Construction method of mud circulating integrated construction platform

Abstract

A construction method of a mud circulating integrated construction platform, comprising the following steps: S1. constructing a first steel platform foundation: inserting and driving steel pipe piles as first columns in water, installing first horizontal connections between the first columns, installing first distribution beams in a transverse direction between the top of the first columns, installing first longitudinal beams in a longitudinal direction between the top of the first distribution beams, and installing first horizontal beams in a transverse direction between the top of the first longitudinal beams; S2. installing a circulating pool and a settling pool above the first horizontal connections; and S3. installing first face plates on the top of the first horizontal beams. The method can reduce the occupation of a river channel and meet the mud circulating requirements of a bored pile construction by reasonably arranging mud pools on the construction platform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water construction, in particular to a construction method of a mud circulating integrated construction platform. BACKGROUND

[0002] In the process of water pile construction, in order to prevent the occurrence of phenomena such as hole expansion, hole collapse and necking, and to maintain the stability of the hole wall, mud is often pressed into the hole during drilling. However, since the mud extracted from the pile hole carries drill cuttings at the bottom of the hole, it cannot be directly reused, resulting in the need for a mud pool for mud circulation at the construction site. The setting of the mud pool is currently the most difficult to handle. Currently, two methods are commonly used: (1) using a steel casing as a mud pool, such as the invention patent application "Deep water pile foundation mud circulating construction system and circulating construction method" of CN113404450A, which discloses a mud circulating construction system comprising: a first pile foundation steel casing, a first connecting port is formed in the upper part of the first pile foundation steel casing; a second pile foundation steel casing is arranged adjacent to the first pile foundation steel casing, a second connecting port is formed in the upper part of the second pile foundation steel casing opposite to the first connecting port; a connecting pipe, the first port of the connecting pipe is in communication with the first connecting port, the second port of the connecting pipe is in communication with the second connecting port, a mud filtering device is arranged in the connecting pipe; a mud pump assembly for alternating mud pumping between the first pile foundation steel casing and the second pile foundation steel casing, the mud pump assembly comprises a mud pump body and a pumping pipe connected with the mud pump body. The invention uses the second pile foundation steel casing as a circulating pool. This arrangement of the mud pool saves space, but due to the small size of the steel casing, it is difficult to fully meet the mud flow of the mud pool, resulting in unsatisfactory mud circulating effect, long construction period, and the mud and drill cuttings formed at the bottom of the steel casing are difficult to completely remove, which will have some impact on the riverbed environment; (2) the mud pool is arranged on the construction platform. Currently, the mud pool is generally in the form of a rectangular whole steel structure, which occupies a large space, is inconvenient to transport, has a large impact on navigation, and has high construction cost. Therefore, it is necessary to study a water construction platform that can reduce the occupation of the river and reasonably arrange the mud pool to meet the mud circulating requirements of pile construction. SUMMARY

[0003] The present application discloses a construction method of a mud circulating integrated construction platform, which can reduce the occupation of the river and meet the mud circulating requirements of pile construction by reasonably arranging the mud pool on the construction platform.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A construction method of a mud circulating integrated construction platform, comprising the following steps:

[0006] S1. Construct the foundation of the first steel platform: drive steel pipe piles into the water as the first columns, install the first horizontal connectors between the first columns, and form a cube with the first columns and the first horizontal connectors; install the first distribution beams horizontally between the tops of the first columns, and the first distribution beams are perpendicular to the first columns; install the first longitudinal beams vertically between the tops of the first distribution beams, and the first longitudinal beams are perpendicular to the first distribution beams; install the first transverse beams horizontally at the tops of the first longitudinal beams, and the first transverse beams are perpendicular to the first longitudinal beams.

[0007] S2. Install the circulation tank and sedimentation tank: Both the circulation tank and the sedimentation tank are prefabricated mud tanks, placed on the first horizontal connection. The height of the mud tank body in the prefabricated mud tank is lower than the first longitudinal beam. A mud tank circulation pipe or mud chute is installed between the upper parts of the circulation tank and the sedimentation tank to connect them.

[0008] S3. Install the first panel: Install the first panel on the top of the first crossbeam. The first panel has reserved space for the construction of the bored pile. The first panel includes a prefabricated panel and a fixed panel. The area above the circulation tank and the sedimentation tank corresponding to the area where the first panel is installed is set as a prefabricated panel, and the remaining area is a fixed panel. The fixed panel is welded to the first crossbeam, and the prefabricated panel is detachably connected to the first crossbeam / first longitudinal beam.

[0009] Furthermore, the installation steps for the second steel platform include: driving steel pipe piles into the water as second columns; installing a second horizontal connector between the second columns, with the second columns and the second horizontal connector forming a cube; installing a second distribution beam longitudinally between the tops of the second columns, with the second distribution beam perpendicular to the second columns; installing a first longitudinal beam transversely between the tops of the second distribution beams, with the second longitudinal beam perpendicular to the second distribution beam; installing a second horizontal beam longitudinally on top of the second longitudinal beam, with the second horizontal beam perpendicular to the second longitudinal beam; and installing a second panel on top of the second longitudinal beam.

[0010] The second steel platform is set on one side of the first steel platform, and the first panel and the second panel are spliced ​​together;

[0011] The installation of the second steel platform may be performed before step S1, after step S1 / step S2 / step S3, or simultaneously with step S1 / step S2 / step S3.

[0012] Furthermore, the assembled panel is connected by U-bolts, washers, and nuts. The assembled panel has a through hole in the vertical direction. The two ends of the U-bolt pass through the through hole of the assembled panel. The washers are inserted from below into the two ends of the U-bolt and are locked under the first crossbeam / first longitudinal beam. The nuts are screwed into the two ends of the U-bolt to fix the assembled panel.

