Large open caisson deflecting type intelligent sinking assisting and accurate in-position method

Abstract

The invention discloses a large open caisson deflecting type intelligent sinking assisting and accurate in-place method. The method specifically comprises the following steps that S1, an angular point method is used; s2, a'holosymmetric deflecting type 'is used; the invention relates to the technical field of intelligent control of open caisson construction. According to the large open caisson deflecting type intelligent sinking assisting and accurate in-place method, the attitude information of the open caisson is obtained in real time, the attitude micro-inclination state is created, the double effects of sinking assisting and accurate in-place are achieved, operation is easy and easy to implement, the problems existing in the prior art are well solved, and the method is suitable for large open caisson deflecting type intelligent sinking assisting and accurate in-place. A plurality of sets of angle sensors are installed on the inner side of the outer well wall of the open caisson every time the height of the open caisson is increased, a full-new-generation Beidou remote displacement measurement system is installed on the top face after the height of the open caisson is increased every time, four monitoring points are arranged at the four corners of the top of the open caisson, a datum point is arranged on the earth surface which is larger than 200 m away from the open caisson, measurement point position marks are set, and a real-time relative positioning system is formed. And the positioning instrument is reinstalled in the multi-time height addition process of the open

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent control of open caisson construction, and specifically provides a method for large open caisson inclined intelligent sinking and precise positioning. Background Technique

[0002] During the construction process of open caissons, the following situations are generally encountered: difficult sinking, displacement, torsion, inclination, etc. To avoid these abnormal situations, precise control of the construction process is required. Especially for difficult sinking, asphalt oil is usually applied to the outer wall of the open caisson to reduce the friction between the well wall and the soil. Other sinking assistance methods include: top loading, pouring drag reduction mud, air curtain drag reduction, water curtain drag reduction, etc. In reality, even after comprehensively adopting the above methods, the sinking is still difficult, and the cost of taking measures is constantly increasing. The sinking process of the open caisson can be divided into an active period, a stable period, and a final sinking period. During the sinking process of the first section of the open caisson, from the start of sinking to one-third of the sinking depth, this period is the active period, which is characterized by easy deviation and relatively easy deviation correction. From one-third to two-thirds of the sinking depth of the open caisson, this period is the stable period, which is characterized by a reduced frequency of deviation and relatively difficult deviation correction. From two-thirds of the well sinking depth to the completion of sinking, this period is the final sinking period, which is characterized by a very low frequency of deviation. Once deviation occurs, it is very difficult to correct. For conventional deviation correction measures, the elevation and plane position of the well wall are timely monitored through total station and level. The control of the elevation of the open caisson is to set a scale ruler on the outer side of the well wall of the open caisson and set a bench mark near the open caisson to control the elevation of the open caisson. The control of the plane position of the open caisson is to set 4 measuring points on the top of the pool wall of the open caisson, and the coordinate values of the measuring points after sinking are measured by a total station. The deviation of the open caisson position is calculated by comparing the coordinate values. During excavation, the deviation value and elevation of the open caisson are observed at any time, once every 2 hours, and the measurement person in charge makes records. Currently, the commonly used deviation correction measures are mainly: changing the position and depth of the soil extraction area in the well to correct the position deviation of the open caisson through fine adjustment; setting a hollow open caisson partition wall and adjusting the position deviation by adding weight to the hollow open caisson partition wall.

[0003] The currently used sinking assistance methods have the defects of high cost and poor effect, and more economical sinking assistance methods need to be found. Conventional deviation correction measures can only correct deviations in a small range and are powerless when there are large position deviations. Measures and methods that can solve large position deviations of open caissons need to be found. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a method for large open caisson inclined intelligent sinking and precise positioning, which solves the problems mentioned in the above background technique.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A method for large open caisson inclined intelligent sinking and precise positioning specifically includes the following steps: S1. Use the "corner point method": According to the feedback data of the new generation Beidou remote displacement measurement system, obtain the elevation difference of the four corners of the caisson, determine the corner position for soil extraction based on the elevation difference, compare the elevations of the four corners, and continuously obtain the elevations of the four corners of the caisson according to the feedback data of the new generation Beidou remote displacement measurement system during the process to judge whether it is necessary to start the "corner point method" to adjust the attitude of the caisson until the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson; S2. Use the "fully symmetric inclined drilling method": When the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson and sinking difficulties and slow sinking speeds occur, enable the fully symmetric inclined drilling method for soil extraction to assist sinking. After completing the cyclic soil extraction operation, check the elevation difference situation of the caisson, compare the elevations of the four corners, and if the difference between any two is greater than 5 cm, transfer to the "corner point method" construction to make the difference between any two less than or equal to 5 cm; S3. Use the "semi - symmetric inclined drilling method" for fine - tuning the position of the caisson: When the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson and deviation occurs, use the "semi - symmetric inclined drilling method" for soil extraction to achieve precise positioning.

