CN108589543B - 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
- Publication number
- CN108589543B CN108589543B CN201810454572.5A CN201810454572A CN108589543B CN 108589543 B CN108589543 B CN 108589543B CN 201810454572 A CN201810454572 A CN 201810454572A CN 108589543 B CN108589543 B CN 108589543B
- Authority
- CN
- China
- Prior art keywords
- pile
- steel
- steel sheet
- construction
- cofferdam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Revetment (AREA)
Abstract
The invention discloses a kind of construction methods for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology, and the first stage construction of lowstand period is in including river: first manually building island, excavation pit, draw water；The steel plate pile concrete locating piece of pairs of guide post is had in bottom of foundation ditch installation again；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 it carries out second stage construction: other layer of waling and inner support being installed, connect high first segment steel pile casting, and set up drilled pile platform, complete construction.Present invention utilizes the convenience of lowstand period, short construction periods, precision height, stabilized structure.
Description
Technical field
The present invention relates to foundation construction technical fields in bridge water, build island steel suitable for formation geology more particularly, to a kind of
The construction method of sheet-pile cofferdam formula drilled pile platform.
Background technique
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, and structure is simple, 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 investment is more, and stability and positioning accuracy are lower, are not suitable for high-power drilling machine construction.When practice of construction, certain rivers can also
It is lower in construction riverbed early period water level by the restriction of the factors such as flood season, reservoir impoundment power generation, construction speed arrangement, but construct the later period
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 greater than 15m, force request is not able to satisfy using the construction technology that conventional drainage excavates installation inner support, and is used 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.
Summary of the invention
The case where being obviously improved for the construction riverbed early period water level 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 is in the first stage construction including the first step to the 7th step carried out when lowstand period:
The first step, progress manually build island, and then cutting depth is used in combination to the foundation pit for the pile framing bed course bottom that drills on island
Suction pump extracts the infiltration in foundation pit out；
Second step installs steel plate pile concrete locating piece, steel plate pile concrete in bottom of foundation ditch according to cofferdam design scheme
The spaced pairs of guide post of multiple groups is circumferentially prefabricated at the top of locating piece；
Third step welds the bypass road being made of I-steel, the guide post in inside on the outside on the inner sidewall of guide post
The interior circuit being made of I-steel is welded on lateral wall, the top of steel plate pile concrete locating piece is close in the bottom surface of inside and outside circuit
Face；
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；?
It is socketed interior positioning steel tube in the guide post of inside, and the bottom waling in cofferdam is installed at the top of it, is then bolted in bottom waling
Installing bottom layer inner support；
5th step successively installs steel sheet pile to closure between inside and outside positioning steel tube, wherein bypass road and limit collar tie beam
Positioned at the outside of steel sheet pile, then the inside that interior circuit and bottom waling are located at steel sheet pile connects steel sheet pile with bottom waling
It is fixed, interior positioning steel tube is removed later；
6th step is positioned with bottom inner support, is installed first segment steel pile casting in bottom of foundation ditch, is then protected in adjacent steel
Assembly connection system between cylinder；
7th step is realized in the dry envelope of bed course that bottom of foundation ditch carries out drilling pile framing to first segment steel pile casting and steel sheet pile
Anchoring, remove outer positioning steel tube and limit collar tie beam thereon later；
After completing first stage construction, implement the second stage construction including 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 up to
Designed elevation, 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, lead to
It crosses steel pile casting and steel sheet pile sets up drilled pile platform, complete construction.
When carrying out the construction of above-mentioned second stage, river is in lowstand period or highstand.
Described manually 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 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, builds manually and excavates Large Foundation Pit on island, is construction steel sheet pile simultaneously under water-less environment
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 increase bring to avoid water level
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 subsequent cushion cap operation.
Compared with prior art, the present invention has the advantage 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, more Gao Shui can be applicable in
Head is poor, compares fore shaft steel-pipe pile or steel jacket box, save the cost.
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 island Ai Zhu mode, is reduced costs.
5, it draws water and excavates that rock stratum is lower than underwater cleaning rock stratum difficulty of construction in cofferdam, and operating condition is good.
