Operation system for constructing preformed hole stiffening core composite pile

Abstract

The utility model relates to an operation system for constructing a preformed hole stiffening core composite pile. The operation system comprises drilling equipment, a circulating slurry pump, a slurry conveying pipe, a crane and at least two circulating pools. The drilling equipment is used for drilling preformed holes, the circulating slurry pump can rotate forwards and reversely, and the circulating slurry pump communicates with a drill rod of the drilling equipment; the at least two circulating pools are sequentially communicated, the first circulating pool in the at least two circulating pools is a head-end circulating pool, and the last circulating pool is a tail-end circulating pool; the first end of the slurry conveying pipe is connected with the circulating slurry pump, the second end of the slurry conveying pipe can be communicated with any one of the at least two circulating pools, and a discharging opening is formed in the head-end circulating pool and used for being communicated with a preformed hole; the crane is used for hoisting the prefabricated core pile. The operation system has the advantages that waste mud and muck generated in the hole forming process of preformed holes can be effectively recycled, and the operation system can be suitable for preformed hole stiffening core composite pile construction in soft soil areas and areas with thick and hard clay layers or rock stratums at the same time.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation engineering, and in particular to an operating system for constructing pre-drilled core composite piles. Background Technology

[0002] In recent years, with the booming development of the construction industry and the continuous improvement of engineering quality requirements, various new types of composite pile foundations have emerged to solve existing foundation construction problems. These new composite pile foundations are mainly implemented through two common construction methods. First, a cement mixing pile machine is used to perform in-situ mixing, ensuring that cement and soil are fully mixed to form cement-soil. Precast core piles are then driven into the cement-soil mixture before it has initially set, thereby enhancing the bearing capacity of the pile foundation. Second, a long spiral drilling rig, screw drilling rig, or rotary drilling rig is used to create a hole. After drilling, additional concrete or other grouting materials are filled in, and then precast core piles are implanted to construct the composite pile foundation.

[0003] However, these existing new composite pile foundation construction technologies still have many limitations. Cement-soil mixing piles, for example, have a relatively narrow range of applications, generally only suitable for soft soil areas. When facing areas with thick, hard clay or rock layers, the cement-soil mixing piles struggle to effectively break up and mix these hard soil masses during construction, making implementation difficult.

[0004] In the post-mixing pile planting process, besides using mixing pile equipment, the post-planting stage typically requires the implantation of precast core piles through methods such as static pressure, hammering, or vibration. However, these methods are less effective in hard strata, not only increasing construction difficulty but also easily damaging the pile body. Furthermore, the equipment used in this process occupies a large area, often failing to meet construction requirements in projects with limited space or low clearance, thus restricting its application scenarios.

[0005] Current methods for constructing pre-drilled composite piles primarily rely on long auger drilling rigs, screw drilling rigs, or rotary drilling rigs to complete the drilling operation. However, these types of equipment are extremely unsuitable for low-clearance sites due to limitations in equipment height and operating space, severely impacting construction progress and quality. Furthermore, the use of additional mixed grouting materials during composite pile formation generates substantial amounts of waste mud and slag during drilling. These wastes cannot be effectively recycled and must be simply treated on-site before being transported off-site for disposal. However, this treatment process not only generates large amounts of wastewater and dust, causing serious pollution to the surrounding environment, but also incurs high costs, increasing the overall project cost.

[0006] In summary, existing new composite pile foundation construction technologies have significant shortcomings in terms of applicable soil layers, construction site adaptability, environmental protection, and cost control. An innovative technical solution is urgently needed to address these issues and promote the further development of building foundation construction technology. Utility Model Content

[0007] Based on this, the purpose of this utility model is to provide an operating system for constructing pre-drilled core composite piles that can effectively recycle and utilize the waste mud and slag generated during the pre-drilling process, and is applicable to both soft soil areas and areas with thick, hard clay or rock strata.

