Construction method for accurately controlling riprap and silt extrusion on water and silt disposal device

Abstract

The invention discloses a construction method for accurately controlling water riprap and silt extrusion and a silt disposal device, and relates to a construction method for accurately controlling water riprap and silt extrusion. The method comprises the steps of transportation and positioning, process parameter determination, trial throwing and parameter adjustment, continuous throwing and filling operation, mud surface change monitoring, sludge upheaval treatment, stone lifting height dynamic adjustment, continuous stone throwing and silt squeezing and the like. The sludge disposal device used in the construction method comprises a water pipe, a supporting structure, a driving motor, a rotatable blade and a high-pressure nozzle. The device can be unfolded to extend to a sludge bag, the sludge bag is scattered through a stirring and water flushing method, and the raised sludge bag can be precisely treated. According to the construction method and the sludge disposal device, the depth of riprap and silt extrusion on water can be accurately controlled before and during construction, the engineering quality is guaranteed, the risk is reduced, and the cost is controlled.

Description

Technical Field

[0001] The invention relates to the technical field of soft soil foundation treatment, and in particular to a construction method for accurately controlling riprap and silt squeezing on water and a silt disposal device. Background Art

[0002] Rock dumping is a common soft soil foundation treatment method for building roads or seawalls in water or tidal flat environments. The principle is to throw larger stones into the soft clay so that the stones occupy the original soft clay position, thereby achieving the purpose of improving the bearing capacity of the foundation. Rock dumping has the advantages of no need for excavation and convenient construction. At present, there is no depth sounder that can measure the depth of rock dumping on the water. The most common and reliable method to determine the depth of rock dumping is drilling sampling, but the cost of drilling sampling on the water is very high, the cycle is very long, and the difficulty is very great. As a result, the depth of rock dumping during construction is often full of uncertainty.

[0003] Chinese patent CN115233646A (publication date: October 25, 2022) discloses a mud-balanced riprap and silt-squeezing construction method, including construction preparation, high-pressure water jetting slurry making, riprap replacement, filling gap gravel, vibration compaction and observation and acceptance and other process steps. The invention uses high-pressure jet mud mixing equipment to spray slurry before riprap and silt-squeezing soft soils such as soft plastic or hard plastic silt soil, silt, peat soil, etc., to transform soft soils such as soft plastic or hard plastic silt soil, silt, peat soil, etc. into fluidized mud, which has a light specific gravity and small friction resistance to block stones. Block stones and gravel can easily reach the bottom hard soil layer, which can improve the construction quality. While riprap, the same amount of mud is removed synchronously to keep the surrounding soil pressure relatively stable during the entire riprap replacement process to prevent the surrounding strata from settling and cracking. At the same time, the mud is more fluid than soft soils such as silt, and can be quickly transferred into the sedimentation tank through the drainage ditch, and the construction efficiency is faster.

[0004] Chinese patent CN115928520A (publication date: April 7, 2023) discloses a combined construction method of stone throwing and silt squeezing and strong compaction for roadbed in soft soil layers. The method includes S1. Draining and silting the original site where the required effective compaction surface is located, and then excavating a decompression ditch at the edge of the required effective compaction surface; S2. Throwing and filling stone slabs into the original site after dredging, and layered rolling to preliminarily level the required effective compaction surface; S3. Backfilling with plain soil after rolling, and performing double-layer strong compaction after leveling again; S4. After the double-layer strong compaction is completed, backfill with plain soil, and use a roller to roll and level it until the surface reaches the designed elevation. This method can accelerate the settlement of stone slabs and the formation of roadbed by throwing stones to squeeze out silt and performing double-layer strong compaction, effectively solving the bearing capacity problem of foundation in soft soil layers. It is particularly suitable for projects with deep silty geology and is suitable for promotion.

