CN105401586A - Construction method for bottomless steel jacket box capable of stopping water simply - Google Patents
Construction method for bottomless steel jacket box capable of stopping water simply Download PDFInfo
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- CN105401586A CN105401586A CN201510800117.2A CN201510800117A CN105401586A CN 105401586 A CN105401586 A CN 105401586A CN 201510800117 A CN201510800117 A CN 201510800117A CN 105401586 A CN105401586 A CN 105401586A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
- E02D5/08—Locking forms; Edge joints; Pile crossings; Branch pieces
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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Abstract
The invention provides a construction method for a bottomless steel jacket box capable of stopping water easily. The construction method comprises the following steps that 1, steel jacket box block sections are manufactured, specifically, the main bodies of the steel jacket box block sections are made of rectangular steel molding plates, a lock catch is welded to one side of each rectangular steel molding plate, and a lock head is welded to the other side of each rectangular steel molding plate; 2, the steel jacket box block sections are beaten in a shaking mode, and the steel jacket box is assembled by connecting the lock catches and the lock heads in a sleeving mode; 3, flexible hosepipes filled with slightly expansive cement paste is used as water-stop belts, and the spaces between the inner walls of the lock heads and the lock catches are totally sealed; 4, a first waling is installed in the steel jacket box; 5, water pumping is conducted, and a second waling is installed; and 6, desilting and bottom sealing are carried out.
Description
Technical field
The present invention relates to water Bridge construction field, be specifically related to a kind of method adopting bottomless steel jacket box to carry out bridge phytal zone substructure binder, column construction.
Background technology
In expressway construction, often run into bridge and pass through the shallow water works area such as lake, river, and ground mulching layer is the comparatively soft geological such as mud, clay, due to the restriction of geological conditions and construction cost, be not suitable for large area and build island, to bridge substructure binder, column construction, usually adopt steel sheet pile cofferdam construction.Steel sheet-pile cofferdam is that plurality of steel plates stake is connected at bridge substructure binder, column periphery inserted to play steel sheet pile, and seam crossing adopts certain way sealing, encloses out the space that is closed water; Water in cofferdam is extracted out, bottom desilting, builds bottom concrete, form the environment of anhydrous drying, be convenient to carry out binder, column construction.Therefore the key of steel sheet pile cofferdam construction be cofferdam close water effect, another problem is construction cost.A kind of mode conventional is at present Larsen steel sheet pile cofferdam construction.Steel sheet pile that typical Larsen steel sheet-pile cofferdam adopts connects and a sealing means, is that the both sides of each block plate stake are respectively equipped with U-shaped or Z-type limit, and two pieces of adjacent steel sheet piles are by U-shaped or Z-type socket, and seam crossing is smeared enough butter and carried out hermetic seal.But in practice of construction process, the stagnant water effect of Larsen steel sheet-pile cofferdam is unsatisfactory, often drainage is there is in pump process after forming cofferdam, usually need to adopt coarse sand, saw foam powder, cement to be in harmonious proportion, leak stopping conduit is set above outside the steel sheet pile that leaks, by leak stopping conduit leak stopping temper transferred to and need leak stopping place, the steel sheet pile that the inspirations such as coarse sand, saw foam powder, cement are leaked is connected in gap, strengthens stagnant water effect.In addition, adopt Larsen steel sheet pile costly, expend man-hour during construction more, add construction cost.
Summary of the invention
The object of the present invention is to provide the bottomless steel jacket box construction method that a kind of construction cost is low, installation rate is fast, stagnant water effect is good.
