CN107034906A - Marine shallow slotting formula steel cylinder foundation trench excavates altering fill method - Google Patents
Marine shallow slotting formula steel cylinder foundation trench excavates altering fill method Download PDFInfo
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- CN107034906A CN107034906A CN201710293740.2A CN201710293740A CN107034906A CN 107034906 A CN107034906 A CN 107034906A CN 201710293740 A CN201710293740 A CN 201710293740A CN 107034906 A CN107034906 A CN 107034906A
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- excavation
- foundation trench
- steel cylinder
- dredger
- construction
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/12—Back-filling of foundation trenches or ditches
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Altering fill method is excavated the invention discloses the shallow slotting formula steel cylinder foundation trench in sea, is comprised the following steps：(1) tugboat traction grab boat, is excavated near point into predetermined；(2) steel cylinder foundation trench is carried out to excavate：(a) first vertical shift dredger carries out longitudinal layered excavation, folded before and after grabbing bucket in the longitudinal digging process of dredger to struggle against；(b) it is when grooving width once digs width more than dredger, dredger is traversing, then repeat described step (a) and carry out next bar steel cylinder foundation trench excavation construction；(3) water surface in the range of foundation trench sets segmentation cursory, then belt blast ship Cast-in-situ Piles in Sand-filling into foundation trench is used in each segmentation successively, in each segmentation during Cast-in-situ Piles in Sand-filling, belt blast ship is constantly mobile to change throwing position, and belt blast ship ramming is being used close to after engineered fill absolute altitude to designed elevation.This method can realize the base property for changing offshore steel cylinder structure hard foundation trench, contribute to the heavy construction of shaking of steel cylinder bank protection structure subsequently.
Description
Technical field
The present invention relates to marine man-made island construction field, relate in particular to a kind of marine shallow slotting formula steel cylinder foundation trench and excavate
Altering fill method.
Background technology
Using steel cylinder as bank protection structure, it is during marine man-made island is constructed to be formed and carry out internal Tian Haizao islands after shore protection again
Emerging technology.The features such as construction method has quick construction, batch production manufacture, effect on environment is small.Currently known field
In, the steel cylinder as port Zhuhai and Macao bridge man-made island bank protection structure is used is deep insertion steel cylinder bank protection structure, deep insertion steel
Cylinder inserts bedding depth dependent on cylinder, keeps integrally-built stability, it is adaptable to muck soil or mollisol thickness
Area.
For hard soil layer area, it is more suitable for using shallow slotting formula steel cylinder bank protection structure.Shallow slotting formula steel cylinder utilizes it
Action of Gravity Field plays earth-retaining to back filled region in island and goes along with sb. to guard him effect, is the key technology that future development man-made island is built.However, hard
Matter soil layer area is due to the particularity of soil property, it is impossible to ensure that effectively shaking for steel cylinder bank protection structure is heavy, therefore need to be to hard foundation trench
Pre-processed and sink to construction to carry out follow-up steel cylinder.
But current steel cylinder bank protection construction technology is deep insertion steel cylinder, for shallow slotting formula steel cylinder construction technology still
Beyond example, does not have correlative study even more to shallow slotting formula steel cylinder foundation trench treatment technology.
The content of the invention
It is an object of the invention to overcome the shortcomings of that prior art is excavated there is provided a kind of marine shallow slotting formula steel cylinder foundation trench to change
Construction method is filled out, to realize that marine shallow slotting formula steel cylinder foundation trench handles the breakthrough of construction technology and perfect.
