CN113356137A - Efficient and accurate deep-water throwing construction method for sand bags for river underwater bank protection - Google Patents
Efficient and accurate deep-water throwing construction method for sand bags for river underwater bank protection Download PDFInfo
- Publication number
- CN113356137A CN113356137A CN202110647466.0A CN202110647466A CN113356137A CN 113356137 A CN113356137 A CN 113356137A CN 202110647466 A CN202110647466 A CN 202110647466A CN 113356137 A CN113356137 A CN 113356137A
- Authority
- CN
- China
- Prior art keywords
- throwing
- sand
- barge
- sandbag
- layer
- 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.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/127—Flexible prefabricated covering elements, e.g. mats, strips bags filled at the side
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
Landscapes
- Engineering & Computer Science (AREA)
- General 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)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The invention discloses a high-efficiency and accurate deepwater throwing construction method for sand bags for river underwater bank protection, which belongs to the field of hydraulic engineering construction, and comprises the steps of firstly carrying out layered design, partition and cell throwing sequence design on throwing areas; according to the empirical formula of the throwing and falling distance of the sandbags
Positioning and anchoring the positioning barge, and berthing the sand carrier and the bottom-opening barge at two sides; then hydraulically scouring sand to make slurry in a sand transporting ship, and pumping the slurry to a bottom-opening barge by a slurry pump through a positioning ship; filling sandbags in layers in a bottom-opening barge, stacking the sandbags layer by layer into a V shape, then opening the bottom of the barge, throwing the sandbags, and monitoring and comparing corresponding underwater sections; and (4) shifting the barge to the next subarea according to the layered subarea design, and repeating the steps until the full-face throwing is completed. The invention can fill and throw a large amount of sandbags at one time, and has construction effectThe rate is high; the sand bag throwing pile forming quality is guaranteed by adopting a control method combining throwing partition layer design, partition design, flat layer throwing sequence design, a pre-throwing correction drop distance formula and underwater section dynamic monitoring.
Description
Technical Field
The invention belongs to the field of hydraulic engineering construction, and particularly relates to a construction method for efficient and accurate deep water throwing of sand bags for river underwater bank protection.
Background
In the past big river and big river control, the underwater bank slope protection is mostly protected by riprap. In recent years, geotextile filled sandbags (hereinafter referred to as sandbags) underwater bank protection structures have the advantages of local materials, high construction efficiency, low manufacturing cost and the like, and can replace riprap in partial areas, be applied to local protection of underwater slope toe, but cannot be applied to large-scale protection of underwater bank slopes.
The main reasons for limiting the popularization and application of the novel environmental protection technology of underwater sandbag bank protection are as follows: when underwater bank slope protection is carried out, a bank protection structure with a certain slope is required to be constructed, and the falling point of the sand bag can be accurately controlled in the construction process.
When the sandbags are thrown in deep water in the past, the drop points of the sandbags are difficult to predict effectively, so that the thrown sandbags cannot be stacked according to the assumption to form a designed section; in order to form a bank protection pile body and ensure that the pile body reaches the designed elevation, the actual sand bag throwing amount is often far larger than the designed amount; and the uncontrollable sandbag pile body forming process also makes the quality of the revetment structure difficult to effectively ensure.
In addition, a flap throwing barge is generally adopted in the prior sandbag throwing construction, and the throwing method using the barge has the following defects: the one-time throwing amount is small, and the construction speed is low; the initial speed perpendicular to the water flow direction is adopted when the sandbag is thrown, so that the difficulty in predicting the drop point of the sandbag is increased; the size and the supporting strength of the turning plate are limited, so that the size of the sand bag for underwater bank protection is limited.
In conclusion, the existing sand bag underwater bank protection construction method is low in efficiency and difficult to realize deep water accurate throwing.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects of the prior art and provides a high-efficiency and accurate deep-water throwing construction method for the sand bag for river underwater bank protection, which is high in construction efficiency and high in safety.
The technical scheme is as follows: in order to realize the purpose, the invention adopts the following technical scheme:
a construction method for high-efficiency and accurate deep water throwing of sand bags for river underwater bank protection comprises the following steps:
1) carrying out layered design, partition design and cell throwing sequence design on the sandbag throwing area;
2) selecting a positioning barge position according to a partitioning arrangement and an empirical formula of sandbag throwing and dropping distances, and berthing the sandship and the throwing barge at two sides by anchoring;
3) correcting the coefficient of a casting and dropping distance empirical formula according to the drift of the casting sandbag measured on site to obtain the actually adopted coefficient, and adjusting the position of the positioning barge;
4) carrying out hydraulic sand flushing and slurry making in a sand transport ship, and pumping to a throwing barge by using a slurry pump through a positioning barge;
5) filling sandbags in a throwing barge layer by layer, stacking the sandbags layer by layer into a V shape, then opening the throwing barge, throwing the sandbags, and monitoring corresponding underwater sections;
6) and (3) shifting the positioning barge and the throwing barge to the next subarea according to the construction layered subarea design, and repeating the barge positioning, adjusting, sandbag filling and sandbag throwing processes in the steps 2) to 5) until the full-section sandbag throwing construction is completed.
