CN111173520A - Combined pipe jacking system and construction method - Google Patents
Combined pipe jacking system and construction method Download PDFInfo
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- CN111173520A CN111173520A CN202010151470.3A CN202010151470A CN111173520A CN 111173520 A CN111173520 A CN 111173520A CN 202010151470 A CN202010151470 A CN 202010151470A CN 111173520 A CN111173520 A CN 111173520A
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- 238000010276 construction Methods 0.000 title claims abstract description 52
- 239000002689 soil Substances 0.000 claims abstract description 10
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 10
- 238000009412 basement excavation Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract 2
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 230000009974 thixotropic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a combined pipe jacking system. Comprises a standard tool pipe, a footing tool pipe, a corner tool pipe and a symmetrical tool pipe; all be equipped with location guider on standard tool pipe, footing tool pipe and the corner tool pipe, all be equipped with on standard tool pipe, corner tool pipe and the symmetry tool pipe with location guider assorted recess for realize the concatenation location of standard tool pipe, footing tool pipe, corner tool pipe and symmetry tool pipe along tunnel boundary contour line. The invention also provides a construction method of the combined pipe jacking system, which comprises the steps of confirming four tool pipe splicing modes according to the sizes of the tunnel and the tool pipe; carrying out blocking and subsection pipe jacking construction on the tunnel; pushing the prefabricated tunnel pipe joint to replace a tool pipe; and excavating a soil body, binding a reinforcement cage, and pouring the bottom of the tunnel. According to the invention, through the positioning splicing among the tool pipes, the blocking pushing construction can be carried out on the tunnel, and the working difficulty of the pushing construction of the large-section rectangular tunnel is reduced.
Description
Technical Field
The invention relates to the field of tunnel construction, in particular to a combined pipe jacking system and a construction method.
Background
The pipe jacking technique is a construction technique used for crossing various obstacles such as railways, roads, rivers, buildings and the like in underground pipe construction, and has been widely used in recent years for construction of urban traffic pedestrian roadways and underground common ditches. According to the traditional large-section rectangular pipe-jacking tunnel construction, tool pipe joints with the same shape as the section of a tunnel need to be manufactured for jacking, a large-scale pipe-jacking machine with the same size as the excavated section is adopted for jacking construction, thixotropic slurry needs to be used for reducing the friction force between the tool pipe joints and rock soil during jacking construction, and therefore the pipe-jacking construction faces a great deal of difficulties that the construction technology is complex, ground settlement is difficult to control, the tool pipe joints are difficult to manufacture and transport, large-scale counterforce wall facilities are needed, resistance-reducing slurry pollution is caused and the like.
In view of the above, there is a need for a combined pipe jacking system and construction method to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a combined pipe jacking system and a construction method, which aim to solve the problem of difficult pipe jacking construction of a large-section rectangular tunnel.
In order to achieve the purpose, the invention provides a combined pipe jacking system which comprises a standard tool pipe, a footing tool pipe and a corner tool pipe; at least one standard tool pipe is spliced between the footing tool pipe and the corner tool pipe along the vertical direction; at least one standard tool pipe is spliced between the two corner tool pipes along the horizontal direction; all be equipped with location guider on standard tool pipe, footing tool pipe and the corner tool pipe, all be equipped with on standard tool pipe and the corner tool pipe with location guider assorted recess for realize the concatenation location of standard tool pipe, footing tool pipe and corner tool pipe along tunnel structure face boundary contour line.
Preferably, the cross sections of the standard tool pipe, the footing tool pipe and the corner tool pipe along the length direction are rectangular, and the lengths of the sides of the standard tool pipe, the footing tool pipe and the corner tool pipe, which are provided with the positioning guide devices or the grooves, are the same, so that the pipe sections of the pipe jacking tool are spliced along the boundary contour line of the tunnel structure surface.
Preferably, the positioning guide device is at least one uniform-section bulge arranged on the side wall of the first splicing side of the adjacent tool pipe along the length direction of the standard tool pipe and the corner tool pipe.