To reach above-mentioned purpose, the present invention uses following technical proposals：
Marine shallow slotting formula steel cylinder foundation trench excavates altering fill method, comprises the following steps：
(1) tugboat traction grab boat, is excavated near point, grab boat ship center line is parallel to grooving into predetermined
Axis, stem casts anchor according to construction water area condition towards the direction for advance of dredging and fixes accommodation, scoop dredger construction is used
DGPS is positioned；
(2) carry out steel cylinder foundation trench to excavate, concretely comprise the following steps：
(a) first vertical shift dredger carries out longitudinal layered excavation, folded before and after grabbing bucket in the longitudinal digging process of dredger to struggle against, when
Foundation trench excavation length more than grab boat once cast anchor the length that can be excavated when, excavated using longitudinal divisionses and section and section it
Between overlapping excavation 1.5-2m；
In longitudinal layered digging process, opened at steel cylinder foundation trench side slope position using from top to bottom stepped layering
Dig, backbreak at downstairs interior angle, owe to dig at upper ladder exterior angle, design side slope, the level of each ladder are reached using slope of collapsing naturally
Width measures control using DGPS, and reads waterlevel data by water gauge of constructing, and then controls every layer of side according to waterlevel data
Grab bucket decentralization depth when slope is excavated, the side slope of adjacent levels has the region of overlapping excavation during excavation；
(b) it is when grooving width once digs width more than dredger, dredger is traversing, then repeat described step (a)
Next bar steel cylinder foundation trench excavation construction is carried out, the excavation width of every is no more than the dredger grab bucket effective radius of clean-up of loop wheel machine
2 times, when deep water grooving is constructed, the excavation of every dig it is wide be not more than between the beam, adjacent two overlapping excavation 0.5-1m and
The side slope of adjacent strip has the region of overlapping excavation during excavation；
(3) water surface in the range of foundation trench sets segmentation cursory, then uses belt blast ship in each segmentation successively
The Cast-in-situ Piles in Sand-filling into foundation trench, in each segmentation during Cast-in-situ Piles in Sand-filling, belt blast ship is constantly mobile to change throwing position, close
Using belt blast ship ramming to designed elevation after engineered fill absolute altitude.
The beneficial effects of the invention are as follows：
(1) construction method can realize the base property for changing offshore steel cylinder structure hard foundation trench, contribute to steel to justify
The heavy construction of shaking of cylinder bank protection structure subsequently；
(2) using DGPS be located and positioned beneficial to foundation trench excavation position, it is ensured that excavate the correct of position；
(3) grab boat accommodation is arranged parallel to grooving axis, and stem is conducive to grab bucket towards the direction for advance of dredging
Movement of the dredger in work progress；
(4) every every layer during excavation, it is ensured that have the region of overlapping excavation, can prevent owe dig or leakage dig
Phenomenon, improves construction quality；
(5) constructed using grab boat, both can guarantee that construction demand, operating expenses can be effectively reduced again；
(6) foundation trench Cast-in-situ Piles in Sand-filling before backfill the water surface set segmentation it is cursory, it may be determined that construction area, it is ensured that backfill it is accurate
Property.
Brief description of the drawings
Fig. 1 is to excavate altering fill method foundation trench using the marine shallow slotting formula steel cylinder foundation trench of the present invention to excavate schematic diagram；
Fig. 2 is to excavate altering fill method grab boat and hopper using the marine shallow slotting formula steel cylinder foundation trench of the present invention
Accommodation schematic diagram；
Fig. 3 is to excavate altering fill method slope excavating layering ladder using the marine shallow slotting formula steel cylinder foundation trench of the present invention
Excavating load schematic diagram；
Fig. 4 is the hydraulic fill sand schematic diagram that altering fill method is excavated using the marine shallow slotting formula steel cylinder foundation trench of the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
The marine shallow slotting formula steel cylinder foundation trench of the present invention excavates altering fill method, including following step as shown in drawings
Suddenly：
(1) tugboat traction grab boat 1, preferred use, which is tied up, drags mode, is excavated into predetermined near point, grab bucket is dredged
The ship center line of ship 1 casts anchor and stationary boat parallel to grooving axis, stem towards the direction for advance of dredging according to construction water area condition
Position, the construction of grab boat 1 is positioned using DGPS；
(2) carry out steel cylinder foundation trench to excavate, concretely comprise the following steps：
(a) first vertical shift dredger carries out longitudinal layered excavation, folded before and after grabbing bucket in the longitudinal digging process of dredger 1 to struggle against,
When foundation trench excavation length once casts anchor the length that can be excavated more than grab boat 1, using longitudinal divisionses excavate and section with
Overlapping excavation 1.5-2m between section.So can anti-leak-stopping dig, stay the ridge and make bottom land smooth.The length of segmentation depends on positioning side
Cable length and flow direction, the length of following current construction segmentation preferably take the 75% of bow side cable initial length.Point of stage excavation
Layer number is divided according to actual cutting depth, in favor of Slope than stabilization and changeover portion slope ratio formation.
