CN110158624A - A kind of steel sheet pile cofferdam construction method - Google Patents
A kind of steel sheet pile cofferdam construction method Download PDFInfo
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- CN110158624A CN110158624A CN201910458516.3A CN201910458516A CN110158624A CN 110158624 A CN110158624 A CN 110158624A CN 201910458516 A CN201910458516 A CN 201910458516A CN 110158624 A CN110158624 A CN 110158624A
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- steel sheet
- sheet pile
- pilot hole
- cofferdam
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Classifications
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a kind of steel sheet pile cofferdam construction methods, comprising: bores multiple pilot holes in setting regions, and fills husky into each pilot hole.The inserting piling steel sheet pile into each pilot hole makes all steel sheet piles join the two sections of a bridge, etc to forming cofferdam in setting regions；Self-hardening slurry is perfused into each pilot hole to preset height；After self-hardening slurry reaches intensity, the water in cofferdam is discharged.Present invention efficiently solves before drawing water in cofferdam, underwater bottom concrete construction need to be carried out, but bottoming concrete thickness is big, the problem of complicated organization.
Description
Technical field
The present invention relates to foundation construction fields in bridge water, and in particular to a kind of steel sheet pile cofferdam construction method.
Background technique
Steel sheet-pile cofferdam is a kind of most common sheet-pile cofferdam.Steel sheet pile is a kind of fashioned iron with fore shaft, and section has
It is straight panel shape, flute profile, U-shaped and Z-shaped etc., there are full range of sizes and an interlocking form, riverbed is inserted by plurality of steel plates stake when cofferdam
The cofferdam of various shapes is formed after surrounding.
When current water Steel Sheet Pile cofferdam construction, steel sheet pile is mainly squeezed by riverbed by vibro-pile driver, due to not
With job location geologic structure it is not identical, when encountering hard rock stratum, steel sheet pile is difficult to squeeze into.In the case, steel sheet pile
Inserting piling needs to carry out pilot hole in advance, fills sand after pilot hole in hole, on the one hand prevents collapse hole, on the other hand can ensure that steel sheet pile is smooth
It squeezes into sand hole.After the closure of steel sheet pile inserting piling and inner support are installed, cofferdam internal drainage carries out bearing platform construction after excavating, in water
Under pressure effect, steel sheet pile is inside and outside to form infiltration lane, the layer of sand being perfused in pilot hole can be destroyed, to influence the anchoring of steel sheet pile
Ability, seriously infiltration will affect bearing platform construction and jeopardize cofferdam structure safety in cofferdam.
To solve the above problems, usually before drawing water in cofferdam, first cutting the earth after the completion of steel sheet pile inserting piling at present
Construction, then underwater bottom concrete construction is carried out, but bottoming concrete thickness is larger, complicated organization increases cost,
Extend the construction time.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of steel sheet pile cofferdam construction method,
It can efficiently solve before drawing water in cofferdam, underwater bottom concrete construction need to be carried out, but bottoming concrete thickness is big, construct
Organize complicated problem.Before bottom concrete construction, hard rock stratum need to be excavated, difficulty of construction is big, and excavates hard rock stratum
A large amount of expense can be all generated with bottom concrete construction.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of steel sheet pile cofferdam construction method, comprising:
Multiple pilot holes are bored in setting regions, and fill husky into each pilot hole；
The inserting piling steel sheet pile into each pilot hole makes all steel sheet piles join the two sections of a bridge, etc to forming cofferdam in setting regions；
Self-hardening slurry is perfused into each pilot hole to preset height；
After self-hardening slurry reaches intensity, the water in cofferdam is discharged.Based on the above technical solution, in setting regions
It is interior to bore multiple pilot holes, and fill sand into each pilot hole and include:
Multiple pilot holes are bored according to certain spacing, and fill husky into multiple pilot holes, the spacing is less than the pilot hole
Diameter；
A pilot hole is bored again between two adjacent pilot holes, and fills husky in the pilot hole.In above-mentioned technical side
On the basis of case, multiple pilot holes are being bored in setting regions, comprising:
Leading truck is installed；
The multiple pilot hole steel pile castings of vibration hammer inserting piling are lifted by crane using crawler crane along the leading truck；
Multiple pilot holes are bored by multiple pilot hole steel pile castings using churning driven.
Based on the above technical solution, the leading truck is mounted on drilling platform.
Based on the above technical solution, before the leading truck is installed, pilot hole platform, the leading truck installation are established
On the pilot hole platform.
Based on the above technical solution, the steel sheet pile uses U-shaped steel sheet pile
Based on the above technical solution, the self-hardening slurry is stirred by bentonite and cement plus water.
