CN101289867A - Construction process for removing foundation ditch in water - Google Patents
Construction process for removing foundation ditch in water Download PDFInfo
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- CN101289867A CN101289867A CNA2008100357884A CN200810035788A CN101289867A CN 101289867 A CN101289867 A CN 101289867A CN A2008100357884 A CNA2008100357884 A CN A2008100357884A CN 200810035788 A CN200810035788 A CN 200810035788A CN 101289867 A CN101289867 A CN 101289867A
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Abstract
The invention discloses a dismantling construction process for foundation pits in water area, which is mainly to dismantle supports at four supporting docking blocks at first during the construction of a dock entrance bed-plate and docking blocks. After the construction of a dock entrance structure is finished, the first stage dismantling task is performed, steps of the first stage are as follows: the dismantling period begins after the construction of a dock entrance threshold, docking blocks and granite is finished, the dismantling sequence is from the bottom up, a third support and a second support are orderly dismantled, front-edge slope protection is cleared up, a first concrete support and a river-side breast wall are dismantled, vertical columns are hoisted, steel sheet piles is pulled out, underwater dredge is carried out, front-edge steel sheet piles are cut off, and a dock entrance bed-plate is cleared up. The second stage dismantling task is carried out, the dismantling period begins after a dock gate is closed, the dismantling sequence is from the bottom up, a bank-side breast wall, a first concrete support, a second concrete support and a third concrete support are orderly dismantled, bank-side steel sheet piles are cut off and the dock entrance bed-plate is cleared up. The construction process is scientific and reasonable, steps are simple and easy to realize; moreover, the construction process can avoid the dock entrance structure from being damaged during the whole construction process, save the energy consumption, and protect the environment.
Description
Technical field:
The present invention relates to a kind of dock entrance construction technology, particularly a kind of construction technology that is applied to removing foundation ditch in water.
Background technology:
The dock entrance space enclosing structure is as temporary structure, in the dock entrance work progress, construction will be removed after finishing successively, close to satisfy dock entrance structure construction, dock gate, dock entrance links to each other structure construction needs such as position dock chamber and revetment, remove to comprise contents such as steel supporting removal, concrete collar tie beam and wave wall are removed, column is removed, steel sheet pile is removed, clears up and dredged.If neither one reasonably removes work progress, will the overall structure of dock entrance be worked the mischief, make embodying that the allomeric function of dock entrance can not be complete.
Present dock entrance has adopted a kind of design, construction technical schemes of novel above-water large-scale foundation pit enclosure structure, and is totally independent of waterbornely, that is: the dock entrance construction has been adopted steel sheet pile to add and supported above-water large-scale vertical type foundation pit enclosure structure as shown in Figure 1.
Dock entrance excavation of foundation pit face absolute altitude is-10.65m, and design high-water be+4.13m under the normal condition of the enclosure wall outside, and the excavation of foundation pit degree of depth is about 15m, adopts steel sheet pile to make enclosure wall, in establish the support of 5 roads and enclose purlin system (7).Enclosure wall adopts PU32 steel sheet pile (1), in order to strengthen the stability of stagnant water effect and wind and wave resistance, added row's PU16 steel sheet pile (2) in the peripheral a distance of the enclosure wall of the distance outside and thing both sides, this campshed fuses by the collar tie beam at the top wave wall (5) of holding concurrently, (3) backfill sand between two row's sheet piles.
Because whole foundation ditch system is seated on outer domatic under water of existing embankment, in order to keep the whole balance of going along with sb. to guard him system periphery load, take in the dock entrance medial and lateral by cutting the slope unloading and throwing the measure of dosing pressure the mud face absolute altitude of enclosure wall outer periphery to be consistent respectively.
Support arrangement adopts the north-south that support is added the scheme of angle brace, and main support interval is generally 7.5m, and a plane frame is set at a certain distance, wherein:
First road collar tie beam (double as wave wall) and centre of support adopt reinforced concrete structure to guarantee the rigidity at top.
Centre of support, second road is enclosed purlin and is supported H700 * 300 shaped steel that all adopt Two bors d's oeuveres, and connecting rod and bridging adopt H700 * 300 shaped steel.
