CN108978716B - Open-cut construction method of push bench - Google Patents
Open-cut construction method of push bench Download PDFInfo
- Publication number
- CN108978716B CN108978716B CN201810897283.2A CN201810897283A CN108978716B CN 108978716 B CN108978716 B CN 108978716B CN 201810897283 A CN201810897283 A CN 201810897283A CN 108978716 B CN108978716 B CN 108978716B
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- Prior art keywords
- pipe jacking
- push bench
- groove
- shell
- jacking machine
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
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- 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
Abstract
The invention belongs to the technical field of civil engineering, and particularly relates to an open excavation construction method of a push bench. The method comprises the following steps: digging a preset groove along a design route, wherein the depth of the preset groove is greater than the height of the push bench, and the width of the groove is less than the width of the push bench in an area with the same height as the push bench; the pipe jacking machine is placed at an initial section of a preset groove, earthwork on two sides of the groove is excavated from an initial end, and a pipe jacking device in the pipe jacking machine is pushed out of a box culvert backwards during excavation. Compared with the open cut technology, the method reduces the excavated earth volume generated in the excavation process, reduces the excavated earth volume, and can reduce the labor cost and the transportation cost. Compared with the underground excavation process, the excavation process of the push bench can be visualized, collapse caused by unknown conditions is avoided, the underground excavation and open excavation process are matched, and the construction efficiency of the push bench is improved. In conclusion, the method has the advantages of low labor cost, small damage to the ground environment and low risk.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to an open excavation construction method of a push bench.
Background
At present, the construction process of underground pipelines comprises an open excavation mode and a subsurface excavation mode, wherein most of the open excavation is realized by matching excavating machinery with manpower, and the subsurface excavation is realized by equipment such as a pipe jacking machine and a shield machine.
The open cut method has the advantages of simple and quick construction, is used as a preferred excavation technology in the initial development stage of urban underground tunnel engineering, and has the defects of large influence on the environment and large excavated earthwork.
The underground excavation method is not influenced by the ground surface environment, has no influence on the road traffic on the ground during construction, but can cause collapse due to unexpected danger, is slow in progress, has huge consumption, and is easily limited by geology.
Disclosure of Invention
Technical problem to be solved
Aiming at the existing technical problems, the invention provides an open cut construction method of a push bench, which can solve the defects of large excavated earth volume and large influence on the environment in open cut and the problem of easy geological restriction in underground cut in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a pipe jacking machine open cut construction method comprises the following steps: the pipe jacking machine comprises a shell, a pipe jacking machine cutter head, a tunnel positioning bin and a pipe jacking device, wherein the shell is a rectangular shell, and the pipe jacking machine cutter head is positioned at the front end of the shell; the tunnel positioning bin is provided with a cavity structure which is surrounded by four side plates and has openings at the front end and the rear end, the cavity structure is connected with the rear end of the shell, the front opening of the tunnel positioning bin is butted with the opening end of the shell, and a feeding hole for placing a box culvert is formed in the side plate at the upper end of the tunnel positioning bin; the pipe jacking device comprises a top plate, a pipe jacking oil cylinder and a fixed seat, wherein the fixed seat is fixedly arranged in the shell, the top plate is arranged towards the opening end of the shell, one end of the pipe jacking oil cylinder is connected with the fixed seat, and the other end of the pipe jacking oil cylinder is connected with the top plate;
the pipe jacking machine open cut construction method comprises the following steps:
digging a preset groove along a design route, wherein the depth of the preset groove is greater than the height of a push bench, and the width of the preset groove is smaller than the width of the push bench in an area where the preset groove is as high as the push bench;
an originating section and a receiving section are respectively arranged at two ends of the preset groove, and the push bench is placed at the originating section of the preset groove;
the pipe jacking machine cutterhead starts to excavate earthwork on two sides of the preset groove from the starting end, so that the preset groove reaches the designed width;
during excavation, a hoisting device is adopted to place the box culvert to be paved into the tunnel positioning bin through the feeding hole, and then a pipe jacking device is used for ejecting the box culvert to the rear through a pipe jacking oil cylinder;
after the pipe jacking device ejects out a section of box culvert in the tunnel positioning bin, a top plate of the pipe jacking device retreats, the hoisting device puts a section of new box culvert into the tunnel positioning bin, then the pipe jacking device performs an ejection process, and the process is repeated until the preset laying length is completed.