[0013] Furthermore, the prefabricated mud pit includes a bottom mold, side molds, a mixing system, and a slurry-stopping mechanism, wherein: the bottom mold is circular; the side mold includes at least two side mold units, which are horizontally spliced ​​together to form a cylindrical shape, and the bottom is connected to the bottom mold to form the mud pit body; the mixing system includes a mixer and a mixing support mechanism; the slurry-stopping mechanism includes a slurry-stopping plate, a slurry-stopping sealing plate, and a slurry-stopping stiffening plate, the slurry-stopping plate is annular, connected to the bottom mold at the bottom, and its outer diameter matches the inner diameter of the side mold; multiple triangular slurry-stopping stiffening plates are spaced apart on the inner wall, the bottom of the slurry-stopping stiffening plate is connected to the bottom mold, and its inner side is connected to the annular slurry-stopping sealing plate; the slurry-stopping sealing plate covers the space enclosed by the slurry-stopping stiffening plate, the slurry-stopping plate, and the bottom mold.

[0014] Step S2 specifically includes: connecting the bottom mold to the slurry-stopping mechanism and placing it on the first horizontal connection; connecting the side mold units together with bolts to form a side mold; then placing the side mold on the bottom mold in accordance with the slurry-stopping plate and tightening the bolts; then installing the mixing support mechanism on the top of the side mold, connecting the upper end of the mixer to the mixing support mechanism, and extending the lower part into the space enclosed by the bottom mold and the side mold.

[0015] Furthermore, the bottom mold includes a bottom mold body and bottom mold reinforcing ribs. The bottom mold body is circular, and several bottom mold reinforcing ribs are connected at intervals on the bottom. Bottom mold reinforcing ribs are also connected vertically at intervals between the bottom mold reinforcing ribs.

[0016] The side mold unit includes a side mold unit body, a clamp, and side mold reinforcing ribs. The side mold unit body has an arc-shaped transverse cross-section, and multiple vertically arranged side mold reinforcing ribs are connected at intervals on the outer wall. Side mold unit connecting plates are provided on both sides of the outer wall. A transversely arranged arc-shaped clamp is connected to the outer side of the side mold reinforcing rib, and clamp connecting plates are also provided at both ends of the clamp. The side mold unit connecting plates and clamp connecting plates of adjacent side mold units are fastened together by side mold connectors to form the side mold.

[0017] Furthermore, the first longitudinal beam is made of Bailey sheets.

[0018] Furthermore, the second longitudinal beam is made of Bailey sheets.

[0019] Furthermore, the system also includes the installation steps of a mud management system: the mud management system is placed on a first steel platform, and includes a mud preparation device, a third mud pump, a mud inlet pipe, a first mud delivery pipe, a sand separating device, a second mud delivery pipe, and an online density meter, wherein: the inlet of the first mud delivery pipe is connected to the outlet of the mud preparation device; the third mud pump is used to extract mud from the sedimentation tank; the mud inlet pipe is used to introduce mud containing drill cuttings extracted from the sedimentation tank or from the pile hole into the sand separating device; the online density meter is installed on the mud inlet pipe; the sand separating device is connected to the outlet of the mud inlet pipe and is used to perform preliminary screening of the mud containing drill cuttings introduced from the mud inlet pipe to separate mud and sand from mud; the inlet of the second mud delivery pipe is connected to the mud outlet of the sand separating device, the outlet extends into the circulation tank, and a mud regulating hole is provided that connects to the outlet of the first mud delivery pipe; the mud preparation device and the sand separating device are both mounted on a platform base.

[0020] Furthermore, the sand separating device includes a hydrocyclone, a primary screen, and a secondary screen. The primary and secondary screens are spaced apart at the bottom of the hydrocyclone, with the aperture of the primary screen being larger than that of the secondary screen. A vibrating motor is installed on the primary screen and / or the secondary screen. A primary slag outlet is provided on one side of the primary screen, and the primary slag outlet is inclined upward along the slag discharge direction. A secondary slag outlet is provided on one side of the secondary screen, and the secondary slag outlet is inclined upward along the slag discharge direction.

[0021] Furthermore, it also includes a controller, which is connected to the online density meter, the sand separating device, and the pulping device, respectively.

[0022] The construction method of the integrated mud circulation construction platform described above involves installing a first steel platform as a working platform for drilling operations and as a supporting platform for the circulation tank and sedimentation tank. The circulation tank and sedimentation tank are installed on the first horizontal connection, which can make full use of the lower space under the panel. In addition, the installation of a second steel platform can serve as a rebar cage hoisting operation area for placing rebar cages, cranes, and pile drivers, so that the construction platform meets the mud circulation requirements necessary for drilling operations.

[0023] The present invention has the following advantages:

[0024] (1) The sedimentation tank and the circulation tank are placed on the first horizontal connection using the space under the first panel, which reduces the occupation of the working space on the top surface of the platform and the occupation of the waterway.

[0025] (2) Prefabricated mud tanks are used as circulation tanks and sedimentation tanks. The bottom and side molds can be assembled on the shore and then hoisted to the platform for installation. The operation is convenient and the construction cycle is effectively shortened.

[0026] (3) The second steel platform is installed to place the steel cage, crane and pile driver, etc., to meet the requirements of integrated hoisting, drilling and mud circulation in bored pile construction.

[0027] (4) A mud management system is configured on the first steel platform. When the circulating mud is insufficient or the density does not meet the requirements, mud preparation and mud density adjustment can be carried out, which makes the circulating mud quality higher, improves the automation level of mud circulation, speeds up the pile foundation drilling speed, reduces the hole cleaning time, and makes slag removal more convenient.

[0028] (5) Using a mud management system to separate mud, cuttings and sand in the sedimentation tank can reduce the space occupied by cuttings and sand in the sedimentation tank and help reduce the problem of mud pollution in water. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the steps of the present invention.

