CN104805857A - Detachable cyclic utilization bottomless steel jacket box and construction method thereof - Google Patents
Detachable cyclic utilization bottomless steel jacket box and construction method thereof Download PDFInfo
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- CN104805857A CN104805857A CN201510225841.7A CN201510225841A CN104805857A CN 104805857 A CN104805857 A CN 104805857A CN 201510225841 A CN201510225841 A CN 201510225841A CN 104805857 A CN104805857 A CN 104805857A
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Abstract
The invention relates to the field of bridge construction, in particular to a detachable cyclic utilization bottomless steel jacket box and a construction method of the detachable cyclic utilization bottomless steel jacket box. The detachable cyclic utilization bottomless steel jacket box is a bottomless closed cofferdam which is formed by connecting a plurality of independent box bodies arranged around an underwater bearing platform from bottom to top; each independent box body is defined by a plurality of box body unit faces; every two independent box bodies as well as every two box body unit faces are connected through a flange plate and a bolt; the flange plates are positioned at the inner side of the detachable cyclic utilization bottomless steel jacket box; a jacket box reinforced straight support and a jacket box reinforced inclined support which forms an acute-angle included angle with the jacket box reinforced straight support are arranged in each independent box body; two ends of each jacket box reinforced inclined support are intersected with adjacent box body unit faces of the same independent box body. By adopting the structure of the detachable cyclic utilization bottomless steel jacket box disclosed by the invention, a large-scale crane is not needed, the requirement on a place is not high, the detachable cyclic utilization bottomless steel jacket box can be recycled and reused, and the construction cost is reduced.
Description
Technical field
The present invention relates to field of bridge construction, be specifically related to one and detachably recycle bottomless steel jacket box and construction method thereof.
Background technology
Along with China's economic development, highway, railway are constructed on a large scale, and for adapting to the needs of communications and transportation, the line design of a lot of highway, railroad bridge is across great river, sea, and thus underwater support table, bridge pier can be found everywhere.At home, the construction method of underwater support table is a lot, and comprise single (two) wall steel cofferdam, steel boxed cofferdam, build island open cut, open caisson, pneumatic caisson etc., various construction method differs from one another.Because bottomless steel jacket box is relatively more extensive because being suitable for stratum, so bottomless steel jacket box becomes a kind of conventional construction method of underwater support table.The construction method of current employing is a lot, but it is all similar, during underwater support table construction, because steel jacket box is heavier, when steel jacket box sinks, large-scale crane is generally needed to coordinate, need to provide crane place, high to the requirement in place, after construction terminates, casing is not removed, cause waste of material, increase engineering cost.
CN102409690A (2012-4-11) discloses the construction technology that a kind of multiple stage continuous jack synchronously transfers bottomless Double-wall sin-gle-image radiography, but the method still exists the problems referred to above.
Summary of the invention
An object of the present invention solves prior art can not recycle the problems such as the difficulty causing construction cost to increase because of steel jacket box, provide a kind of detachable, recycle, construction safety is reliable, the one of reduction engineering cost detachably recycles bottomless steel jacket box.
Two of object of the present invention be to provide a kind of detachable, recycle, construction safety is reliable, reduce a kind of construction method detachably recycling bottomless steel jacket box of engineering cost.
First technical purpose of the present invention is achieved by the following technical programs:
One detachably recycles bottomless steel jacket box, and it is be arranged on the bottomless closed cofferdam that several independent case body around underwater support table are formed by connecting from bottom to top, and each described independent case body is enclosed by several box unit faces and forms; Described independent case body with between independent case body, described box unit face is connected by flange and bolt with between box unit face; Described flange is positioned at inside casing;
Be provided with the straight support of casing reinforcing in described independent case body and reinforce with described casing the casing directly supportting angle in an acute angle and reinforce diagonal brace; The two ends that diagonal brace reinforced by described casing are crossing with the adjacent boxes elemental area of same independent case body.
Adopt bottomless steel jacket box structure of the present invention, can not need large-scale crane, less demanding to place, casing can recycle, and saves construction cost.
As preferably, the height of every layer of described independent case body is 1.5-2.5m, and every layer assembled by 4 faces; Inside described independent case body, welding is provided with suspension ring.
Adopt this structure, be convenient to lifting and dismounting, save construction cost.
As preferably, bottom bottom casing, bolt do not gone up by above 1m position adpting flange.
