CN108729922B - Push bench and retractable push bench construction method - Google Patents
Push bench and retractable push bench construction method Download PDFInfo
- Publication number
- CN108729922B CN108729922B CN201810550661.XA CN201810550661A CN108729922B CN 108729922 B CN108729922 B CN 108729922B CN 201810550661 A CN201810550661 A CN 201810550661A CN 108729922 B CN108729922 B CN 108729922B
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- push bench
- inner shell
- eccentric
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 230000000712 assembly Effects 0.000 claims description 59
- 238000000429 assembly Methods 0.000 claims description 59
- 238000005192 partition Methods 0.000 claims description 20
- 230000005641 tunneling Effects 0.000 claims description 8
- 238000009412 basement excavation Methods 0.000 claims description 4
- 230000036544 posture Effects 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 4
- 238000000034 method Methods 0.000 description 19
- 239000002184 metal Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/126—Loading devices or installations
Abstract
The application discloses a push bench, comprising a shell with a central cavity; an inner shell with a cavity in the center and detachably installed in the central cavity; the cutter head is arranged at the front end of the inner shell, and the cross section of the cutter head can be matched with the cross section of the inner shell. By using the push bench, the inner shell and the outer shell can be disconnected, so that the inner shell and the cutter head can be dragged into the starting well from the direction opposite to the excavating direction of the push bench in the excavated tunnel, the push construction is completed, and the push construction can be smoothly completed without arranging a receiving well. Therefore, the pipe jacking machine provided by the application can smoothly finish pipe jacking construction on the premise of not arranging a receiving well. The application also discloses a retractable pipe jacking construction method.
Description
Technical Field
The invention relates to the technical field of engineering equipment, in particular to a push bench. The invention also relates to a retractable pipe jacking construction method.
Background
With the development of economy, the pace of the urbanization process is gradually increased. In a limited urban space, due to a large amount of people and traffic, the demand of urban underground tunnels such as underground pedestrian passages, subway tunnels and the like is increased. In view of the advantages of small influence on the surrounding of construction, capability of crossing obstacles and the like, the push bench is widely applied to the construction of various underground tunnels in cities.
When the existing pipe pushing bench is utilized to excavate the urban underground tunnel, an originating well and a receiving well are usually preset at two ends of the tunnel to be excavated, so that the pipe pushing bench can conveniently originate and receive.
However, in the initial construction, the receiving well cannot be arranged to receive the push bench due to the topography limitation in the aspects of houses, streets, traffic and the like, or the push bench cannot be received by using the receiving well due to unpredictable barriers such as larger tree roots, larger rocks, faults of the push bench and the like in the construction process, so that the push bench cannot enter a construction tunnel or cannot be pulled out in the construction tunnel, and obviously, a series of serious problems caused by the fact that the conventional push bench and push bench construction method possibly cannot receive the push bench by using the receiving well are not reasonably solved at present.
Therefore, how to smoothly and safely complete the pipe jacking construction without using the receiving well is a technical problem to be solved by the current technicians in the field.
Disclosure of Invention
In view of the above, the present invention aims to provide a push bench and a retractable push bench construction method, which can solve the problem that push bench construction is successfully completed without a receiving well.
The specific scheme is as follows:
the utility model provides a push bench, include:
a housing having a central cavity;
an inner shell with a cavity in the center and detachably installed in the central cavity;
the cutter head is arranged at the front end of the inner shell, and the cross section of the cutter head can be matched with the cross section of the inner shell.
Preferably, the cutterhead includes:
the baffle plate is arranged at the front end of the cavity;
a cutter assembly passing through the partition for tunneling a tunnel;
and the driving assembly is connected with the cutter assembly and used for driving the cutter assembly to feed into the tunnel.
Preferably, the cutter assembly comprises a plurality of groups of sub-cutter assemblies, and any two adjacent sub-cutter assemblies are arranged in a staggered mode front and back along the central axis of the cavity.
