIG. 24 is a second schematic view of the first reaction force carrier coupled to the rail.

FIG. 25 is a first schematic view of the second reaction force carrier being coupled to the rail.

FIG. 26 is a second schematic view of the second reaction force carrier coupled to the rail.

Fig. 27 is a schematic view of an inter-track connection.

Fig. 28 is a schematic diagram of a limiting plate of the rail.

Fig. 29 is a schematic view of an L-shaped stopper of the rail.

The mark in the figure is: 1-shield machine, 11-shield contour line axial coverage area, 2-enlarged section, 3-bracket, 301-sliding plate, 4-transverse rail plate, 5-first jack, 6-second jack, 7-rail, 71-first rail, 72-second rail, 73-third rail, 8-counter force support, 81-first counter force support, 82-second counter force support, 821-clamping groove, 822-thrust steel plate, 823-cushion block, 824-baffle, 9-third jack, 10-fourth jack, 11-fifth jack, 12-backing plate, 13-connecting plate, 14-fixing plate, 15-pushing piece, 16-reinforcing piece, 17-jacking stress plate, 18-supporting seat, 19-rail support, 20-rubber plate, 21-stainless steel plate, 22-tetrafluoro plate, 23-limiting plate, 231-first reinforcing plate, 232-second reinforcing plate, 24-L-type limiting piece, 241-L-type steel plate, 241-L-reinforcing plate, 25-reinforcing plate, 27-stainless steel plate, 27-tetrafluoro plate, 23-limiting plate, 231-first reinforcing plate, 232-second reinforcing plate, 24-L-type reinforcing plate, 291-embedded part, 27-embedded part matching frame, 33-rear side wall-supporting frame, 33-supporting frame, and matching frame.

Detailed Description

The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter of the present invention is not limited to the following examples, and any technique realized based on the contents of the present invention is within the scope of the present invention.

Example 1

As shown in fig. 1 to 9, a construction method for transversely moving in a shield station comprises the following steps:

step A: setting an expansion section 2: as shown in fig. 2, an expansion section 2 is arranged at the tunnel portal, the distance from the side wall of the expansion section 2 to the edge of the shield machine 1 is greater than the distance from the side wall 311 of the standard section to the edge of the shield machine 1, and a plurality of transversely arranged profiled steel plates are arranged in the expansion section 2 as transverse rail plates 4, as shown in fig. 6;

and B: the shield machine 1 is connected with the bracket 3: before the shield machine 1 moves transversely, the shield body needs to be separated from a rear matching trolley 27, water, electricity and liquid joints are disassembled, and all lines and pipeline joints are disassembled to be plugged and wrapped, so that the pipelines and cable joints are prevented from being polluted; as shown in fig. 7, a plurality of connecting plates 13 are adopted to temporarily butt-weld the bracket 3 and the shell of the shield tunneling machine 1 at corresponding side points and middle points of the shield tunneling machine 1 to form a whole, so as to ensure that the bracket 3 moves along with the shield tunneling machine 1 in the processes of transverse movement, jacking, longitudinal movement and descending of the shield tunneling machine 1; as shown in fig. 4 to 5, and the carriage 3 is placed on the traverse rail plate 4;

and C: the shield machine 1 and the bracket 3 move transversely: as shown in fig. 8 to 9, a first jack 5 is provided in the expanding section 2, and the bracket 3 is pushed by the first jack 5, so that the bracket 3 is moved to the end position of the traverse movement through the traverse movement track plate 4.

The construction method for the shield machine to transversely move in the station comprises the steps that under the condition that the contour line axial coverage area of a shield machine 1 conflicts with a standard end side wall of the station, an expansion section 2 is arranged at a tunnel portal to provide a moving area for the shield machine 1, a transverse track plate 4 is arranged in the expansion section 2, a bracket 3 is arranged to transport the shield machine 1, the transverse movement of the shield machine 1 in the expansion section 2 is realized through the cooperation of the bracket 3, the transverse track plate 4 and a first jack 5, the contour line axial coverage area of the shield machine 1 is staggered with the standard end side wall of the station, and therefore subsequent shield machines 1 can conveniently pass the station.

According to a preferable mode, a fixed stop block is arranged at the transverse moving end point position through measurement before transverse moving, and the stop block is fixed on the concrete surface of the structural bottom plate of the station in a rib planting mode and used as displacement limit for pushing operation; as shown in fig. 8-9, the shield machine 1 and the bracket 3 adopt a plurality of first jacks 5 to move transversely, and are controlled by a hydraulic pump station, in the transverse moving process of the bracket 3, the jacking speed of each first jack 5 is controlled within the same range, so that each first jack 5 has higher synchronism, monitoring is performed in the process, transverse moving is timely adjusted when deviation occurs, and it is ensured that the central axis of the shield machine keeps consistent with the axis of a station, further, a stopper 26 is arranged on one side of the bracket 3 to limit longitudinal deviation of the shield machine 1 in the transverse moving process, and adjustment is performed when longitudinal deviation occurs, as shown in fig. 6.