Preferably, the positioning guide device and the groove of the standard tool pipe are respectively arranged on two opposite side walls of the standard tool pipe; and the positioning guide device and the groove of the corner tool pipe are respectively arranged on two adjacent side walls of the corner tool pipe so as to realize positioning splicing between the adjacent tool pipes.
Preferably, the footing tool tube comprises a footing tube and a footing block which are detachably connected; the side wall of the splicing side of the footing tube and the standard tool tube is provided with a positioning guide device along the length direction of the footing tool tube; the top of the base foot block is provided with a track mounting seat for realizing the pushing track mounting of the prefabricated tunnel pipe joint.
Preferably, the combined pipe jacking system further comprises a symmetrical tool pipe; the section of the symmetrical tool pipe along the length direction is the same as that of the corner tool pipe along the length direction; the side walls of the splicing sides of the symmetrical tool pipe and the adjacent standard tool pipe are provided with grooves along the length direction of the symmetrical tool pipe, so that the splicing of pipe sections of the pipe jacking tool along the boundary contour line of the porous tunnel structural surface is realized.
Preferably, the combined pipe jacking system further comprises a resistance reducing steel plate; resistance-reducing steel sheet can be dismantled along tunnel structure face outer boundary contour line and connect standard tool pipe, footing instrument pipe, corner instrument pipe and symmetry instrument pipe and ground contact side for resistance when reducing the instrument pipe jacking.
The invention also provides a construction method of the combined pipe jacking system, which adopts the combined pipe jacking system to realize the construction of the rectangular tunnel and comprises the following steps:
the method comprises the following steps: determining the boundary contour line of the tunnel structure surface, the number of four tool pipes and a splicing combination mode according to the tunnel structure to be excavated and the size of the tool pipes;
step two: carrying out block and subsection pipe jacking construction on the space of the boundary part of the tunnel, and jacking the tool pipe section by section until the tunnel is communicated;
step three: separating the footing tubes of all footing tool tubes from the footing blocks, mounting a full-length track on a track mounting seat of the footing blocks, and pushing prefabricated tunnel tube sections along the track at an originating well to replace the tool tubes at the upper parts of the footing blocks until all the tool tubes are pushed to a receiving well;
step four: under the protection of the prefabricated tunnel pipe joints, excavating soil in the tunnel section by adopting a subsurface excavation method, binding an inverted arch or a bottom plate reinforcement cage, and then pouring the bottom of the tunnel until the tunnel is communicated.
Preferably, in the second step, the construction sequence of the jacking pipes is from bottom to top along the boundary contour line of the tunnel structural plane, and the two sides are arranged at the front and the middle.
Preferably, in the fourth step, a steel bar connecting sleeve is embedded at the bottom of the prefabricated tunnel pipe joint and is used for being connected with an inverted arch or a bottom plate steel bar cage.
The technical scheme of the invention has the following beneficial effects:
(1) according to the invention, through arranging the standard tool pipe, the footing tool pipe and the corner tool pipe which are provided with the positioning guide device and the groove, after the pushing units are divided along the tunnel structural plane, the single-hole tunnel can be subjected to block pushing construction through positioning splicing among the tool pipes, a large pushing counter-force wall is not required, and the working difficulty of pushing construction of the large-section rectangular tunnel is reduced.
(2) According to the invention, the large-section rectangular tunnel construction pipe jacking tool pipe is divided into the standard tool pipe, the footing tool pipe, the corner tool pipe and the symmetrical tool pipe, so that the manufacturing difficulty of the pipe joint of the pipe jacking tool is reduced, standardized and modularized splicing is realized among the tool pipes, and the pipe jacking construction of a single-hole tunnel and a multi-hole tunnel is favorably completed.
(3) According to the invention, by arranging the positioning guide device and the groove, the positioning error of the splicing of the tool pipe joints is reduced, and the qualification rate of tunnel construction is improved.
(4) According to the invention, the footing tube and the footing blocks form the footing tool tube, so that splicing positioning between pipe joints of the pipe jacking tool can be met, a pushing tunnel track mounting seat can be provided for the prefabricated tunnel pipe joint, and construction errors of the prefabricated tunnel pipe joint replacement tool pipe joint are reduced.