Preferably, the sub-cutter assembly comprises:
a plurality of butterfly type eccentric sub-cutter components which are respectively arranged on the partition plate and distributed in a ring shape;
and a plurality of groups of butterfly symmetrical sub-cutter assemblies are respectively arranged between two adjacent butterfly eccentric sub-cutter assemblies.
Preferably, the central cavity is a rectangular central cavity, the butterfly eccentric sub-cutter assembly comprises four groups of butterfly eccentric sub-cutter assemblies respectively distributed on four vertex angles of the rectangular central cavity, and the butterfly symmetrical sub-cutter assembly comprises two groups of butterfly symmetrical sub-cutter assemblies respectively distributed along the longitudinal central axis of the rectangular central cavity in a staggered manner.
Preferably, the butterfly eccentric sub-cutter assembly comprises:
an eccentric rotation shaft passing through the partition plate;
two short sub-cutter assemblies which are adjacently arranged on the eccentric rotating shaft and form a certain included angle;
and two long sub-cutter assemblies connected with one ends of the two short sub-cutter assemblies, which are close to the eccentric rotating shaft, respectively.
Preferably, the method further comprises:
and the deviation correcting devices are arranged in the central cavity and distributed along the central axis of the central cavity, and are used for adjusting tunneling postures.
Preferably, the method further comprises:
and the conveying device is arranged at the rear side of the cutterhead and used for conveying slag.
The application also provides a retractable pipe jacking construction method, which comprises the following steps:
setting an originating well, assembling, debugging and operating the push bench;
excavating the push bench to a preset position, and disconnecting the inner shell and the outer shell of the push bench;
connecting the tensioning part with the inner shell, and dragging the inner shell and the cutter head along the direction opposite to the digging direction of the push bench through the tensioning part;
and (5) removing the shell.
Preferably, the assembling, debugging and operating the push bench comprises:
assembling an outer shell, an inner shell and a cutter head of the push bench, and debugging the push bench;
the pipe jacking machine performs tunnel excavation along a preset construction line;
the push bench is operated to a preset position, and the cutter head is rotated into a central cavity of the shell;
grouting to strengthen the face and around the excavated tunnel.
Compared with the background art, the push bench provided by the application comprises a shell with a central cavity; an inner shell with a cavity in the center and detachably installed in the central cavity; the cutter head is arranged at the front end of the inner shell, and the cross section of the cutter head can be matched with the cross section of the inner shell.
When the pipe jacking machine provided by the application excavates to the preset position of the tunnel along the preset excavation line, the inner shell installed in the central cavity is disconnected with the outer shell on the premise of having enough strength around the excavated tunnel, the cutter head installed in the inner shell is rotated to the set position, the cross section of the cutter head is enabled to be identical with that of the inner shell, then the inner shell and the cutter head installed on the inner shell are dragged, the inner shell, the cutter head and the outer shell are sequentially dragged to the originating well from the direction opposite to the excavation direction of the pipe jacking machine in the excavated tunnel and then received to the ground, so that pipe jacking construction is completed, the inner shell and the cutter head are independently dragged out from the originating well of the excavated tunnel in the whole pipe jacking construction process, and the construction can be smoothly completed without setting a receiving well. Therefore, the pipe jacking machine provided by the application can smoothly finish pipe jacking construction on the premise of not arranging a receiving well.
The retractable pipe jacking construction method applied to the pipe jacking machine has the same beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a push bench according to an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1;
fig. 3 is a partial structural axial view of the outer and inner shells of fig. 1.
The reference numerals are as follows:
the device comprises an outer shell 1, an inner shell 2, a cutter head 3, a deviation correcting device 4 and a conveying device 5;
a diaphragm 31, a cutter assembly 32 and a drive assembly 33;
a butterfly eccentric sub-cutter assembly 321 and a butterfly symmetric sub-cutter assembly 322;
eccentric shaft 3211, short sub-cutter assembly 3212, and long sub-cutter assembly 3213.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that those skilled in the art will better understand the present invention, the following description will be given in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 3, fig. 1 is a schematic front view of a push bench according to an embodiment of the present invention; FIG. 2 is a side view of FIG. 1; fig. 3 is a partial structural axial view of the outer and inner shells of fig. 1.
