CN114108608A - Control system and method for matrix quantity of bored pile - Google Patents

Abstract

The invention relates to a matrix amount control system for a bored pile, which at least comprises: a first cylinder; and locate built-in subassembly of tamping in the first barrel, its characterized in that, drilling bored concrete pile matrix volume control system still includes wall and puts the subassembly of tamping, wall is put the subassembly of tamping and is included: a first thermally responsive component mounted to the outer wall of the first barrel in a manner such that it is at least partially surrounded by the insulating sleeve to insulate it from the external environment; and the second thermal response assembly is erected on the outer wall of the first cylinder in a manner that the second thermal response assembly is at least partially surrounded by the isolation sleeve so as to be communicated with the external environment, wherein when the wall tamping assembly enters the casting and is thermally started, the second thermal response assembly can form a negative pressure environment in the isolation sleeve and form gas adsorption on the casting under the negative pressure environment, wherein the gas adsorption is enhanced by the excitation of the first thermal response assembly due to thermal starting.

Description

Control system and method for matrix quantity of bored pile

Technical Field

The invention relates to the technical field of buildings, in particular to a system and a method for controlling matrix quantity of a bored pile.

Background

Concrete is an integrally compact engineering composite material formed by combining aggregate with a cementing material (cement), and is widely applied to the field of foundation construction of building engineering, bridge engineering, traffic engineering and the like. During the stirring, transporting and pouring processes of concrete mixture adopted by the bored pile, certain air is mixed into the concrete, bubbles are increased after the concrete is added with the additive, the porosity of the concrete is increased after the concrete is condensed and hardened, and the phenomena of bubbles, sand inclusion, cracks and segregation are found on the surface of a concrete core sample by coring the concrete of the bored pile. The non-compact concrete will cause the weakening of the section of the pile and the reduction of the bearing capacity. Moreover, since the concrete is not dense, there are fine holes and cracks, and external moisture, salt and gas easily invade the interior of the concrete, so as to corrode the reinforcing steel bars, resulting in premature damage to the structure and affecting the service life of the structure. In the process of concrete pouring of the built steel reinforcement framework and the pile foundation, in order to avoid the influence of air bubbles in concrete on the phenomena of compact combination, elimination of cellular pitted surface and the like of the concrete, the poured concrete is tamped by means of special tamping equipment, so that the concrete is combined compactly, the phenomena of cellular pitted surface and the like of the concrete are eliminated, the combination strength of the concrete is improved, and the quality of a concrete member is ensured.

In view of the above, in the prior art, for example, patent document CN111705802B discloses a cast-in-place concrete long pile vibrating device and a construction method thereof, which relate to the technical field of cast-in-place concrete pile construction and include a pile casing, a guide pipe, a steel base and a concrete funnel; the upper part of the steel base is provided with a supporting vertical seat and a motor; the funnel is placed on the supporting vertical seat; the end of the motor is connected with a transmission rod, and one end of the transmission rod is provided with a transmission bevel gear; the transmission bevel gear is matched with the driven bevel gear on the upper part of the transmission conduit, the middle part of the transmission conduit is provided with a concentric bearing, and the bearing is placed in a groove reserved at the bottom of the support vertical seat; the conduit is located between the drive conduit and the bumped conduit, the bumped conduit being located lowermost.

Still put forward an auxiliary vibration device as patent document that publication number is CN113338269A, equally relate to concrete bored concrete pile construction technical field to the construction progress that exists among the solution prior art is slow, there is the potential safety hazard and the high technical problem of construction cost, and its auxiliary vibration device installs on the pile bolck pile casing at pile foundation armguard top, and the device include the same and symmetry of structure set up first bearing structure and second bearing structure and connect in first bearing structure with the last lifting means of second bearing structure, it suspends the piece in midair to be provided with on the lifting means, suspend the bottom of piece in midair and pass through the connecting piece and connect the vibrating rod. The vibrating rod can move up and down quickly in the pile hole, so that the vibrating quality of concrete and the safety of operators are guaranteed, and the pile foundation construction efficiency is improved.

However, most of the auxiliary devices related to the technical field of cast-in-place concrete pile construction adopt a single vertical lifting type vibrating action, so that the cast object, i.e. gas dispersed in the concrete, cannot be effectively discharged, and meanwhile, the vibrating part playing a role of vibration excitation is arranged in the device, so that the contact area between the vibrating part and the concrete is limited, and the vibration excitation cannot be sufficiently conducted to the cast object in a larger range.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the applicant has studied a great deal of literature and patents when making the present invention, but the disclosure is not limited thereto and the details and contents thereof are not listed in detail, it is by no means the present invention has these prior art features, but the present invention has all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a matrix control system for a bored pile, which at least comprises: a first cylinder; and locate built-in subassembly of tamping in the first barrel, its characterized in that, drilling bored concrete pile matrix volume control system still includes wall and puts the subassembly of tamping, wall is put the subassembly of tamping and is included: a first thermally responsive component mounted to the outer wall of the first barrel in a manner such that it is at least partially surrounded by the insulating sleeve to insulate it from the external environment; and the second thermal response assembly is erected on the outer wall of the first cylinder in a manner that the second thermal response assembly is at least partially surrounded by the isolation sleeve so as to be communicated with the external environment, wherein when the wall tamping assembly enters the casting and is thermally started, the second thermal response assembly can form a negative pressure environment in the isolation sleeve and form gas adsorption on the casting under the negative pressure environment, wherein the gas adsorption is enhanced by the excitation of the first thermal response assembly due to thermal starting. The first thermal response component is mainly used for generating excitation, and the second thermal response component is mainly used for exhausting gas in the casting. The hot start referred to in this application refers primarily to the action achieved by adjusting the temperature of a heating section provided inside the wall tamping assembly. In the present application, "when the wall tamping unit enters the casting and is hot-started" does not refer to the raising of the temperature of the entire wall tamping unit, but may refer to an action of raising the temperature of the heating portions provided at different locations, respectively, and the heating portions provided at different locations may be raised simultaneously or asynchronously. The heating parts arranged at different positions can be mutually influenced or completely isolated, wherein the complete isolation mainly means that layers with heat insulation effect, such as isolation sleeves and the like, are isolated among different heating parts, so that different heating parts can asynchronously act without influencing each other, and the temperatures of different heating parts can be respectively regulated and controlled in a time-sharing manner. In the present application, the heating portion mainly includes two heating portions located at different positions for thermally activating the first thermal response component and the second thermal response component, respectively. The second thermally responsive component is capable of creating a negative pressure environment within the isolation sleeve in response to a hot start. And under the negative pressure environment, the second thermal response component is enabled to form effective gas adsorption on the casting. The first thermally responsive component is excited to effectively excite vibration due to hot start. The excitation effect obtained by exciting the first thermal response assembly can enhance the gas adsorption effect formed by the second thermal response assembly, so that the gas dispersed in the casting, namely concrete, can be better discharged, the contact area between the device and the casting is increased by the wall tamping assembly, and the excitation effect can be sufficiently conducted to the casting in a wider range.

