CN111058478A - Immersed tube tunnel comprehensive grounding device and mounting method - Google Patents
Immersed tube tunnel comprehensive grounding device and mounting method Download PDFInfo
- Publication number
- CN111058478A CN111058478A CN201911315496.0A CN201911315496A CN111058478A CN 111058478 A CN111058478 A CN 111058478A CN 201911315496 A CN201911315496 A CN 201911315496A CN 111058478 A CN111058478 A CN 111058478A
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- bars
- grounding device
- immersed tube
- steel plate
- reinforcing steel
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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
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/17—Geometrical or physical properties including an electric conductive element
Abstract
The invention discloses a comprehensive grounding device for immersed tube tunnels, which is arranged on a steel reinforcement framework at intervals and comprises: a bottom steel plate waterproof layer; the bottom steel plate anchor bars are fixedly connected with the bottom steel plate waterproof layer; the annular reinforcing steel bars of the bottom plate are fixedly connected with the anchor bars of the two bottom steel plates at least through welding. An installation method of a comprehensive grounding device of a immersed tunnel is characterized in that the grounding device is arranged on a steel reinforcement framework at intervals, and comprises the following steps: arranging a bottom steel plate waterproof layer at the bottom of the immersed tube joint; fixedly connecting the waterproof layer of the bottom steel plate with the anchor bars of the bottom steel plate; fixedly connecting the annular reinforcing steel bars of the bottom plate with the anchor bars of the bottom steel plate; fixedly connecting the annular reinforcing steel bars of the bottom plate with the vertical reinforcing steel bars through the oblique reinforcing steel bars; and arranging grounding devices at intervals of 20-25 m in the longitudinal direction of the immersed tube joint. The invention is suitable for direct grounding of the long and large immersed tube tunnel, and has good comprehensive grounding effect.
Description
Technical Field
The invention relates to the technical field of immersed tube tunnels, in particular to a comprehensive grounding device of an immersed tube tunnel and an installation method.
Background
With the gradual solution and the gradual improvement of key technical problems in the design and construction of the immersed tube tunnel, the construction method for constructing the tunnel by the immersed tube method is more and more widely applied, and the cities such as Guangzhou, Ningbo, Shanghai, Nanchang, Buddha and the like in China build a plurality of immersed tube tunnels in succession. The immersed tube tunnel is a prefabricated component, and the comprehensive grounding device and the construction method are greatly different from the grounding modes of tunnels with a shield method, a mine method and an open cut method.
One of the traditional methods of tunnel comprehensive grounding is to perform annular grounding connection at the bottom of a structural slab outside a waterproof layer, and pre-embed hot-galvanized flat steel as a grounding outgoing line, but the difficulty of waterproof treatment is high; the other method is that a longitudinal electric conductor is arranged in the tunnel and is directly connected to the tunnel portal, and the grounding flat steel is buried outside the tunnel portal to carry out indirect grounding. Therefore, a device for direct grounding in long and large immersed tube construction needs to be developed, and a better grounding effect can be achieved.
Disclosure of Invention
The invention aims to provide a comprehensive grounding device of a immersed tube tunnel with good comprehensive grounding effect and an installation method.
In order to achieve the purpose, the invention provides a comprehensive grounding device of a immersed tube tunnel and an installation method thereof, and the specific technical scheme is as follows:
the utility model provides a ground device is synthesized in immersed tube tunnel, the ground device interval sets up on steel reinforcement framework, includes:
a bottom steel plate waterproof layer;
the bottom steel plate anchor bars are fixedly connected with the bottom steel plate waterproof layer;
the annular reinforcing steel bars of the bottom plate are fixedly connected with the anchor bars of the two bottom steel plates at least through welding.
Further, the spacing distance of the grounding device arranged in the longitudinal direction of the steel reinforcement framework is 20-25 m.
Furthermore, the annular reinforcing steel bars of the bottom plate are fixedly connected with the vertical reinforcing steel bars in the side walls and the middle wall through welding through the oblique reinforcing steel bars.
Furthermore, the grounding device also comprises a lead-out connecting terminal, the lead-out connecting terminal is arranged in the side wall cable trench and the middle wall cable gallery, and the lead-out connecting terminal is fixedly connected with the vertical steel bars.
An installation method of a comprehensive grounding device of a immersed tunnel is characterized in that the grounding device is arranged on a steel reinforcement framework at intervals, and comprises the following steps:
arranging a bottom steel plate waterproof layer at the bottom of the immersed tube joint;
fixedly connecting the waterproof layer of the bottom steel plate with the anchor bars of the bottom steel plate;
fixedly connecting the annular reinforcing steel bars of the bottom plate with at least two bottom steel plate anchor bars by welding;
fixedly connecting the annular reinforcing steel bars of the bottom plate with the vertical reinforcing steel bars through the oblique reinforcing steel bars;
and arranging grounding devices at intervals of 20-25 m in the longitudinal direction of the immersed tube joint.