[0008] A working system for constructing precast cored composite piles includes drilling equipment, a circulating mud pump, a grout delivery pipe, a crane, and at least two circulation pools. The drilling equipment is used to drill precast holes. The circulating mud pump is capable of forward and reverse rotation and is connected to the drill rod of the drilling equipment. The at least two circulation pools are sequentially connected, with the first circulation pool being the initial circulation pool and the last circulation pool being the final circulation pool. The first end of the grout delivery pipe is connected to the circulating mud pump, and the second end of the grout delivery pipe can be connected to any one of the at least two circulation pools. The initial circulation pool is provided with a discharge port for connecting to the precast hole. The crane is used to lift the precast cored piles.

[0009] In one embodiment, when the circulating mud pump rotates forward, the drilling mud and slag formed during the drilling process are discharged from the pre-drilled hole to the first-end circulating pool, which is a sedimentation pool, and the other circulating pools are mud pools; when the circulating mud pump rotates in reverse, the drilling mud and slag formed during the drilling process are discharged from the drill rod of the drilling equipment through the circulating mud pump and the slurry delivery pipe to the last-end circulating pool, which is a sedimentation pool, and the other circulating pools are mud pools.

[0010] In one embodiment, the operating system further includes a mixing and slurry preparation device and an additional mud pump. The mixing and slurry preparation device is used to mix and prepare fluidized solidified soil. The mixing and slurry preparation device is provided with a first feed port and a second feed port. The second end of the slurry delivery pipe is detachably connected to the first feed port of the mixing and slurry preparation device. The second feed port of the mixing and slurry preparation device can pump drilling mud from any mud pool in the at least two circulation pools through the additional mud pump.

[0011] In one embodiment, the operating system further includes a mixing tank and a mixer. The mixing tank is used to hold the drilling mud from any of the at least two circulating tanks, the slag from the sedimentation tank, and other materials for preparing fluidized solidified soil. The mixer is used to mix the materials for preparing fluidized solidified soil contained in the mixing tank.

[0012] In one embodiment, the working system further includes a protective sleeve for placement at the opening of the pre-drilled hole.

[0013] In one embodiment, the casing is provided with a discharge port, which is connected to the discharge port of the first-end circulation pool.

[0014] In one embodiment, the operating system further includes a hydrometer and a flow meter, the hydrometer being used to determine the specific gravity of the drilling mud or fluidized solidified soil, and the flow meter being used to determine the flow rate of the drilling mud flowing through the slurry delivery pipe.

[0015] In one embodiment, the working system further includes a fixer for mounting at the opening of the pre-drilled hole to secure the end of the precast core pile.

[0016] In one embodiment, the operating system for constructing pre-drilled cored composite piles is characterized in that the drilling equipment is a rotary drilling rig or an impact drilling rig.

[0017] In one embodiment, the operating system further includes a sand content measurement test component for determining the sand content of the drilling mud.

[0018] The operating system for constructing pre-drilled cored composite piles described in this utility model has the following advantages over the prior art:

[0019] 1. The drilling mud generated during the pre-drilling process can protect the borehole wall and prevent collapse, resulting in high-quality borehole formation: During the pre-drilling process, the drilling mud and excavated soil generated by the drilling equipment are circulated by the circulating mud pump. The drilling mud circulates through the drill rod, circulating mud pump, mud delivery pipe, all circulation pools, and the pre-drilled hole. The drilling mud continuously circulates throughout the drilling process, while the excavated soil settles in either the initial or final circulation pool, depending on whether the circulating mud pump rotates forward or backward, i.e., whether the entire circulation is forward or reverse. Circulation stops once the pre-drilled hole reaches the designed depth. In this way, the drilling mud, through continuous circulation, maintains a uniform quality, protecting the borehole wall, preventing collapse, and ensuring high-quality borehole formation.

[0020] 2. The drilling mud and excavated soil generated during drilling are effectively recycled on-site, reducing treatment costs, minimizing environmental pollution, and lowering the material cost of pre-drilled core composite piles. Under the action of a circulating mud pump, the drilling mud continuously carries away the excavated soil, which settles directly in either the initial or final circulation pool, depending on whether the pump rotates forward or backward. The drilling mud then overflows and separates into other circulation pools. After drilling is completed, a solidifying agent, settled excavated soil, and sand are added to the drilling mud and mixed to prepare a fluidized solidified soil. The specific proportions depend on the desired structural strength after solidification. In this way, the drilling mud and excavated soil generated during pre-drilling can be effectively recycled on-site, reducing the treatment costs of excavated soil and mud. The fluidized solidified soil formed from the recycled drilling mud and excavated soil becomes the pile material for pre-drilled core composite piles, thus reducing the cost of pile materials.

