CN110159279B

CN110159279B - Shield constructs quick-witted advancing device

Info

Publication number: CN110159279B
Application number: CN201910497685.8A
Authority: CN
Inventors: 檀俊坤
Original assignee: Shanghai Mine Technology Co ltd
Current assignee: Shanghai Mine Technology Co ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2021-02-19
Anticipated expiration: 2039-06-10
Also published as: CN110159279A

Abstract

The invention aims to overcome at least one defect in the prior art and provides a shield tunneling machine propelling device so as to reduce the manufacturing cost of a support and improve the construction efficiency. The shield tunneling machine is arranged on the support group, wherein the shield tunneling machine is arranged at the head end, and the tail end of the support group is provided with a counter-force component. The invention realizes the recycling of the support by the detachable support connected end to end. The shield constructs the machine and arranges the support in, and the shield constructs the machine and realizes advancing through the reaction member, and relative support removes to the head end direction, and when the shield constructs the machine and removes the distance of at least one support, the support that is located the tail end can be dismantled and move to the head end, realizes the cyclic utilization of support. The operation method of the propelling device is simple, and the method for disassembling and installing the support is simple, so that the dynamic cyclic utilization of the support in the propelling process of the shield tunneling machine can be realized, and the high-efficiency construction can be realized.

Description

Shield constructs quick-witted advancing device

Technical Field

The invention relates to the technical field of tunnel engineering, in particular to a shield tunneling machine propelling device.

Background

In recent years, with the rapid development of cities, the urban subway construction is rapidly developed, the urban rail transit construction is more hot, the main mode adopted by the urban subway construction at present during shield tunneling construction is adopted, but when some complex geology is met, other construction methods are required to construct a tunnel, and when a shield machine is constructed to the tunnel which is already excavated, the shield machine needs to be pushed to pass through the tunnel section which is already excavated. In order to ensure that the shield machine can smoothly push through the excavated tunnel section, a concrete guide table in the excavated tunnel is used as a shield body support, steel rails laid on the guide table are used as shield body walking rails, two hydraulic jacks are used as shield body propelling power, counter-force holes are formed in guide rails, and a counter-force frame matched with the counter-force holes is matched to push the shield body to move forwards on the rails.

Chinese patent CN106150511B discloses a shield tunneling type air-driven underground excavation tunnel construction method through ground cracks, which comprises the following steps: firstly, constructing a concrete guide platform in a ground fissure subsurface tunnel; secondly, constructing a guide rail and a reaction frame; thirdly, pushing the whole shield tunneling machine forwards: pushing the shield tunneling machine forwards, supporting the shield tunneling machine on two guide rails, and pushing the whole body forwards by using a thrust cylinder and a reaction frame of the shield tunneling machine until the pushing is in place; in the pushing process, a plurality of shield segments are installed on the concrete guide table forwards from back by the shield segment erector of the shield tunneling machine, the shield segments are bottom segments and are located on the rear side of the thrust cylinder, the thrust cylinder is supported on the reaction frame through the bottom segments, and a plurality of bottom segments form a trolley translation channel for enabling a rear supporting trolley of the shield tunneling machine to translate forwards. The method utilizes the inverted arch backfill structure in the tunnel to simply and conveniently complete the construction process of the shield tunneling through the underground fissure during the air-propelling of the shield, and the construction process is safe. In tunnel construction, however, the shield machine advancing track is usually laid before the shield machine enters the tunnel face to advance the shield machine to the tunnel excavation interface. Application No. 2018111103796 discloses an air-pushing stepping device, which comprises a guide rail arranged on a concrete guide table with a thickness of approximately one meter, a reaction hole reserved on the guide table, a reaction member inserted into the reaction hole, and a shield horizontal pushing cylinder acting on the reaction member to advance along the guide rail; above-mentioned two kinds of devices all need lay the concrete in advance and fall the platform, cost a large amount of labours and concrete volume, and the concrete needs lengthy maintenance cycle to reach standard strength just can impel and influence the engineering progress, and economic cost is big, and is efficient.

The publication No. CN102337900A discloses a circulating cushion type shield machine air-pushing method, the device sets a bracket at the bottom of the shield machine, two rows of vertical jacks are arranged at two sides of the shield machine, a horizontal jack transmits force with the bracket through a counterforce component, the horizontal jack transmits force to push the shield machine to move forwards on the bracket, then the vertical jacks are started to discard the shield machine, the horizontal jack contracts to push the bracket to move forwards, the contracting vertical jack shield machine falls on the bracket to repeat the forward pushing, the device is in contact with the ground, the bracket moves forwards and slides and rubs with the ground to easily damage the bracket, the shield machine generally reaches up to a ton, the vertical jacks need great power, the efficiency in the actual engineering is low, the recycling rate is low, and the manufacturing cost is high.