In longitudinal layered digging process, opened at steel cylinder foundation trench side slope position using from top to bottom stepped layering
Dig, 4 backbreak at downstairs interior angle, 5 are owed to dig at upper ladder exterior angle, and design side slope is reached using slope of collapsing naturally.The water of each ladder
Flat width measures control using DGPS.Due to the high change of tidal level wave, by constructing, water gauge reads waterlevel data, then according to water
Grab bucket decentralization depth when position data control every layer of slope excavating, the side slope of adjacent levels has overlapping during excavation
The region of excavation, controls construction quality.
(b) it is when grooving width once digs width more than dredger, dredger is traversing, then repeat described step (Ah)
Next bar steel cylinder foundation trench excavation construction is carried out, the excavation width of every is no more than the dredger grab bucket effective radius of clean-up of loop wheel machine
2 times, when deep water grooving is constructed, the excavation of every digs the wide no more than beam；To prevent shallow point, phase occur between adjacent two
The side slope of overlapping excavation 0.5-1m and adjacent strip has the region of overlapping excavation during excavation between adjacent two.
(3) water surface in the range of foundation trench sets segmentation cursory, then successively in each segmentation using belt blast ship 3
The Cast-in-situ Piles in Sand-filling into foundation trench, in each segmentation during Cast-in-situ Piles in Sand-filling, belt blast ship 3 is constantly mobile to change throwing position, is connecing
Using the ramming of belt blast ship 3 to designed elevation after nearly engineered fill absolute altitude.The once throwing in same scope is controlled with strict
Thickness is blocked up, causes to produce disturbance to former sea bed face mud and forms the mud bag of thickness larger (more than 2m).
Embodiment 1
(1) tugboat, which uses to tie up, drags mode traction grab boat 1, is excavated into predetermined near point, the ship of grab boat 1
Center line casts anchor according to construction water area condition towards the direction for advance of dredging parallel to grooving axis, stem and fixes accommodation, grab bucket
The construction of dredger 1 is positioned using DGPS；
(2) carry out steel cylinder foundation trench to excavate, concretely comprise the following steps：
(a) first longitudinal point of 3 layers of excavation of vertical shift dredger progress, grab bucket front and rear folded bucket in the digging process of the longitudinal direction of dredger 1,
Once cast anchor the length that can excavate by foundation trench excavation length exceedes grab boat 1, using longitudinal divisionses excavation and section and
Overlapping excavation 1.5m between section.The length of following current construction segmentation takes the 75% of bow side cable initial length.
In longitudinal layered digging process, opened at steel cylinder foundation trench side slope position using from top to bottom stepped layering
Dig, 4 backbreak at downstairs interior angle, 5 are owed to dig at upper ladder exterior angle, and design side slope is reached using slope of collapsing naturally.The water of each ladder
Flat width measures control using DGPS.Due to the high change of tidal level wave, by constructing, water gauge reads waterlevel data, then according to water
Grab bucket decentralization depth when position data control every layer of slope excavating, the side slope of adjacent levels has overlapping during excavation
The region of excavation, controls construction quality.
(b) it is when once digging width more than dredger due to grooving width, dredger is traversing, then repeat described step
(Ah) carries out next bar steel cylinder foundation trench excavation construction, and the excavation width of every is no more than the effectively work half of dredger grab bucket loop wheel machine
2 times of footpath, when deep water grooving is constructed, the excavation of every digs the wide no more than beam；Overlapping excavation 0.5m between adjacent two
And the side slope of adjacent strip has the region of overlapping excavation during excavation.
(3) water surface in the range of foundation trench sets segmentation cursory, then successively in each segmentation using belt blast ship 3
The Cast-in-situ Piles in Sand-filling into foundation trench, in each segmentation during Cast-in-situ Piles in Sand-filling, belt blast ship 3 is constantly mobile to change throwing position, is connecing
Using the ramming of belt blast ship 3 to designed elevation after nearly engineered fill absolute altitude.
The accuracy of foundation trench excavation has been effectively ensured using this method, guarantee is provided for successive projects construction.