Further, in the step 2), the formula of the casting drop distance is
Comprehensively analyzing results of a sandbag throwing water tank model test and a field throwing sandbag drifting and falling distance test, wherein S is a downstream drifting distance (m); hdSinking to the depth of water (m); v is the water flow velocity (m); delta is sandbag floating specific gravity (-); g is gravity acceleration (m/s)2) (ii) a C is the perimeter (m) of the sandbag; k. b (-) is the coefficient of empirical formula.
Further, in step 2), the values of k and b are shown in the following table:
| slope of slope | k | b |
| Without side slope | 1.757 | 0.206 |
| 1:3 | 0.733 | 0.743 |
| 1:2.5 | 2.519 | 0.232 |
| 1:2 | 1.656 | 0.460 |
| 1:1.5 | 1.859 | 0.435 |
k. The value of b is related to the slope of the throwing sandbag (3).
Further, the step 1) specifically includes the following steps:
1.1) layered design: dividing the sandbag revetment structure into a plurality of layers according to the design elevation, wherein each layer is located in a different elevation interval, and the height of each layer is 5-10 times of the design height of the sandbag; the significance of the layered design is that the sandbags are thrown according to the flat layer throwing sequence, and after one layer of construction section is thrown, the upper layer is thrown for construction;
1.2) partition design: according to the engineering quantity, each layer takes a certain length and width as a unit engineering. Subdividing each layer of unit engineering cells into fixed-point throwing cells (namely, moving the positioning ship once and throwing a sand bag coverage range of a throwing barge);
1.3) numbering the throwing areas according to the flat layer throwing sequence: sequentially throwing sandbags from a far bank to a near bank, moving the sandbags to the near bank to a next throwing point after each throwing, and positioning and throwing again; and after the first layer is completely cast, carrying out underwater terrain monitoring, recording the defect position of local sand bag casting, starting casting the second layer from the far bank to the near bank, and carrying out additional casting at the defect position.
Further, the step 2) specifically includes the following steps:
2.1) monitoring technical indexes such as the flow direction, the flow speed and the like of space water flow through a flow rate meter, a tracer and the like; measuring the throwing depth by a depth finder, a multi-beam sonar and other equipment;
2.2) according to the measured flow direction, flow velocity v and throwing depth H of the space water flowdSubstituting the calculated offset distance into a sandbag throwing and dropping distance empirical formula to calculate the offset distance from the throwing area grid required by the positioning barge; determining an offset angle according to the flow direction of the water flow; the above offset distance is equal to the drop distance experience through sandbag throwingFormula (II)
Converting the obtained throwing drop distance S; the offset angle is an included angle between the water flow advancing direction and the bank slope normal;
2.3) selecting the position of a positioning barge through a GPS positioning device and anchoring the positioning barge according to the position of a casting area grid which is prepared for casting construction at present;
2.4) after the positioning barge is positioned, the throwing barge and the sand carrier are berthed at two sides of the positioning barge, the sand flushing device and the pumping device are hoisted to the sand carrier from the positioning barge, and the sand filling pipe is connected to the throwing barge through the positioning barge.
Further, the step 3) specifically includes the following steps:
3.1) selecting a test section in a construction area to carry out a sandbag field throwing model test, and binding a floating ball with a measuring rope on a sandbag for testing for positioning the sandbag; the drop distance S of the cast sandbag, the flow velocity v of water flow and the cast depth H measured on sitedThe sandbag floating specific gravity delta and the sandbag perimeter C are brought into a sandbag throwing and falling distance empirical formula to draw
Fitting the coefficients k and b of the empirical formula of the dropping distance of the sandbag, and taking the reference value provided in the representative value 1;
3.2) sand bag throwing and dropping distance empirical formula corrected according to coefficient
Adjusting the position of the positioning barge.
Further, the step 4) specifically includes the following steps:
4.1) dredging and taking sand in the designated sediment deposition area, and transporting the collected sand to a construction site by using a special sand transport ship;
4.2) the transportation route approaches to the positioning barge from the upstream or downstream side in the construction area according to the full load, and returns to the sand mining area from the other side in the no-load state;
4.3) the sand on the sand carrier is washed into a water-sand mixture by a high-pressure water pump in a water gun form;
4.4) pumping the water-sand mixture by using a slurry pump and continuously feeding the water-sand mixture into the sand bag.