[0005] Chinese patent CN118309067A (publication date: July 9, 2024) discloses a construction device for gravel piles in a lying inclined stratum, which belongs to the technical field of soft soil foundation treatment equipment, including a tower, a hoisting winch, a pile pipe and a vibrator, the hoisting winch is arranged at the bottom of the tower, the pile pipe is connected to the wire rope of the hoisting winch, the vibrator is installed at the bottom of the pile pipe, and the pile pipe is provided with an inverted cone-shaped feed hopper, a support frame is provided on one side of the tower in the vertical direction, and a feeding mechanism is slidably arranged on the support frame, and the feeding mechanism includes a feeding bin and a support seat arranged on both sides of the feeding bin in the horizontal direction, and the two inner sides of the support frame are provided with vertical grooves, and the two support seats are respectively slidably connected in the two vertical grooves, and a driving mechanism for driving the support seat to slide in the vertical direction is arranged in the vertical groove on one side. The invention can conveniently add the gravel in the feeding bin to the feed hopper without the need for the staff to repeatedly perform manual operations, thereby improving work efficiency and reducing the labor intensity.

[0006] At present, there are some defects in the construction method of stone riprap on water to squeeze out silt, which are mainly manifested in the following aspects: first, there is a lack of construction methods to accurately control the depth of stone riprap on water to squeeze out silt; second, there is a lack of calculation methods for the depth of stone riprap to squeeze out silt that takes into account the impact of falling stones; third, there is a lack of methods to deal with local silt bag bulges and large height differences on the silt surface; this leads to blindness and uncertainty in the construction process, prolongs the construction period of stone riprap to squeeze out silt, increases costs, and also increases the risks of insufficient silt squeezing depth and unreasonable construction plans. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a construction method and a silt disposal device for accurately controlling the squeezing of silt by riprap on water.

[0008] A construction method for accurately controlling riprap and silt extrusion on water comprises the following steps:

[0009] Step S1, transportation and positioning, using a transport ship to transport the blocks to the construction area, accurately positioning the construction area, and then starting the detection device;

[0010] Step S2, determining the process parameters, and determining the first stone riprap silt squeezing depth H according to the design target value;

[0011] Step S3, trial throwing and parameter adjustment, conduct trial throwing test, measure the depth of stone blocks squeezing silt into mud in real time, evaluate the effect of entering mud according to monitoring data; dynamically adjust throwing parameters, correct and optimize the nth stone throwing silt squeezing depth H n ;

[0012] Step S4: continuous dumping and filling operation, moving the excavator, and continuing the dumping and filling operation of the block stones according to the predetermined dumping and filling position and the lifting height h1;

[0013] Step S5: monitoring the change of the mud surface. During the dumping process, the dynamic changes of the mud surface in the area are continuously monitored;

[0014] Step S6, treating the sludge heave, starting the sludge disposal device to break up the sludge bags;

[0015] Step S7, dynamically adjusting the stone lifting height according to the tide level;

[0016] Step S8, continue to rip rocks and squeeze out silt, continue to rip rocks and squeeze out silt;

[0017] Step S9, completing the riprap and silt removal engineering quantity required by the structural design, and ending the riprap and silt removal task on water.

[0018] Further, the depth sounder in step S1 is located on the bottom surface of the transport ship;

[0019] Furthermore, the calculation formula for the silt squeezing depth of the first stone riprap in step S2 is as follows:

[0020]

[0021] Among them, H is the depth of the first stone into the mud, that is, the depth of the first stone riprap to squeeze the silt, γ r is the density of the rock, g is the acceleration due to gravity, v is the volume of the rock, γ s is the density of silt, k0 is the static earth pressure coefficient of silt, k p is the passive earth pressure coefficient of silt, b is the side length of the block, c is the cohesion of silt, is the internal friction angle of the silt, A1 is the area of ​​the stone perpendicular to the moving path, ρ w is the density of water, H1 and H2 are the height of the first stone and the water depth when the first stone is thrown, respectively, and f w is the water resistance coefficient.

[0022] Furthermore, the trial throwing test in step S3 includes the following steps:

[0023] Step S301: According to the calculation result in step S2, the excavator lifts the rock and dumps it to the designated location;

[0024] Step S302, using a depth measuring device to scan and measure the depth of the rock blocks squeezing into the mud;

[0025] Step S303: If the depth of the first stone riprap in step S2 is not reached, select a stone with a larger weight and repeat steps S2, S301 and S302 until the depth of the stone riprap in S302 reaches the depth of the first stone riprap in step S2.

