Separable pile tip casing support structure and separation construction method thereof

Abstract

The present invention discloses a detachable pile tip type casing support structure and a detachable construction method thereof, the detachable pile tip type casing support structure comprises a casing, a pile tip and a chain rope, the casing pile tip is formed by splicing two pile tip bodies, the two pile tip bodies are connected to each other by a connecting piece and can be rotatably connected relative to each other, and a locking part is provided on the connecting piece for preventing the two pile tip bodies from rotating relative to each other after being spliced ​​and connected together, and the two pile tip bodies are respectively provided with a clamping part on the side facing away from the tip, and the two clamping parts are combined to form a clamping groove when the two pile tip bodies are spliced ​​and connected, so that the casing can be detachably clamped, and the chain rope is connected between one of the pile tip bodies and the casing, and can enable the pile tip to remain connected to the casing when separated from the casing, and can provide space for the two pile tip bodies to rotate relative to each other. The present invention can separate the pile tip from the casing, better complete the casing construction, and ensure that there is no sediment, soil accumulation, etc. in the casing.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation treatment and pile foundation construction, and in particular to a detachable pile tip type casing support structure and a detachable construction method thereof. Background Art

[0002] During the foundation treatment construction or pile foundation construction process, due to the different construction processes, the requirements for the casing construction process are also different. In the existing casing construction process, drilling is performed through the pile tip fixedly connected to the casing. After the drilling is completed, the pile tip is a complete structure, and the overall diameter of the pile tip is slightly larger than the outer diameter of the casing. Therefore, there is a problem that the pile tip cannot be separated from the casing. The conventional operation is to lift the casing and the pile tip fixedly connected to the casing out of the pile hole as a whole, and then re-bury the casing into the pile hole. This construction process requires large-scale lifting machinery to operate, and the construction process is relatively cumbersome. In addition, during the process of re-burying the casing into the pile hole, sediment and soil are easily dropped into the casing, which affects the subsequent construction of the pile body. Summary of the Invention

[0003] In order to overcome the defects in the prior art, the present invention provides a detachable pile tip type casing support structure and a detachable construction method thereof, so as to better complete the casing construction and ensure that there is no sediment, soil accumulation, etc. in the casing.

[0004] In order to achieve the above object, the present invention provides a detachable pile tip type casing support structure, comprising:

[0005] A casing, wherein the bottom of the casing is provided with a first connecting end;

[0006] The pile tip is formed by splicing two pile tip bodies, the two pile tip bodies are connected by a connecting piece so as to be relatively rotatable. The connecting piece is provided with a locking portion for preventing the two pile tip bodies from rotating relative to each other after being spliced ​​together. The two pile tip bodies are respectively provided with a clamping portion on the side facing away from the tip. The two clamping portions are combined to form a clamping groove when the two pile tip bodies are spliced ​​together to allow the casing to be detachably clamped. One of the pile tip bodies is provided with a second connecting end.

[0007] A chain, one end of which is fixedly connected to the second connection end, and the other end of which is detachably connected to the first connection end, and a length of the chain is greater than a distance between the first connection end and the second connection end when the pile tip and the casing are in a locked state, so that the pile tip can remain connected to the casing when separated from the casing, and space can be provided for the two pile tip bodies to rotate relative to each other.

[0008] Preferably, a plurality of slot back ribs are fixedly connected between each of the clamping portions and the corresponding pile tip body.

[0009] Preferably, the connecting member includes two first connecting ear plates respectively fixedly connected to the two pile tip bodies at positions relatively close to the splicing position and fixing bolts inserted into the two first connecting ear plates. The fixing bolts are inserted into the two first connecting ear plates and are used to cooperate with the locking portion to lock the two pile tip bodies after splicing and connecting them, so as to prevent the two from rotating relative to each other.

[0010] Preferably, the side end surface of one of the pile tip bodies is provided with a convex buckle protruding from the side end surface at the splicing portion, and the side end surface of the other pile tip body is correspondingly provided with a groove for the convex buckle to be inserted and connected at the splicing portion.

[0011] Preferably, a second connecting ear plate for fixedly connecting the other end of the chain is fixedly mounted on a surface of one of the pile tip bodies facing away from the drill bit.