[0030] Figure 2 This is a top view of the structure of the present invention (the first panel, first crossbeam, first longitudinal beam, first distribution beam, second panel, second crossbeam, second longitudinal beam, and second distribution beam are omitted).

[0031] Figure 3 yes Figure 2 A schematic diagram of the structure of section AA.

[0032] Figure 4 yes Figure 2 Schematic diagram of the BB section.

[0033] Figure 5 This is a top-down enlarged structural diagram of the pile hole, sedimentation tank, and circulation tank.

[0034] Figure 6 This is a magnified schematic diagram of the main structure of the pile hole, sedimentation tank, and circulation tank.

[0035] Figure 7 This is a schematic diagram of the cross-sectional structure of the mud pit along the axial direction of the side mold.

[0036] Figure 8 This is a bottom view of the mud pit structure (bottom mold omitted).

[0037] Figure 9 This is a schematic diagram of the front view structure of the side mold.

[0038] Figure 10 This is a schematic diagram of the bottom mold structure viewed from below.

[0039] Figure 11 This is a schematic diagram of the mud management system.

[0040] Figure 12 This is a three-dimensional structural diagram of the sand separating device.

[0041] In the diagram, 1 is the first column, 2 is the first horizontal connector, 3 is the second horizontal connector, 4 is the second column, 5 is the circulating tank, 6 is the sedimentation tank, 7 is the pile hole, 8 is the first horizontal beam, 9 is the first longitudinal beam, 10 is the prefabricated panel, 11 is the second mud pump, 12 is the mud chute, 13 is the first mud pump, 14 is the first distribution beam, 15 is the fixed panel, 16 is the second horizontal beam, 17 is the second panel, 18 is the screw pump, 19 is the second longitudinal beam, 20 is the second distribution beam, 21 is the online density meter, 22 is the mixing system, 2201 is the mixer, 2202 is the mixing support beam, 23 is the side formwork, 2301 is the clamp, and 2302 is the side formwork unit body. Side mold reinforcing rib 2303, side mold unit connecting plate 2304, clamp connecting plate 2305, mud hole 2306, slurry stopping mechanism 24, slurry stopping sealing plate 2401, slurry stopping plate 2402, slurry stopping stiffening plate 2403, bottom mold 25, bottom mold body 2501, bottom mold crossbeam 2502, bottom mold reinforcing rib 2503, bottom mold reinforcing rib 2504, third mud pump 26, sand separating device 27, hydrocyclone 2701, primary screen 2702, secondary slag outlet 2703, secondary screen 2704, primary slag outlet 2705, pulping device 28, fourth mud pump 29. Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the invention is used. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] A construction method for an integrated mud circulation construction platform, combining... Figures 1-6 As shown, it includes the following steps:

[0046] S1. Construct the foundation of the first steel platform: Drive steel pipe piles into the water as the first columns 1. Install the first horizontal connectors 2 between the first columns 1, forming a cube shape. Install the first distribution beams 14 horizontally between the tops of the first columns 1, perpendicular to the first columns 1. Install the first longitudinal beams 9 vertically between the tops of the first distribution beams 14, perpendicular to the first distribution beams 14. Install the first transverse beams 8 horizontally between the tops of the first longitudinal beams 9, perpendicular to the first longitudinal beams 9. In this step, the connections between the first columns 1 and the first horizontal connectors 2, the first columns and the first distribution beams 14, the first distribution beams 14 and the first longitudinal beams 9, and the first longitudinal beams 9 and the first distribution beams 14 are made using traditional welding methods, which provide a more stable connection. Of course, bolted connections can also be used in special circumstances.

[0047] S2. Installation of Circulation Tank 5 and Sedimentation Tank 6: Both circulation tank 5 and sedimentation tank 6 are prefabricated mud tanks, placed on the first horizontal connecting beam 2. The height of the prefabricated mud tank body is lower than the first longitudinal beam 9. A mud tank circulation pipe or mud chute 12 is installed between the upper parts of circulation tank 5 and sedimentation tank 6 to connect them. Circulation tank 5 or sedimentation tank 6 is placed on the two first horizontal connecting beams 2 for stable placement, and combined with... Figure 3 The height of the mud pit body is lower than that of the first longitudinal beam 9 to avoid affecting the installation of the first longitudinal beam 9; the first horizontal connector 2 is generally set 1.8-2.5m below the top of the first column 1 to provide sufficient placement space for the installation of the prefabricated mud pit.

[0048] S3. Install the first panel: Install the first panel on top of the first crossbeam 8. The first panel has reserved space for drilling pile construction. The first panel includes a prefabricated panel 10 and a fixed panel 15. The prefabricated panel 10 is installed in the area above the circulating tank 5 and sedimentation tank 6 corresponding to the installation position of the first panel, and the remaining area is occupied by the fixed panel 15. The fixed panel 15 is welded to the first crossbeam 8, and the prefabricated panel 10 is detachably connected to the first crossbeam 8 / first longitudinal beam 9. The prefabricated panel 10 is installed above the circulating tank 5 and sedimentation tank 6, and can be easily removed when necessary to operate and process the circulating tank 5 and / or sedimentation tank 6. If it is necessary to process the borehole and sand in the sedimentation tank 6, the prefabricated panel 10 needs to be hoisted to the outside of the platform to expose the sedimentation tank 6 and extract the mud and drill cuttings in the sedimentation tank. The first crossbeam 8 may not be installed below the position of the prefabricated panel 10, i.e. Figure 5The state shown. To facilitate the removal of the circulation tank 5 or sedimentation tank 6, panel beams can be welded to the underside of the prefabricated panel 10 to improve the support strength of the prefabricated panel 10.