Based on the above technical solution, self-hardening slurry is perfused into pilot hole, comprising:
It mixes and sets bentonite slurry, be put into extruding pond extruding；
Cement mixing is added into self-hardening slurry magma；
Self-hardening slurry is injected in pilot hole with grouting equipment.
Based on the above technical solution, the preset height that self-hardening slurry is perfused is high according to head locating inside and outside cofferdam
Degree difference determines.
Based on the above technical solution, after inner support being installed in cofferdam, the dewatering excavation construction in cofferdam is carried out.
Compared with the prior art, the advantages of the present invention are as follows:
The present invention after the completion of steel sheet pile inserting piling, first inject self-hardening slurry, after the mode drawn water in cofferdam, utilize self-solidifying
Mortar blocks the infiltration lane that cofferdam pilot hole is formed, and can be realized the dry excavation construction environment in water Steel Sheet Pile cofferdam, reduction is enclosed
Weir is constantly seeped water after drawing water, and is reduced the possibility for influencing bearing platform construction and jeopardizing cofferdam structure safety, is made cushion cap bottom solum (rock
Layer) load when thering is enough bearing capacities support cushion cap to pour.It avoids underwater bottom concrete from constructing, improves construction operation ring
Border, while the construction of cofferdam bottom concrete has been saved, the duration is shortened, cost is also saved.
Detailed description of the invention
Fig. 1 is that single steel sheet pile is inserted into schematic diagram in pilot hole in the embodiment of the present invention；
Fig. 2 is inserting piling pilot hole steel pile casting schematic diagram in the embodiment of the present invention；
Fig. 3 is to fill husky schematic diagram in drawing hole construction and hole in the embodiment of the present invention；
Fig. 4 is multiple steel sheet pile pilot hole floor map in the embodiment of the present invention.
In figure: 1- pilot hole, 2- is husky, 3- steel sheet pile, 4- self-hardening slurry, 5- leading truck, 61- crawler crane, 62- vibration hammer,
7- pilot hole steel pile casting, 8- churning driven, 9- drilling platform.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Fig. 1 is that single steel sheet pile is inserted into schematic diagram, such as Fig. 1 in pilot hole in the embodiment of the present invention, and the embodiment of the present invention provides
A kind of steel sheet pile cofferdam construction method characterized by comprising
S1: boring multiple pilot holes 1 in setting regions, and sand 2 is filled into each pilot hole 1.
In the present embodiment, setting regions is wanted the position of inserting piling by the steel sheet pile in the cofferdam of design, at the cofferdam of design
Shape.Drill hole 1 in this step simultaneously fills sand 2 in pilot hole 1 and prepares for subsequent inserting piling steel sheet pile 3.
S1 step specifically includes:
S11: installation leading truck 5.
Optionally, if being set drilling platform 9 before drill hole 1, leading truck 5 is mounted on drilling platform 9.
Optionally, if before drill hole 1 not set drilling platform 9, establish pilot hole platform, leading truck 5 be mounted on
On pilot hole platform.
Fig. 2 is inserting piling pilot hole steel pile casting schematic diagram in the embodiment of the present invention, as shown in Figure 2:
S12: the multiple pilot hole steel pile castings 7 of 62 inserting piling of vibration hammer are lifted by crane using crawler crane 61 along leading truck 5.
In the present embodiment, leading truck 5 play the guiding role in inserting piling pilot hole steel pile casting 7, it is ensured that pilot hole steel pile casting 7 meets
Preset requirement.
Fig. 3 is to fill husky schematic diagram in drawing hole construction and hole in the embodiment of the present invention, as shown in Figure 3:
S13: multiple pilot holes 1 are bored by multiple pilot hole steel pile castings 7 using churning driven 8.
Pilot hole steel pile casting 7 is to return to drain on platform for convenience of circulating mud used in churning driven 8 in the present embodiment, is saved
Save circulating mud.Certainly in other embodiments, can not also inserting piling pilot hole steel pile casting 7, circulating mud is directly discharged into water.
Fig. 4 is the multiple steel sheet pile pilot hole floor map of office in the embodiment of the present invention, as shown in Figure 4:
Preferably, multiple pilot holes 1 are bored in setting regions, and are filled sand 2 into each pilot hole 1 and included:
Multiple pilot holes 1 are bored according to certain spacing, and fill sand 2 into multiple pilot holes 1, spacing is less than the diameter of pilot hole 1.
A pilot hole 1 is bored again between two adjacent pilot holes 1, and sand 2 is filled in the pilot hole.
The mode of such drill hole 1 can will lead between two pilot holes 1 to avoid continuous drill hole 1 and interfere with each other, lead
Collapse hole phenomenon is caused to occur.
S2: the inserting piling steel sheet pile 3 into each pilot hole 1 makes all steel sheet piles 3 join the two sections of a bridge, etc to forming cofferdam in setting regions.