Adopt this structure, lifting and dismounting can be convenient to while guarantee safety.
As preferably, described casing is reinforced straight support and is disposed in levels independent case body.
Adopt this structure, can ensure that bottomless steel jacket box of the present invention has enough supports and safety.
As preferably, described casing is reinforced straight support and is reinforced diagonal brace with described casing and be positioned in same level.
Adopt this structure, support and the safety of bottomless steel jacket box of the present invention can be strengthened further.
As preferably, the angle that described casing reinforces straight support and described casing reinforcing diagonal brace is 45 °.
As preferably, the independent case body being arranged on bottomless steel jacket box intermediate layer is provided be positioned in same level and be combined to form the described casing consistent with independent case body structure and reinforces and directly support.
Adopt this structure, support and the safety of bottomless steel jacket box of the present invention can be strengthened further, and save construction material and cost.
More preferably, described angle steel is connected with the wire rope being arranged on bottomless steel jacket box top.
Adopt this structure, be convenient to follow-up lifting and dismounting, construction cost is low.
Second technical purpose of the present invention is achieved by the following technical programs:
Detachably recycle a construction method for bottomless steel jacket box, it comprises the following steps successively:
(1) mast-up makes and lays: before mast-up is installed, and first drilling platform the first half is removed, leaves steel pipe pile; Drilled pile pile crown laitance is cut to concrete surface, the suspension bracket post of mast-up is placed on the pile crown abolished, again by the steel pipe pile of mast-up and drilled pile platform by being welded and fixed, support with suspension bracket post simultaneously and suspension bracket post and drilled pile casing are welded and fixed, welding hanging ring on hanging beam, at least one cucurbit installed by each suspension ring;
(2) bottomless steel jacket box makes: make steel jacket box according to cap design of pile size, ensures there is at least 1m distance to cushion cap limit inside casing, reserves bearing platform construction working space;
(3) interim bracket is installed on steel pipe pile;
(4) casing leading truck is installed: leading truck is fixed by welding on the steel pipe pile on four angles of drilling platform;
(5) assembled orlop casing on interim bracket: orlop casing is placed on interim bracket with crane, assembled orlop casing on interim bracket;
(6) interim bracket is removed and orlop hollow steel box immersion: after assembled for orlop casing getting well, sling with the cucurbit on hanging beam, remove all interim brackets, make orlop casing end face higher than the water surface assembled good orlop hollow steel box immersion, with the connection of expediently one deck casing and this layer of casing;
(7) the assembled and sinking of second layer casing: second layer casing box unit face crane is placed on bottom casing, the another use cucurbit be arranged on equally on hanging beam is hung to be prevented from rocking, after second layer casing and bottom casing are connected, sling a little with the described box unit face of described cucurbit by described second layer casing, ensure that the cucurbit of bottom casing on described box unit face is no longer stressed, then the cucurbit that bottom casing does not stress is dismantled, use the same method and the cucurbit in other box unit face dismantled; Then just assembled good hollow steel box immersion, notes during sinking the box unit of an independent case body face synchronously to be sunk;
(8) repeat step (7), assembled third layer casing on second layer casing, assembled 4th layer of casing on third layer casing ... until hollow steel box immersion is to design attitude;
(9) remove mast-up, extract the steel pipe pile of drilling platform;
If (10) step (8) casing can not sink down into design attitude by deadweight, then after completing steps (9), utilize the shaped steel of mast-up, shaped steel is laid on casing top, reinforced plastic water container laid by shaped steel, then toward water filling in reinforced plastic water container until steel jacket box sinks down into design attitude;
(11) progressively got rid of by the water in casing, along with in casing, the decline of water level progressively adds inner support in casing, after reaching requirement, removes mud in casing and, to design elevation, adds wood and support, then apply blinding concrete bottom casing;
(12) casing is removed: treat cushion cap, pier construction is complete just can be removed casing, several point is welded with longitudinal piece of angle steel and casing each before removing, as interim connection, angle steel longitudinal pitch is about 1m, wire rope wire rope is numbered on bolt on each angle steel, all wire rope are temporarily fixed at casing top, place stand-by, except casing top layer top, the connecting bolt at other each angles of each layer of casing is disassembled, after checking that confirmation does not have connecting bolt, in casing, water filling reduces differential water pressures inside and outside casing, progressively all inner supports are all removed from bottom to up along with water level rises gradually, treat there is no differential water pressures inside and outside casing, start to remove casing: whole casing divides four dismountings, each dismounting elemental area, the interim connecting angle crane in the face that the face for removing must be connected with this dismounting face during dismounting passes through the wire rope of bolt on angle steel before and slings one by one from bottom to up until angle steel departs from casing completely, after angle steel departs from casing, wire rope on bolt on the suspension ring of this elemental area, crane hangs this elemental area by wire rope, remove other connecting bolts in this elemental area and adjacent cells face, remove the connection in this elemental area and adjacent cells face, this elemental area is made to become independent face, be connected without any with other elemental areas, with crane, this elemental area is hung on the bank, remove one by one with same way other elemental areas by casing.
