CN103122642B - Construction method of vertical post support change - Google Patents
Construction method of vertical post support change Download PDFInfo
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- CN103122642B CN103122642B CN201310035279.2A CN201310035279A CN103122642B CN 103122642 B CN103122642 B CN 103122642B CN 201310035279 A CN201310035279 A CN 201310035279A CN 103122642 B CN103122642 B CN 103122642B
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Abstract
The invention particularly relates to a construction method of vertical post support change. The construction method of the vertical post support change is adopted in a dry dock foundation pit supporting structure used for prefabricating immersed tube joints. An underground diaphragm wall shaped like a Chinese charter 'ji' is adopted as a supporting structure of a dry dock foundation pit, a horizontal supporting body is arranged on the top of the underground diaphragm wall shaped like the Chinese charter 'ji', a vertical latticed column is arranged in the middle of the horizontal supporting body, and after an immersed tube joint is fabricated, a vertical post support change body is arranged on the top of the immersed tube joint, and the portion of the vertical latticed column, above a dry dock foundation pit base board, is cut off. After the dry dock foundation pit is filled with water and the water level meets the floating water level of the immersed tube joint, the horizontal supporting body and the vertical post support change body are removed, and now pressure generated by water on the diaphragm wall is utilized to replace supporting force of the removed horizontal supporting body. The construction method of the vertical post support change has the advantages of reducing the mass size of underground diaphragm wall construction members, reducing construction cost and effectively controlling occupied area of the underground diaphragm wall, and meanwhile the construction method of the vertical post support change does not influence construction quality of the immersed tube joints and floating undock.
Description
Technical field
The invention belongs to immersed tube tunnel construction field, be specifically related to a kind of construction method of the vertical pillar support replacement adopting for the dry-docking foundation pit supporting construction of prefabricated immersed tube tube coupling.
Background technology
Submerged tunnel has become the important node engineering of means of transportation planning network, has built nearly hundreds of Underwater Traffic Tunnels all over the world, and wherein more than 100 tunnel employing immersed tube engineering method built and formed.In immersed tube tunnel is built, its dry-docking, pipeline section, foundation trench, pipeline section basis etc., are all main the work itemss of immersed tube tunnel.And dry-docking bearing immersed tube tube coupling prefabricated with floating task, the effect in immersed tube tunnel holds the balance.
In narrow field situation, the dry-docking common method of constructing is as follows: cantilevered " Π " type or lattice diaphragm wall are set, for considering that immersed tube tube coupling floating undocks, generally do not establish horizontal support.The method is made by immersed tube tube coupling and floating is undocked more for convenience, but cantilevered " Π " type or lattice diaphragm wall are larger for meeting the required cross section of the outer Water And Earth Pressures of carrying foundation ditch, cause the enclosure wall scale of construction excessive, and dry-docking cost is higher, and floor space increases.
Summary of the invention
The object of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of construction method of vertical pillar support replacement is provided, this construction method is by arranging horizontal support on the diaphragm wall at dry-docking foundation ditch, and be successively used as its braced structures by vertical lattice column and vertical pillar support replacement, to reach the cross section and the scale of construction bulk that reduce Diaphragm Wall Support Structure.
The object of the invention realizes and being completed by following technical scheme:
A kind of construction method of vertical pillar support replacement, the immersed tube tube coupling that relates to dry-docking foundation ditch, build in described dry-docking foundation ditch and as " Π " type diaphragm wall of described dry-docking foundation pit supporting construction, it is characterized in that described construction method at least comprises the steps:, at described " Π " type diaphragm wall top, horizontal support is set, at the middle part near described horizontal support, vertical lattice column is set, the bottom of described vertical lattice column is deeply to the described dry-docking foundation ditch bottom soil body, in order to the temporary support structure as described horizontal support; Make described immersed tube tube coupling; Vertical pillar support replacement is set at the top of described immersed tube tube coupling afterwards, and the both ends difference support and connection of described vertical pillar support replacement are in described horizontal support and described immersed tube tube coupling, in order to the vertical supporting structure as described horizontal support; Cut off afterwards described vertical lattice column and be positioned at the above part of described dry-docking base plate of foundation pit; In described immersed tube tube coupling, water tank is set and the ballast that adds water, opens the dock entrance of described dry-docking foundation ditch to pour water in described dry-docking foundation ditch; When water level reaches floating absolute altitude in described dry-docking foundation ditch, remove described horizontal support and vertical pillar support replacement, the water body described in pump drainage in water tank, makes described immersed tube tube coupling floating.