A preferred mode, as shown in fig. 9, a plurality of embedded steel bars are embedded in the side wall of the station expansion section 2 corresponding to the lateral movement pushing position of the bracket 3, the embedded steel bars are arranged in three rows and two columns on the wall surface of the side wall, the row spacing is 200mm, the row spacing is 300mm, the bottom row of steel bars is 100mm from the chamfer, a fixing plate 14 is installed on the embedded steel bars, hole sites corresponding to the embedded steel bars are provided on the fixing plate 14, the embedded steel bars pass through the hole sites on the fixing plate 14 to fix the fixing plate 14 on the side wall, further, the first jack 5 is horizontally installed on the lateral movement track plate 4, a pushing piece 15 is installed on the fixing plate 14, one end of the pushing piece 15 is welded on the fixing plate 14, the other end is connected with the first jack 5 to provide a reaction force for the first jack 5, in this scheme, the elevation of the connection between the fixing plate 14 and the pushing piece 15 is higher than the first jack 5, the pushing piece 15 is obliquely arranged, the pushing piece 15 is close to the end of the first jack 5, so as to prevent the pushing piece 15 from being installed on the side wall of the first jack, and the lateral movement track plate 2 to stabilize the expansion section, thereby, the expansion of the side wall, the expansion section is formed by the triangular support plate 2, the triangular support.

In a preferred mode, as shown in fig. 9, after the first jack 5 is jacked to reach the stroke, the force is removed, the first jack 5 is contracted to the initial state, then the lengthening piece 16 is additionally arranged between the first jack 5 and the bracket 3, the first jack 5 is started to perform jacking operation, and the jacking operation is repeated until the transverse movement end position is reached, and the jacking operation is stopped, wherein the lengthening piece 16 is made of profile steel.

A preferable mode, as shown in fig. 5, a backing plate 12 is disposed on the surface of the bottom plate of the enlarged segment 2, a traverse track plate 4 is welded on the backing plate 12 to prevent the traverse track plate 4 from sliding during the traverse of the shield machine 1, further, when the shield machine 1 goes out of the receiving end, a certain distance exists between the bottom of the shield machine 1 and the top of the bracket 3, which results in that the shield machine 1 cannot be stably placed on the top of the bracket 3, so the distance between the bottom of the shield machine 1 and the top of the bracket 3 needs to be measured and calculated in advance, and the traverse track plate 4 is lifted by adjusting the thickness of the backing plate 12, so that the top of the bracket 3 is lifted to the same height as the bottom of the shield machine 1, and the shield machine 1 can smoothly reach the bracket 3.

In a preferred mode, as shown in fig. 5, a sliding plate 301 is provided at the bottom of the carriage 3, and the carriage 3 can be easily moved on the traverse rail plate 4 by sliding the sliding plate 301 and the traverse rail plate 4 with each other.

In a preferred embodiment, a lubricant is applied between the sliding plate 301 and the lateral rail plate 4, and the friction between the sliding plate 301 and the lateral rail plate 4 is reduced by the lubricant.

In the existing shield transverse moving construction operation, most of the shield machine 1 is dragged to move by using a rope or a pull rod, the self weight of the shield machine 1 is too large, the rope or the pull rod is stressed greatly during dragging, the rope or the pull rod is extremely easy to break, an operator is required to monitor the dragging operation condition of the shield machine 1 around the shield machine 1 during dragging, once the rope or the pull rod breaks, the condition of hurting people is extremely easy to occur, the safety risk is very high, and due to the fact that the rope or the pull rod is stressed greatly, embedded parts of a traction point are required to be arranged very large and are not easy to install in a station, later cleaning is also extremely troublesome, furthermore, the dragging speed of multiple points cannot be accurately controlled during dragging by the rope or the pull rod, the synchronism is poor, the shield machine 1 cannot be guaranteed not to deviate during transverse moving, and further, when the rope or the pull rod is adopted, a large diameter needs to be selected, the embedded parts of the traction point are correspondingly increased, the construction cost is greatly increased, the method for transversely moving the shield machine in the shield station has the advantages that a plurality of jacks are reliably controlled, the shield machine is high-safety and the shield machine is operated at a high-safety and the high-speed control accuracy, and the shield machine is realized, and the shield machine is more than the high-control jack control efficiency.

Wherein, the longitudinal direction appearing in the present specification refers to the direction along the center line of the station line, and the transverse direction appearing in the present specification refers to the direction perpendicular to the center line of the station line.

