CN109518705A - A kind of steel sheet pile and film bag sand combined cofferdam construction method - Google Patents
A kind of steel sheet pile and film bag sand combined cofferdam construction method Download PDFInfo
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- CN109518705A CN109518705A CN201811393445.5A CN201811393445A CN109518705A CN 109518705 A CN109518705 A CN 109518705A CN 201811393445 A CN201811393445 A CN 201811393445A CN 109518705 A CN109518705 A CN 109518705A
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- steel sheet
- sheet pile
- cofferdam
- sand
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/10—Placing gravel or light material under water inasmuch as not provided for elsewhere
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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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The present invention provides a kind of steel sheet pile and film bag sand combined cofferdam construction method, including the finishing of surveying setting-out, original bed, the side Wai Jiang underwater dumped rockfill, hydraulic reclamation medium coarse sand, steel sheet pile construction, film bag sand presser feet, setting Counter-pulled bolts and cofferdam pre-shaping step.Compared to existing cofferdam construction method, steel sheet-pile cofferdam is combined with the advantage in film bag sand cofferdam, form steel sheet pile and film bag sand combined cofferdam with double dominant, securely, stable, security performance is good；Hydraulic reclamation medium coarse sand makes land operation platform, greatly reduced difficulty of construction and construction cost, reduces the duration；It is thorough that work progress considers, the equating of cofferdam construction region and outer river side throwing stone presser feet ensure that the reliability of cofferdam construction and the stability of later period operation before hydraulic fill sand；Influence of the deep basal pit to cofferdam in construction in later period is considered in work progress, ensure that the force stability in cofferdam.
Description
Technical field
The present invention relates to cofferdam construction technical fields, specifically, being to be related to a kind of steel sheet pile and film bag sand combined cofferdam
Construction method.
Background technique
Currently, conventional cofferdam mode has earth rock cofferdam, steel sheet-pile cofferdam, crib cofferdam, reinforced concrete sheeting cofferdam
Deng still, conventional cofferdam mode is unable to reach very in terms of applicability, construction cost, construction period and cofferdam
Good effect, especially when encountering the riverbed with certain slope, conventional cofferdam mode difficulty of construction is larger and quality is difficult to control
System, when using steel sheet-pile cofferdam mode, inclination landform in riverbed will lead to steel sheet pile and be increased by lateral pressure, be unfavorable for the cofferdam Wai Jiang
Stabilization, this is also frequently problem in coffering.The cofferdam such as deep basal pit, deep-water hole and complicated geology are applied
During work, if technology controlling and process is not in place, it is easy to the major accidents such as infiltration, cofferdam deformation occur, directly to construction safety
It impacts, while also largely seriously restricting the duration and increasing cost.Moreover, it is well known that, cofferdam construction exists
It is carried out compared with directly carrying out in water under terrestrial environment, difficulty of construction is larger with cost disparities, how by cofferdam construction ring
It is also particularly important that border, which is changed into terrestrial environment construction,.
Summary of the invention
To solve the above-mentioned problems, the object of the present invention is to provide a kind of riverbeds that is applicable to of three row's two-stages to tilt, surely
Qualitative good, based on terrestrial environment construction steel sheet pile and film bag sand combined cofferdam construction method.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of steel sheet pile and film bag sand combined cofferdam construction method, include the following steps:
A. riverbed is modified: by the cleaning of original bed surface layer mud, leveling, second will be set up in advance on riverbed using hook machine waterborne,
Unified elevation is trimmed in place of third row's steel sheet pile；
B. the side Wai Jiang underwater dumped rockfill: jackstone presser feet is carried out in place of outer river is surveyed and sets up first row steel sheet pile in advance；
C. hydraulic reclamation medium coarse sand: filling medium coarse sand, so that setting up in place of second, third row's steel sheet pile hydraulic reclamation medium coarse sand in advance to river
More than face it is not less than 1 meter of height, to constitute land operation platform；
D. steel sheet pile construction: to steel sheet pile construction on the land operation platform that medium coarse sand is constituted, the side Wai Jiang the is first set up
One row's steel sheet pile is washed outer shifting to reduce back-up sand, then construct second row and third row's steel sheet pile；
E. film bag sand presser feet: side is gushed in third steel sheet pile and is handled using film bag sand presser feet；
F. Counter-pulled bolts are arranged: installation Counter-pulled bolts correct drawing to first, second, third row's steel sheet pile；