[0021] 3. Applicable to both soft soil areas and areas with thick, hard clay or rock layers for precast core composite pile foundation construction: By drilling precast holes using drilling equipment and the wall-protecting effect of drilling mud, precast holes meeting the design depth for composite piles can be easily drilled in soft soil areas and areas with thick, hard clay or rock layers. Then, under the action of a circulating mud pump, a fluidized solidified soil mixture made of drilling mud, settled slag, solidifying agent, sand, and gravel is pumped into the precast hole. Due to the high density of the fluidized solidified soil, as it sinks, the drilling mud in the precast hole rises and is discharged, gradually displacing the drilling mud from the precast hole. After the fluidized solidified soil fills the precast hole, the drilling equipment is removed, and a crane is used to lift the precast core pile. Under its own weight, the precast core pile gradually sinks and inserts into the fluidized solidified soil until it reaches the bottom of the precast hole. Unlike mixing piles which require static pressure, hammering, or vibration to implant precast core piles, this method is simple and convenient to construct and will not damage the pile body. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a working system for constructing pre-drilled core composite piles, as described in an embodiment of this utility model.

[0023] Figure 2 This is another structural schematic diagram of the working system for constructing pre-drilled core composite piles as described in the embodiments of this utility model;

[0024] Figure 3 This is a schematic diagram of the working system for constructing pre-drilled core composite piles as described in this utility model embodiment during the hoisting of precast core piles;

[0025] Figure 4This is a schematic diagram of the working system for constructing pre-drilled core composite piles as described in the embodiments of this utility model after the construction of the pre-drilled core composite piles is completed.

[0026] 100. Drilling equipment; 110. Circulating mud pump; 120. Drill rod; 200. Grouting pipe; 300. Crane; 400. Circulating tank; 410. Discharge port; 420. First-end circulating tank; 430. Tail-end circulating tank; 500. Mixing tank; 600. Agitator; 700. Mixing and slurry preparation device; 710. First feed port; 720. Second feed port; 800. Auxiliary mud pump; 900. Casing; 910. Discharge port; 1000. Fixing device; 10. Pre-drilled hole; 20. Precast core pile. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0028] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediary component present. Conversely, when a component is said to be "directly on" another component, there is no intermediary component.

[0029] Reference Figures 1 to 3 An operating system for constructing precast cored composite piles includes a drilling device 100, a circulating mud pump 110, a grout delivery pipe 200, a crane 300, and at least two circulation pools 400. The drilling device 100 is used to drill precast holes 10. The circulating mud pump 110 can rotate forward and backward and is connected to the drill rod 120 of the drilling device 100. The at least two circulation pools 400 are sequentially connected, with the first circulation pool being the first-end circulation pool 420 and the last circulation pool being the last-end circulation pool 430. The first end of the grout delivery pipe 200 is connected to the circulating mud pump 110, and the second end of the grout delivery pipe 200 can be connected to any one of the at least two circulation pools 400. The first-end circulation pool 420 is provided with a discharge port 410 for connecting to the precast holes 10. The crane 300 is used to lift the precast cored piles 20.

[0030] The above-described operating system for constructing pre-drilled core composite piles has the following advantages:

[0031] 1. The drilling mud generated during the drilling of the pre-drilled hole 10 can protect the hole wall and prevent collapse, resulting in high-quality borehole formation: During the drilling process of the drilling equipment 100, the drilling mud and excavated soil generated are circulated by the circulating mud pump 110. The drilling mud circulates through the drill rod 120, the circulating mud pump 110, the mud delivery pipe 200, all circulation pools 400, and the pre-drilled hole 10. The drilling mud generated during the entire drilling process will continue to circulate, while the excavated soil will settle in the first-end circulation pool 420 or the last-end circulation pool 430, depending on whether the circulating mud pump 110 rotates forward or backward, i.e., whether the entire circulation is forward or reverse. Finally, circulation stops after the pre-drilled hole 10 is drilled to the designed depth. In this way, the drilling mud, through continuous circulation, has a uniform quality and can protect the hole wall of the pre-drilled hole 10, preventing collapse and ensuring the quality of the borehole formation.