Further, the step 5) specifically includes the following steps:
5.1) spreading sandbags in the throwing barge, and checking the intact condition of the sandbags;
5.2) connecting a sand filling pipe, tightening a sand filling cuff, and filling sand by using a slurry pump;
5.3) draining water by the sand bag and repeatedly filling sand until the filling degree meets the requirement;
5.4) filling sandbags layer by layer, stacking the sandbags layer by layer into a V shape, throwing the barge to open the bottom after all the sandbags are filled, and throwing the sandbags;
and 5.5) repeatedly filling and throwing the sandbags in situ, measuring the underwater topography of the construction area by adopting a multi-beam sonar, and comparing the underwater topography data with the underwater topography data before throwing, wherein the throwing of the sandbags in the area is finished after the sandbags reach the current design layer height.
Has the advantages that: compared with the prior art, the invention has the following effects:
(1) the construction efficiency is high; the sandbags are stacked in the V shape in the open bottom barge, so that the sandbags can be smoothly separated from the bottom opening of the barge even if being stacked to multiple layers; the barge can be bottomed once, and more than 30 sandbags are thrown, so that the bottom opening times of the barge are greatly reduced, the construction loss is reduced, and the construction time is shortened;
(2) the sand bag is thrown accurately: observing the posture change and the final drop point of a bag body in the sand bag sinking process through a model test, and calculating a corresponding sand bag drop distance formula through mechanism analysis; through field tests, the calculated formula is corrected according to test results under actual construction conditions, and a relatively accurate sandbag throwing and dropping distance empirical formula can be obtained;
(3) the pile section shaping rate that the sand bag of jettisoning formed is high, the homogeneity is good, has avoided the waste of sand bag, has guaranteed the stability of sand bag pile structure: the uniformity of the sand bag throwing is ensured by the combination of the following technical means: dividing actual throwing area grids according to the size of a piled body of the sandbags in the barge, carrying out barge throwing displacement according to the throwing area grids, and carrying out sandbag throwing according to the flat layer throwing sequence; the throwing quality is monitored through real-time underwater section measurement in the throwing and ship moving processes, the position where the throwing quality does not reach the standard due to construction, sudden change of water flow conditions and other accidental factors is found in time, and the supplementing throwing is carried out.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a layered arrangement;
FIG. 2 is a floor plan view of the construction method of the present invention;
FIG. 3 is a schematic view showing how sandbags 3 are stacked and thrown in a throwing barge;
reference numerals: 1-sandbag throwing area; 2-a throwing area grid; 3-sandbag; 4-a flow rate meter; 5-multibeam sonar; 6-positioning a barge; 7-offset distance; 8-offset angle; 9-anchor; 10-a throwing barge; 11-sand carrier; 12-a high pressure water pump; 13-a slurry pump; 14-Sand filled pipe.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
A construction method for high-efficiency and accurate deep water throwing of sand bags for river underwater bank protection mainly comprises the following steps:
1) firstly, carrying out layered design, partition design and cell throwing sequence design on a sandbag throwing area 1;
2) according to the partition arrangement and the sand bag 3 throwing and dropping distance empirical formula
Selecting the position of a positioning barge 6 and fixing the positioning barge by an anchor 9, and docking the sand carrier 11 and the throwing barge 10;
3) correcting the coefficients k and b of the casting and dropping distance empirical formula according to the drift of the casting sandbag 3 measured on site to obtain actually adopted coefficients k and b, and adjusting the position of the positioning barge 6;
4) hydraulically scouring sand to make slurry in a sand carrier 11, and pumping the slurry to a throwing barge 10 through a positioning barge 6 by using a slurry pump 13;
5) filling sandbags 3 in a throwing barge 10 layer by layer, stacking the sandbags layer by layer into a V shape, then opening the throwing barge 10, throwing the sandbags 3, and monitoring corresponding underwater sections;
6) and (3) shifting the positioning barge 6 and the throwing barge 10 to the next subarea according to the construction layered subarea design, and repeating the barge positioning, adjusting, sandbag filling and sandbag throwing processes in the steps 2) to 5) until the full-face sandbag 3 throwing construction is completed.