G. cofferdam is modified: steel sheet pile fore shaft processing, water-proofing treatment.
Further, in the step b, using stone dumper construct jackstone presser feet, jackstone presser feet it is highly-filled to river surface with
Lower 3.5 meters.
Further, in the step d, before steel sheet pile construction, in the land operation platform that the hydraulic fill sand is constituted
Upper berth pading plate prevents from collapsing.
Further, in the step d, when splicing steel sheet pile, both ends steel sheet pile will be held on firmly to just holding out against
Welding in fixture, it is desirable that gap is not more than 3mm between two steel sheet pile ends, and the dislocation on section is not more than 2mm, the steel sheet pile of splicing
Both ends are concordant, and error is not more than 3mm, and steel sheet pile group is unanimous between the higher and lower levels, and error is not more than 30mm；Whole locks of steel sheet pile apply
Upper waterproof mixing material, keeps the filleting of fore shaft tight.
Further, in the step d, to guarantee that steel sheet pile is vertical, the guiding steel plate in the support of cofferdam is fixed in setting
Stake keeps steel plate stake body vertical along guiding steel sheet pile underthrust, reinforces measurement work and adjusts in time, makes steel sheet pile along cofferdam
The gradient of peripheral direction and its vertical direction is no more than 5 ‰.
Compared with prior art, a kind of steel sheet pile of the present invention and film bag sand combined cofferdam construction method, have following advantage:
(1) by the way of steel sheet pile and film bag sand combined cofferdam, sufficiently by the excellent of steel sheet-pile cofferdam and film bag sand cofferdam
Gesture combines, and forms steel sheet pile and film bag sand combined cofferdam with double dominant, and securely, stable, security performance is good.
(2) using first hydraulic fill sand method, land operation platform is first filled in, realizes that over-water construction steel sheet pile becomes land construction steel
The cost of sheet pile, land construction steel sheet pile reduction is far longer than the increased cost of hydraulic fill sand, realizes maximization of economic benefit, simultaneously
It greatly reduced difficulty of construction, reduce the duration.
(3) work progress considers thorough, protects the equating of cofferdam construction region and outer river side throwing stone presser feet before hydraulic fill sand
The reliability of cofferdam construction and the stability of later period operation are demonstrate,proved.
(4) influence of the deep basal pit to cofferdam in construction in later period is considered in work progress, ensure that the stability under loading in cofferdam
Property.
Detailed description of the invention
Fig. 1 is the engineering schematic diagram of a kind of steel sheet pile of the present invention and film bag sand combined cofferdam construction method；
Fig. 2 is the original bed finishing schematic diagram of a kind of steel sheet pile of the present invention and film bag sand combined cofferdam construction method；
Fig. 3 is the side the Wai Jiang underwater dumped rockfill schematic diagram of a kind of steel sheet pile of the present invention and film bag sand combined cofferdam construction method；
Fig. 4 is the hydraulic reclamation medium coarse sand schematic diagram of a kind of steel sheet pile of the present invention and film bag sand combined cofferdam construction method；
Fig. 5 is the steel sheet pile construction schematic diagram of a kind of steel sheet pile of the present invention and film bag sand combined cofferdam construction method.
In figure: 1, jackstone presser feet, 2, land operation platform, 3, first row steel sheet pile, 4, second row steel sheet pile, 5, third row
Steel sheet pile, 6, film bag sand presser feet, 7, Counter-pulled bolts, 8, packing sedimentation by throwing stones.
Specific embodiment
It should be noted that in the absence of conflict, technical characteristic in the embodiment of the present invention and embodiment can be with
It is combined with each other, it is within the scope of the present invention.In addition, for ease of description, step number, but this has been used below
It should not be construed as limiting the invention.