The embodiment of the invention discloses a pipe jacking machine which comprises an outer shell 1, an inner shell 2, a cutter head 3, a deviation correcting device 4 and a conveying device 5.
The shell 1 is provided with a central cavity, the periphery of the shell is generally attached to an external rock mass, and the shell plays roles in supporting and protecting other parts in the pipe jacking construction process. In this embodiment, the cross section of the housing 1 is specifically a rectangular ring structure, and the corresponding push bench is generally called a rectangular push bench, however, the cross section of the housing 1 may also be a ring structure or other ring structures, which does not affect the achievement of the object of the present invention. Generally, the casing 1 is divided into three parts, namely a front shield, a middle shield and a tail shield, and the three parts can be fixedly connected together in a mode of bolting, welding, riveting and the like, wherein each part adopts a split structure, specifically, each part is connected together by eight metal plates through bolts, so that each partition of the casing 1 is hoisted into an originating well. Of course, the number of blocks of the front shield, the middle shield, and the tail shield is specifically determined depending on factors such as the tunnel size, and is not limited to eight, and it is apparent that the structure of the enclosure 1 is not limited thereto.
The inner shell 2 is installed in the central cavity of the outer shell 1, and a cavity is arranged in the center of the central cavity so as to provide space for the installation of other components. In this embodiment, the width of the inner shell 2 is smaller than the width of the central cavity of the outer shell 1, and the inner shell 2 may be split, specifically formed by connecting an upper part and a lower part through bolts. Of course, the inner housing 2 may be of unitary or other split construction without affecting the achievement of the objectives of the present invention.
The cutterhead 3 is mounted at the front end of the cavity of the inner shell 2, and the cross section of the cutterhead 3 can be matched with the cross section of the cavity of the inner shell 2, so that the contour of the cutterhead 3 is completely located in the central cavity of the outer shell 1. In this particular embodiment, the cutterhead 3 includes a partition 31, a cutter assembly 32 and a drive assembly 33.
Wherein the partition plate 31 is arranged at the front end of the cavity of the inner shell 2, and is mainly used for supporting the cutter assembly 32 and the driving assembly 33 and also used for separating the mining face of the tunnel from the internal equipment. Specifically, the partition plate 31 includes an upper metal plate and a lower metal plate, the contact ends of the two metal plates are respectively provided with a bending part bending backward, the two bending parts are fixedly connected into a whole through bolts and nuts, and the two metal plates are respectively connected into a whole with the cavity of the inner shell 2 through bolts so as to connect the upper part and the lower part of the inner shell 2 into a whole. Of course, the structure, fixing method, and connection method of the separator 31 are not limited thereto. Grouting holes are further formed in the partition plate 31 to allow curing grout to be injected after pipe jacking construction is completed, so that the face is stabilized. The face generally refers to a working face which is pushed forward in the process of excavating a tunnel.
The cutter assembly 32 passes through the bulkhead 31 and is primarily used to excavate a tunnel.
The cutter assembly 32 comprises a plurality of sets of sub-cutter assemblies, any two adjacent sub-cutter assemblies being staggered back and forth along the central axis of the cavity of the inner housing 2.
In this particular embodiment, the sub-cutter assemblies include a butterfly eccentric sub-cutter assembly 321 and a butterfly symmetrical sub-cutter assembly 322.
