CN112647963A - Construction method for shield to obliquely penetrate existing ground wall - Google Patents
Construction method for shield to obliquely penetrate existing ground wall Download PDFInfo
- Publication number
- CN112647963A CN112647963A CN202011515562.1A CN202011515562A CN112647963A CN 112647963 A CN112647963 A CN 112647963A CN 202011515562 A CN202011515562 A CN 202011515562A CN 112647963 A CN112647963 A CN 112647963A
- Authority
- CN
- China
- Prior art keywords
- shield
- ground wall
- existing ground
- machine
- shield tunneling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 62
- 230000005641 tunneling Effects 0.000 claims abstract description 55
- 239000002689 soil Substances 0.000 claims abstract description 46
- 230000000149 penetrating effect Effects 0.000 claims abstract description 19
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- 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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0671—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes
-
- 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
Abstract
The invention relates to a construction method for obliquely penetrating an existing ground wall by a shield, which comprises the following steps: s11, lowering the shield tunneling machine to the side, far away from the existing ground wall, of the newly-built ground wall, and manually chiseling off part of the newly-built ground wall until the sandwich soil body is exposed to form a hole corresponding to the shield tunneling machine; s12, propelling the shield tunneling machine to the sandwich soil body until a cutter head of the shield tunneling machine props against the surface of the sandwich soil body, and injecting mortar into a soil bin of the shield tunneling machine to build soil pressure; and S13, starting the shield tunneling machine, and controlling the propelling speed of the shield tunneling machine and the torque of the cutter head so that the shield tunneling machine can cut the sandwiched soil body and the existing ground wall and penetrate through the existing ground wall. The construction method effectively solves the problem that the existing inclined through ground wall is difficult to construct, can directly utilize the shield to excavate, saves time and labor, has high construction speed, can reduce construction risks, improves construction efficiency and ensures construction quality.
Description
Technical Field
The invention relates to the field of shield construction, in particular to a construction method for obliquely penetrating an existing ground wall by a shield.
Background
When the structure to be excavated needs to be penetrated obliquely through the existing ground wall, the structure to be excavated is usually excavated by adopting a mine method, but the mine method is used for excavating according to the sequence and the regions, so that the construction period is longer in the actual excavation process, the exposure time of a sandwich soil body between the newly-built ground wall and the existing ground wall of the structure to be excavated is longer, the stability of the soil body is poorer, the construction risk is higher, the process of the method is complicated, the construction efficiency cannot be ensured, and the operation environment is poorer.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a construction method for obliquely penetrating an existing ground wall by a shield, solves the problem of difficulty in constructing the obliquely penetrating existing ground wall, can directly utilize the shield to perform excavation, saves time and labor, has high construction speed, can reduce construction risks, improves construction efficiency and ensures construction quality.
The technical scheme for realizing the purpose is as follows:
the invention provides a construction method for a shield to obliquely penetrate an existing ground wall, wherein a newly-built ground wall is formed on one side of the existing ground wall in a construction mode, and a sandwich soil body is sandwiched between the existing ground wall and the newly-built ground wall, and the construction method comprises the following steps:
s11, lowering the shield tunneling machine to the side, far away from the existing ground wall, of the newly-built ground wall, and manually chiseling off part of the newly-built ground wall until the sandwich soil body is exposed to form a hole corresponding to the shield tunneling machine;
s12, propelling the shield tunneling machine to the sandwich soil body until a cutter head of the shield tunneling machine props against the surface of the sandwich soil body, and injecting mortar into a soil bin of the shield tunneling machine to build soil pressure;
and S13, starting the shield tunneling machine, and controlling the propelling speed of the shield tunneling machine and the torque of the cutter head so that the shield tunneling machine can cut the sandwiched soil body and the existing ground wall and penetrate through the existing ground wall.
