CN108755750B - Drag reduction method for movable support shield for building urban pipe gallery - Google Patents
Drag reduction method for movable support shield for building urban pipe gallery Download PDFInfo
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- CN108755750B CN108755750B CN201810311434.1A CN201810311434A CN108755750B CN 108755750 B CN108755750 B CN 108755750B CN 201810311434 A CN201810311434 A CN 201810311434A CN 108755750 B CN108755750 B CN 108755750B
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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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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a resistance reduction method of a movable support shield for building an urban pipe gallery, wherein the movable support shield comprises a plurality of shield units which are sequentially arranged, each shield unit comprises a shield wall arranged on two side walls of a pipe gallery tunnel and a guard plate arranged on the outer vertical surface of the shield wall, two adjacent shield units can move relative to each other in the tunneling direction of the pipe gallery tunnel, the guard plates of the two adjacent shield units are always in staggered lap joint with each other in the moving process of the shield units, and the resistance reduction method comprises the following steps: and filling slurry between the protective plate and the side wall of the pipe gallery. The invention can form the support of the pipe gallery and the gallery without pouring the retaining wall pile.
Description
Technical Field
The invention relates to the field of construction engineering, in particular to a drag reduction method for a movable support shield for building an urban pipe gallery.
Background
The piping lane is used for laying the public tunnel of municipal administration pipelines such as electric power, communication, broadcasting and TV, plumbing, heating power, gas in the underground concentratedly.
At present, in the construction of a pipe gallery, retaining wall piles are basically poured at two sides of a pipe gallery to carry out temporary support, a middle soil body is excavated under the protection of the retaining wall piles, a working space for prefabricating and assembling a structure or carrying out cast-in-place is formed, and the pouring construction of a city pipe gallery structure is carried out. The distance is 3 meters, the average depth is 12 meters, each kilometer needs 7200 meters of retaining wall piles, each meter is 1600 yuan per meter, and the temporary support engineering cost required for each kilometer of urban pipe gallery structures reaches 1200 ten thousand.
High temporary support engineering cost increases the construction investment of pipe gallery construction engineering, and urban road traffic can be cut off by adopting a construction organization mode of comprehensive excavation, so that traffic must be dredged and shunted during construction, the travel and normal life of residents are seriously disturbed, and the urban road traffic is disordered. And after the pipe gallery is built, the retaining wall piles remained underground leave troubles for the subsequent re-development and utilization of the urban underground space.
Disclosure of Invention
The invention mainly solves the technical problem of providing a movable support shield for building an urban pipe gallery, which can form support of a pipe gallery and an underground tunnel without pouring a retaining wall pile.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a portable shield of strutting for city piping lane is built, portable shield of strutting includes a plurality of shield units that set gradually, the shield unit is including setting up the shield wall at pipe gallery both sides wall and locating the backplate of the outer facade of shield wall, two adjacent shield units can be in the direction of tunnelling of pipe gallery relative movement each other, just the backplate of two adjacent shield units is crisscross overlap joint each other all the time at shield unit removal in-process, the drag reduction method includes following step: and filling slurry between the protective plate and the side wall of the pipe gallery.
Preferably, the step of filling slurry between the guard plate and the side wall of the pipe gallery includes: filling clay between the guard plate and the side wall of the pipe gallery; and spraying high-pressure water to the clay through a nozzle arranged on the surface of the protective plate facing the clay so as to liquefy the clay into slurry and further form a liquefied clay interface.
Preferably, the step of filling the slurry between the guard plate and the side wall of the pipe gallery further comprises: and spraying high-pressure air flow to the clay through air nozzles arranged on the surface of the protective plate facing the clay while spraying high-pressure water, so that an air film is formed between the protective plate and the clay.
Preferably, the step of filling the slurry between the guard plate and the side wall of the pipe gallery further comprises: and controlling a vibration source arranged on the surface of the protective plate, which is opposite to the clay, to vibrate while spraying high-pressure water, so that the excitation force of the vibration source promotes the liquefaction of the clay and the fluidity of the slurry is increased.
The invention has the beneficial effects that: different from the situation of the prior art, the invention has a plurality of shield units which are arranged in sequence, two adjacent shield units comprise guard plates with shield walls arranged on the outer vertical surfaces of the shield walls, the guard plates of the two adjacent shield units are always in staggered lap joint with each other in the moving process of the shield units, and slurry is filled between the guard plates and the side walls of the pipe gallery, so that the slurry can reduce the friction resistance between the guard plates and the side walls of the pipe gallery, and favorable conditions are created for the movement, maintenance and disassembly of the shield units.