Disclosure of Invention

The invention aims to overcome at least one defect of the prior art and provides a shield machine propelling device so as to achieve the purposes of reducing the construction cost of a shield air propelling step section, promoting the construction to be efficiently and quickly propelled and realizing the cyclic utilization of a support.

The technical scheme adopted by the invention is that the shield machine propelling device comprises at least two supports which are detachably connected end to form a support group, the shield machine is arranged on the support group, the shield machine propelling direction is the head end, and the tail end of the support group is provided with a counter-force member.

The invention realizes the recycling of the support by the detachable support connected end to end. The shield constructs the machine and arranges the support in, and the shield constructs the machine and realizes advancing through the reaction member, and relative support removes to the head end direction, and when the shield constructs the machine and removes the distance of at least one support, the support that is located the tail end can be dismantled and move to the head end, realizes the cyclic utilization of support.

The detachable connection mode of the supports is various, the side surfaces of the supports can be fixed through threaded fastening connectors, the supports can also be in a mutually nested connection mode, and the shield tunneling machine can move on the upper side of the support group without being influenced.

The reaction member is mainly used as an acting force fulcrum for pushing the shield tunneling machine on the support, the reaction member can be fixed at the tail end of the support at the tail end through a threaded fixing piece, the reaction member can be embedded into the tail end of the support at the tail end in a nesting mode to push the shield tunneling machine to advance, one end of the power device props against the reaction member, the other end of the power device is installed on the shield tunneling machine, and the shield tunneling machine is pushed forwards.

Furthermore, the supports are provided with connecting parts, and the adjacent two supports are detachably connected through the connecting parts.

Further, the supports are connected with each other in a nested manner through connecting parts.

Furthermore, one end of the support is provided with a tenon, and the other end of the support is provided with a mortise matched with the tenon, so that the end-to-end connection of the support is realized.

The tenon and the mortise are simply engaged, so that the two supports are conveniently combined together, and the connection parts of the two supports can be nested with each other by the cooperation of the tenon and the mortise, so that the two supports are connected more tightly. Specifically, every support one end is equipped with the tenon, and the other end is equipped with the mortise that matches with the tenon, inserts the mortise of another support with the tenon of a support, analogizes in proper order, closely connects side by side between the support, forms the support group.

Preferably, one end of each support is provided with two tenons, and the other end of each support is provided with two mortises respectively matched with the two tenons. More preferably, the tenon is located same horizontal plane, is located the both sides position department of support, and is same, the mortise is also same horizontal plane, can realize the matching of tenon.

The invention is convenient for quick installation and disassembly of the supports through the design of the tenon and the mortise. Because the weight of the shield machine is large, the supports are mutually linked together by the mortise and tenon structure, when the shield machine is propelled, the longitudinal tensile force of the counterforce component borne by the tail end support is transmitted to the supports in the front row through the mortise and tenon part, the sum of the maximum static friction force of each support is greater than the maximum static friction force of the shield machine and the supports, the shield machine is promoted to move in the propelling process, and the supports are static relative to the ground. Because the weight of the shield machine is larger, the shield machine can be more smoothly propelled, and the propelling efficiency is improved.

Furthermore, a groove for preventing the shield tunneling machine from rolling laterally is arranged in the middle of the support.

According to the shield machine, the groove is formed in the middle of the support, the two sides of the groove are protruded, so that the shield machine can be longitudinally arranged in the groove, the protruded parts on the two sides of the support form the baffle, the shield machine can be effectively prevented from rolling laterally, and the propelling process is stable. The shield machines in other shapes are the same, and the shape of the groove can be set according to the shape of the shield machine, so that better fitting is realized.

Furthermore, the tenon is equipped with first jack, the other end of support is equipped with the second jack for behind the tenon grafting mortise, the punchhole level of first jack and second jack is concentric, still includes the rivet, utilizes the rivet passes first jack and second jack and fixes.

Because there is huge driving force in the promotion process of shield structure machine, and only through the nested connection of tenon and mortise between the support, can make separation between two continuous supports in the promotion process, influence the propulsion process, consequently, in order to realize the further fixed between two supports, be equipped with first jack on the tenon of support, be equipped with the second jack that can be concentric with first jack level on the lateral wall of the mortise of the other end of support for the tenon of support one end inserts in the mortise rather than adjacent support, after the position is aimed at, the punchhole of first jack and second jack forms the jack of concentric level, recycles the rivet and fixes the two.