[0012] A separation construction method for a detachable pile tip type casing support structure is provided, wherein the detachable pile tip type casing support structure is separated from the casing, and the separation construction method comprises the following steps:

[0013] The two pile tip bodies are spliced ​​and connected to form a pile tip, and the two spliced ​​and connected pile tip bodies are locked by a locking portion to prevent the two from rotating relative to each other;

[0014] One of the pile tip bodies is connected to the casing by a chain, and the casing is connected to the pile tip by snapping together the slot formed when the two pile tip bodies are spliced ​​together to form a closed whole;

[0015] The pile hole is formed by drilling the whole body after being snap-connected, and the casing is pulled up after the drilling is completed, so that the casing is relatively separated from the pile tip due to the friction force with the inner wall of the pile hole, and under the action of the chain, the pile tip and the casing are separated by a certain distance and remain connected;

[0016] The locking portion releases the lock on the relative rotation of the two pile tip bodies, and one of the pile tip bodies is lifted by the chain, so that the two pile tip bodies rotate relative to each other and deflect as a whole around the second connecting end, thereby making the width and length of the two pile tip bodies as a whole in the horizontal plane smaller than the inner diameter of the casing;

[0017] Remove the other end of the chain from the casing and continue to pull the chain until the two pile tip bodies pass through the casing and are separated from the casing.

[0018] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0019] One of the pile tip bodies can be lifted by pulling the chain. During the lifting process, the other pile tip body is lifted by the fixing bolt, and by loosening the locking part, the two pile tip bodies are allowed to rotate relative to each other, and finally the pile tip is separated from the casing by pulling the chain, ensuring that there is no sediment or soil accumulation in the casing. The operation is convenient, the operability of the construction process is improved, the waste of machinery and resources is reduced, and the construction efficiency is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 2 is a schematic structural diagram of a detachable pile tip casing support structure according to an embodiment of the present invention.

[0022] Figure 2 Schematic diagram of two pile tip bodies after relative rotation in an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram showing the principle of lifting two pile tip bodies to rotate relative to each other and separate them from the casing in an embodiment of the present invention.

[0024] The corresponding relationship of the reference numbers in the accompanying drawings is as follows:

[0025] 1- casing; 2- pile tip body; 21- first pile tip body; 22- second pile tip body; 201- drill bit; 202- slot; 203- slot back rib; 204- first connecting lug; 205- second connecting lug; 206- buckle; 207- groove; 3- chain; 4- fixing bolt; A- position of the free end of the pile tip body before lifting; B- position of the free end of the first pile tip body after lifting and rotation; B1- position of the free end of the second pile tip body after lifting and rotation; a- direction of rotation of the first pile tip body; b- direction of rotation of the second pile tip body; H- distance between the outer end points when the pile tip bodies are spliced; h- distance between the outer end points after lifting and rotation; O- center of rotation of the two pile tip bodies when they rotate relative to each other. DETAILED DESCRIPTION

[0026] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0027] See also Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a detachable pile tip type casing support structure, comprising a casing 1, a pile tip, and a chain 3, wherein the pile tip is detachably mounted on the casing 1, a first connecting end is provided at the bottom of the casing 1, the pile tip is formed by splicing two pile tip bodies 2, the two pile tip bodies 2 are relatively rotatably connected by a connecting member, and the connecting member is provided with a locking portion for preventing the two pile tip bodies 2 from rotating relative to each other after being spliced ​​and connected together. The two pile tip bodies 2 are respectively provided with a clamping portion on the side facing away from the tip, and the two clamping portions are combined to form a clamping groove 202 when the two pile tip bodies 2 are spliced ​​and connected, so that the casing 1 can be detachably mounted, and one of the pile tip bodies 2 is provided with a second connecting end; one end of the chain 3 is fixedly connected to the second connecting end, and the other end is detachably connected to the first connecting end. The length of the chain 3 is greater than the distance between the first connecting end and the second connecting end when the pile tip and the casing 1 are in the engaged state, so that the pile tip can remain connected to the casing 1 when separated from the casing 1, and space for relative rotation of the two pile tip bodies 2 can be provided. It should be noted that in this embodiment, the pile tip body 2 is in the shape of a solid cone, and the tip is a drill bit 201. The drill bit 201 adopts a diamond drill bit. The use of a diamond drill bit can ensure that hard stones such as crusher rocks are broken during drilling. The connection part between the slot 202 and the casing 1 is set to a slope type to ensure that the casing 1 can be smoothly engaged and connected to the slot 202.