Orlop casing of the present invention and first floor casing; Leading truck of the present invention can play guiding, positioning action, can by hollow steel box immersion to precalculated position by the effect of leading truck.Leading truck is welded on steel pipe pile, ensures that the axis in casing each face when sinking can not be out of position.Casing assembled good after, no matter whether sink to design attitude, all carry out step 9, not sinking to design attitude just carry out step 10; If sink to design attitude, then skip step 10, carry out step 11.Bottom casing, add wood support, its objective is the safety increasing casing, apply blinding concrete, wood supports and buries by blinding concrete, and wood supports and no longer takes out.
As preferably, described step (10), toward water filling in reinforced plastic water container, if after filling water or can not sink, then vibrates reinforced plastic water container with vibrating hammer, until steel jacket box sinks down into design attitude.
As preferably, mast-up is made up of 8 suspension ring on 4 suspension bracket posts, 4 hanging beams, hanging beam and support member; Described every root hanging beam installs two 2 suspension ring.
For guaranteeing that hanging beam can be sling safely whole casing, will by calculating the steel section size determining hanging beam when making mast-up.A cucurbit installed by each suspension ring.Suspension ring are welded on hanging beam.The position of suspension ring: the guarantee cucurbit be arranged on suspension ring is sling after casing, and the axis of casing is at design attitude.
So, large-scale crane is not needed to coordinate when casing is dismantled.Be connected by flange between layers, between face with face, flange is positioned at inside casing, and bolt do not gone up by bottom casing (first floor casing) bottom about 1m adpting flange.Welding hanging ring inside casing, the vertical axis of the suspension ring on its vertical axis and hanging beam on the same line.
As preferably, the interim bracket of described step (5) is arranged on the steel pipe pile of drilling platform outermost, and interim bracket adopts i iron, is fixed by welding on the steel pipe pile of outermost; When described step (8) is assembled, the connecting sewing place of casing adopts 8-10mm rubber tile to make collision mat, adopts atomized ash to carry out reinforcement shutoff with cotton-wool in the place of right-angled intersection seam.
Interim bracket, a little more than the water surface, facilitates assembled bottom casing (first floor casing) on bracket.Interim bracket, to casing platform for lining, can prevent casing double swerve and be not easy to assembled.
As preferably, when welding casing with angle steel, weld seam is through longitudinal piece of casing.
Accompanying drawing explanation
Fig. 1 is drilling platform steel pipe pile and the mast-up floor map of the embodiment of the present invention;
Fig. 2 is the mast-up elevational schematic view of the embodiment of the present invention;
Fig. 3 is the assembled good rear schematic diagram of the bottom casing of the embodiment of the present invention;
Fig. 4 is that front view reinforced by embodiment of the present invention casing;
Fig. 5 is that top view reinforced by embodiment of the present invention casing;
Fig. 6 is embodiment of the present invention box unit face and Bolted angle connection schematic diagram;
Fig. 7 is that the present invention detachably recycles bottomless steel jacket box overall schematic;
Fig. 8 is that the present invention detachably recycles bottomless steel jacket box schematic top plan view;
Fig. 9 is the front elevational schematic that the present invention detachably recycles bottomless steel jacket box and riverbed, river surface and cushion cap and combines;
Figure 10 is that before namely Fig. 6 amplifier section of the present invention removes casing, the longitudinal piece connection diagram of casing followed by angle steel;
Figure 11 is that the present invention adds water tank schematic diagram on casing top;
Wherein, 1-casing; Straight support reinforced by 2-casing; Diagonal brace reinforced by 3-casing; 4-round log; 5-cushion cap; 6-bed course; 7-drilled pile; 8-riverbed; 9-river surface; 10-steel pipe pile; 11-casing; 12-suspension bracket post; 13-suspension bracket post supports; 14-hanging beam; The interim bracket of 15-; 16-leading truck; 17-cucurbit; 18-drilled pile platform; 19-shaped steel; 20-reinforced plastic water container; 21-angle steel; 22-suspension ring; 23-bracket; 24-weld seam; The longitudinal piece of 25-.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Fig. 1-Figure 10, detachably recycle bottomless steel jacket box 1, it is be arranged on the bottomless closed cofferdam that several independent case body around underwater support table are formed by connecting from bottom to top, and each independent case body is enclosed by several box unit faces and forms; Be connected by flange and bolt between independent case body with independent case body, between box unit face with box unit face; Flange is positioned at inside casing; Be provided with the straight support 2 of casing reinforcing in independent case body and reinforce with casing the casing directly supportting 2 angles in an acute angle and reinforce diagonal brace 3; The two ends that diagonal brace 3 reinforced by casing are crossing with the adjacent boxes elemental area of same independent case body.The height of such as every layer of independent case body is 1.5-2.5m, and every layer assembled by 4 faces; Inside independent case body, welding is provided with suspension ring 22.