For achieving the above object, the present invention is by the following technical solutions:
A simple and easy bottomless steel jacket box construction method of closing water, is characterized in that, comprise the following steps:
(1) steel jacket box block section is made: described steel jacket box block section main body adopts rectangle steel template, at the side of rectangle steel template welding snap close, opposite side welding tapered end; Described snap close is the steel pipe that a length equals described steel form height, steel pipe walls is axially arranged with the opening passing through steel pipe walls along steel pipe; Described tapered end is the T-steel that a length equals described steel form height, and the thickness of T-steel web is less than the width of snap close upper shed, and flange width is less than the internal diameter of snap close;
(2) rapping steel jacket box block section, assembling steel jacket box: in the predetermined corner location arranging steel jacket box, rapping first steel jacket box block section, verticality, precision that top mark is high is controlled during rapping, after the rapping of first steel jacket box block section completes, vertically inserted by the tapered end of second steel jacket box block section in first steel jacket box block section snap close, rapping second steel jacket box block section is to design elevation; Install and all the other steel jacket box block sections of rapping according to aforesaid way, assembling encloses the steel jacket box that a cross section is rectangle;
(3) steel jacket box hermetic seal: adopt the flexible hose interior perfusion micro-expansion cement that length is greater than steel jacket box block section height, diameter is less than snap close pipe diameter to starch as waterstop, one end of flexible pipe is closed, Grouting Pipe is inserted from the other end, flexible pipe and Grouting Pipe are together inserted in snap close, synchronously transfer, on earth, start in flexible pipe, pour into micro-expansion cement slurry, Grouting Pipe marginal not slurry limit promotes, until be filled into snap close overhead height, the space between tapered end and snap close inwall seals by waterstop after perfusion micro-expansion cement is starched completely;
(4) make and install first waling: adopting the rectangular frame that section steel manufacture and described steel jacket box inner peripheral wall are coincide, the vertical rod of one and rectangular frame place plane orthogonal is respectively welded at four angles of rectangular frame, makes waling; First first waling is installed in steel jacket box, by four the angle vertically downward inserted to plays of four of waling vertical rods along steel jacket box, inserted to play to the top of first waling lower than steel jacket box top; Four limits of described waling push against the wall of described steel jacket box respectively;
(5) draw water and install second waling: after the installation of first waling, starting to extracardiac pumping in steel jacket box, time below second waling design elevation of drawing water, time-out draws water, and starts to install second waling; The shape of second waling and to install mode identical with first waling, the absolute altitude of second waling is positioned at below first waling absolute altitude;
(6) desilting, back cover: after the installation of second waling, continue to draw water, after being drained by the water in steel jacket box, start desilting bottom steel jacket box, and at least 0.2m below at the bottom of desilting to bridge column, binder, then builds steel jacket box bottom concrete.
The present invention adopts bulk steel form to make steel jacket box block section, and compared with common Larsen steel sheet-pile cofferdam, have easy for installation, speed of application is fast, closes the advantages such as water method is simple and easy, and stagnant water effect is good, and greatly reduces the cost of bridge substructure subaqueous construction.Be example with the bottomless steel jacket box of construct long by 3 × wide 10m, girth 26m, adopt the present invention and adopt effect of Larsen steel sheet pile and expense to contrast as follows:
One, work efficiency contrast:
(1) the present invention is adopted: each steel jacket box comprises 10 steel jacket box block sections, sets 1 day, and snap close is in the milk 0.5 day, and waling installs 1 day, and desilting, back cover complete for 2 days, within 4.5 days, completes altogether.
(2) Larsen steel sheet pile is adopted: Larsen IV steel sheet pile width 0.4m/ sheet, single long 9m, 65, each cofferdam, set 2 days time, waling installs 1 day, desilting, back cover 2 days, within 5 days, completes altogether.
Known by contrasting, adopt the present invention's steel jacket box can save 0.5 man-hour.
Two, expense contrast:
(1) expense of the present invention is adopted:
(2) expense of Larsen steel sheet pile is adopted:
Known by contrasting, adopt the present invention than the expense adopting Larsen steel sheet pile and save about 22330 yuan.
It is more than effect expense contrast of a construction bottomless steel jacket box.In an employing embody rule embodiment of the present invention, a grand bridge of construction, has binder 206 road, 412, column, and need the bottomless steel jacket box 206 of construction, calculate like this, man-hour and the expense of saving are considerable.If the present invention applies in this area, by the huge economic benefit of generation and social benefit.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention;
Fig. 2 is the plan view of steel jacket box block section;
Fig. 3 is a kind of top view of steel jacket box block section, latch openings towards the plane parallel with steel form;
Fig. 4 is the top view of another kind of steel jacket box block section, latch openings towards the plane orthogonal with steel form;
Fig. 5 is the top view after steel jacket box block section has set;
Fig. 6 is the steel jacket box structural representation after installing waterstop;
Fig. 7 is the enlarged drawing installing waterstop in snap close;
Fig. 8 is the structural representation of waling;
Fig. 9 is a lateral view of waling;
Figure 10 is the bottomless steel jacket box structural representation after installing waling.