[0049] The components used in the above construction method are as follows: the first column 1 is made of steel pipe, the first distribution beam 14 is made of double-beam I-beams, the first panel is made of patterned steel plate, the first longitudinal beam 9 is made of Bailey bridge panels, and the first transverse beam 8 is made of I-beams. The constructed first steel platform can serve as a working platform for drilling operations and provides space and support for the circulation tank 5 and sedimentation tank 6. The installed circulation tank 5 and sedimentation tank 6, together with the first mud pump 13 and the second mud pump 11, form a mud circulation system. The sedimentation tank 6 is used to settle drill cuttings. The circulation tank 5 is equipped with the first mud pump 13, which pumps mud into the pile hole 7. The top of the circulation tank 5 and the top of the sedimentation tank 6 are connected by a mud chute 12 or a mud circulation pipe. The second mud pump 11 is installed in the pile hole 7. The mud pumped out of the pile hole 7 by the second mud pump 11 is sent into the sedimentation tank 6 through a mud pipe. After the drill cuttings and gravel settle, the mud flows into circulation tank 5 through the mud circulation pipe or mud chute. The mud in circulation tank 5 is pumped out by the first mud pump 13 and then pumped back into the drilling position of the piling rig through the mud pipe to carry away the drill cuttings. In this way, the mud circulation can be completed through the platform's own circulation tank 5 and sedimentation tank 6. The number of circulation tanks 7 and sedimentation tanks 5 can be selected according to the actual mud turnover volume requirements. Since they are not installed on the panel, they are relatively unrestricted by space and can better meet the volume requirements of mud circulation; combined with Figure 4 and Figure 5 As shown, this embodiment is equipped with 4 circulation tanks 5 and 2 sedimentation tanks 6, with each sedimentation tank 6 matched with 2 circulation tanks 5.

[0050] Furthermore, to facilitate the placement of necessary tools and equipment for bored pile construction, this embodiment also includes the installation steps of a second steel platform: steel pipe piles are driven into the water as second columns 4; a second horizontal connector 3 is installed between the second columns 4, forming a cube shape; a second distribution beam 20 is installed longitudinally between the tops of the second columns 4, perpendicular to the second columns 4; a second longitudinal beam 19 is installed transversely between the tops of the second distribution beams 20, perpendicular to the second distribution beams 20; a second horizontal beam 16 is installed longitudinally on the top of the second longitudinal beam 19, perpendicular to the second longitudinal beam 19; and a second panel 17 is installed on the second longitudinal beam 19; the constructed second steel platform has a similar structure to the first steel platform, but is perpendicular to the first steel platform. The second steel platform is located on one side of the first steel platform, typically connected along its length to minimize obstruction of the waterway. The first panel and the second panel 17 are joined together to prevent workers from falling during construction. Traditional welding methods are used for the connections between the second column 4 and the second horizontal connector 3, the second column 4 and the second distribution beam 20, the second distribution beam 20 and the second longitudinal beam 19, the second longitudinal beam 19 and the second horizontal beam 16, and the second horizontal beam 16 and the second panel 17. These connections are more stable. However, bolted connections can be used in special circumstances. The installation of the second steel platform can be performed before step S1, after step S1 / S2 / S3, or simultaneously with step S1 / S2 / S3, depending on the specific circumstances.

[0051] Furthermore, the assembled panel 10 is connected by U-bolts, washers, and nuts. The assembled panel 10 has vertically through-holes. The two ends of the U-bolts pass through these through-holes. Washers are inserted from below into the two ends of the U-bolts and are secured under the first crossbeam 8 or the first longitudinal beam 9. Nuts are screwed into the two ends of the U-bolts to fix the assembled panel 10. In this embodiment, the washers are secured under the first longitudinal beam 9, which is a Bailey bridge. Specifically, the washers are positioned below the upper chord. If the first crossbeam 8 is not located below the assembled panel 10, then the two ends of the U-bolts are secured under the first longitudinal beam 9.

[0052] Furthermore, in combination Figures 7-10As shown, the mud pit includes a bottom mold 25, side molds 23, a mixing system 22, and a mud-stopping mechanism 24. The bottom mold 25 is circular. The side mold 23 includes at least two side mold units, which are horizontally spliced ​​together to form a cylindrical shape. The bottom of the side mold 23 is connected to the bottom mold 25 to form the mud pit body. The mud pit body is placed below the first longitudinal beam 9. The side mold is assembled from side mold units, which can be conveniently transported and stored when not in use. Generally, the side mold units are made to the same size for easy manufacturing. For example, if a side mold 23 is assembled from two side mold units, the cross-section of each side mold unit is a semi-circular arc, and so on. The mixing system 22 includes a mixer 2201 and a mixing support mechanism. The mixing support mechanism is detachably connected to the top of the side mold 23. The upper part of the mixer 2201 is connected to the mixing support mechanism, and the lower part extends into the mud tank body. The mixing support mechanism provides a support foundation for the mixer 2201. With the addition of the mixer 2201, mixing can be carried out in the mud tank body. When it is used as a circulation tank 5, it can reduce the sedimentation of mud in the circulation tank and prevent the mud specific gravity from being too low. The grout-stopping mechanism 24 includes a grout-stopping plate 2402, a grout-stopping sealing plate 2401, and a grout-stopping stiffening plate 2403. The grout-stopping plate 2402 is annular and connected to the bottom mold 25 at its bottom. Its outer diameter matches the inner diameter of the side mold 23. After installation, the grout-stopping plate 2402 is tightly attached to the inner wall of the side mold 23. Multiple triangular grout-stopping stiffening plates 2403 are spaced apart on the inner wall. The bottom of the grout-stopping stiffening plate 2403 is connected to the bottom mold 25, and its inner side is connected to the annular grout-stopping sealing plate 2401. Form 2403 is a right-angled triangle, with one right-angled side connected to the bottom mold 25 and the other right-angled side connected to the grout stop plate 2402. The grout stop sealing plate 2401 covers the space enclosed by the grout stop stiffening plate 2403, the grout stop plate 2402, and the bottom mold 25. Specifically, the grout stop sealing plate 2401 has a truncated cone-shaped side, smaller at the bottom and larger at the top. Its lower edge abuts against the bottom mold, and its upper edge abuts against the grout stop plate 2402. This covers the gaps between the grout stop stiffening plates 2403, preventing sand and gravel from accumulating between them and making cleaning difficult. The grout stop mechanism 24 provides vertical support for the side mold 23 and the grout, while preventing grout leakage from the connection between the side mold 23 and the bottom mold 25. The grout stop plate 2402, the grout stop sealing plate 2401, and the grout stop stiffening plate 2403 are all made of steel plate, and different thicknesses of steel plate can be selected as needed, such as 6mm steel plate.