Consider from safety and construction cost, bottom bottom casing, bolt do not gone up by above 1m position adpting flange.Casing is reinforced straight support 2 and is disposed in levels independent case body.The straight support 2 of casing reinforcing is reinforced diagonal brace 3 with casing and is positioned in same level.The angle that casing reinforces straight support 2 and casing reinforcing diagonal brace 3 is 45 °.The independent case body being arranged on bottomless steel jacket box 1 intermediate layer is provided be positioned in same level and be combined to form the casing consistent with independent case body structure and reinforces and directly support 2.
For the ease of dismounting, the junction spot welding of box unit face is connected with angle steel 21; Angle steel 21 is connected with the wire rope being arranged on bottomless steel jacket box 1 top.As shown in Figure 10, when welding with angle steel 21 pairs of casings, weld seam 24 is not through longitudinal piece 25 of casing.In this example underwater support table to be of a size of the wide * of the long * of 7m*7m*2.5m(high), korneforos mud is comparatively dark, and place, riverbank is limited, and large-scale crane lifting operation is difficult to carry out, and can only use small crane coordinative construction, uses 25t mobile crane in this example.This routine underwater support table pier shaft uses the construction method detachably recycling bottomless steel jacket box to carry out according to the following steps:
1. mast-up makes and lays: before mast-up is installed, and first drilling platform the first half is removed, leaves steel pipe pile 10.Mast-up as shown in Figure 1 and Figure 2, drilled pile 7 pile crown laitance is cut to concrete surface, the suspension bracket post 12 of mast-up is placed on the pile crown abolished, again by the steel pipe pile 10 of mast-up and drilled pile platform 18 by being welded and fixed, support 13 with suspension bracket post suspension bracket post 12 and drilled pile casing 11 are welded and fixed simultaneously, welding hanging ring on hanging beam, each suspension ring is installed 1 cucurbit 17.Mast-up is made up of the every root hanging beam of 8 suspension ring 2 suspension ring on 4 suspension bracket posts, 12,4 hanging beams 14, hanging beam and support member.For guaranteeing that hanging beam 14 can be sling safely whole casing, will by calculating the steel section size determining hanging beam 14 when making mast-up.A cucurbit installed by each suspension ring.Suspension ring are welded on hanging beam.The position of suspension ring: the guarantee cucurbit 17 be arranged on suspension ring is sling after casing, and the axis of casing is at design attitude.
2. bottomless steel jacket box makes: make steel jacket box 1 according to cap design of pile size, ensures about there is 1m distance to cushion cap limit inside casing, reserves bearing platform construction working space.
Bottomless steel jacket box is divided into some layers, and the height of every layer is about 2m, and every layer assembled by 4 faces.So, large-scale crane is not needed to coordinate when casing is dismantled.Be connected by flange between layers, between face with face, flange is positioned at inside casing, and bottom bottom casing first floor casing, bolt do not gone up by about 1m adpting flange.Welding hanging ring inside casing, the vertical axis of the suspension ring on its vertical axis and hanging beam on the same line.In this example, bottomless steel jacket box forms by 4 layers, and the height of every layer is respectively from top to bottom: 1m+2m+2m+2m, and casing every layer is made up of 4 faces, and four angles are set as fillet, and piece is crossed and had some on angle, and digression is about about 40cm; Layer passes through Flange joint with layer, face and face.