According to a preferred embodiment, the first thermally responsive member is configured such that its excitation, which is activated when the wall tamper assembly enters a casting and is thermally activated, is variable in response to a change in the position of the first barrel in a piling in which the reinforcement cage is at least partially surrounded by the casting. Before pouring, a reinforcement cage is placed in the pile foundation, and along with pouring of the pouring object, the pouring object gradually surrounds and wraps the reinforcement cage in the pile foundation from bottom to top. First barrel can be transferred to pouring in and smash through erect the position regulation and control equipment outside the pile foundation to accessible position regulation and control equipment changes its relative position in the pile foundation. Establishing X-axis and Y-axis coordinates perpendicular to each other on the cross section of the pile foundation and establishing Z-axis coordinates perpendicular to the cross section of the pile foundation along the vertical direction of the pile foundation, wherein the relative position or positions referred to in the application refer to the relative positions determined in the three-dimensional coordinate system.

According to a preferred embodiment, the isolating sleeve is arranged on the outer wall of the first cylinder in a foldable manner and is provided with an inner isolating sleeve and an outer isolating sleeve, and an interlayer space which can be communicated to the external environment through at least one first vent hole arranged on the outer isolating sleeve and is used for forming the negative pressure environment is reserved between the inner isolating sleeve and the outer isolating sleeve.

According to a preferred embodiment, the first thermally responsive member comprises at least one responsive layer capable of undergoing a form change in response to the wall tamping assembly entering the casting and being thermally activated, for changing the effective spatial volume of the sandwiched space formed between the inner and outer insulating sleeves.

According to a preferred embodiment, the first thermal response assembly further comprises at least one isolating inner layer which is respectively arranged on the inner wall of the outer isolating sleeve in a mode of surrounding at least one first vent hole on the outer isolating sleeve, and the interlayer space between the inner isolating sleeve and the outer isolating sleeve is not less than the sum of surrounding spaces formed between the isolating inner layers and the outer isolating sleeve or the difference between the surrounding spaces formed between the isolating inner layers and the outer isolating sleeve meets a threshold value range.

According to a preferred embodiment, the system can selectively draw or expel gas through the first vent by varying the volume of the interlayer space in a manner that modulates the configuration of the responsive layer relative to the isolated inner layer.

According to a preferred embodiment, the first cylinder can be inserted into the casting in its first radial dimension and switched to the second dimension after insertion by adjusting the relative position of the wall tamping assembly on the first cylinder. The first dimension and the second dimension refer to width parameters of the first cylinder in a radial direction thereof. For the pile foundation construction, a plurality of reinforcing steel bars are criss-cross to form a plurality of rectangular three-dimensional spaces, and the three-dimensional spaces which are parallel in the vertical direction are called local spaces limited by the criss-cross reinforcing steel bars in the application.

According to a preferred embodiment, when the relative position between the first cylinder suspended in the pile foundation and the reinforcement cage assembled in the pile foundation is adjusted, the local space formed by the first cylinder and limited by the reinforcement varies, and the wall tamping assembly is influenced by the magnetism of the reinforcement enclosed outside the first cylinder, so that the excitation activated when the wall tamping assembly enters the casting and is hot started is enhanced.

According to a preferred embodiment, the first cylinder has a cavity and a second cylinder sleeved in the cavity of the first cylinder in a manner that the length extension direction of the second cylinder is consistent with that of the first cylinder, and an inter-cylinder gap is reserved between the second cylinder and the first cylinder.

According to a preferred embodiment, the wall tamping assembly has a cavity and at least a first thermally responsive assembly for generating a vibrating action is provided in the cavity, the first thermally responsive assembly comprising at least a coating and a compressible resilient element and a movable magnetic element provided in the coating, the compressible resilient element having one end connected to the fixed magnetic element, the movable magnetic element forcing the compressible resilient element to deform in the event of a magnetic influence on the compressible resilient element moving in the coating and being reversibly movable under the elastic potential energy released by the compressible resilient element in the event of a change in said magnetic influence.

According to a preferred embodiment, the first thermal response assembly further comprises a fixed magnetic member relatively fixed in the cladding, the compressible elastic member is formed between the fixed magnetic member and the movable magnetic member to isolate the fixed magnetic member from the movable magnetic member, and the relative distance between the fixed magnetic member and the movable magnetic member can be changed by the magnetic influence of the fixed magnetic member on the fixed magnetic member and the magnetic influence of the steel bars enclosed outside the first cylinder.

When the first cylinder is inserted into a local space defined by criss-cross steel bars in a casting, the wall tamping assembly is influenced by the magnetic property of the steel bars enclosed outside the first cylinder to enter an unsteady state so as to generate a second vibration coupled with the first vibration generated by the built-in tamping assembly. Reference in this application to the unsteadiness of the wall tamping assembly is primarily to the fact that the magnetic attraction experienced by the movable magnetic member is variable or dynamically variable. The first vibration referred to in this application refers primarily to the vibratory action achieved by the drive motor of the built-in tamping assembly. The second vibration referred to in this application refers primarily to the vibratory action of the wall tamping assembly entering an unstable state under the magnetic influence of the reinforcing bars enclosed outside the first cylinder. The second vibration referred to in this application does not refer to the vibration effect caused by the magnetic influence of the steel bars enclosed outside the first cylinder, but also includes the combined effect of the magnetic influence formed by the coupling with the fixed magnetic element.