Wherein, butterfly eccentric sub-cutter assembly 321 includes several groups, and several groups of butterfly eccentric sub-cutter assemblies 321 are all mounted on partition plate 31. Furthermore, the plurality of groups of butterfly eccentric sub-cutter assemblies 321 are annularly distributed, in this particular embodiment, in the form of a rectangular annular distribution, or may be annularly distributed, or of other types, without affecting the achievement of the objects of the present invention. In this particular embodiment, the central cavity of the casing 1 is a rectangular central cavity, naturally, the distribution shape of the cutter assemblies 32 is also a rectangular annular structure, and the butterfly eccentric sub-cutter assemblies 321 specifically comprise an upper layer and a lower layer, and the four layers of butterfly eccentric sub-cutter assemblies respectively distributed on four vertex angles of the rectangular central cavity, wherein the two butterfly eccentric sub-cutter assemblies 321 positioned on the upper layer are arranged in front, and the butterfly eccentric sub-cutter assemblies 321 positioned on the lower layer are arranged behind. Accordingly, the butterfly symmetrical sub-cutter assembly 322 specifically comprises two groups of butterfly symmetrical sub-cutter assemblies which are respectively distributed in a staggered manner along the longitudinal central axis of the rectangular central cavity, wherein the butterfly symmetrical sub-cutter assembly 322 positioned at the upper layer is arranged at the rear, and the butterfly symmetrical sub-cutter assembly 322 positioned at the lower layer is arranged at the front. Of course, the number and distribution of the butterfly eccentric sub-cutter assemblies 321 is not limited thereto. Any two adjacent sub-cutter assemblies are distributed in a staggered mode along the central axis of the cavity of the inner shell 2, so that the upper soil body, the rock body and the like can be effectively prevented from collapsing.
In this particular embodiment, butterfly eccentric sub-cutter assembly 321 includes an eccentric shaft 3211, a short sub-cutter assembly 3212, and a long sub-cutter assembly 3213. Wherein, eccentric rotation shaft 3211 is installed on partition plate 31 and is mainly used for supporting a cutter. The butterfly eccentric sub-cutter assembly 321 specifically includes two short sub-cutter assemblies 3212 that are adjacently mounted on the eccentric rotating shaft 3211, and a certain included angle is formed between the two short sub-cutter assemblies 3212. In this particular embodiment, short sub-cutter assembly 3212 is typically configured with cutters, blades, and a center cutter connected to eccentric shaft 3211. The butterfly eccentric sub-cutter assembly 321 specifically includes two long sub-cutter assemblies 3213 respectively connected to two short sub-cutter assemblies 3212 near one end of the eccentric rotating shaft 3211, and in this specific embodiment, a plurality of cutters, scrapers, center cutters, etc. are also typically disposed on the long sub-cutter assemblies 3213. When the four eccentric shafts 3211 are rotated to the state shown in fig. 2, the entire cutter assembly 32 is completely located in the central cavity of the outer casing 1 so as to drag the cutter 3 together with the inner casing 2 when the inner casing 2 is disassembled. Notably, the digging area of the butterfly eccentric sub-cutter assembly 321 varies over a range due to its particular configuration. Of course, an angle detecting device may be installed on the butterfly type eccentric sub-cutter assembly 321 to conveniently detect the rotation angle of the eccentric rotary shaft 3211, thereby controlling the rotation state of the eccentric rotary shaft 3211 so as to be able to promote the excavating efficiency while ensuring the retraction to the inner case of the inner case 2. Of course, the structure, number and distribution of the butterfly eccentric sub-cutter assemblies 321 are not limited thereto, and other similar alternatives are employed without affecting the achievement of the objects of the present invention.
The butterfly symmetrical sub-cutter assembly 322 also includes several groups, with the groups of butterfly symmetrical sub-cutter assemblies 322 being disposed between adjacent two butterfly eccentric sub-cutter assemblies 321, respectively. It should be noted that the butterfly symmetrical sub-cutter assembly 322 is located at the front end of the butterfly eccentric sub-cutter assembly 321, i.e., is staggered with respect to the front end of the butterfly eccentric sub-cutter assembly 321 and the butterfly symmetrical sub-cutter assembly 322 with respect to the partition 31. In this embodiment, the butterfly symmetrical sub-cutter assembly 322 comprises two butterfly symmetrical sub-cutter assemblies 322, and the two butterfly symmetrical sub-cutter assemblies 322 are located on the longitudinal central axis of the rectangular annular structure, so that the occurrence of interference of the cutter assemblies is ensured, and the occurrence of local collapse accidents is ensured not to affect production. Of course, the number and mounting locations of the butterfly symmetry sub-cutter assemblies 322 are not limited thereto. The butterfly symmetrical sub-cutter assembly 322 specifically includes two longer sub-cutter assemblies having substantially equal lengths and longer lengths, and cutters such as cutters, scrapers, center cutters, etc. are similarly disposed on the longer sub-cutter assemblies, and of course, the butterfly symmetrical sub-cutter assembly 322 is not limited to this configuration.