Described support and connection are: at the Support Position place of described horizontal support embedded bar cage, described reinforcing cage evagination is in the soffit of described horizontal support; In a casing, default reinforcing cage, is arranged at described support and connection place by described casing afterwards; Connect described embedded bar cage and default reinforcing cage, finally complete the perfusion slip casting of reinforcing cage, to form the described support and connection of described vertical pillar support replacement.
Described vertical pillar support replacement bottom is provided with and expands basis, and described expansion between basis and the top board of described immersed tube tube coupling, a separation layer is set.
Described vertical pillar support replacement is a steel member, and its bottom is by adopting bolt to be connected with the top of described immersed tube tube coupling, and its top is by adopting anchor ear to be connected with described horizontal support.
Advantage of the present invention is, by horizontal support being set on the diaphragm wall at dry-docking foundation ditch, and be successively used as its braced structures by vertical lattice column and vertical pillar support replacement, reduce diaphragm wall member scale of construction size, both reduce construction costs and effectively controlled the occupation of land scope of diaphragm wall, construction quality to immersed tube tube coupling and floating are undocked and are had no effect again, are specially adapted to build under narrow field condition dry-docking foundation ditch.
Brief description of the drawings
Fig. 1 is the schematic diagram that construction sequence one in the present invention arranges horizontal support and vertical lattice column;
Fig. 2 is the construction sequence two, three in the present invention arranges vertical pillar support replacement schematic diagram at immersed tube tube coupling top;
Fig. 3 is the schematic diagram that construction sequence four in the present invention cuts off vertical lattice column;
Fig. 4 is the schematic diagram that construction sequence five in the present invention arranges water tank in immersed tube tube coupling;
Fig. 5 is that the construction sequence five in the present invention is the schematic diagram of pouring water in dry-docking foundation ditch after the first ballast that adds water in water tank;
Fig. 6 is the schematic diagram that construction sequence six in the present invention removes horizontal support and vertical pillar support replacement;
Fig. 7 is that in the present invention, construction sequence six is that the interior water body of pump drainage water tank is so that the schematic diagram of immersed tube tube coupling floating;
Fig. 8 is the partial enlarged drawing B of vertical pillar support replacement in the present invention;
Fig. 9 is " Π " type diaphragm wall plan view A-A in the present invention.
Detailed description of the invention
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Fig. 1-9, in figure, mark 1-7 is respectively: horizontal support 1, reinforcing cage 1-1, the hole 1-2 that vibrates, diaphragm wall 2, vertical lattice column 3, vertical lattice column pile foundation 3-1, immersed tube tube coupling 4, reserving hole 4-1, vertical pillar support replacement 5, casing 5-1, reinforcing cage 5-2, expand basic 5-3, water tank 6, separation layer 7.
