CN113404501A - Continuous tunneling construction method based on hexagonal duct piece - Google Patents
Continuous tunneling construction method based on hexagonal duct piece Download PDFInfo
- Publication number
- CN113404501A CN113404501A CN202110738311.8A CN202110738311A CN113404501A CN 113404501 A CN113404501 A CN 113404501A CN 202110738311 A CN202110738311 A CN 202110738311A CN 113404501 A CN113404501 A CN 113404501A
- Authority
- CN
- China
- Prior art keywords
- hexagonal
- plane
- propulsion oil
- tunneling
- oil cylinder
- 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
- 230000005641 tunneling Effects 0.000 title claims abstract description 57
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 description 12
- 238000005192 partition Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- 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
- E21D9/0621—Shield advancing devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a continuous tunneling construction method based on hexagonal pipe pieces, and belongs to the technical field of shield construction. The problem of among the prior art shield structure machine tunnelling and section of jurisdiction assemble can not go on simultaneously, influence the construction progress is solved. The invention comprises the following steps: the hexagonal pipe piece forms a first plane and a second plane which respectively correspond to the first propulsion oil cylinder and the second propulsion oil cylinder; the first propulsion oil cylinder is supported on the first plane and provides thrust for the tunneling of the shield tunneling machine, the second propulsion oil cylinder is in a retraction state, a space is reserved for the assembly of the hexagonal pipe piece, and meanwhile the hexagonal pipe piece connected with the second plane is assembled; after the segments are assembled in place, the propulsion oil cylinders corresponding to the newly assembled hexagonal segments are controlled to extend, so that the shield tunneling machine tunnels forwards, and meanwhile, the other propulsion oil cylinders are controlled to retract to reserve a space for assembling the next hexagonal segment; the continuous tunneling is realized by the circulation. The invention can realize continuous tunneling of the shield machine, improve the efficiency and shorten the construction period.
Description
Technical Field
The invention belongs to the technical field of shield construction, and particularly relates to a continuous tunneling construction method based on hexagonal pipe pieces.
Background
The shield machine is one of the key devices for developing tunnels and underground spaces at present, and is widely applied due to high construction efficiency, good safety and excellent construction effect. However, due to the limitation of the existing segment structure form and construction method, a certain problem still exists in the shield tunneling machine construction process. 1. The existing segment is mainly a 3+2+ 1-form segment, namely, the segment ring is formed by 3 standard blocks A, 2 adjacent blocks B and 1 capping block K, three forms need to be manufactured when the segment is prefabricated, the cost is high, a certain sequence is required during installation, the operation is inconvenient, and the control of a propulsion oil cylinder is inconvenient during tunneling. 2. In the current shield construction process, two working procedures of tunneling and segment assembling are carried out separately. When the shield tunneling machine tunnels, the segments are stopped being assembled, after the shield tunneling machine tunnels for a certain distance, the tunneling is stopped, the segments are assembled, and the tunneling is started again after the segments are assembled into a ring, so that the process is repeated. In the method, a large amount of time is occupied for tunneling and splicing, so that the construction progress is slow.
Disclosure of Invention
The invention provides a continuous tunneling construction method based on hexagonal segments, aiming at solving the problem that the tunneling of a shield tunneling machine and segment splicing cannot be carried out simultaneously in the prior art and the construction progress is influenced, and the method comprises the following steps: the continuous tunneling of the shield machine is realized, and the construction efficiency is improved.