(5) According to the invention, the anti-drag steel plate is arranged between the tool pipe joint and the rock soil on the outer side of the tunnel, so that the frictional resistance between the tool pipe joint and the rock soil during pushing construction can be reduced, and the soil pollution caused by using thixotropic slurry can be avoided.
(6) According to the construction method, the incremental launching units are divided on the tunnel structural surface according to the tunnel structure and the size of the tool pipe joints, the combined tool pipe joints are used for block and subsection incremental launching construction, small-section tool pipe construction is adopted, equipment is simple, the repeated utilization rate is high, the single-time excavation section is small, only jacking is carried out on the boundary, disturbance on the surrounding environment is small, and stratum settlement deformation can be well controlled.
(7) According to the invention, under the protection of the prefabricated tunnel pipe joints, soil bodies inside the pipe joints are excavated section by adopting an underground excavation method, inverted arches or bottom plate reinforcement cages are bound, the reinforcement cages are connected with reinforcement connecting sleeves pre-embedded in the prefabricated tunnel pipe joints, then the bottom of the tunnel is poured until the tunnel is communicated, the precision of tunnel construction can be improved, the defect of poor integrity of the spliced prefabricated pipe joints is further overcome, and the longitudinal uneven deformation resistance of the structure is improved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a splicing structure of a combined pipe jacking system according to the present application;
FIG. 2 is a schematic of a configuration of a master tool tube;
FIG. 3 is a schematic view of the construction of the footing tool tube;
FIG. 4 is an elevation view of a corner tool tube;
FIG. 5 is a front view of a symmetrical tool tube;
FIG. 6 is a schematic diagram of a jacking unit divided according to the contour line of a tunnel structural surface and the size of a tool pipe;
FIG. 7 is a schematic view of the jacking sequence of each jacking pipe construction section;
FIG. 8 is a schematic structural view of a prefabricated tunnel pipe section;
FIG. 9 is a schematic view of the replacement of a tool tube with a prefabricated tunnel tube section;
FIG. 10 is an elevation view of the tunnel after excavation of the earth within the tunnel;
FIG. 11 is an elevation view of an integrated tunnel with completed tunnel floor casting;
the device comprises a standard tool pipe, a footing block, a rail mounting seat, a corner tool pipe, a positioning guide device, a groove, a symmetrical tool pipe, a resistance reducing steel plate, 8 prefabricated tunnel pipe sections and 8.1 steel bar connecting sleeves, wherein the standard tool pipe is 2, the footing tool pipe is 2.1, the footing block is 2.2.1, the rail mounting seat is 3, the corner tool pipe is 4, the positioning guide device is 5, the groove is 6, the symmetrical tool pipe is 7, the resistance reducing steel plate is 8, and the steel bars.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1 to 5, the present embodiment of a combined pipe jacking system is applied to pipe jacking construction in tunnels.
A combined pipe jacking system comprises a standard tool pipe 1, a footing tool pipe 2 and a corner tool pipe 3; at least one standard tool pipe 1 is spliced between the footing tool pipe 2 and the corner tool pipe 3 along the vertical direction; at least one standard tool pipe 1 is spliced between the two corner tool pipes 3 along the horizontal direction; all be equipped with location guider 4 on standard tool pipe 1, footing instrument pipe 2 and the corner instrument pipe 3, all be equipped with on standard tool pipe 1 and the corner instrument pipe 3 with location guider 4 assorted recess 5 for realize the concatenation location of standard tool pipe 1, footing instrument pipe 2 and corner instrument pipe 3 along tunnel structure face boundary contour line, when carrying out the construction of haplopore rectangle tunnel, only need use standard tool pipe 1, footing instrument pipe 2 and corner instrument pipe 3 can carry out the instrument pipe concatenation and push pipe construction according to tunnel structure face boundary contour line.