3. interim bracket 15 is installed on steel pipe pile 10.Interim bracket 15 is arranged on the steel pipe pile 10 of drilling platform 18 outermost, and interim bracket adopts i iron, is fixed by welding on the steel pipe pile of outermost.Interim bracket, a little more than the water surface, facilitates assembled bottom casing first floor casing on bracket.
4. casing leading truck is installed: leading truck 16 is fixed by welding on the steel pipe pile 10 on four angles of drilling platform.Leading truck 16 can play guiding, positioning action, can by hollow steel box immersion to precalculated position by the effect of leading truck 16.Leading truck is welded on steel pipe pile 10, ensures that the axis in casing each face when sinking can not be out of position
5. assembled orlop casing and first floor casing on interim bracket 15: orlop casing is placed on interim bracket 15 with crane, assembled orlop casing and first floor casing on interim bracket 15.Casing platform for lining given by interim bracket 15, can prevent casing double swerve and be not easy to assembled.
6. interim bracket is removed and bottom casing and first floor hollow steel box immersion: by the casing of the bottom and first floor casing assembled good after, sling with the cucurbit of 8 on hanging beam 17, remove all interim brackets 15, by assembled good orlop casing and first floor hollow steel box immersion to casing end face a little more than the water surface, with the connection of expediently one deck casing and this layer of casing.
7. the assembled and sinking of second layer casing: second layer casing face crane is placed on bottom casing first floor casing, another use 2 cucurbits (being arranged on equally on hanging beam) are hung to be prevented from rocking, after second layer casing and bottom casing and first floor casing are connected, with these 2 cucurbits, is sling a little in this face of casing, ensure bottom casing and two cucurbits 7 of first floor casing on this face no longer stressed, then those two cucurbits that bottom casing and first floor casing do not stress are dismantled, use the same method and the cucurbit in other 3 faces dismantled.Time assembled, the connecting sewing place of casing adopts 8-10mm rubber tile to make collision mat, adopts atomized ash to carry out reinforcement shutoff with cotton-wool, by assembled good hollow steel box immersion, note wanting 4 faces synchronously to sink during sinking in the place of right-angled intersection seam.
8. step is repeated 7., assembled third layer casing on second layer casing, assembled 4th layer of casing on third layer casing ... until hollow steel box immersion is to design attitude.
9. remove mast-up, extract the steel pipe pile 10 of drilling platform.
if step 8. casing can not sink down into design attitude by deadweight, then completing steps 9. after, utilize the shaped steel 19 of mast-up, shaped steel 19 is laid on casing top, shaped steel is laid reinforced plastic water container 20, then toward water filling in reinforced plastic water container, if after filling water or can not sink, then vibrate reinforced plastic water container with vibrating hammer, until steel jacket box sinks down into design attitude.After sinking to design attitude, water tank 20 and shaped steel 19 are removed.
progressively the water in casing is got rid of, decline along with water level in casing progressively adds inner support and reinforces in casing, after reaching requirement, in removing casing, mud is to design elevation, bottom casing, add wood support such as round log 4, then apply concrete cushion 6, next step abolishes pile crown, construction bearing platform and pier shaft.
casing is removed: treat cushion cap, pier construction is complete just can be removed casing, weld with longitudinal piece in angle steel and casing 4 faces before removing, weld seam disconnects at casing connecting sewing place, see Fig. 5, as interim connection, 1 wire rope wire rope is numbered on bolt on each angle steel, all wire rope are temporarily fixed at casing top, place stand-by, except casing top layer top, the connecting bolt in other each layer 4 faces of casing and face is disassembled, if bottom casing and first floor casing have connecting bolt inside mud, then should remove part mud then the bolt in mud also to be disassembled, after checking that confirmation does not have connecting bolt, in casing, water filling reduces differential water pressures inside and outside casing, progressively all inner supports are all removed from bottom to up along with water level rises gradually, treat there is no differential water pressures inside and outside casing, start to remove casing: whole casing divides four dismountings, each dismounting elemental area, interim connecting angle 21 crane in the face that the face for removing must be connected with this dismounting face during dismounting passes through the wire rope of bolt on angle steel 21 before and slings until angle steel 21 departs from casing completely from bottom to up one by one, after angle steel 21 departs from casing, wire rope on bolt on the suspension ring of this elemental area, crane hangs this elemental area by wire rope, remove other connecting bolts in this elemental area and adjacent cells face, remove the connection in this elemental area and adjacent cells face, this elemental area is made to become independent face, be connected without any with other elemental areas, with crane, this elemental area is hung on the bank, remove one by one with same way other elemental areas by casing.