Embodiment mono-: the present embodiment relates to the construction method that adopts vertical pillar support replacement in a kind of immersed tube tunnel dry-docking foundation ditch, by adopting horizontal support and the vertical upright column support replacement support unit as dry-docking foundation ditch, the scale of construction size and the construction costs that reduce supporting and protection structure (being diaphragm wall) in dry-docking foundation ditch, this construction method comprises the steps:
1. as shown in Fig. 1,8 and 9, " Π " type diaphragm wall 2 is set in dry-docking foundation ditch, be provided with horizontal support 1 at the top of diaphragm wall 2, this horizontal support 1 is in order to provide side direction to prop up a grade power to diaphragm wall 2, at the region near the mid-point on central axis of horizontal support 1, a vertical lattice column 3 is set simultaneously, the bottom of vertical lattice column 3 deeply (is vertical lattice column pile foundation 3-1) to the bottom soil body of dry-docking foundation ditch, and this vertical lattice column 3 is in order to the temporary support structure as horizontal support 1; Wherein be embedded with reinforcing cage 1-1 in support and connection place of horizontal support 1, reinforcing cage 1-1 evagination is in the soffit of horizontal support 1, and heart place is reserved with the hole 1-2 that vibrates for disturbing concrete slurry therein;
2. as shown in Figure 1, make afterwards immersed tube tube coupling 4, and on its base plate, reserving hole 4-1 is set, run through and pass through for vertical lattice column 3;
3. as shown in Fig. 2 and 8, on the top board of immersed tube tube coupling 4, apply the vertical pillar support replacement 5 of steel bar concrete, applying step is: default reinforcing cage 5-2 in a circular casing 5-1, afterwards the top of circular casing 5-1 is docked with the reinforcing cage 1-1 in horizontal support 1, be provided with in the bottom of circular casing 5-1 and expand basic 5-3, between immersed tube tube coupling 4 top boards and the basic 5-3 of expansion, separation layer is set simultaneously, thereafter by the reserved hole 1-2 that vibrates in horizontal support 1 to concrete perfusion slurry in circular casing, to form the vertical pillar support replacement 5 of above-mentioned steel bar concrete;
4. as shown in Figure 3,, after the intensity maintenance for the treatment of vertical pillar support replacement 5 reaches requirement, the first half of cutting off vertical lattice column 3, cuts off the part being positioned at more than dry-docking base plate of foundation pit, only retains it and is positioned at the vertical lattice column pile foundation 3-1 below the soil body; Clear up afterwards and recover dry-docking foundation ditch basis and base plate, then the reserving hole 4-1 on assembling reinforcement concrete perfusion packing immersed tube tube coupling 4 base plates;
5. as shown in Figure 4,5, in the interior both sides of immersed tube tube coupling 4, water tank 6 ballast that adds water are set, open thereafter the dock entrance of dry-docking foundation ditch to pour water in dry-docking foundation ditch;
6. as shown in Figure 6,7, when water level in dry-docking foundation ditch reaches the floating absolute altitude of immersed tube tube coupling 4, remove horizontal support 1 and support 1 vertical pillar support replacement 5 for support level, now utilize the pressure that water body produces diaphragm wall 2 to replace the shelves power of the horizontal support 1 of removing to diaphragm wall 2, the interior water body of pump drainage water tank 6 afterwards, makes in dry-docking foundation ditch operating mode meet the immersed tube tube coupling 4 floatings execution conditions such as undock.
Embodiment bis-: in the present embodiment, the concrete construction method of vertical pillar support replacement is identical with embodiment mono-, but vertical pillar support replacement 5 adopts steel member in the present embodiment, its underpart is by adopting bolt to be connected with immersed tube tube coupling 4 top boards, its top is by adopting steel hoop to be connected with horizontal support 1, adopt bolt and these two kinds of connectors of steel hoop can be beneficial to rapid construction, avoid adopting reinforced concrete structure to have the shortcoming of curing time in embodiment mono-, this vertical pillar support replacement 5 is removed after can pouring water in dry-docking foundation ditch.
Claims (4)
1. the construction method of a vertical pillar support replacement, the immersed tube tube coupling that relates to dry-docking foundation ditch, build in described dry-docking foundation ditch and as " Π " type diaphragm wall of described dry-docking foundation pit supporting construction, it is characterized in that described construction method at least comprises the steps:, at described " Π " type diaphragm wall top, horizontal support is set, at the middle part near described horizontal support, vertical lattice column is set, the bottom of described vertical lattice column is deeply to the described dry-docking foundation ditch bottom soil body, in order to the temporary support structure as described horizontal support; Make described immersed tube tube coupling; Vertical pillar support replacement is set at the top of described immersed tube tube coupling afterwards, and the both ends difference support and connection of described vertical pillar support replacement are in described horizontal support and described immersed tube tube coupling, in order to the vertical supporting structure as described horizontal support; Cut off afterwards described vertical lattice column and be positioned at the above part of described dry-docking base plate of foundation pit; In described immersed tube tube coupling, water tank is set and the ballast that adds water, opens the dock entrance of described dry-docking foundation ditch to pour water in described dry-docking foundation ditch; When water level reaches floating absolute altitude in described dry-docking foundation ditch, remove described horizontal support and vertical pillar support replacement, the water body described in pump drainage in water tank, makes described immersed tube tube coupling floating.