[0006] S4. Use the "strong swing method" to quickly callback and straighten the position of the caisson: When over - range swinging occurs during the use of the "fully symmetric inclined drilling method" and the "semi - symmetric inclined drilling method", inject water eccentrically into the empty bin on the high - side caisson wall to achieve forced callback and straightening.

[0007] Preferably, in the above - mentioned S1, when comparing the elevations of the four corners, if the difference between any two is greater than 5 cm, take the highest point of the four corners as the corner position for soil extraction, and gradually and evenly extract soil from the 1 / 4 area where this corner point is located. When the difference between any two is less than or equal to 5 cm, suspend the soil extraction operation using the corner point method and switch to uniform soil extraction in the entire area to achieve the initial sinking of the caisson.

[0008] Preferably, in the above - mentioned S2, the soil extraction steps specifically include the following steps: A1. Gradually extract soil from the inner side of one short side of the caisson to the inner side of the other short side. The soil extraction method changes gradually from a depth of 50 cm to 20 cm. During the process, receive the information of the angle sensor. When the inclination angle of the short - side wall swings within the range of 0° - 1.5°, the soil extraction operation can be repeated, and the soil extraction method changes gradually from a depth of 50 cm to 20 cm. When the inclination angle of the short - side wall swings within the range of 1.5° - 2°, suspend the soil extraction operation for 30 - 60 minutes; A2. Then, gradually take soil from the inner side of the short side on the other side of the caisson towards one short side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of the short side on the other side of the caisson towards one short side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the first self-righting is achieved, and the soil-taking operation can be paused for 30 - 60 minutes. A3. Then, gradually take soil from the inner side of the short side on the other side of the caisson towards one short side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the short-side wall swings within the range of 1.5° - 2°, the soil-taking operation is paused for 30 - 60 minutes. A4. Then, gradually take soil from the inner side of one short side of the caisson towards the other short side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of one short side of the caisson towards the other short side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the second self-righting is achieved, and the soil-taking operation can be paused for 30 - 60 minutes. A5. Next, gradually take soil from the inner side of one long side of the caisson towards the other long side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the long-side wall swings within the range of 1.5° - 2°, the soil-taking operation is paused for 30 - 60 minutes. A6. Then, gradually take soil from the inner side of the other long side of the caisson towards one long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of the other long side of the caisson towards one long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the third self-righting is achieved, and the soil-taking operation can be paused for 30 - 60 minutes. A7. Then, gradually take soil from the inner side of the long side on the other side of the caisson towards one long side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the long side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the long side wall swings within the range of 1.5° - 2°, suspend the soil-taking operation for 30 - 60 minutes. A8. Then, gradually take soil from the inner side of one long side of the caisson towards the other long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of one long side of the caisson towards the other long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the long side wall swings within the range of 0° - 0.5°, the fourth self-righting is achieved, and the soil-taking operation can be suspended for 30 - 60 minutes.

[0009] Preferably, in S3, the specific steps of the "semi-symmetric inclined construction" soil-taking method are as follows: B1. First, according to the feedback data of the new generation Beidou long-distance displacement measurement system, judge the deviation direction of the long side and short side of the caisson. First, take soil from the opposite side of the side where the short side of the caisson deviates towards the center position of the caisson. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the short side wall swings within the range of 0.5° - 1°, suspend the soil-taking operation for 30 - 60 minutes. B2. Change to taking soil from the center position of the caisson towards the side where the short side deviates. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the short side wall swings within the range of 0.5° - 1°, suspend the soil-taking operation for 30 - 60 minutes. B3. Then, quickly take soil on the side where the short side deviates. During the process, receive the information from the angle sensor. When the inclination of the short side wall swings to about 0°, suspend the operation to complete one correction of the deviation on the short side. B4. Then, first take soil from the opposite side of the side where the long side of the caisson deviates towards the center position of the caisson. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the long side wall swings within the range of 0.5° - 1°, suspend the soil-taking operation for 30 - 60 minutes. B5. Change to taking soil from the center of the caisson to the side deviating from the long side. The soil taking method is gradual from the depth of 25cm to 0cm. During the process, the angle sensor information is received. When the inclination of the long side wall swings to the range of 0°-0.5°, the soil taking operation in the same way as above can be repeated. When the inclination of the long side wall swings to the range of 0.5°-1°, the soil taking operation is suspended for 30-60 minutes. B6. Then quickly take soil from the side where the long side deviates, receive information from the angle sensor during the process, and suspend the operation when the inclination of the long side wall swings to about 0°, completing a correction of the long side deviation. Beneficial Effects