Embodiment 1
The present embodiment by the present invention be applied to the three of Guangzhou Nansha District gush the western cofferdam Wai Jiang for.As shown in Figure 1,
The three original place shapes for gushing Jiang Weiyanshigongchu outside west are that the outside river 1:3~1:5.5 rolls tiltedly, if directlying adopt film bag sand cofferdam, are applied
Work difficulty is larger, and quality is difficult to control, and gushes Jiang Weiyanshigongchu outside west according to direct over-water construction steel sheet-pile cofferdam, three
Primary dip landform will lead to steel sheet pile and be increased by lateral pressure, be unfavorable for the stabilization in the cofferdam Wai Jiang, and outside is being constructed in cofferdam
Deep basal pit is had in the process, and height difference is more than 5m, and cofferdam stress condition and stability need emphasis to consider.Based on such engineering construction
Needs, the invention proposes a kind of cofferdam construction methods, include the following steps:
A. riverbed is modified: by the cleaning of original bed surface layer mud, leveling, second row will be set up in advance on riverbed using hook machine waterborne
Unified elevation is trimmed in place of steel sheet pile 4, third row's steel sheet pile 5；
B. the side Wai Jiang underwater dumped rockfill: jackstone presser feet 1 is carried out in place of outer river is surveyed and sets up first row steel sheet pile 3 in advance；
C. hydraulic reclamation medium coarse sand: filling medium coarse sand, so that setting up second row steel sheet pile 4, third row's 5 place hydraulic reclamation of steel sheet pile in advance
More than medium coarse sand to river surface it is not less than 1 meter of height, to constitute land operation platform 2；
D. steel sheet pile construction: to steel sheet pile construction on the land operation platform 2 that medium coarse sand is constituted, the side Wai Jiang the is first set up
One row's steel sheet pile 3 is washed outer shifting to reduce back-up sand, then construct second row steel sheet pile 4 and third row's steel sheet pile 5；
E. side film bag sand presser feet 6: is gushed in third row's steel sheet pile 5 using the processing of film bag sand presser feet 6；
F. Counter-pulled bolts are arranged: installation Counter-pulled bolts 7 arrange steel plate to first row steel sheet pile 3, second row steel sheet pile 4, third
Stake 5 correct to drawing；
G. cofferdam is modified: steel sheet pile fore shaft processing, water-proofing treatment.
In work progress, the finishing of step a original bed is as shown in Fig. 2, according to the position that three row's steel sheet piles are installed, to original bed
It is modified, wherein 4 meters are spaced between first row steel sheet pile 3 and second row steel sheet pile 4, second row steel sheet pile 4 and third arrange steel
It is spaced 6 meters between sheet pile 5, will be trimmed at the original bed between second row steel sheet pile 4 and third row's steel sheet pile 5 lower than river surface 4
The unified elevation of rice.
Step b Wai Jiang side underwater dumped rockfill as shown in figure 3, jackstone presser feet 1 position first row steel sheet pile position outer river
The packed height of jackstone presser feet 1 is filled to lower than 3.5 meters of river surface using stone dumper, is washed out by river water with reducing hydraulic reclamation sand by side
River slides outward with hydraulic reclamation sand is prevented.
Step c hydraulic reclamation medium coarse sand is built for the construction of steel sheet pile as shown in figure 4, hydraulic reclamation medium coarse sand makes land operation platform 2
If land environment operation platform, using Sand blowing ship by medium coarse sand hydraulic reclamation from original bed finishing place at jackstone presser feet 1, it is thick in hydraulic reclamation
Height after sand is compacted to medium coarse sand is no less than one meter still above river surface, arranges 5 position of steel sheet pile in second row steel sheet pile 4 and third
It adds steel plate and medium coarse sand is flattened into compacting, make firm land operation platform 2.