The sand bag 3 throwing and dropping distance empirical formula is obtained by comprehensively analyzing results of a sand bag 3 throwing water tank model test and a field throwing sand bag 3 drifting and dropping distance test, wherein S is a downstream drifting distance (m); hdSinking to the depth of water (m); v is the water flow velocity (m); delta is sandbag 3 float specific gravity (-); g is gravity acceleration (m/s)2) (ii) a C is sandbag 3 sandbag circumference (m); k. b (-) is an empirical formula coefficient, and the value is related to the gradient of the throwing sandbag 3; the values of the empirical coefficients for reference are shown in the following table, and specific values need to be adjusted by combining the drift and drop distance test analysis results of the on-site sand bag 3, which is shown in the reference table 1;
TABLE 1 empirical formula coefficient reference value Table
The technical scheme comprises the following steps:
1) carrying out layered design, partition design and cell throwing sequence design on the sandbag throwing area 1:
1.1) layered design: dividing the sand bag 3 bank protection structure into a plurality of layers according to the design elevation, wherein each layer is positioned in a different elevation interval, and the height of each layer is 5-10 times of the design height of the sand bag 3; the significance of the layered design is that the sandbags 3 are thrown according to the flat layer throwing sequence, and after one layer of construction section is thrown, the upper layer is thrown for construction;
1.2) partition design: according to the engineering quantity, each layer takes a certain length and width as a unit engineering. Subdividing each layer of unit engineering cells into fixed-point throwing cells 2 (namely, the positioning ship shifts once and the throwing barge 10 throws the coverage of the sandbags 3);
1.3) numbering the throwing area grids 2 according to the flat layer throwing sequence: sequentially throwing the sandbags 3 from the far bank to the near bank, moving the ship to the near bank to the next throwing point after each throwing, and positioning and throwing again; after the first layer is completely cast, carrying out underwater terrain monitoring, recording the cast defect position of the local sand bag 3, starting casting the second layer from a far bank to a near bank, and carrying out additional casting and additional casting at the defect position;
2) according to the numbered throwing area grid 2 position and the throwing and dropping distance empirical formula of the sandbags 3, selecting the position of a positioning barge 6 and anchoring 9, and docking the sand carrier 11 and the throwing barge 10 at two sides:
2.1) monitoring technical indexes such as the flow direction, the flow speed and the like of the space water flow through a flow meter 4, a tracer and the like; measuring the throwing depth by a depth finder, a multi-beam sonar 5 and other equipment;
2.2) according to the measured flow direction, flow velocity v and throwing depth H of the space water flowdSubstituting the calculated offset distance 7 into the sand bag 3 throwing and dropping distance empirical formula to calculate the required offset distance 7 from the throwing area grid 2 to the positioning barge 6; determining an offset angle 8 according to the flow direction of the water flow; the above-mentioned offset distance 7 is equal to the empirical formula of the drop distance through the sandbag 3
Converting the obtained throwing drop distance S; the offset angle 8 is an included angle between the water flow advancing direction and the bank slope normal;
2.3) selecting the position of a positioning barge 6 by a GPS positioning device and anchoring 9 the positioning barge 6 according to the position of a casting area grid 2 which is prepared to carry out casting construction at present;
2.4) after the positioning barge 6 is positioned, the throwing barge 10 and the sand carrier 11 are berthed at the two sides of the positioning barge 6, sand flushing equipment and pumping equipment are hoisted to the sand carrier 11 from the positioning barge 6, and a sand filling pipe 14 is connected to the throwing barge 10 through the positioning barge 6;
3) correcting the casting and dropping distance empirical formula coefficients k and b of the sandbags 3 according to the drift of the casting sandbags 3 measured on site, and adjusting the position of the positioning barge 6:
3.1) inSelecting a test section in a construction area to carry out a sandbag 3 field throwing model test, and binding a floating ball with a measuring rope on the sandbag 3 for testing for positioning the sandbag 3; the drop distance S of the casting sandbag 3, the flow velocity v and the casting depth H measured on sitedThe sandbag floating specific gravity delta and the sandbag perimeter C are brought into a sandbag 3 throwing and falling distance empirical formula to draw
Fitting the casting and dropping distance empirical formula coefficients k and b of the sandbag 3 by a curve, and taking the reference value provided in the representative value 1;
3.2) empirical formula of throwing and dropping distance of sandbag 3 corrected according to coefficient
Adjusting the position of the positioning barge 6;
4) hydraulic sand flushing and slurry making in the sand carrier 11, using a slurry pump 13, is pumped through the positioning barge 6 to the throwing barge 10:
4.1) dredging and taking sand in a designated sediment deposition area, and transporting the collected sand to a construction site by using a special sand transport ship 11;
4.2) the transportation route approaches to the positioning barge 6 from the upstream or downstream side in the construction area according to the full load, and returns to the sand mining area from the other side in the no-load state;
4.3) the sand on the sand carrier 11 is washed into a water-sand mixture by a high-pressure water pump 12 in a water gun form;
4.4) pumping the water-sand mixture by using a mud pump 13 and continuously feeding the water-sand mixture into a sand bag 3;
5) filling sandbags 3 in the throwing barge 10 layer by layer, stacking the sandbags layer by layer into a V shape, then opening the bottom of the throwing barge 10, throwing the sandbags 3, and monitoring corresponding underwater sections:
5.1) spreading the sandbags 3 in the throwing barge 10, and checking the intact conditions of the sandbags 3;
5.2) connecting a sand filling pipe 14, tightening a sand filling cuff, and filling sand by using a mud pump 13;
5.3) draining the sand bag 3 and repeatedly filling sand until the filling degree meets the requirement;
5.4) filling sandbags 3 layer by layer, stacking layer by layer into a V shape, and throwing the barge 10 to open the bottom and throwing the sandbags 3 after all the sandbags are filled;
5.5) repeatedly filling and throwing the sandbag 3 in situ, measuring the underwater topography of a construction area by adopting a multi-beam sonar 5, comparing the underwater topography data with the underwater topography data before throwing, and finishing throwing the sandbag in the area after the thrown sandbag reaches the current design layer height;
6) and (3) carrying out the displacement of the positioning barge 6 and the throwing barge 10 according to the construction layered and partitioned design, and repeating the barge positioning, sandbag filling and sandbag throwing processes of the steps 2) to 5) until the throwing construction of the full-face sandbag 3 is completed.