Detailed description of the invention
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 top view that the steel plate pile concrete locating piece of installation is completed in Fig. 2.
Fig. 4 is the portion 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 bottom waling that installation is completed in Fig. 5 and the structural schematic diagram of bottom inner support.
Fig. 7 is the portion 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 that the first segment steel pile casting of 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 embodiment
Below with specific embodiment come illustrate it is of the present invention suitable for formation geology build island steel sheet-pile cofferdam formula drilling
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), carries 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 using weir method after first stake in reservoir area, 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 533.0 meters less than 1m(height of water level).
This in special circumstances, integrated construction period and construction investment select this to state that the scheme carries out applying for drilled pile platform
Work.As shown in figs. 1-12, the specific steps are as follows:
Low water level condition when first with turn(a)round:
The first step, progress manually build island 1, then foundation pit of the cutting depth up to drilling pile framing bed course bottom on island 1
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 building
Plastic film a, and stacking woven bags b are laid in the side slope on island 1.
Second step installs steel plate pile concrete locating piece 4 in 2 bottom of foundation pit according to cofferdam design scheme, 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
Guide post 5.1,5.2 that is prefabricated, and being arranged to pair each piece of top surface is carried out with right angle block.Generally, pairs of guide post point
Both ends and corner location of the cloth in each prefabricated section, after the completion of prefabricated section splices 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 step welds the rectangle bypass road 6.1 being made of I-steel, inside on the outside on the inner sidewall of guide post 5.1
Circuit 6.2 in the rectangle being made of I-steel, the bottom of the inside and outside circuit 6.2,6.1 of rectangle are welded on the lateral wall of side guide post 5.2
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.For the inside and outside positioning steel tube 7.2,7.1 of firm installation, 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 successively installed 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, first segment steel pile casting 12 is installed in 2 bottom of foundation pit, then in phase
Assembly connection system 13 between adjacent steel pile casting 12.
7th step carries out the dry envelope of bed course 14 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, at this point, start to carry out include the 8th step and the 9th step second stage construction:
8th step installs middle layer waling 9.2 and inner support 10.2, top layer waling 9.3 and inner support 10.3, while will be each
A fast quick access of first segment steel pile casting 12 up to designed elevation, and accordingly installation connection system, complete cofferdam and steel pile casting are constructed；
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,
Drilled pile platform 15 is set up by steel pile casting and steel sheet pile, completes 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, the recharge water into cofferdam in the ninth step, in order to make to allow external water pressure difference in steel sheet pile during drilled pile construction
Zero, better ensure that the structure safety and its water-stagnating effect in cofferdam.
In conclusion main advantage of the 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 anchors, and becomes pipelining mould
Formula is parallel operations mode, 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 pacify in advance when steel sheet pile does not stress
Dress, is greatly improved the stress performance of steel sheet pile, increases the structural stability of steel sheet pile, improves its energy for adapting to head height difference
Power reaches and breaks through conventional 15m head difference and then be resistant to 18m-20m head difference；
3, construction steel sheet pile and steel pile casting under water-less environment, construction precision are high, 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, then on island cutting depth to drilling pile framing bed course bottom foundation pit, and with drawing water
Pumping goes out the infiltration in foundation pit；
Second step installs steel plate pile concrete locating piece, the positioning of steel plate pile concrete in bottom of foundation ditch according to cofferdam design scheme
The spaced pairs of guide post of multiple groups is circumferentially prefabricated at the top of block；
Third step welds the bypass road being made of I-steel, the outside of guide post in inside on the outside on the inner sidewall of guide post
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 successively installs steel sheet pile to closure 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 realizes the anchor to first segment steel pile casting and steel sheet pile in the dry envelope of bed course that bottom of foundation ditch carries out drilling pile framing
Gu removing outer positioning steel tube and limit collar tie beam thereon later；
After completing first stage construction, implement the second stage construction including 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 by: river is in lowstand period or highstand when carrying out second stage construction.
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 by: described manually build is laid with plastic film in the side slope on island, and stacking woven bags.
4. 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 by: the steel plate pile concrete locating piece includes multistage, the both ends and/or angle of every section of steel plate pile concrete locating piece
The pairs of guide post is provided at point.