[0010] The present invention provides a large-scale caisson inclined intelligent sinking assistance and precise positioning method. Compared with the prior art, it has the following beneficial effects: the large-scale caisson inclined intelligent sinking assistance and precise positioning method can achieve the dual effects of sinking assistance and precise positioning by acquiring the attitude information of the caisson in real time and creating a slightly inclined attitude state. The operation is simple and easy, and it has overcome the problems existing in the prior art. After each height connection of the caisson is completed, multiple groups of angle sensors are installed on the inner side of the outer wall of the caisson, and a new generation of Beidou remote displacement measurement system is installed on the top surface after each height connection of the caisson is completed. Four monitoring points are arranged at the four corners of the top of the caisson, and one reference point is arranged on the surface more than 200m away from the caisson, and a measurement point mark is set to form a real-time relative positioning system. The positioner is reinstalled during the multiple height connections of the caisson, and a total station is used for verification when necessary. Both the monitoring points and the reference points should ensure satellite search. The conditions are good, the location is open, there should be no large obstacles above the ±15° height cutoff angle to receive satellite signals, and there are no electromagnetic interference sources such as high-voltage lines and substations around. The system transmits the GNSS positioning measurement data of each monitoring point on the caisson top to the monitoring center in real time through wireless networking. The monitoring center can obtain the plane coordinates and elevation of each monitoring point in real time. Through calculation and analysis, the inclination and direction of each measuring edge can be obtained, thereby realizing real-time display of the center position, elevation, plane torsion angle, inclination and other geometric shapes and changes of the caisson top. Because it adopts GNSS carrier phase difference technology, the plane accuracy of its geometric information can reach ±1~2cm, and the elevation accuracy is ±2~3cm, which can fully meet the needs of caisson construction quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0012] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0013] Please refer to Figure 1 , the present invention provides a technical solution: a large caisson inclined intelligent sinking and precise positioning method, which specifically includes the following steps: S1. Use the "corner point method": According to the feedback data of the new generation Beidou remote displacement measurement system, obtain the height difference at the four corners of the caisson, determine the corner position for soil extraction according to the height difference situation, compare the elevations of the four corners, and continuously obtain the elevations of the four corners of the caisson according to the feedback data of the new generation Beidou remote displacement measurement system during the process, and judge whether it is necessary to start the "corner point method" to adjust the attitude of the caisson until the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson; S2. Use the "fully symmetric inclined type": When the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson and sinking difficulties and slow sinking speeds occur, enable the fully symmetric inclined soil extraction method to assist in sinking. After completing the cyclic soil extraction operation, check the height difference situation of the caisson, compare the elevations of the four corners, and if the difference between any two is greater than 5 cm, transfer to the "corner point method" construction to make the difference between any two less than or equal to 5 cm; S3. Use the "semi-symmetric inclined type" to finely adjust the position of the caisson: When the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson and deviation occurs, use the "semi-symmetric inclined type" soil extraction method for precise positioning.

[0014] S4. Use the "strong swing method" to quickly callback and straighten the position of the caisson: When over-range swinging occurs when using the "fully symmetric inclined type" and the "semi-symmetric inclined type", eccentrically inject water into the empty caisson wall at the high position to achieve forced callback and straightening.

[0015] In the present invention, in S1, when comparing the elevations of the four corners, if the difference between any two is greater than 5 cm, take the highest point of the four corners as the corner position for soil extraction, and gradually and evenly extract soil from the 1 / 4 area where the corner point is located. When the difference between any two is less than or equal to 5 cm, suspend the corner point method soil extraction operation and switch to uniform soil extraction in the whole area to realize the preliminary sinking of the caisson.