Use the present invention, result shows, can not need large-scale crane, less demanding to place, and casing can recycle, and saves construction cost.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this manual, as long as but be all subject to the protection of Patent Law in right of the present invention.
Claims (9)
1. one kind detachably recycles bottomless steel jacket box (1), it is characterized in that: it is be arranged on the bottomless closed cofferdam that several independent case body around underwater support table are formed by connecting from bottom to top, and each described independent case body is enclosed by several box unit faces and forms; Described independent case body with between independent case body, described box unit face is connected by flange and bolt with between box unit face; Described flange is positioned at inside casing;
Be provided with the straight support (2) of casing reinforcing in described independent case body and reinforce with described casing the casing directly supportting (2) angle in an acute angle and reinforce diagonal brace (3); The two ends that diagonal brace (3) reinforced by described casing are crossing with the adjacent boxes elemental area of same independent case body.
2. one according to claim 1 detachably recycles bottomless steel jacket box (1), it is characterized in that: the height of every layer of described independent case body is 1.5-2.5m, and every layer assembled by 4 faces; Inside described independent case body, welding is provided with suspension ring (22).
3. one according to claim 2 detachably recycles bottomless steel jacket box (1), it is characterized in that: described casing is reinforced straight support (2) and is disposed in levels independent case body.
4. one according to claim 3 detachably recycles bottomless steel jacket box (1), it is characterized in that: the straight support (2) of described casing reinforcing is reinforced diagonal brace (3) with described casing and is positioned on same horizontal plane.
5. one according to claim 4 detachably recycles bottomless steel jacket box (1), it is characterized in that: the angle that described casing reinforces straight support (2) and described casing reinforcing diagonal brace (3) is 45 °.
6. one according to claim 5 detachably recycles bottomless steel jacket box (1), it is characterized in that: the independent case body being arranged on bottomless steel jacket box (1) intermediate layer is provided be positioned in same level and be combined to form the described casing consistent with independent case body structure and reinforces and directly support (2).
7. detachably recycle a construction method for bottomless steel jacket box (1), it is characterized in that: it comprises the following steps successively:
(1) mast-up makes and lays: before mast-up is installed, and first drilling platform the first half is removed, leaves steel pipe pile (10); Drilled pile (7) pile crown laitance is cut to concrete surface, the suspension bracket post (12) of mast-up is placed on the pile crown abolished, again by the steel pipe pile (10) of mast-up and drilled pile platform (18) by being welded and fixed, support (13) with suspension bracket post suspension bracket post (12) and drilled pile casing (11) are welded and fixed simultaneously, welding hanging ring on hanging beam, each suspension ring is installed at least one cucurbit (17);
(2) bottomless steel jacket box makes: make steel jacket box (1) according to cap design of pile size, ensures there is at least 1m distance to cushion cap limit inside casing, reserves bearing platform construction working space;
(3) at steel pipe pile (10) the interim bracket of upper installation (15);
(4) casing leading truck is installed: leading truck (16) is fixed by welding on the steel pipe pile (10) on four angles of drilling platform;
(5) at the upper assembled orlop casing of interim bracket (15): with crane, orlop casing is placed on interim bracket (15), at the upper assembled orlop casing of interim bracket (15);
(6) interim bracket is removed and orlop hollow steel box immersion: after assembled for orlop casing getting well, sling with the cucurbit (17) on hanging beam, remove all interim brackets (15), make orlop casing end face higher than the water surface assembled good orlop hollow steel box immersion, with the connection of expediently one deck casing and this layer of casing;
(7) the assembled and sinking of second layer casing: second layer casing box unit face crane is placed on bottom casing, the another use cucurbit be arranged on equally on hanging beam is hung to be prevented from rocking, after second layer casing and bottom casing are connected, sling a little with the described box unit face of described cucurbit by described second layer casing, ensure that the cucurbit of bottom casing on described box unit face is no longer stressed, then the cucurbit that bottom casing does not stress is dismantled, use the same method and the cucurbit in other box unit face dismantled; Then by assembled good hollow steel box immersion, note during sinking wanting 4 faces synchronously to sink;