Preferably, in the excavation process of the preset trench, an excavation machine is used for excavating the preset trench, and excavated excavation soil is piled on both sides of the preset trench.
Preferably, the preset groove is a trapezoidal groove, and the width of the upper end of the groove is larger than that of the push bench.
Preferably, the method for placing the push bench in the starting section of the preset groove comprises the following steps: and hoisting the push bench into the starting section in sections, and then splicing the sections in the starting section.
Preferably, the box culvert splicing is further included before the pipe jacking device pushes the box culvert backwards, and the box culvert is spliced in the tunnel positioning bin.
Preferably, the method further comprises the step of controlling the position of the pipe jacking machine, the position of the pipe jacking machine is detected in the excavation process of the pipe jacking machine, and when the pipe jacking machine deviates from a preset route, the angle between shell sections of a shell of the pipe jacking machine is adjusted, so that the position of the pipe jacking machine is finely adjusted.
Preferably, after the box culvert is laid according to the designed route, the box culvert also comprises backfilling of excavated soil.
Preferably, before the pipe jacking machine excavates, the method further comprises the step of starting the cutter head of the pipe jacking machine, wherein the cutting cutter head located at the center of the front end of the pipe jacking machine is started firstly, then the positioning angle cutter heads located at four corners of the front end of the pipe jacking machine are started, and the four positioning angle cutter heads are ensured to rotate synchronously.
(III) advantageous effects
The invention has the beneficial effects that: according to the pipe jacking machine open-cut construction method, the trench is dug in a mode of open-cut and underground-cut, compared with an open-cut process, the excavated earth volume generated in the digging process is reduced, the excavated earth volume is reduced, the labor and transportation cost can be reduced, and the influence on the environment due to the accumulation of the earth is reduced. Compared with the underground excavation process, the excavation process of the push bench can be visualized, collapse caused by unknown conditions is avoided, and the construction efficiency of the push bench is improved through the cooperation of the underground excavation process and the open excavation process. In summary, the construction process has the advantages of low labor cost, small damage to the ground environment and low risk.
Drawings
Fig. 1 is a schematic internal structural diagram of an open top machine according to an embodiment of the present invention;
FIG. 2 is a front view of a pipe jacking apparatus according to an embodiment of the present invention;
fig. 3 is a bottom view of the open top machine according to the embodiment of the present invention.
[ description of reference ]
1: a housing; 2: a cutter head is cut; 3: positioning an angle cutter head; 4: a screw conveyor; 5: a deviation rectifying cylinder; 6: a pipe jacking oil cylinder; 7: a column; 8: a corrugated plate; 9: reinforcing ribs; 10: a box culvert;
11: a first housing section; 12: a second housing section; 13: a third housing section; 14: the tunnel locates the storehouse.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
The invention discloses an open cut construction method of a push bench, which comprises the following steps: digging a preset groove along a design route, wherein the depth of the preset groove is greater than the height of the push bench, and the width of the groove is less than the width of the push bench in an area with the same height as the push bench;
the pipe jacking machine is placed at an initial section of a preset groove, earthwork on two sides of the groove is excavated from an initial end, and a pipe jacking device in the pipe jacking machine is pushed out of a box culvert backwards during excavation.