[0032] 2. The drilling mud and excavated soil generated during drilling are effectively recycled on-site, which reduces treatment costs, minimizes pollution to the surrounding environment, and lowers the material costs for pre-drilled core composite piles. Under the action of the circulating mud pump 110, the drilling mud continuously carries away the excavated soil, which settles directly in the first-end circulation pool 420 or the last-end circulation pool 430, depending on whether the circulating mud pump 110 rotates forward or backward. The drilling mud then overflows and separates into other circulation pools. After drilling is completed, a solidifying agent, settled excavated soil, sand, and gravel are added to the drilling mud and mixed to prepare a fluidized solidified soil. The specific addition ratio depends on the design structural strength to be achieved after the fluidized solidified soil is solidified. In this way, the drilling mud and slag generated during the pre-drilling process can be effectively recycled on-site, thereby reducing the treatment cost of slag and mud. The fluidized solidified soil formed by recycling the drilling mud and slag will become the pile material for pre-drilled core composite piles, thereby reducing the cost of pile materials.

[0033] 3. Applicable to both soft soil areas and areas with thick, hard clay or rock layers for pre-drilled core composite pile foundation construction: By drilling pre-drilled holes 10 using drilling equipment 100 and the wall protection effect of drilling mud on pre-drilled holes 10, pre-drilled holes 10 with a depth sufficient for composite pile design can be easily drilled in soft soil areas and areas with thick, hard clay or rock layers. Then, under the action of circulating mud pump 110, fluidized solidified soil prepared by drilling mud, settled slag, solidifying agent, sand and gravel is pumped into pre-drilled holes 10. Due to the high density of fluidized solidified soil, as the fluidized solidified soil sinks, the drilling mud in pre-drilled holes 10 floats up and is discharged from pre-drilled holes 10, gradually replacing the drilling mud in pre-drilled holes 10. After the fluidized solidified soil fills the pre-drilled hole 10, the drilling equipment 100 is removed, and a crane 300 is used to lift the precast core pile 20. Under the action of its own weight, the precast core pile 20 is gradually lowered and inserted into the fluidized solidified soil until it reaches the bottom of the pre-drilled hole 10. Unlike mixing piles, there is no need to use static pressure, hammering, or vibration methods to implant the precast core pile 20. The construction is simple and convenient, and it will not damage the pile body.

[0034] The illustrations in this embodiment use two circulation tanks for explanation: a head circulation tank 420 and a tail circulation tank 430, which correspond to a sedimentation tank and a sludge tank, respectively. Of course, three or more circulation tanks can be used. For example, with three tanks, one is a sedimentation tank and the other two are sludge tanks.

[0035] Preferably, the circulating mud pump 110 can be integrated with the drilling equipment 100 or added separately. The circulating tank 400 used can be a ready-made, portable tank product or a tank excavated on-site as needed.