[0053] Step S2 specifically includes: connecting the bottom mold 25 to the grout-stopping mechanism 24 and placing it on the first horizontal connector 2; connecting the side mold units together with bolts to form the side mold 23; then placing the side mold 23 onto the bottom mold 25 aligned with the grout-stopping plate 2402 and tightening the bolts; then installing the mixing support mechanism on top of the side mold, with the upper end of the mixer 2201 connected to the mixing support mechanism and its lower part extending into the space enclosed by the bottom mold 25 and the side mold 23. A prefabricated mud tank is used as the circulation tank 5 and the sedimentation tank 6. Both the bottom mold and the side mold can be assembled on the bank and then hoisted to the platform for installation, making operation convenient and effectively shortening the construction cycle.

[0054] Furthermore, combining Figure 10 As shown, the bottom mold 25 includes a bottom mold body 2501 and bottom mold reinforcing ribs 2503. The bottom mold body 2501 is circular, with several bottom mold reinforcing ribs 2503 connected at intervals below. The bottom mold body 2501 is the basic structure of the bottom mold 25. The bottom mold reinforcing ribs 2503 are used to enhance the supporting strength of the bottom mold 25. The bottom mold body 2501 can be made of steel plates of different thicknesses, such as 6mm steel plates, depending on the weight requirements of the mud it bears. The bottom mold reinforcing ribs 2503 can be made of channel steel. The bottom mold 25 has higher strength requirements and can be made of 16# channel steel. Bottom mold reinforcing ribs 2504 are also vertically connected at intervals between the bottom mold reinforcing ribs 2503, i.e., combined with... Figure 7 and Figure 10 As shown, the bottom formwork reinforcing ribs 2503 are arranged longitudinally, while the bottom formwork reinforcing bars 2504 are arranged transversely, connecting the bottom formwork reinforcing ribs 2503 to form a whole, thereby better ensuring support strength. Of course, for ease of welding, the bottom formwork reinforcing bars 2504 can be set on the side of the bottom formwork reinforcing ribs 2503 away from the bottom formwork body 2501. The bottom formwork reinforcing bars 2504 can be made of steel bars, such as 12mm threaded steel bars. In addition, a ring-shaped bottom formwork crossbeam 2502 can also be fixed to the lower periphery of the bottom formwork body 2501 to provide overall reinforcement to the periphery of the bottom formwork body 2501.

[0055] Furthermore, combining Figure 9As shown, the side mold unit includes a side mold unit body 2302, a clamp 2301, and side mold reinforcing ribs 2303. The side mold unit body 2302 has an arc-shaped cross-section. Multiple vertically arranged side mold reinforcing ribs 2303 are connected at intervals on the outer wall. Side mold unit connecting plates 2304 are provided on both sides of the outer wall. Preferably, the side mold unit connecting plates 2304 extend from the top to the bottom of the side mold unit body 2302. When the side mold unit bodies 2302 are tightened together, it can better prevent the mud from leaking from the splicing position. The side mold reinforcing ribs 2303 are connected to the outside of the horizontally arranged arc-shaped clamps 2301. The clamps 2301 are also provided at both ends. The side mold unit connecting plates 2304 and clamps 2301 connecting plates of adjacent side mold units are tightened together by side mold 23 connectors to form the side mold 23. Specifically, both the side formwork unit connecting plate 2304 and the clamp connecting plate 2305 are provided with through holes. The side formwork connectors use bolts and nuts. The bolts pass through the through holes of the side formwork unit connecting plate 2304 and the clamp connecting plate 2305 respectively, and then the nuts are screwed in to secure them. This is the connection method used in engineering, which is convenient for installation and disassembly, and will not be elaborated here. The side formwork unit body 2302 can be made of steel plate. Depending on the requirements of the mud it bears, steel plates of different thicknesses can be selected, such as 3mm or 6mm steel plates. The side formwork reinforcing ribs 2303 and the clamps 2301 can be made of channel steel, such as 5# channel steel or 8# channel steel. A mud hole 2306 can be provided on one side of the upper part of the side formwork unit body 2302 to connect to the mud pool circulation pipe or mud chute 12 to realize the mud flow between mud pools. The clamp connecting plate 2305 typically abuts against the outer side of the side mold unit connecting plate 2304. Both the side mold unit connecting plate 2304 and the clamp connecting plate 2305 are positioned at the edges of both sides of the side mold unit body 2302 to ensure a better connection. For the connection between the bottom mold 25 and the side mold 23, commonly used bolts can be employed. Bolt holes are provided around the perimeter of the bottom mold body 2501, and bolt holes are also provided at the bottom of the side mold 23. The bolt holes in the bottom mold body 2501 are through holes, while the bolt holes in the side mold 23 are blind holes. Bolts pass through the bolt holes in the bottom mold body 2501 and are screwed into the bolt holes in the side mold 23, thus fixing the bottom mold 25 and the side mold 23 together. The location of the bolt holes in the side mold 23 refers to the side mold unit body 2302, which is the basic structure of the side mold 23; this is easily understood by those skilled in the art. To separate the bottom mold 25 and the side mold 23, simply unscrew the bolts.