Examples
The efficient and accurate deep water throwing construction method for the underwater river bank protection sandbag comprises the key steps of:
(1) as shown in fig. 1, the throwing area is designed in a layered and partitioned manner: the throwing area 1 is divided into seven layers according to the design elevation, namely a first layer (-36 m-river bed bottom), a second layer (-36 m-31 m), a third layer (-31 m-26 m), a fourth layer (-26 m-21 m), a fifth layer (-21 m-16 m), a sixth layer (-16 m-11 m) and a seventh layer (-11 m-6 m). Each layer is taken as a unit according to the length of 90 meters, each unit is divided into 30 multiplied by 30m cells for total amount control, and each cell is divided into 30 multiplied by 7.5m tossing cells 2 for fixed-point quantitative tossing.
(2) As shown in fig. 2, the water flow direction and the flow velocity v are measured by the flow velocity meter 4; measuring the casting depth H through sonar 5d(ii) a Measuring the floating specific gravity delta of the sandbag; according to the measured water velocity v and the throwing depth HdCalculating the sandbag throwing falling distance S by substituting the sandbag floating specific gravity delta and the selected sandbag perimeter C into a sandbag 3 throwing falling distance empirical formula, namely, the offset distance 5 between the positioning barge 6 and the throwing area grid 2; determining an offset angle 8 according to the flow direction of the water flow; designing the position of a selected quantitative casting cell 2 to be constructed currently according to the partition design and the cell casting sequence, selecting the position of a positioning barge 6 through a GPS positioning device, and anchoring the positioning barge 6 by six 2-ton anchors 9; after the positioning barge 6 is positioned, the throwing barge 10 and the sand carrier 11 are berthed at the two sides of the positioning barge 6, and the high-pressure water pump 12 and the mud pump 13 are lifted from the positioning barge 6 to the sand carrier11, the sand-filled pipe 14 is connected to the casting barge 10 via the positioning barge 6.
(3) The design size of the sandbag 3 is 10m, the perimeter of the cross section is 3.8m, the corresponding sandbag 3 is manufactured, a test section is selected in a construction area to carry out a field throwing model test on the sandbag 3, and a floating ball with a measuring rope is bound on the sandbag 3 for the test and is used for positioning the sandbag 3; the drop distance S of the casting sandbag 3, the flow velocity v and the casting depth H measured on sitedThe sandbag floating specific gravity delta and the sandbag perimeter C are brought into a sandbag 3 throwing and falling distance empirical formula to draw
Fitting the casting and dropping distance empirical formula coefficients k and b of the sandbag 3 by a curve, and taking the reference value provided in the representative value 1; the sand bag 3 throwing and dropping distance empirical formula after coefficient correction
Adjusting the position of the positioning barge 6;
(4) dredging and taking sand in a designated sediment deposition area, and loading the collected sand to a construction site by using a sand transport ship 11; the transportation route is close to the positioning barge 6 from the upstream in the construction area when fully loaded, and returns to the sand mining area from the downstream side when unloaded; the sand on the sand carrier 11 is flushed into a water-sand mixture by a high-pressure water pump 12 through high-pressure jet flow in a water gun form; the water-sand mixture is pumped by a mud pump 13 and is continuously fed into the sand bag 3.