According to a preferred embodiment, the first thermal response assembly further comprises a phase change portion disposed within the covering, the phase change portion at least partially covering the fixed magnetic element, the movable magnetic element, and the elastic compressible element and being configured to form a first configuration that limits the relative positions of the movable magnetic element and the elastic compressible element within the covering when the triggering condition is activated and a second configuration that allows the movable magnetic element and the elastic compressible element to move relative to each other within the covering when the triggering condition is deactivated.

According to a preferred embodiment, the first thermal response assembly comprises two elastic compressible members, which are respectively arranged on two opposite sides of the movable magnetic member and respectively have free ends far away from the side of the movable magnetic member.

According to a preferred embodiment, the projection area of the wall tamping assembly on the projection plane perpendicular to the direction of the longitudinal extension of the first cylinder is associated to the projection area of the first cylinder and of the second cylinder on the projection plane.

The application provides a control method for matrix quantity of a bored pile, which is characterized by at least comprising the following steps:

when the wall tamping assembly is placed into a casting, the wall tamping assembly is regulated and controlled to be hot started;

under the hot start environment, the second thermal response assembly forms a negative pressure environment in the isolation sleeve;

under the negative pressure environment, the gas adsorption effect formed by the casting is enhanced by the excitation effect of the first thermal response assembly excited by the hot start.

Drawings

Fig. 1 is a schematic view of a simplified state of use of a bored pile matrix control system of the present application after being lowered into a pile foundation;

FIG. 2 is a simplified schematic illustration of the position of a wall tamping assembly on a first barrel in a bored pile matrix control system according to the present application;

fig. 3 is a schematic diagram of a simplified linkage relationship among a distributed gear, a central gear and a transmission groove in the bored pile matrix control system.

List of reference numerals

1: a tamping component is arranged inside; 2: a wall mounted tamping assembly; 3: a first cylinder; 4: a second cylinder; 5: mounting holes; 6: a gap between the cylinders; 7: a drive connection assembly; 8: a tamping device; 9: a support member; 10: a transmission groove; 11: a vertical top surface; 12: a vertical bottom surface; 13: a transmission rod; 14: a mounting surface; 15: a central barrel; 16: a sun gear; 17: a distributed gear.

Detailed Description

The present application will be described in detail below with reference to the accompanying drawings.

The application provides a bored pile matrix control system, which at least comprises a tamping device 8, wherein the tamping device is used for inserting uncured pouring objects and exciting the uncured pouring objects in the concrete pouring process. When the tamping equipment works, the vibrating head is inserted into the concrete, the vibration waves of the vibrating head are directly transmitted to the concrete, so that the internal friction force and the adhesive force between particles in the concrete are reduced sharply, and the concrete is in a heavy liquid state. Under the action of the exciting force, aggregate particles slide to approach each other and are rearranged, gaps among the aggregates are filled with cementing materials such as mortar, and air in the mixture drives a part of cement paste to be extruded out of the upper part and is discharged to the outside, so that the tamping effect is achieved.

Compared with the traditional single cylinder structure which only arranges the built-in tamping assembly 1 inside the tamping device 8 and has limited effective tamping range, the tamping device 8 provided by the application is simultaneously provided with the built-in tamping assembly 1 and the wall tamping assembly 2 which have mutually coupled shock excitation effects and can act on the casting, and the wall tamping assembly 2 can extend to the outside of the tamping device 8 to change the relative position relationship between the wall tamping assembly 2 and the built-in tamping assembly 1, under the arrangement, on one hand, the traditional single cylinder structure is changed, and due to the change of the relative position relationship between the built-in tamping assembly 1 and the wall tamping assembly 2, when the tamping device 8 provided by the application enters the casting, a larger effective tamping range can be formed, and the traditional single cylinder structure is different from the wolf tooth rod structure which is additionally provided with a plurality of extended stirring strips in the traditional single cylinder structure in the prior art, the part that extends to the outside of tamping unit 8 in this application contains wall and puts tamping unit 2, is located different positions and the different cooperation of excitation form built-in tamping unit 1 and wall and puts tamping unit 2 and forms certain unordered excitation coupling effect to can reach better excitation effect. On the other hand because the variability of the relative position relation between built-in tamping unit 1 and wall tamping unit 2 can be converted into a structure similar to a straight cylinder before the tamping device 8 provided by the application is placed in the casting, which is beneficial to the smooth entering of the casting with smaller placing resistance, so as to realize fast insertion and slow extraction and avoid leaving a gap in the casting due to the insertion and extraction process.

For the purpose of varying the relative positional relationship between the internal tamping unit 1 and the wall tamping unit 2, the first cylinder 3 of the tamping unit 8 has a cavity and the second cylinder 4 is arranged in the cavity. The second cylinder 4 is sleeved in the first cylinder 3 in a manner that the extending direction of the second cylinder is consistent with that of the first cylinder 3. An inter-barrel gap 6 is reserved between the second barrel 4 and the first barrel 3.

Through the inter-drum gap 6, the projection area of the wall tamping assembly 2 on the projection plane perpendicular to the first direction is linked to the projection area of the first drum 3 and the second drum 4 on the projection plane. In other words, the wall tamping assembly 2 is a whole body composed of a plurality of components, and the whole body has a connection relationship with the first cylinder 3 and the second cylinder 4, and the connection relationship mentioned herein does not absolutely refer to a fixed connection, but may be a through sliding connection or a linkage indirect connection, etc. The first direction refers to a direction of length extension of the tamping device 8, which is similar to a cylindrical structure as a whole, and may also refer to a vertical direction.

In order to realize the relationship between the projection area of the wall tamping assembly 2 on the projection plane perpendicular to the first direction and the projection area of the first cylinder 3 on the projection plane, at least one mounting hole 5 is formed on the wall of the first cylinder 3. Both ends of the mounting hole 5 communicate with the outside of the first cylinder 3 and the inter-cylinder gap 6, respectively. The mounting hole 5 is used to guide the direction of movement of the wall tamper assembly 2 extending outside the tamper arrangement 8.