[0036] Reference Figure 1When the circulating mud pump 110 rotates forward, the drilling mud and excavated soil generated during the drilling of the pre-drilled hole 10 by the drilling equipment 100 are discharged from the pre-drilled hole 10 to the first-end circulating pool 420. The first-end circulating pool 420 is a sedimentation pool, and the circulating pools other than the first-end circulating pool 420 are mud pools. When the circulating mud pump 110 rotates in reverse, the drilling mud and excavated soil generated during the drilling of the pre-drilled hole 10 by the drilling equipment 100 are discharged from the drill rod 120 of the drilling equipment 100 through the circulating mud pump 110 and the mud delivery pipe 200 to the last-end circulating pool 430. The last-end circulating pool 430 is a sedimentation pool, and the circulating pools other than the last-end circulating pool 430 are mud pools. As a preferred method, the first-end circulating pool 420 is closer to the pre-drilled hole 10. When the circulating mud pump 110 rotates forward, the drilling mud and slag formed during drilling are discharged from the pre-drilled hole 10 to the first-end circulation pool 420. The slag settles in the first-end circulation pool 420, and the drilling mud overflows to other circulation pools until the last-end circulation pool 430. The first-end circulation pool 420 is a sedimentation pool, while the other circulation pools and the last-end circulation pool 430 are mud pools. Under the action of the circulating mud pump 110, the drilling mud is pumped from the last-end circulation pool 430 through the slurry delivery pipe 200 and the drill rod 120 of the drilling equipment 100 back into the pre-drilled hole 10, and then discharged to the first-end circulation pool 420 again with the slag formed during continuous drilling, thus forming a positive circulation. When the circulating mud pump 110 reverses, the drilling mud and cuttings formed during drilling are discharged from the drill rod 120 of the drilling equipment 100 through the circulating mud pump 110 and the slurry delivery pipe 200 to the tail end circulation pool 430. The cuttings settle in the tail end circulation pool 430, and the drilling mud overflows to other circulation pools and re-enters the pre-drilled hole 10 through the head end circulation pool 420. Then, it carries the cuttings formed during continuous drilling through the drill rod 120 of the drilling equipment 100 to the tail end circulation pool 430, thus forming a reverse circulation. Whether to use forward or reverse circulation depends on the actual construction conditions. For example, when drilling in sand or silt layers, the cuttings removal speed of reverse circulation is faster, which can easily cause hole collapse, so forward circulation is preferable. When drilling in harder strata, reverse circulation has a higher drilling speed and better efficiency.

[0037] Better, refer to Figure 2The operating system for constructing pre-drilled cored composite piles also includes a mixing and slurry preparation device 700 and an auxiliary mud pump 800. The mixing and slurry preparation device 700 is used to mix and prepare fluidized solidified soil. The mixing and slurry preparation device 700 is provided with a first feed port 710 and a second feed port 720. The second end of the slurry delivery pipe 200 is detachably connected to the first feed port 710 of the mixing and slurry preparation device 700. The second feed port 720 of the mixing and slurry preparation device 700 can pump drilling mud from any mud pool in at least two circulation pools 400 through the auxiliary mud pump 800. The mixing and slurry preparation device 700 and the auxiliary mud pump 800 can be connected to the circulation system during the drilling of the pre-drilled hole 10, but it is better to connect them after the drilling of the pre-drilled hole 10 is completed. Taking positive circulation as an example, after the pre-drilled hole 10 is completed, the second end of the grouting pipe 200 is connected to the first feed port 710 of the mixing and slurry preparation device 700. The second feed port 720 of the mixing and slurry preparation device 700 is connected to any mud pool in at least two circulation pools 400 through the auxiliary mud pump 800. By starting the auxiliary mud pump 800, the drilling mud in the mud pool is pumped into the mixing and slurry preparation device 700. The specific mud pool connected depends on the specific gravity of the drilling mud in each mud pool and the design strength of the solidified fluidized soil. Alternatively, drilling mud from different mud pools can be pumped into the mixing and slurry preparation device 700 for mixing and use. Then, the auxiliary mud pump 800 is stopped, and slag, solidifying agent, etc. are added to the mixing and slurry preparation device 700 as needed. In addition, if the specific gravity of the drilling mud is insufficient, sand and gravel can be poured into the mixing and slurry preparation device 700. The mixing and slurry preparation device 700 thoroughly mixes the soil to form a fluidized solidified soil. Once complete, the circulating mud pump 110 is activated to pump the fluidized solidified soil from the mixing and slurry preparation device 700 through the first feed port 710, the slurry delivery pipe 200, and the drill rod 120 of the drilling equipment 100 into the pre-drilled hole 10. The addition of the mixing and slurry preparation device 700 and the auxiliary mud pump 800 ensures more uniform mixing of the fluidized solidified soil, resulting in better structural quality and strength after solidification, and making the operation more efficient and labor-saving.

[0038] Reference Figure 1 Alternatively, a simpler method can be used to prepare the fluidized solidified soil. Specifically, the working system used for constructing pre-drilled core composite piles can employ a mixing tank 500 and a mixer 600. The mixing tank 500 is used to hold the drilling mud from any mud tank in at least two circulation tanks 400, the slag from the sedimentation tank, and other materials for preparing the fluidized solidified soil. The mixer 600 is used to mix the materials for preparing the fluidized solidified soil contained in the mixing tank 500.