Furthermore, lead-out connecting terminals are arranged in the side wall cable trench and the middle wall cable gallery, and the lead-out connecting terminals are welded with the vertical steel bars of the side wall and the middle wall in a cross mode.
The comprehensive grounding device for the immersed tube tunnel and the installation method have the advantages that:
1) the device is suitable for direct grounding of the long immersed tube tunnel;
2) the longitudinal connection measure of the steel bars and the bolts in the immersed tube joints is cancelled, so that the comprehensive grounding effect is good;
3) the bottom steel plate waterproof layer prefabricated in a factory is used as the pipe joint comprehensive grounding body, so that the construction quality is guaranteed;
4) the construction process is simple and the engineering investment is low.
Drawings
FIG. 1 is a detail of the ground body of the sinking pipe section in the invention;
fig. 2 is a schematic structural view of a cross section of a sink pipe section in the present invention.
In the figure: 1-bottom steel plate waterproof layer, 2-bottom steel plate anchor bar, 3-bottom plate oblique steel bar, 4-bottom plate annular steel bar, 5-cross welding point, 6-vertical steel bar and 7-leading-out connecting terminal.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, a comprehensive grounding device for immersed tube tunnel and an installation method thereof according to the present invention are further described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 2, which illustrate a comprehensive grounding device for a immersed tube tunnel according to the present invention, a steel reinforcement framework is disposed in a immersed tube joint, the grounding device is disposed on the steel reinforcement framework at intervals, and preferably, a circumferential grounding device is disposed at intervals of 20-25 m in a longitudinal direction of the steel reinforcement framework, so as to achieve grounding of an electrical system in the tunnel. The grounding device comprises a bottom steel plate waterproof layer 1, a plurality of bottom steel plate anchor bars 2, bottom plate oblique reinforcing steel bars 3, bottom plate annular reinforcing steel bars 4, vertical reinforcing steel bars 6 and lead-out connecting terminals 7.
Further, the bottom steel plate anchor bars 2 are fixedly connected with the bottom steel plate waterproof layer 1 of the immersed tube section through welding. Wherein, the bottom steel plate waterproof layer 1 is a comprehensive grounding body of the immersed tube joint, is prefabricated in a factory and has simple process.
Further, the annular reinforcing steel bars 4 of the bottom plate are connected with all the bottom steel plate anchor bars 2, and the annular reinforcing steel bars 4 of the bottom plate are annular. In the invention, each bottom plate circumferential reinforcing steel bar 4 is at least connected with two bottom steel plate anchor bars 2 in a welding mode, the welding connection points with the bottom steel plate anchor bars 2 are not less than two positions, namely at least two cross welding points 5 are included, and the rest bottom steel plate anchor bars 2 are connected with the bottom plate circumferential reinforcing steel bars in a non-welding mode.
Further, the annular reinforcing steel bars 4 of the bottom plate are welded and fixed with the vertical reinforcing steel bars 6 in the side wall and the middle wall through the oblique reinforcing steel bars 3 to form an annular communicating body.
Furthermore, the grounding device further comprises a lead-out connecting terminal 7, the lead-out connecting terminal 7 is arranged in the side wall cable trench and the middle wall cable gallery, and the lead-out connecting terminal 7 is fixedly connected with the vertical steel bars 6 through cross welding.
According to the invention, the annular grounding devices are arranged at intervals of 20-25 m in the longitudinal direction of the steel reinforcement framework, the grounding devices strictly forbid insufficient welding to structural steel reinforcement welding points, so that the comprehensive grounding effect is ensured, the leading-out connecting terminals 7 are arranged in the pipe trench or the pipe gallery, the comprehensive grounding measure of longitudinal connection in the tunnel is cancelled, and the comprehensive grounding effect is better.
The invention also discloses an installation method of the immersed tube tunnel grounding device, which arranges the grounding device on the steel reinforcement framework at intervals, and particularly comprises the following steps:
a bottom steel plate waterproof layer 1 is laid at the bottom of the immersed tube joint to ensure the durability of the immersed tube joint; welding and fixing the bottom steel plate waterproof layer 1 and the bottom steel plate anchor bars 2 together; the circumferential reinforcing steel bar 4 of the bottom plate and at least two bottom steel plate anchor bars 2 are fixedly connected together through welding (preferably, at least two cross welding points 5 are included).
Welding and fixing the annular reinforcing steel bars 4 of the bottom plate with the vertical reinforcing steel bars 6 of the side wall and the middle wall through the inclined reinforcing steel bars 3 to form an annular communicating body; lead-out connecting terminals 7 are arranged in the cable galleries of the side wall cable trench and the middle wall, and the lead-out connecting terminals 7 are welded with the vertical steel bars 6 of the side wall and the middle wall in a cross mode.
Further, every 20 ~ 25m of interval sets up the annular ground connection of a department in the longitudinal direction of immersed tube coupling, and the earth system is to the strict rosin joint of prohibiting of structural steel bar welding point.
