CN104032742B - A kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper - Google Patents
A kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper Download PDFInfo
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- CN104032742B CN104032742B CN201410208760.1A CN201410208760A CN104032742B CN 104032742 B CN104032742 B CN 104032742B CN 201410208760 A CN201410208760 A CN 201410208760A CN 104032742 B CN104032742 B CN 104032742B
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Abstract
The invention discloses a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper, comprise the following steps: 1) above pile body, set up operating platform; 2) conduit support beam is installed; 3) on two conduit support beams, respectively conduit is installed; 4) respectively by two bottom hoppers and two tubes connection; 5) two top hoppers are risen respectively winch to directly over two bottom hoppers; 6) respectively to four hopper pumping of concrete; 7) bottom hopper starts blowing; 8) bottom hopper be discharged to two/for the moment, top hopper starts blowing; 9) lower portion hopper continues to pump into concrete, underwater concrete continous pouring, until terminate the underwater concrete construction of pile body.A kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper of the present invention, it adopts the method for the disposable continuous concrete of DLC four hopper, solves the quality problems of large area heavy in section pile body underwater concreting.
Description
[technical field]
The present invention relates to the pile foundation engineering field of civil engineering, be specifically related to a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper.
[background technology]
Save the area for building green city, some airports, chemical project, at Construction of The Mountainous Region, need to cut mountain and fill out ditch, and high roadbed engineering gets more and more, and massif wall-retaining structure is increasing, and the antislide pile for stability of slope is sincere aobvious important in geological hazard control.High roadbed retaining wall major constituents thing antislide pile section and the degree of depth increase thereupon, and the long continuous intensification of stake, brings new challenge to the concrete underwater grouting of pile body.Especially the difficulty of construction of rectangle heavy in section pile underwater concrete perfusion is large.
[summary of the invention]
The object of the invention is to the defect overcoming prior art, provide a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper, which solve the problem that large volume heavy in section pile body underwater grouting initial material filling amount is large, guarantee Rectangular Section Pile pile quality is intact, improve operating efficiency simultaneously.
For achieving the above object, the present invention adopts following technical scheme:
Based on a Placement of Underwater Concrete for Casting technique for DLC four hopper, comprise the following steps:
1) above pile body, set up operating platform with scaffold and four parallel i iron, its end face lays plank as work plane;
2) on adjacent two i iron, conduit support beam is installed respectively;
3) respectively conduit is installed by two conduit support beams;
4) respectively by two bottom hoppers by Flange joint to two conduit, simultaneously bottom valve is set respectively in the exit of two bottom hoppers;
5) by the main hook of crane two top hoppers are risen respectively and winch to directly over two bottom hoppers, in the exit of two top hoppers, upper valve is set respectively simultaneously, then by wire rope, bottom valve is connected with upper valve, and by wire rope, upper valve is connected with the auxiliary hook of crane, wire rope is all in relaxed state;
6) respectively to two bottom hoppers and two top hopper pumping of concrete to hopper top;
7) promote top hopper by the main hook of crane, until bottom valve departs from the exit of bottom hopper, bottom hopper starts blowing;
8) bottom hopper be discharged to two/for the moment, promote upper valve by the auxiliary hook of crane, until upper valve departs from the exit of top hopper, two top hoppers start blowing;
9) lower portion hopper continues to pump into concrete, underwater concrete continous pouring, until terminate the Placement of Underwater Concrete for Casting of pile body.
The present invention improves further and is, step 1) in, be also included in the idle area of the other choosing of pile body and dig detention tank.
The present invention improves further and is, step 5) in, and one end that wire rope is connected with upper valve (9) is provided with U-loop.
The present invention improves further and is, step 8) in, after two top hopper blowings are complete, hang out outside the venue.
The present invention improves further and is, the drop height of upper valve and bottom valve is no more than 2m.
The present invention improves further and is, the volume of bottom hopper and top hopper is 4.5m
3.
The present invention improves further and is, the internal diameter of conduit is 30cm.
The present invention improves further and is, the specification of i iron is 200mm × 102mm × 9mm.
The present invention improves further and is, the quantity of crane is 2, and its tonnage is 25T.
The present invention improves further and is, upper valve and bottom valve are stopper.