Embodiment 2
(1) tugboat, which uses to tie up, drags mode traction grab boat 1, is excavated into predetermined near point, the ship of grab boat 1
Center line casts anchor according to construction water area condition towards the direction for advance of dredging parallel to grooving axis, stem and fixes accommodation, grab bucket
The construction of dredger 1 is positioned using DGPS；
(2) carry out steel cylinder foundation trench to excavate, concretely comprise the following steps：
(a) first longitudinal point of 3 layers of excavation of vertical shift dredger progress, grab bucket front and rear folded bucket in the digging process of the longitudinal direction of dredger 1,
Once cast anchor the length that can excavate by foundation trench excavation length exceedes grab boat 1, using longitudinal divisionses excavation and section and
Overlapping excavation 2m between section.The length of following current construction segmentation takes the 75% of bow side cable initial length.
In longitudinal layered digging process, opened at steel cylinder foundation trench side slope position using from top to bottom stepped layering
Dig, 4 backbreak at downstairs interior angle, 5 are owed to dig at upper ladder exterior angle, and design side slope is reached using slope of collapsing naturally.The water of each ladder
Flat width measures control using DGPS.Due to the high change of tidal level wave, by constructing, water gauge reads waterlevel data, then according to water
Grab bucket decentralization depth when position data control every layer of slope excavating, the side slope of adjacent levels has overlapping during excavation
The region of excavation, controls construction quality.
(b) it is when once digging width more than dredger due to grooving width, dredger is traversing, then repeat described step
(Ah) carries out next bar steel cylinder foundation trench excavation construction, and the excavation width of every is no more than the effectively work half of dredger grab bucket loop wheel machine
2 times of footpath, when deep water grooving is constructed, the excavation of every digs the wide no more than beam；Between adjacent two overlapping excavation 1m and
The side slope of adjacent strip has the region of overlapping excavation during excavation.
(3) water surface in the range of foundation trench sets segmentation cursory, then successively in each segmentation using belt blast ship 3
The Cast-in-situ Piles in Sand-filling into foundation trench, in each segmentation during Cast-in-situ Piles in Sand-filling, belt blast ship 3 is constantly mobile to change throwing position, is connecing
Using the ramming of belt blast ship 3 to designed elevation after nearly engineered fill absolute altitude.
The accuracy of foundation trench excavation has been effectively ensured using this method, guarantee is provided for successive projects construction.
Embodiment 3
(1) tugboat, which uses to tie up, drags mode traction grab boat 1, is excavated into predetermined near point, the ship of grab boat 1
Center line casts anchor according to construction water area condition towards the direction for advance of dredging parallel to grooving axis, stem and fixes accommodation, grab bucket
The construction of dredger 1 is positioned using DGPS；
(2) carry out steel cylinder foundation trench to excavate, concretely comprise the following steps：
(a) first longitudinal point of 3 layers of excavation of vertical shift dredger progress, grab bucket front and rear folded bucket in the digging process of the longitudinal direction of dredger 1,
Once cast anchor the length that can excavate by foundation trench excavation length exceedes grab boat 1, using longitudinal divisionses excavation and section and
Overlapping excavation 1.8m between section.The length of following current construction segmentation takes the 75% of bow side cable initial length.
In longitudinal layered digging process, opened at steel cylinder foundation trench side slope position using from top to bottom stepped layering
Dig, 4 backbreak at downstairs interior angle, 5 are owed to dig at upper ladder exterior angle, and design side slope is reached using slope of collapsing naturally.The water of each ladder
Flat width measures control using DGPS.Due to the high change of tidal level wave, by constructing, water gauge reads waterlevel data, then according to water
Grab bucket decentralization depth when position data control every layer of slope excavating, the side slope of adjacent levels has overlapping during excavation
The region of excavation, controls construction quality.
(b) it is when once digging width more than dredger due to grooving width, dredger is traversing, then repeat described step
(Ah) carries out next bar steel cylinder foundation trench excavation construction, and the excavation width of every is no more than the effectively work half of dredger grab bucket loop wheel machine
2 times of footpath, when deep water grooving is constructed, the excavation of every digs the wide no more than beam；Overlapping excavation 0.7m between adjacent two
And the side slope of adjacent strip has the region of overlapping excavation during excavation.
(3) water surface in the range of foundation trench sets segmentation cursory, then successively in each segmentation using belt blast ship 3
The Cast-in-situ Piles in Sand-filling into foundation trench, in each segmentation during Cast-in-situ Piles in Sand-filling, belt blast ship 3 is constantly mobile to change throwing position, is connecing
Using the ramming of belt blast ship 3 to designed elevation after nearly engineered fill absolute altitude.
