CN110541441A - Construction method for retreating and dredging cutter suction dredger - Google Patents
Construction method for retreating and dredging cutter suction dredger Download PDFInfo
- Publication number
- CN110541441A CN110541441A CN201910876623.8A CN201910876623A CN110541441A CN 110541441 A CN110541441 A CN 110541441A CN 201910876623 A CN201910876623 A CN 201910876623A CN 110541441 A CN110541441 A CN 110541441A
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- construction
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- dredging
- ship
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8833—Floating installations
- E02F3/885—Floating installations self propelled, e.g. ship
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
Abstract
the invention relates to a construction method for retreating and dredging a cutter-suction dredger, which comprises the steps of dividing a construction area into a plurality of sections according to the length of the construction area and the length of a construction hull and excavating under the condition that the construction area is longer than the length of the construction hull and the excavating depth is longer than the length of a positioning steel pile, ensuring that the excavating length of each section is shorter than the construction safety length of the construction hull and the positioning steel pile does not enter a deep water area, excavating the construction area by operating an anchor boat, an anchor, a mud pump, a positioning steel pile, an auxiliary steel pile, a reamer, a winch, a trolley and a bridge frame, wherein the excavating operation comprises calculation, positioning, lower reamer, transverse dredging, sideline reversing, pile reversing, anchor moving and ship moving, excavating the last section of the construction area first, and analogizing the last section of excavating on the last section of the construction area. The invention provides a construction method for retreating and dredging a cutter-suction dredger, which is used for clearing sludge in a river channel by the construction method for retreating and dredging and solves the problem that a construction ship body cannot be well positioned and constructed in a deep area due to the short steel pile.
Description
Technical Field
The invention relates to the related technical field of dredging engineering, in particular to a construction method for backing and dredging a cutter suction dredger.
background
The change of ecological environment and the water and soil loss cause the siltation of rivers and lakes, and a large number of dredging construction ships are needed for dredging the river channels, developing shipping, treating flood and the like.
At present, when the cutter suction dredger is constructed in a deep water area, the cutter suction dredger often encounters the problem that a positioning steel pile is short and the dredging depth is large, when the positioning steel pile cannot be inserted into the mud on the seabed along with the advancing of dredging, the positioning of a construction ship body cannot be realized, the construction cannot be carried out, and the hidden danger that the positioning steel pile falls off and enters the deep water area is also prevented.
disclosure of Invention
In order to solve the problems in the prior art, the invention provides a construction method for the retreating dredging of a cutter-suction dredger, which is used for clearing sludge in a river channel by the construction method for the retreating dredging and solves the problem that a construction ship body cannot be well positioned and constructed in a deep area due to the short steel pile.
In order to achieve the purpose, the invention adopts the technical scheme that: a construction method for back-stepping dredging of a cutter suction dredger comprises the following construction steps:
(1) Calculating the size of a construction area, dividing the construction area into a plurality of sections of working areas for excavation according to the length of the construction area and the length of a construction ship body, wherein the excavation length of each section is smaller than the construction safety length of the construction ship body, meanwhile, a positioning steel pile does not enter a deep water area, and the width of the construction area is smaller than a preset interval of the construction ship body safety construction area;
The following actions (2) to (4) are executed for the current working area;
(2) positioning, namely anchoring the construction ship on the center line of a construction area, enabling the reamer to be flush with the initial position of the current working area section, enabling the positioning steel pile at the stern of the construction ship to act downwards, positioning the construction ship, driving the construction ship head to rotate through the anchor boat, and tightening and fixing the construction ship by using the anchor;
(3) After the positioning is finished, the construction ship starts to drive the reamer downwards through the bridge, the reamer is driven by the hydraulic machine to rotate and moves downwards to a depth to be excavated below a mud layer, and a suction port of a mud pump below the reamer is driven to suck away mud on a horizontal plane where the depth to be excavated is located;
(4) When the reamer reaches the depth to be excavated, construction and mud excavation are started, and the operation of the current working area is completed through four procedures of transverse moving mud excavation, side line reversing, pile reversing and anchor moving in a reciprocating cycle manner;
(5) After the work area in the step (4) finishes the operation, moving the construction ship, taking the rear work area of the finished work area as the current work area, repeating the actions (2), (3) and (4) until the current work area is communicated with the previous work area which finishes the operation, and stopping the operation;
(6) and (5) repeating the steps (2), (3), (4) and (5) to carry out the step-back dredging construction on the multiple sections of the construction area until the construction is finished.
Preferably, the reamer is controlled to rotate by a hydraulic machine and the rotating speed is 25-33 r/min.
In any of the above aspects, preferably, the positioning specifically includes the steps of:
firstly, stopping the construction ship on a central line of an area to be excavated, enabling a reamer to be flush with an initial section of the section to be excavated, and fixing a construction stern by a lower positioning steel pile;
Secondly, the positioning steel pile at the stern of the construction is taken as an axis, the construction bow is driven by the anchor boat to rotate clockwise, when the construction bow reaches a right side line, the anchor is simultaneously pulled down, the left transverse cable and the anchor cable are simultaneously pulled up, the left transverse cable and the anchor cable are fastened, and the left transverse cable has a limiting effect;
and after the right side is fastened, the anchor boat drives the construction bow to rotate anticlockwise, when the construction bow reaches the left side line, the lower anchor simultaneously fastens the right transverse moving cable and the anchor cable, and the right transverse moving cable and the anchor cable on the right side play a limiting role.
In any of the above schemes, preferably, the traversing dredging body comprises a reamer which is opened and a right traversing cable is retracted, the reamer rotates clockwise to the right side line along with the construction bow, and the construction bow is in an arc-shaped operation range.
in any of the above schemes, preferably, the side line reversing specifically includes stopping swinging the construction vessel after the construction bow is close to the right side line, starting the trolley on the positioning steel pile to advance a little, retracting the left transverse movement cable after the advance is completed, rotating the reamer to the left side line along with the construction bow anticlockwise, and so on, and stopping the trolley when the trolley advances to the measuring range.
in any of the above schemes, preferably, the pile reversing specifically includes stopping swinging the construction vessel after the trolley reaches the range, retracting the positioning steel pile by the lower auxiliary steel pile, then returning the trolley to zero, retracting the auxiliary steel pile by the lower positioning steel pile, and repeatedly performing transverse movement and side line reversing.
In any of the above schemes, preferably, the anchor cable, the left traverse cable and the right traverse cable have an included angle of less than 40 degrees with the axis of the construction vessel, and when the included angle between the construction vessel and the traverse cable is close to 40 degrees, the anchor cable, the right traverse cable and the left traverse cable are withdrawn through the anchor boat, and the construction vessel position is fixed left and right through the anchor boat again.
In any of the above schemes, preferably, the moving construction vessel includes that after the construction of the current working area is completed, the previous area of the moving construction vessel needs to be constructed, the left and right lateral moving anchors are retracted, the bridge frame is lifted to the area above the mud, and the anchor handling boat drags the mud dredging construction vessel to a new area for construction.
In any of the above schemes, preferably, the dredge pump comprises an underwater pump, a pump in a construction cabin and a pipeline, the flow rate of the underwater pump and the dredge pump is controlled within 4.5-5.2m/s during dredging, the total pressure is controlled within 9 kg, and the vacuum of the underwater pump is controlled within-0.6-0.8.
Compared with the prior art, the construction method for the retreating dredging of the cutter suction dredger has the following beneficial effects:
The method for the retreating dredging construction has the advantages that the dredging depth is large, the limitation of the length of the steel pile can be avoided, the maximum dredging depth of the construction ship is met, and meanwhile, the adverse factors such as sinking of the steel pile or inaccurate positioning of the steel pile, which are easily caused in the dredging construction, are effectively avoided; the construction section is excavated under the circulating action of transverse moving, dredging, side line reversing, pile reversing and anchor moving, the excavation is accurate, the construction ship is moved to the next construction area after excavation, the step-back dredging is carried out, the influence of a deep water area on the positioning steel pile is perfectly avoided, and the construction is normally carried out.
Drawings
FIG. 1 is a schematic view of a third positioning stage of the construction method for the retreating dredging of the cutter suction dredger according to the present invention;
FIG. 2 is a third construction schematic diagram of the construction method of the cutter suction dredger for back-stepping dredging provided by the invention;
FIG. 3 is a schematic view of a second stage of positioning of the construction method of the cutter suction dredger for retreating dredging provided by the invention;
FIG. 4 is a schematic diagram of a second stage of construction of the construction method of the cutter suction dredger for back-stepping dredging provided by the invention;
FIG. 5 is a schematic view of the positioning of the first section of the construction method of the cutter suction dredger for back-stepping dredging provided by the invention;
FIG. 6 is a schematic construction diagram of a first section of a construction method for backing and dredging a cutter suction dredger provided by the invention;
FIG. 7 is a schematic view of a cutter suction construction vessel provided in accordance with the present invention;
FIG. 8 is a flow chart of a construction method of the cutter suction dredger retreating dredging provided by the invention.