Centre of support, the 3rd road adopts steel to enclose purlin, steel support.
Centre of support, the 4th road adopts steel to enclose purlin, steel support.
Centre of support, the 5th road adopts steel to enclose purlin, steel support.
Simultaneously three root posts are divided in support at every, between be provided with specific distance.
Steel post (4) adopts Φ 700 * 14 steel pipes, and stand column pile (6) is all utilized dock entrance main structural engineering Φ 800PHC stake, steel post is welded on the preformed pile top and preformed pile is beaten to design elevation by pile driving barge together.
Dock entrance space enclosing structure complexity, and the structure of each part all can both impact the overall structure of dock entrance, how reasonably to remove dock entrance and goes along with sb. to guard him and will seem most important.
Summary of the invention:
The present invention is directed to the above-mentioned problem of setting forth, and provide a kind of construction reasonable, make the not impaired construction process for removing foundation ditch in water of overall structure of dock entrance.
In order to achieve the above object, construction process for removing foundation ditch in water provided by the invention, it mainly comprises following a few step:
(1) supporting removal: after the dock entrance bottom slab concreting is finished, removing dock entrance the 4th road steel supports, build the docking block bottom board concrete again to predetermined altitude, removing docking block position the 3rd road steel supports, build docking block first floor concrete again to predetermined altitude, remove the docking block position second road steel and support, build docking block second layer concrete again to predetermined altitude, remove the docking block position first road concrete and support, build the 3rd layer of concrete of docking block again to predetermined altitude; Build dock entrance base plate threshold concrete in the meantime; Carry out the build of dock entrance granite veneer and accessory structure at last.
(2) above water is removed: finish and after dock entrance bank gusset weir reinforces simultaneously in step (1), removing river side the 3rd road steel successively supports, pour water and remove the second road steel support of river side, the dismounting first road concrete of pouring water supports and hangs except that stand column pile, remove side first road, river and support waling and wave wall, cleaning dock entrance outside bank protection is also dredged to desired depth, sand removal and cut off pull bar between double steel sheet pile, pull out the river side again and efflux steel sheet pile, dredge to cut off in the side of river to the desired depth in the dock entrance outside and arrange steel sheet pile, carry out the cleaning of dock entrance base plate at last and can realize that dock gate closes.
(3) land part is removed: step (2) finish finish with land other regional structures constructions after, dismounting closes on docking block gusset structure, after closing on docking block side revetment, the end of wing wall structure construction, extract the inboard ponding of dock entrance out and remove first, second and third road support of bank side simultaneously from top to bottom successively and cut off bank side steel sheet pile, carry out side dock chamber base plate at last and construct.
(4) the dismounting method of passing to down of the support of steel described in the above-mentioned steps realizes: before the steel supporting removal, pour water in the dock entrance, support absolute altitude according to steel, pour water to steel support base 30cm, to guarantee the stable of space enclosing structure; The step of installing is supported in contrast during the steel supporting removal, and the part that install the back is removed earlier, promptly removes connecting rod and to support, removes steel waling then, removes river side steel waling at last, wherein support is cut off in second row's stand column pile river side, needs to keep second row's column place bracket plate.
Described to connecting rod, the dismounting of support, waling is adopted manually at node location segmentation gas cutting, and hang to the barge in the dock entrance outside and transport to material or outfitting quay, be transported to land place again and stack.
Pour water in advance before the supporting removal of concrete described in the above-mentioned steps to the absolute altitude that supports following+2.5m, and adopt segmentation cutting and large-scale crane ship segmentation integral body to hang and remove.
Described segmentation is cut into respectively at the outside that concrete supports and collar tie beam connected node place, machine cuts or explosion otch are carried out in inboard and second middle part of arranging column connected node place and getting in touch beam.
By the construction process for removing foundation ditch in water that such scheme obtains, this construction technology is scientific and reasonable, and step is simple to be realized easily, in whole construction course, can be good at avoiding the dock entrance structural damage simultaneously, and energy efficient, protection environment.
Description of drawings:
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is dock entrance foundation pit enclosure structure sectional view among the present invention.