The invention provides a construction method for a shield to obliquely penetrate an existing ground wall, which comprises the steps of manually chiseling part of a newly-built ground wall to form a hole, then abutting a cutter head of a shield machine against the surface of a sandwich soil body, injecting mortar into a soil bin before the shield machine is started to build soil pressure in advance, so that the cutter head is uniformly stressed, uneven stress when the cutter head cuts the sandwich soil body and the existing ground wall is avoided, further, the propelling speed of the shield machine and the torque of the cutter head are controlled to prevent a screw machine of the shield machine from being clamped by reinforcing steel bars of the existing ground wall, the stable posture of the shield machine is ensured, the problem of difficulty in obliquely penetrating the existing ground wall is solved, the shield can be directly used for excavation, time and labor are saved, the construction speed is high, the construction risk can be reduced, the construction efficiency is improved, and the construction quality is ensured.
The construction method for obliquely penetrating the existing ground wall by the shield machine is further improved in that a set included angle is formed between the existing ground wall and a cutter head of the shield machine;
the soil pressure established before the shield machine cuts is 0.1 Mpa.
The construction method for the shield to obliquely penetrate the existing ground wall is further improved in that the torque of the cutter head is less than or equal to 2000 kN.m.
The construction method for obliquely penetrating the existing ground wall by the shield machine is further improved in that when the shield machine cuts the existing ground wall, the method further comprises the following steps:
and controlling the cutter head to rotate forwards and reversely for alternate cutting.
The construction method for obliquely penetrating the existing ground wall by the shield machine is further improved in that the propelling speed of the shield machine is controlled within the range of 2-5 mm/s.
The construction method for obliquely penetrating the existing ground wall by the shield machine is further improved in that after the shield machine cuts and passes through the existing ground wall, the construction method further comprises the following steps:
and plugging the hole by using an arc-shaped steel plate.
The construction method for obliquely penetrating the existing ground wall by the shield is further improved in that before the excavation of the opening, the construction method further comprises the following steps:
keep away from one side installation base and the reaction frame of existing ground wall in newly-built ground wall, transfer the shield structure machine to the top of base to the one end that keeps away from the blade disc with the shield structure machine supports and leans on in the reaction frame.
The construction method for obliquely penetrating the existing ground wall by the shield machine is further improved in that when the shield machine cuts the existing ground wall and the sandwich soil body, the construction method further comprises the following steps:
and inspecting the base and the reaction frame.
The construction method for obliquely penetrating the existing ground wall by the shield machine is further improved in that before the shield machine is started, the construction method further comprises the following steps:
and an anti-rotation device is arranged at the side part of the shield tunneling machine close to the base so as to prevent the shield tunneling machine from integrally twisting.
The construction method for obliquely penetrating the existing ground wall by the shield machine is further improved in that the shield machine adopts a combined earth pressure balance shield machine.
Drawings
FIG. 1 is a flow chart of a construction method for shield tunneling to obliquely penetrate an existing ground wall.
Fig. 2 is a schematic structural view of a newly-built ground wall before chiseling in the construction method for obliquely penetrating the existing ground wall by the shield.
Fig. 3 is a schematic structural view after a cave opening is formed in the construction method for obliquely penetrating the existing ground wall by the shield.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The invention provides a construction method for a shield to obliquely penetrate an existing ground wall, which is characterized in that after a part of newly-built ground wall is manually chiseled to form a hole, a cutter head of a shield machine is attached to the surface of a sandwich soil body, mortar is injected into a soil bin before the shield machine is started to build soil pressure in advance, so that the cutter head is uniformly stressed, uneven stress when the cutter head cuts the sandwich soil body and the existing ground wall is avoided, further, the propelling speed of the shield machine and the torque of the cutter head are controlled to prevent a screw machine of the shield machine from being clamped by reinforcing steel bars of the existing ground wall, the stable posture of the shield machine is ensured, the problem of difficulty in obliquely penetrating the existing ground wall is solved, the shield can be directly used for excavation, time and labor are saved, the construction speed is high, the construction risk can be reduced, the construction efficiency is improved, and the construction quality is ensured. The construction method of the shield obliquely penetrating the existing ground wall is explained below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flow chart of a construction method for shield tunneling to obliquely penetrate an existing ground wall according to the present invention. The construction method of the shield obliquely penetrating the existing ground wall of the invention is explained below with reference to fig. 1.
As shown in fig. 1, 2 and 3, the present invention provides a construction method for a shield to obliquely penetrate an existing ground wall, that is, a plane where a cutter head of a shield machine is located and a plane where the existing ground wall is located have a certain angle, and the angle is not 90 °, that is, the cutter head of the shield machine cannot be attached to the surface of the existing ground wall 11, so that the cutter head is not uniformly stressed, a newly-built ground wall 12 is formed by constructing on one side of the existing ground wall 11, and a sandwiched soil body 13 is sandwiched between the existing ground wall 11 and the newly-built ground wall 12, the construction method includes the following steps:
step S11, the shield tunneling machine 14 is lowered to the side, away from the existing ground wall 11, of the newly-built ground wall 12, and a part of the newly-built ground wall 12 is manually chiseled off until the sandwiched soil body 13 is exposed, so that a hole 121 corresponding to the shield tunneling machine 14 is formed; then, step S12 is executed
Step S12, propelling the shield tunneling machine 14 to the sandwiched soil body 13 until a cutter head of the shield tunneling machine 14 props against the surface of the sandwiched soil body 13, and injecting mortar into a soil bin of the shield tunneling machine 14 to build soil pressure; then, step S13 is executed
And S13, starting the shield tunneling machine 14, and controlling the propelling speed of the shield tunneling machine 14 and the torque of the cutterhead, so that the shield tunneling machine 14 cuts the sandwiched soil body 13 and the existing ground wall 11 and penetrates through the existing ground wall 11.
Further, after the shield machine 14 cuts and passes through the existing ground wall 11, the shield machine further includes:
the hole 121 is sealed by an arc-shaped steel plate.
Further, before the opening 121 is excavated, the method further includes:
installing a base 15 and a reaction frame 16 on one side of the newly-built ground wall 12 far away from the existing ground wall 11, lowering the shield tunneling machine 14 to the top of the base 15, and abutting one end of the shield tunneling machine 14 far away from the cutterhead against the reaction frame 16.
Specifically, when the shield machine 14 cuts the existing ground wall 11 and the sandwiched soil body 13, the shield machine further comprises:
the base 15 and the reaction frame 16 are inspected to ensure the stability of the base 15 and the reaction frame 16.
Preferably, the shield machine 14 is a composite earth pressure balance shield machine.
As a preferred embodiment of the present invention, a set included angle is formed between the existing ground wall 11 and the cutter head of the shield tunneling machine 14, that is, the existing ground wall 11 is not parallel to the cutter head, and if direct cutting is performed, the cutter head is stressed unevenly;
the earth pressure established before the cutting of the shield machine 14 is 0.1Mpa, and the cutter head can be stressed uniformly by establishing pressure in advance.
Further, before starting the shield tunneling machine 14, the method further includes:
an anti-rotation device is installed at a side portion of the shield tunneling machine 14 near the base 15 to prevent the shield tunneling machine 14 from being twisted integrally.
Specifically, the anti-rotation device may be a bracket fixed at a position on a side portion of the outer shell of the shield machine 14 near the base 15 to fix the outer shell of the shield machine 14 and prevent the body of the shield machine 14 from rotating due to an excessive torque.
Further, the torque of the cutter head is not more than 2000 kN.m.
Further, when the shield tunneling machine 14 cuts the existing ground wall 11, the method further includes:
the forward and reverse rotation alternate cutting of the cutter head is controlled to prevent the instantaneous torque of the cutter head from being overlarge, and the screw machine can be prevented from being clamped by reinforcing steel bars by cutting the reinforcing steel bars in the existing ground wall 11 through the alternate forward and reverse rotation of the cutter head.
Furthermore, the propelling speed of the shield machine 14 is controlled within the range of 2-5mm/s, and a constant-speed slow propelling mode is adopted to ensure the stability of the existing ground wall and ensure the uniform stress of the cutter head.
