CN108589543A - The construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology - Google Patents
The construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology Download PDFInfo
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- CN108589543A CN108589543A CN201810454572.5A CN201810454572A CN108589543A CN 108589543 A CN108589543 A CN 108589543A CN 201810454572 A CN201810454572 A CN 201810454572A CN 108589543 A CN108589543 A CN 108589543A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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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Abstract
The invention discloses a kind of construction methods for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology, including river to be in the first stage construction of lowstand period：First manually builds island, excavation pit, draws water；Again in steel plate pile concrete locating piece of the bottom of foundation ditch installation with pairs of guide post；The inside and outside circuit of welding H-bar composition is socketed inside and outside positioning steel tube, and welded limiting steel ring, installing bottom layer waling and inner support in inside and outside guide post；Then installation steel sheet pile after being connected and fixed steel sheet pile and bottom waling, removes interior positioning steel tube to joining the two sections of a bridge, etc；First segment steel pile casting and assembly connection system are installed, carry out the dry envelope of bed course later, removes outer positioning steel tube and limit collar tie beam thereon；Then second stage construction is carried out：Other layer of waling and inner support are installed, connect high first segment steel pile casting, and set up drilled pile platform, completes construction.Present invention utilizes the convenience of lowstand period, short construction period, precision height, stabilized structures.
Description
Technical field
The present invention relates to foundation construction technical fields in bridge water, and island steel is built suitable for formation geology more particularly, to a kind of
The construction method of sheet-pile cofferdam formula drilled pile platform.
Background technology
A kind of necessary temporary facility that drilled pile platform is constructed as deepwater foundation bored pile, it is various informative, mainly
Its form of construction work should be determined according to principles such as geological conditions, construction technology, mechanical equipment and economic and practicals.It is common at present
Drilled pile platform includes that mound builds island, steel-pipe pile operation platform and floating operation platform etc..It is generally suitable that mound builds island platform
For low water level river, when river high water level is higher, the earth fill amount needed is more, and intrusion water surface area is larger, is unfavorable for
Flood control is passed the flood period；Steel-pipe pile operation platform is suitable for deep, shallow-water environment, simple in structure, rigidity is big, but early period, cost input was big, applied
The work period is long；Floating operation platform is easy to operate, flexible, and the construction period is short, is not influenced by water level sinking of floating, but waterborne sets
Standby input is more, and stability and positioning accuracy are relatively low, are not suitable for high-power drilling machine construction.When practice of construction, certain rivers can also
It is restricted by factors such as flood season, reservoir impoundment power generation, construction speed arrangements, it is relatively low in construction riverbed water level early period, but construct the later stage
Riverbed water level can be obviously improved, and increasing degree is larger（Front and back drop is up to 5-12 meters）.In order to improve integral construction economy, it is desirable to
The construction of drilled pile and steel sheet-pile cofferdam is just completed before river water level rising.But it is carried out on the river of formation geology
Duration longer problem that there are inserting pilings when steel sheet-pile cofferdam inserting piling is not in place, difficulty of construction is big, scar is slotted.Especially work as head
When height is more than 15m, the construction technology of installation inner support is excavated using conventional drainage cannot meet force request, and use underwater
Complicated construction technique, difficulty are big when installing inner support.In addition, time-consuming and laborious when clear rock underwater using the progress of conventional construction technique,
It is more difficult.
Invention content
The case where riverbed water level is obviously improved early period for the construction of phase riverbed water table ratio after construction, the present invention provides one
Kind short construction period, the structurally stable construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology.