Fig. 2 removes the flat section schematic diagram for foundation ditch among the present invention.
Fig. 3 is a process chart of the present invention.
Fig. 4 supports the schematic diagram that segmentation is removed for concrete among the present invention.
The specific embodiment:
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Fig. 1 gives a kind of structure sectional view of dock entrance bracing of foundation pit, and baroque like this going along with sb. to guard him must be loaded down with trivial details when removing, and if dismounting is incorrect, can cause damage to whole dock entrance structure.Fig. 2 and Fig. 3 have provided a kind of scientific and reasonable construction process for removing: the dock entrance space enclosing structure remove the 5th road support be cast in dock entrance and the docking block bottom board concrete, enclosure wall PU32 steel sheet pile docking block side and base plate absolute altitude imbed the soil China and foreign countries with the lower part, all the other all need to remove.Whole as shown in Figure 2 demolishing process is divided into two parts:
Rear section space enclosing structure after the dock entrance structure construction is finished is divided into two stages dismountings:
Phase I above water 102 is removed: for dock gate is closed preceding zone of removing, dismounting waterborne, dismounting period is at the dock entrance threshold, after finishing, docking block and granite construction begin, the dismounting order is removed river side the 3rd road steel successively and is supported, pour water and remove the second road steel support of river side, the dismounting first road concrete of pouring water supports and hangs except that stand column pile, remove side first road, river and support waling and wave wall, cleaning dock entrance outside bank protection is also dredged to desired depth, sand removal and cut off pull bar between double steel sheet pile, pull out the river side again and efflux the AU16 steel sheet pile, dredge in the dock entrance outside and to desired depth, to cut off row PU32 steel sheet pile in the side of river, carry out the cleaning of dock entrance base plate at last and can realize that dock gate closes.Will satisfy dock gate after the dismounting of this stage can close smoothly, and in the phase I demolishing process, interim flood control dash, the effect of retaining soil are born in bank gusset weir in addition.
The land part 103 of second stage is removed: for dock gate is closed zone, the land dismounting that remove the back, dismounting is promptly arranged to remove after dock gate is closed period, dismounting closes on docking block gusset structure for removing earlier in proper order, after closing on docking block side revetment, the end of wing wall structure construction, extract the inboard ponding of dock entrance out and remove first, second and third road support of bank side simultaneously from top to bottom successively and cut off bank side PU32 steel sheet pile, carry out side dock chamber base plate at last and construct.
Before the steel supporting removal, pour water in the dock entrance when steel in the construction technology that relates to above is supported on dismounting, support absolute altitude, pour water to steel support base 30cm, to guarantee the stable of space enclosing structure according to steel.The step of installing is supported in the contrast of the order of steel supporting removal, and the part that install the back is removed earlier, at first removes connecting rod and to support, remove steel waling then, remove river side steel waling at last, wherein support is cut off in second row's stand column pile river side, need to keep second row's column place bracket plate.When removing steel and supporting, connecting rod, to support, enclose figure and adopt manually at node location segmentation gas cutting, adopt the 60-100t crane ship to hang to the barge in the dock entrance outside and transport to material or outfitting quay, be transported to land place again and stack.Owing to be operation at sea, it is difficult point that fine-stone concrete is removed, and intends considering manually to cut, and arranges raft on the water surface under fine-stone concrete, on raft the fine-stone concrete that cuts is hung out outside the depressed place as far as possible; The fine-stone concrete that part cuts is fallen on the base plate naturally, cooperates diver's underwater cleaning at the later stage dredge boat.
Concrete supported pour water in advance before the 105 first road concrete supporting removals when removing to supporting down+absolute altitude of 2.5m, the first road concrete supports takes the segmentation cutting, and adopts 400t large-scale crane ship segmentation integral body to hang and remove.Support the outside and collar tie beam connected node place, inboardly cut or the explosion otch at the first road concrete respectively as Fig. 4 segmentation cutting time-division fragment position 104 with the middle part of second arranging column connected node place, get in touch beam.Finish the back in segmentation and support segmentation position employing machine cuts mode at the first road concrete.Tool cutting adopts the steel wire cutting machine to cut, at first by crane ship in advance at the good hoist cable of concrete support arrangement, crane ship fixes the support that need cut off, begins segmentation then and cuts off.Steel wire cutting machine volume is light and handy, and is easy to operate, and efficient is higher, adopts water cooling, and dust is few, but the length and the cut direction of while regulated at will diamond line relatively are fit to the cutting of concrete structure.As adopt the mode of machine cuts, intend being equipped with 2 complete equipments and cut simultaneously.