[0056] In addition, for the mixing support mechanism, combined with Figure 8As shown, this embodiment also provides a specific, easy-to-install structure. The stirring support mechanism includes two stirring support beams 2202. Both ends of the stirring support beams 2202 are connected to the top of the side mold 23. The space between the two stirring support beams 2202 accommodates the stirring shaft of the mixer 2201. The motor of the mixer 2201 can be mounted on the two stirring support beams 2202, and the two stirring support beams 2202 can be installed on the top of the side mold 23 with bolts, which is convenient and quick. The stirring support beams 2202 can be made of channel steel, such as #10 or #12 channel steel.

[0057] Furthermore, the installation steps of the mud management system are also included: The mud management system is placed on the first steel platform and includes a mud preparation device 28, a third mud pump 26, a mud inlet pipe, a first mud delivery pipe, a sand separating device 27, a second mud delivery pipe, and an online density meter 21. Specifically: the first mud delivery pipe, whose inlet is connected to the outlet of the mud preparation device 28, is used to transport the mud prepared by the mud preparation device 28; the third mud pump 26 is used to extract mud from the sedimentation tank 6; and the mud inlet pipe is used to introduce mud containing drill cuttings extracted from the sedimentation tank 6 or from the pile hole 7 into the sand separating device 27. In step 7, if mud containing drill cuttings is extracted from sedimentation tank 6, the third mud pump 26 is started for extraction. If mud containing drill cuttings is extracted directly from pile hole 7, the second mud pump 11 at the pile opening is used for extraction. A tee can be installed at the inlet of the slurry inlet pipe, with a valve installed at each of the two inlets. One valve is connected to the pipe from pile hole 7, and the other valve is connected to the pipe from sedimentation tank 6. An online density meter 21 is installed on the slurry inlet pipe to measure the density of the mud entering the sand separating device 27. In this embodiment, a vibration meter is used. An online density meter is used. If the online density meter 21 tests the mud density and it is qualified, it indicates that the previous conditioning treatment of the mud has been qualified. The sand separating device 27 is connected to the outlet of the mud inlet pipe and is used to perform preliminary screening of the mud containing drill cuttings introduced by the mud inlet pipe, separating mud and sand from mud and slurry. That is, it is drawn from the sedimentation tank 6 or the pile hole 7 to the inlet of the sand separating device 27, where the sand separating device 27 separates the mud and sand from the mud and slurry. The inlet of the second mud delivery pipe is connected to the mud outlet of the sand separating device 27, and the outlet extends into the circulation tank 5. It is also equipped with a mud adjustment hole and the first mud delivery pipe. The outlet connection is provided; the mud density entering the sand separating device 27 is monitored in real time by an online density meter 21. When the mud density is low or high, high-density or low-density mud can be prepared by the mud preparation device 28. The mud prepared by the mud preparation device 28 enters the second mud delivery pipe through the mud adjustment hole and mixes with the mud delivered from the sand separating device 27 to adjust the mud density entering the circulation pool 5. In addition, if mud needs to be replenished during drilling to maintain the mud level in the pile hole 7, normal density mud prepared by the mud preparation device 28 can also be introduced. By setting up the online density meter 21, the circulating mud density can be understood in a timely manner, thereby helping to stabilize and control the circulating mud density. In addition, a pile hole mud monitoring online density meter can also be set in the pipe for introducing mud into the pile hole 7 from the circulation pool 5 to monitor the mud density in the circulation pool 5. By controlling the mud density, the wall protection effect can be enhanced, the drilling efficiency can be improved, the hole cleaning time after drilling can be greatly shortened, and the construction quality and progress can be guaranteed. The pulping device 28 and the sand separating device 27 are both mounted on a platform base, which facilitates overall hoisting and centralized processing.

[0058] The bottom of the pulping device 28 is connected to the first slurry delivery pipe via a screw pump 18, that is, the outlet of the discharge bucket is connected to the screw pump 18, and the slurry is pumped into the first slurry delivery pipe through the screw pump 18.

[0059] This embodiment also provides a specific structure for the sand separating device 27, combined with... Figure 12 As shown, the sand separating device 27 includes a hydrocyclone 2701, a primary screen 2702, and a secondary screen 2704, combined with... Figure 3 A partial cross-sectional view shows that the hydrocyclone 2701 has a primary screen 2702 and a secondary screen 2704 spaced apart at its lower part. The aperture of the primary screen 2702 is larger than that of the secondary screen 2704. The hydrocyclone 2701 is used for sand separation. The slurry flows out from the upper overflow port, while the sand-containing sludge flows out from the bottom outlet. The slurry from the upper overflow port enters the sand separating device 27. The sand flowing out from the bottom outlet is filtered through the two screens, separating coarse and fine sand. The coarse sand is discharged from the primary screen 2702 side, and the fine sand is discharged from the secondary screen 2704 side. This separates the sludge into coarse sand and mud, which are then processed accordingly. To facilitate thorough screening of the slurry and sand, a vibrating motor is installed on the primary screen 2702 and / or the secondary screen 2704. The vibration of the motor helps to better filter the sludge and achieve rapid separation of coarse sand and mud. In addition, for ease of operation, the primary screen 2702 and the secondary screen 2704 will be fixed together by a single fixing mechanism, such as... Figure 11 As shown, a cylindrical body is connected below the hydrocyclone 2701. A primary screen 2702 and a secondary screen 2704 are fixedly installed at intervals within the cylindrical body. On the side wall of the cylindrical body, a primary slag outlet 2705 is provided on one side of the primary screen 2702. The primary slag outlet 2705 is inclined upwards along the slag discharge direction, which prolongs the vibrating screening time of the sludge on the primary screen 2702 and reduces the moisture content of the coarse sand. Similarly, a secondary slag outlet 2703 is also provided on one side of the secondary screen 2704, inclined upwards along the slag discharge direction.