To achieve the above object, the present invention can take following technical proposals：
It is of the present invention to build the construction method of island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology, including work as river
What is carried out when in lowstand period includes constructing the first step to the first stage of the 7th step：
The first step, progress manually build island, and then cutting depth is used in combination and draws water to the foundation pit of drilling pile framing bed course bottom on island
Infiltration in pumped foundation pit；
Second step installs steel plate pile concrete locating piece, the positioning of steel plate pile concrete according to cofferdam design scheme in bottom of foundation ditch
It is circumferentially prefabricated with multigroup spaced pairs of guide post at the top of block；
Third walks, and welds the bypass road being made of I-steel, the outside of guide post in inside on the madial wall of guide post on the outside
The interior circuit being made of I-steel is welded on wall, the top surface of steel plate pile concrete locating piece is close in the bottom surface of inside and outside circuit；
4th step is socketed outer positioning steel tube, and the welded limiting collar tie beam on its inside top wall on the outside in guide post；In inside
It is socketed interior positioning steel tube in guide post, and the bottom waling in cofferdam is installed at the top of it, installation is then bolted in bottom waling
Bottom inner support；
5th step installs steel sheet pile to closure successively between inside and outside positioning steel tube, wherein bypass road and limit collar tie beam are located at
The outside of steel sheet pile, interior circuit and bottom waling are located at the inside of steel sheet pile, and then, steel sheet pile is connected admittedly with bottom waling
It is fixed, interior positioning steel tube is removed later；
6th step is positioned with bottom inner support, bottom of foundation ditch install first segment steel pile casting, then adjacent steel pile casting it
Between assembly connection system；
7th step carries out the dry envelope of bed course of drilling pile framing in bottom of foundation ditch, realizes the anchor to first segment steel pile casting and steel sheet pile
Gu removing outer positioning steel tube and limit collar tie beam thereon later；
After completing first stage construction, implementation includes the second stage construction of the 8th step and the 9th step：
8th step, installs the waling and inner support of middle layer and top layer, while each first segment steel pile casting being connect and is up to designed
Absolute altitude, and connection system is installed；
9th step, the recharge into steel sheet-pile cofferdam by urban river water, and to the water level in cofferdam it is concordant with outside water level after, pass through steel
Casing and steel sheet pile set up drilled pile platform, complete construction.
When carrying out above-mentioned second stage construction, river is in lowstand period or highstand.
Artificial build is laid with plastic film in the side slope on island, and stacking woven bags.
The steel plate pile concrete locating piece includes multistage, the both ends of every section of steel plate pile concrete locating piece and/or angle point
Place is both provided with the pairs of guide post.
The guiding column length is 2-2.5m, including steel bushing and the concrete being cast in the steel bushing.
Construction method provided by the invention that build island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology, dexterously
The convenience of lowstand period is utilized, excavates Large Foundation Pit on island in artificial build, is under water-less environment while construction steel sheet pile
The steel pile casting of cofferdam and drilled pile construction provides precondition；Above-mentioned steel sheet-pile cofferdam is pacified using non-inserting piling mode
Dress makes platform construction precision height, short construction period；Steel pile casting uses section construction mode, can come to avoid water level elevated band
Adverse effect；Steel sheet-pile cofferdam and steel pile casting bottom are anchored by dry packing layer, and stable structure is firm, can be resistant to 18-
20 meters of ultrahigh-water head carries out follow-up cushion cap operation.
Compared with prior art, the invention has the advantages that：
1, batch production processing can be used in steel sheet pile positioning and mounting structure, shortens the construction period, and improves precision.
2, bottom waling and inner support are first filled, after apply steel sheet pile, improve steel sheet pile stress performance, higher water can be applicable in
Head is poor, compares fore shaft steel-pipe pile or steel jacket box, cost-effective.
3, steel sheet pile and steel pile casting take mounting means rather than inserting piling form, reduce difficulty of construction, improve work efficiency.
4, lowstand period is rationally utilized, work surface is quickly formed using the islands Ai Zhu mode, reduces cost.
5, drawing water, excavation rock stratum is lower than underwater cleaning rock stratum difficulty of construction in cofferdam, and operating condition is good.
Description of the drawings
Fig. 1 is the construction schematic diagram of step 1 of the present invention.
Fig. 2 be the present invention Step 2: three construction schematic diagram.
Fig. 3 is the vertical view for the steel plate pile concrete locating piece that installation is completed in Fig. 2.
Fig. 4 is the portions the A enlarged drawing in Fig. 2.
Fig. 5 is the construction schematic diagram of step 4 of the present invention.