Drawings
Fig. 1 is a schematic view of an application scenario of the drag reduction method for a mobile support shield for urban pipe gallery construction according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, which is an application scene diagram of a drag reduction method of a mobile support shield for building an urban pipe gallery according to an embodiment of the present invention, fig. 1 is a schematic top view of the application scene, the mobile support shield includes a plurality of sequentially arranged shield units 1, the shield units 1 include shield walls 11 arranged on two side walls of the pipe gallery and guard plates 12 arranged on the outer vertical surfaces of the shield walls 11, the outer vertical surfaces of the shield walls 11 are surfaces facing the side walls of the pipe gallery, two adjacent shield units 1 move relative to each other in the tunneling direction of the pipe gallery, and the guard plates 12 of two adjacent shield units 1 are always overlapped in a staggered manner in the moving process of the shield units 1. In the present embodiment, the moving direction (i.e., the heading direction) of the shield unit 1 is as indicated by an arrow in fig. 1.
The drag reduction method of the embodiment comprises the following steps: and filling slurry between the protective plate and the side wall of the pipe gallery.
The portable shield of strutting of this embodiment is when the construction is built to the pipe gallery, and a plurality of shield units 1 that set gradually place in the pipe gallery, because at the initial stage of placing shield unit 1, the pipe gallery is not strutted the protection, consequently can excavate a section of soil earlier, puts into back formation with a shield unit 1 and struts the back, excavates a section of soil body forward again, then with next shield unit 1. Thus, according to this flow, a plurality of shield units 1 are finally put in for supporting, and the number of the shield units 1 is three, for example.
After the plurality of shield units 1 form support, cast-in-place or assembly operation of the pipe gallery structure is completed in a support space formed by the third shield unit 1. After the operation of the pipe gallery structure is finished, after a section soil body with a preset length in front of the first shield unit 1 is excavated, the first shield unit 1 moves forwards, and the moving distance needs to ensure that the guard plates 12 of the first shield unit 1 and the guard plates 12 of the second shield unit 1 are always in staggered lap joint with each other. Then the second shield unit 1 is also moved forward and finally the third shield unit 1 is also moved forward after the second shield unit 1 has been moved. After removing many times for the pipe gallery structure thing that has accomplished exposes, carries out operations such as waterproof layer construction and backfill to the pipe gallery structure thing that has accomplished again, so that resume urban road.
Because construction operation is required in the supporting space formed by the shield unit 1, the guard plate 12 can prevent muddy water on the side wall of the tunnel from entering the supporting space to influence the construction. In actual construction, the side wall of the tunnel is not an absolute horizontal plane, and the adjacent shield units 1 may be extruded by the side wall of the tunnel to generate deviation transverse to the moving direction (i.e. the tunneling direction) in the moving process, so that the guard plates 12 deform or break, and after the drag reduction method of the invention is adopted, slurry is filled between the guard plates 12 and the side wall of the pipe gallery tunnel, i.e. the guard plates 12 are in contact with the slurry, when the shield units 1 move, the friction resistance between the guard plates 12 and the slurry is greatly reduced, and when the shield units 1 need to lift and separate from the pipe gallery tunnel, the friction resistance between the guard plates 12 and the slurry is also greatly reduced, so that the energy consumed when the movable support shield moves, is removed, and is lifted and separated from the tunnel can be saved, and the functions of protecting the whole structure of the movable support shield and saving energy are achieved.
The slurry filling means may be varied, for example, by pouring the slurry ready for use directly between the shroud and the side wall of the pipe gallery, or by creating the slurry on site. This embodiment is preferred to make the slurry on site.
Specifically, the step of filling the slurry between the protector plate 12 and the side wall of the pipe gallery includes: filling clay between the guard plate 12 and the side wall of the pipe gallery; high-pressure water is sprayed to the clay through a nozzle provided on the surface of the sheathing board 12 facing the clay, so that the clay is liquefied into slurry, thereby forming a liquefied clay interface.
Since the guard plates 12 of each shield unit 1 are overlapped in a staggered manner, an almost closed space is formed between the guard plates 12 of each shield unit 1 and the side wall of the pipe gallery, and after clay is filled between the guard plates 12 and the side wall of the pipe gallery, the clay can be liquefied into slurry by spraying high-pressure water to the clay, so that a liquefied clay interface is formed between the slurry and the guard plates 12.
Further, the step of filling the slurry between the shield 12 and the side wall of the pipe gallery channel further comprises: high-pressure air is sprayed to the clay through air nozzles provided on the surface of the protector plate 12 facing the clay while spraying high-pressure water, so that an air film is formed between the protector plate 12 and the clay. The air film isolates the shield 12 from the slurry, which may further increase the frictional resistance of the shield 12 to the slurry.
In other embodiments, the step of filling the slurry between the fender 12 and the side wall of the pipe gallery excavation further comprises: while spraying high-pressure water, the vibration source arranged on the surface of the protective plate 12 opposite to the clay is controlled to vibrate, so that the excitation force of the vibration source promotes the liquefaction of the clay and increases the fluidity of the slurry. Wherein, the excitation force of the vibration source can promote the liquefaction of the clay under the action of high-pressure water, and the solidification of the slurry can be retarded after the fluidity of the slurry is improved.