In the embodiment, the trench is excavated by combining open excavation and underground excavation, so that compared with an open excavation process, the excavated earth volume generated in the excavation process is reduced, the excavated earth volume is reduced, the labor and transportation cost can be reduced, and the influence on the environment due to the accumulation of the earth is reduced. Compared with the underground excavation process, the excavation process of the push bench can be visualized, collapse caused by unknown conditions is avoided, and the construction efficiency of the push bench is improved through the cooperation of the underground excavation process and the open excavation process. In summary, the construction process has the advantages of low labor cost, small damage to the ground environment and low risk.
In the excavation process of the preset trench, excavation of the preset trench is performed by adopting an excavating machine, and excavated excavation soil is piled on two sides of the preset trench. And after the box culvert is laid according to the designed route, backfilling excavated soil.
The preset groove is a trapezoidal groove, and the width of the upper end of the groove is larger than that of the push bench.
The two ends of the preset groove are respectively provided with an originating section and a receiving section, and the method for placing the push bench in the originating section of the preset groove comprises the following steps: and hoisting the push bench into the starting section in sections, and then splicing the sections in the starting section.
The pipe jacking device further comprises box culvert splicing before the box culvert is ejected backwards by the pipe jacking device, a tunnel positioning bin is arranged at the rear end of the pipe jacking machine, and the box culvert is spliced in the tunnel positioning bin.
Hoisting the box culvert into the tunnel positioning bin section by adopting a hoisting device, and then ejecting the box culvert in the tunnel positioning bin section by a pipe jacking device.
After the pipe jacking device ejects out a section of box culvert in the tunnel positioning bin, a top plate of the pipe jacking device retreats, the hoisting device puts a section of new box culvert into the tunnel positioning bin, then the pipe jacking device performs an ejection process, and the process is repeated until the preset laying length is completed.
The pipe jacking machine open-cut construction method further comprises the step of controlling the position of the pipe jacking machine, the position of the pipe jacking machine is detected in the excavation process of the pipe jacking machine, when the pipe jacking machine deviates from a preset route, the angle between shell sections of a shell of the pipe jacking machine is adjusted, and the position of the pipe jacking machine is finely adjusted.
Before the pipe jacking machine excavates, the method also comprises the starting of a cutter head of the pipe jacking machine, wherein the cutting cutter head positioned at the center of the front end of the pipe jacking machine is started firstly, then the positioning angle cutter heads positioned at the four corners of the front end of the pipe jacking machine are started, and the synchronous rotation of the four positioning angle cutter heads is ensured.
As shown in fig. 1 to 3, in the present embodiment, there is also provided an open top pipe machine using the above construction method, which includes a housing 1 and a pipe jacking device, and the pipe jacking device is disposed at a rear end of the housing.
The pipe jacking device comprises a top plate, a pipe jacking oil cylinder 6 and a fixing seat, wherein the fixing seat is fixedly arranged in the shell 1, the top plate is arranged towards the opening end of the shell, one end of the pipe jacking oil cylinder 6 is connected with the fixing seat, and the other end of the pipe jacking oil cylinder is connected with the top plate.
In the embodiment, in the excavation process of the groove, firstly, an excavating machine is adopted to excavate a section of groove, the depth of the groove is larger than the height of the pipe jacking machine, the width of the groove is smaller than the width of the pipe jacking machine, then, the pipe jacking machine is adopted to cut the soil layer on the side wall of the groove, so that the groove reaches the designed width, when the pipe jacking machine is pushed forwards, the pipe jacking device pushes out the box culvert one section by one section to the rear part of the pipe jacking machine, the paving of the box culvert is realized, the clear-open pipe jacking machine has the advantage of high working efficiency in excavation of the groove and paving of the box culvert, the side wall of the groove is ensured to be the original soil layer, the usage amount of backfill soil is reduced, meanwhile, the amount of the soil required to be transferred in the.
Both sides on the top end of the shell 1 are provided with a protection plate. Specifically, the guard plate includes a plurality of evenly distributed's stand 7 to and set up the buckled plate 8 in the stand outside.