[0028] Furthermore, in this embodiment, a plurality of retaining grooves and back ribs 24 are fixedly connected between each engaging portion and the corresponding pile tip body 2 to prevent deformation and damage due to stress. Preferably, the connecting member includes first connecting lugs 204 fixedly connected to the two pile tip bodies 2 at positions relatively close to the joint, and fixing bolts 4 inserted into the two first connecting lugs 204. The fixing bolts 4 are inserted into the two pile tip bodies 2 and are used to cooperate with the locking portion to lock the two pile tip bodies 2 after splicing and connecting, thereby preventing relative rotation between the two. It should be noted that in this embodiment, the locking portion can be a nut that matches the fixing bolt 4. By loosening the fixing bolt 4 and the nut, one pile tip body 2 can be rotated counterclockwise relative to the other pile tip body 2.

[0029] Furthermore, the side surface of one of the pile tip bodies 2 is provided with a protruding buckle 206 protruding from the side surface at the joint, while the side surface of the other pile tip body is provided with a corresponding groove 207 for the protruding buckle 206 to be inserted and connected. In this embodiment, the protruding buckle 206 is semi-cylindrical and located at the upper portion of the side surface of one of the pile tip bodies 2. Correspondingly, the groove 207 is also semi-cylindrical and located at the upper portion of the side surface of the other pile tip body 2. This ensures that when the two pile tip bodies 2 rotate relative to each other, they will not affect each other. Preferably, a second connecting lug 205 is fixedly mounted on the surface of one of the pile tip bodies 2 facing away from the drill bit 204, to which the other end of the chain 3 is fixedly connected.

[0030] See also Figure 1 As shown, in this embodiment, the pile tip is composed of a first pile tip body 21 and a second pile tip body 22 that are rotatably connected. The side end surface of the first pile tip body 21 is provided with a protruding buckle 206 protruding from the side end surface at the joint, and the side end surface of the second pile tip body 22 is provided with a corresponding groove 207 for the protruding buckle 206 to be inserted and connected. Preferably, a second connecting ear plate 205 for fixedly connecting the other end of the chain 3 is fixedly mounted on the surface of the first pile tip body 21 facing away from the drill bit.

[0031] The embodiment of the present invention further provides a method for separating the detachable pile tip type casing support structure, wherein the detachable pile tip type casing support structure is separated from the casing. The separation construction method comprises the following steps:

[0032] The two pile tip bodies are spliced ​​and connected to form a pile tip, and the two spliced ​​and connected pile tip bodies are locked by a locking portion to prevent relative rotation between the two pile tip bodies;

[0033] Connect one of the pile tip bodies (the first pile tip body in this embodiment) to the casing through a chain, and engage the casing with the pile tip through a clamping groove formed when the two pile tip bodies are spliced ​​together to form a closed whole.

[0034] The pile hole is formed by drilling the whole body after being snap-connected, and the casing is pulled up after the drilling is completed, so that the casing is relatively separated from the pile tip due to the friction force with the inner wall of the pile hole, and under the action of the chain, the pile tip and the casing are separated by a certain distance and remain connected;

[0035] The locking portion unlocks the relative rotation of the two assembled pile tips, and one of the pile tip bodies (the first pile tip body in this embodiment) is lifted by the chain, causing the two pile tip bodies to rotate relative to each other and deflect as a whole around the second connecting end, thereby making the width and length of the two pile tip bodies as a whole in the horizontal plane smaller than the inner diameter of the casing;

[0036] Remove the other end of the chain from the casing and continue to pull the chain until the two pile tip bodies pass through the casing and are completely separated from the casing.