The technical scheme adopted by the invention is as follows:
a continuous tunneling construction method based on hexagonal pipe pieces comprises the following steps:
step 1: construction preparation before tunneling;
step 2: the hexagonal pipe piece facing the tunneling direction of the shield tunneling machine forms a first plane and a second plane, and the first plane and the second plane are respectively and correspondingly provided with a first propulsion oil cylinder and a second propulsion oil cylinder;
and step 3: if the first plane is closer to the shield tunneling machine than the second plane, the first propulsion oil cylinder is supported on the first plane, the first propulsion oil cylinder is controlled to extend, so that the shield tunneling machine tunnels forwards, the second propulsion oil cylinder is in a retraction state, a space is reserved for assembling the hexagonal pipe pieces, and meanwhile the hexagonal pipe pieces connected with the second plane are assembled; if the second plane is closer to the shield tunneling machine than the first plane, the operation is opposite;
and 4, step 4: after the segments are assembled in place, the propulsion oil cylinders corresponding to the newly assembled hexagonal segments are controlled to extend, so that the shield tunneling machine tunnels forwards, and meanwhile, the other propulsion oil cylinders are controlled to retract to reserve a space for assembling the next hexagonal segment;
and 5: and (5) repeating the step (3) and the step (4) to realize the continuous tunneling of the shield machine.
After the technical scheme is adopted, the duct piece assembling and the shield tunneling machine tunneling can be carried out simultaneously, the efficiency is improved, and the construction period is shortened.
A hexagonal pipe piece structure applied to the continuous tunneling construction method is characterized in that each ring of pipe pieces is composed of a plurality of hexagonal pipe pieces, adjacent rings are spliced in a staggered mode, adjacent hexagonal pipe pieces are mutually embedded, and two opposite sides of each hexagonal pipe piece are parallel to the cross section of a tunnel.
After the technical scheme is adopted, the hexagonal pipe piece is assembled and the shield tunneling machine is in a propelling process, three surfaces of the hexagonal pipe piece are in contact with the formed pipe piece, the force transmitted by the propelling oil cylinder can be better borne, the force of the propelling oil cylinder can be transmitted to all hexagonal pipe pieces in the formed pipe piece, and the stress of the pipe piece is more uniform.
Preferably, each ring of pipe pieces consists of an even number of hexagonal pipe pieces.
Preferably, the plurality of hexagonal pipe pieces have the same width along the axial direction of the tunnel.
Preferably, the shapes of the hexagonal pipe pieces are the same, and two opposite sides have the same length and are parallel to each other.
After the optimal scheme is adopted, all the pipe pieces are universal, only one pipe piece is needed, the production cost of the pipe pieces can be saved, the assembling difficulty can be reduced, the partition control of the propulsion oil cylinder is facilitated when continuous tunneling is conducted, one hexagonal pipe piece corresponds to one partition, and the operation is simpler.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the process of assembling the hexagonal pipe piece and propelling the shield tunneling machine, three surfaces of the hexagonal pipe piece are in contact with the ring-formed pipe piece, so that the force transmitted by the propelling oil cylinder can be better borne, the force of the propelling oil cylinder can be transmitted to all the hexagonal pipe pieces in the ring-formed pipe piece, and the stress of the pipe pieces is more uniform.
2. All the pipe pieces are universal, only one pipe piece is needed, the production cost and the assembling difficulty of the pipe pieces can be saved, the partition control of the propulsion oil cylinder during continuous tunneling is facilitated, one hexagonal pipe piece corresponds to one partition, and the operation is simpler.
3. The invention can realize the simultaneous assembly of the duct piece and the excavation of the shield machine, improve the efficiency and shorten the construction period.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic illustration of a hexagonal tube sheet structure;
FIG. 2 is a schematic illustration of a hexagonal tube sheet prior to assembly;
FIG. 3 is a schematic illustration of hexagonal tube pieces after they have been assembled;
the device comprises a base, a first plane, a second plane, a shield tunneling machine, a first propulsion oil cylinder and a second propulsion oil cylinder, wherein the first plane is 1-the first plane, the second plane is 2-the second plane, the shield tunneling machine is 3-the first propulsion oil cylinder is 4-the second propulsion oil cylinder is 5-the first propulsion oil cylinder is provided.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The present invention will be described in detail with reference to fig. 1.
Example 1
In the present embodiment, each ring segment is composed of six hexagonal segments, adjacent rings are spliced in a staggered manner, adjacent hexagonal segments are mutually embedded, and two opposite sides of each hexagonal segment are parallel to the cross section of the tunnel, as shown in fig. 1.
