Occlusion cast-in-situ bored pile structure and construction method

Abstract

The invention discloses an occluded cast-in-situ bored pile structure and a construction method, and belongs to the technical field of building construction.The occluded cast-in-situ bored pile structure comprises sequential piles A and sequential piles B. A base layer is arranged on the outer sides of the sequential piles A and the sequential piles B. A rock stratum is arranged at the bottom of the base layer. Arc-shaped meshing grooves are longitudinally formed in the corresponding side walls of the sequential piles A and the sequential piles B, pile holes formed in the base layer are formed between the arc-shaped meshing grooves, sleeves are placed on the inner sides of the pile holes, supporting hoops abutting against the inner diameters of the pile holes are fixedly connected to the tops of the outer walls of the sleeves, notches are formed in the supporting hoops, and the outer walls of the sleeves are fixedly connected with the outer walls of the supporting hoops. Lifting lugs are symmetrically installed on the top of the sleeve, the secant pile is poured on the inner side of the sleeve, a reinforcement cage is placed on the inner side of the secant pile, the residual quantity of mud at the bottom of a pile hole can be effectively reduced, and the overall bearing capacity of the secant pile is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and more particularly to an interlocking bored pile structure and a construction method. Background Art

[0002] Bored interlocking cast-in-place piles refer to continuous retaining support structures with anti-seepage effects formed by closely arranged pile bodies and intersecting adjacent pile bodies. This support structure can be made entirely of reinforced concrete piles, or it can be made of plain concrete piles and reinforced concrete piles arranged alternately. This pile is generally constructed using a full set of pipe pile machines, with deep holes, low vibration, low noise, no need for mud wall protection, and stable pile quality. The adjacent concrete piles are partially embedded in the circumference to form an overall continuous retaining support structure with good anti-seepage effects. Under the same geological conditions, it has obvious price advantages compared with traditional retaining structure methods such as underground continuous walls, bored piles plus water-stop curtains, etc.

[0003] In the existing interlocking bored pile structure, after the finished pile is cut to form an interlocking groove, soil is taken out with a grab bucket to form a pile hole, and then pipes are lowered, a steel cage is installed and concrete is poured in the pile hole. Since the mud at the bottom of the hole is mainly pressed out by the falling concrete, this method will cause too much mud to remain at the bottom of the hole, affecting the overall bearing capacity of the bored pile. Therefore, we propose an interlocking bored pile structure and construction method to solve the above-mentioned problems. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an interlocking bored pile structure and a construction method, which can effectively reduce the residual amount of mud at the bottom of the pile hole and ensure the overall bearing capacity of the interlocking pile.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A occlusal bored pile structure, comprising a sequence pile A and a sequence pile B, wherein a base layer is arranged outside the sequence pile A and the sequence pile B, and a rock layer is arranged at the bottom of the base layer;

[0009] The corresponding side walls of the sequence piles A and B are longitudinally provided with arc-shaped engaging grooves;

[0010] A pile hole opened at the base layer is arranged between the arc-shaped engaging grooves, a sleeve is placed inside the pile hole, a support hoop abutting against the inner diameter of the pile hole is fixedly connected to the top of the outer wall of the sleeve, a notch is opened at the support hoop, and a lifting ear is symmetrically installed on the top of the sleeve;

[0011] An interlocking pile is cast inside the sleeve, and a steel cage is placed inside the interlocking pile.

[0012] Furthermore, a mud pool is excavated on the surface of the base layer corresponding to the pile hole;

[0013] A water inlet is excavated on one side of the mud pool close to the pile hole, and the water inlet corresponds to the notch.

[0014] Furthermore, the distance between the bottom end of the sleeve and the bottom of the pile hole is set at 10-15 cm.

[0015] Furthermore, a gap is provided between the outer wall of the sleeve and the inner wall of the pile hole.

[0016] Furthermore, the outer diameter of the steel cage is smaller than the inner diameter of the sleeve.

[0017] Furthermore, the bottom end of the steel cage is wrapped by the bite pile, and the top end of the steel cage is exposed at the top end of the bite pile.

