阅读说明：本技术 一种适用于包裹碎石桩施工的桩管结构及施工方法 (Pile pipe structure suitable for wrapping gravel pile construction and construction method ) 是由 杨虎 张建伟 张如飞 李峰 祖月辉 赵瑞国 徐增宇 袁占军 赵浩 张健 高利涛 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种适用于包裹碎石桩施工的桩管结构及施工方法,包括内部为中空结构的桩管、设置在所述桩管下端的活动式桩头以及可拆卸连接在桩管顶端的套筒,且套筒的下部位于桩管内,桩管内部铺覆有土工布层；其结构可靠,操作便捷,可以同时施工多个包裹碎石桩,极大地加快了施工效益,极大的节省时间成本,并且通过桩管和打桩机之间的特定连接结构,大大提高了两者连接效果,保证打桩和拔桩操作的可靠性。(The invention discloses a pile tube structure suitable for wrapping gravel pile construction and a construction method, wherein the pile tube structure comprises a pile tube, a movable pile head and a sleeve, wherein the interior of the pile tube is of a hollow structure; its structure is reliable, and the simple operation can construct a plurality of parcel gravel piles simultaneously, has greatly accelerated the construction benefit, very big save time cost to through the specific connection structure between stake pipe and the pile driver, improved both connection effect greatly, guarantee the reliability of pile driving and pile pulling operation.)

1. The utility model provides a stake tubular construction suitable for parcel gravel pile construction, its characterized in that is including inside stake pipe (1), the setting for hollow structure movable pile head (2) and the removable connection of stake pipe (1) lower extreme are in sleeve (3) on stake pipe (1) top, just the lower part of sleeve (3) is located in stake pipe (1), stake pipe (1) inside shop has geotechnological cloth layer (4).

2. The pile tube structure suitable for wrapping gravel pile construction of claim 1, wherein the movable pile head (2) comprises two movable plates (21) hinged to the lower end of the pile tube (1) through hinge assemblies (20), respectively, and the two movable plates (21) are internally formed with cavities communicated with the inside of the pile tube (1).

3. The pile tube structure suitable for wrapping gravel pile construction of claim 2, wherein the hinge assembly (20) comprises a connecting plate (201) arranged on the pile tube (1) and the movable plate (21) and a rotating shaft (202) axially arranged on the connecting plate (201) and penetrating through the pile tube (1) and the movable plate (21), and a pressing plate (203) is movably connected to the rotating shaft (202).

4. The pile tube structure suitable for wrapping gravel pile construction of claim 1, wherein the sleeve (3) comprises a cylinder (30) and a limit reverse buckle (31) arranged at the top end of the cylinder (30), the cylinder (30) is positioned inside the pile tube (1), the limit reverse buckle (31) is abutted against the outer wall of the top end of the pile tube (1), and the geotextile layer (4) is reversely wrapped on the cylinder (30).

5. Pile tube structure suitable for the construction of wrapped gravel piles according to claim 1, characterized in that the diameter of the movable pile head (2) is larger than the diameter of the pile tube (1).

6. Pile tube structure suitable for use in wrapped gravel pile construction according to any of claims 1 to 5, characterized by the top end of the pile tube (1) being slidingly connected to the pile driver by means of a sliding plate (10).

7. Pile tube structure suitable for wrapping gravel pile construction according to claim 6, characterized in that the sliding plate (10) is provided with a rotating disc (11), and the rotating disc (11) is connected with the pile tube (1) by rotating adjusting bolt (12).

8. A method of constructing a pile tube structure suitable for use in the construction of wrapped gravel piles according to any of claims 1 to 7, comprising the steps of:

s1: connecting a pile driver with the pile pipe (1), and driving the pile pipe (1) into a soil body through the pile driver;

s2: after the pile pipe (1) is driven into the soil body, separating the pile driver from the pile pipe (1), and keeping the top of the pile pipe (1) higher than the ground;

s3: reversely wrapping the geotextile on the sleeve (3), and then installing the sleeve (3) on the pile tube (1);

s4: filling gravel filler into the pile pipe (1) through the sleeve (3) so that the geotextile wraps the gravel filler and enters the pile pipe (1);

s5: the sleeve (3) is detached from the upper end of the pile pipe (1), and the pile driver is connected to the pile pipe (1) to form the pile by pulling the pipe upwards.

9. A pile tube structure adapted for use in the construction of a wrapped gravel pile according to claim 8, wherein a funnel is placed above the sleeve (3) when the gravel pack is filled in S4, and then the gravel pack is discharged into the pile tube (1) along the funnel.

Technical Field

The invention relates to the technical field of soft foundation treatment, in particular to a pile pipe structure suitable for wrapping gravel pile construction and a construction method.

Background

The common foundation treatment technology comprises modes of replacement, drainage consolidation, condensate pouring, compaction by vibration, reinforcement, cold and hot treatment and the like, wherein the gravel pile treatment technology has the advantages of energy efficiency, improvement of foundation bearing capacity, acceleration of drainage consolidation, reduction of foundation settlement, low cost, short construction period and the like, and is widely applied to foundation treatment engineering.