[0026] Furthermore, in step S3, the filling parameters are dynamically adjusted by the calculation formula of the riprap depth of the nth stone, and the riprap depth H of the nth stone is corrected and optimized. n , the formula is as follows:

[0027] H n =h′ n +b n-1 ,

[0028]

[0029] Where n is the nth stone throwing, n is an integer greater than or equal to 2, H n is the depth of the nth rock riprap, v n is the volume of the nth stone, A n is the end area of ​​the nth stone, b n is the side length of the nth stone, b n-1 is the side length of the n-1th stone, h1 is the lifting height of the nth stone, h2 is the water depth when the nth stone is thrown, h n h′ is the depth to which the nth stone sinks further under the impact of the n-1th stone, n is the depth of the nth stone into the mud.

[0030] Furthermore, in step S6, when it is monitored that the height of the mud surface rises more than 50 cm, the sludge disposal device is started to break up the sludge bags by stirring and flushing to ensure that the height of the rise is controlled below 20 cm;

[0031] Furthermore, in step S8, every time the tide level drops by 1 m, the stone lifting height h1 is recalculated to adapt to environmental changes.

[0032] A sludge disposal device used in the construction method, comprising a water pipe, a support structure, a drive motor, a rotatable blade and a high-pressure nozzle;

[0033] The support structure includes a plurality of brackets and a plurality of folding joints, and adjacent brackets are connected by folding joints;

[0034] The support adopts a truss structure;

[0035] One end of the support structure is mounted on the deck of the transport ship, and the other end is mounted with a drive motor;

[0036] A rotatable blade is installed at the front end of the driving motor;

[0037] A high-pressure nozzle is installed at the front end of the rotatable blade;

[0038] The water pipe is installed inside the supporting structure, one end of which is connected to the water pump on the transport ship, and the other end of which is connected to the high-pressure nozzle.

[0039] Compared with the prior art, the advantages and effects of the present invention are as follows:

[0040] 1. The present invention provides a construction method for accurately controlling the squeezing of silt by riprap on water. By using the calculation formula for the squeezing depth of the first stone based on the principle of conservation of energy in a trial riprap experiment, the initial squeezing depth of the stone can be accurately controlled.

[0041] 2. The present invention provides a construction method for accurately controlling the squeezing of silt by riprap on water. By using the calculation formula for squeezing silt by riprap of the nth stone in adjusting the filling parameters, the process parameters of subsequent squeezing of silt by riprap can be corrected and adjusted, thereby ensuring the precise control of the squeezing depth during the construction process and ensuring the construction quality of squeezing of silt by riprap on water.

[0042] 3. The present invention provides a construction method for accurately controlling the squeezing of silt by riprap on water. By using an underwater depth sounder, the depth of squeezing of silt by riprap on water and the height of mud surface bulge can be monitored, thereby ensuring that the depth of squeezing of silt by riprap is accurately controlled during the squeezing construction process.

[0043] 4. The present invention provides a silt disposal device used in the construction method, which can accurately handle raised silt bags and improve the accuracy of stone throwing and silt squeezing on the water.

[0044] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0045] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0047] in:

[0048] Figure 1 It is a schematic diagram of a sludge disposal device;

[0049] Figure 2A construction diagram for accurately controlling the depth of riprap and silt removal on water;

[0050] Figure 3 A flow chart of the construction method for accurately controlling the depth of riprap and silt extrusion on water;

[0051] Figure 4 It is a curve diagram showing the relationship between the weight of the block and the depth of the silt squeezed;

[0052] Figure 5 It is a curve diagram showing the relationship between water depth and silt squeezing depth;

[0053] Figure 6 It is a curve diagram showing the relationship between lifting height and silt squeezing depth.

[0054] Explanation of the reference numerals: 1-silt disposal device; 2-deck of transport ship; 3-water pump; 4-detection device; 5-excavator; 6-stone; 7-raised silt bag; 8-water surface; 9-mud surface; 10-silt; 101-water pipe; 102-bracket; 103-folding joint; 104-driving motor; 105-rotatable blades; 106-high-pressure nozzle. DETAILED DESCRIPTION

[0055] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0056] It should be understood that the references to "one embodiment" or "this embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "one embodiment" or "this embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0057] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0058] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0059] The term "at least one" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0060] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0061] Example 1

[0062] This embodiment is a sludge disposal device.