[0018] Furthermore, the bottom ends of the sequence piles A, sequence piles B and interlocking piles are all in contact with the rock formation.

[0019] Furthermore, the steel cage is welded together by longitudinal main bars, reinforcing hoops and spiral hoops.

[0020] A construction method for an interlocking bored pile structure comprises the following steps:

[0021] Step 1: During construction, first, the pouring of the sequence piles A1 and B2 is completed on the base layer. After the sequence piles A1 and B2 are initially set, arc-shaped bite grooves are cut on the sequence piles A1 and B2, and pile holes are formed at the arc-shaped bite grooves.

[0022] Step 2: After taking out the soil in the pile hole, put a sleeve inside the pile hole, make the support hoop 7 abut against the inner wall of the pile hole, use the support hoop to form a gap between the sleeve and the pile hole for draining mud, use the lifting lug to match the wire rope to hang on the hook of the crane, make the sleeve suspended in the air, make the distance between the bottom end of the sleeve and the bottom of the pile hole between 10-15cm, and then put the steel cage into the sleeve;

[0023] Step 3: Finally, pour concrete in the sleeve to form an interlocking pile. During the concrete pouring process, the mud at the bottom of the pile hole is squeezed out through the gap between the sleeve and the pile hole, and the concrete fills the gap under pressure and continues to squeeze the mud upward until the concrete completely fills the pile hole. Finally, use a crane to pull the sleeve out from the inside of the pile hole.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] (1) This scheme uses a lifting lug in conjunction with a steel wire rope to be hung on the hook of a crane, so that the sleeve is suspended in the air, and the distance between the bottom end of the sleeve and the bottom of the pile hole is between 10-15 cm. Then, a steel cage is lowered into the sleeve, and finally, concrete is poured into the sleeve to form an interlocking pile. During the pouring of concrete, the mud at the bottom of the pile hole is extruded and discharged through the gap between the sleeve and the pile hole, while the concrete fills the gap under the action of pressure and continues to squeeze the mud upward until the concrete completely fills the pile hole. This can effectively reduce the amount of residual mud at the bottom of the pile hole and ensure the overall bearing capacity of the interlocking pile.

[0027] (2) In this solution, the mud squeezed out through the notch finally flows into the mud pool through the water inlet, which is convenient for collecting and processing the mud. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the arc-shaped bite groove of the present invention;

[0030] Figure 3 It is a schematic diagram of the sleeve structure of the present invention;

[0031] Figure 4 It is a schematic diagram of the support hoop structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the support hoop structure of the present invention;

[0033] Figure 6 It is a schematic diagram of the steel cage structure of the present invention.

[0034] Description of the numbers in the figure:

[0035] 1. Sequence pile A; 2. Sequence pile B; 3. Base layer; 4. Rock layer; 5. Arc-shaped interlocking groove; 6. Sleeve; 7. Support hoop; 8. Notch; 9. Lifting ear; 10. Interlocking pile; 11. Steel cage; 12. Mud pool. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0037] Example:

[0038] See also Figure 1-4 A occlusal bored pile structure includes a sequence pile A1 and a sequence pile B2, a base layer 3 is arranged outside the sequence pile A1 and the sequence pile B2, and a rock layer 4 is arranged at the bottom of the base layer 3;

[0039] The corresponding side walls of the sequence pile A1 and the sequence pile B2 are longitudinally provided with arc-shaped engagement grooves 5;

[0040] A pile hole is provided between the arc-shaped engaging grooves 5 and is opened at the base layer 3. A sleeve 6 is placed inside the pile hole. A support hoop 7 abutting against the inner diameter of the pile hole is fixedly connected to the top of the outer wall of the sleeve 6. A notch 8 is opened at the support hoop 7. A lifting ear 9 is symmetrically installed on the top of the sleeve 6.