In fig. 2, a is a right line center line, and B is a left line center line.

Example 2

On the basis of embodiment 1 of the present application, as shown in fig. 10 to 18, a construction method for passing in a shield station, in which an expansion section 2 is provided at both a receiving end and a starting end, and a transverse rail plate 4 is provided in each expansion section 2, further includes the following steps:

s1, transversely moving a shield machine 1 to a transverse moving end position based on the construction method for transversely moving in the shield station in the embodiment 1;

step S2: jacking a shield tunneling machine 1: as shown in fig. 11 to 14, after the shield tunneling machine 1 moves to the end of the transverse movement in the enlarged section 2 of the receiving end, a second jack 6 is provided on the ground of the receiving end, the shield tunneling machine 1 is lifted up to a designated height by the second jack 6, and a rail 7 is laid on the longitudinal movement path of the carriage 3, and the shield tunneling machine 1 is slidably engaged with the rail 7, wherein the rail 7 includes a first rail 71, a second rail 72, and a third rail 73, the first rail 71 is laid in the enlarged section 2 of the receiving end, the third rail 73 is laid in the enlarged section 2 of the originating end, and the second rail 72 is connected between the first rail 71 and the third rail 73;

in a preferred mode, as shown in fig. 13, a jacking stress plate 17 is welded on a shell of a shield machine 1, the jacking stress plate 17 corresponds to a rib plate inside the shield machine 1, when the shield machine 1 is operated on the top, the top of a second jack 6 abuts against the stress plate 17, the shield machine 1 is jacked through the stress plate 17, so that the shield shell is prevented from deforming due to the fact that the second jack 6 directly abuts against a shield body in a stress process, further, the jacking stress plate 17 is welded on the shell by using three triangular steel plates 391 × 300 × 20mm, the interval between the triangular steel plates is 150mm, a 300 × 300 × 20 steel sealing plate is welded on the bottom edge of the triangular plate group, and a 391 × 300 × 20mm steel sealing plate is welded on the side surface, so that the uniform stress of the three steel plates is ensured.

In a preferred mode, as shown in fig. 12-13, since the maximum extending length of the second jack 6 is 20cm, in order to ensure effective holding force of the second jack 6, it is required that the maximum lifting stroke of the second jack 6 during operation does not exceed 18cm, before jacking the shield tunneling machine 1, placing a first square stool at the bottom of the second jack 6 as a supporting seat 18 so that the second jack 6 can abut against a jacking stressed plate 17 on the shield tunneling machine 1, then slowly jacking the second jack 6 upwards to 18cm, locking so that the bracket 3 is lifted upwards, then placing a second square stool at the bottom of the bracket 3, one square stool every four meters, then unloading the second jack 6 so that the bracket 3 falls onto the second square stool, i.e. allowing the second square stool to bear the gravity of the bracket 3 and the shield tunneling machine 1, then adding a third square stool on the supporting seat 18 at the bottom of the second jack 6 so that the height of the supporting seat 18 is increased, then allowing the second jack 6 to lift again by 18cm, so that the bracket 3 is lifted again, and then increasing the height of the supporting seat 18 of the second square stool gradually at the supporting seat 18 and lifting steps are repeated.

As shown in fig. 13-14, at the expanded section 2 at the receiving end of the station, after the shield tunneling machine 1 is jacked to a specified height, the second jack 6 is locked, and since the elevation of the bottom plate of the expanded section 2 arranged at the receiving end and the starting end of the station is smaller than that of the bottom plate of the standard section 31 of the station, a rail support 19 needs to be laid on the bottom plate of the expanded section 2, so that when the expanded section 2 at the subsequent receiving end, the standard section 31 and the expanded section 2 at the starting end lay the rail 7, the bottoms of the rails 7 of all parts can be flush; the track support piece 19 is transversely arranged perpendicular to the central line of the station line, the distance between the track support pieces 19 is not more than 400mm, then a first track 71 is laid on the track support piece 19, the first track 71 is positioned between the bracket 3 and the track support piece 19, the first track 71 is parallel to the axis of the station, furthermore, a limiting steel plate is welded on the first track 71 and the track support piece 19, so that the first track 71 is fixedly connected with the track support piece 19, and the first track 71 is prevented from deforming and bending in the longitudinal movement process of the subsequent shield tunneling machine 1; after the first rail 71 is laid, the second jack 6 is adjusted to drop the bracket 3 on the first rail, and then the square stool is removed step by step.