Compared with prior art, the present invention has following technique effect:
1, pile body cross section is divided into two by the present invention, installs conduit respectively at the center in two cross sections, shortens the distance of concrete flowing;
2, to pile body concrete placed under water time, four hoppers adopt vertically connects between two, reaches by controlling discharging time the requirement that the amount of concrete poured in the first batch meets conduit bottom buried depth;
3, the present invention adopts the method promoting top hopper to open bottom valve, solves the different open-interval problem of two vertical series connection hopper valves;
4, the present invention adopts the method for the disposable continuous concrete of DLC four hopper, solves the quality problems of large area heavy in section pile body underwater concreting.
[accompanying drawing explanation]
Fig. 1 is the flow chart of construction technology of the present invention;
Fig. 2 is conduit plane of arrangement schematic diagram of the present invention;
Fig. 3 (a) is the structural representation of bottom of the present invention hopper, and Fig. 3 (b) is the structural representation of bottom of the present invention valve;
Fig. 4 (a) is the structural representation of top of the present invention hopper, and Fig. 4 (b) is the structural representation of upper valve of the present invention;
Fig. 5 is construction overall schematic of the present invention.
[detailed description of the invention]
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
See Fig. 1 to Fig. 5, a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper of the present invention, comprises the following steps:
1) above pile body 2, set up operating platform 1 with scaffold and four parallel i iron 3, its end face lays plank as work plane, digs detention tank, as shown in Figure 2 in the idle area of the other choosing of pile body 2 simultaneously;
2) on adjacent two i iron 3, conduit support beam 4 is installed respectively, as shown in Figure 2;
3) respectively conduit 5 is installed by two conduit support beams 4, as shown in Figure 2;
4) respectively by two bottom hoppers 6 by Flange joint to two conduit 5, simultaneously at outlet 601 place of two bottom hoppers 6, bottom valve 7 is set respectively, as shown in Fig. 3 a, Fig. 3 b and Fig. 5;
5) by the main hook 10 of crane two top hoppers 8 are risen respectively and winch to directly over two bottom hoppers 6, upper valve 9 is set respectively at outlet 801 place of two top hoppers 8 simultaneously, then by wire rope, bottom valve 7 is connected with upper valve 9, and one end that wire rope is connected with upper valve 9 is provided with U-loop 701, and by wire rope, upper valve 9 is connected with the auxiliary hook 11 of crane, wire rope is all in relaxed state, as shown in Fig. 4 a, Fig. 4 b and Fig. 5;
6) respectively to two bottom hoppers 6 and two top hopper 8 pumping of concrete;
7) promote top hopper 8 by the main hook 10 of crane, until bottom valve 7 departs from outlet 601 place of bottom hopper 6, bottom hopper 6 starts blowing;
8) bottom hopper 6 be discharged to two/for the moment, promote upper valve 9 by the auxiliary hook 11 of crane, until upper valve 9 departs from outlet 801 place of top hopper 8, two top hoppers 8 start blowing, after two top hopper 8 blowings are complete, hang out outside the venue.；
9) lower portion hopper 6 continues to pump into concrete, underwater concrete continous pouring, until terminate the Placement of Underwater Concrete for Casting of pile body 2.
Wherein, the volume of bottom hopper 6 and top hopper 8 is 4.5m
3.The internal diameter of conduit 5 is 30cm.The specification of i iron 3 is 200mm × 102mm × 9mm.The quantity of crane is 2, and its tonnage is 25T.Upper valve 7 and bottom valve 9 are stopper.
It should be noted that, because antislide pile is close to riverbed, pile body bottom rock seepage water burst is serious, the darkest ponding 20m in stake holes, and pile body cross section is comparatively large, and after adopting draining, dry hole casting method is difficult to carry out and cannot ensures the concrete quality of pile body.Two secondary conduits are arranged in stake holes to this, utilizes four to fill concrete hopper, vertically connect between two, reach by the opening time interval controlling hopper valve the amount of concrete poured into continuously in the first batch and reach 18m
3, ensure the requirement of bottom depth of tremie more than 1m.Reaching reduction concreting total time by laying DLC, shortening the requirement of concrete horizontal flow distance.