Fig. 6 is the structural schematic diagram of bottom waling and bottom inner support that installation is completed in Fig. 5.
Fig. 7 is the portions the B enlarged drawing in Fig. 5.
Fig. 8 is the construction schematic diagram of step 5 of the present invention.
Fig. 9 be the present invention Step 6: seven construction schematic diagram.
Figure 10 is the structural schematic diagram for the first segment steel pile casting that installation is completed in Fig. 9.
Figure 11 is the construction schematic diagram of step 8 of the present invention.
Figure 12 is the construction schematic diagram of step 9 of the present invention.
Specific implementation mode
Illustrate of the present invention to build the drilling of island steel sheet-pile cofferdam formula suitable for formation geology with specific embodiment below
The construction method of stake platform.
The riverbed stratum in certain river is followed successively by middle sand, thick circle gravel soil, sandstone, wherein middle layer of sand is relatively thin, thick circle gravel soil and sand
Rock is more hard.Annual September to May next year is highstand（Height of water level is 545.0 meters）, carry out reservoir impoundment power generation, June to 8
The moon then sluices and crosses flood, is lowstand period（Height of water level is 537.0 meters）.Upper pond is apart from 16 kilometers of downstream dam.In the original plan 9
Month carries out drilled pile platform construction in reservoir area using weir method after first stake, however at a time when dam overhauls, turn(a)round is 20 days, inspection
The processing that discharges water is carried out to river when repairing, at this point, drilled pile land regions riverbed water level is less than 1m（Height of water level is 533.0 meters）.
This in special circumstances, integrated construction period and construction are put into, this is selected to state that the scheme carries out applying for drilled pile platform
Work.As shown in figs. 1-12, it is as follows：
Low water level condition when first with turn(a)round：
The first step, progress manually build island 1, then on island 1 cutting depth until the pile framing bed course bottom of drilling foundation pit 2, and
The infiltration in foundation pit 2 is extracted out with suction pump 3；In order to reduce the speed that the water in river is permeated into foundation pit 2, manually island 1 is being built
Side slope on be laid with plastic film a, and stacking woven bags b.
Second step, according to cofferdam design scheme in 2 bottom of foundation pit installation steel plate pile concrete locating piece 4, due to the design
In scheme, cofferdam is rectangle, therefore, from transport and consideration easy for installation, by steel plate pile concrete locating piece 4 according to bar blocks
With right angle block carry out it is prefabricated, and each piece of top surface be arranged to guide post 5.1,5.2.Usually, pairs of guide post point
Cloth is in the both ends of each prefabricated section and corner location, after the completion of prefabricated section splicing in foundation pit 2, where pairs of guide post
Line can constitute inside and outside two rectangle frames.In addition, steel plate pile concrete locating piece 4 can will be formed according to cofferdam design scheme
Prefabricated section carries out prefabricated, such as arc block in other forms.
Third walks, and welds the rectangle bypass road 6.1 being made of I-steel on the madial wall of guide post 5.1 on the outside, inside
Circuit 6.2 in the rectangle that welding is made of I-steel on the lateral wall of side guide post 5.2, the bottom of the inside and outside circuit of rectangle 6.2,6.1
It is close to the top surface of steel plate pile concrete locating piece 4 in face.
4th step is socketed outer positioning steel tube 7.1, and the welded limiting on its inside top wall on the outside in guide post 5.1
Collar tie beam 8；It is socketed interior positioning steel tube 7.2 in inside guide post 5.2, and the bottom waling 9 in cofferdam is installed at the top of it, then exists
Bottom inner support 10 is equipped with by flange bolt in bottom waling 9.In order to securely install inside and outside positioning steel tube 7.2,7.1, on
The steel bushing barrel structure that guide post is internal concrete perfusion is stated, and stretches out prefabricated section apical side height about 2-2.5m.