[0041] The inner side of the sleeve 6 is cast with an interlocking pile 10, and the inner side of the interlocking pile 10 is placed with a steel cage 11;

[0042] It should be noted that, during construction, the pouring of the sequence piles A1 and B2 is first completed on the base layer 3. After the sequence piles A1 and B2 are initially set, arc-shaped bite grooves 5 are cut on the sequence piles A1 and B2, and pile holes are formed at the arc-shaped bite grooves 5. After the soil in the pile hole is taken out, the sleeve 6 is placed inside the pile hole, so that the support hoop 7 is in contact with the inner wall of the pile hole, and the support hoop 7 is used to form a gap between the sleeve 6 and the pile hole for draining mud. The lifting lug 9 is used to cooperate with the steel wire rope to be hung on the hook of the crane, so that the sleeve 6 is suspended in the air, so that the bottom end of the sleeve 6 is in contact with the bottom of the pile hole. The spacing is between 10-15cm, and then a steel cage 11 is lowered into the sleeve 6. Finally, concrete is poured into the sleeve 6 to form an interlocking pile 10. During the pouring of concrete, the mud at the bottom of the pile hole is extruded so that the mud is discharged through the gap between the sleeve 6 and the pile hole, and the concrete fills the gap under the action of pressure and continues to squeeze the mud upward until the concrete completely fills the pile hole, which can effectively reduce the residual amount of mud at the bottom of the pile hole and ensure the overall bearing capacity of the interlocking pile 10. Finally, the sleeve 6 is pulled out from the inside of the pile hole using a crane.

[0043] like Figure 1 As shown, a mud pool 12 is excavated on the surface of the base layer 3 corresponding to the pile hole;

[0044] A water inlet is excavated on one side of the mud pool 12 close to the pile hole, and the water inlet corresponds to the notch 8;

[0045] It should be noted that the mud squeezed out through the notch 8 finally flows into the mud pool 12 through the water inlet, which is convenient for collecting and processing the mud;

[0046] The dimensions of the mud pool 12 are 6 m in length, 5 m in width and 2 m in depth. During the construction process, a guardrail is installed around the mud pool 12 for safety protection, and a warning sign is hung.

[0047] like Figure 1 , Figure 3 As shown, the distance between the bottom end of the sleeve 6 and the bottom of the pile hole is set at 10-15 cm, and a gap is set between the outer wall of the sleeve 6 and the inner wall of the pile hole;

[0048] It should be noted that it is beneficial to squeeze the mud at the bottom of the pile hole through the gap provided between the outer wall of the sleeve 6 and the inner wall of the pile hole by utilizing the gravity potential energy generated during the falling process of the concrete.

[0049] like Figure 4 As shown, the outer diameter of the steel cage 11 is smaller than the inner diameter of the sleeve 6, the bottom end of the steel cage 11 is wrapped by the bite pile 10, and the top end of the steel cage 11 is exposed at the top end of the bite pile 10;

[0050] It should be noted that before the steel cage 11 is lowered, a pad is tied to the side wall of the steel cage 11 with iron wire so that the pad abuts against the inner diameter of the sleeve 6, so that the steel cage 11 can be centered inside the sleeve 6;

[0051] The leaked portion at the top of the reinforcement cage 11 is used for pile connection.

[0052] like Figure 1 As shown, the bottom ends of the sequence pile A1, sequence pile B2 and the interlocking pile 10 are all in contact with the rock layer 4;

[0053] It should be noted that the overall bearing capacity of the sequence pile A1, sequence pile B2 and interlocking pile 10 is guaranteed.

[0054] like Figure 6 As shown, the steel cage 11 is welded together by longitudinal main bars, reinforcing hoops and spiral hoops.

[0055] In use: During construction, first, the sequence piles A1 and B2 are cast on the base 3. After the sequence piles A1 and B2 are initially set, arc-shaped bite grooves 5 are cut on the sequence piles A1 and B2, and pile holes are formed at the arc-shaped bite grooves 5. After the soil in the pile hole is taken out, the sleeve 6 is placed inside the pile hole, so that the support hoop 7 is in contact with the inner wall of the pile hole, and the support hoop 7 is used to form a gap between the sleeve 6 and the pile hole for draining mud. The lifting lug 9 is used to cooperate with the steel wire rope to be hung on the hook of the crane, so that the sleeve 6 is suspended. The sleeve 6 is hollow so that the distance between the bottom end of the sleeve 6 and the bottom of the pile hole is between 10 and 15 cm, and then a steel cage 11 is lowered into the sleeve 6. Finally, concrete is poured into the sleeve 6 to form an interlocking pile 10. During the pouring of concrete, the mud at the bottom of the pile hole is extruded so that the mud is discharged through the gap between the sleeve 6 and the pile hole, and the concrete fills the gap under the action of pressure and continues to squeeze the mud upward until the concrete completely fills the pile hole. Finally, the sleeve 6 is pulled out from the inside of the pile hole by a crane.