As shown in fig. 14, a second track 72 is laid in the station standard section 31, a third track 73 is laid in the expanded section 2 at the initiating end, the second track 72 and the first track 71 are on the same straight line and at the same height, and the third track 73 and the second track 72 are on the same straight line and at the same height;

when the second track 72 is laid in the station standard section 31, before the laying, the floor of the station needs to be leveled off before the laying, the protruding part is chiseled by the air pick, and then mortar is used for leveling, when the laying is performed, the second track 72 needs to be parallel to the axis of the station, the distance between the second track 72 and the side wall of the standard section is controlled to ensure that the second track 72 is parallel to the axis of the station, and meanwhile, the central line of the second track 72 and the central line of the first track 71 are located on the same straight line.

When the third track 73 is laid on the initial end expanding section 2, the method is the same as that of the first track 71 laid on the receiving end expanding section 2, the track support piece 19 is firstly laid on the bottom plate surface of the receiving end, then the third track 73 is laid on the track support piece 19, and then the height of the passageway support piece 19 is adjusted to meet the requirement of the initial end of the shield tunneling machine 1, namely the third track 73 and the second track 72 are positioned at the same height, and the central lines of the third track 73 and the second track are positioned on the same straight line.

And step S3: longitudinally moving the shield tunneling machine 1: as shown in fig. 15, after the jacking construction is completed, a counterforce seat 8 is installed on a track 7 behind the shield tunneling machine 1 to provide counterforce for the longitudinal movement of the shield tunneling machine 1 and the bracket 3; the third jack 9 is used as a power mechanism for longitudinal movement of the shield tunneling machine 1, the third jack 9 is installed between the bracket 3 and the counter-force support 8, and a reinforcing plate is arranged at the contact position of the bracket 3 and the third jack 9, so that the bracket 3 is uniformly stressed and is not easy to dent at the contact position of the third jack 9; the bracket 3 is pushed to move longitudinally on the rail 7 through the matching of the counter-force support 8 and the third jack 9, so that the bracket 3 moves from the receiving end to the designated position of the initiating end through the rail 7;

and step S4: the shield tunneling machine 1 falls: as shown in fig. 16 to 17, a fourth jack 10 is provided on the ground of the enlarged section 2 at the initiating end, the shield tunneling machine 1 is separated from the third rail 73 by the fourth jack 10, the third rail 73 is removed, the shield tunneling machine 1 is lowered by the fourth jack (10), and the bracket 3 is dropped on the traverse rail plate 4;

in a preferred mode, as shown in fig. 16, before the shield tunneling machine 1 falls, a plurality of fourth stools are correspondingly arranged at intervals of 4m at the bottom of the bracket 3, during the falling of the shield tunneling machine 1, fourth jacks 10 are installed at positions correspondingly pushing the stress plates 17, the shield tunneling machine 1 is firstly jacked up by the fourth jacks 10 for 2cm to ensure that the bracket 3 is separated from the rail 7, the rail 4 and the rail supporting piece 19 below the bracket 3 are sequentially removed, then the fourth jacks 10 are unloaded to enable the bracket 3 to fall on the fourth stools at the bottom of the bracket 3, after the fourth jacks 10 are unloaded, the height of the supporting seats 18 at the bottom of the fourth jacks 10 is reduced, then the fourth jacks 10 jack the bracket 3 to rise for 1cm, then the height of the fourth stools at the bottom of the bracket 3 is reduced, then the fourth jacks 10 are unloaded to enable the bracket 3 to fall on the fourth stools, and the above procedures are repeated until the bracket 3 stably falls on the cross-passing plate 4 at the starting end in a horizontal moving manner, as shown in fig. 17.

Step S5: the shield tunneling machine 1 reversely moves transversely: as shown in fig. 18, a fifth jack 11 is arranged on the side wall of the expanded section 2 at the originating end, and the bracket 3 is pushed by the fifth jack 11 to move transversely in a reverse direction relative to the transverse rail plate 4, so that the bracket 3 is transversely moved to the shield starting position through the transverse rail plate 4, thereby completing the shield station crossing, wherein the working flow of transversely moving the shield machine 1 in a reverse direction at the originating end is the same as the transverse moving step of the shield machine 1 in the embodiment 1, but the transverse moving direction is opposite;

the construction method for crossing in the shield station, provided by the invention, has the advantages that the expansion section 2 is arranged as the moving interval of the shield machine 1 to transversely move the shield machine 1, so that the problem that the shield machine 1 cannot directly cross under the condition that the contour line axial coverage area 11 of the shield machine 1 conflicts with the standard end side wall 311 of the station is solved, the shield machine can cross in the station under the condition that the contour line axial coverage area 11 of the shield machine conflicts with the standard end side wall 311 of the station, namely, the in-station transverse movement is carried out in the expansion section 2 of the receiving end, then the in-station transverse movement is longitudinally moved to the station originating end through the standard section 31 of the station, then the reverse transverse movement is carried out in the expansion section 2 of the originating end to the originating position, the shield machine crossing is realized, and the secondary originating of the shield is further realized.