The mounting hole 5 may be formed in the wall of the first cylinder 3 in such a manner that the direction of the through hole is perpendicular to the first direction. Since the wall tamping assembly 2 extends through the mounting opening 5 and is located in the fluid casting, i.e. concrete, during operation, in order to prevent the fluid casting from entering or blocking the mounting opening 5, a spacer sleeve is also provided on the wall of the first cylinder 3. One end of the isolation sleeve is connected to the outer side of the mounting hole 5 in a circumferential annular mode around the mounting hole 5. The other end of the spacer sleeve is annularly connected to the outer side of the wall tamping assembly 2. The outer side of the wall tamping assembly 2 may refer to the end of the wall tamping assembly 2 extending outside the mounting hole 5. The isolation sleeve can be a folding rubber telescopic sleeve, and a plurality of folding parts are arranged in the folding direction of the isolation sleeve. The spacer sleeve can be folded or unfolded as the wall tamping assembly 2 is moved from the mounting hole 5 to the exterior or interior of the first cylinder 3. With the arrangement, the fluid casting entering the tamping device 8 from the mounting hole 5 during the use process can be effectively prevented from influencing the normal operation of the internal components.

In order to reduce the size of the tamping unit 8 in and out of the casting, an annular groove is provided in the first cylinder 3 in the circumferential direction of the mounting hole 5. The end of the spacer sleeve which is connected to the outside of the mounting hole 5 is connected in the inner wall of the annular groove. The spacer sleeve can be at least partially folded into the annular groove, reducing the radial dimension of the tamping device 8.

In order to enable a better collapsing of the spacer sleeve in the annular groove, the spacer sleeve, viewed in a radial direction perpendicular to the first direction on the tamping device 8, has a curvature in its width direction which is close to the outer wall of the first cylinder 3. Thereby enabling a further reduction in the radial dimension of the tamper device 8 when it enters and exits the casting.

The wall tamping assembly 2 may be an elongated structure that is shaped to fit the mounting aperture 5. The wall tamping assembly 2 has a cavity and at least a first thermally responsive assembly is provided within the cavity for producing a tamping action.

The first thermally responsive member within the wall tamping assembly 2 may be magnetically influenced by the reinforcing bars surrounding the first barrel 3 into an unstable state to generate a second vibration coupled to the first vibration generated by the internal tamping assembly 1 when the first barrel 3 is inserted into the casting in a localized space defined by the criss-cross reinforcing bars.

A first thermally responsive component is described below that includes one or more of a cladding layer, a phase change portion, a compressible resilient element, a fixed magnetic element, and a movable magnetic element.

The fixed magnetic part is arranged in the cladding layer. The position of the fixed magnetic element in the cladding layer is relatively fixed. An effective magnetic attraction effect for driving the fixed magnetic part and the movable magnetic part to approach each other is formed between the fixed magnetic part and the movable magnetic part. When the first cylinder 3 is inserted into a local space defined by criss-cross steel bars in a casting, the movable magnetic part is subjected to effective magnetic attraction of the external steel bars.

Preferably, the coating layer may be an elongated cylindrical structure having a cavity for accommodating one or more of the phase change portion, the compressible elastic member, the fixed magnetic member, and the movable magnetic member. Preferably, the fixed magnetic member and the movable magnetic member may be both spherical members.

The phase change part is arranged in the cladding layer and at least partially wraps the fixed magnetic piece and the movable magnetic piece. The phase change part has two mutually convertible phase change forms, and can be converted from a solid state into a liquid state after being heated and warmed. The phase change portion is in a solid state at a relatively low temperature and in a liquid state at a relatively high temperature. The inner wall of the coating layer can be provided with a heating part with adjustable temperature for realizing the temperature regulation and control of the phase change part.

Before the first cylinder 3 is inserted into a local space defined by criss-cross steel bars in a casting, the phase change part is in a solid state to limit the relative position relationship between the fixed magnetic element and the movable magnetic element. The wall tamping assembly 2 is not vibrated at this point.

After the first cylinder 3 is inserted into a local space defined by criss-cross steel bars in a casting, the temperature in the cladding is increased, so that the phase change part is converted from a solid state into a liquid state, and the limiting effect of the phase change part on the relative position relation between the fixed magnetic element and the movable magnetic element is relieved. The wall tamping assembly 2 can now be vibrated.

As a preferred embodiment, the coating can be designed as a material that is not easily deformable. The movable magnetic piece is arranged in the coating layer and can move in the coating layer under the trigger condition or be relatively fixed at different positions in the coating layer after the trigger condition is released. The triggering condition mentioned here refers to a change in temperature, or to an operation of withdrawing from or interposing into the casting, or to a corresponding change in the phase change portion due to a change in temperature. Specifically, due to the transformation of the phase change form of the phase change portion, the phase change portion in the solid state will exert a resistance effect on the movable magnetic element to confine it at different positions within the cladding layer. The phase change part in the liquid state releases the resistance effect of the phase change part on the fixed magnetic part, and the movable magnetic part can move relatively in the coating layer along with the magnetic effect of the movable magnetic part.

In this arrangement, the phase change portion in the solid state will act as a resistance to the fixed magnetic element and confine it to different locations within the cladding layer due to the transition of the phase change state of the phase change portion. Preferably, the phase change part in the liquid state releases the resistance effect on the fixed magnetic element, and the fixed magnetic element can move relatively in the cladding layer along with the magnetic effect on the fixed magnetic element.

As a further preferred embodiment, the coating can be designed as a material which is easily deformable. The movable magnetic part is arranged in the coating layer and can move relative to the fixed magnetic part in a mode of deforming the coating layer under a trigger condition. The movable magnetic part is fixedly connected with one end of the coating layer or the inner wall of the coating layer, so that the coating layer is correspondingly deformed when the movable magnetic part moves left and right under the influence of external force. Preferably, in this arrangement, the first thermally responsive component may comprise one or more of a cladding, a phase change, a fixed magnetic element and a movable magnetic element, wherein at least part of the cladding is of an elastomeric material. Here, at least a part of the coating layer means, in particular, a coating layer other than a part of the coating layer which coats the fixed magnetic member, or, in particular, a coating layer located between the fixed magnetic member and the movable magnetic member.