Preferably, steel sheet pile 3 uses U-shaped steel sheet pile.U-shaped steel sheet-pile structure form is symmetrically reusable, and length can be ordered
System brings great convenience for construction, while also reducing cost.
By S2 step, the elementary contour in cofferdam builds completion.The subsequent seepage problem that also solve in pilot hole.Join again
See Fig. 1, S3: self-hardening slurry 4 being perfused into each pilot hole 1 to preset height.
Specifically, self-hardening slurry 4 is perfused into pilot hole, comprising:
A: mixing and set bentonite slurry, is put into extruding pond extruding；
B: cement mixing is added into the magma of self-hardening slurry 4；
C: self-hardening slurry 4 is injected in pilot hole 1 with grouting equipment.
In the present embodiment, 4 slush pump of self-hardening slurry is injected since the bottom of pilot hole 1, and bottom is impermeable stratum, in this way
The anti-seepage effect of self-hardening slurry 4 can be made more preferable.By grouting equipment slip casting, i.e., grouting pump passes through mini-valve tube or steel floral tube will
4 slush pump of self-hardening slurry is injected since the bottom of pilot hole 1.
Preferably, self-hardening slurry is stirred by bentonite and cement plus water.Made of bentonite and cement plus water stirring
Slurries can voluntarily condense into the flexible material of a kind of low-intensity, low-elasticity-modulus and big limiting strain.It can completely cut off outside cofferdam
Water immerse cofferdam inside, play impermeable effect, and when recycling steel sheet pile, self-hardening slurry intensity is low, convenient steel plate
The recycling of stake.
Preferably, the preset height that self-hardening slurry 4 is perfused is determined according to head height difference locating inside and outside cofferdam.
It can first pass through calculating or experiment obtains various bentonites and cement proportion mixed serum makes in cofferdam can block
Portion and external impermeable corresponding head height.The self-hardening slurry being perfused required for can also being derived from by theoretical formula
4 height.When implementing, it is ensured that the height of the self-hardening slurry 4 of perfusion is on empirically or theoretically height.
S4: after self-hardening slurry 4 reaches intensity, the dewatering excavation construction in cofferdam is carried out.
Self-hardening slurry 4, which reaches intensity, can reach preset anti-seepage effect.
Preferably, after inner support being installed in cofferdam, the water that is then exhausted from cofferdam.Inner support is added in the inside in cofferdam can
So that there is better mechanical property in cofferdam, prevent after taking the water in cofferdam away, extraneous hydraulic pressure damages cofferdam by pressure.
In conclusion the present invention is after the completion of steel sheet pile inserting piling, first inject self-hardening slurry, after the side drawn water in cofferdam
Formula, the infiltration lane formed using self-hardening slurry blocking cofferdam pilot hole can be realized the dry excavation construction in water Steel Sheet Pile cofferdam
Environment is reduced after cofferdam is drawn water and is constantly seeped water, reduces the possibility for influencing bearing platform construction and jeopardizing cofferdam structure safety, make cushion cap bottom
Load when portion's soil layer (rock stratum) has enough bearing capacity support cushion caps to pour.It avoids underwater bottom concrete from constructing, improves construction
Operating environment, while cofferdam bottom concrete has been saved, the duration is shortened, cost is also saved.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of steel sheet pile cofferdam construction method characterized by comprising
It is bored in setting regions multiple pilot holes (1), and fills husky (2) into each pilot hole (1)；
To each interior inserting piling steel sheet pile (3) of pilot hole (1), all steel sheet piles (3) is made to join the two sections of a bridge, etc to being formed in setting regions and enclose
Weir；
Self-hardening slurry (4) are perfused into each pilot hole (1) to preset height；
After self-hardening slurry (4) reaches intensity, the water in cofferdam is discharged.
2. a kind of steel sheet pile cofferdam construction method as described in claim 1, which is characterized in that bore multiple draw in setting regions
Hole (1), and fill husky (2) into each pilot hole (1) and include:
Multiple pilot holes (1) are bored according to certain spacing, and fill husky (2) into multiple pilot holes (1), the spacing is less than described
The diameter of pilot hole (1)；
A pilot hole (1) is bored again between two adjacent pilot holes (1), and husky (2) are filled in the pilot hole.
3. a kind of steel sheet pile cofferdam construction method as claimed in claim 1, which is characterized in that boring multiple pilot holes in setting regions
(1), comprising:
It installs leading truck (5)；
The multiple pilot hole steel pile castings (7) of vibration hammer (62) inserting piling are lifted by crane using crawler crane (61) along the leading truck (5)；
Multiple pilot holes (1) are bored by multiple pilot hole steel pile castings (7) using churning driven (8).