5th step, inside, bypass road 6.2,6.1 and limit collar tie beam 8, bottom waling 9 position-limiting action under, inside and outside
Steel sheet pile 11 is installed successively to closure between positioning steel tube 7.2,7.1；Then, bracket is welded on steel sheet pile 11, passes through bracket
Fixed bottom waling 9, it is closely knit with steel plate pad if having gap between bottom waling 9 and steel sheet pile；Steel is positioned in removing later
Pipe 7.2.
6th step is positioned with bottom inner support 10, the installation first segment steel pile casting 12 in 2 bottom of foundation pit, then in phase
Assembly connection system 13 between adjacent steel pile casting 12.
7th step carries out the 14 dry envelope of bed course of drilling pile framing in 2 bottom of foundation pit, realizes to first segment steel pile casting 12 and steel
Outer positioning steel tube 7.1 and limit collar tie beam 8 thereon are removed in the anchoring of sheet pile 11 later.Construction under the conditions of above-mentioned dry envelope, can have
Effect cleaning contact surface, concrete pouring quality is high, and speed of perfusion is fast, and infiltration can be good, and whole structural stability is strong, and it is mixed to do envelope
The cohesive force of solidifying soil and steel construction is up to 0.2MPa.And traditional construction generally carries out under water sealing condition, bottom concrete and steel
Cohesive force between structure is only capable of reaching 0.15MPa.
Above-mentioned work progress about 18 days, after the completion of in 11 cofferdam of steel sheet pile, molding and first segment steel pile casting 12 are constructed, reservoir
Start slow water storage, constructs including the second stage of the 8th step and the 9th step at this point, proceeding by：
8th step, installation middle layer waling 9.2 and inner support 10.2, top layer waling 9.3 and inner support 10.3, while by each the
The one fast quick access of section steel pile casting 12 up to designed elevation, and accordingly installation connection system, complete cofferdam and construct with steel pile casting；
9th step, by urban river water recharge into 11 cofferdam of steel sheet pile, and to the water level in cofferdam it is concordant with outside water level after, pass through
Steel pile casting and steel sheet pile set up drilled pile platform 15, complete construction.
As it can be seen that the construction of above-mentioned second stage is not influenced by external water level, the construction period is greatly saved, saves height
The fund of water level underwater construction, equipment investment.When carrying out second stage construction, the peak level in the river is up to 545.0 meters.Cause
This, in the 9th step into cofferdam recharge water, in order to make to allow the external water pressure difference in steel sheet pile be during drilled pile construction
Zero, better ensure that the structure safety and its water-stagnating effect in cofferdam.
In conclusion the main advantage of the present invention is as follows：
1, steel sheet pile and steel pile casting are realized by the dry sealing concrete bed course under water-less environment and are anchored, become assembly line work pattern into
Parallel operations pattern, can effectively shorten duration, and good water insulation effect；
2, interior guiding when bottom inner support serves not only as steel sheet pile construction, and installed in advance when steel sheet pile does not stress, it can
The stress performance for greatly improving steel sheet pile increases the structural stability of steel sheet pile, improves its ability for adapting to head height difference, reaches
It breaks through conventional 15m head differences and then is resistant to 18m-20m head differences；
3, construction steel sheet pile and steel pile casting under water-less environment, construction precision are high, efficient.