Furthermore, the reaction member comprises a reaction seat, and one end of the support is provided with an accommodating space matched with the reaction seat.

In order to further guarantee advancing device's wholeness, avoid too many influences the stability of whole work of scattered part, the one end fixed connection of reaction member and support, also can the integrated design, the other end of support is equipped with the accommodation space who matches with the reaction seat for when two supports are connected, the reaction seat of a support can insert to the accommodation space of another support, realizes the zonulae occludens of two supports.

Further, the counter-force component further comprises a counter-force seat, one end of the counter-force seat is fixedly connected with the support, a clamping groove is formed in the middle of the counter-force seat, a clamping plate is arranged on the clamping groove, a horizontal pushing cylinder is arranged at one end of the shield tunneling machine, and one end of the horizontal pushing cylinder abuts against the clamping plate to enable the shield tunneling machine to be pushed forwards. The length of the support along the shield advancing direction is less than or equal to the maximum length of the horizontal pushing cylinder of the shield machine.

The reaction seat can be made of steel plates with other shapes except for the steel plate, and correspondingly, the shape of the accommodating space is matched with that of the reaction seat, so that the reaction seat can be arranged in the accommodating space. The middle part of counter-force seat is equipped with horizontal draw-in groove, arranges the cardboard in on the draw-in groove, and the level on the shield constructs the machine pushes away jar one end and withstands the cardboard, and the cardboard also can be the rectangle, pushes away under the promotion of jar at the level, and the shield constructs the machine and realizes promoting forward.

The shield machine is pushed forward under the action of the horizontal pushing cylinder, so that the maximum extending length of the horizontal pushing cylinder is required to be ensured to be more than or equal to the longitudinal length of a single support, and when the horizontal pushing cylinder pushes the maximum distance, the shield machine can be pushed to the next support.

Analogize according to the mode above, promote at every turn and can both make the shield structure machine remove the distance of at least one support, when needs support cyclic utilization, can separate the support of this tail end and adjacent support, arrange the cardboard in the counter-force seat of adjacent support on, this cardboard is withstood to horizontal push cylinder one end, connects the support of isolating in head end support department again, realizes quick assembly disassembly and cyclic utilization of support.

The invention also provides a propelling method of the propelling device of the shield tunneling machine, which comprises the following steps: s1: connecting at least two supports, namely a first support and a second support end to form a support group; placing the shield machine on the support group, and keeping the advancing direction of the shield machine parallel to the support; the outer end of a horizontal pushing cylinder of the shield tunneling machine is propped against a clamping plate at the tail end of a first support; s2: starting a horizontal pushing cylinder of the shield tunneling machine, and pushing the shield tunneling machine to slide along the direction of the head end; s3: when the shield machine is completely separated from at least the first support, stopping the extension of the horizontal pushing cylinder of the shield machine, separating the horizontal pushing cylinder of the shield machine from a clamping plate of the counter-force member, and separating the first support from the second support; s4: the horizontal pushing cylinder is contracted, the separated clamping plate is clamped on the clamping groove of the second support counter-force seat, and the horizontal pushing cylinder is contracted to prop against the clamping plate; s5: moving the separated first support to the head end of the support group for installation and fixation; s6: and circularly repeating the steps S2, S3, S4 and S5 to push the shield machine to the designated position.

The forward direction of the shield tunneling machine is defined as the head end, and the linear reverse direction is defined as the tail end. The shield tunneling machine propelling device comprises supports, a plurality of middle supports, a counterforce seat and a mortise, wherein the supports are connected end to end and at least comprise a first support at the tail end and a second support at the head end, when the supports are more, the middle supports are further included, the tail end of the first support is provided with the counterforce seat and the mortise, the head end of the support is provided with a tenon matched with the mortise and an accommodating space for accommodating the counterforce seat, a rivet is used for fixing a first jack of the tenon and a second jack at the side wall of the mortise to fix the support group, a groove is formed in the counterforce seat, a clamping plate is arranged on the groove, and a horizontal pushing cylinder of the shield tunneling machine is used for pushing the clamping plate.

After the support group is installed and fixed, starting a horizontal pushing cylinder of the shield tunneling machine, and pushing the shield tunneling machine to slide along the direction of the head end; when the shield tunneling machine is completely separated from the first support at the tail end, stopping the extension of the horizontal pushing cylinder of the shield tunneling machine, separating the horizontal pushing cylinder of the shield tunneling machine from the clamping plate, separating the first support from the second support, contracting the horizontal pushing cylinder, clamping the separated clamping plate on the clamping groove of the counter-force seat of the second support, and contracting the horizontal pushing cylinder to push the clamping plate; and then the separated first support is moved to the head end of the support group for installation and fixation so as to realize one-time pushing. The recycling of the support is realized through the step of repeated propelling. The operation method of the invention is simple, and the dynamic cyclic utilization of the support in the propelling process of the shield machine can be realized because the dismounting and mounting methods of the support are simple.