In fig. 10, C is the central line of the right line of the station crossing in the shield machine station, and D is the central line of the left line of the station crossing in the shield machine station.

Before the shield tunneling machine 1 reaches a receiving end, retesting the central elevation and the plane position of a tunnel portal at the receiving end so as to adjust the propelling axis of shield tunneling receiving; when the shield machine 1 reaches about 200m in front, performing integral and systematic control measurement retest and joint measurement on all control points in a shield construction section and a station, and performing manual measurement on the retest of a laser total station and the position of a shield machine head; when the shield machine 1 reaches about 50m, the control measurement retest and the joint measurement of the whole and the system are carried out on all the control points in the shield construction section and the station again, the laser total station retest and the shield machine head position are manually measured, and the shield posture is retested so as to adjust the propelling axis received by the shield machine.

When the shield machine reaches the front 50m, retesting the postures of the shield machine 1 and the duct piece every 10m, checking the difference values of the shield machine, the duct piece axis and the tunnel portal axis, and adjusting the postures in time; when the shield machine 1 reaches the tunnel portal, the shield machine 1 is controlled to be in a vertical posture relative to the tunnel portal, the head of the shield machine is controlled to be 0 to 50mm, and the tail of the shield machine 1 is controlled to be-50 to 0mm; the horizontal posture of the shield machine 1 relative to the tunnel portal is controlled in a range of +/-30 mm at the head of the shield machine and +/-30 mm at the tail of the shield machine.

When the shield tunneling machine 1 reaches a tunnel portal, the axial elevation of the bracket 3 is within-20-0 mm of the axial line of a cutter head of the shield tunneling machine, and the horizontal posture is controlled within +/-10 mm of the axial line of the shield tunneling machine; the rolling angle of the shield tunneling machine 1 is not more than 0.2 degrees.

The measurement before the shield penetration is an important basis for rechecking the direction of the shield, confirming the shield posture, evaluating the posture during shield reception, drawing up the construction axis of the shield receiving section, the control value of the propulsion gradient, the construction scheme and the like, so that the shield is always implemented according to the preset scheme in the construction of the stage, is received in a good posture and is accurately positioned on the shield receiving base.

Before the shield machine 1 passes the station, the following conditions are required to be met:

s11: the construction of the portal at the receiving end and the initiating end is finished, and the sealing construction of the steel ring and the portal is finished to meet the receiving and initiating conditions;

s12: the negative four-layer support meets the support removal condition, and the support removal in the shield station-crossing area is completed, so that the shield station-crossing requirement is met;

s13: the embedded steel plate of the wellhead at the starting end is embedded, the installation requirements of the reaction frame 29, the inclined strut 32 and the bracket 3 are met, and shield starting conditions are met;

s14, hardening the earth surface of the receiving end to meet the requirements of 100t of truck crane stations. The wellhead meets the hoisting requirements of the bracket 3, the PC60 excavator, the reaction frame 29, the section steel and other objects; the receiving end part is provided with a first layer negative layer, a second layer negative layer and a third layer negative layer which are provided with mechanical wind holes and piston wind holes, the mechanical wind holes can be used for end part slag tapping hoisting and material hoisting, and mechanical hoisting holes of 7.5m multiplied by 2.65m are reserved on a left line top plate and a right line top plate;

s15: finishing the construction of the three-layer middle plate at the starting end, presetting lifting holes for mounting and dismounting the reaction frame 29 and dismounting the negative ring, wherein 31 lifting holes are arranged on the left line of the reaction frame 29 and the position of the duct piece, 28 lifting holes are arranged on the right line, and the diameter of each lifting hole is phi 100mm;

s16, finishing the machining of the bracket 3;

s17: preparing an electric hoist: because the receiving end bottom plate is less than station standard section bottom plate, first track 71 need be laid after the jacking of shield constructs machine 1, because single heavier of first track 71, consequently need adopt instrument assistance to remove, take the pre-buried U shaped steel bar of the former big steel mould of station structure chamfer to provide the fixed point for electric block pulls.

In a preferred mode, as shown in fig. 17 and 21, a bracket rail 34 is provided at an upper portion of the bracket 3, the shield tunneling machine 1 is placed on the bracket rail 34 of the bracket 3 when the shield tunneling machine 1 is engaged with the bracket 3, after the shield tunneling machine 1 moves in a reverse direction to a designated position, a bracket jack 33 is installed on the bracket rail 34 before the shield tunneling machine 1 is ready for performing originating shield, and the shield tunneling machine 1 is pushed by the bracket jack 33 to move on the bracket rail 34, so that a distance from the shield tunneling machine 1 to an originating portal is adjusted, and the shield tunneling machine 1 is convenient for performing secondary originating.