The drive assembly 33 is connected to the cutter assembly 32 and is primarily used to drive the cutter assembly 32 to feed the tunnel. In this embodiment, the driving assembly 33 may specifically include a motor, a speed reducer, and other devices, and of course, other types of driving assemblies such as hydraulic, pneumatic, and the like may be used instead. Specifically, each set of cutter assemblies 32 is individually equipped with one set of drive assemblies 33, together with six sets of drive assemblies 33. Generally, the number of drive assemblies 33 and the number of cutter assemblies 32 driven by each set of drive assemblies 33 is determined based on actual calculations. Obviously, the driving manner and the number of the driving units 33 are not limited thereto.
The two ends of the deviation correcting device 4 are arranged in the central cavity of the shell 1, and the length direction of the deviation correcting device 4 is distributed along the central axis of the central cavity of the shell 1 and is mainly used for adjusting the tunneling posture. In this embodiment, the deviation correcting device 4 is specifically installed at the connection position between the middle shield and the tail shield of the housing 1, so as to conveniently adjust the tunneling posture of the push bench. In this embodiment, the deviation correcting device 4 is specifically a deviation correcting cylinder, and two ends of the deviation correcting cylinder are respectively connected with two hinged supports fixed in the central cavity of the housing 1 through pin shafts. In this specific embodiment, two correction cylinders are respectively installed in each of the middle shield and the tail shield, and sixteen correction devices 4 can be installed in natural eight blocks. Of course, the deviation correcting means, fixing means, the number and the like of the deviation correcting device 4 are not limited thereto.
The conveying device 5 is arranged at the rear side of the cutterhead 3 and is mainly used for conveying slag. In this particular embodiment, the conveying means 5 is preferably a screw conveyor. Specifically, the conveying device 5 specifically comprises two spiral conveyors symmetrically arranged along the width direction of the tunnel, so that the excavated slag can be conveyed to the outside in time, and the cutter head 3 can work normally. Of course, the conveyance method and the number of the conveyance devices 5 are not limited thereto.
The present application also includes a tightening portion. The tensioning part is mounted at the tail of the inner shell 2, preferably a wire rope with a proper outer diameter, to facilitate the dragging of the inner shell 2 and the cutterhead 3 from the excavated tunnel in the opposite direction to the originating well. Of course, the kind of the tightening part is not limited thereto.
In summary, the push bench provided by the present application includes an outer housing 1, an inner housing 2 and a cutterhead 3. Cutter head 3 is installed on inner shell 2, and inner shell 2 detachably installs on shell 1, and when inner shell 2 and shell 1 break away from the connection, drag inner shell 2, alright with inner shell 2 and cutter head 3 follow in the central cavity of shell 1 along the opposite direction of tunneling direction and drag in the well of originating, need not to set up the receiving well alone, consequently, the push pipe can solve and accomplish the push pipe construction smoothly under the prerequisite that need not to set up the receiving well.