[0016] In the present invention, in S2, the soil extraction steps specifically include the following steps: A1. Gradually take soil from the inner side of the short side of the open caisson on one side to the inner side of the short side on the other side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the short-side wall swings within the range of 1.5° - 2°, suspend the soil-taking operation for 30 - 60 minutes. A2. Then gradually take soil from the inner side of the short side of the open caisson on the other side to the short side on one side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of the short side of the open caisson on the other side to the short side on one side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the first self-righting is achieved, and the soil-taking operation can be suspended for 30 - 60 minutes. A3. Then gradually take soil from the inner side of the short side of the open caisson on the other side to the short side on one side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the short-side wall swings within the range of 1.5° - 2°, suspend the soil-taking operation for 30 - 60 minutes. A4. Then gradually take soil from the inner side of the short side of the open caisson on one side to the short side on the other side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of the short side of the open caisson on one side to the short side on the other side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the second self-righting is achieved, and the soil-taking operation can be suspended for 30 - 60 minutes. A5. Then gradually take soil from the inner side of the long side of the open caisson on one side to the long side on the other side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the long-side wall swings within the range of 1.5° - 2°, suspend the soil-taking operation for 30 - 60 minutes. A6. Then, gradually take soil from the inner side of the long side on the other side of the open caisson towards one long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of the long side on the other side of the open caisson towards one long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the third self-righting is achieved, and the soil-taking operation can be paused for 30 - 60 minutes. A7. Then, gradually take soil from the inner side of the long side on the other side of the open caisson towards one long side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the long-side wall swings within the range of 1.5° - 2°, the soil-taking operation is paused for 30 - 60 minutes. A8. Then, gradually take soil from the inner side of one long side of the open caisson towards the other long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of one long side of the open caisson towards the other long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the fourth self-righting is achieved, and the soil-taking operation can be paused for 30 - 60 minutes.

[0017] In the present invention, in S3, the specific steps of the "semi-symmetric inclined boring" soil-taking method are as follows: B1. First, according to the feedback data of the new generation of Beidou long-distance displacement measurement system, judge the deviation direction of the long side and the short side of the open caisson. First, take soil from the opposite side of the side where the short side of the open caisson deviates towards the center position of the open caisson. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the short-side wall swings within the range of 0.5° - 1°, the soil-taking operation is paused for 30 - 60 minutes. B2. Change to taking soil from the center position of the open caisson towards the side where the short side deviates. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the short-side wall swings within the range of 0.5° - 1°, the soil-taking operation is paused for 30 - 60 minutes. B3. Then, quickly take soil on the side where the short side deviates. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings to about 0°, pause the operation to complete one correction of the deviation on the short-side. B4. First, take soil from the opposite side of the side where the long side of the open caisson deviates, towards the center position of the open caisson. The soil-taking method is gradually changed from a depth of 25 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the long-side wall swings within the range of 0.5° - 1°, pause the soil-taking operation for 30 - 60 minutes. B5. Change to taking soil from the center position of the open caisson towards the side where the long side deviates. The soil-taking method is gradually changed from a depth of 25 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the long-side wall swings within the range of 0.5° - 1°, pause the soil-taking operation for 30 - 60 minutes. B6. Then, quickly take soil on the side where the long side deviates. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings to about 0°, pause the operation to complete one-time correction of the deviation on the long-side.

[0018] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0019] Due to different engineering geology, the inclination of the wall swing is often restricted, that is, it cannot reach the expected swing angle to achieve the deviation effect. To overcome this defect, the open caisson structure is correspondingly transformed, which can perfectly achieve the deviation effect during the sinking process. The open caisson structure is designed as a hollow wall structure. The vertical and horizontal partition walls above the 1 / 3 position of the total height of the open caisson can be designed as hollow structures. Water, sand, mud and other substances can be added to the middle hollow body, and using the hydraulic principle, the added water, sand, mud and other substances can freely enter and flow out of the middle hollow body. By adding water, sand, mud and other substances and cooperating with the deviation method for assisting sinking and precise positioning. In particular, the middle hollow body is divided into multiple non-connected areas, and different heights of water, sand, mud and other substances are added to each area to realize the reconstruction of the overall center of gravity of the open caisson, which can forcibly create a deviation, forcibly return to the correct position, and have a better assisting sinking effect. With the reconstruction of the overall center of gravity of the open caisson, the precise positioning of the open caisson can be achieved by using the deviation soil-taking method.