4. a kind of steel sheet pile cofferdam construction method as claimed in claim 3, which is characterized in that the leading truck (5) is mounted on
On drilling platform (9).
5. a kind of steel sheet pile cofferdam construction method as claimed in claim 3, which is characterized in that installing the leading truck (5)
Before, pilot hole platform is established, the leading truck (5) is mounted on the pilot hole platform.
6. a kind of steel sheet pile cofferdam construction method as described in any one in claim 1-5, which is characterized in that the steel sheet pile
(3) U-shaped steel sheet pile is used.
7. a kind of steel sheet pile cofferdam construction method as described in any one in claim 1-5, which is characterized in that the self-hardening slurry
(4) it is stirred by bentonite and cement plus water.
8. a kind of steel sheet pile cofferdam construction method as claimed in claim 7, which is characterized in that self-solidifying is perfused in Xiang Yinkong (1)
Mortar (4), comprising:
It mixes and sets bentonite slurry, be put into extruding pond extruding；
Cement mixing is added into the magma of self-hardening slurry (4)；
It will be in self-hardening slurry (4) injection pilot hole (1) with grouting equipment.
9. a kind of steel sheet pile cofferdam construction method as described in claim 1, which is characterized in that the pre- of self-hardening slurry (4) is perfused
If height is determined according to head height difference locating inside and outside cofferdam.
10. a kind of steel sheet pile cofferdam construction method as described in claim 1, which is characterized in that install inner support in cofferdam
Afterwards, the dewatering excavation construction in cofferdam is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910458516.3A CN110158624A (en) | 2019-05-29 | 2019-05-29 | A kind of steel sheet pile cofferdam construction method |
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| CN201910458516.3A CN110158624A (en) | 2019-05-29 | 2019-05-29 | A kind of steel sheet pile cofferdam construction method |
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Cited By (8)
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| CN110563396A (en) * | 2019-09-16 | 2019-12-13 | 毛景权 | Steel sheet pile cofferdam lead hole backfill material, preparation method and backfill method |
| CN112557216A (en) * | 2020-11-16 | 2021-03-26 | 中冶集团武汉勘察研究院有限公司 | Method and device for testing shear strength index of foundation pit support |
| CN113293783A (en) * | 2021-06-30 | 2021-08-24 | 中建三局集团有限公司 | Construction method for leading hole of underwater steel cofferdam |
| CN113322990A (en) * | 2021-07-08 | 2021-08-31 | 中建三局集团有限公司 | Construction method of lock catch steel pipe pile cofferdam suitable for thin-covering-layer hard riverbed |
| CN113356246A (en) * | 2021-05-15 | 2021-09-07 | 中铁九局集团第六工程有限公司 | Construction method of combined cofferdam under hard riverbed |
| CN114108667A (en) * | 2021-11-30 | 2022-03-01 | 中铁二院工程集团有限责任公司 | Construction method of steel sheet pile cofferdam |
| CN114482099A (en) * | 2022-02-10 | 2022-05-13 | 中交二航局第二工程有限公司 | Steel sheet pile cofferdam construction method |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110563396A (en) * | 2019-09-16 | 2019-12-13 | 毛景权 | Steel sheet pile cofferdam lead hole backfill material, preparation method and backfill method |
| CN112557216A (en) * | 2020-11-16 | 2021-03-26 | 中冶集团武汉勘察研究院有限公司 | Method and device for testing shear strength index of foundation pit support |
| CN112557216B (en) * | 2020-11-16 | 2023-07-18 | 中冶集团武汉勘察研究院有限公司 | Method and device for testing shear strength index of foundation pit support |
| CN113356246A (en) * | 2021-05-15 | 2021-09-07 | 中铁九局集团第六工程有限公司 | Construction method of combined cofferdam under hard riverbed |
| CN113293783A (en) * | 2021-06-30 | 2021-08-24 | 中建三局集团有限公司 | Construction method for leading hole of underwater steel cofferdam |
| CN113293783B (en) * | 2021-06-30 | 2022-05-20 | 中建三局集团有限公司 | Construction method for hole leading of underwater steel cofferdam |
| CN113322990A (en) * | 2021-07-08 | 2021-08-31 | 中建三局集团有限公司 | Construction method of lock catch steel pipe pile cofferdam suitable for thin-covering-layer hard riverbed |
| CN114108667A (en) * | 2021-11-30 | 2022-03-01 | 中铁二院工程集团有限责任公司 | Construction method of steel sheet pile cofferdam |
| CN114482099A (en) * | 2022-02-10 | 2022-05-13 | 中交二航局第二工程有限公司 | Steel sheet pile cofferdam construction method |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
| CN116856408B (en) * | 2023-09-04 | 2023-11-07 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
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