One end of the upright post 7 is fixedly connected with the top end of the shell 1, and a reinforcing rib plate 9 is arranged between the upright post 7 and the shell 1. Wherein, the upright post 7 is obliquely arranged towards the outer side.
By providing the protection plate at the top of the housing 1, the excavated soil on both sides of the trench can be prevented from falling onto the push bench.
The rear end of the shell 1 is also connected with a tunnel positioning bin 14, and the tunnel positioning bin 14 is a cavity type structure with openings at the front end and the rear end, which are surrounded by four side plates.
The front opening of the tunnel positioning bin 14 is butted with the opening end of the shell, and a feeding hole for placing the box culvert 10 is formed in the side plate at the upper end of the tunnel positioning bin 14.
In the excavation process, the box culvert 10 to be paved is placed into the tunnel positioning bin through the box culvert feeding port, and then the box culvert is ejected one section by one section through the pipe ejecting device in the shell 1.
The central position of the front end of the shell 1 is provided with a cutting cutter disc 2, four corners of the front end of the shell 1 are respectively provided with a positioning angle cutter disc 3, the positioning angle cutter discs 3 are arranged on the inner side of the cutting cutter disc 2, and the cutting cutter disc 2 and the positioning angle cutter discs 3 have a cross region. The crossing region here means a region where the two cross in the cut region.
The casing 1 is a rectangular casing, and the circumferential surface of the cutting cutter head 2 is tangent to the outer side surface of the side wall forming the casing 1.
The joint of the adjacent side walls of the shell 1 is of an arc structure, and the four positioning angle cutter heads 3 are respectively tangent to the corresponding arc structures.
The four positioning angle cutterheads 3 correspond to a driving motor respectively, and the four positioning angle cutterheads 3 synchronously rotate under the driving of the corresponding motors.
A conveying port is arranged at the lower part of the front end of the shell 1, and a spiral conveyor 4 connected with the conveying port is arranged in the shell 1.
In this embodiment, through the cooperation of location angle blade disc 3 and cutting blade disc 2, make push bench's effective cutting area can reach more than 90%, simultaneously, because four location angle blade discs 3 can cut the soil layer that push bench bight corresponds, prevent because of the problem that the skew appears in the push bench that geology soft or hard uneven leads to.
The arc structure is arranged in a concave manner along the axis direction of the push bench, and the four positioning angle cutter heads 3 are respectively tangent to the outer side surfaces of the corresponding arc structures. Through the indent setting of circular arc mechanism, prevent that casing 1 from causing the interference to location angle blade disc 3.
The cutting cutterhead 2 comprises an annular reinforcing rib and a plurality of blades which are uniformly distributed, the blades extend outwards by taking the circle center of the cutting cutterhead 2 as a starting point, and the inner side of the annular reinforcing rib is connected with the outer end parts of the blades.
The positioning angle cutterhead 3 comprises a plurality of uniform part positioning blades which extend outwards with the circle center of the positioning angle cutterhead 3 as a starting point.
Through the setting of the cylinder 5 of rectifying, can finely tune the angle of pipe jacking machine, through the setting of connecting axle, this connecting axle and the cylinder 5 cooperation of rectifying make and have formed the three-point type connection form between first casing festival 11 and the second casing festival 12, and stability when making to connect between first casing festival 11 and the second casing festival 12 or position control is stronger.
Furthermore, the rear end of the second shell section 12 is also sleeved with a third shell section 13, and the two sides of the second shell section 12 and the third shell section 13 are connected through one or a group of deviation rectifying cylinders 5. The angle range of adjustment of the push bench is improved by the arrangement of the third shell joint 13.
And a sealing structure is arranged between the contact surfaces of the shell sections which are mutually sleeved. The dust can be prevented from entering the housing by the arrangement of the sealing structure.
The matching relationship between the connecting shaft and the shell section is as follows: the shell section is provided with a mounting seat, a vertical shaft is arranged on the mounting seat, and the end part of the connecting shaft is sleeved on the vertical shaft and can rotate relative to the vertical shaft.