[0020] The specific improvement implementation methods are as follows: When the sinking depth of the open caisson exceeds 1 / 2 of the long side length of the open caisson, it is difficult to sink, and the sinking speed is slow. It is still difficult to use the fully symmetric inclined soil-taking method to assist sinking, and it is difficult to cause the wall to swing. The gravity reconstruction propulsion inclined method can be adopted, and the steps are as follows: Take soil gradually from the inner side of the short side of one side of the open caisson to the inner side of the short side of the other side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm each time. During the process, the information of the angle sensor is received. When the inclination swing of the short side wall is less than 0.1°, in order to make the short side on this side form an outward inclined effect, substances such as water, sand, and mud can be added to the middle hollow body of the open caisson. In the area from one short side to the other short side, each partition area of the middle hollow body is filled in a phased stepped manner to realize the overall gravity reconstruction of the open caisson, and the gravity inclines towards this short side. Utilize the inclined plane formed on the bottom surface to make the inclination of the short side wall gradually swing to 1°. After stabilizing for 30 minutes, the added water, sand, mud and other substances are gradually and orderly pumped out from each partition area of the middle hollow body. Then take soil gradually from the inner side of the short side of the other side of the open caisson to the short side of one side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm each time. After completion, stabilize for 30 minutes; then take soil gradually from the inner side of the short side of the other side of the open caisson to the inner side of the short side of one side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm each time. During the process, the information of the angle sensor is received. When the inclination swing of the short side wall is less than 0.1°, in order to make the other short side form an outward inclined effect, substances such as water, sand, and mud can be added to the middle hollow body of the open caisson. In the area from the other short side to the short side of one side, each partition area of the middle hollow body is filled in a phased stepped manner to realize the overall gravity reconstruction of the open caisson, and the gravity inclines towards this other short side. Utilize the inclined plane formed on the bottom surface to make the inclination of the short side wall gradually swing to 1°. After stabilizing for 30 minutes, the added water, sand, mud and other substances are gradually and orderly pumped out from each partition area of the middle hollow body; then take soil gradually from the inner side of the short side of one side of the open caisson to the short side of the other side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm each time. After completion, stabilize for 30 minutes; complete one complete outward inclination and inclination of the two sides of the short side of the open caisson to reduce the frictional resistance of the short side. If the open caisson can sink normally, the "corner point method" can be used to take soil and sink; if it is still difficult to sink, the same method can be used to make the two sides of the long side of the open caisson incline outward to assist sinking.

[0021] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device.

[0022] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for intelligent auxiliary sinking and precise positioning of a large caisson with inclined shaft, characterized in that: Specifically, it includes the following steps: S1. Use the "corner point method": According to the feedback data of the new generation Beidou long-distance displacement measurement system, obtain the elevation difference at the four corners of the caisson. Determine the corner position for soil extraction based on the elevation difference situation, and compare the elevations of the four corners. During the process, continuously obtain the elevations of the four corners of the caisson according to the feedback data of the new generation Beidou long-distance displacement measurement system, and judge whether it is necessary to start the "corner point method" to adjust the caisson attitude until the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson; S2. Use the "fully symmetric inclined drilling method": When the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson and there are difficulties in sinking and the sinking speed is slow, enable the fully symmetric inclined drilling method for soil extraction to assist in sinking. After completing the cyclic soil extraction operation, check the elevation difference situation of the caisson, compare the elevations of the four corners. If the difference between any two is greater than 5 cm, transfer to the "corner point method" construction to make the difference between any two less than or equal to 5 cm; S3. Use the "semi-symmetric inclined drilling method" to finely adjust the position of the caisson: When the penetration depth of the caisson exceeds 1 / 2 of the long side length of the caisson and there is deviation, use the "semi-symmetric inclined drilling method" for soil extraction to achieve precise positioning; S4. Use the "strong swing method" to quickly callback and straighten the position of the caisson: When the "fully symmetric inclined drilling method" or the "semi-symmetric inclined drilling method" results in out-of-range swinging, inject water eccentrically into the empty caisson wall at a high position to achieve forced callback and straightening.

2. A large caisson inclined construction intelligent sinking and precise positioning method according to claim 1, characterized in that: In the above S1, when comparing the elevations of the four corners, if the difference between any two is greater than 5 cm, take the highest point of the four corners as the corner position for soil extraction, and gradually extract soil evenly from the 1 / 4 area where this corner point is located. When the difference between any two is less than or equal to 5 cm, suspend the soil extraction operation using the corner point method and switch to uniform soil extraction in the whole area to achieve the initial sinking of the caisson.