Claims (5)
1. a kind of construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology, it is characterised in that：Work as river
When road is in lowstand period, carry out including constructing the first step to the first stage of the 7th step：
The first step, progress manually build island, and then cutting depth is used in combination and draws water to the foundation pit of drilling pile framing bed course bottom on island
Infiltration in pumped foundation pit；
Second step installs steel plate pile concrete locating piece, the positioning of steel plate pile concrete according to cofferdam design scheme in bottom of foundation ditch
It is circumferentially prefabricated with multigroup spaced pairs of guide post at the top of block；
Third walks, and welds the bypass road being made of I-steel, the outside of guide post in inside on the madial wall of guide post on the outside
The interior circuit being made of I-steel is welded on wall, the top surface of steel plate pile concrete locating piece is close in the bottom surface of inside and outside circuit；
4th step is socketed outer positioning steel tube, and the welded limiting collar tie beam on its inside top wall on the outside in guide post；In inside
It is socketed interior positioning steel tube in guide post, and the bottom waling in cofferdam is installed at the top of it, installation is then bolted in bottom waling
Bottom inner support；
5th step installs steel sheet pile to closure successively between inside and outside positioning steel tube, wherein bypass road and limit collar tie beam are located at
The outside of steel sheet pile, interior circuit and bottom waling are located at the inside of steel sheet pile, and then, steel sheet pile is connected admittedly with bottom waling
It is fixed, interior positioning steel tube is removed later；
6th step is positioned with bottom inner support, bottom of foundation ditch install first segment steel pile casting, then adjacent steel pile casting it
Between assembly connection system；
7th step carries out the dry envelope of bed course of drilling pile framing in bottom of foundation ditch, realizes the anchor to first segment steel pile casting and steel sheet pile
Gu removing outer positioning steel tube and limit collar tie beam thereon later；
After completing first stage construction, implementation includes the second stage construction of the 8th step and the 9th step：
8th step, installs the waling and inner support of middle layer and top layer, while each first segment steel pile casting being connect and is up to designed
Absolute altitude, and connection system is installed；
9th step, the recharge into steel sheet-pile cofferdam by urban river water, and to the water level in cofferdam it is concordant with outside water level after, pass through steel
Casing and steel sheet pile set up drilled pile platform, complete construction.
2. the construction method according to claim 1 that build island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology,
It is characterized in that：When carrying out second stage construction, river is in lowstand period or highstand.
3. the construction method according to claim 1 that build island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology,
It is characterized in that：Artificial build is laid with plastic film in the side slope on island, and stacking woven bags.
4. the construction method of drilled pile after rock stratum condition according to claim 1 elder generation steel sheet-pile cofferdam, it is characterised in that：Institute
It includes multistage to state steel plate pile concrete locating piece, and the both ends of every section of steel plate pile concrete locating piece and/or corner point are both provided with
The pairs of guide post.
5. the construction method of drilled pile after rock stratum condition according to claim 1 elder generation steel sheet-pile cofferdam, it is characterised in that：Institute
It is 2-2.5m to state and be oriented to column length, including steel bushing and the concrete being cast in the steel bushing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810454572.5A CN108589543B (en) | 2018-05-14 | 2018-05-14 | The construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology |
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| CN109469080A (en) * | 2018-12-11 | 2019-03-15 | 中铁五局集团贵州工程有限公司 | A kind of embedding rock steel sheet pile cofferdam structure and its construction method under water |
| CN113482023A (en) * | 2021-07-19 | 2021-10-08 | 中建桥梁有限公司 | Construction method of large double-wall steel cofferdam for Yangtze river shoal |
| CN113832998A (en) * | 2021-09-22 | 2021-12-24 | 中交路桥华南工程有限公司 | Pebble covering layer steel sheet pile cofferdam system and construction method thereof |
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| CN104929133A (en) * | 2015-06-09 | 2015-09-23 | 沈阳市政集团有限公司 | Deep foundation pit Larsen steel sheet pile bottom sloping support construction method |
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| CN109469080A (en) * | 2018-12-11 | 2019-03-15 | 中铁五局集团贵州工程有限公司 | A kind of embedding rock steel sheet pile cofferdam structure and its construction method under water |
| CN109469080B (en) * | 2018-12-11 | 2023-12-19 | 中铁五局集团贵州工程有限公司 | Underwater rock-socketed steel sheet pile cofferdam structure and construction method thereof |
| CN113482023A (en) * | 2021-07-19 | 2021-10-08 | 中建桥梁有限公司 | Construction method of large double-wall steel cofferdam for Yangtze river shoal |
| CN113482023B (en) * | 2021-07-19 | 2023-02-17 | 中建桥梁有限公司 | Construction method of large double-wall steel cofferdam for Yangtze river shoal |
| CN113832998A (en) * | 2021-09-22 | 2021-12-24 | 中交路桥华南工程有限公司 | Pebble covering layer steel sheet pile cofferdam system and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN108589543B (en) | 2019-07-23 |
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