Detailed description of the invention
It is the flow chart of the inventive method shown in Fig. 1.Detailed process is as follows:
(1) steel jacket box block section is made:
As shown in Figure 2, Figure 3, Figure 4, described steel jacket box block section 1 main body adopts rectangle steel template 2, at the side of the short transverse of rectangle steel template welding snap close 3, and opposite side welding tapered end 4; Described snap close 3 is steel pipes that a length is equal to or greater than described steel form height, steel pipe walls is axially arranged with the opening 5 passing through steel pipe walls along steel pipe; Described tapered end 4 is T-steels that a length is equal to or greater than described steel form height, or the component of similar T-steel, and the thickness of T-steel web is less than the width of snap close upper shed, and flange width is less than the internal diameter of snap close steel pipe.
Steel form 2 adopts steel plate to be panel, and one side arranges vertical and horizontal reinforcing rib 6, and another side can weld the steel plate of at least one piece of longitudinal direction as clamping plate 7.
Insert riverbed when setting for ease of steel jacket box block section, the groove shape sword pin of more than 0.3m can be set bottom steel form.
Welding snap close 3 time, according to assembling steel jacket box needs, by part snap close 3 steel pipe opening 5 towards being set to the plane parallel with steel form, as shown in 3; Or be set to the plane orthogonal of opening 5 and steel form, as shown in Figure 4.
(2) rapping steel jacket box block section, assembling steel jacket box:
In the predetermined corner location arranging steel jacket box, rapping first steel jacket box block section, steel jacket box block section verticality, precision that top mark is high is controlled during rapping, after the rapping of first steel jacket box block section completes, vertically inserted by the tapered end of second steel jacket box block section in first steel jacket box block section snap close, rapping second steel jacket box block section is to design elevation; Install and all the other steel jacket box block sections of rapping according to aforesaid way, enclose the steel jacket box that a cross section is rectangle; The steel jacket box assembled as shown in Figure 5.
(3) waterstop is installed, carries out steel jacket box hermetic seal:
As shown in Figure 6, Figure 7, the flexible hose inside perfusion micro-expansion cement that length is greater than steel jacket box block section height, diameter is less than snap close pipe diameter is adopted to starch as waterstop 8, one end of flexible pipe is closed, Grouting Pipe is inserted from the other end, flexible pipe and Grouting Pipe are together inserted in snap close, synchronously transfer, on earth, start in flexible pipe, pour into micro-expansion cement slurry, Grouting Pipe marginal not slurry limit promotes, until be filled into snap close overhead height, the space between tapered end 4 and snap close 3 inwall seals by waterstop 8 after perfusion micro-expansion cement is starched completely.
(4) make and first waling and support be installed:
The structure of waling 9 as shown in Figure 8, Figure 9.Adopt the rectangular frame that section steel manufacture and described steel jacket box inner peripheral wall are coincide, the vertical rod 10 of one and rectangular frame place plane orthogonal is respectively welded at four angles of rectangular frame, forms waling.When making waling, can at rectangular frame horizontally set twice support bar 11, weld hound 12 respectively at rectangular frame four angles, hound and rectangular frame limit form the equilateral right-angled triangle of angle 45 degree.First in steel jacket box, install first waling, by four the angle vertically downward inserted to plays of four of waling vertical rods along steel jacket box, inserted to play lower than steel jacket box top, and makes four limits of waling push against the wall of steel jacket box respectively to the top of first waling.Steel jacket box structure after waling is installed as shown in Figure 10.
(5) draw water and second waling be installed: after the installation of first waling, starting to extracardiac pumping in steel jacket box, second waling design elevation of drawing water with time, time-out draws water, and starts to install second waling; The shape of second waling and to install mode identical with first waling, the absolute altitude of second waling is positioned at below first waling absolute altitude;
(6) desilting, back cover: after the installation of second waling, continue to draw water, after in steel jacket box, water is drained, start desilting in steel jacket box, below 0.2m at the bottom of desilting to bridge column, binder, then builds bottom concrete.