[0060] A fourth mud pump 29 is installed at the mud outlet of the sand separating device 27. The outlet of the fourth mud pump 29 is connected to the inlet of the second mud delivery pipe as the mud outlet of the sand separating device 27. The fourth mud pump 29 pumps the mud that has been separated from the drill cuttings into the second mud delivery pipe, and mixes it with the mud prepared by the mud preparation device 28 to achieve mud conditioning treatment.

[0061] Furthermore, it also includes a controller, which is connected to the dosing device 28, the online density meter 211 and the pulping device 28 respectively, and is also connected to the fourth mud pump 29 matched with the sand separating device 27 and the screw pump 18 matched with the pulping device 28. When the online density meter 21 feeds back the detected mud density to the controller, the controller determines whether the mud density is low or high and sends a command to the mud preparation device 28. The mud preparation device 28 prepares high-density or low-density mud. After preparation, it feeds back to the controller, which then starts the screw pump 18 to send the mud prepared by the mud preparation device 28 from the mud adjustment hole into the second mud delivery pipe. This mud mixes with the mud delivered from the sand separating device 27, adjusting the mud density entering the pile hole 7. Additionally, if mud needs to be replenished during drilling to maintain the mud level in the pile hole 7, the controller sends a command to the mud preparation device 28. The mud preparation device 28 prepares normal-density mud, and after preparation, it feeds back to the controller. The controller then starts the screw pump 18 to send the mud prepared by the mud preparation device 28 from the mud adjustment hole into the second mud delivery pipe. The controller ensures stable control of the circulating mud density, enhances the wall protection effect, improves drilling efficiency, significantly shortens the post-drilling cleaning time, and guarantees construction quality and progress.

[0062] The above construction method for the integrated mud circulation construction platform involves installing a first steel platform as the working platform for drilling operations and as the bearing platform for circulation tank 5 and sedimentation tank 6. The circulation tank 5 and sedimentation tank 6 are installed on the first horizontal connecting section 2, which makes full use of the lower space under the panel. Additionally, a second steel platform is installed as a rebar cage hoisting area, used to place the rebar cage, crane, and pile driver, ensuring the construction platform meets the essential mud circulation requirements for drilling operations.

[0063] When using the working platform of this embodiment for pile foundation construction, the second mud pump 11 in the pile hole 7 draws in the mud and drill cuttings generated during the pile foundation drilling process, and transports them to the sedimentation tank 6 through the mud pipe for the sedimentation of the drill cuttings. At this time, the agitator 2201 of the sedimentation tank 6 is in the off state. After sedimentation, the upper layer of mud in the sedimentation tank 6 flows directly to the circulation tank 5 through the mud chute 12. The agitator 2201 of the circulation tank 5 is in the on state, so that the mud forms a vortex, reducing the sedimentation of the mud in the circulation tank 5. Then, the first mud pump 13 of the circulation tank 5 transports the mud of the circulation tank 5 to the drilling position of the pile driver to carry the drill cuttings. When the drilling cuttings in the sedimentation tank 6 reach half, the prefabricated panel 10 is unfixed to the first crossbeam 8 or the first longitudinal beam 9, and is lifted by a crane to the outside of the platform to expose the sedimentation tank. The mixer 2201 in the sedimentation tank 6 is turned on to break up the settled drilling cuttings. The mud management system is started to extract the mud and drilling cuttings from the sedimentation tank 6, and the drilling cuttings are separated by the sand separating device 27. The separated drilling cuttings are transported by agricultural vehicles to the sand and gravel plant as raw materials for sand and gravel. If the parameters of the mud do not meet the construction requirements during the mud circulation process, the mud management system is used to extract mud from the pile hole 7 or the sedimentation tank 6 for mud deslagging and mud mixing agent conditioning treatment. After the mud meets the construction requirements, it is discharged to the circulation tank 5 through the second mud delivery pipe to improve the mud specific gravity during construction.

[0064] After the pile foundation is drilled into place, when cleaning the hole, the mud at the pile opening can be directly sucked through the mud management system for mud circulation to remove slag, and then transported to the bottom of the hole through the second slurry delivery pipe for reverse slag removal to speed up the cleaning efficiency.