Further, in step S1, a step of applying lubricating oil on the upper side of the seat is further included.

The friction force between the shield machine and the upper side of the support can be reduced by smearing lubricating oil, the propelling efficiency of the shield machine is improved, the abrasion of the contact surface between the shield machine and the support can be reduced, and the service life of the whole set of equipment is prolonged.

Further, when the pushing is stopped in step S3, the front end of the shield machine is located behind the head end of the support set, so as to ensure that the shield machine keeps pushing when the support from which the shield machine is detached moves to the head end of the support set.

Further, in step S5, the mounting and fixing method includes aligning the mortise and the reaction seat of the separated tail end support with the tenon and the accommodating space of the head end support, respectively, and fixing the separated tail end support with a rivet through the first insertion hole and the second insertion hole.

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

(1) the propelling device can realize the recycling of the support in the propelling process of the shield tunneling machine through the design of the supports which are detachably connected end to end, realize the dynamic recycling, reduce the support cost of the support, and save the material cost on the engineering on the whole because the support is quickly dismantled in a detachable connection mode without influencing the propelling process of the shield tunneling machine.

(2) In the propelling process, the maximum static friction force between the support and the ground is far greater than the maximum static friction force between the shield and the support, so that the support and the ground cannot move relatively, the abrasion of the support can be reduced, the service life is prolonged, and the stability of the whole operation is improved. The propelling device is simple in structure, adopts the hydraulic propeller of the shield, does not need an additional propelling system for propelling, is low in manufacturing cost, is simple in structure, is easy to obtain manufacturing materials, is low in production cost, and is suitable for industrial popularization and application.

(3) The propelling device is convenient to disassemble and assemble, can improve the construction efficiency, is convenient to transport and carry and reutilize, and saves the labor cost.

(4) According to the invention, through the design of the nested support, on one hand, the installation space can be saved, and on the other hand, the nested design enables the supports to be tightly connected with each other.

(5) The rapid disassembly and assembly of the supports can be realized by matching the jacks with the rivets, the jacks are respectively arranged on the side walls of the tenon and the mortise, and the further fixation can be realized only by the rivets, so that the additional components are few, the manufacturing cost is reduced, the connection between the two supports is ensured, and the stability of the whole propelling device is further improved.

(6) According to the invention, the accommodating space is arranged, the counter-force seat is arranged on each support, and when the supports are connected with each other, the counter-force seat can be arranged in the accommodating space at one end of the adjacent support, so that an additional fixing component is not required, and the supports are convenient to detach and mount.

(7) The operation method of the propelling device is simple, and the dynamic cyclic utilization of the support in the propelling process of the shield machine can be realized due to the simple dismounting and mounting method of the support. And lubricating oil is coated on the support, so that the friction force between the shield machine and the upper side of the support can be reduced, the propelling efficiency of the shield machine is improved, the abrasion of the contact surface between the shield machine and the support can be reduced, and the service life of the whole set of equipment is prolonged.

Drawings

Fig. 1 is a schematic perspective view of the stand according to the present invention.

Fig. 2 is a schematic view of the overall structure of the propulsion device of the present invention.

Fig. 3 is a schematic structural diagram of the support set of the present invention.

Detailed Description

The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, a propulsion device of a shield tunneling machine 10 comprises at least two supports 1 which are detachably connected end to end, and as shown in fig. 2, the shield tunneling machine 10 is arranged on a support group, wherein the direction of the shield tunneling machine is the head end, and the tail end of the support group is provided with a counterforce component 2.

The support 1 is equipped with connecting portion, realizes dismantling the connection through connecting portion between two adjacent supports 1.

The supports 1 are connected with each other in a nested manner through connecting parts.

One end of the support 1 is provided with a tenon 11, and the other end of the support is provided with a mortise 12 matched with the tenon 11, so that the end-to-end connection of the support 1 is realized. And a groove 13 for preventing the shield tunneling machine 10 from rolling laterally is arranged in the middle of the support 1.

The tenon 11 is provided with a first jack 14, the other end of the support 1 is provided with a second jack 15, so that after the tenon 11 is inserted into the mortise 12, the holes of the first jack 14 and the second jack 15 are horizontally concentric, and the rivet (not shown in the figure) is further included and passes through the first jack 14 and the second jack 15 to be fixed.