Adopt Specific construction embodiment of the present invention below in conjunction with one, method of the present invention is further described.
The present embodiment adopts method of the present invention to construct to a grand bridge substructure.
Construction bridge bridge location engineering geology is mud, sand ovum layer, silty clay, severely-weathered ~ middle weathering argillaceous siltstoue, and silt depth is at 1.8m ~ 13.4m.Stratum, binder place is grey stream plasticity mud, and have the feature of low bearing capacity and high-compressibility, permeability is poor, is weak water permeability, cohesion 9.7KPa, angle of internal friction 6.8 degree.
Bridge is that Single row pillars connects binder and connects pillar construction, and binder embeds riverbed, therefore binder and column are subaqueous construction, adopt bottomless steel boxed cofferdam.The wide 1m of binder, high 1.3m, column diameter 1.4m, high 14m.Binder 206 road of the same type, 412, column.
Normal construction depth of water 2m in season, steel jacket box design height 6m, according to the above 0.5m of the water surface, depth of water 2m, embedded depth 3.5m, desilting degree of depth 1.0m, back cover thickness 0.2m constructs.
Steel boxed cofferdam design size is long 3 × wide 10m, girth 26m.The steel jacket box block section of 8 pieces of 6 × 2.5m, 2 pieces of 6 × 3m is adopted to form.
First steel jacket box block section is made.Steel jacket box block section main body is the steel form of bulk.Steel form adopts 6mm steel plate to be panel, and one side arranges vertical and horizontal reinforcing rib, and another side can weld the steel plate of at least one piece of longitudinal direction as clamping plate, arranges 0.5m groove shape sword pin bottom steel form.Waling adopts 10# i iron, and cross reinforcing adopts 8# channel-section steel, and adopts ∠ 100 × 100 × 10 angle steel for splicing muscle.
Along steel form short transverse both sides, side welding snap close, opposite side welding tapered end.Snap close adopts diameter phi 160mm, wall thickness 8mm steel pipe, along steel shaft to offering the opening passing through steel pipe walls in steel pipe walls; Tapered end adopts T-steel or class T-steel, and as cut open in the middle of H profile steel or i iron, the thickness of T-steel web should be less than the width of snap close upper shed, and flange width should be less than the internal diameter of snap close steel pipe.Snap close and tapered end adopt the two-sided full weld of carbon-dioxide arc welding to weld with steel form.During welding snap close, according to the needs of assembling steel jacket box, being oriented and the plane parallel of steel form or vertical of latch openings is set.
Through above-mentioned operation, steel jacket box block section completes.Then prepare in stake position periphery rapping steel jacket box block section, construction steel precast-boxed cofferdam.Carry out setting-out with total powerstation to direction peg, after direction peg has set, install leading truck, strict sideline and the absolute altitude controlling leading truck, guarantees the accurate positioning of steel jacket box block part.
Adopt the cooperation of 50t crawler belt, DZ60 type vibrating hammer manually to carry out steel jacket box block section to set with assembled.First in the predetermined corner location arranging steel jacket box, rapping first steel jacket box block section.Lift vibrating hammer with crawler crane, vibrating hammer clamps steel jacket box block section, and human assistance is in place.Control when setting that steel jacket box block section plan-position, top mark are high, the precision of the verticality in side and front etc.After the rapping of first steel jacket box block section completes, vertically inserted by the tapered end of second steel jacket box block section in first steel jacket box block section snap close, rapping second steel jacket box block section is to design elevation; Install and all the other steel jacket box block sections of rapping according to aforesaid way, until the closure of whole steel jacket box.
The sealing performance of steel jacket box is that the present invention is successfully crucial.
Adopt diameter 15cm, length is greater than the flexible hose of steel jacket box block section height, the flexible pipe of similar fire hose and so on, inner perfusion micro-expansion cement slurry is as waterstop, one end of flexible pipe is closed, Ф 40mm Grouting Pipe is inserted from the other end, flexible pipe and Grouting Pipe are together inserted in snap close, synchronously transfer, on earth, start in flexible pipe, pour into micro-expansion cement slurry, Grouting Pipe marginal not slurry limit promotes, until be filled into snap close overhead height, the space between tapered end and snap close seals by waterstop after perfusion micro-expansion cement is starched completely.