After step d steel sheet pile construction is as shown in figure 5, hydraulic reclamation medium coarse sand makes land operation platform 2, by ready steel plate
Stake is spliced, and when splicing steel sheet pile, both ends steel sheet pile will be held on welding in firm fixture to just holding out against, it is desirable that two steel
Gap is not more than 3mm between sheet pile end, and the dislocation on section is not more than 2mm, and concordant to the steel sheet pile both ends of spelling, error is not
Greater than 3mm, steel sheet pile group is unanimous between the higher and lower levels, and error is not more than 30mm, and all lock is intended to coat waterproof mixing material, makes fore shaft
Filleting it is tight；Match stake in advance before carrying out pitching pile, in transport, storage, roll into a ball heap by pitching pile sequence, press when pitching pile as defined in
Sequence hang it is slotting, for guarantee pitching pile smoothly close up, it is desirable that pile body is vertical, and the steel plate number on cofferdam periphery will be divided equally, for guarantee stake
Body is vertical, and the guiding steel sheet pile being fixed in the support of cofferdam is set in first row steel sheet pile 3, along guiding steel sheet pile underthrust, makes first
Row's 3 pile body of steel sheet pile is vertical, and since width is not quite identical above and below steel sheet pile stake group, fore shaft gap is also not quite identical, pile body
It is possible to inclination should be reinforced measuring work in construction, discovery inclination adjusts in time, makes every group of steel sheet pile along cofferdam week
The gradient of edge direction and its vertical direction is no more than 5 ‰；When carrying out the inserting piling of steel sheet pile, it is necessary to stake be installed on pile top
Cap never hammers too quickly in order to avoid bookbinding destroys, in order to avoid pile top twists, causes pile pulling difficult, when the verticality of steel sheet pile is preferable,
Once steel sheet pile is got to and requires depth, when verticality is poor, injection is carried out in two times, i.e., first squeeze into all stakes about
After half depth, then getting to for the second time depth is required, for the stability and safety for guaranteeing cofferdam, first row steel sheet pile 3 is long
12 meters, at inserting piling to river surface, 4 a length of 18 meters of second row steel sheet pile, more than inserting piling to river surface 3 meters, third arranges steel sheet pile 5 long 18
Meter, more than inserting piling to river surface 2 meters, wherein the steel sheet pile gross weight 257.7t of steel sheet pile the gross weight 735t, long 12m of long 18m.
In step e film bag sand presser feet 6, side is gushed in third row's steel sheet pile 5, advanced packing sedimentation by throwing stones 8 prevents sedimentation from making to enclose
Weir bad stability, jackstone filling thickness are 1 meter, and length is 10 meters, then arrange steel to third on jackstone using film bag sand
The processing of 5 presser feet of sheet pile, highly-filled to 0.5 meter below river surface of film bag sand.
It should be noted that in the work progress of a kind of steel sheet pile of the present invention and film bag sand combined cofferdam construction method,
The problem of being likely encountered and processing mode are as follows:
1. being tilted when inserting piling steel sheet pile
Processing mode:
(1) it before inserting piling steel sheet pile, in addition to being coated with frictional resistance of the lubricating oil to reduce fore shaft in fore shaft, while inserting
Iron wedge or hard-wood wedge are squeezed into the fore shaft lower end of set, silt blocking fore shaft when preventing from sinking to；
(2) inclination of steel sheet pile is corrected using polyspast group；
(3) plus shaped pile is rectified a deviation；
(4) it pulls out and beats again (especially first pile).
2. steel sheet pile fore shaft leak
Processing mode:
Steel sheet pile due to inserting piling is improper or under Water And Earth Pressures fore shaft deform, expansion joint (E.J.), leak.Its remedial measure
It is on the inside of the cofferdam at leak fore shaft with cotton-wool stuff up a crack, while can be aided in the water of outside that shed sawdust flyash, slag etc. stifled
Leakage in the more anxious water of water flow, on the outside of cofferdam wraps up colour bar cloth leak stopping object is prevented to be washed and wash in a pan away.
It is noted that the present embodiment three gushes the scheme phase of river cofferdam construction and conventional over-water construction steel sheet pile outside west
Than shortening the construction period about 43 days, saving about 100.633 ten thousand yuan of expense, improve the entity quality and economic benefit in cofferdam, have good
Good social benefit and application prospect.