Referring to fig. 1, the combined pipe jacking system further comprises a symmetrical tool pipe 6 for porous rectangular tunnel construction, wherein the symmetrical tool pipe 6 is arranged at a jacking unit at the top of a supporting wall in the middle of a tunnel, two horizontal side walls of the symmetrical tool pipe 6 are spliced with standard tool pipes 1 at two sides, and the bottom of the symmetrical tool pipe 6 is spliced with the standard tool pipe 1 below; the side walls of the splicing sides of the symmetrical tool pipe 6 and the standard tool pipe 1 are provided with grooves 5 along the length direction of the symmetrical tool pipe 6, and the grooves 5 are used for being matched with a positioning guide device 4 on the standard tool pipe 1 to splice pipe sections of the pipe jacking tool along the boundary contour line of the porous tunnel structural surface.
Referring to fig. 1, the cross sections of the standard tool pipe 1, the footing tool pipe 2 and the corner tool pipe 3 along the length direction thereof are rectangular, the side lengths of the sides of the standard tool pipe 1, the footing tool pipe 2 and the corner tool pipe 3 provided with the positioning guide devices 4 or the grooves 5 are the same, the cross section of the symmetrical tool pipe 6 along the length direction thereof is the same as the cross section of the corner tool pipe 3 along the length direction thereof, so as to realize the splicing of the pipe sections of the pipe jacking tool along the boundary contour line of the tunnel structure surface.
Referring to fig. 2 or 4, the positioning guide 4 is at least one constant-section protrusion arranged on the side wall of the first splicing side of the standard tool pipe 1 and the corner tool pipe 3 along the length direction of the standard tool pipe, the cross-section shape of the positioning guide 4 can be semicircular, triangular, rectangular and the like, and in the embodiment, the positioning guide 4 is two constant-section protrusions with semicircular cross sections along the length direction of the tool pipe section.
Referring to fig. 2 or 4, the positioning guide 4 and the groove 5 of the master tool pipe 1 are respectively arranged on two opposite side walls of the master tool pipe 1; and the positioning guide device 4 and the groove 5 of the corner tool pipe 3 are respectively arranged on two adjacent side walls of the corner tool pipe 3 so as to realize positioning splicing between the adjacent tool pipes.
Referring to fig. 3, the footing tool pipe 2 includes a footing pipe 2.1 and a footing block 2.2 detachably connected; the side wall of the splicing side of the footing tube 2.1 and the standard tool tube 1 is provided with a positioning guide device 4 along the length direction of the footing tool tube 2; the top of base foot piece 2.2 is equipped with track mount pad 2.2.1 for realize the top of prefabricated tunnel coupling 8 and push away the track installation, prefabricated tunnel coupling 8 bottom is equipped with and pushes away track complex spout, when being convenient for tunnel construction, replaces the instrument pipe with prefabricated tunnel coupling 8.
Referring to fig. 1 to 5, a combined push pipe system further includes a drag reduction steel plate 7; resistance reducing steel sheet 7 can dismantle along tunnel structure face outer boundary contour line and connect in standard tool pipe 1, footing instrument pipe 2, corner instrument pipe 3 and symmetry instrument pipe 6 and ground contact side for resistance when reducing the instrument pipe jacking, resistance reducing steel sheet 7's front end is connected with the first instrument tube coupling of every jacking unit, and move to the tunnel receiving well along the jacking of instrument tube coupling, after a section distance is advanced in the jacking, at the last resistance reducing steel sheet of the welding back of the terminal welding of preceding resistance reducing steel sheet 7, until resistance reducing steel sheet 7 accomplishes the tunnel full length along tunnel structure face boundary contour line and arranges, lean on the country rock side at the tunnel boundary and set up full length resistance reducing steel sheet 7, can reduce the friction of prefabricated tunnel tube coupling 8 in the follow-up jacking in-process and the soil body on the one hand, avoid the back of the earth effect, on the other hand can avoid using thixotropic mud, reduce environmental pollution.