[0063] Please refer to Figure 1 , a sludge disposal device (1), comprising a water pipe (101), a support structure, a drive motor (104), a rotatable blade (105) and a high-pressure nozzle (106);

[0064] The support structure comprises a plurality of brackets (102) and a plurality of folding joints (103), and adjacent brackets (102) are connected via the folding joints (103);

[0065] The support (102) adopts a truss structure;

[0066] One end of the support structure is fixed on the deck (2) of the transport ship, and the other end is connected to the drive motor (104);

[0067] A rotatable blade (105) is installed at the front end of the driving motor (104);

[0068] The rotatable blade (105) is provided with a plurality of high-pressure nozzles (106);

[0069] The water pipe (101) is located inside the supporting structure, one end of which extends out of the bracket (102) to be connected to the water pump (3), and the other end of which is connected to the high-pressure nozzle (106).

[0070] Technical effect of this embodiment: This embodiment provides a sludge disposal device, which is unfolded and extended to the sludge bag, and the sludge bag is broken up by stirring and water flushing. It can accurately handle the raised sludge bag and improve the accuracy of stone throwing and silt squeezing on the water.

[0071] Example 2

[0072] Based on Example 1, this example provides a construction method for accurately controlling the squeezing of silt by riprap on water.

[0073] Please refer to Figure 2-3 A construction method for accurately controlling the squeezing of silt by riprap on water comprises the following steps:

[0074] Step S1, transportation and positioning, using a transport ship to transport the stone blocks to the construction area, accurately positioning them, and starting the detection device 4;

[0075] Step S2, determining the process parameters, and determining the first stone riprap silt squeezing depth according to the design target value;

[0076] Step S3, trial throwing and parameter adjustment, conduct trial throwing test, measure the depth of stone blocks entering mud in real time, evaluate the effect of entering mud according to monitoring data; dynamically adjust throwing parameters, correct and optimize the depth of stone blocks entering mud;

[0077] Step S4: continuous dumping operation, moving the excavator (5) and continuing the dumping operation of the block stones (6) according to the predetermined dumping position and height;

[0078] Step S5: monitoring the change of the mud surface. During the dumping process, the dynamic changes of the mud surface in the area are continuously monitored;

[0079] Step S6, treating the sludge heave, starting the sludge treatment device (1) to break up the heaved sludge bag (7);

[0080] Step S7, dynamically adjusting the lifting height of the stone (6);

[0081] Step S8, continue to rip rocks and squeeze out silt, continue to rip rocks and squeeze out silt;

[0082] Step S9, completing the riprap and silt removal engineering quantity required by the structural design, and ending the riprap and silt removal task on water.

[0083] Furthermore, the detection device in step S1 is located on the bottom surface of the transport ship; the detection device includes a depth sounder.

[0084] Furthermore, in step S6, when it is monitored that the height of the mud surface rises more than 50 cm, the sludge disposal device is started to break up the sludge bags by stirring and flushing to ensure that the height of the rise is controlled below 20 cm;

[0085] Furthermore, in step S8, every time the tide level drops by 1 m, the lifting height of the stone is recalculated to adapt to environmental changes.

[0086] Technical effect of this embodiment: a construction method for accurately controlling the depth of silt squeezing is proposed. By applying detection devices, silt disposal devices, etc., the depth of silt squeezing by stone throwing on the water and the height of mud surface uplift can be monitored and controlled; the stone lifting height can be dynamically adjusted according to the situation, and the construction quality of stone throwing on the water to squeeze silt can be controlled before and during construction, thereby ensuring accurate control of the silt squeezing depth.

[0087] Example 3

[0088] Based on Example 2, this example provides a calculation method for determining the depth of the first stone riprap to squeeze out the silt.

[0089] The calculation method includes the energy conservation equation of the first stone, which is as follows:

[0090]

[0091] Among them, H is the depth of the first stone into the mud, that is, the depth of the first stone riprap to squeeze the silt, γ r is the density of the rock, g is the acceleration due to gravity, v is the volume of the rock, γ s is the density of silt, k0 is the static earth pressure coefficient of silt, k p is the passive earth pressure coefficient of silt, b is the side length of the block, c is the cohesion of silt, is the internal friction angle of the silt, A1 is the area of ​​the stone perpendicular to the moving path, ρ w is the density of water, H1 and H2 are the height of the first stone and the water depth when the first stone is thrown, respectively, and f w is the water resistance coefficient.