The compressible elastic member is arranged in the cladding layer. One end of the compressible elastic part is a free end, and the other end of the compressible elastic part is relatively fixed on the fixed magnetic part. The compressible elastic element is positioned in the phase change part between the fixed magnetic element and the movable magnetic element to isolate the fixed magnetic element from the movable magnetic element. When the movable magnetic part is subjected to the magnetic action of the fixed magnetic part or other external forces to move towards the fixed magnetic part, the elastic potential energy of the compressible elastic part is increased along with the increase of the deviation degree between the distance between the fixed magnetic part and the movable magnetic part and the preset distance threshold value; the elastic potential energy of the compressible elastic part is reduced along with the reduction of the deviation degree between the distance between the fixed magnetic part and the movable magnetic part and the preset distance threshold value, so that the movable magnetic part generates high-frequency vibration.

Preferably, the wall tamping assembly 2 comprises an inner and an outer sleeve structure, the outer sleeve having a first end of the wall tamping assembly 2 which is always located inside the first cylinder 3, and the inner sleeve having a second end of the wall tamping assembly 2 which is movable outside the first cylinder 3 through the mounting hole 5. As a preferred embodiment, for the outer wall of the cladding layer of the first thermal response component corresponding to the position where the movable magnetic element is arranged, the outer wall may be fixedly connected to the inner wall of the second end of the inner sleeve. So that the high-frequency vibrations generated by the movable magnetic elements are better transmitted to the casting located outside the wall tamping assembly 2. As another preferred embodiment, for the outer wall of the cladding layer of the first thermo-responsive component corresponding to the position where the fixed magnetic member is disposed, the outer wall may be fixedly connected to the inner wall of the other end portion of the inner sleeve opposite to the second end portion thereof. So that the high-frequency vibrations generated by the movable magnetic elements are better transmitted to the casting located outside the wall tamping assembly 2.

The first thermally responsive assembly is disposed within the wall tamping assembly 2 in such a manner that the movable magnetic member is closer to the second or free end of the wall tamping assembly 2 than the stationary magnetic member. In this arrangement, the high frequency vibrations generated by the moving magnets occur at the distal end of the wall mounted tamper assembly 2 similar to a cantilever, thereby enhancing the degree or range of vibration radiation.

Preferably, the outer wall of the isolation sleeve can be provided with a plurality of extension rods. Because the isolation sleeve is connected with the wall tamping assembly 2, high-frequency vibration generated by the wall tamping assembly 2 is synchronously transmitted to the isolation sleeve, so that the extension rod extending into the casting on the outer wall of the isolation sleeve performs tamping action on the casting to further enhance the tamping effect.

The plurality of extension rods may be spaced apart from one another around the circumference of the spacer sleeve. The plurality of extension rods may form a ring shape, and may be one or a plurality of extension rods arranged along the length of the wall tamping assembly 2. For example, a plurality of layers of extension rods are arranged around the circumference of the isolation sleeve at intervals, and each layer comprises a plurality of extension rods. The plurality of extension rods can also be arranged on the outer wall of the isolation sleeve in a staggered mode. The staggered arrangement referred to herein may refer to ordered staggering or unordered staggering.

As a preferred embodiment, the first thermal response assembly may include two elastic compressible members respectively disposed on two opposite sides of the movable magnetic member and respectively having free ends away from the side on which the movable magnetic member is disposed. The elastic potential energy in two directions can further enhance the high-frequency vibration generated by the movable magnetic part.

Preferably, the phase change portion may be made of a phase change material. Preferably, the phase change part may be prepared by mixing a phase change material and nanoscale iron powder dedicated to magnetic shielding. The phase change material is used for realizing the conversion of the phase change part form, and when the phase change part form is solid, the special iron powder for magnetic shielding plays a role in shielding a magnetic field between the movable magnetic piece and the fixed magnetic piece. When the phase transition portion is in a liquid state, the iron powder dedicated for magnetic shielding is dispersed, and the magnetic field shielding effect on the movable magnetic material and the fixed magnetic material is removed.

Preferably, the clad layer may be made of an elastic heat conductive material capable of transferring external heat to the phase change part. Preferably, the coating layer may be made of an elastic heat insulating material, and the temperature change of the phase change part is not affected by external heat.

Because criss-cross reinforcing steel bars are formed inside the casting, after the tamping device 8 is operated to insert the reinforcing steel bars into the casting, the tamping device 8 is surrounded between the reinforcing steel bars, and the movable magnetic part is not only influenced by the suction force of the fixed magnetic part, but also influenced by the reinforcing steel bars surrounding the outer side of the tamping device 8, so that the high-frequency vibration effect generated by the wall-mounted tamping assembly 2 is enhanced. Furthermore, in order to enhance the tamping effect of the tamping unit 8, it is generally necessary to lift and lower the tamping unit 8 back and forth, so that the distribution of the reinforcing bars around the exterior of the tamping unit 8 is relatively variable, which also results in the movable magnetic element being subjected to a varying rather than fixed external influence, so that by means of the variation of the distribution of the external reinforcing bars caused by the lifting and lowering of the tamping unit 8 within the casting, the unsteadiness of the movable magnetic element is further enhanced, further enhancing the high-frequency vibratory effect generated by the wall-mounted tamping assembly 2.

At least a second thermal response component for adsorbing and discharging residual gas in pouring is arranged in a cavity of the wall tamping component 2. The second thermally responsive member is connectable to the environment external to the tamping unit 8 via a first vent opening in the wall of the wall mounted tamping unit 2. The second thermally responsive component has an insulating inner layer and a responsive layer.

An interlayer space is formed between the response layer and the isolation inner layer and can be communicated with an inner layer air cavity formed by the isolation inner layer coated on the first vent hole.

The second thermally responsive member is formed with a selectively permeable membrane over the first vent hole that allows passage of gas but not passage of liquid or solid.

The volume of the interlayer space can be changed by regulating the form of the response layer relative to the isolation inner layer, so that gas can be selectively sucked or exhausted through the first vent hole.

The isolating inner layer can be made of a material with a non-convertible shape or a material with a restorable deformation.