As shown in fig. 1, each hexagonal tube piece has the same shape, and two opposite sides have the same length and are parallel to each other. Two first planes 1 and second planes 2 for supporting the propulsion cylinder are formed on the same ring pipe sheet.
A continuous tunneling method of a shield tunneling machine based on the hexagonal segment structure comprises the following steps:
step 1: construction preparation before tunneling; the method comprises the steps of positioning a shield tunneling machine, installing a reaction frame, prefabricating a hexagonal pipe piece, hoisting and transporting to a specified position;
step 2: as shown in fig. 2, a first plane 1 corresponds to the position of a first propulsion cylinder 4, and a second plane 2 corresponds to the position of a second propulsion cylinder 5;
and step 3: the first propulsion oil cylinder 4 is supported on the first plane 1, the first propulsion oil cylinder 4 is controlled to extend, so that the shield machine 3 tunnels forwards, the second propulsion oil cylinder 5 is in a retraction state, a space is reserved for splicing the hexagonal pipe pieces, and meanwhile, the hexagonal pipe pieces connected with the second plane 2 are spliced;
and 4, step 4: as shown in fig. 3, after three hexagonal pipe pieces connected with the second plane 2 are assembled in place, the second thrust cylinder 5 is controlled to extend, so that the shield tunneling machine continues to tunnel forwards, and the first thrust cylinder 4 is controlled to retract, so as to reserve a space for assembling three hexagonal pipe pieces connected with the first plane 1;
and 5: and (5) repeating the step (3) and the step (4), controlling the first propulsion oil cylinder (4) and the second propulsion oil cylinder (5) to alternately extend and retract, and assembling hexagonal pipe pieces at the retracted propulsion oil cylinders to realize continuous tunneling of the shield machine.
Example 2
A hexagonal segment structure, in this embodiment, each ring segment is composed of eight hexagonal segments (in another embodiment, the number of each ring segment and the radian of each segment can be determined according to the size of a tunnel), adjacent rings are spliced in a staggered manner, adjacent hexagonal segments are mutually embedded, and two opposite edges of each hexagonal segment are parallel to the cross section of the tunnel.
In this embodiment, each of the hexagonal tube sheets has the same shape, and the lengths of the two sides parallel to the cross section of the tunnel are greater than the lengths of the remaining 4 sides, and the lengths of the remaining 4 sides are equal and the two opposite sides are parallel to each other. Two first planes 1 and second planes 2 for supporting the propulsion cylinder are formed on the same ring pipe sheet.
The method for splicing the hexagonal pipe pieces and the continuous tunneling method of the shield tunneling machine in the embodiment are the same as those in the embodiment 1, and are not described again.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (5)
1. A continuous tunneling construction method based on hexagonal pipe pieces is characterized by comprising the following steps:
step 1: construction preparation before tunneling;
step 2: the hexagonal pipe piece facing the tunneling direction of the shield tunneling machine forms a first plane and a second plane, and the first plane and the second plane are respectively and correspondingly provided with a first propulsion oil cylinder and a second propulsion oil cylinder;
and step 3: if the first plane is closer to the shield tunneling machine than the second plane, the first propulsion oil cylinder is supported on the first plane, the first propulsion oil cylinder is controlled to extend, so that the shield tunneling machine tunnels forwards, the second propulsion oil cylinder is in a retraction state, a space is reserved for assembling the hexagonal pipe pieces, and meanwhile the hexagonal pipe pieces connected with the second plane are assembled; if the second plane is closer to the shield tunneling machine than the first plane, the operation is opposite;
and 4, step 4: after the segments are assembled in place, the propulsion oil cylinders corresponding to the newly assembled hexagonal segments are controlled to extend, so that the shield tunneling machine tunnels forwards, and meanwhile, the other propulsion oil cylinders are controlled to retract to reserve a space for assembling the next hexagonal segment;
and 5: and (5) repeating the step (3) and the step (4) to realize the continuous tunneling of the shield machine.