The back end of the shell 1 is provided with a counterweight, so that the gravity center of the shell is coincided with the centroid of the shell. Because, the main structural component of push bench is located the front end of casing, through set up the counter weight thing at casing rear end, can make push bench keep balance, prevents to appear the problem of push bench skew design route because of the head is heavy and the feet is light to lead to.
Be provided with the operation panel in the casing 1, this operation panel includes operation panel body and operation panel connecting rod, and the operation panel body passes through the operation panel connecting rod setting in the casing, and the operation panel connecting rod is multistage formula structure, is to rotate between the adjacent section and connects. The operation table with the arrangement mode has the problem that an operator can freely move the position of the operation table, and the operation table is convenient to use and operate.
The pipe jacking machine further comprises a pipe jacking device which is arranged in a split mode with the shell, the pipe jacking device comprises a top plate, a pipe jacking oil cylinder and a fixing seat, one end of the pipe jacking oil cylinder is connected with the fixing seat, and the other end of the pipe jacking oil cylinder is connected with the top plate. The pipe jacking device is used for jacking the box culvert section by section into a culvert excavated by the pipe jacking machine.
The technical principles of the present invention have been described above in connection with specific embodiments, which are intended to explain the principles of the present invention and should not be construed as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive efforts, which shall fall within the scope of the present invention.
Claims (8)
1. A pipe jacking machine open cut construction method is characterized in that: the pipe jacking machine comprises a shell (1), a pipe jacking machine cutter head, a tunnel positioning bin (14) and a pipe jacking device, wherein the shell (1) is a rectangular shell, and the pipe jacking machine cutter head is positioned at the front end of the shell (1);
the tunnel positioning bin (14) is provided with a cavity structure which is surrounded by four side plates and is provided with openings at the front end and the rear end, and is connected to the rear end of the shell (1), the front opening of the tunnel positioning bin (14) is butted with the opening end of the shell (1), and a feeding hole for placing a box culvert (10) is formed in the side plate at the upper end of the tunnel positioning bin (14);
the pipe jacking device comprises a top plate, a pipe jacking oil cylinder (6) and a fixed seat, wherein the fixed seat is fixedly arranged in the shell (1), the top plate is arranged towards the opening end of the shell (1), one end of the pipe jacking oil cylinder (6) is connected with the fixed seat, and the other end of the pipe jacking oil cylinder is connected with the top plate;
the pipe jacking machine open cut construction method comprises the following steps:
digging a preset groove along a design route, wherein the depth of the preset groove is greater than the height of a push bench, and the width of the preset groove is smaller than the width of the push bench in an area where the preset groove is as high as the push bench;
an originating section and a receiving section are respectively arranged at two ends of the preset groove, and the push bench is placed at the originating section of the preset groove;
the pipe jacking machine cutterhead starts to excavate earthwork on two sides of the preset groove from the starting end, so that the preset groove reaches the designed width;
when excavating, a hoisting device is adopted to place the box culvert (10) to be paved into the tunnel positioning bin (14) through the feeding hole, and then the pipe jacking device pushes out the box culvert (10) backwards through the pipe jacking oil cylinder (6);
after the pipe jacking device ejects out a section of box culvert (10) in the tunnel positioning bin (14), a top plate of the pipe jacking device retreats, the hoisting device puts a new section of box culvert (10) into the tunnel positioning bin (14), then the pipe jacking device performs an ejection process, and the process is repeated until the preset laying length is completed.
2. The pipe push bench open-cut construction method according to claim 1, wherein during excavation of the pre-groove, excavation of the pre-groove is performed using an excavating machine, and excavated earth is piled on both sides of the pre-groove.
3. The pipe push bench open cut construction method of claim 1, wherein the predetermined groove is a trapezoidal groove, and the width of the upper end of the groove is larger than the width of the pipe push bench.