The specific embodiment of the invention is as follows:
excavating a side, close to a newly-built ground wall 12 and located on the newly-built ground wall 12 and far away from an existing ground wall 11, to form a vertical working well, installing a base 15 and a reaction frame 16 at the bottom of the well, lowering a shield machine 14 to the top of the base 15 and abutting against the reaction frame 16, and installing an anti-rotation device at a position, close to the base 15, on the side part of the shield machine 14 so as to prevent the shield machine 14 body from rotating due to overlarge torque;
manually excavating at a position, corresponding to a cutter head of the shield tunneling machine 14, of the newly-built ground wall 12 to form a hole 121, and extending the cutter head of the shield tunneling machine 14 into the hole 121 and attaching the cutter head to the surface of the sandwiched soil body 13;
injecting mortar into a soil bin of the shield machine 14 to pre-establish soil pressure, starting the shield machine 14 after the soil pressure is established, enabling a cutter head of the shield machine 14 to cut the sandwiched soil body 13 and the existing ground wall 11, and controlling the torque of the cutter head and the propelling speed of the shield machine 14 in the cutting process, so that the shield machine 14 is propelled at a constant speed and a slow speed, and the cutter head is guaranteed to be stressed uniformly as much as possible;
when the existing ground wall 11 is cut, the cutting is carried out in a mode that the cutter head rotates forwards and reversely alternately, so that the situation that a spiral machine of the shield machine 14 is clamped by reinforcing steel bars in the existing ground wall 11 is prevented, and overlarge torque of the cutter head can be avoided;
after the shield tail brush part of the shield tunneling machine 14 passes through the hole 121, the hole 121 is sealed by an arc-shaped steel plate, and the shield tunneling machine is continuously pushed until the shield tunneling machine 14 obliquely passes through the existing ground wall.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A construction method for obliquely penetrating an existing ground wall by a shield is characterized by comprising the following steps of:
s11, a shield tunneling machine is lowered to one side, far away from the existing ground wall, of the newly-built ground wall, and a part of the newly-built ground wall is manually chiseled until the sandwich soil body is exposed, so that a hole corresponding to the shield tunneling machine is formed;
s12, propelling the shield tunneling machine to the sandwich soil body until a cutter head of the shield tunneling machine props against the surface of the sandwich soil body, and injecting mortar into a soil bin of the shield tunneling machine to build soil pressure;
and S13, starting the shield tunneling machine, and controlling the propelling speed of the shield tunneling machine and the torque of the cutter head so that the shield tunneling machine cuts the sandwich soil body and the existing ground wall and penetrates through the existing ground wall.
2. The construction method for the shield to obliquely penetrate the existing ground wall according to claim 1, wherein a set included angle is formed between the existing ground wall and a cutter head of the shield tunneling machine;
the soil pressure established before the shield machine cuts is 0.1 Mpa.
3. The construction method for the shield to obliquely penetrate the existing ground wall according to claim 1, wherein the torque of the cutter head is less than or equal to 2000 kN-m.
4. The construction method for the shield to obliquely penetrate the existing ground wall according to claim 1, wherein when the shield machine cuts the existing ground wall, the method further comprises the following steps:
and controlling the cutter head to rotate forwards and reversely for alternate cutting.
5. The construction method for shield tunneling to pass through an existing ground wall obliquely as claimed in claim 1, wherein the advancing speed of the shield tunneling machine is controlled within the range of 2-5 mm/s.
6. The method of claim 1, wherein the shield tunneling machine cuts and passes through the existing ground wall, and further comprising:
and plugging the hole by using an arc-shaped steel plate.
7. The construction method of the shield tunneling obliquely-penetrating existing ground wall according to claim 1, before excavating and forming the hole, further comprising:
in newly-built ground wall is kept away from one side mounting base and the reaction frame of existing ground wall will the shield constructs the machine and transfers to the top of base, and will the shield constructs the machine and keeps away from the one end of blade disc support by in the reaction frame.