3. A large caisson inclining intelligent sinking and precise positioning method according to claim 1, characterized in that: In the above S2, the soil extraction steps specifically include the following steps: A1. Gradually extract soil from the inner side of one short side of the caisson to the inner side of the other short side. The soil extraction method changes gradually from a depth of 50 cm to 20 cm. During the process, receive the information of the angle sensor. When the inclination of the short side wall swings within the range of 0° - 1.5°, the soil extraction operation can be repeated, and the soil extraction method changes gradually from a depth of 50 cm to 20 cm. When the inclination of the short side wall swings within the range of 1.5° - 2°, suspend the soil extraction operation for 30 - 60 minutes; A2. Then gradually extract soil from the inner side of the other short side of the caisson to one short side. The soil extraction method changes gradually from a depth of 30 cm to 0 cm. During the process, receive the information of the angle sensor. When the inclination of the short side wall swings within the range of 1.5° - 0.5°, the soil extraction operation can be repeated, gradually extracting soil from the inner side of the other short side of the caisson to one short side, and the soil extraction method changes gradually from a depth of 30 cm to 0 cm. When the inclination of the short side wall swings within the range of 0° - 0.5°, achieve the first self - straightening, and the soil extraction operation can be suspended for 30 - 60 minutes; A3. Then, gradually take soil from the inner side of the short side on the other side of the open caisson towards one short side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the short-side wall swings within the range of 1.5° - 2°, suspend the soil-taking operation for 30 - 60 minutes. A4. Then, gradually take soil from the inner side of one short side of the open caisson towards the other short side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the short-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of one short side of the open caisson towards the other short side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the second self-righting is achieved, and the soil-taking operation can be suspended for 30 - 60 minutes. A5. Next, gradually take soil from the inner side of one long side of the open caisson towards the other long side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the long-side wall swings within the range of 1.5° - 2°, suspend the soil-taking operation for 30 - 60 minutes. A6. Then, gradually take soil from the inner side of the other long side of the open caisson towards one long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of the other long side of the open caisson towards one long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the third self-righting is achieved, and the soil-taking operation can be suspended for 30 - 60 minutes. A7. Then, gradually take soil from the inner side of the other long side of the open caisson towards one long side. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 1.5°, the soil-taking operation can be repeated. The soil-taking method is a gradual change from a depth of 50 cm to 20 cm. When the inclination of the long-side wall swings within the range of 1.5° - 2°, suspend the soil-taking operation for 30 - 60 minutes. A8. Then, gradually take soil from the inner side of one long side of the open caisson towards the other long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. During the process, receive the information from the angle sensor. When the inclination of the long-side wall swings within the range of 1.5° - 0.5°, the soil-taking operation can be repeated. Gradually take soil from the inner side of one long side of the open caisson towards the other long side. The soil-taking method is a gradual change from a depth of 30 cm to 0 cm. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the fourth self-righting is achieved, and the soil-taking operation can be suspended for 30 - 60 minutes.

4. A large caisson inclining intelligent sinking and precise positioning method according to claim 1, characterized in that: In step S3, the specific steps of the "semi-symmetric inclined boring" soil-taking method are as follows: B1. First, based on the feedback data of the brand-new generation Beidou long-distance displacement measurement system, determine the direction of deviation of the long side and short side of the caisson. First, take soil from the opposite side of the side where the short side of the caisson deviates towards the center position of the caisson. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information of the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the short-side wall swings within the range of 0.5° - 1°, suspend the soil-taking operation for 30 - 60 minutes. B2. Change to taking soil from the center position of the caisson towards the side where the short side deviates. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information of the angle sensor. When the inclination of the short-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the short-side wall swings within the range of 0.5° - 1°, suspend the soil-taking operation for 30 - 60 minutes. B3. Then quickly take soil on the side where the short side deviates. During the process, receive the information of the angle sensor. When the inclination of the short-side wall swings to about 0°, suspend the operation to complete one correction of the deviation on the short-side. B4. Then, first take soil from the opposite side of the side where the long side of the caisson deviates towards the center position of the caisson. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information of the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the long-side wall swings within the range of 0.5° - 1°, suspend the soil-taking operation for 30 - 60 minutes. B5. Change to taking soil from the center position of the caisson towards the side where the long side deviates. The soil-taking method is a gradual change from a depth of 25 cm to 0 cm. During the process, receive the information of the angle sensor. When the inclination of the long-side wall swings within the range of 0° - 0.5°, the above-mentioned same soil-taking operation can be repeated. When the inclination of the long-side wall swings within the range of 0.5° - 1°, suspend the soil-taking operation for 30 - 60 minutes. B6. Then quickly take soil on the side where the long side deviates. During the process, receive the information of the angle sensor. When the inclination of the long-side wall swings to about 0°, suspend the operation to complete one correction of the deviation on the long-side.

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