Claims

1. A construction method for an integrated mud circulation construction platform, characterized in that... Includes the following steps: S1. Construct the foundation of the first steel platform: drive steel pipe piles into the water as the first columns, install the first horizontal connectors between the first columns, and form a cube with the first columns and the first horizontal connectors; install the first distribution beams horizontally between the tops of the first columns, and the first distribution beams are perpendicular to the first columns; install the first longitudinal beams vertically between the tops of the first distribution beams, and the first longitudinal beams are perpendicular to the first distribution beams; install the first transverse beams horizontally on the tops of the first longitudinal beams, and the first transverse beams are perpendicular to the first longitudinal beams. The first longitudinal beams are made of Bailey panels. S2. Install the circulation tank and sedimentation tank: Both the circulation tank and the sedimentation tank are prefabricated mud tanks, placed on the first horizontal connecting beam. The height of the mud tank body in the prefabricated mud tank is lower than the first longitudinal beam. A mud tank circulation pipe or mud chute is installed between the upper parts of the circulation tank and the sedimentation tank to connect them. S3. Install the first panel: Install the first panel on the top of the first crossbeam. The first panel is reserved with space for drilling pile construction. The first panel includes a prefabricated panel and a fixed panel. The area above the circulation tank and the sedimentation tank corresponding to the area where the first panel is installed is set as a prefabricated panel, and the remaining area is a fixed panel. The fixed panel is welded to the first crossbeam, and the prefabricated panel is detachably connected to the first crossbeam / first longitudinal beam. The system also includes the installation steps of a mud management system: the mud management system is placed on a first steel platform and includes a mud preparation device, a third mud pump, a mud inlet pipe, a first mud delivery pipe, a sand separating device, a second mud delivery pipe, and an online density meter, wherein: the inlet of the first mud delivery pipe is connected to the outlet of the mud preparation device; the third mud pump is used to extract mud from the sedimentation tank; the mud inlet pipe is used to introduce mud containing drill cuttings extracted from the sedimentation tank or from the pile hole into the sand separating device; the online density meter is installed on the mud inlet pipe; the sand separating device is connected to the outlet of the mud inlet pipe and is used to perform preliminary screening of the mud containing drill cuttings introduced from the mud inlet pipe to separate mud and sand from mud; the inlet of the second mud delivery pipe is connected to the mud outlet of the sand separating device, the outlet extends into the circulation tank, and a mud regulating hole is provided that connects to the outlet of the first mud delivery pipe; the mud preparation device and the sand separating device are both mounted on a platform base.

2. The construction method according to claim 1, characterized in that: The process also includes the installation steps of a second steel platform: driving steel pipe piles into the water as second columns; installing a second horizontal connector between the second columns, with the second columns and the second horizontal connector forming a cube; installing a second distribution beam longitudinally between the tops of the second columns, the second distribution beam being perpendicular to the second columns; installing a second longitudinal beam transversely between the tops of the second distribution beams, the second longitudinal beam being perpendicular to the second distribution beams; installing a second horizontal beam longitudinally on top of the second longitudinal beam, the second horizontal beam being perpendicular to the second longitudinal beam; and installing a second panel on the second longitudinal beam, the second longitudinal beam being made of Bailey panels. The second steel platform is set on one side of the first steel platform, and the first panel and the second panel are spliced ​​together; The installation of the second steel platform may be performed before step S1, after step S1 / step S2 / step S3, or simultaneously with step S1 / step S2 / step S3.

3. The construction method according to claim 1, characterized in that: The assembled panel is connected by U-bolts, washers and nuts. The assembled panel has a through hole in the vertical direction. The two ends of the U-bolt pass through the through hole of the assembled panel. The washers are inserted from below into the two ends of the U-bolt and are stuck under the first crossbeam / first longitudinal beam. The nuts are screwed into the two ends of the U-bolt to fix the assembled panel.

4. The construction method according to claim 1, characterized in that: The prefabricated mud pit includes a bottom mold, side molds, a mixing system, and a slurry-stopping mechanism, wherein: the bottom mold is circular; the side mold includes at least two side mold units, which are horizontally spliced ​​together to form a cylindrical shape, and the bottom is connected to the bottom mold to form the mud pit body; the mixing system includes a mixer and a mixing support mechanism; the slurry-stopping mechanism includes a slurry-stopping plate, a slurry-stopping sealing plate, and a slurry-stopping stiffening plate. The slurry-stopping plate is annular, connected to the bottom mold at the bottom, and its outer diameter matches the inner diameter of the side mold. Multiple triangular slurry-stopping stiffening plates are spaced apart on the inner wall. The bottom of the slurry-stopping stiffening plate is connected to the bottom mold, and its inner side is connected to the annular slurry-stopping sealing plate. The slurry-stopping sealing plate covers the space enclosed by the slurry-stopping stiffening plate, the slurry-stopping plate, and the bottom mold. Step S2 specifically includes: connecting the bottom mold to the slurry-stopping mechanism and placing it on the first horizontal connection; connecting the side mold units together with bolts to form a side mold; then placing the side mold on the bottom mold in accordance with the slurry-stopping plate and tightening the bolts; then installing the mixing support mechanism on the top of the side mold, connecting the upper end of the mixer to the mixing support mechanism, and extending the lower part into the space enclosed by the bottom mold and the side mold.

5. The construction method according to claim 4, characterized in that: The bottom mold includes a bottom mold body and bottom mold reinforcing ribs. The bottom mold body is circular, and several bottom mold reinforcing ribs are connected at intervals on the bottom. Bottom mold reinforcing ribs are also connected vertically at intervals between the bottom mold reinforcing ribs. The side mold unit includes a side mold unit body, a clamp, and side mold reinforcing ribs. The side mold unit body has an arc-shaped transverse cross-section, and multiple vertically arranged side mold reinforcing ribs are connected at intervals on the outer wall. Side mold unit connecting plates are provided on both sides of the outer wall. A transversely arranged arc-shaped clamp is connected to the outer side of the side mold reinforcing rib, and clamp connecting plates are also provided at both ends of the clamp. The side mold unit connecting plates and clamp connecting plates of adjacent side mold units are fastened together by side mold connectors to form the side mold.

6. The construction method according to claim 1, characterized in that: The sand separating device includes a hydrocyclone, a primary screen, and a secondary screen. The primary and secondary screens are spaced apart at the bottom of the hydrocyclone, with the aperture of the primary screen being larger than that of the secondary screen. A vibrating motor is installed on the primary screen and / or the secondary screen. A primary slag outlet is provided on one side of the primary screen, and the primary slag outlet is inclined upward along the slag discharge direction. A secondary slag outlet is provided on one side of the secondary screen, and the secondary slag outlet is inclined upward along the slag discharge direction.

7. The construction method according to claim 1, characterized in that: It also includes a controller, which is connected to the online density meter, the sand separating device and the pulping device respectively.

Images