[0037] See also Figures 1 to 3 As shown, Figure 1 The position of the two pile tip bodies before the pile tip body is lifted (label A represents the position of the end points of the pile tip body in the horizontal state). At this position, the distance between the outer end points of the pile tip bodies when they are spliced ​​together is H. Figure 2is the position of the first pile tip body and the second pile tip body after the lifting rotation (label B represents the position of the end point of the first pile tip body after rotating in the direction a, and B1 represents the position of the end point of the second pile tip body after rotating in the direction b), as shown in FIG. Figure 3 As shown, the first pile tip body 21 is lifted by the chain, and the first pile tip body 21 rotates in direction a to position B around the rotation center relatively fixed by the fixing bolts (label O represents the rotation center when the two pile tip bodies rotate relative to each other). The second pile tip body 22 rotates in direction b to position B1 around the rotation center relatively fixed by the fixing bolts. At this time, the distance between the outer end points is h, which is smaller than the inner diameter of the casing. At this time, the entire body deflects around the second connecting end (i.e., the connection between the chain and the second connecting ear plate), so that the width and length of the entire body of the two pile tip bodies in the horizontal plane are both smaller than the inner diameter of the casing. Therefore, the two pile tip bodies can pass through the casing and be completely separated from the casing.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A detachable pile tip casing support structure, characterized in that: include: A casing, wherein the bottom of the casing is provided with a first connecting end; The pile tip is formed by splicing two pile tip bodies, the two pile tip bodies are connected by a connecting piece so as to be relatively rotatable. The connecting piece is provided with a locking portion for preventing the two pile tip bodies from rotating relative to each other after being spliced ​​together. The two pile tip bodies are respectively provided with a clamping portion on the side facing away from the tip. The two clamping portions are combined to form a clamping groove when the two pile tip bodies are spliced ​​together to allow the casing to be detachably clamped. One of the pile tip bodies is provided with a second connecting end. A chain, one end of which is fixedly connected to the second connecting end, and the other end of which is detachably connected to the first connecting end, and a length of the chain is greater than a distance between the first connecting end and the second connecting end when the pile tip and the casing are in a locked state, so that the pile tip can remain connected to the casing when separated from the casing, and space can be provided for the two pile tip bodies to rotate relative to each other.

2. The detachable pile tip casing support structure according to claim 1, characterized in that: A plurality of slot back ribs are fixedly connected between each of the clamping portions and the corresponding pile tip body.

3. The detachable pile tip casing support structure according to claim 2, characterized in that: The connecting member includes first connecting ear plates respectively fixedly connected to the two pile tip bodies at positions relatively close to the splicing position and fixing bolts inserted into the two first connecting ear plates. The fixing bolts are inserted into the two first connecting ear plates and are used to cooperate with the locking portion to lock the two pile tip bodies after splicing and connecting them, so as to prevent the two from rotating relative to each other.

4. The detachable pile tip casing support structure according to claim 1, characterized in that: The side end surface of one of the pile tip bodies is provided with a convex buckle protruding from the side end surface at the splicing position, and the side end surface of the other pile tip body is correspondingly provided with a groove for the convex buckle to be inserted and connected at the splicing position.

5. The detachable pile tip casing support structure according to claim 1, characterized in that: A second connecting ear plate for fixedly connecting the chain is fixedly mounted on a surface of one of the pile tip bodies facing away from the tip.

6. A separation construction method for a detachable pile tip casing support structure, characterized in that: The separation of the pile tip and the casing is achieved by the detachable pile tip casing support structure as claimed in claim 1, and the separation construction method includes the following steps: The two pile tip bodies are spliced ​​and connected to form a pile tip, and the two spliced ​​and connected pile tip bodies are locked by a locking portion to prevent relative rotation between the two pile tip bodies; One of the pile tip bodies is connected to the casing by a chain, and the casing is connected to the pile tip by snapping together the slot formed when the two pile tip bodies are spliced ​​together to form a closed whole; The pile hole is formed by drilling the whole body after being snap-connected, and the casing is pulled up after the drilling is completed, so that the casing is relatively separated from the pile tip due to the friction force with the inner wall of the pile hole, and under the action of the chain, the pile tip and the casing are separated by a certain distance and remain connected; The locking portion releases the lock on the relative rotation of the two pile tip bodies, and one of the pile tip bodies is lifted by the chain, so that the two pile tip bodies rotate relative to each other and deflect as a whole around the second connecting end, thereby making the width and length of the two pile tip bodies as a whole in the horizontal plane smaller than the inner diameter of the casing; Remove the other end of the chain from the casing and continue to pull the chain until the two pile tip bodies pass through the casing and are completely separated from the casing.

Images