Specifically, after the tamping device 8 is placed in the casting, the casting covers the outer wall of the first vent hole, so that the first vent hole is temporarily isolated from the external environment. At this time, the shape of the response layer can be regulated and controlled, so that the volume of the interlayer space is increased. Because the interlayer space is communicated with the outside only through the first vent hole, and the first vent hole is relatively closed by the coating of the pouring object which cannot pass through the first vent hole, the volume of the interlayer space is increased, and the interlayer space and the limited gas in the isolation inner layer form a negative pressure state. The negative pressure condition may be used to force gas located outside the first vent hole inwardly into the interior of the second thermally responsive assembly.

Under the condition that partial gas in the casting is forced into the second thermal response component, the shape of the response layer can be continuously regulated, so that the continuous negative pressure state in the second thermal response component can be maintained. The second thermally responsive member can therefore continue to effectively adsorb gases within the casting.

In the prior art, as proposed in patent document No. CN107905539B, a concrete tamping and mixing device is disclosed, which discloses a method for exhausting gas from inside of concrete, which is currently used in most tamping devices, that is, a through hole is formed on an outer wall of a tamping device with a single cylinder structure, and the gas to be tamped can be exhausted from outside through the through hole by means of vibration generated by the tamping device or lifting and lowering processes, although a passage for the gas is provided, but the problem is that even if the gas is located at a position adjacent to the through hole, the gas itself will not actively move toward the inside of the through hole, so the tamping device in this technical scheme actually has only a single function of tamping, and has little auxiliary effect on gas exhaust. To this, although also there is the relevant research to propose at the inside technical scheme who forms piston structure of tamping unit, piston structure can make the inside negative pressure environment that forms of through-hole, provides the effect of adsorbed gas, however piston structure weight is great, has increased tamping unit's whole weight, is unfavorable for tamping unit's tamping effect, and tamping unit's inside cavity is great, if through piston structure at the inside negative pressure environment that forms of tamping unit, then need the longer distance's of piston structure removal, require tamping unit to need to set up bigger size in length direction.

Compare above-mentioned prior art, the tamping unit that this application provided directly sets up negative pressure environment on extending to the inside wall of concreting and putting tamping subassembly 2, can form the negative pressure environment on a plurality of different positions through the mode that sets up a plurality of wall and put tamping subassembly 2, and the realization of negative pressure environment is easier on the one hand, and the temperature that directly utilizes the concreting can make and form negative pressure environment, active adsorbed gas. And the distributed negative pressure environments are mutually independent, so that even if a single wall tamping assembly 2 fails to form a negative pressure environment, the normal work of other wall tamping assemblies 2 cannot be influenced. The negative pressure environment is relatively small and is more easily formed. On the other hand, most of the gas required to be exhausted from the casting is directly lifted to the external environment from the interior of the casting to be exhausted under the tamping action, so that the gas required to be adsorbed and exhausted by the tamping device through the through holes is less and dispersed, the negative pressure environment formed by the tamping device is closer to the interior of the casting, the gas adsorption range is radially extended, and the tamping device is more suitable for adsorbing and exhausting the less and dispersed gas.

Preferably, the first vent hole out of the envelope of the casting is capable of communicating directly with the external environment/air outside the casting after the tamper is placed in the casting, thereby relieving the negative pressure condition inside the second thermally responsive assembly. At the moment, the shape of the response layer can be regulated and controlled, so that the volume of the interlayer space is reduced, the gas in the interlayer space is forced to be output from the first vent hole, and the response layer is restored to the original shape. In this arrangement, the gas absorbed into the second thermally responsive component can be exhausted to its external environment after a single tamping operation, thereby preventing it from exhausting gas back into the casting. In the technical scheme of arranging the piston type structure in the tamping device, related researches propose that an additional oxygen consumption part is arranged on the tamping device, and the gas sucked into the tamping device is consumed by chemical reaction or generates additional heat. Compared with the prior art, the tamping device provided by the application does not need to maintain a negative pressure environment through gas consumption, so that the tamping device can be repeatedly adsorbed and discharged, can be repeatedly used, and has a longer service cycle.

Preferably, the second thermally responsive assembly may be provided at a location corresponding to the second end of the wall tamping assembly 2. The second thermally responsive component is disposed within the insulating sleeve. The second thermally responsive component may extend into the interior of the casting.

Preferably, the spacer sleeve is a double-layer structure. The isolation sleeve is provided with an inner isolation sleeve and an outer isolation sleeve, and the interlayer space is reserved between the inner isolation sleeve and the outer isolation sleeve. The interlayer space referred to in this application is understood to be the space between the inner and outer insulating sleeves.

This inlayer spacer sleeve and outer spacer sleeve can be located on the wall puts tamping subassembly 2 according to following mode respectively: one end of the isolation sleeve is annularly connected to the outer side of the mounting hole 5 around the circumferential direction of the mounting hole 5; the other end of the spacer sleeve is annularly connected to the outer side of the wall tamping assembly 2. The inner and outer isolation sleeves are foldable rubber telescopic sleeves, and a plurality of folding parts are arranged in the folding direction of the inner and outer isolation sleeves. The inner and outer insulating sleeves may be folded or unfolded together with the movement of the wall tamping assembly 2 as the wall tamping assembly 2 is moved from the mounting hole 5 to the exterior or interior of the first cylinder 3.

The outer layer isolation sleeve is provided with the first vent hole. The responsive layer of the second thermally responsive member is an inflatable bladder structure. One end of the response layer of the second thermal response component is connected to the outer wall of the first cylinder 3, which is provided with the second vent hole. The second vent is arranged on the outer wall of the first cylinder 3 between the inner and outer isolation sleeves. The second vent hole is used for enabling the air inside the expansion bag structure/response layer to enter and exit.

The change of the shape of the expansion capsule structure/response layer refers to the expansion or contraction and deflation of the expansion capsule structure/response layer. The balloon structural/responsive layer may be made of a shape memory material. Preferably, at relatively high temperatures, the bladder structure/responsive layer folds to collapse, causing the volume of the bladder structure/responsive layer to decrease. Preferably, upon transition to a relatively low temperature state, the balloon structure/responsive layer expands to expand, causing the balloon structure/responsive layer to increase in volume.