(5) Spreading the sandbags 3 in the throwing barge 10, and checking the intact condition of the sandbags 3; when each sandbag 3 is manufactured, 1 sand filling cuff and 2 water discharging cuffs are arranged; connecting a sand filling pipe 14, fastening a sand filling cuff, and starting a mud pump 13 and a high-pressure water pump 12 to fill sand; the sand filling adopts a secondary filling method, and the discharge of accumulated water in the sand bag 3 is accelerated by adopting a weight method at intervals; as shown in fig. 3, the sandbags 3 are filled layer by layer and stacked layer by layer into a V shape, and after all the sandbags 3 are filled, the throwing barge 10 is bottomed and the sandbags 3 are thrown; and after 10 groups of sand bags 3 are repeatedly filled and thrown in situ, measuring the underwater topography of the construction area by using the multi-beam sonar 5, comparing the underwater topography with the underwater topography data before throwing, and performing additional throwing if the underwater topography data does not reach the designed layer thickness.
(6) And (3) carrying out positioning barge 6 and throwing barge 10 displacement according to construction layered partition design, and repeating the barge positioning, sandbag filling and sandbag 3 throwing processes of the steps 2) to 5) until the throwing construction of the full-face sandbag 3 is completed.
Claims (8)
1. A construction method for high-efficiency and accurate deep water throwing of sand bags for underwater river bank protection is characterized by comprising the following steps:
1) carrying out layered design, partition design and cell throwing sequence design on the sandbag throwing area (1);
2) according to the partition arrangement and an empirical formula of the throwing and dropping distances of the sandbags (3), selecting the position of a positioning barge (6), fixing the positioning barge by an anchor (9), and berthing two sides of a sand carrier (11) and a throwing barge (10);
3) correcting the coefficient of a casting and dropping distance empirical formula according to the drift of the casting sandbag (3) measured on site to obtain an actually adopted coefficient, and adjusting the position of the positioning barge (6);
4) hydraulic sand flushing and slurry making are carried out in a sand carrier (11), and a slurry pump (13) is used for pumping to a throwing barge (10) through a positioning barge (6);
5) filling sandbags (3) in a throwing barge (10) layer by layer, stacking the sandbags layer by layer into a V shape, then opening the bottom of the throwing barge (10), throwing the sandbags (3), and monitoring corresponding underwater sections;
6) and (3) shifting the positioning barge (6) and the throwing barge (10) to the next subarea according to the construction layered subarea design, and repeating the barge positioning, adjusting, sandbag filling and sandbag throwing processes in the steps 2) to 5) until the full-section sandbag (3) throwing construction is completed.
2. The efficient and accurate deep water throwing construction method of the underwater river bank protection sandbag according to claim 1, wherein in the step 2), the throwing drop distance empirical formula is as follows:
sandbag (3) throwing water tank model test and fieldComprehensively analyzing the drift falling distance test result of the throwing sandbag (3), wherein S is the drift distance (m) of the downstream; hdSinking to the depth of water (m); v is the water flow velocity (m); delta is the floating specific gravity (-) of the sand bag (3); g is gravity acceleration (m/s)2) (ii) a C is the perimeter (m) of the sand bag (3); k. b (-) is the coefficient of empirical formula.
3. The efficient and accurate deep water throwing construction method of the underwater river bank protection sandbag according to claim 2, wherein in the step 2), values of k and b are as follows:
k. The value of b is related to the slope of the throwing sandbag (3).
4. The efficient and accurate deep water throwing construction method for the underwater river bank protection sandbag according to claim 1, wherein the step 1) specifically comprises the following steps:
1.1) layered design: dividing the sand bag (3) revetment structure into a plurality of layers according to the design elevation, wherein each layer is positioned in a different elevation interval, and the height of each layer is 5-10 times of the design height of the sand bag (3); the layering design has the significance that the sandbags (3) are thrown according to the flat layer throwing sequence, and after one layer of construction section is thrown, the upper layer is thrown for construction;
1.2) partition design: according to the engineering quantity, each layer takes a certain length and width as a unit engineering. Each layer of unit engineering cells are further subdivided into fixed-point throwing cells (2), the throwing cells (2), namely the positioning ships, are shifted once, and a throwing barge (10) throws the coverage of the sandbags (3);
1.3) numbering the throwing area grids (2) according to the flat layer throwing sequence: sequentially throwing the sandbags (3) from the far bank to the near bank, moving the sandbags to the near bank to the next throwing point after each throwing, and positioning and throwing again; and after the first layer is completely cast, carrying out underwater terrain monitoring, recording the cast defect position of the local sand bag (3), starting casting the second layer from a far bank to a near bank, and performing additional casting at the defect position.