Detailed Description
in order that the invention may be further understood, the invention will now be described in detail with reference to specific examples.
as shown in fig. 1-8, according to an embodiment of the construction method for the cutter suction dredger to retreat and dredge provided by the invention, in this embodiment, the length of the construction ship body is 108 meters, the width of the construction ship is 18.2 meters, the profile depth is 5.2 meters, and according to engineering characteristics and the design parameter requirements of the construction ship, the length of a designed construction area is 200 meters, the width is 110 meters, and the water depth after dredging is-25 meters.
In the embodiment, according to the length of a construction area and a construction ship body, the length of the ship is 108 meters, the distance between a positioning steel pile and a trolley is 90 meters when the winch head reaches the maximum digging depth of the ship, the length of a trolley is 6 meters, the remaining safe construction distance of the trolley is reduced by 6 meters, 4 meters of margin is needed to prevent the collapse and other dangers caused by soft seabed mud, so that the steel pile does not enter a deep water area of a digging groove to cause sinking of the steel pile or tripping of a commanding rope, and the remaining 80 meters of 4 meters are reduced by 84 meters of the safe construction length of each section, so that the digging groove with the length of 200 meters is divided into three sections of construction, 80 meters in two sections and 40 meters in one section.
In the above embodiment, the width is 0 m on the left and 110 m on the right.
In the above embodiment, the maximum depth of the construction vessel is-26.5 m, and the full-vessel pressurized water loading increases the draft of the vessel, and the actual maximum depth of the vessel is-27.5 m, so that the depth of the dredged water is-25 m.
In the above embodiment, as shown in fig. 1 to 6, after the ship moves forward by 80 meters to reach the end point, since the ship length is 108 meters, the stern steel pile does not enter the deep groove yet, then the ship moves backward by 160 meters to start the construction of the second section, and after the second section is jointed with the third section, the ship moves backward by 120 meters to construct the first section, so that the steel pile does not enter the trenching deep water area all the time, and the safety of the steel pile in the deep water construction of the ship is effectively ensured.
Drawing a central line at the position of 55 m wide of a construction area which is a long strip with the length of 200 m and the width of 110 m, moving a construction ship to the starting position of the construction area, leveling a reamer at the head of the construction ship to the starting position of the construction and just positioning the reamer at the position of the central line of 55 m, and placing a positioning steel pile to position the construction ship; then, after the anchor boat takes the positioning steel pile at the construction stern as an axis to jack the construction bow to the right side of 110 m side lines in the clockwise direction, the right side is transversely moved, the transverse cables and the anchor cables are timely sent out, and the transverse cables and the anchor cables are tightened to fix the construction position after the anchor reaches the bottom; and then, jacking the construction bow to the left line 0 meter from the right side 110 meter side line to the left side in the anticlockwise direction by using an anchor boat, transversely moving the anchor at the lower left side, timely sending out the transverse moving cable and the anchor cable, and tightening and fixing the transverse moving cable and the anchor cable on the construction ship position after the anchor is anchored to the bottom.
After the position of the construction ship is determined, the bridge frame is lowered to the water depth of-22.5 meters, the bridge frame is lowered to the left side line of the construction strip by 0 meter, the reamer is started to rotate clockwise, the right transverse cable is reeled, the silt cut by the reamer at the head of the construction ship moves clockwise slowly, the suction port of the dredge pump is arranged below the reamer, and the silt ground by the reamer is blown to the land by the suction pipeline, so that the dredge is realized by positive cutter dredging of the construction ship.
In the above embodiment, the bridge operating handle is arranged in the cabin of the construction ship, and the bridge lifting handle is operated to lower and lift the reamer to a required position. The control handle is pushed up, pulled down and braked in the middle; the lifting speed of the bridge frame is controlled by a hydraulic speed regulating handle.
In the previous embodiment, the control handles of the traversing winch are respectively arranged on the left and right driving platforms, the left control handle controls the reamer to twist leftwards and to be linked when being matched with right twisting, and the right side is opposite to the left control handle; the traversing speed is controlled by a hydraulic speed-regulating handle.
In the last embodiment, the rotating speed of the reamer is 25-30rpm/min so as to increase the soil breaking capacity of the reamer, facilitate conveying and reduce the probability of a pump blocking a port.
and after the reamer moves to the position 110 meters away from the right sideline, the right side transverse movement is stopped, and because the cutter is dug out, a next cutter needs to be dug further, a trolley hydraulic cylinder on a positioning steel pile at the tail of the construction ship advances for 1.5 meters, each stroke of the trolley is 6 meters, and a trolley operating rod of the driving platform pushes forwards for 1.5 meters. After the progress is completed, the cable is transversely moved on the left side, the cutter knife at the head of the construction ship cuts silt and slowly moves towards the left side in the anticlockwise direction, a mud pump suction port is arranged below the cutter knife, the silt minced by the cutter knife is blown to the land by a suction pipeline, and the mud is excavated by the reverse cutter of the construction ship, and the rest is done by analogy.
in the above embodiment, after the trolley reaches the range, the swing of the construction vessel is stopped, the positioning steel pile is retracted by the lower auxiliary steel pile, then the trolley returns to zero, the auxiliary steel pile is retracted by the lower positioning steel pile, and the transverse movement and the side line reversing are repeatedly performed.