[0092] Please refer to Figure 4-6 As shown, according to the calculation results of the above formula, every increase of 100kg in the weight of the stone will increase the silt-extrusion depth by about 60cm, and every increase of 1m in the lifting height or water depth will increase the silt-extrusion depth by about 30cm.

[0093] Technical effect of this embodiment: by combining the calculation formula of the first stone riprap silt squeezing depth based on the principle of conservation of energy, a construction method that can accurately control the silt squeezing depth is proposed, and the quality of water riprap silt squeezing construction is controlled before and during construction.

[0094] Example 4

[0095] Based on Example 2, this example provides a method for a trial casting test.

[0096] The trial throwing test in step S3 comprises the following steps:

[0097] Step S301: According to the calculation result in step S2, the excavator lifts the rock and dumps it to the designated location;

[0098] Step S302, using the depth measuring device (4) to scan and measure the depth of the stone (6) squeezing the silt into the mud;

[0099] Step S303: If the depth of the first stone riprap in step S2 is not reached, select a stone (6) with a larger weight, and repeat steps S2, S301 and S302 until the depth of the stone riprap in S302 reaches the depth of the first stone riprap in step S2.

[0100] Technical effect of this embodiment: The present invention proposes a trial throwing test method, through which the lifting height, stone weight, etc. determined in S2 are verified to match the water depth and soil properties, thereby reducing the error of stone throwing and silt squeezing on the water and ensuring that the construction process is accurate and controllable.

[0101] Example 5

[0102] Based on Example 2, this example provides a method for dynamically adjusting dumping parameters.

[0103] A method for dynamically adjusting dumping and filling parameters includes calculating and adjusting the dumping and filling parameters using a calculation formula for the silt squeezing depth of an n-th stone dumping and filling.

[0104] The formula for calculating the silt-squeezing depth of the nth stone riprap is as follows:

[0105] H n =h′ n +b n-1 ,

[0106]

[0107] Where n is the nth stone throwing, n is an integer greater than or equal to 2, H n is the depth of the nth rock riprap, v n is the volume of the nth stone, A n is the end area of ​​the nth stone, b n is the side length of the nth stone, b n-1 is the side length of the n-1th stone, h1 is the height of the nth stone, h2 is the water depth when the nth stone is thrown, and h n h′ is the depth to which the nth stone sinks further under the impact of the n-1th stone, n is the depth of the nth stone into the mud.

[0108] Technical effect of this embodiment: The present invention proposes a correction calculation method, which dynamically adjusts the filling parameters by combining the calculation formula for the depth of the n-th stone riprap to squeeze the silt, corrects and adjusts the subsequent process parameters, thereby ensuring the quality of the water riprap and silt squeezing construction.

[0109] In summary, the present invention provides a construction method and a silt disposal device for accurately controlling the riprap on water to squeeze out silt, which can monitor the depth of the mud surface in real time, dispose of the raised silt bags in time, and adjust the weight and lifting height of the subsequent stones in real time according to the silt squeezing depth of the previous stone, etc., so as to accurately control the depth of the riprap on water to squeeze out silt, ensure the quality of the project, reduce risks, and control costs. The invention is original and innovative.

[0110] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction method for accurately controlling the squeezing of silt by riprap on water, characterized in that: The following steps are involved: Step S1, transportation and positioning, using a transport ship to transport the blocks to the construction area, accurately positioning the construction area, and then starting the detection device (4); Step S2, determining the process parameters, and determining the first stone riprap silt squeezing depth H according to the design target value; Step S3, trial throwing and parameter adjustment, conduct trial throwing test, measure the depth of stone blocks squeezing silt into mud in real time, evaluate the effect of entering mud according to monitoring data; dynamically adjust throwing parameters, correct and optimize the nth stone throwing silt squeezing depth H n ; Step S4, continuous dumping operation, moving the excavator (5), and continuing the dumping operation of the block stones (6) according to the predetermined dumping position and lifting height h1; Step S5: monitoring the change of the mud surface. During the dumping process, the dynamic changes of the mud surface in the area are continuously monitored; Step S6, treating the sludge heave, starting the sludge treatment device (1) to break up the heaved sludge bag (7); Step S7, dynamically adjusting the lifting height of the stone (6) according to the tide level; Step S8, continue to rip rocks and squeeze out silt, continue to rip rocks and squeeze out silt; Step S9, completing the riprap and silt removal engineering quantity required by the structural design, and ending the riprap and silt removal task on water.