Referring to fig. 6 to 11, a construction method of a combined pipe jacking system, which adopts the combined pipe jacking system to realize the construction of a rectangular tunnel, is characterized by comprising the following steps:
the method comprises the following steps: determining the boundary contour line of a tunnel structure surface, the number of four tool pipes and a splicing combination mode according to the size of a tunnel structure to be excavated and the size of the tool pipes, and referring to fig. 6, the schematic diagram of dividing a jacking unit for double-hole tunnel construction is shown;
step two: carrying out block and subsection pipe jacking construction on the space of the boundary part of the tunnel, jacking the tool pipes section by section, connecting the front ends of the resistance reducing steel plates 7 with the first tool pipe section of each jacking unit, and moving the tool pipe sections to a tunnel receiving well along with jacking of the tool pipe sections until the tunnel is through;
step three: separating the footing tubes 2.1 and the footing blocks 2.2 of all the footing tool tubes 2, mounting a full-length track on a track mounting seat 2.2.1 of the footing block 2.2, releasing the connection between the resistance-reducing steel plate 7 and the tool tube sections, fixing the resistance-reducing steel plate 7 on a rock-soil wall in contact with the resistance-reducing steel plate 7, and pushing the prefabricated tunnel tube sections 8 along the track at an originating well to replace the tool tubes on the upper parts of the footing blocks 2.2 until all the tool tubes are pushed to a receiving well, as shown in fig. 9;
step four: under the protection of the prefabricated tunnel pipe joints 8, excavating the soil in the tunnel section by adopting a subsurface excavation method, as shown in figure 10; then binding an inverted arch or a bottom plate reinforcement cage, and pouring the bottom of the tunnel until the tunnel is communicated, as shown in fig. 11.
And in the second step, the construction sequence of the jacking pipes is from bottom to top along the boundary contour line of the tunnel structural plane, firstly from two sides to the middle, as shown in FIG. 7.
In the fourth step, a steel bar connecting sleeve 8.1 is embedded at the bottom of the prefabricated tunnel pipe joint 8 and is used for being connected with an inverted arch or a bottom plate steel bar cage, so that the stability of the tunnel structure can be enhanced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A combined pipe jacking system is characterized by comprising a standard tool pipe (1), a footing tool pipe (2) and a corner tool pipe (3); at least one standard tool pipe (1) is spliced between the footing tool pipe (2) and the corner tool pipe (3) along the vertical direction; at least one standard tool pipe (1) is spliced between the two corner tool pipes (3) along the horizontal direction; all be equipped with location guider (4) on standard tool pipe (1), footing tool pipe (2) and corner tool pipe (3), all be equipped with on standard tool pipe (1) and corner tool pipe (3) with location guider (4) assorted recess (5) for realize the concatenation location of standard tool pipe (1), footing tool pipe (2) and corner tool pipe (3) along tunnel structure face boundary contour line.
2. The combined pipe jacking system of claim 1, wherein the cross sections of the standard tool pipe (1), the footing tool pipe (2) and the corner tool pipe (3) along the length direction thereof are rectangular, and the lengths of the sides of the standard tool pipe (1), the footing tool pipe (2) and the corner tool pipe (3) provided with the positioning guide devices (4) or the grooves (5) are the same, so as to realize the splicing of pipe jacking tool pipe sections along the boundary contour line of the tunnel structure surface.
3. A modular push bench system as claimed in claim 1, wherein the positioning guides (4) are at least one constant cross-section protrusion provided on the side walls of the first splicing side of the adjacent tool tubes along the length direction of the standard tool tubes (1) and the corner tool tubes (3).
4. A modular push bench system according to claim 1, where the positioning guides (4) and the grooves (5) of the master tool pipe (1) are arranged on two opposite side walls of the master tool pipe (1), respectively; and the positioning guide device (4) and the groove (5) of the corner tool pipe (3) are respectively arranged on two adjacent side walls of the corner tool pipe (3) to realize positioning splicing between the adjacent tool pipes.
5. A modular push bench system as claimed in claim 1 or 3, characterised in that the footing tool tube (2) comprises a footing tube (2.1) and a footing block (2.2) that are detachably connected; the side wall of the splicing side of the footing tube (2.1) and the standard tool tube (1) is provided with a positioning guide device (4) along the length direction of the footing tool tube (2); and the top of the base foot block (2.2) is provided with a track mounting seat (2.2.1) for realizing the pushing track mounting of the prefabricated tunnel pipe joint.