The application also provides a retractable pipe jacking construction method applying the pipe jacking machine, which comprises the following steps:
step one, setting an originating well, assembling, debugging and operating a pipe jacking machine;
firstly, setting an originating well at a proper position according to a preset construction line. Then, the outer shell 1, the inner shell 2 and the cutter head 3 of the pipe pushing jack are lifted into the starting well in a block and step-by-step mode, and the outer shell 1, the inner shell 2, the cutter head 3 and other accessory components of the pipe pushing jack are assembled in the starting well. And then, debugging all parts of the push bench to ensure the stable and reliable operation of the push bench. Then, the pipe pushing machine is operated to excavate the tunnel, and the pipe joints are assembled to form the tunnel until the pipe pushing machine is operated to a preset position to stop working; when the push bench stops working, the cutterhead 3 rotates to the position shown in fig. 1, and the outer contour of the cutterhead 3 is positioned in the central cavity of the shell 1. Finally, the outer circumferences of the outer shell 1 and the partition plate 31 are injected with solidified slurry through grouting holes, and the slurry can be mortar, double slurry or the like so as to stabilize rock mass or soil mass on the face and the outer circumference of the outer shell 1 and prevent serious safety accidents such as collapse and the like of the excavated tunnel caused in the process of retreating the inner shell 2 and removing the outer shell 1.
Digging the push bench to a preset position, wherein the inner shell 2 of the push bench is disconnected with the outer shell 1;
when the push bench is excavated to a preset position, the connection bolts installed between the outer case 1 and the inner case 2 are removed, thereby disconnecting the outer case 1 and the inner case 2. In view of the fact that the outer diameter of the inner casing 2 is smaller than the inner diameter of the pipe segment of the push bench, it is convenient to drag the inner casing 2 from the outer casing 1 into the originating well in the direction opposite to the digging direction, and accordingly, the cutterhead 3 mounted on the inner casing 2 is dragged out together with the inner casing 3.
Step three, connecting the tensioning part with the inner shell 2, and dragging the inner shell and the cutter head along the opposite direction of the digging direction of the push bench through the tensioning part;
in order to conveniently pull out the inner shell 2 and the cutterhead 3, the inner shell 2 and the tightening part are usually fixedly connected into a whole, the tightening part can be connected with the inner shell 2 in a bolt connection or welding mode, and the inner shell 2 and the cutterhead 3 are conveniently pulled out along the opposite direction of the digging direction of the push bench by pulling the tightening part. Typically, sliding tracks for sliding the inner housing 2 and the cutterhead 3 are laid in the pipe sections so as to reduce friction and quickly retract into the originating well. The tension portion may be a wire rope, and the tension driving force may be from a hoist, but may be other tension driving devices, not limited thereto.
And step four, removing the shell 1.
When the inner shell 2 and the cutterhead 3 are retracted, the pushing oil cylinder is pushed forward to the face, and a safe distance for conveniently dismantling the front shield of the outer shell 1 is reserved; removing the front shield of the shell 1, pushing the oil cylinder to push a certain distance, and leaving a safe distance for removing the shield in the shell 1; and similarly, removing the tail shield and jacking a certain distance again. During this period, whether the pipe sections need to be assembled or not is determined by the actual shield length and the actual pipe section length.
Of course, the operation of this step is specifically according to the actual geological conditions, and under the condition of good geological conditions, the shell 1 can be detached and received separately, so that the recycling is convenient. When the geological conditions are poor, the casing 1 is removed, so that the surrounding cavity is very likely to collapse, and the casing 1 can be left in the excavated tunnel to serve as a pipe joint to further improve the strength of the tunnel from the viewpoint of safety.
Therefore, the method can produce the same beneficial effects, and is not described herein.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The push bench and the retractable push bench construction method provided by the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (6)
1. A push bench, comprising:
a housing having a central cavity;
an inner shell with a cavity in the center and detachably installed in the central cavity;
the cross section of the cutterhead is matched with the cross section of the inner shell;
the cutterhead comprises: the device comprises a partition plate arranged at the front end of the cavity, a cutter component penetrating through the partition plate and used for tunneling a tunnel, and a driving component connected with the cutter component and used for driving the cutter component to feed into the tunnel;
the cutter components comprise a plurality of groups of sub-cutter components, and any two adjacent sub-cutter components are arranged in a staggered mode along the central axis of the cavity;
the sub-cutter assembly comprises: a plurality of butterfly type eccentric sub-cutter assemblies which are respectively arranged on the partition plate and distributed in a ring shape, and a plurality of butterfly type symmetrical sub-cutter assemblies which are respectively arranged between two adjacent butterfly type eccentric sub-cutter assemblies;
the butterfly type eccentric sub-cutter assembly comprises an eccentric rotating shaft penetrating through the partition plate, two short sub-cutter assemblies which are adjacently installed on the eccentric rotating shaft and form a certain included angle, and two long sub-cutter assemblies which are respectively connected with one ends of the two short sub-cutter assemblies, which are close to the eccentric rotating shaft.