[0056] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of 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.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An interlocking bored pile structure, comprising a sequence pile A (1) and a sequence pile B (2), characterized in that: A base layer (3) is arranged outside the sequence pile A (1) and the sequence pile B (2), and a rock layer (4) is arranged at the bottom of the base layer (3); The corresponding side walls of the sequence pile A (1) and the sequence pile B (2) are longitudinally provided with arc-shaped engaging grooves (5); A pile hole is provided between the arc-shaped engaging grooves (5) and is opened at the base layer (3). A sleeve (6) is placed inside the pile hole. A support hoop (7) abutting against the inner diameter of the pile hole is fixedly connected to the top of the outer wall of the sleeve (6). A notch (8) is opened at the support hoop (7). Lifting ears (9) are symmetrically installed at the top of the sleeve (6); An interlocking pile (10) is cast inside the sleeve (6), and a steel cage (11) is placed inside the interlocking pile (10).

2. The interlocking bored pile structure according to claim 1, characterized in that: A mud pool (12) is excavated on the surface of the base layer (3) corresponding to the pile hole; A water inlet is excavated on one side of the mud pool (12) close to the pile hole, and the water inlet corresponds to the notch (8).

3. The interlocking bored pile structure according to claim 1, characterized in that: The distance between the bottom end of the sleeve (6) and the bottom of the pile hole is set at 10-15 cm.

4. The interlocking bored pile structure according to claim 1, characterized in that: A gap is provided between the outer wall of the sleeve (6) and the inner wall of the pile hole.

5. The interlocking bored pile structure according to claim 1, characterized in that: The outer diameter of the steel cage (11) is smaller than the inner diameter of the sleeve (6).

6. The interlocking bored pile structure according to claim 1, characterized in that: The bottom end of the steel cage (11) is wrapped by the snap-fit ​​pile (10), and the top end of the steel cage (11) is exposed at the top end of the snap-fit ​​pile (10).

7. The interlocking bored pile structure according to claim 1, characterized in that: The bottom ends of the sequence pile A (1), sequence pile B (2) and the interlocking pile (10) are all in contact with the rock layer (4).

8. The interlocking bored pile structure according to claim 1, characterized in that: The steel cage (11) is composed of longitudinal main reinforcements, reinforcing hoops and spiral hoops welded together.

9. A construction method for an interlocking bored pile structure, characterized in that: It includes the following steps: Step 1: During construction, first, the pouring of the sequence piles A1 and B2 is completed on the base layer. After the sequence piles A1 and B2 are initially set, arc-shaped bite grooves are cut on the sequence piles A1 and B2, and pile holes are formed at the arc-shaped bite grooves. Step 2: After taking out the soil in the pile hole, put a sleeve inside the pile hole, make the support hoop 7 abut against the inner wall of the pile hole, use the support hoop to form a gap between the sleeve and the pile hole for draining mud, use the lifting lug to match the wire rope to hang on the hook of the crane, make the sleeve suspended in the air, make the distance between the bottom end of the sleeve and the bottom of the pile hole between 10-15cm, and then put the steel cage into the sleeve; Step 3: Finally, pour concrete in the sleeve to form an interlocking pile. During the concrete pouring process, the mud at the bottom of the pile hole is squeezed out through the gap between the sleeve and the pile hole, and the concrete fills the gap under pressure and continues to squeeze the mud upward until the concrete completely fills the pile hole. Finally, use a crane to pull the sleeve out from the inside of the pile hole.

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