6. A modular push bench system according to claim 1, further comprising a symmetrical tool pipe (6); the section of the symmetrical tool pipe (6) along the length direction is the same as that of the corner tool pipe (3) along the length direction; the side wall of the splicing side of the symmetrical tool pipe (6) and the adjacent standard tool pipe (1) is provided with a groove (5) along the length direction of the symmetrical tool pipe (6) so as to realize splicing of the pipe sections of the pipe jacking tool along the boundary contour line of the porous tunnel structural surface.
7. A modular push bench system as claimed in claim 5, further comprising a drag reducing steel plate (7); resistance reduction steel sheet (7) can be dismantled along tunnel structure face outer boundary contour line and connect in standard tool pipe (1), footing instrument pipe (2), corner instrument pipe (3) and symmetry instrument pipe (6) and ground contact side for resistance when reducing the instrument pipe jacking.
8. A construction method of a combined pipe jacking system, which adopts the combined pipe jacking system as claimed in any one of claims 1 to 7 to realize the construction of a rectangular tunnel, and is characterized by comprising the following steps:
the method comprises the following steps: determining the boundary contour line of the tunnel structure surface, the number of four tool pipes and a splicing combination mode according to the tunnel structure to be excavated and the size of the tool pipes;
step two: carrying out block and subsection pipe jacking construction on the space of the boundary part of the tunnel, and jacking the tool pipe section by section until the tunnel is communicated;
step three: separating the footing tubes (2.1) and the footing blocks (2.2) of all the footing tool tubes (2), mounting a full-length track on a track mounting seat (2.2.1) of each footing block (2.2), and pushing prefabricated tunnel tube joints along the track to replace the tool tubes on the upper parts of the footing blocks (2.2) in an originating well until all the tool tubes are pushed to a receiving well;
step four: under the protection of the prefabricated tunnel pipe joints, excavating soil in the tunnel section by adopting a subsurface excavation method, binding an inverted arch or a bottom plate reinforcement cage, and then pouring the bottom of the tunnel until the tunnel is communicated.
9. The construction method of a combined pipe jacking system according to claim 8, wherein in the second step, the pipe jacking construction sequence is from bottom to top along the boundary contour line of the tunnel structural surface, first from two sides to the middle.
10. The construction method of a combined pipe jacking system according to claim 8, wherein in the fourth step, a steel bar connecting sleeve is embedded at the bottom of the prefabricated tunnel pipe section and is used for being connected with an inverted arch or a bottom plate steel bar cage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010151470.3A CN111173520A (en) | 2020-03-06 | 2020-03-06 | Combined pipe jacking system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010151470.3A CN111173520A (en) | 2020-03-06 | 2020-03-06 | Combined pipe jacking system and construction method |
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| CN111173520A true CN111173520A (en) | 2020-05-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946353A (en) * | 2020-08-11 | 2020-11-17 | 济南轨道交通集团有限公司 | Station guide hole and underground excavation station construction method for passing through existing operation station at zero distance |
| CN111997662A (en) * | 2020-09-07 | 2020-11-27 | 中铁工程装备集团有限公司 | Rectangular or quasi-rectangular oversized-section underground space construction method and construction system |
-
2020
- 2020-03-06 CN CN202010151470.3A patent/CN111173520A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946353A (en) * | 2020-08-11 | 2020-11-17 | 济南轨道交通集团有限公司 | Station guide hole and underground excavation station construction method for passing through existing operation station at zero distance |
| CN111997662A (en) * | 2020-09-07 | 2020-11-27 | 中铁工程装备集团有限公司 | Rectangular or quasi-rectangular oversized-section underground space construction method and construction system |
| CN111997662B (en) * | 2020-09-07 | 2022-02-15 | 中铁工程装备集团有限公司 | Rectangular or quasi-rectangular oversized-section underground space construction method and construction system |
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