(8) step is repeated 7., assembled third layer casing on second layer casing, assembled 4th layer of casing on third layer casing ... until hollow steel box immersion is to design attitude;
(9) remove mast-up, extract the steel pipe pile (10) of drilling platform;
(10) if step 8. casing can not sink down into design attitude by deadweight, then at completing steps
after, utilize the shaped steel (19) of mast-up, shaped steel is laid on casing (1) top, shaped steel (19) is laid reinforced plastic water container (20), then toward water filling in reinforced plastic water container until steel jacket box sinks down into design attitude;
(11) progressively got rid of by the water in casing, along with in casing, the decline of water level progressively adds inner support in casing, after reaching requirement, removes mud in casing and, to design elevation, adds wood and support, then apply blinding concrete bottom casing;
(12) casing is removed: treat cushion cap, pier construction is complete just can be removed casing, remove front angle steel (21) and weld several point with longitudinal piece of casing each, as interim connection, wire rope is also numbered by wire rope on the upper bolt of each angle steel (21), all wire rope are temporarily fixed at casing top, place stand-by, except casing top layer top, other each, each layers of casing are disassembled with the connecting bolt in face, after checking that confirmation does not have connecting bolt, in casing, water filling reduces differential water pressures inside and outside casing, progressively all inner supports are all removed from bottom to up along with water level rises gradually, treat there is no differential water pressures inside and outside casing, start to remove casing: whole casing divides four dismountings, each dismounting elemental area, interim connecting angle (21) crane in the face that the face for removing must be connected with this dismounting face during dismounting passes through the wire rope of bolt on angle steel (21) before and slings until angle steel (21) departs from casing completely from bottom to up one by one, after angle steel (21) departs from casing, wire rope on bolt on the suspension ring of this elemental area, crane hangs this elemental area by wire rope, remove other connecting bolts in this elemental area and adjacent cells face, remove the connection in this elemental area and adjacent cells face, this elemental area is made to become independent face, be connected without any with other elemental areas, with crane, this elemental area is hung on the bank, remove one by one with same way other elemental areas by casing.
8. one according to claim 7 detachably recycles the construction method of bottomless steel jacket box (1), it is characterized in that: described step (10) is toward reinforced plastic water container (20) inner water filling, if still can not sink after filling water, then vibrate reinforced plastic water container (20) with vibrating hammer, until steel jacket box (1) sinks down into design attitude.
9. one according to claim 8 detachably recycles the construction method of bottomless steel jacket box (1), it is characterized in that: the described interim bracket (15) of described step (5) is arranged on the steel pipe pile (10) of drilling platform (18) outermost, interim bracket adopts i iron, is fixed by welding on the steel pipe pile of outermost; When described step (8) is assembled, the connecting sewing place of casing adopts 8-10mm rubber tile to make collision mat, adopts atomized ash to carry out reinforcement shutoff with cotton-wool in the place of right-angled intersection seam.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN105332382A (en) * | 2015-10-29 | 2016-02-17 | 成都华川公路建设集团有限公司 | River-adjacent-foundation-pit island-building cofferdam clay sealing construction method |
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| CN107237266A (en) * | 2017-06-27 | 2017-10-10 | 中铁第四勘察设计院集团有限公司 | Open cut rock anchor combination foundation and its inverse operation construction method |
| CN108867672A (en) * | 2018-08-24 | 2018-11-23 | 中国建筑第四工程局有限公司 | A kind of Double-Wall Steel Boxed Cofferdam joining method |
| CN111533034A (en) * | 2020-05-18 | 2020-08-14 | 段中华 | Lifting device of large-scale hoisting equipment and method for disassembling large-scale hoisting equipment |
| CN111809646A (en) * | 2020-08-07 | 2020-10-23 | 中交路桥华东工程有限公司 | Connecting device for steel sleeve box and concrete bearing platform and construction process |
| CN113863355A (en) * | 2021-10-18 | 2021-12-31 | 中电建十一局工程有限公司 | Waterproof construction method for large-volume bearing platform in water |
| CN113863355B (en) * | 2021-10-18 | 2023-02-24 | 中电建十一局工程有限公司 | Waterproof construction method for large-volume bearing platform in water |
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