The present invention has carried out test of many times according to cement slurry property and stagnant water effect, determines that micro-expansion cement slurry match ratio is: cement: swell soil: expansion agent: water=1:3.3:0.5:6.7 is low-intensity height circulating water mud; Said ratio is weight ratio.Before perfusion, first adopt high-pressure hydraulic pump to rinse in snap close, ensure in snap close unobstructed, wall body is without folder mud.
After steel jacket box closure, waterstop sealing, for ensureing the firm of steel jacket box, in steel jacket box, waling is installed.The waling similar of the waling structure that the present invention adopts and common Larsen steel sheet-pile cofferdam.
[rectangular frame that 16 channel-section steel welding one coincide with described steel jacket box inner peripheral wall, the vertical rod of one and rectangular frame place plane orthogonal is respectively welded at four angles of rectangular frame, and 0.5m groove shape sword pin is established in vertical rod lower end to adopt Two bors d's oeuveres.Waling laterally can arrange twice Two bors d's oeuveres, and [16 channel steel support bars, corner arranges Two bors d's oeuveres, and [16 channel-section steel hounds form the equilateral right-angled triangle of angle 45 degree.Each snap close steel jacket box arranges twice waling.First is apart from steel jacket box top 0.3m, and second is apart from first 1.8m.
By four the angle vertically downward inserted to plays of four of first waling vertical rods along steel jacket box, inserted to play is to the elevation of top of first waling apart from steel jacket box top 0.3m; Four limits of waling are made to push against the wall of steel jacket box respectively.
After installing first waling, carry out drawing water in cofferdam, draw water 0.3m to second waling absolute altitude, arranges second waling, then continues to draw water at the bottom of riverbed.Desilting adopts grab jaw to coordinate giant to construct, and 0.2m below at the bottom of desilting to binder, removes foreign material, drain the water away, carry out back cover.
Bottom concrete adopts C25 concrete, adopts primary concreting by ordinary concrete, i.e. tank car transport, crane coordinate suspension bucket blanking, and vibrating spear vibrates, and back cover thickness is 0.2m.
For preventing concrete from sinking in casting process, formerly can lay bamboo fence in bottom, then building bottom concrete.
When bottom concrete intensity reaches more than 90%, first labor cleaning's pile crown, then cuts pile crown to being bottom elevation, construction binder, column.
After binder, column have been constructed, steel jacket box can be removed.
Contrary when steel jacket box dismounting order and installation, first to water filling in casing, second waling is removed, then when drawing water in casing to first waling absolute altitude, remove first waling, remove fore shaft waterstop, then steel jacket box block section block-by-block is pulled out.
Steel jacket box block section is pulled out and is adopted 50t crawler crane to coordinate DZ60 type vibrating hammer, shakes while pull out, at the uniform velocity pulls out.
Claims (10)
1. a simple and easy bottomless steel jacket box construction method of closing water, is characterized in that, comprise the following steps:
(1) steel jacket box block section is made: described steel jacket box block section main body adopts rectangle steel template, at the side of rectangle steel template welding snap close, opposite side welding tapered end; Described snap close is the steel pipe that a length equals described steel form height, steel pipe walls is axially arranged with the opening passing through steel pipe walls along steel pipe; Described tapered end is the T-steel that a length equals described steel form height, and the thickness of T-steel web is less than the width of snap close upper shed, and flange width is less than the internal diameter of snap close;
(2) rapping steel jacket box block section, assembling steel jacket box: in the predetermined corner location arranging steel jacket box, rapping first steel jacket box block section, verticality, precision that top mark is high is controlled during rapping, after the rapping of first steel jacket box block section completes, vertically inserted by the tapered end of second steel jacket box block section in first steel jacket box block section snap close, rapping second steel jacket box block section is to design elevation; Install and all the other steel jacket box block sections of rapping according to aforesaid way, assembling encloses the steel jacket box that a cross section is rectangle;
(3) steel jacket box hermetic seal: adopt the flexible hose inside perfusion micro-expansion cement that length is greater than steel jacket box block section height, diameter is less than snap close pipe diameter to starch as waterstop, one end of flexible pipe is closed, Grouting Pipe is inserted from the other end, flexible pipe and Grouting Pipe are together inserted in snap close, synchronously transfer, on earth, start in flexible pipe, pour into micro-expansion cement slurry, Grouting Pipe marginal not slurry limit promotes, until be filled into snap close overhead height, the space between tapered end and snap close inwall seals by waterstop after perfusion micro-expansion cement is starched completely;