5. The efficient and accurate deep water throwing construction method for the underwater river bank protection sandbag according to claim 1, wherein the step 2) specifically comprises the following steps:
2.1) monitoring technical indexes such as the flow direction, the flow speed and the like of the space water flow through a flow meter (4), a tracer and the like; measuring the throwing depth by equipment such as a depth finder and a multi-beam sonar (5);
2.2) according to the measured flow direction, flow velocity v and throwing depth H of the space water flowdSubstituting the calculated offset distance (7) into the sand bag (3) throwing and dropping distance empirical formula to calculate the required offset distance (7) from the throwing area grid (2) of the positioning barge (6); determining an offset angle (8) according to the flow direction of the water flow; the offset distance (7) is equal to the drop distance of the sand bag (3)
Converting the obtained throwing drop distance S; the offset angle (8) is an included angle between the water flow advancing direction and the bank slope normal;
2.3) selecting the position of a positioning barge (6) through a GPS positioning device and anchoring (9) the positioning barge (6) according to the position of a casting area grid (2) which is prepared to carry out casting construction at present;
and 2.4) after the positioning barge (6) is positioned, the throwing barge (10) and the sand carrier (11) are berthed at two sides of the positioning barge (6), the sand flushing equipment and the pumping equipment are hoisted to the sand carrier (11) from the positioning barge (6), and the sand filling pipe (14) is connected to the throwing barge (10) through the positioning barge (6).
6. The efficient and accurate deep water throwing construction method for the underwater river bank protection sandbag according to claim 1, wherein the step 3) specifically comprises the following steps:
3.1) selecting a test section in a construction area to carry out a sandbag (3) on-site throwing model test, and binding a floating ball with a measuring rope on the sandbag (3) for testing for positioning the sandbag (3); the drop distance S of the casting sandbag (3), the flow velocity v and the casting depth H measured on sitedThe sandbag floating specific gravity delta and the sandbag perimeter C are brought into a sandbag (3) throwing and dropping distance empirical formula to draw
Fitting the casting drop distance empirical formula coefficients k and b of the sandbag (3) by a curve, and taking the reference value provided in the representation 1;
3.2) casting and dropping distance empirical formula of sandbag (3) corrected according to coefficient
Adjusting the position of the positioning barge (6).
7. The efficient and accurate deep water throwing construction method for the underwater river bank protection sandbag according to claim 1, wherein the step 4) specifically comprises the following steps:
4.1) dredging and taking sand in the designated sediment deposition area, and transporting the collected sand to a construction site by using a special sand transport ship (11);
4.2) the transportation route approaches to the positioning barge (6) from the upstream or downstream side in the construction area according to the full load, and returns to the sand mining area from the other side in the no-load state;
4.3) the sand on the sand carrier (11) is washed into a water-sand mixture by a high-pressure water pump (12) in a water gun form;
4.4) pumping the water-sand mixture by using a mud pump (13) and sending the water-sand mixture into a sand bag (3).
8. The efficient and accurate deep water throwing construction method for the underwater river bank protection sandbag according to claim 1, wherein the step 5) specifically comprises the following steps:
5.1) spreading the sandbags (3) in the throwing barge (10), and checking the sound condition of the sandbags (3);
5.2) connecting a sand filling pipe (14), tightening a sand filling cuff, and filling sand by using a mud pump (13);
5.3) draining water and repeatedly filling sand by the sand bag (3) until the filling degree meets the requirement;
5.4) filling sandbags (3) layer by layer, stacking layer by layer into a V shape, and after all the sandbags are filled, opening the bottom of a throwing barge (10) and throwing the sandbags (3);
5.5) repeatedly filling and throwing the sandbag (3) in situ, measuring the underwater topography of the construction area by adopting the multi-beam sonar (5), and comparing the underwater topography data with the underwater topography data before throwing, wherein the throwing of the sandbag in the area is finished after the sandbag which has been thrown reaches the height of the current design layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110647466.0A CN113356137B (en) | 2021-06-10 | 2021-06-10 | Efficient and accurate deep-water throwing construction method for sand bags for river underwater bank protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110647466.0A CN113356137B (en) | 2021-06-10 | 2021-06-10 | Efficient and accurate deep-water throwing construction method for sand bags for river underwater bank protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113356137A true CN113356137A (en) | 2021-09-07 |
| CN113356137B CN113356137B (en) | 2022-08-02 |