Preferably, the balloon structure/responsive layer may be provided with a heating portion. The form of the response layer is regulated and controlled by the temperature rise or the temperature fall of the heating part. The heating portion may be a thermally conductive wire arranged on or within the responsive layer in a meandering manner, or a thermally conductive layer arranged on or within the responsive layer at least partially covering it. The response layer has at least a first form and a second form that are mutually converted by controlling the temperature of the heating portion.

As a preferred embodiment, the spacer sleeve may be included as part of the wall tamping assembly 2 for ease of description. For example, the spacer is the outermost structure of the wall tamping unit 2. The wall tamping assembly 2 has a flexible, outermost spacer sleeve. Preferably, the first thermal response component in the shape of an elongated strip is wrapped in the isolation sleeve. Preferably, the inner and outer sleeve structures which are long strips are wrapped in the isolation sleeve. Preferably, to avoid redundancy, references herein to terms such as "balloon structure/responsive layer" refer to either the balloon structure or the responsive layer. Preferably, the inner and outer sleeve structures may be considered part of the first thermally responsive assembly, and thus the first thermally responsive assembly/inner and outer sleeve structures are referred to hereinafter as the inner and outer sleeve structures.

The ends of the spacer sleeve are attached to the outer wall of the first barrel 3 and the ends of the first thermally responsive assembly/inner and outer sleeve structure, respectively. When the first thermal response assembly/inner and outer sleeve structure is stretched/moved back and forth along the mounting hole 5 formed on the first cylinder 3, the isolation sleeve is stretched/folded back and forth.

The insulating inner layer of the second thermally responsive component may be a number of bulge-like shells. The bulge-shaped shell is reversely buckled and relatively fixed on the position of the isolation sleeve, which is provided with the through hole. The arrangement of the bulge-shaped shell does not influence the expansion and folding of the isolation sleeve. Preferably, the bulge-like housing herein may be made of a material that is deformable but automatically restores its original shape after removal of an external force forcing its deformation. The isolation inner layer is formed in the interlayer space of the isolation sleeve.

Preferably, the spacer sleeve has a hardness that is not easily deformed. For example, the spacer sleeve may be made from natural rubber, fluororubber, nitrile rubber, or the like. Therefore, when the response layer expands to form a negative pressure environment between the response layer and the isolation sleeve, the isolation sleeve cannot deform to damage the negative pressure environment.

Specifically, after the tamping device is placed in the casting, the casting is coated on the outer wall of the first vent hole, so that the first vent hole is temporarily isolated from the external environment. The expansion bladder structure/responsive layer may then be transitioned to a higher temperature, toward a deflated state, by adjusting the temperature of the heated portion. So that the volume of the interlayer space increases. Because the interlayer space is communicated with the outside only through the first vent hole, and the first vent hole is relatively closed by the coating of the pouring object which cannot pass through the first vent hole, the volume of the interlayer space is increased, and the interlayer space and the limited gas in the isolation inner layer form a negative pressure state. The negative pressure condition may be used to force gas located outside the first vent hole inwardly into the interior of the second thermally responsive assembly. Conversely, after the tamping device is withdrawn from the casting, the first vent hole is in communication with the external environment. The expandable bladder structure/responsive layer may now be transitioned to an expanded, expanded state by adjusting the temperature of the heated portion to transition to a lower temperature. So that the volume of the interlayer space is reduced. Because the interlayer space is communicated with the outside only through the first vent hole, the reduction of the volume of the interlayer space enables trapped gas in the interlayer space and the isolation inner layer to be discharged from the first vent hole.

The second cylinder 4 is coupled to the wall tamping unit 2. The second cylinder 4 is relatively rotatable within the first cylinder 3. The second cylinder 4 is operatively associated with the wall tamping assembly 2 to move the wall tamping assembly 2 back and forth relative to the mounting hole 5. The coupling relationship mentioned herein may refer to a linkage connection or a transmission connection with each other through other components.

The system further comprises a drive connection assembly 7, which is arranged in the inter-cartridge gap 6. The drive connection assembly 7 comprises at least one distribution gear 17. The supporting member 9 of the first thermal response assembly is provided with a transmission groove 10, one of two sides of the transmission groove 10, which are opposite to each other, is provided with a rack shape, and the other side is provided with a plane shape. The distribution gear 17 is connected to the inside of the power transmission groove 10 such that its tooth surface simultaneously engages with one side of the power transmission groove 10 having a rack shape and abuts against the other side having a flat shape. The position of the distribution gear 17 in the tamper arrangement is relatively fixed. So that when the distribution gear 17 is forced to spin, the distribution gear 17 will move the support 9 back and forth with the wall tamping assembly 2.

Preferably, the driving groove 10 may be opened on the vertical top surface 11 of the support 9. Preferably, the driving groove 10 may be opened on the vertical bottom surface 12 of the support 9. To prevent the distribution gear 17 from coming out of the meshing engagement with the transmission groove 10, both ends of the transmission groove 10 in the extending direction of the rack-shaped side face thereof are closed ends. The drive connection assembly 7 furthermore comprises a transmission rod 13 which is fixedly arranged on the distribution gear 17. The transmission rod 13 is fixed to the non-tooth surface of the distribution gear 17 with one end thereof perpendicular to the non-tooth surface. The drive rod 13 serves to fix the position of the distribution gear 17 relative to one another in the tamper arrangement.

The inner wall of the first cylinder 3 can be fixedly provided with a mounting surface 14 positioned on one side of the distribution gear 17 in the vertical direction, and the mounting surface 14 extends from the inner wall of the first cylinder 3 to the center of the first cylinder 3. Preferably, the inner wall of the first cylinder 3 is fixedly provided with a mounting surface 14 above the distribution gear 17. The mounting face 14 is parallel to the non-toothed surface of the distribution gear 17. One end of the transmission rod 13 extends away from the distribution gear 17 and is connected to the mounting surface 14 in a non-detachable manner. The transmission rod 13 can rotate relative to the mounting surface 14 but is fixed in position relative to the vertical direction.