For accelerating the supporting removal progress, take per two to stride integral lifting, the on-the-spot 200-400 ton crane ship that is equipped with, lifting adopts multiple spot to hang, and before the crane ship lifting, cuts off the column under supporting.After supporting lifting, crane ship directly hangs to dock entrance and the land to the north of the revetment, and land then outfit pick machine is pulverized.
Outside collar tie beam and wave wall are removed, because the circle fine strain of millet in the dock entrance outside and wave wall are fully on the water, and volume is bigger, adopts mechanical removal or segmentation to hang and remove to be difficult to operation, through scheme relatively, takes to pulverize the mode of explosion, manually clears up after the pulverizing again.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the manual just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1, construction process for removing foundation ditch in water is characterized in that, comprises following a few step:
(1) supporting removal: after the dock entrance bottom slab concreting is finished, removing dock entrance the 4th road steel supports, build the docking block bottom board concrete again to predetermined altitude, removing docking block position the 3rd road steel supports, build docking block first floor concrete again to predetermined altitude, remove the docking block position second road steel and support, build docking block second layer concrete again to predetermined altitude, remove the docking block position first road concrete and support, build the 3rd layer of concrete of docking block again to predetermined altitude; Build dock entrance base plate threshold concrete in the meantime; Carry out the build of dock entrance granite veneer and accessory structure at last.
(2) above water is removed: finish and after dock entrance bank gusset weir reinforces simultaneously in step (1), removing river side the 3rd road steel successively supports, pour water and remove the second road steel support of river side, the dismounting first road concrete of pouring water supports and hangs except that stand column pile, remove side first road, river and support waling and wave wall, cleaning dock entrance outside bank protection is also dredged to desired depth, sand removal and cut off pull bar between double steel sheet pile, pull out the river side again and efflux steel sheet pile, dredge to cut off in the side of river to the desired depth in the dock entrance outside and arrange steel sheet pile, carry out the cleaning of dock entrance base plate at last and can realize that dock gate closes.
(3) land part is removed: step (2) finish finish with land other regional structures constructions after, dismounting closes on docking block gusset structure, after closing on docking block side revetment, the end of wing wall structure construction, extract the inboard ponding of dock entrance out and remove first, second and third road support of bank side simultaneously from top to bottom successively and cut off bank side steel sheet pile, carry out side dock chamber base plate at last and construct.
2, construction process for removing foundation ditch in water according to claim 1, it is characterized in that, the dismounting method of passing to down that steel supports in the described step realizes: before the steel supporting removal, pour water in the dock entrance, support absolute altitude according to steel, pour water to steel support base 30cm, to guarantee the stable of space enclosing structure; The step of installing is supported in contrast during the steel supporting removal, and the part that install the back is removed earlier, promptly removes connecting rod and to support, removes steel waling then, removes river side steel waling at last, wherein support is cut off in second row's stand column pile river side, needs to keep second row's column place bracket plate.
3, construction process for removing foundation ditch in water according to claim 2, it is characterized in that, described to connecting rod, the dismounting of support, waling is adopted manually at node location segmentation gas cutting, and hang to the barge in the dock entrance outside and transport to material or outfitting quay, be transported to land place again and stack.
4, construction process for removing foundation ditch in water according to claim 1 is characterized in that, pours water in advance before the concrete supporting removal in the described step to the absolute altitude that supports following+2.5m, and adopts segmentation cutting and large-scale crane ship segmentation integral body to hang and remove.