In a preferred mode, as shown in fig. 19, since the reaction frame 29 provides a reaction force for shield initiation, when the reaction frame 29 is installed, the end face of the reaction frame 29 needs to be perpendicular to the horizontal shaft of the initiation table so as to control the shield tunneling machine to tunnel along a set axial direction; during installation, the gap between the reaction frame 29 and the structural connection part of the initial end expanding section 2 is tamped by a steel plate to ensure that the reaction frame 29 has enough compressive strength, and is reinforced by the inclined strut 32, and after the first ring negative ring pipe piece is installed, the negative ring pipe piece is timely connected with the reaction frame 29 by the pipe piece bolt to prevent the pipe piece from being dislocated with the end face of the reaction frame under the thrust state.

After the reaction frame 9 and the reference ring are positioned, the reaction frame 29 and the reaction frame embedded parts 291 of the station middle plate and the station bottom plate are welded and fixed, and then the rear inclined strut 32 is welded and fixed, all welding seams are ensured to be full and continuous, wherein one end of the inclined strut 32 is fixedly connected with the reaction frame 29, the other end of the inclined strut is fixedly fixed with the inclined strut embedded parts 321, and the welding seams of the reaction frame 29 need to be subjected to nondestructive inspection.

In a preferable mode, a rear matching trolley 27 of the shield reaches an initial end from a receiving end in an in-station passing mode to be in butt joint with the shield machine 1, the rear matching trolley 27 adopts a capacitor locomotive to drag, and a cross arm is welded on a locomotive pipe sheet trolley and used for supporting and fixing an equipment bridge; the rear supporting trolley 27 should be additionally laid with a rear supporting trolley track 28, each pipeline should be checked during the dragging process of the rear supporting trolley 27, and damage caused by floor rolling and pulling of the pipeline is avoided, further, since the minimum clear distance between the central line of the track line and the side wall 311 of the standard section of the station is 2.15m, the rear supporting trolley 27 collides with the side wall 311 of the standard section of the station when going out of the hole from the receiving end hole, in order to ensure that the rear supporting trolley 27 can smoothly pass through the station, the central line of the shield rear supporting trolley 27 at the receiving end expanded section 2 and the originating end expanded section 2 needs to be adjusted, the adjustment line is as follows, the clear distance between the adjusted travelling center line and the side wall of the standard section is 3.39m, the length of the deformation section of the rear supporting trolley track 28 is 13.0m, the rear supporting trolley track 28 rotates 5 degrees in the direction of the central line of the track line, and the radius of the deformation section of the rear supporting trolley track 28 is 50m.

Example 3

On the basis of embodiment 2 of the application, as shown in fig. 21-22, the rail 7 is a groove-shaped member, a notch of the rail 7 is arranged upwards when the rail 7 is laid, and the bracket 3 participates in the transverse movement and longitudinal movement construction of the shield tunneling machine 1, so that a plurality of rubber plates 20 are installed at the bottom of the bracket 3, as shown in fig. 20, the rubber plates 20 are placed inside the notches of the rail 7, and slide inside the notches of the rail 7 through the rubber plates 20, so that the sliding of the bracket 3 on the rail 7 is realized, and the shield tunneling machine 1 moves along the rail 7, further, the rubber plates 20 slide in the notches of the rail 7, and provide a certain height for the bracket 3 due to the height of the rubber plates 20, so that a certain gap is formed between the bottom of the bracket 3 and the top of the rail 7, and the friction between the bottom of the bracket 3 and the top of the rail 7 when the shield tunneling machine 1 slides is reduced.

According to a preferable mode, as shown in fig. 22, a stainless steel plate 21 is fixed inside a notch of a track 7, a tetrafluoro plate 22 is connected to the bottom of a rubber plate 20, the stainless steel plate 21 is arranged in the notch of the track 7 to provide a smooth surface for the movement of a bracket 3, and the characteristic that the friction coefficient between the tetrafluoro plate 22 and the stainless steel plate 21 is small is utilized, so that the friction force between the rubber block 20 and the track 7 is effectively reduced, further, four edges and corners of the tetrafluoro plate 22 in the sliding direction need to be polished before installation, circular arcs with the radius of 5mm are polished, and the bracket 3 is ensured not to be affected by assembled edges and corners in the moving process on the track 7.