The second cylinder 4 comprises at least a central cylinder 15 and a central gear 16. The center cylinder 15 is provided in the first cylinder 3 such that the cylinder extending direction thereof is parallel to the first direction, and the center gear 16 is provided at one end of the center cylinder 15 such that the non-gear surface thereof is perpendicular to the first direction. Preferably, a central gear 16 is provided with a central cylinder 15 on each side in the first direction to achieve relative fixation thereof in the first cylinder 3. The center cylinder 15 located below the sun gear 16 may be rotatably connected to the bottom surface of the first cylinder 3 in an inseparable manner. The central cylinder 15, which is located above the central gear 16, may be connected to a drive motor.

The sun gear 16 is provided in the first cylinder 3 in such a manner that it meshes with the distribution gear 17. Preferably, a plurality of distributed gears 17 are arranged at intervals around the circumference of the central gear 16, and a single central gear 16 can synchronously drive a plurality of wall tamping assemblies 2 to extend into the casting to assist tamping.

Preferably, the second cylinder 4 may be provided with a plurality of sun gears 16 arranged side by side with each other in the first direction, and correspondingly the wall tamping assembly 2 may be arranged in multiple layers in the first direction of the outer cylinder drive. And a central cylinder 15 is arranged between every two central gears 16 at intervals to realize the connection and fixation between the two central gears.

The built-in tamping assembly 1 comprises a transmission shaft and a polarization rotor. The transmission shaft runs through the inside of the second cylinder 4, the top end of the transmission shaft is connected to the driving motor, and the bottom end of the transmission shaft is provided with the polarization rotor so as to realize the main vibration function of the tamping device.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents. The present description contains several inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", each indicating that the respective paragraph discloses a separate concept, the applicant reserves the right to submit divisional applications according to each inventive concept. Throughout this document, the features referred to as "preferably" are only an optional feature and should not be understood as necessarily requiring that such applicant reserves the right to disclaim or delete the associated preferred feature at any time.

Claims (10)

1. A bored pile matrix control system, comprising at least:

a first cylinder (3); and

a built-in tamping component (1) arranged in the first cylinder (3),

its characterized in that, drilling bored concrete pile matrix volume control system still includes wall and puts tamping subassembly (2), wall is put tamping subassembly (2) and is included:

a first thermally responsive component mounted on the outer wall of the first cylinder (3) in such a way that it is at least partially surrounded by the insulating sleeve to insulate it from the external environment;

a second thermally responsive member mounted on the outer wall of the first cylinder (3) in such a way that it is at least partially surrounded by the insulating sleeve so as to be able to communicate with the external environment,

when the wall tamping assembly (2) enters the casting and is started up in a hot mode, the second thermal response assembly can form a negative pressure environment in the isolation sleeve and can form a gas adsorption effect on the casting, wherein the gas adsorption effect is enhanced by the excitation effect of the first thermal response assembly, which is excited by the hot start, in the negative pressure environment.

2. A bored pile matrix control system according to claim 1, wherein the first thermally responsive assembly is configured such that its excitation, activated when the wall tamper assembly (2) enters a casting and is thermally activated, is variable in response to a change in the position of the first barrel (3) in the pile foundation within which the reinforcement cage is at least partially surrounded by the casting.

3. A bored pile matrix amount control system according to claim 2, wherein the spacer sleeve is provided in a collapsible manner on the outer wall of the first cylinder (3) and has an inner and an outer spacer sleeve, wherein an interlayer space for forming the negative pressure environment is reserved between the inner and the outer spacer sleeve, which is communicable to the external environment through at least one first vent hole provided on the outer spacer sleeve.

4. A bored pile matrix control system according to claim 3, wherein the first thermally responsive member comprises at least a responsive layer capable of being form-converted in response to entering the casting and being thermally activated by the wall tamper assembly (2) to change the effective spatial volume of the interlayer space formed between the inner and outer spacer sleeves.

5. The bored pile matrix amount control system according to claim 4, wherein the first thermal response unit further includes at least one isolation inner layer provided on an inner wall of the outer spacer sleeve in such a manner as to surround the at least one first vent hole provided in the outer spacer sleeve, respectively, and such that a sandwich space between the inner and outer spacer sleeves is always not less than a sum of surrounding spaces formed between the plurality of isolation inner layers and the outer spacer sleeve, or a difference from the sum of surrounding spaces formed between the plurality of isolation inner layers and the outer spacer sleeve always satisfies a threshold range.

6. Bored pile matrix control system according to claim 5, characterized in that the first cylinder (3) is insertable into the casting in its first dimension in radial direction and is convertible to the second dimension after insertion by means of adjusting the relative position of the wall tamping assembly (2) on the first cylinder (3).

7. A bored pile matrix amount control system according to claim 6, wherein the local space defined by the reinforcement bars formed with respect to the first cylinder (3) is changed by adjusting the relative position between the first cylinder (3) suspended in the pile foundation and the reinforcement cage assembled in the pile foundation, and the wall tamping unit (2) is magnetically influenced by the reinforcement bars surrounding the first cylinder (3) so that the excitation excited when the wall tamping unit (2) enters the casting and is thermally activated is enhanced.

8. The bored pile matrix amount control system according to claim 7, wherein the first cylinder (3) has a cavity and a second cylinder (4) is sleeved in the cavity of the first cylinder (3) in a manner that the length extension direction of the second cylinder coincides with the length extension direction of the first cylinder (3), and an inter-cylinder gap (6) is reserved between the second cylinder (4) and the first cylinder (3).

9. The bored pile matrix amount control system according to claim 8, wherein a projection area of the wall tamping assembly (2) on a projection plane perpendicular to a length extension direction of the first cylinder (3) is associated to a projection area of the first cylinder (3) and the second cylinder (4) on the projection plane.

10. A control method for matrix quantity of a bored pile is characterized by at least comprising the following steps:

when the wall tamping component (2) is placed into a casting, the wall tamping component (2) is regulated and controlled to be started thermally;

under the hot start environment, the second thermal response assembly forms a negative pressure environment in the isolation sleeve;

under the negative pressure environment, the gas adsorption effect formed by the casting is enhanced by the excitation effect of the first thermal response assembly excited by the hot start.

Images