5. 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 by: the guiding column length is 2-2.5m, including steel bushing and the concrete being cast in the steel bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108589543A CN108589543A (en) | 2018-09-28 |
| CN108589543B true CN108589543B (en) | 2019-07-23 |
Family
ID=63636981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810454572.5A Active 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108589543B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4123063B2 (en) * | 2003-05-08 | 2008-07-23 | 博 原 | U-shaped steel sheet pile |
| KR101068147B1 (en) * | 2010-03-25 | 2011-09-27 | 황현만 | Pile driving apparatus for installing wide steel sheet pile and installing method of wide steel sheet pile using such guide apparatus |
| CN202925556U (en) * | 2012-10-22 | 2013-05-08 | 中交第二航务工程局有限公司 | Mounting and guiding device for underwater circuit purlins of steel sheet pile cofferdam |
| CN102912809B (en) * | 2012-11-06 | 2014-12-10 | 中铁大桥局股份有限公司 | Construction method for bearing platform with bottom surface in hard impervious bed |
| CN103882881B (en) * | 2014-04-11 | 2015-12-30 | 山东黄河工程集团有限公司 | Go deep into rock construction method under water |
| CN104196042B (en) * | 2014-08-15 | 2015-12-09 | 中国建筑第六工程局有限公司 | A kind of steel sheet pile cofferdam structure construction method |
| CN104196034B (en) * | 2014-09-18 | 2016-09-21 | 中建交通建设集团有限公司 | A kind of utilize steel sheet pile as the foundation ditch construction method in supporting cofferdam |
| CN104929133B (en) * | 2015-06-09 | 2016-11-09 | 沈阳市政集团有限公司 | The construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake |
-
2018
- 2018-05-14 CN CN201810454572.5A patent/CN108589543B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108589543A (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101936167B (en) | Construction method for crossing bridge pile foundation by combining bridge underpinning with shield construction | |
| CN109487807B (en) | Steel pipe pile cofferdam hole leading and replacement construction method | |
| US6139225A (en) | Method for building an underground continuous wall | |
| CN108589543B (en) | The construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology | |
| CN101538833B (en) | Vertical subsection double-wall steel cofferdam water stopping construction method | |
| CN102900089A (en) | Combined steel pile cofferdam provided with water swellable waterproof rubber fore shaft | |
| CN105350526B (en) | Method for setting up steel platform | |
| CN104805854A (en) | Method for constructing deep-water ultra-long steel plate pile cofferdam in tide environment | |
| CN101736744A (en) | Self-balancing sinking large-diameter tubular pile and construction method thereof | |
| CN109339079B (en) | Foundation pit water stopping system adjacent to river permeable stratum and construction process thereof | |
| CN205134193U (en) | Bridge owner mound cushion cap underground structure on gentle slope riverbed basement rock | |
| CN111350201A (en) | Construction method of steel sheet pile cofferdam of deep-water low-pile cap of thick pebble bed riverbed | |
| CN110359476A (en) | A kind of construction method of steel sheet-pile cofferdam inner support and drilled pile steel pile casting installation operation platform | |
| CN112761644A (en) | Suspension sinking vertical shaft well completion process | |
| CN109235474B (en) | Structure of super-large cofferdam based on marine environment and construction process thereof | |
| CN110565686A (en) | Construction method for penetrating river channel under pipe gallery | |
| CN112627212B (en) | Water-faced cofferdam inner tube well dewatering dry excavation construction method | |
| CN213296396U (en) | Steel sheet pile cofferdam for tidal zone of sea area | |
| CN115614542B (en) | Pipe jacking construction method taking existing foundation pit in water as starting point | |
| CN209260739U (en) | A kind of foundation pit water-stopping system close to river permeable stratum | |
| CN109162288B (en) | Lock catch type steel pipe pile cofferdam construction device and construction method | |
| CN104499489A (en) | Foundation pit construction method | |
| CN111980039B (en) | Construction method and structure of steel sheet pile cofferdam in tidal zone of sea area | |
| CN212335895U (en) | Improved generation assembled mountain area river course shore protection structure | |
| CN85202494U (en) | Interlocked reinforced concrete sheet pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |