Pile foundation hole cleaning device

Abstract

This invention relates to the technical field of pile foundation hole cleaning, specifically disclosing a pile foundation hole cleaning device. It provides a mud separation device, including a slag storage container, a main sand pump, and an auxiliary mud pump. The slag storage container is equipped with a lifting ring and a slag discharge switch. The main sand pump includes a base, a sand suction port, and a sand discharge port. The auxiliary mud pump is equipped with a slurry suction port and a slurry spraying port. This invention is simple and lightweight, achieving self-circulating separation of mud and sediment at the bottom of the hole. It can thoroughly remove sediment from the bottom of the hole, reduce the impact on the hole wall, and ensure the quality of pile formation.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation hole cleaning, in particular to a pile foundation hole cleaning device. Background Art

[0002] In bored pile foundation construction, punched pile construction technology is widely used. Generally, bored pile construction requires two hole cleaning operations. The first hole cleaning is carried out after the pile hole construction reaches the designed depth. It is mainly to replace the mud and to remove the sediment. The mud performance basically meets the requirements. Its main purpose is to find out the actual hole bottom depth so that the sediment thickness can be calculated during the second hole cleaning. At the same time, the relative density of the mud is adjusted to facilitate hole inspection and meet the requirements of pouring concrete.

[0003] After bored cast-in-place piles are formed and before underwater concrete is poured, two processes are required: lowering the steel cage and the conduit. During this time, the suspended particles in the mud in the hole are bound to sink in large quantities, and eventually cannot be impacted and rebounded by the concrete, becoming permanent sediment. At the same time, in the process of lowering the steel cage, the hole wall may collapse partially due to the steel cage touching the hole wall, or the mud skin on the hole wall may fall to the bottom of the hole, thereby increasing the thickness of the sediment at the bottom of the hole. Therefore, in order to ensure the quality of bored cast-in-place piles, secondary hole cleaning must be carried out before pouring underwater concrete. Its main purpose is to remove the sediment at the bottom of the hole, and the sediment at the bottom of the hole is one of the main factors affecting the bearing capacity of bored cast-in-place piles.

[0004] The commonly used secondary hole cleaning methods are grouting and slurry extraction. The grouting method uses the conduit for pouring underwater concrete as a pipeline, and uses a mud pump to press standard mud into the hole to suspend the sediment at the bottom of the hole and circulate upward to discharge; when using this method to clean the hole, since the mud concentration is relatively thin, large particles will not be suspended by the mud and discharged out of the hole, and the hole cleaning effect is poor. The slurry extraction method uses a mud pump to directly extract the sediment and mud from the bottom of the hole. The hole cleaning is more thorough. Since the mud performs reverse circulation in the hole, the original water level in the hole should always be maintained to prevent the hole from collapsing. A high-power mud pump is required for deep hole slurry extraction. The equipment is bulky and occupies space. Summary of the invention

[0005] The purpose of the present invention is to provide a mud separation device in view of the characteristics of secondary hole cleaning of bored piles, which can more thoroughly remove the sediment at the bottom of the hole and reduce the impact on the hole wall to ensure the quality of the pile.

[0006] In order to achieve the above-mentioned purpose of the present invention, the technical solution adopted is:

[0007] A pile foundation hole cleaning device, used for cleaning insoluble large particles at the bottom of the pile foundation, the device comprising:

[0008] A main sand pump having a sand suction port for sucking slurry and a sand discharge port for discharging slurry;

[0009] an auxiliary mud pump, having a slurry suction port for sucking slurry and a slurry spraying port for spraying slurry;

[0010] A slag storage device having slurry filtering holes for filtering slurry, wherein the slurry filtering holes are distributed in a mesh structure;

[0011] Wherein, an auxiliary mud pump is installed on the side wall of the main sand pump, and the sand outlet of the main sand pump is connected to the slag storage device.

[0012] The diameter of the filter hole is 1 to 2 cm.

[0013] Furthermore, a slag discharge switch is provided at the bottom of the slag storage container.

[0014] Furthermore, a lifting ring is installed on the top of the slag storage container.

[0015] Furthermore, the slag storage container has a conical structure.

[0016] Furthermore, the main sand pump is a vertical sand pump, and a base is installed at the sand suction port thereof.

[0017] Furthermore, the side of the base is an open structure, which is conducive to the surrounding sediment entering the main sand pump through the sand suction port, and then being discharged upward from the sand outlet and entering the slag storage container.

[0018] Furthermore, the plane of the grouting port is set at a certain angle to the vertical plane, and the angle is 0-180 degrees, which can facilitate the injection of mud to the bottom of the pile hole to stir the sediment at the bottom and make it float up, so that the main sand pump can suck it away.

[0019] Furthermore, a filter is provided at the slurry suction port to prevent large particles of sediment from entering the auxiliary mud pump; in order to prevent the auxiliary mud pump from being blocked by sediment adsorbed on the slurry suction port due to a long startup time, the auxiliary mud pump adopts an intermittent and repeated start and stop method. When the auxiliary mud pump is paused, the mud flows and impacts the slurry suction port of the auxiliary mud pump to flush away the sediment adsorbed thereon, thereby effectively preventing the slurry suction port of the auxiliary mud pump from being blocked by sediment.

[0020] Furthermore, the auxiliary mud pump and the main sand pump are welded by steel plates, and the number of the auxiliary mud pumps can be 2 to 4.

[0021] The substantial features and progress of the present invention compared with the prior art are as follows: compared with the grouting method and the grouting method, the present invention can adopt a low-power sand pumping device, which is simple and light, and realizes the self-circulation separation of mud and sediment at the bottom of the pile foundation, that is, the mud at the bottom of the pile foundation hole is stirred in advance by an auxiliary mud pump to make the sediment in a suspended state, and the main sand pump is started to extract the mud, and the sediment contained in the mud is pumped into the slag remover by the main sand pump, and through the action of the slurry filter holes on the slag storage device, particles larger than the diameter of the slurry filter holes are retained in the sand storage device; under the action of the main sand pump and the auxiliary mud pump, it can be ensured that the sediment at the bottom of the hole is cleaned up, and the collapse of the hole wall caused by the influence of strong convection movement can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a pile foundation hole cleaning device of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the present invention applied to construction;

[0024] The serial numbers and component names in the figure are: 1-main sand pump, 2-sand suction port, 3-base, 4-sand outlet, 5-slag storage device, 6-slag unloading switch, 7-lifting ring, 8-slurry filter hole, 9-auxiliary mud pump, 10-spraying port, 11-slurry suction port, 12-lifting rope, 13-sediment, 14-rebar cage, 15-soil, 16-conduit. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] like Figure 1 As shown, a pile foundation hole cleaning device is used to clean the insoluble large particles at the bottom of the pile foundation, and the device comprises:

[0033] A main sand pump 1, having a sand suction port 2 for sucking slurry and a sand discharge port 4 for discharging slurry;

[0034] an auxiliary mud pump 9, having a mud suction port 11 for sucking mud and a mud spraying port 10 for spraying mud;

[0035] A slag storage container 5 having a slurry filtering hole 8 for filtering slurry;

[0036] The auxiliary mud pump 9 is installed on the side wall of the main sand pump 1 , and the sand outlet 4 of the main sand pump 1 is connected to the slag storage 5 .

[0037] The diameter of the slurry filter hole 8 is 1 to 2 cm.

[0038] The bottom of the slag storage container 5 is provided with a slag discharge switch 6, which is convenient for discharging the sediment collected in the sand storage container.

[0039] A lifting ring 7 is installed on the top of the slag storage container 5, which can be used to lift the entire device into the pile foundation hole.

[0040] The structure of the slag storage container 5 is conical, and the diameter of the slag storage container 5 shrinks from bottom to top, which can help to increase the flow rate of the mud discharged from the slag storage container 5; that is, when the main sand pump 1 absorbs mud through the sand suction port 2 and then discharges it into the slag storage container 5 from the sand outlet 4, the mud is discharged outward from the filter hole 8 on the slag storage container 5 under the action of water pressure. Due to the structural limitations of the filter hole 8 and the slag storage container 5, the flow rate of the discharged mud can be effectively increased, and the discharged mud has an auxiliary stirring effect on the mud in the bottom of the pile foundation, and can also prevent the sediment in the pile foundation from settling too quickly when the main sand pump 1 works alone.

[0041] The main sand pump 1 is a vertical sand pump, and a base 3 is installed at the sand suction port 2 thereof.

[0042] The side surface of the base 3 is an open structure, so that when the base 3 plays a supporting role, it will not hinder the mud from entering the sand suction port 2 from the side surface.

[0043] The plane of the grouting port 10 is set at a certain angle to the vertical plane, and the angle is 0-90°, preferably 60°, 45° or 30°, which can help to spray mud to the bottom of the pile hole to stir the sediment at the bottom and make it float up, so that the main sand pump 1 can suck it away.

[0044] The slurry suction port 11 is in a conical shape and is provided with a filter screen to prevent large particles of sediment from entering the auxiliary slurry pump.

[0045] The auxiliary mud pump 9 and the main sand pump 1 are welded by steel plates.

[0046] Working principle of the present invention:

[0047] like Figure 2 As shown, after the pile foundation is formed and the hole is cleaned once, the steel cage 14 and the guide tube 16 are lowered. Before pouring underwater concrete, the guide tube 16 is moved to the edge of the pile hole, and the pile foundation hole cleaning device of the present invention is lowered by the lifting rope 12. After it is ready, the auxiliary mud pump 9 is first started, and the sediment at the bottom of the pile base is stirred by the auxiliary mud pump 9 to make the bottom sediment float upward. After a period of time, the auxiliary mud pump 9 is turned off, and then the main sand pump 1 is started. The suspended sediment is sucked into the slag storage device 5, and the mud is filtered through the slag storage device 5 and discharged from the slag storage device 5. The large particles of stone in the mud are blocked by the filter hole 8 and stored in the cage. After a period of time, the main sand pump 1 is turned off, and the auxiliary mud pump 9 is started. After repeating this operation several times, the device of the present invention is lifted out of the hole and the sediment 13 is unloaded.

Claims

1. A pile foundation hole cleaning device, used to clean the insoluble large particles at the bottom of the pile foundation, characterized in that include: A main sand pump (1) having a sand suction port (2) for sucking slurry and a sand discharge port (4) for discharging slurry; an auxiliary mud pump (9) having a mud suction port (11) for sucking mud and a mud spraying port (10) for spraying mud; A slag storage container (5) having a slurry filtering hole (8) for filtering slurry; Wherein, an auxiliary mud pump (9) is installed on the side wall of the main sand pump (1), and the sand outlet (4) of the main sand pump (1) is connected to a slag storage device (5); The diameter of the slurry filter hole (8) is 1 to 2 cm; A slag discharge switch (6) is provided at the bottom of the slag storage container (5); The structure of the slag storage device (5) is conical; the diameter of the slag storage device (5) shrinks from bottom to top, which can help increase the flow rate of the mud discharged from the slag storage device (5); that is, when the main sand pump (1) absorbs mud through the sand suction port (2) and then discharges it into the slag storage device (5) through the sand outlet (4), the mud is discharged outward from the filter hole (8) on the slag storage device (5) under the action of water pressure. Due to the structural restrictions of the filter hole (8) and the slag storage device (5), the flow rate of the discharged mud can be effectively increased, and the discharged mud has an auxiliary stirring effect on the mud at the bottom of the pile foundation. It can also prevent the sediment in the pile foundation from settling too quickly when the main sand pump (1) works alone; The main sand pump (1) is a vertical sand pump, and a base (3) is installed at the sand suction port (2) thereof; The side surface of the base (3) is an open structure; The plane of the spraying port (10) is arranged at a certain angle to the vertical plane; the angle is 0 to 180°; The slurry suction port (11) is provided with a filter screen; the auxiliary slurry pump is started and stopped intermittently and repeatedly; when the auxiliary slurry pump is stopped, the slurry flow impacts the slurry suction port of the auxiliary slurry pump to flush away the sediment adsorbed thereon.

2. The pile foundation hole cleaning device according to claim 1, characterized in that: A lifting ring (7) is installed on the top of the slag storage container (5).

3. The pile foundation hole cleaning device according to claim 1, characterized in that: The auxiliary mud pump (9) and the main sand pump (1) are welded via steel plates.

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