2. The push bench of claim 1, wherein the central cavity is a rectangular central cavity, the butterfly eccentric sub-cutter assemblies comprise four groups of butterfly eccentric sub-cutter assemblies respectively distributed on four top corners of the rectangular central cavity, and the butterfly symmetrical sub-cutter assemblies comprise two groups of butterfly symmetrical sub-cutter assemblies respectively distributed in a staggered manner along a longitudinal central axis of the rectangular central cavity.
3. The push bench according to any of claims 1 to 2, further comprising:
and the deviation correcting devices are arranged in the central cavity and distributed along the central axis of the central cavity, and are used for adjusting tunneling postures.
4. The push bench according to any of claims 1 to 2, further comprising:
and the conveying device is arranged at the rear side of the cutterhead and used for conveying slag.
5. A retractable pipe jacking construction method applied to the pipe jacking machine of any one of claims 1 to 4, which is characterized by comprising the following steps:
setting an originating well, assembling, debugging and operating the push bench;
excavating the push bench to a preset position, and disconnecting the inner shell and the outer shell of the push bench;
connecting the tensioning part with the inner shell, and dragging the inner shell and the cutter head along the direction opposite to the digging direction of the push bench through the tensioning part;
removing the shell;
wherein, the center of inner shell is equipped with the die cavity, the blade disc includes: the device comprises a partition plate arranged at the front end of the cavity, a cutter component penetrating through the partition plate and used for tunneling a tunnel, and a driving component connected with the cutter component and used for driving the cutter component to feed into the tunnel;
the cutter components comprise a plurality of groups of sub-cutter components, and any two adjacent sub-cutter components are arranged in a staggered mode along the central axis of the cavity;
the sub-cutter assembly comprises: a plurality of butterfly type eccentric sub-cutter assemblies which are respectively arranged on the partition plate and distributed in a ring shape, and a plurality of butterfly type symmetrical sub-cutter assemblies which are respectively arranged between two adjacent butterfly type eccentric sub-cutter assemblies;
the butterfly type eccentric sub-cutter assembly comprises an eccentric rotating shaft penetrating through the partition plate, two short sub-cutter assemblies which are adjacently installed on the eccentric rotating shaft and form a certain included angle, and two long sub-cutter assemblies which are respectively connected with one ends of the two short sub-cutter assemblies, which are close to the eccentric rotating shaft.
6. The retractable pipe jacking construction method according to claim 5, wherein said assembling, debugging and operating the pipe jacking machine comprises:
assembling an outer shell, an inner shell and a cutter head of the push bench, and debugging the push bench;
the pipe jacking machine performs tunnel excavation along a preset construction line;
the push bench is operated to a preset position, and the cutter head is rotated into a central cavity of the shell;
grouting to strengthen the face and around the excavated tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550661.XA CN108729922B (en) | 2018-05-31 | 2018-05-31 | Push bench and retractable push bench construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550661.XA CN108729922B (en) | 2018-05-31 | 2018-05-31 | Push bench and retractable push bench construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108729922A CN108729922A (en) | 2018-11-02 |
| CN108729922B true CN108729922B (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810550661.XA Active CN108729922B (en) | 2018-05-31 | 2018-05-31 | Push bench and retractable push bench construction method |
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| CN112627831B (en) * | 2020-12-04 | 2022-01-25 | 中铁工程装备集团有限公司 | Pipe jacking machine construction method |
| CN114961758B (en) * | 2022-07-29 | 2022-12-20 | 北京建工土木工程有限公司 | Modularized double-shell rectangular pipe jacking host machine and shelling, disassembling and remanufacturing method |
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