As shown in fig. 3, the reaction member 2 includes a reaction seat 22, and one end of the support 1 is provided with an accommodating space 16 for matching with the reaction seat 22.

As shown in fig. 2, the reaction member 2 includes a reaction seat 22, one end of the reaction seat 22 is fixedly connected to the support 1, a clamping groove 21 is formed in the middle of the reaction seat, a clamping plate 20 is disposed on the clamping groove 21, a horizontal pushing cylinder 30 is disposed at one end of the shield tunneling machine 10, one end of the horizontal pushing cylinder 30 abuts against the clamping plate 20 to enable the shield tunneling machine 10 to be pushed forward, and the length of the support 1 in the shield tunneling direction is less than or equal to the maximum length of the horizontal pushing cylinder 30 of the shield tunneling machine 10 extending out.

Example 2

Referring to fig. 1 to 3, a method for propelling a shield tunneling machine propelling device includes the following steps: s1: connecting at least two supports, namely a first support and a second support end to form a support group; placing the shield machine on the support group, and keeping the advancing direction of the shield machine parallel to the support; the outer end of a horizontal pushing cylinder of the shield tunneling machine is propped against a clamping plate at the tail end of a first support; s2: starting a horizontal pushing cylinder of the shield tunneling machine, and pushing the shield tunneling machine to slide along the direction of the head end; s3: when the shield machine is completely separated from at least the first support, stopping the extension of the horizontal pushing cylinder of the shield machine, separating the horizontal pushing cylinder of the shield machine from a clamping plate of the counter-force member, and separating the first support from the second support; s4: the horizontal pushing cylinder is contracted, the separated clamping plate is clamped on the clamping groove of the second support counter-force seat, and the horizontal pushing cylinder is contracted to prop against the clamping plate; s5: moving the separated first support to the head end of the support group for installation and fixation; s6: and circularly repeating the steps S2, S3, S4 and S5 to push the shield machine to the designated position. In step S1, the method further includes a step of applying lubricating oil to the upper side of the mount 1.

When the step S3 stops propelling, the front end of the shield machine is located behind the head end of the support set, so as to ensure that the shield machine keeps propelling when the support from which the shield machine is detached moves to the head end of the support set.

In step S5, the mounting and fixing method is to align the mortise 12 and the reaction seat of the separated tail end support 1 with the tenon and the accommodating space of the head end support, respectively, and fix the separated tail end support through the first insertion hole 14 and the second insertion hole 15 by using a rivet (not shown in the figure).

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.

Claims

1. The shield machine propelling device is characterized by comprising at least two supports (1) which are detachably connected end to form a support group, wherein the shield machine (10) is arranged on the support group, the shield machine propelling direction is the head end, and the tail end of each support is provided with a counter-force member (2);

the reaction member (2) comprises a reaction seat (22), and one end of the support (1) is provided with an accommodating space (16) matched with the reaction seat (22);

the reaction member (2) further comprises a clamping plate (20), one end of the reaction seat (22) is fixedly connected with the support (1), a clamping groove (21) is formed in the middle of the reaction seat, the clamping plate (20) is arranged on the clamping groove (21), a horizontal pushing cylinder (30) is arranged at one end of the shield tunneling machine (10), and one end of the horizontal pushing cylinder (30) abuts against the clamping plate (20) to enable the shield tunneling machine (10) to be pushed forwards;

the two adjacent supports (1) are detachably connected through the connecting part; the support design that can dismantle the end to end realizes that the shield constructs quick-witted support dynamic cyclic utilization in advancing the process.

2. A propulsion device according to claim 1, characterised in that the carriers (1) are connected to each other in a nested manner by means of a connection.

3. The propulsion device according to claim 1, characterized in that one end of the support (1) is provided with a tenon (11), and the other end is provided with a mortise (12) matched with the tenon (11), so that the support (1) is connected end to end.

4. A propulsion device according to claim 1, characterised in that the support (1) is provided with a recess (13) in the middle to avoid lateral rolling of the shield machine (10).

5. A propulsion device according to claim 3, characterised in that the tenon (11) is provided with a first socket (14) and the other end of the support (1) is provided with a second socket (15) so that after the tenon (11) is inserted into the mortise (12), the holes of the first socket (14) and the second socket (15) are horizontally concentric, and that the device further comprises a rivet, and the rivet is used for fixing through the first socket (14) and the second socket (15).

6. The propulsion device according to claim 1, characterized in that the length of the support (1) in the direction of shield propulsion is less than or equal to the maximum length of extension of the horizontal thrust cylinder (30) of the shield machine (10).

7. A propulsion device according to any one of claims 1 to 6, characterised in that the set of carriages is coated on the upper side with a lubricating oil.