2. A construction method for accurately controlling the squeezing of silt by riprap on water according to claim 1, characterized in that: The detection device (4) in step S1 is located on the bottom surface of the transport ship; the detection device (4) comprises a depth sounder.

3. A construction method for accurately controlling the squeezing of silt by riprap on water according to claim 2, characterized in that: The calculation formula of the silt squeezing depth H of the first stone riprap in step S2 is as follows: Among them, H is the depth of the first stone into the mud, that is, the depth of the first stone riprap to squeeze the silt, γ r is the density of the rock, g is the acceleration due to gravity, v is the volume of the rock, γ s is the density of silt, k0 is the static earth pressure coefficient of silt, k p is the passive earth pressure coefficient of silt, b is the side length of the block, c is the cohesion of silt, is the internal friction angle of the silt, A1 is the area of ​​the stone perpendicular to the moving path, ρ w is the density of water, H1 and H2 are the height of the first stone and the water depth when the first stone is thrown, respectively, and f w is the water resistance coefficient.

4. The construction method according to claim 3, characterized in that: The trial throwing test in step S3 comprises the following steps: Step S301: According to the calculation result in step S2, the excavator lifts the rock and dumps it to the designated location; Step S302, using a depth measuring device to scan and measure the depth of the rock blocks squeezing into the mud; Step S303: If the depth of the first stone riprap in step S2 is not reached, select a stone with a larger weight and repeat steps S2, S301 and S302 until the depth of the stone riprap in S302 reaches the depth of the first stone riprap in step S2.

5. The construction method according to claim 4, characterized in that: In step S3, the filling parameters are dynamically adjusted by the calculation formula of the riprap depth of the nth stone, and the riprap depth H of the nth stone is corrected and optimized. n , the formula is as follows: Where n is the nth stone throwing, n is an integer greater than or equal to 2, H n is the depth of the nth rock riprap, v n is the volume of the nth stone, A n is the end area of ​​the nth stone, b n is the side length of the nth stone, b n-1 is the side length of the n-1th stone, h1 is the height of the nth stone, h2 is the water depth when the nth stone is thrown, and h n h′ is the depth to which the nth stone sinks further under the impact of the n-1th stone, n is the depth of the nth stone into the mud.

6. The construction method according to claim 5, characterized in that: In the step S6, when it is monitored that the height of the mud surface rises to more than 50 cm, the mud disposal device (1) is started.

7. The construction method according to claim 6, characterized in that: In step S8, every time the tide level drops by 1 m, the lifting height of the stone is recalculated to adapt to environmental changes.

8. A sludge disposal device used in the construction method according to any one of claims 1 to 7, characterized in that: The device breaks up the sludge bags by stirring and water flushing, and controls the bulge height of the sludge bags to be below 20 cm.

9. The sludge disposal device according to claim 8, characterized in that: The device comprises a water pipe (101), a supporting structure, a driving motor (104), rotatable blades (105) and a high-pressure nozzle (106); One end of the support structure is mounted on the deck (2) of the transport ship, and the other end is mounted with a drive motor (104); A rotatable blade (105) is installed at the front end of the driving motor (104); A high-pressure nozzle (106) is installed at the front end of the rotatable blade (105); The water pipe (101) is installed inside the supporting structure, one end of the water pipe (101) is connected to the water pump (3) of the transport ship, and the other end is connected to the high-pressure nozzle (106).

10. The sludge disposal device according to claim 9, characterized in that: The support structure comprises a plurality of brackets (102) and a plurality of folding joints (103), and adjacent brackets (102) are connected via the folding joints (103); The support (102) adopts a truss structure.

Images