[0039] Without adding a mixing and slurry preparation device or a mixing tank, a solidifying agent, precipitated slag, and other materials for preparing fluidized solidified soil can be added to any one of the slurry tanks.

[0040] Furthermore, referring to Figures 1 to 3The working system for constructing precast core composite piles also includes a casing 900, which is installed at the opening of the precast hole 10. The casing 900 protects the opening of the precast hole 10 and prevents it from collapsing. More preferably, the casing 900 is provided with a discharge port 910, which is connected to the outlet 410 of the first-end circulation pool 420. This ensures a smoother connection between the precast hole 10 and the first-end circulation pool 420, allowing for smooth flow of drilling mud and slag during forward circulation and drilling mud during reverse circulation. After the pile is lifted and driven by the crane 300, the casing 900 can be removed, the verticality of the precast core pile 20 can be readjusted, and then the upper part of the precast core pile 20 can be fixed.

[0041] Preferably, the operating system for constructing pre-drilled cored composite piles also includes a hydrometer and a flow meter. The hydrometer is used to determine the specific gravity of the drilling mud or the fluidized solidified soil, and the flow meter is used to determine the flow rate of the drilling mud flowing through the grouting pipe 200. That is, the hydrometer can be used to determine the specific gravity of the drilling mud in each mud tank, as well as the specific gravity of the mixed drilling mud in each mud tank. The specific gravity of the drilling mud will be the basis for determining the amount of slag and solidified soil added, and for determining the specific gravity of the fluidized solidified soil after mixing. Only after the specific gravity meets the design requirements can it be pumped into the pre-drilled hole 10. In addition, the hydrometer can also determine the specific gravity of the drilling mud at the pre-drilled hole opening displaced by the pumped fluidized solidified soil. If the measured specific gravity is still that of the drilling mud, the pumping of fluidized solidified soil continues until the measured specific gravity is that of the fluidized solidified soil, confirming that the replacement is complete.

[0042] To ensure the verticality of the precast core pile 20 in the fluidized solidified soil and its coaxiality with the pre-drilled hole 10, refer to Figure 4 The working system for constructing precast core composite piles also includes a fixer 1000. The fixer 1000 is installed at the opening of the precast hole 10 to secure the end of the precast core pile 20. After the precast core pile 20 is driven to the bottom of the precast hole 10, the verticality and coaxiality of the precast core pile 20 are readjusted using a crane 300, and then fixed by the fixer 1000 to form a composite pile with better pile quality. Alternatively, the fixer 1000 can be installed at the initial driving of the precast core pile 20, thus securing the upper end of the previous precast core pile 20 during pile splicing, facilitating splicing and achieving the designed pile driving depth.

[0043] The precast core piles constructed using the operating system of this embodiment can be assembled from multiple unit pile sections via spring clips, welding, or other methods. This requires only a small crane (300mm) for lifting, making it suitable for low-clearance, narrow sites and facilitating transportation. Precast reinforced concrete piles, steel pipe concrete piles, or steel profile piles are preferred for the unit pile sections. These types of piles have the advantages of high rigidity and heavy weight, and their self-weight can overcome the buoyancy generated by the solidification of the fluidized soil, allowing them to sink naturally. Only a crane (300mm) is needed for lifting. The pile type of the unit pile section can be square piles, pipe piles, sheet piles, bamboo-joint piles, or other irregularly shaped piles. Irregularly shaped piles, due to their irregular outer shape, can increase the pull-out strength with the solidified soil, resulting in better core piles. Of course, other precast core pile materials and pile types are also possible.

[0044] Reference Figure 1 and Figure 2 The drilling equipment 100 is preferably a rotary drilling rig or an impact drilling rig. Generally, a rotary drilling rig can be used to drill holes, but when encountering boulders, rockfill, or hard strata, an impact drilling rig can be used locally, thus making it suitable for most geological conditions. Furthermore, the small size of rotary or impact drilling rigs greatly reduces the clearance requirements of the construction site, making them suitable for sites with low clearance and narrow spaces.