In the above embodiment, the reamer is preferably advanced on the side line when the construction vessel advances, and the reamer is preferably advanced while being reamed without stopping rotation during the advancement.
In the above embodiment, the trolley operating button is arranged in the construction vessel cabin and is respectively provided with three gears of forward, backward and stop, the trolley is retracted when being pressed to the left (facing the operating button), the trolley is pushed when being pressed to the right, and the trolley is stopped when being pressed to the neutral. The power of the trolley is driven by hydraulic pressure, and the driving pressure is 210kg/cm 2.
The included angles between the anchor cable, the left transverse moving cable and the construction ship axis are smaller than 40 degrees, when the included angle between the construction ship and the transverse moving cable is close to 40 degrees, the anchor cable, the right transverse moving cable and the left transverse moving cable need to be withdrawn through the anchor boat, and the construction ship position is fixed through the left and right sides of the anchor boat again.
in the last embodiment, the anchor moving is generally carried out after the last dredging section of the 5-6 trolley strokes is closed.
after the construction ship finishes one area, the construction ship needs to be moved to carry out construction of the next area, if the construction ship is moved to the adjacent area, the construction ship can be moved in and out to a new area mud digging starting point by a trolley, and then a transverse anchor is used for moving the construction bow and an anchor boat to assist in moving the construction stern to be on-line; laying transverse moving anchors and carrying out anchor moving procedures. If the distance of the construction ship is far, the left and right transverse anchors are retracted, the bridge frame is lifted to a certain height, and the dredger is dragged to a new construction site by using an anchor lifting boat or a tugboat.
Compared with the prior art, the embodiment has the following beneficial effects:
The method for the retreating dredging construction has the advantages that the dredging depth is large, the limitation of the length of the steel pile can be avoided, the maximum dredging depth of the construction ship is met, and meanwhile, the adverse factors such as sinking of the steel pile or inaccurate positioning of the steel pile, which are easily caused in the dredging construction, are effectively avoided; the construction section is excavated under the circulating action of transverse moving, dredging, side line reversing, pile reversing and anchor moving, the excavation is accurate, the construction ship is moved to the next construction area after excavation, the step-back dredging is carried out, the influence of a deep water area on the positioning steel pile is perfectly avoided, and the construction is normally carried out.
It will be understood by those skilled in the art that the present invention includes any combination of the summary and detailed description of the invention described above and those illustrated in the accompanying drawings, which is not intended to be limited to the details and which, for the sake of brevity of this description, does not describe every aspect which may be formed by such combination. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. a construction method for retreating and dredging of a cutter suction dredger is characterized in that a dredging operation is carried out in a construction area, and the construction method comprises the following construction steps:
(1) Calculating the size of a construction area, dividing the construction area into a plurality of sections of working areas for excavation according to the length of the construction area and the length of a construction ship body, wherein the excavation length of each section is smaller than the construction safety length of the construction ship body, meanwhile, a positioning steel pile does not enter a deep water area, and the width of the construction area is smaller than a preset interval of the construction ship body safety construction area;
The following actions (2) to (4) are executed for the current working area;
(2) Positioning, namely anchoring the construction ship on the center line of a construction area, enabling the reamer to be flush with the initial position of the current working area section, enabling the positioning steel pile at the stern of the construction ship to act downwards, positioning the construction ship, driving the construction ship head to rotate through the anchor boat, and tightening and fixing the construction ship by using the anchor;
(3) after the positioning is finished, the construction ship starts to drive the reamer downwards through the bridge, the reamer is driven by the hydraulic machine to rotate and moves downwards to a depth to be excavated below a mud layer, and a suction port of a mud pump below the reamer is driven to suck away mud on a horizontal plane where the depth to be excavated is located;
(4) When the reamer reaches the depth to be excavated, construction and mud excavation are started, and the operation of the current working area is completed through four procedures of transverse moving mud excavation, side line reversing, pile reversing and anchor moving in a reciprocating cycle manner;
(5) After the work area in the step (4) finishes the operation, moving the construction ship, taking the rear work area of the finished work area as the current work area, repeating the actions (2), (3) and (4) until the current work area is communicated with the previous work area which finishes the operation, and stopping the operation;
(6) And (5) repeating the steps (2), (3), (4) and (5) to carry out the step-back dredging construction on the multiple sections of the construction area until the construction is finished.