Certainly, above-described embodiment is only the preferred embodiment of the present invention, and when practical application, there are also more by the present invention
Change, for example, the distance between the quantity of steel sheet pile, steel sheet pile, film bag sand presser feet height etc., can use ring according to different
Different schemes is designed in border, and suchlike obvious equivalence changes also should include the protection in the claims in the present invention
In range.
Claims (5)
1. a kind of steel sheet pile and film bag sand combined cofferdam construction method, which is characterized in that the combined cofferdam construction method is
Three row's two-stage steel sheet-pile cofferdams, specifically comprise the following steps:
A. riverbed is modified: by the cleaning of original bed surface layer mud, leveling, will set up in advance second, third on riverbed using hook machine waterborne
Unified elevation is trimmed in place of row's steel sheet pile；
B. the side Wai Jiang underwater dumped rockfill: jackstone presser feet is carried out in place of outer river is surveyed and sets up first row steel sheet pile in advance；
C. hydraulic reclamation medium coarse sand: filling medium coarse sand so that set up in place of second, third row's steel sheet pile in advance hydraulic reclamation medium coarse sand to river surface with
The upper height not less than 1 meter, to constitute land operation platform；
D. steel sheet pile construction: to steel sheet pile construction on the land operation platform that medium coarse sand is constituted, the side Wai Jiang first row is first set up
Steel sheet pile is washed outer shifting to reduce back-up sand, then construct second row and third row's steel sheet pile；
E. film bag sand presser feet: side is gushed in third steel sheet pile and is handled using film bag sand presser feet；
F. Counter-pulled bolts are arranged: installation Counter-pulled bolts correct drawing to first, second, third row's steel sheet pile；
G. cofferdam is modified: steel sheet pile fore shaft processing, water-proofing treatment.
2. steel sheet pile according to claim 1 and film bag sand combined cofferdam construction method, which is characterized in that the step b
In, using stone dumper construct jackstone presser feet, highly-filled to 3.5 meters below river surface of jackstone presser feet.
3. steel sheet pile according to claim 1 and film bag sand combined cofferdam construction method, which is characterized in that the step d
In, before steel sheet pile construction, in the land operation platform upper berth pading plate that the hydraulic reclamation sand is constituted, prevent from collapsing.
4. steel sheet pile according to claim 1 and film bag sand combined cofferdam construction method, which is characterized in that the step d
In, when splicing steel sheet pile, both ends steel sheet pile will be held on welding in firm fixture to just holding out against, it is desirable that two steel sheet pile ends
Between gap be not more than 3mm, the dislocation on section is not more than 2mm, and the steel sheet pile both ends of splicing are concordant, and error is not more than 3mm, steel
Sheet pile group is unanimous between the higher and lower levels, and error is not more than 30mm；Whole locks of steel sheet pile coat waterproof mixing material, make the filleting of fore shaft
Tightly.
5. steel sheet pile according to claim 1 and film bag sand combined cofferdam construction method, which is characterized in that the step d
In, to guarantee that steel sheet pile is vertical, the guiding steel sheet pile in the support of cofferdam is fixed in setting, along guiding steel sheet pile underthrust, makes steel plate
Stake body is vertical, reinforces measurement work and adjusts in time, makes steel sheet pile in the inclination along cofferdam peripheral direction and its vertical direction
Degree is no more than 5 ‰.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811393445.5A CN109518705A (en) | 2018-11-21 | 2018-11-21 | A kind of steel sheet pile and film bag sand combined cofferdam construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811393445.5A CN109518705A (en) | 2018-11-21 | 2018-11-21 | A kind of steel sheet pile and film bag sand combined cofferdam construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115341561A (en) * | 2022-08-23 | 2022-11-15 | 深圳市市政工程总公司 | Water area cofferdam construction method |
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| CN115341561A (en) * | 2022-08-23 | 2022-11-15 | 深圳市市政工程总公司 | Water area cofferdam construction method |
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