Family
ID=77533797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110647466.0A Active CN113356137B (en) | 2021-06-10 | 2021-06-10 | Efficient and accurate deep-water throwing construction method for sand bags for river underwater bank protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113356137B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482174A (en) * | 2022-01-29 | 2022-05-13 | 中交水利水电建设有限公司 | Underwater accurate throwing and filling construction method for dredging engineering |
| CN118326899A (en) * | 2024-04-11 | 2024-07-12 | 长江重庆航道工程局 | Underwater bank slope supplementing method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852148A (en) * | 2012-06-29 | 2013-01-02 | 浙江工业大学 | Shallow sea region land and sea mixed rock riprap method for dynamic planning |
| CN103669286A (en) * | 2013-12-03 | 2014-03-26 | 河海大学 | Large geotextile sandbag used for near-shore deep-groove bank slope protection and throwing device thereof |
| CN106320344A (en) * | 2016-09-22 | 2017-01-11 | 中交航局第二工程有限公司 | Construction control method for dimension stone deepwater precise throwing and filling |
| CN112030978A (en) * | 2020-09-08 | 2020-12-04 | 浙江世润建创科技发展有限公司 | Underwater accurate stone throwing system for complex terrain and stone throwing construction method |
| CN112900443A (en) * | 2021-01-21 | 2021-06-04 | 南京市水利规划设计院股份有限公司 | Underwater construction method for deep groove bagged sand throw pillow protection engineering |
-
2021
- 2021-06-10 CN CN202110647466.0A patent/CN113356137B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852148A (en) * | 2012-06-29 | 2013-01-02 | 浙江工业大学 | Shallow sea region land and sea mixed rock riprap method for dynamic planning |
| CN103669286A (en) * | 2013-12-03 | 2014-03-26 | 河海大学 | Large geotextile sandbag used for near-shore deep-groove bank slope protection and throwing device thereof |
| CN106320344A (en) * | 2016-09-22 | 2017-01-11 | 中交航局第二工程有限公司 | Construction control method for dimension stone deepwater precise throwing and filling |
| CN112030978A (en) * | 2020-09-08 | 2020-12-04 | 浙江世润建创科技发展有限公司 | Underwater accurate stone throwing system for complex terrain and stone throwing construction method |
| CN112900443A (en) * | 2021-01-21 | 2021-06-04 | 南京市水利规划设计院股份有限公司 | Underwater construction method for deep groove bagged sand throw pillow protection engineering |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482174A (en) * | 2022-01-29 | 2022-05-13 | 中交水利水电建设有限公司 | Underwater accurate throwing and filling construction method for dredging engineering |
| CN118326899A (en) * | 2024-04-11 | 2024-07-12 | 长江重庆航道工程局 | Underwater bank slope supplementing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113356137B (en) | 2022-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113356137B (en) | Efficient and accurate deep-water throwing construction method for sand bags for river underwater bank protection | |
| CN102268871B (en) | Construction method of turnover platform for underwater pile foundation of bridge | |
| CN109024525B (en) | Artificial island structure considering underground space development and utilization and construction method thereof | |
| CN107075824A (en) | Sea bed terminal for offshore activity | |
| CN109322283A (en) | A kind of Sai Kegebin construction technology | |
| JP6640891B2 (en) | Grouting method for joints of submerged boxes | |
| CN104878779B (en) | The anti-silting cover plate of immersed tube tunnel rubble bedding cover type, anti-silting system and construction method | |
| CN110607797A (en) | Underwater construction method for water taking head | |
| CN113668610A (en) | Semi-floating pouring method for steel shell concrete immersed tube | |
| CN210288280U (en) | Open type cofferdam-free coral sand island reef reclamation system | |
| CN109680647A (en) | A kind of Construction at ports technique convenient for later maintenance | |
| US20220324540A1 (en) | A marine construction and a method for constructing the same | |
| CN100582382C (en) | Process for constructing quickly consolidated temperory horizontal platform by picking clay of lake bottom | |
| CN112900443A (en) | Underwater construction method for deep groove bagged sand throw pillow protection engineering | |
| CN106192910A (en) | A kind of earth and rockfill dam layer of sand earthquake liquefaction ballast ruggedized construction and method under water | |
| CN216973272U (en) | Staggered caisson wharf with cover plate | |
| CN206090478U (en) | Embankment dam sand bed earthquake under water liquefaction ballast reinforced structure | |
| Chen et al. | Design and testing of scour protection for Adriatic LNG GBS | |
| CN102191775A (en) | Pile stabilizing method in combination of artificial foundation bed of exposed bedrock and cantilever | |
| CN118653542A (en) | Construction method of water taking head | |
| Song et al. | CAISSON DESIGN AND VERIFICATION OF FRICTION COEFFICIENT OF CAISSON FOUNDATION FOR TUAS PORT PHASE 1 | |
| CN110258725A (en) | Water works water tank fabrication and installation method | |
| Kyle | COLOMBO HARBOUR WORKS, CEYLON.(INCLUDES PLATE AND APPENDICES). | |
| Roberts | Innovation in concrete gravity substructures: The Ravenspurn North platform and beyond | |
| Blume et al. | Rincon offshore island and open causeway |
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 |