It should be noted that the processes of injecting the high-pressure air flow and controlling the vibration source to vibrate in the embodiment of the present invention may be performed together.
Through the mode, the drag reduction method of the movable supporting shield can reduce the frictional resistance between the guard plate and the side wall of the pipe gallery through filling the mud between the guard plate and the side wall of the pipe gallery, and creates favorable conditions for the movement, maintenance and disassembly of the shield unit.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. The utility model provides a drag reduction method that is used for portable shield of strutting of city piping lane construction, its characterized in that, portable shield of strutting includes a plurality of shield units that set gradually, the shield unit is including setting up the shield wall at pipe gallery both sides wall and locating the backplate of the outer facade of shield wall, two adjacent shield units can be in the direction of tunnelling of pipe gallery relative movement each other, just the backplate of two adjacent shield units is crisscross the overlap joint each other all the time in shield unit removal process, the drag reduction method includes following step:
filling slurry between the guard plate and the side wall of the pipe gallery;
wherein, the process of placing of a plurality of shield units does: in the initial stage of placing the shield units, firstly, excavating a section of soil body, placing one shield unit into the shield units to form support, then excavating a section of soil body forwards, then placing the next shield unit into the shield units, and finally placing a plurality of shield units into the shield units to support according to the flow.
2. Drag reduction method according to claim 1, characterized in that said step of filling mud between said shield and the side wall of the pipe gallery comprises in particular:
filling clay between the guard plate and the side wall of the pipe gallery;
and spraying high-pressure water to the clay through a nozzle arranged on the surface of the protective plate facing the clay so as to liquefy the clay into slurry and further form a liquefied clay interface.
3. The drag reduction method of claim 2, where said step of filling a slurry between said shroud and a sidewall of a pipe gallery excavation further comprises:
and spraying high-pressure air flow to the clay through air nozzles arranged on the surface of the protective plate facing the clay while spraying high-pressure water, so that an air film is formed between the protective plate and the clay.
4. Drag reduction method according to claim 2 or 3, characterized in that the step of filling mud between the shield and the side wall of the pipe gallery excavation further comprises:
and controlling a vibration source arranged on the surface of the protective plate, which is opposite to the clay, to vibrate while spraying high-pressure water, so that the excitation force of the vibration source promotes the liquefaction of the clay and the fluidity of the slurry is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311434.1A CN108755750B (en) | 2018-04-09 | 2018-04-09 | Drag reduction method for movable support shield for building urban pipe gallery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311434.1A CN108755750B (en) | 2018-04-09 | 2018-04-09 | Drag reduction method for movable support shield for building urban pipe gallery |
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| Publication Number | Publication Date |
|---|---|
| CN108755750A CN108755750A (en) | 2018-11-06 |
| CN108755750B true CN108755750B (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810311434.1A Active CN108755750B (en) | 2018-04-09 | 2018-04-09 | Drag reduction method for movable support shield for building urban pipe gallery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111622775A (en) * | 2020-06-08 | 2020-09-04 | 北京市轨道交通建设管理有限公司 | Hydraulic cutting resistance-reducing pre-supporting device and hydraulic cutting system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1136332A (en) * | 1997-07-23 | 1999-02-09 | Taisei Corp | Underground structure and construction thereof |
| CN105888677A (en) * | 2016-05-09 | 2016-08-24 | 江苏鸿基节能新技术股份有限公司 | Underground pipe gallery construction device, combination and construction method |
| CN106049532A (en) * | 2016-07-25 | 2016-10-26 | 中铁工程装备集团有限公司 | Supporting and retaining device for open excavation construction of comprehensive pipe gallery and construction method thereof |
| CN106522272A (en) * | 2016-07-28 | 2017-03-22 | 江苏开来预应力工程有限公司 | Design and construction method of underground pipe rack based on plate with adhesive prestress on cross section |
| CN206337580U (en) * | 2016-12-02 | 2017-07-18 | 河北卓邦建设工程有限公司 | A kind of municipal underground pipeline lane |
-
2018
- 2018-04-09 CN CN201810311434.1A patent/CN108755750B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1136332A (en) * | 1997-07-23 | 1999-02-09 | Taisei Corp | Underground structure and construction thereof |
| CN105888677A (en) * | 2016-05-09 | 2016-08-24 | 江苏鸿基节能新技术股份有限公司 | Underground pipe gallery construction device, combination and construction method |
| CN106049532A (en) * | 2016-07-25 | 2016-10-26 | 中铁工程装备集团有限公司 | Supporting and retaining device for open excavation construction of comprehensive pipe gallery and construction method thereof |
| CN106522272A (en) * | 2016-07-28 | 2017-03-22 | 江苏开来预应力工程有限公司 | Design and construction method of underground pipe rack based on plate with adhesive prestress on cross section |
| CN206337580U (en) * | 2016-12-02 | 2017-07-18 | 河北卓邦建设工程有限公司 | A kind of municipal underground pipeline lane |
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| CN108755750A (en) | 2018-11-06 |
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