5, construction process for removing foundation ditch in water according to claim 4, it is characterized in that described segmentation is cut into respectively at the outside that concrete supports and collar tie beam connected node place, machine cuts or explosion otch are carried out in inboard and second middle part of arranging column connected node place and getting in touch beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100357884A CN101289867B (en) | 2008-04-09 | 2008-04-09 | Construction process for removing foundation ditch in water |
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| CN2008100357884A CN101289867B (en) | 2008-04-09 | 2008-04-09 | Construction process for removing foundation ditch in water |
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| CN101289867B CN101289867B (en) | 2010-06-16 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094425A (en) * | 2010-12-24 | 2011-06-15 | 中铁六局集团有限公司 | Foundation pit construction method adopting shallow buried depth Larsen steel plate pile as protective cofferdam |
| CN103184739A (en) * | 2011-12-29 | 2013-07-03 | 五冶集团上海有限公司 | Demolition blasting method for reinforced concrete bracing |
| CN103334439A (en) * | 2013-06-06 | 2013-10-02 | 广西建工集团第五建筑工程有限责任公司 | Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure |
| CN105507322A (en) * | 2016-01-21 | 2016-04-20 | 中铁隧道集团有限公司 | Drying cutting method for foundation pit steel tube plug pile in immersed tube tunnel cofferdam |
| CN106381878A (en) * | 2016-10-27 | 2017-02-08 | 中建三局集团有限公司 | Environment-friendly dismantling construction method for two-layer steel sheet pile and soil core composite cofferdam |
| CN111236265A (en) * | 2020-03-24 | 2020-06-05 | 中建一局集团第三建筑有限公司 | Unilateral waterside bridge foundation pit supporting system and construction method thereof |
| CN111236253A (en) * | 2020-02-11 | 2020-06-05 | 中铁隧道集团二处有限公司 | Construction process for installing steel purlin and steel support on water |
| CN113882431A (en) * | 2021-10-12 | 2022-01-04 | 中交第四航务工程局有限公司 | Construction method for dismantling end cofferdam |
-
2008
- 2008-04-09 CN CN2008100357884A patent/CN101289867B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094425A (en) * | 2010-12-24 | 2011-06-15 | 中铁六局集团有限公司 | Foundation pit construction method adopting shallow buried depth Larsen steel plate pile as protective cofferdam |
| CN103184739A (en) * | 2011-12-29 | 2013-07-03 | 五冶集团上海有限公司 | Demolition blasting method for reinforced concrete bracing |
| CN103334439A (en) * | 2013-06-06 | 2013-10-02 | 广西建工集团第五建筑工程有限责任公司 | Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure |
| CN103334439B (en) * | 2013-06-06 | 2015-06-24 | 广西建工集团第五建筑工程有限责任公司 | Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure |
| CN105507322A (en) * | 2016-01-21 | 2016-04-20 | 中铁隧道集团有限公司 | Drying cutting method for foundation pit steel tube plug pile in immersed tube tunnel cofferdam |
| CN106381878A (en) * | 2016-10-27 | 2017-02-08 | 中建三局集团有限公司 | Environment-friendly dismantling construction method for two-layer steel sheet pile and soil core composite cofferdam |
| CN111236253A (en) * | 2020-02-11 | 2020-06-05 | 中铁隧道集团二处有限公司 | Construction process for installing steel purlin and steel support on water |
| CN111236265A (en) * | 2020-03-24 | 2020-06-05 | 中建一局集团第三建筑有限公司 | Unilateral waterside bridge foundation pit supporting system and construction method thereof |
| CN113882431A (en) * | 2021-10-12 | 2022-01-04 | 中交第四航务工程局有限公司 | Construction method for dismantling end cofferdam |
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| CN101289867B (en) | 2010-06-16 |
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Effective date of registration: 20090320 Address after: Postcode of No. 132 Pu circuit, Shanghai, Pudong New Area: 200122 Applicant after: China hand in the Third Board Second Engineering Co., Ltd. Co-applicant after: China Construction Third Engineering Division Co., Ltd. Address before: Postcode of No. 132 Pu circuit, Shanghai, Pudong New Area: 200122 Applicant before: China Communications Third Navigational Bureau 2nd Engineering Co., Ltd |
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