2. A hexagonal segment structure applied to the continuous tunneling construction method according to claim 1, wherein each segment of the ring is composed of a plurality of hexagonal segments, adjacent rings are spliced in a staggered manner, adjacent hexagonal segments are mutually embedded, and two opposite sides of the hexagonal segments are parallel to the cross section of the tunnel.
3. A hexagonal tube sheet structure according to claim 2, wherein each ring of tube sheets is composed of an even number of hexagonal tube sheets.
4. A hexagonal tube sheet structure according to claim 2, wherein the plurality of hexagonal tube sheets have the same width in the direction of the tunnel axis.
5. A hexagonal tube sheet structure according to claim 2, wherein the plurality of hexagonal tube sheets have the same shape, and two opposite sides have the same length and are parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110738311.8A CN113404501A (en) | 2021-06-30 | 2021-06-30 | Continuous tunneling construction method based on hexagonal duct piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110738311.8A CN113404501A (en) | 2021-06-30 | 2021-06-30 | Continuous tunneling construction method based on hexagonal duct piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113404501A true CN113404501A (en) | 2021-09-17 |
Family
ID=77680631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110738311.8A Pending CN113404501A (en) | 2021-06-30 | 2021-06-30 | Continuous tunneling construction method based on hexagonal duct piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113404501A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08254097A (en) * | 1995-03-15 | 1996-10-01 | Kajima Corp | Shield tunnel and shield construction method |
| JPH1181887A (en) * | 1997-09-03 | 1999-03-26 | Sumitomo Constr Co Ltd | Shield tunnel lining body |
| CN202250098U (en) * | 2011-09-05 | 2012-05-30 | 中铁第四勘察设计院集团有限公司 | Pipe piece lining structure capable of providing continuous counterforce action face used for shield tunnel |
| CN105781577A (en) * | 2016-05-03 | 2016-07-20 | 西南交通大学 | Dodecagonal segment for shield tunnel construction and segment lining structure |
| CN105840201A (en) * | 2016-03-29 | 2016-08-10 | 中铁工程装备集团有限公司 | TBM advancing and duct piece assembling synchronization work method |
| CN109519194A (en) * | 2018-12-13 | 2019-03-26 | 西南交通大学 | The hexagon section of jurisdiction in the tunnel boring machine tunnel on swelled ground stratum and construction method |
| CN110159280A (en) * | 2019-06-24 | 2019-08-23 | 中铁工程装备集团有限公司 | A kind of synchronous construction system and its construction method |
| CN110359934A (en) * | 2019-08-21 | 2019-10-22 | 中国铁建重工集团股份有限公司 | Hexagon section of jurisdiction, supporting construction and method for tunnel construction |
| CN110469337A (en) * | 2019-09-04 | 2019-11-19 | 中交天和机械设备制造有限公司 | A kind of method that shield machine tunnels synchronous segment assembly |
| CN112324461A (en) * | 2020-12-30 | 2021-02-05 | 中铁工程装备集团有限公司 | Continuous tunneling machine based on spiral duct piece and construction method |
| CN212535698U (en) * | 2020-06-02 | 2021-02-12 | 中铁十二局集团第二工程有限公司 | Negative ring canal piece fixing device |
-
2021
- 2021-06-30 CN CN202110738311.8A patent/CN113404501A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08254097A (en) * | 1995-03-15 | 1996-10-01 | Kajima Corp | Shield tunnel and shield construction method |
| JPH1181887A (en) * | 1997-09-03 | 1999-03-26 | Sumitomo Constr Co Ltd | Shield tunnel lining body |
| CN202250098U (en) * | 2011-09-05 | 2012-05-30 | 中铁第四勘察设计院集团有限公司 | Pipe piece lining structure capable of providing continuous counterforce action face used for shield tunnel |
| CN105840201A (en) * | 2016-03-29 | 2016-08-10 | 中铁工程装备集团有限公司 | TBM advancing and duct piece assembling synchronization work method |