[0045] The working system for constructing pre-drilled cored composite piles also includes a sand content testing kit for determining the sand content of the drilling mud. For example, the sand content testing kit can be a combination of a filter cloth, two identical filter buckets, and a weighing scale. A certain amount of drilling mud is filled into one filter bucket, weighed using the scale, and then poured onto the filter cloth. The other filter bucket catches the filtered drilling mud underneath the filter cloth. The sand on the filter cloth and the filter bucket underneath are then weighed to quickly calculate the sand content. Finally, based on the measured sand content, sufficient slag and solidifying agent can be added to meet the structural strength requirements of the solidified fluidized soil. If the sand content is too low, additional sand can be added.

[0046] Reference Figure 3 Crane 300 can be any lifting machinery with lifting capacity that meets the lifting requirements of precast core pile 20 and other machinery that can perform the same lifting function, including but not limited to truck cranes, gantry cranes or crawler cranes, forklifts, etc., which can be used according to the actual situation during construction.

[0047] Even better, a slag screening machine can be used to screen the slag. Homogeneous slag or slag within a certain size is preferred, so it can be screened by a slag screening machine to form high-quality fluidized solidified soil.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A working system for constructing a pre-bored reinforced composite pile, characterized in that, The drilling device is used for drilling a pre-hole, the circulating mud pump can rotate forward and reverse, the circulating mud pump is communicated with a drill rod of the drilling device, and the at least two circulating pools are sequentially communicated.

2. The system for constructing a pre-bored reinforced composite pile according to claim 1, wherein, When the circulating mud pump rotates forward, hole-forming mud and muck formed in the process of drilling the pre-hole by the drilling device are discharged from the pre-hole to the first circulating pool, the first circulating pool is a sedimentation pool, and the circulating pools other than the first circulating pool are mud pools; when the circulating mud pump rotates reversely, the hole-forming mud and muck formed in the process of drilling the pre-hole by the drilling device are discharged from the drill rod of the drilling device to the tail-end circulating pool through the circulating mud pump and the slurry pipe, the tail-end circulating pool is a sedimentation pool, and the circulating pools other than the tail-end circulating pool are mud pools.

3. The system for constructing a pre-holed reinforced composite pile according to claim 2, wherein, The operation system further comprises a stirring and slurry preparation device and an additional mud pump, the stirring and slurry preparation device is used for stirring and preparing flowable solidified soil, the stirring and slurry preparation device is provided with a first material inlet and a second material inlet, the second end of the slurry pipe is detachably connected to the first material inlet of the stirring and slurry preparation device, and the second material inlet of the stirring and slurry preparation device is connected to any mud pool in the at least two circulating pools through the additional mud pump.

4. The system for constructing a pre-holed reinforced composite pile according to claim 2, wherein, The operation system further comprises a stirring pool and a stirrer, the stirring pool is used for containing hole-forming mud in any mud pool in the at least two circulating pools, muck in the sedimentation pool and other materials for preparing flowable solidified soil, and the stirrer is used for stirring the materials for preparing flowable solidified soil contained in the stirring pool.

5. The system for constructing a pre-bored reinforced composite pile according to claim 2, wherein, The operation system further comprises a casing, which is arranged at a hole opening of the pre-hole.

6. The system for constructing a pre-bored reinforced composite pile according to claim 5, wherein, The casing is provided with a discharge opening, and the discharge opening of the casing is communicated with the discharge opening of the first circulating pool.

7. The system for constructing a pre-bored reinforced composite pile according to claim 6, wherein, The operation system further comprises a specific gravity meter and a flow meter, the specific gravity meter is used for measuring the specific gravity of hole-forming mud or flowable solidified soil, and the flow meter is used for measuring the flow rate of hole-forming mud flowing through the slurry pipe.

8. The system for constructing a pre-bored reinforced composite pile according to claim 1, wherein, The operation system further comprises a fixer, which is arranged at the hole opening of the pre-hole to fix the end of the precast core pile.

9. The system for constructing a pre-bored reinforced composite pile according to claim 1, wherein, The drilling device is a rotary drill or an impact drill.

10. The system for constructing a pre-bored reinforced composite pile according to claim 1, wherein, The operation system further comprises a sand content measurement test assembly for measuring the sand content of hole-forming mud.

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