The comprehensive grounding device and the mounting method for the immersed tube tunnel are suitable for direct grounding of a long immersed tube tunnel; the longitudinal connection measure of the steel bars and the bolts in the immersed tube joints is cancelled, so that the comprehensive grounding effect is good; the bottom steel plate waterproof layer is adopted as the pipe joint comprehensive grounding body, the pipe joint is prefabricated in a factory, and the construction quality is guaranteed; the construction process is simple and the engineering investment is low.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
Claims (6)
1. The utility model provides a grounding device is synthesized in immersed tube tunnel which characterized in that, the grounding device interval sets up on steel reinforcement framework, includes:
a bottom steel plate waterproof layer (1);
the bottom steel plate anchor bars (2) are fixedly connected with the bottom steel plate waterproof layer (1);
the bottom plate circumferential reinforcing steel bars (4) are fixedly connected with the two bottom steel plate anchor bars (2) at least through welding.
2. The comprehensive grounding device for the immersed tube tunnel according to claim 1, wherein the grounding device is arranged at a spacing distance of 20-25 m in the longitudinal direction of the steel reinforcement framework.
3. The immersed tube tunnel integrated grounding device according to claim 2, wherein the bottom plate circumferential reinforcing steel bars (4) are fixedly connected with the vertical reinforcing steel bars (6) in the side walls and the middle wall through the oblique reinforcing steel bars (3) by welding.
4. The immersed tunnel comprehensive grounding device according to claim 3, wherein the grounding device further comprises a lead-out connecting terminal (7), the lead-out connecting terminal (7) is arranged in the side wall cable trench and the middle wall cable gallery, and the lead-out connecting terminal (7) is fixedly connected with the vertical steel bars (6).
5. The method for installing the comprehensive grounding device of the immersed tube tunnel is characterized in that the grounding device is arranged on a steel reinforcement framework at intervals, and comprises the following steps:
a bottom steel plate waterproof layer (1) is arranged at the bottom of the immersed tube joint;
fixedly connecting the bottom steel plate waterproof layer (1) with the bottom steel plate anchor bars (2);
fixedly connecting a bottom plate circumferential reinforcing steel bar (4) with at least two bottom steel plate anchor bars (2) together by welding;
fixedly connecting the annular reinforcing steel bars (4) of the bottom plate with the vertical reinforcing steel bars (6) through the oblique reinforcing steel bars (3);
and arranging grounding devices at intervals of 20-25 m in the longitudinal direction of the immersed tube joint.
6. The method for installing the comprehensive grounding device of the immersed tube tunnel according to claim 5, wherein the lead-out connection terminals (7) are arranged in the side wall cable trench and the middle wall cable gallery, and the lead-out connection terminals (7) are cross-welded with the vertical steel bars (6) of the side wall and the middle wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911315496.0A CN111058478A (en) | 2019-12-19 | 2019-12-19 | Immersed tube tunnel comprehensive grounding device and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911315496.0A CN111058478A (en) | 2019-12-19 | 2019-12-19 | Immersed tube tunnel comprehensive grounding device and mounting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111058478A true CN111058478A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911315496.0A Pending CN111058478A (en) | 2019-12-19 | 2019-12-19 | Immersed tube tunnel comprehensive grounding device and mounting method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205189896U (en) * | 2015-12-10 | 2016-04-27 | 中铁二十局集团第二工程有限公司 | Tunnel secondary lining prevents flashover ground structure |
| CN205206837U (en) * | 2015-11-25 | 2016-05-04 | 铁道第三勘察设计院集团有限公司 | Supporting type of construction of railway shield tunnel integrated ground |
| CN205532624U (en) * | 2016-03-30 | 2016-08-31 | 中铁工程装备集团有限公司 | Ground system is synthesized in reinforced concrete pipe piece tunnel |
| CN106638689A (en) * | 2017-01-11 | 2017-05-10 | 中铁隧道勘测设计院有限公司 | Immersed tunnel bottom plate with ribbed beams and drainage structure |
| CN107387118A (en) * | 2017-07-17 | 2017-11-24 | 中铁隧道勘测设计院有限公司 | A kind of shield tunnel earthing or grounding means and its construction method |
-
2019
- 2019-12-19 CN CN201911315496.0A patent/CN111058478A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205206837U (en) * | 2015-11-25 | 2016-05-04 | 铁道第三勘察设计院集团有限公司 | Supporting type of construction of railway shield tunnel integrated ground |
| CN205189896U (en) * | 2015-12-10 | 2016-04-27 | 中铁二十局集团第二工程有限公司 | Tunnel secondary lining prevents flashover ground structure |
| CN205532624U (en) * | 2016-03-30 | 2016-08-31 | 中铁工程装备集团有限公司 | Ground system is synthesized in reinforced concrete pipe piece tunnel |
| CN106638689A (en) * | 2017-01-11 | 2017-05-10 | 中铁隧道勘测设计院有限公司 | Immersed tunnel bottom plate with ribbed beams and drainage structure |
| CN107387118A (en) * | 2017-07-17 | 2017-11-24 | 中铁隧道勘测设计院有限公司 | A kind of shield tunnel earthing or grounding means and its construction method |
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Application publication date: 20200424 |