2. the construction method for the retreating dredging of the cutter suction dredger according to claim 1, characterized in that: the reamer is controlled by a hydraulic machine to rotate at the rotating speed of 25-33 r/min.
3. the construction method for the retreating dredging of the cutter suction dredger according to claim 1, characterized in that: the positioning specifically comprises the following steps:
Firstly, stopping the construction ship on a central line of an area to be excavated, enabling a reamer to be flush with an initial section of the section to be excavated, and fixing a construction stern by a lower positioning steel pile;
secondly, the positioning steel pile at the stern of the construction is taken as an axis, the construction bow is driven by the anchor boat to rotate clockwise, when the construction bow reaches a right side line, the anchor is simultaneously pulled down, the left transverse cable and the anchor cable are simultaneously pulled up, the left transverse cable and the anchor cable are fastened, and the left transverse cable has a limiting effect;
And after the right side is fastened, the anchor boat drives the construction bow to rotate anticlockwise, when the construction bow reaches the left side line, the lower anchor simultaneously fastens the right transverse moving cable and the anchor cable, and the right transverse moving cable and the anchor cable on the right side play a limiting role.
4. the construction method for the retreating dredging of the cutter suction dredger according to claim 1, characterized in that: the sideslip dredging specifically includes, opens the reamer, receives right sideslip hawser, and the reamer is along with construction bow clockwise rotation to right sideline department, and the construction bow is arc operating range.
5. the construction method for the retreating dredging of the cutter suction dredger according to claim 4, characterized in that: the side line reversing specifically comprises the steps that after the construction bow is close to the right side line, the construction ship stops swinging, the trolley on the positioning steel pile is started to move forward a little, after the forward movement is completed, the left transverse moving cable is drawn, the reamer rotates anticlockwise to the left side line along with the construction bow, and the like, and the trolley moves forward to the measuring range and stops.
6. the construction method for the retreating dredging of the cutter suction dredger according to claim 5, characterized in that: the pile reversing tool comprises a trolley, a construction ship, a lower auxiliary steel pile, a positioning steel pile, a trolley, a lower positioning steel pile, an auxiliary steel pile, a transverse moving part and a side line reversing part, wherein the trolley stops swinging the construction ship after reaching a measuring range, the positioning steel pile is folded down, the trolley returns to zero, the lower positioning steel pile is folded up, and the transverse moving part and the side line reversing part are repeatedly carried out.
7. the construction method for the retreating dredging of the cutter suction dredger according to claim 1, characterized in that: the included angle between the anchor cable, the left transverse cable and the right transverse cable and the axis of the construction ship is smaller than 40 degrees, when the included angle between the construction ship and the transverse cable is close to 40 degrees, the anchor cable, the right transverse cable and the left transverse cable are withdrawn through the anchor boat, and the construction ship position is fixed left and right through the anchor boat.
8. the construction method for the retreating dredging of the cutter suction dredger according to claim 1, characterized in that: and the construction ship moving tool comprises the steps of constructing the previous section of the construction ship after the construction of the current section of the construction ship is completed, retracting the left and right transverse moving anchors, lifting the bridge frame to the area on the mud, and using the anchor lifting boat to drag the mud dredging construction ship to a new area for construction.
9. The construction method for the retreating dredging of the cutter suction dredger according to claim 1, characterized in that: the mud pump comprises an underwater pump, a pump in a construction cabin and a pipeline, the flow speed of the underwater pump and the mud pump is controlled within 4.5-5.2m/s during mud digging, the total pressure is controlled within 9 kilograms, and the vacuum of the underwater pump is controlled within-0.6 to-0.8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910876623.8A CN110541441A (en) | 2019-09-17 | 2019-09-17 | Construction method for retreating and dredging cutter suction dredger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910876623.8A CN110541441A (en) | 2019-09-17 | 2019-09-17 | Construction method for retreating and dredging cutter suction dredger |
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| CN110541441A true CN110541441A (en) | 2019-12-06 |
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| CN201910876623.8A Pending CN110541441A (en) | 2019-09-17 | 2019-09-17 | Construction method for retreating and dredging cutter suction dredger |
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| CN115094967B (en) * | 2022-06-17 | 2024-01-16 | 江苏筑港建设集团有限公司 | Dredger dredging construction method for cutter suction dredger |
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Application publication date: 20191206 |
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| RJ01 | Rejection of invention patent application after publication |