As shown in fig. 28-29, a limiting plate 23 is welded at the head of the single-section rail 7, an L-shaped limiting member 24 is welded at the tail of the single-section rail 7, the limiting plate 23 is composed of a first stiffening plate 231 and a second stiffening plate 232, the first stiffening plate 231 and the second stiffening plate 232 are vertically welded on the side wall of the rail 7, and the length of the welding line of the limiting plate 23 is not less than 400mm; the L-shaped limiting piece 24 is composed of an L-shaped steel plate 241 and a reinforcing plate 242, the L-shaped steel plate 241 is welded to the side wall of the track 7 in an attaching mode, the reinforcing plate 242 is welded to the L-shaped steel plate 241, the limiting plate 23 and the L-shaped limiting piece 24 are welded through right-angle fillet welds, and the height of the welds is not smaller than 6mm; when the rails 7 are laid, the head of one rail 7 is combined with the tail of the other rail 7, that is, the limit plate 23 at the head of one rail 7 is embedded into the L-shaped limit member 24 at the tail of the other rail 7, so that the two rails 7 are connected together, as shown in fig. 27.

According to a preferable mode, in the longitudinal moving process of the shield tunneling machine 1, the single track 7 is transported, the separated single track 7 is placed on a track transport vehicle, the track transport vehicle is composed of 3 steel flat trolleys, the size of each single four-wheel flat trolley is 750 multiplied by 500mm, the maximum allowable load is 2t, in order to prevent the deformation of the single track 7, the 3 small trolleys are longitudinally arranged, the distance between the small trolleys is 4m, the track transport vehicle is formed by welding steel pipes, the single track 7 is moved to the front of the shield tunneling machine 1 through manually pushing the transport vehicle, the front end of the other track 7 is spliced again, and the sequential circulation is carried out until the longitudinal moving of the shield tunneling machine 1 is completed.

As shown in fig. 23-24, the first reaction support 81 is made of steel, and is installed inside the notch of the rail 7, the side wall of the rail 7 and the first reaction support 81 are fixed by bolts, because the side wall of the rail 7 has a small thickness and needs to be provided with a hole slightly larger than the diameter of the bolt, the side wall of the rail 7 in the area of the notch is reinforced, the reinforcing plate 25 is welded on the side wall of the rail 7 to bear force together, the welding rod is of E43 type, the welding line is a right-angle fillet welding line, the length of the welding line is 1000mm, the height of the welding line is 6mm, and the reinforcing position of the first reaction support 81 is arranged on the rail steel at an interval of 1.5m.

In the shield station-crossing construction process, the construction efficiency is considered, so after the third jack 9 reaches the maximum stroke, the reaction force can be transmitted by adding the lengthening piece 16 in front of the first reaction support 81, as shown in fig. 18, the lengthening piece 16 is made of HW350 × 350 section steel, and the length of the lengthening piece 16 cannot exceed 1.5m. And the shield tunneling machine 1 and the bracket 3 are longitudinally moved from the receiving end to the large initiating end through the first counter force support 81, the lengthening piece 16 and the third jack 9, and the longitudinal movement construction of the shield tunneling machine is completed.

In a preferred mode, as shown in fig. 25 to 26, the second reaction force support 82 is composed of a clamping groove 821 and a thrust steel plate 822, the clamping groove 821 can be formed by assembling and welding three steel plates with the thickness of 30mm, welding lines are ground after welding, flaw detection is carried out, and the reaction force support can be used after being qualified or can be manufactured integrally. At least four screw thread holes are equidistantly machined in one side wall of the clamping groove 821, wherein the diameter of each screw thread hole is slightly larger than that of a bolt to be installed inside, so that the bolt is ensured to be matched with the screw thread holes. The top surface central line welding of thrust steel sheet 822 along draw-in groove 821 roof adopts bilateral full weld for guaranteeing that thrust steel sheet 822 is connected firmly with draw-in groove 821, polishes the welding seam after welding and detects a flaw.

When installing draw-in groove 821 on 7 flange boards of track, with draw-in groove 821 opening down during the installation, make 7 lateral wall of track be located draw-in groove 821 opening, then respectively place a cushion 823 in the space that 7 lateral wall of track and draw-in groove 821 inboard formed, draw-in groove 821 trompil lateral wall passes through the mode of bolt tightening, act on pressure cushion 823, make cushion 823 and 7 lateral wall static friction increase, provide sufficient reaction force for draw-in groove 821, furtherly, baffle 824 has been placed between thrust steel plate 822 and the third jack 9, baffle 824 acts on between thrust steel plate 822 and the third jack 9, provide construction platform for the top pushing operation of third jack 9.