In addition, it is to be noted that
If when 1, conduit 5 position of transferring and pile body reinforcing bar clash, the spacing of adjustable pile body reinforcing bar.When rebar spacing cannot adjust, suitably can adjust catheter position, avoid conduit and reinforcing bar mutually to disturb.
2, top hopper 8 and bottom hopper 6 remain on a vertical line, after upper valve 9 is opened, manually want timely steel pipe or rope to control top hopper 8 and keep basicly stable, prevent top hopper 8 from rotating, swing, offseting, cause concrete directly to be trickled down in stake holes.
3, slump will be stablized, and remains between 180mm-220mm, avoids material dry plug pipe, expects rare bleeding.Slump-loss was not more than 3cm in 1 hour.
4, upper valve 7 more than 2m, can not be emanated when preventing concrete from falling with bottom valve 9 drop height.
5, DLC builds normal rear basic 8min mono-tank (8m
3) concrete, 4-5 concrete tank should be equipped with, ensure concrete without interruption, avoid plugging phenomenon.
6, the C30 concrete initial setting time is 180min under water, can be extended to 480min after adding retarding agent.Concrete rate of flooding to be improved to this, before guaranteeing first batch of concrete initial set, complete whole filling concrete.
7, answer basic synchronization during two crane jobs, avoiding operating disunity four hopper can not blanking simultaneously.
8, fill with all facility of stake must check before construction, guarantee the continuity of pouring into.
Specific embodiment:
" Shaanxi Province prolongs Fu County can change flat project West, field stabilizing piles " constructed in August, 2012, " DLC four hopper " is adopted to pour into first phase 7 domatic antislide piles and 16, the second stage of exit or entrance of a clitch antislide pile altogether, pile body cross section is 3m × 4m, pile body bottom buried depth 16m ~ 32m, the darkest ponding 20m in hole, successfully overcomes the underwater grouting difficulty of large-section square pile body.Complete the perfusion of all snags in by the end of June, 2013, after testing, pile body structural integrity, classification of pile integrity is the stake of I class.
Construction technology applicable cases list
In sum, " DLC four hopper " construction technology improves construction speed to a great extent, has saved the duration of more than 60 days, has fulfiled the interim task object that owner assigns ahead of schedule, exempts economic penalties 100000 yuan.Machinery shortening standby time simultaneously, saves rental charge 120000 yuan; Save more than labour 300 work day, be roughly equal to more than 60000 yuan; Blending station production efficiency improves greatly, saves the daily constant expense of project management department 150000 yuan, and accumulative generation is direct, indirect economic effect more than 430000 yuan, much larger than the expense increased.
Claims (10)
1., based on a Placement of Underwater Concrete for Casting technique for DLC four hopper, it is characterized in that, comprise the following steps:
1) set up operating platform (1) at the top scaffold of pile body (2) and four parallel i iron (3), its end face lays plank as work plane;
2) on adjacent two i iron (3), conduit support beam (4) is installed respectively;
3) by two conduit support beams (4), conduit (5) is installed respectively;
4) respectively by two bottom hoppers (6) by Flange joint to two conduit (5), simultaneously bottom valve (7) is set respectively at outlet (601) place of two bottom hoppers (6);
5) by the main hook (10) of crane two top hoppers (8) are risen respectively and winch to directly over two bottom hoppers (6), upper valve (9) is set respectively at outlet (801) place of two top hoppers (8) simultaneously, then by wire rope, bottom valve (7) is connected with upper valve (9), and by wire rope, upper valve (9) is connected with the auxiliary hook (11) of crane, wire rope is all in relaxed state;
6) respectively to two bottom hoppers (6) and two top hopper (8) pumping of concrete to hopper top;
7) top hopper (8) is promoted by the main hook (10) of crane, until bottom valve (7) departs from outlet (601) place of bottom hopper (6), bottom hopper (6) starts blowing;
8) bottom hopper (6) be discharged to two/for the moment, upper valve (9) is promoted by the auxiliary hook (11) of crane, until upper valve (9) departs from outlet (801) place on top hopper (8), two top hoppers (8) start blowing;
9) lower portion hopper (6) continues to pump into concrete, underwater concrete continous pouring, until terminate the Placement of Underwater Concrete for Casting of pile body (2).
2. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to claim 1, is characterized in that, step 1) in, be also included in the idle area of the other choosing of pile body (2) and dig detention tank.
3. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to claim 1, it is characterized in that, step 5) in, one end that the wire rope for being connected with upper valve (9) by bottom valve (7) is connected with upper valve (9) is provided with U-loop (701).
4. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to claim 1, is characterized in that, step 8) in, after two top hopper (8) blowings are complete, hang out outside the venue.
5. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to claim 1, is characterized in that, upper valve (7) is no more than 2m with the drop height of bottom valve (9).
6. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to any one of claim 1 to 5, it is characterized in that, the volume of bottom hopper (6) and top hopper (8) is 4.5m
3.
7. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to any one of claim 1 to 5, is characterized in that, the internal diameter of conduit (5) is 30cm.
8. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to any one of claim 1 to 5, is characterized in that, the specification of i iron (3) is 200mm × 102mm × 9mm.
9. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to any one of claim 1 to 5, is characterized in that, the quantity of crane is 2, and its tonnage is 25T.
10. a kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper according to any one of claim 1 to 5, is characterized in that, upper valve (7) and bottom valve (9) are stopper.
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| CN201410208760.1A CN104032742B (en) | 2014-05-16 | 2014-05-16 | A kind of Placement of Underwater Concrete for Casting technique based on DLC four hopper |
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| CN104032742B true CN104032742B (en) | 2016-04-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106013162B (en) * | 2016-06-01 | 2018-01-12 | 安徽建工集团有限公司 | A kind of construction technology of drape process pouring underwater concrete |
| CN106545016B (en) * | 2016-11-07 | 2018-09-11 | 中建三局集团有限公司 | Super-large diameter pressure bearing pile double duct underwater gliders method |
| CN114718073B (en) * | 2022-06-09 | 2022-09-20 | 中国海洋大学 | Underwater riprap leveling device |
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|---|---|---|---|---|
| JPH10110433A (en) * | 1996-10-08 | 1998-04-28 | Ohbayashi Corp | Concrete placing method making use of tremie pipe and reinforced cage used therefor |
| KR20020068119A (en) * | 2001-02-20 | 2002-08-27 | (주)한석엔지니어링건축사사무소 | A Construction Method of Underwater Concreting |
| CN103031848A (en) * | 2012-12-19 | 2013-04-10 | 广东省基础工程公司 | Concrete grouting construction method and device for implementing same |
| CN203113343U (en) * | 2012-12-18 | 2013-08-07 | 中建四局第一建筑工程有限公司 | Underwater concrete casting device for large-diameter cast-in-place pile |
| CN203145021U (en) * | 2013-04-16 | 2013-08-21 | 葛洲坝集团基础工程有限公司 | Underwater concrete pouring and constructing device |
| CN203346891U (en) * | 2013-07-02 | 2013-12-18 | 张璐 | Underwater concrete pouring hopper |
-
2014
- 2014-05-16 CN CN201410208760.1A patent/CN104032742B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110433A (en) * | 1996-10-08 | 1998-04-28 | Ohbayashi Corp | Concrete placing method making use of tremie pipe and reinforced cage used therefor |
| KR20020068119A (en) * | 2001-02-20 | 2002-08-27 | (주)한석엔지니어링건축사사무소 | A Construction Method of Underwater Concreting |
| CN203113343U (en) * | 2012-12-18 | 2013-08-07 | 中建四局第一建筑工程有限公司 | Underwater concrete casting device for large-diameter cast-in-place pile |
| CN103031848A (en) * | 2012-12-19 | 2013-04-10 | 广东省基础工程公司 | Concrete grouting construction method and device for implementing same |
| CN203145021U (en) * | 2013-04-16 | 2013-08-21 | 葛洲坝集团基础工程有限公司 | Underwater concrete pouring and constructing device |
| CN203346891U (en) * | 2013-07-02 | 2013-12-18 | 张璐 | Underwater concrete pouring hopper |
Non-Patent Citations (1)
| Title |
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| 双导管法灌注水下混凝土桩基;郭艳成等;《山西水利科技》;20021130(第04期);第23-24页 * |
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