2. the construction method of a kind of vertical pillar support replacement according to claim 1, is characterized in that described support and connection are: at the Support Position place of described horizontal support embedded bar cage, described reinforcing cage evagination is in the soffit of described horizontal support; In a casing, default reinforcing cage, is arranged at described support and connection place by described casing afterwards; Connect described embedded bar cage and default reinforcing cage, finally complete the perfusion slip casting of reinforcing cage, to form the described support and connection of described vertical pillar support replacement.
3. the construction method of a kind of vertical pillar support replacement according to claim 1, is characterized in that described vertical pillar support replacement bottom is provided with expansion basis, and described expansion between basis and the top board of described immersed tube tube coupling, a separation layer is set.
4. the construction method of a kind of vertical pillar support replacement according to claim 1, it is characterized in that described vertical pillar support replacement is a steel member, its bottom is by adopting bolt to be connected with the top of described immersed tube tube coupling, and its top is by adopting anchor ear to be connected with described horizontal support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310035279.2A CN103122642B (en) | 2013-01-30 | 2013-01-30 | Construction method of vertical post support change |
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| CN201310035279.2A CN103122642B (en) | 2013-01-30 | 2013-01-30 | Construction method of vertical post support change |
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| CN103122642B true CN103122642B (en) | 2014-10-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134250B (en) * | 2015-10-16 | 2017-06-20 | 中铁十局集团第一工程有限公司 | Exempt to tear the method for supporting direct lining cutting open in a kind of weak surrounding rock subway station |
| CN108457300B (en) * | 2018-01-19 | 2021-01-22 | 中国建筑第八工程局有限公司 | Construction method for replacing support of underground large-span structure by cover-excavation method |
| CN111236250A (en) * | 2020-01-17 | 2020-06-05 | 中铁第六勘察设计院集团有限公司 | Method for quickly removing foundation pit support at onshore section joint of immersed tube tunnel |
| CN111206585A (en) * | 2020-02-24 | 2020-05-29 | 中铁第六勘察设计院集团有限公司 | A structural system for prefabricated modular transportation of large-scale immersed tunnel sections on flat ground |
| CN112609701B (en) * | 2020-11-30 | 2022-12-02 | 中国建筑第八工程局有限公司 | Method for dismantling inner support of deep foundation pit |
| CN114837226A (en) * | 2022-05-06 | 2022-08-02 | 中铁第六勘察设计院集团有限公司 | Dry dock arrangement method based on immersed tunnel passing through Jiangxian continents |
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| RU2114251C1 (en) * | 1995-07-12 | 1998-06-27 | Акционерное общество закрытого типа - Нефтегазогорная компания "Нефтегазгор" | Method for driving underwater mine working or tunnel |
| JPH11323977A (en) * | 1998-05-18 | 1999-11-26 | Taisei Corp | Waterproof structure of underwater tunnel |
| CN1696415A (en) * | 2004-05-12 | 2005-11-16 | 布伊古公共工程公司 | Process and apparatus for producing an immersed tunnel on subsea ground |
| CN1884723A (en) * | 2006-06-12 | 2006-12-27 | 中铁隧道勘测设计院有限公司 | Construction method for prefabricating immersed tube tunnel tubulation adopting mobile dry dock |
| CN102345299A (en) * | 2011-11-11 | 2012-02-08 | 上海市隧道工程轨道交通设计研究院 | Reusable fabricated end seal method for immersed tube tunnel |
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2013
- 2013-01-30 CN CN201310035279.2A patent/CN103122642B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2114251C1 (en) * | 1995-07-12 | 1998-06-27 | Акционерное общество закрытого типа - Нефтегазогорная компания "Нефтегазгор" | Method for driving underwater mine working or tunnel |
| JPH11323977A (en) * | 1998-05-18 | 1999-11-26 | Taisei Corp | Waterproof structure of underwater tunnel |
| CN1696415A (en) * | 2004-05-12 | 2005-11-16 | 布伊古公共工程公司 | Process and apparatus for producing an immersed tunnel on subsea ground |
| CN1884723A (en) * | 2006-06-12 | 2006-12-27 | 中铁隧道勘测设计院有限公司 | Construction method for prefabricating immersed tube tunnel tubulation adopting mobile dry dock |
| CN102345299A (en) * | 2011-11-11 | 2012-02-08 | 上海市隧道工程轨道交通设计研究院 | Reusable fabricated end seal method for immersed tube tunnel |
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