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 (10)

1. A construction method for transversely moving in a shield station is characterized by comprising the following steps:

step A: setting an expansion section (2): arranging the expansion section (2) at the tunnel portal, and arranging a transverse rail plate (4) in the expansion section (2);

and B: the shield machine (1) is connected with the bracket (3): separating the shield machine (1) from a rear matched trolley (27), connecting the shield machine (1) to the top of the bracket (3), and placing the bracket (3) on the transverse moving track plate (4);

and C: the shield machine (1) and the bracket (3) move transversely: the side wall of the expansion section (2) is provided with a first jack (5), and the bracket (3) moves relative to the transverse moving track plate (4) through the pushing of the first jack (5), so that the bracket (3) is transversely moved to a transverse moving end position through the transverse moving track plate (4).

2. The method for constructing the inner transverse movement of the shield station as claimed in claim 1,

the step A also comprises the step of arranging a base plate (12) on the surface of the bottom plate of the expanding section (2), and fixing the transverse rail plate (4) on the base plate (12);

and/or the presence of a gas in the atmosphere,

the step B further comprises the following steps: the bracket (3) is assembled by section steel, a sliding plate (301) is arranged at the bottom of the bracket (3), and lubricating oil is smeared between the sliding plate (301) and the transverse moving track plate (4).

3. The construction method for the transverse movement in the shield station as claimed in claim 1, wherein the first jack (5) is installed on the transverse movement track plate (4), one end of the first jack (5) far away from the bracket (3) is connected with a pushing piece (15), and one side of the pushing piece (15) far away from the first jack (5) is connected to the side wall of the expansion section (2).

4. The construction method for passing stations in the shield station is characterized in that the expansion sections (2) are arranged at the receiving end and the starting end, and the transverse rail plates (4) are arranged in the expansion sections (2);

the construction method also comprises the following steps:

step S1, traversing the shield machine (1) to a traversing end position based on the construction method of traversing in the shield station as claimed in any one of claims 1 to 3;

step S2: jacking the shield tunneling machine (1): after the shield machine (1) transversely moves to a transverse movement end position in the expansion section (2) of a receiving end, arranging a second jack (6) on the ground of the receiving end, lifting the shield machine (1) upwards to a designated height through the second jack (6), laying a track (7) on a longitudinal movement path of the bracket (3), and enabling the shield machine (1) to be in sliding fit with the track (7), wherein the track (7) comprises a first track (71), a second track (72) and a third track (73), the first track (71) is laid in the expansion section (2) of the receiving end, the third track (73) is laid in the initial expansion section (2), and the second track (72) is connected between the first originating track (71) and the third track (73);

and step S3: the shield machine (1) moves longitudinally: a counter-force support (8) and a third jack (9) are installed on the rail (7), the bracket (3) is pushed to move longitudinally through the counter-force support (8) and the third jack (9), and the bracket (3) moves from a receiving end to a specified position of an initiating end through the rail (7);

and step S4: the shield tunneling machine (1) falls: arranging a fourth jack (10) on the ground of the expanding section (2) at the initiating end, separating the shield machine (1) from the third track (73) through the fourth jack (10), dismantling the third track (73), dropping the shield machine (1) through the fourth jack (10), and dropping the bracket (3) on the transverse track plate (4);

step S5: the shield machine (1) moves transversely in the reverse direction: and arranging a fifth jack (11) on the side wall of the expanding section (2) at the originating end, pushing the bracket (3) to move transversely in a reverse direction relative to the transverse moving track plate (4) through the fifth jack (11), and enabling the bracket (3) to move transversely to the shield originating position through the transverse moving track plate (4) to complete shield station crossing.

5. The construction method for passing through the station in the shield station according to claim 4, wherein the step S2 further comprises: the shield machine is characterized in that a jacking stress plate (17) is welded on a shell of the shield machine (1), the jacking stress plate (17) corresponds to a rib plate in the shield machine (1), and the jacking stress plate (17) is matched with the second jack (6).

6. The construction method for passing through the station in the shield station according to claim 4, characterized in that the track (7) is a channel-shaped member, the bottom of the bracket (3) is provided with a rubber plate (20), and the rubber plate (20) is placed inside the notch of the track (7).

7. The construction method for passing through the shield station according to claim 6, wherein a stainless steel plate (8) is fixed inside a notch of the track (7), and a tetrafluoro plate (11) is connected to the bottom of the rubber plate (10).

8. A construction method for passing through a station in a shield station according to claim 6, characterized in that the counter force support (8) comprises a first counter force support (81), and a plurality of the first counter force supports (1) are arranged at intervals inside the notch of the track (7).

9. A construction method for passing through a station in a shield station according to claim 6, characterized in that the counter-force support (8) further comprises a second counter-force support (82), and the second counter-force support (82) is detachably mounted on the side wall of the track (7).

10. The construction method for station crossing in the shield station according to claim 4, characterized in that after the station crossing of the shield machine (1) is completed, a reaction frame (29) is installed, and after the reaction frame (29) is installed, a rear matching trolley (27) is connected.

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