4. The pipe jacking machine open cut construction method according to claim 1, wherein the method for placing the pipe jacking machine at the starting section of the preset groove comprises the following steps: and hoisting the push bench into the starting section in sections, and then splicing the sections in the starting section.
5. The pipe jacking machine open-cut construction method according to claim 1, further comprising box culvert splicing before the pipe jacking device pushes out a box culvert backwards, wherein the box culvert is spliced in the tunnel positioning bin (14).
6. The push bench open cut construction method of claim 1, further comprising controlling the position of the push bench, detecting the position of the push bench during the excavation process of the push bench, adjusting the angle between shell sections of the shell of the push bench when the push bench deviates from a preset route, and finely adjusting the position of the push bench.
7. The pipe jacking machine open cut construction method of claim 1, further comprising backfilling excavated soil after the box culvert is laid according to the designed route.
8. The pipe jacking machine open-cut construction method according to claim 1, further comprising starting the cutter head of the pipe jacking machine before the pipe jacking machine excavates, wherein the cutting cutter head located at the center of the front end of the pipe jacking machine is started first, then the positioning angle cutter heads located at four corners of the front end of the pipe jacking machine are started, and the four positioning angle cutter heads are ensured to rotate synchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810897283.2A CN108978716B (en) | 2018-08-08 | 2018-08-08 | Open-cut construction method of push bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810897283.2A CN108978716B (en) | 2018-08-08 | 2018-08-08 | Open-cut construction method of push bench |
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| Publication Number | Publication Date |
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| CN108978716A CN108978716A (en) | 2018-12-11 |
| CN108978716B true CN108978716B (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810897283.2A Expired - Fee Related CN108978716B (en) | 2018-08-08 | 2018-08-08 | Open-cut construction method of push bench |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110410577B (en) * | 2019-07-16 | 2022-04-12 | 中国建筑第八工程局有限公司 | Large-diameter pipe jacking resistance reduction construction method under miscellaneous fill geological condition |
Citations (4)
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|---|---|---|---|---|
| US5013189A (en) * | 1989-04-28 | 1991-05-07 | Kabushiki Kaisha Iseki Kaihatsu Koki | Intermediate pipe-jacking apparatus |
| CN201351497Y (en) * | 2009-02-10 | 2009-11-25 | 扬州广鑫机械有限公司 | Multi-cutter rectangle push bench |
| CN101963061A (en) * | 2010-10-19 | 2011-02-02 | 浙江省建工集团有限责任公司 | Construction method for underground box culvert of existing railway line |
| CN206468897U (en) * | 2017-01-23 | 2017-09-05 | 徐州徐工基础工程机械有限公司 | A kind of deviation correcting device of push-bench |
-
2018
- 2018-08-08 CN CN201810897283.2A patent/CN108978716B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5013189A (en) * | 1989-04-28 | 1991-05-07 | Kabushiki Kaisha Iseki Kaihatsu Koki | Intermediate pipe-jacking apparatus |
| CN201351497Y (en) * | 2009-02-10 | 2009-11-25 | 扬州广鑫机械有限公司 | Multi-cutter rectangle push bench |
| CN101963061A (en) * | 2010-10-19 | 2011-02-02 | 浙江省建工集团有限责任公司 | Construction method for underground box culvert of existing railway line |
| CN206468897U (en) * | 2017-01-23 | 2017-09-05 | 徐州徐工基础工程机械有限公司 | A kind of deviation correcting device of push-bench |
Non-Patent Citations (2)
| Title |
|---|
| 大口径钢筋混凝土排水管道施工新工艺——半开槽顶管施工技术介绍;郭伟等;《给水排水》;20121231;第100-103页第1-4节 * |
| 郭伟等.大口径钢筋混凝土排水管道施工新工艺——半开槽顶管施工技术介绍.《给水排水》.2012,第100-103页第1-4节. * |
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