(4) make and first waling is installed: make and first waling is installed: adopting the rectangular frame that section steel manufacture and described steel jacket box inner peripheral wall are coincide, the vertical rod of one and rectangular frame place plane orthogonal is respectively welded at four angles of rectangular frame, makes waling; First first waling is installed in steel jacket box, by four the angle vertically downward inserted to plays of four of waling vertical rods along steel jacket box, inserted to play to the top of first waling lower than steel jacket box top; Four limits of described waling push against the wall of described steel jacket box respectively;
(5) draw water and install second waling: after the installation of first waling, starting to extracardiac pumping in steel jacket box, time below second waling design elevation of drawing water, time-out draws water, and starts to install second waling; The shape of second waling and to install mode identical with first waling, the absolute altitude of second waling is positioned at below first waling absolute altitude;
(6) desilting, back cover: after the installation of second waling, continue to draw water, after being drained by the water in steel jacket box, start desilting bottom steel jacket box, and at least 0.2m below at the bottom of desilting to bridge column, binder, then builds steel jacket box bottom concrete.
2. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, is characterized in that further comprising the steps:
(7) when bottom concrete intensity reaches more than 90%, cleaning column pile crown, then cuts pile crown to being bottom elevation, construction binder, column.
3. simple and easy bottomless steel jacket box construction method of closing water according to claim 2, is characterized in that further comprising the steps:
(8), after binder, column have been constructed, start to remove steel jacket box; Contrary when steel jacket box dismounting order and installation, under being first filled to second waling absolute altitude in casing, second waling is removed; When being filled to first waling absolute altitude again in casing, remove first waling; Then remove waterstop in fore shaft, finally steel jacket box block section block-by-block is extracted.
4. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, it is characterized in that: when making steel jacket box block section in described step (1), in steel form one side, vertical and horizontal reinforcing rib is set, another side longitudinal measure at least one clamping plate.
5. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, is characterized in that: snap close and tapered end adopt the two-sided full weld of carbon-dioxide arc welding to weld with steel form.
6. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, is characterized in that: welding snap close time, by snap close steel pipe opening towards being set to and the plane parallel of steel form or vertical.
7. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, is characterized in that: the groove shape sword pin being provided with more than 0.3m bottom described steel jacket box block section.
8. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, it is characterized in that: the micro-expansion cement slurry match ratio adopted in described step (3) is: cement: swell soil: expansion agent: water=1:3.3:0.5:6.7, described match ratio is weight ratio.
9. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, it is characterized in that: when making waling in described step (4), at rectangular frame horizontally set twice support bar, weld hound respectively at rectangular frame four angles, hound and rectangular frame limit form the equilateral right-angled triangle of angle 45 degree.
10. simple and easy bottomless steel jacket box construction method of closing water according to claim 1, is characterized in that: in described step (6), before building bottom concrete, first bottom steel jacket box, lays bamboo fence, then builds bottom concrete.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677872A (en) * | 2018-06-13 | 2018-10-19 | 中铁十六局集团第三工程有限公司 | The changeover portion template sealing component and construction method that binder assembles in a kind of suitable water |
| CN109371963A (en) * | 2018-11-16 | 2019-02-22 | 中铁上海工程局集团有限公司 | Back taper steel jacket box and its construction method in water in the prefabricated constructing tie beam of pier foundation |
| CN112031006A (en) * | 2020-08-22 | 2020-12-04 | 山东东泰工程咨询有限公司 | Connecting structure and connecting method for underwater steel jacket box |
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| CN109371963A (en) * | 2018-11-16 | 2019-02-22 | 中铁上海工程局集团有限公司 | Back taper steel jacket box and its construction method in water in the prefabricated constructing tie beam of pier foundation |
| CN112031006A (en) * | 2020-08-22 | 2020-12-04 | 山东东泰工程咨询有限公司 | Connecting structure and connecting method for underwater steel jacket box |
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