8. The construction method for the shield to obliquely penetrate the existing ground wall according to claim 7, wherein when the shield machine cuts the existing ground wall and the sandwiched soil body, the construction method further comprises the following steps:
and inspecting the base and the reaction frame.
9. The construction method for shield tunneling to obliquely penetrate existing ground wall according to claim 7, wherein before starting the shield tunneling machine, the method further comprises:
and installing an anti-rotation device at the position, close to the base, of the side part of the shield machine to prevent the shield machine from being integrally twisted.
10. The construction method for the shield to obliquely penetrate the existing ground wall according to claim 1, wherein the shield machine adopts a composite earth pressure balance shield machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011515562.1A CN112647963A (en) | 2020-12-21 | 2020-12-21 | Construction method for shield to obliquely penetrate existing ground wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011515562.1A CN112647963A (en) | 2020-12-21 | 2020-12-21 | Construction method for shield to obliquely penetrate existing ground wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112647963A true CN112647963A (en) | 2021-04-13 |
Family
ID=75358643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011515562.1A Pending CN112647963A (en) | 2020-12-21 | 2020-12-21 | Construction method for shield to obliquely penetrate existing ground wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112647963A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203961994U (en) * | 2014-07-17 | 2014-11-26 | 中铁十一局集团城市轨道工程有限公司 | Under balancing earth-pressure shielding machine, wear the concealed tunneling structure of having runed shield tunnel |
| CN104653186A (en) * | 2013-11-25 | 2015-05-27 | 天津城建隧道股份有限公司 | Method of earth pressure balance shield crossing reinforced concrete pile foundation building |
| CN104912562A (en) * | 2015-06-30 | 2015-09-16 | 中铁一局集团有限公司 | Construction method for deformation control over existing operation tunnel crossing under shield |
| CN108049878A (en) * | 2017-11-13 | 2018-05-18 | 浙江大学城市学院 | A kind of powder land floor shield cuts the construction method that stake is crossed the river |
| CN109707388A (en) * | 2019-01-07 | 2019-05-03 | 中铁十一局集团城市轨道工程有限公司 | The method of surface collapse when preventing shield launching from wearing existing shield tunnel down |
| CN110130909A (en) * | 2019-06-21 | 2019-08-16 | 中建八局轨道交通建设有限公司 | The construction method of building up station is worn under a kind of shield in powder land floor |
| CN111335902A (en) * | 2020-04-23 | 2020-06-26 | 中铁四局集团有限公司 | Construction method for shield tunneling ground connection wall underpass operation subway station |
-
2020
- 2020-12-21 CN CN202011515562.1A patent/CN112647963A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653186A (en) * | 2013-11-25 | 2015-05-27 | 天津城建隧道股份有限公司 | Method of earth pressure balance shield crossing reinforced concrete pile foundation building |
| CN203961994U (en) * | 2014-07-17 | 2014-11-26 | 中铁十一局集团城市轨道工程有限公司 | Under balancing earth-pressure shielding machine, wear the concealed tunneling structure of having runed shield tunnel |
| CN104912562A (en) * | 2015-06-30 | 2015-09-16 | 中铁一局集团有限公司 | Construction method for deformation control over existing operation tunnel crossing under shield |
| CN108049878A (en) * | 2017-11-13 | 2018-05-18 | 浙江大学城市学院 | A kind of powder land floor shield cuts the construction method that stake is crossed the river |
| CN109707388A (en) * | 2019-01-07 | 2019-05-03 | 中铁十一局集团城市轨道工程有限公司 | The method of surface collapse when preventing shield launching from wearing existing shield tunnel down |
| CN110130909A (en) * | 2019-06-21 | 2019-08-16 | 中建八局轨道交通建设有限公司 | The construction method of building up station is worn under a kind of shield in powder land floor |
| CN111335902A (en) * | 2020-04-23 | 2020-06-26 | 中铁四局集团有限公司 | Construction method for shield tunneling ground connection wall underpass operation subway station |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210413 |
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| RJ01 | Rejection of invention patent application after publication |