The accuracy of foundation trench excavation has been effectively ensured using this method, guarantee is provided for successive projects construction.
Claims (2)
1. marine shallow slotting formula steel cylinder foundation trench excavates altering fill method, it is characterised in that comprise the following steps：
(1) tugboat traction grab boat, is excavated near point, grab boat ship center line is parallel to grooving axle into predetermined
Line, stem casts anchor according to construction water area condition towards the direction for advance of dredging and fixes accommodation, scoop dredger construction is used
DGPS is positioned；
(2) carry out steel cylinder foundation trench to excavate, concretely comprise the following steps：
(a) first vertical shift dredger carries out longitudinal layered excavation, folded before and after grabbing bucket in the longitudinal digging process of dredger to struggle against, and works as foundation trench
Excavation length more than grab boat once cast anchor the length that can be excavated when, using longitudinal divisionses excavate and between section and section weight
It is folded to excavate 1.5-2m；
In longitudinal layered digging process, from top to bottom stepped stage excavation is used at steel cylinder foundation trench side slope position,
Backbreak at downstairs interior angle, owe to dig at upper ladder exterior angle, design side slope, the horizontal width of each ladder are reached using slope of collapsing naturally
Measured and controlled using DGPS, and waterlevel data is read by water gauge of constructing, then control every layer of side slope to open according to waterlevel data
Grab bucket decentralization depth during digging, the side slope of adjacent levels has the region of overlapping excavation during excavation；
(b) it is when grooving width once digs width more than dredger, dredger is traversing, then repeat described step (a) and carry out
Next bar steel cylinder foundation trench excavation construction, 2 times of excavation width no more than the dredger grab bucket effective radius of clean-up of loop wheel machine of every,
When deep water grooving is constructed, the excavation of every, which is dug, wide is not more than between the beam, adjacent two overlapping excavation 0.5-1m and adjacent
The side slope of bar has the region of overlapping excavation during excavation；
(3) water surface in the range of foundation trench sets segmentation cursory, then uses belt blast ship to base in each segmentation successively
Cast-in-situ Piles in Sand-filling in groove, in each segmentation during Cast-in-situ Piles in Sand-filling, belt blast ship is constantly mobile to change throwing position, in close design
Backfill after absolute altitude using belt blast ship ramming to designed elevation.
2. the shallow slotting formula steel cylinder foundation trench in sea according to claim 1 excavates altering fill method, it is characterised in that：Following current
The length of construction segmentation takes the 75% of bow side cable initial length.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710293740.2A CN107034906A (en) | 2017-04-28 | 2017-04-28 | Marine shallow slotting formula steel cylinder foundation trench excavates altering fill method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710293740.2A CN107034906A (en) | 2017-04-28 | 2017-04-28 | Marine shallow slotting formula steel cylinder foundation trench excavates altering fill method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350162A (en) * | 2020-03-03 | 2020-06-30 | 河海大学 | Grooving design method for restoring reservoir capacity in front of deep groove reservoir dam of high beach |
| CN112502658A (en) * | 2020-10-19 | 2021-03-16 | 中海石油(中国)有限公司 | Installation method of oil gas production wet type protection structure located under seabed mud surface |
| CN113585346A (en) * | 2021-08-13 | 2021-11-02 | 中南大学 | Immersed tube foundation tank treatment process and immersed tube installation process for offshore inland river junction area |
-
2017
- 2017-04-28 CN CN201710293740.2A patent/CN107034906A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 周伟等: "基槽及后方挖泥与清淤工程", 《华南港工》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350162A (en) * | 2020-03-03 | 2020-06-30 | 河海大学 | Grooving design method for restoring reservoir capacity in front of deep groove reservoir dam of high beach |
| CN111350162B (en) * | 2020-03-03 | 2021-03-19 | 河海大学 | Grooving design method for restoring reservoir capacity in front of deep groove reservoir dam of high beach |
| CN112502658A (en) * | 2020-10-19 | 2021-03-16 | 中海石油(中国)有限公司 | Installation method of oil gas production wet type protection structure located under seabed mud surface |
| CN113585346A (en) * | 2021-08-13 | 2021-11-02 | 中南大学 | Immersed tube foundation tank treatment process and immersed tube installation process for offshore inland river junction area |
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Application publication date: 20170811 |
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