| CN105781577A (en) * | 2016-05-03 | 2016-07-20 | 西南交通大学 | Dodecagonal segment for shield tunnel construction and segment lining structure |
| CN109519194A (en) * | 2018-12-13 | 2019-03-26 | 西南交通大学 | The hexagon section of jurisdiction in the tunnel boring machine tunnel on swelled ground stratum and construction method |
| CN110159280A (en) * | 2019-06-24 | 2019-08-23 | 中铁工程装备集团有限公司 | A kind of synchronous construction system and its construction method |
| CN110359934A (en) * | 2019-08-21 | 2019-10-22 | 中国铁建重工集团股份有限公司 | Hexagon section of jurisdiction, supporting construction and method for tunnel construction |
| CN110469337A (en) * | 2019-09-04 | 2019-11-19 | 中交天和机械设备制造有限公司 | A kind of method that shield machine tunnels synchronous segment assembly |
| CN212535698U (en) * | 2020-06-02 | 2021-02-12 | 中铁十二局集团第二工程有限公司 | Negative ring canal piece fixing device |
| CN112324461A (en) * | 2020-12-30 | 2021-02-05 | 中铁工程装备集团有限公司 | Continuous tunneling machine based on spiral duct piece and construction method |
Non-Patent Citations (4)
| Title |
|---|
| 孙文安: "全断面双护盾掘进机六边形管片衬砌结构设计探讨", 《水利建设与管理》 * |
| 孙文安: "全断面双护盾掘进机六边形管片衬砌结构设计探讨", 《水利建设与管理》, vol. 27, no. 06, 23 June 2007 (2007-06-23) * |
| 郑军等: "大型深基坑开挖的有限元分析", 《结构工程师》 * |
| 郑军等: "大型深基坑开挖的有限元分析", 《结构工程师》, no. 05, 28 October 2012 (2012-10-28) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021203625A1 (en) | Composite supporting structure, and construction system and method | |
| TWI698575B (en) | Method of constructing very large underground space and outer shield tunnel | |
| CN104747207A (en) | Mid-partition rectangular tunnel segmental lining and segment splicing method | |
| CN113404501A (en) | Continuous tunneling construction method based on hexagonal duct piece | |
| EP3830393A1 (en) | Equipment assembly | |
| CN110630278A (en) | Rectangular shield tunnel lining ring and rectangular shield tunnel lining structure | |
| CN112796776B (en) | Shield tunnel segment structure and construction method thereof | |
| CN112610250B (en) | Method for dismantling three rock pillar supports of large-span underground cave depot | |
| CN112324461A (en) | Continuous tunneling machine based on spiral duct piece and construction method | |
| CN112196585B (en) | Anchor-shotcreting latticed shell supporting system for coal mine tunnel | |
| CN211081879U (en) | Prefabricated lining circular seam staggered joint assembling structure for tunneling tunnel by mechanical method | |
| CN210087324U (en) | Synchronous construction system | |
| CN217080485U (en) | Novel shield tunnel segment structure | |
| CN214836425U (en) | Seepage-proofing and waterproof tunnel structure | |
| CN116291508A (en) | Construction method for assembling, starting, disassembling and hoisting shield in tunnel | |
| CN212358542U (en) | Assembled underground flow guiding operation device | |
| CN112576285A (en) | Method for dismantling double-rock-pillar support of huge-span underground cave depot | |
| CN112814702B (en) | Shield constructs machine and synchronous translation mechanism of whole circular ware of section of jurisdiction thereof | |
| SU1232817A1 (en) | Trunk pipeline of mechanized mining set | |
| CN214787449U (en) | Mounting device for support system of heading machine | |
| JP2019123997A (en) | Tunnel lining structure and tunnel lining construction method | |
| CN215444054U (en) | Shield starting counter force system for narrow space | |
| JP6425010B2 (en) | Large cross section tunnel structure and method for constructing the same | |
| CN113389571B (en) | Construction method for improving anti-seismic performance of shield segment structure joint by arranging inclined circular seam | |
| CN208707276U (en) | A kind of pipeline precast assembly comb module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210917 |