In engineering practice, the conventional gravel pile may be subjected to bulging deformation and damage due to insufficient radial constraint provided by soil around the pile, so that the bearing capacity of the foundation is improved, the settlement control of the foundation is limited, particularly in areas with soft soil, the application of the gravel pile composite foundation is greatly limited, in order to solve the problems, some students gradually propose a concept of wrapping the gravel pile, namely wrapping a layer of geotechnical material outside the conventional gravel pile, providing the radial constraint on the pile by utilizing the stronger tensile capacity of the geotechnical material, preventing the occurrence of larger bulging deformation, and ensuring that the gravel pile has good water permeability and can serve as a good drainage channel. Some theories and experiments prove that the wrapped gravel pile can effectively improve the rigidity of a pile body and the bearing capacity of a foundation, however, in the actual construction process, the construction of the wrapped gravel pile is difficult, the friction force between a pile pipe and the surrounding soil body is large, the burying of geotechnical materials is very difficult, and when the wrapped gravel pile is adopted on a large scale, the construction progress and the cost have great problems.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a pile tube structure and a construction method suitable for wrapping gravel pile construction.

The technical scheme for solving the technical problems is as follows: the utility model provides a stake tubular construction suitable for parcel gravel pile construction, is in including inside hollow structure's stake pipe, setting movable pile head and the sleeve of dismantling the connection on stake pipe top of stake pipe lower extreme, and telescopic lower part is located the stake pipe, and the inside geotechnological cloth layer that has laid of stake pipe.

Further, the movable pile head comprises two movable plates hinged to the lower end of the pile pipe through hinge assemblies respectively, and a cavity communicated with the interior of the pile pipe is formed inside the two movable plates.

Furthermore, the hinge assembly comprises a connecting plate arranged on the pile tube and the movable plate and a rotating shaft axially arranged on the connecting plate and penetrating through the pile tube and the movable plate, and a pressing plate is movably connected to the rotating shaft.

Further, the sleeve includes the barrel and sets up the spacing back-off on the barrel top, and the barrel is located inside the stake pipe, and spacing back-off supports and leans on stake pipe top end outer wall, and geotechnological cloth is turned over and is wrapped on the barrel.

Further, the top end of the pile tube is connected with the pile driver in a sliding mode through a sliding plate.

Further, the diameter of the pile head is larger than the diameter of the pile tube.

Furthermore, a rotating disc is arranged on the sliding plate and connected with the pile pipe through a rotating adjusting bolt.

The invention also provides a construction method of the pile tube structure suitable for wrapping gravel pile construction, which comprises the following steps:

s1: connecting a pile driver with the pile pipe, and driving the pile pipe into the soil body through the pile driver;

s2: after the pile pipe is driven into the soil body, separating the pile driver from the pile pipe, and keeping the top of the pile pipe higher than the ground;

s3: reversely wrapping the geotextile on the sleeve, and then installing the sleeve on the pile pipe;

s4: filling the broken stone filler into the pile pipe through the sleeve, so that the geotechnical cloth wraps the broken stone filler and enters the pile pipe;

s5: the sleeve is detached from the upper end of the pile tube, the pile driver is connected to the pile tube, and the tube is pulled upwards to form the pile.

Further, when the crushed stone filler is filled in S4, a funnel is placed above the sleeve, and then the crushed stone filler is discharged into the pile tube along the funnel.

The invention has the following beneficial effects: the pile tube structure and the construction method suitable for wrapping gravel pile construction are reliable in structure and convenient and fast to operate, a plurality of wrapped gravel piles can be constructed simultaneously, construction benefits are greatly accelerated, time cost is greatly saved, the connection effect of the pile tube and the pile driver is greatly improved through the specific connection structure between the pile tube and the pile driver, and the reliability of pile driving and pile pulling operation is guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the movable pile head of the present invention;

FIG. 3 is a schematic view of the sleeve structure of the present invention;

FIG. 4 is a schematic view of the connection between the pile tube and the pile driver according to the present invention;

FIG. 5 is a schematic view of the construction process of the present invention.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1, a stake tubular construction suitable for parcel gravel pile construction, including inside hollow structure's stake pipe 1, set up at the movable pile head 2 of stake pipe 1 lower extreme and can dismantle the sleeve 3 of connection on stake pipe 1 top, and the lower part of sleeve 3 is located stake pipe 1, and stake pipe 1 is inside to be laid and to have geotechnological cloth layer 4. The diameter of the pile head is slightly larger than that of the pile pipe 1, so that the friction between the pipe wall and the surrounding soil body is greatly reduced, and the pile is conveniently driven and pulled out. The periphery of the top of the pile pipe 1 is provided with threaded openings, the threaded openings are connected with a pile driver through bolts, when the pile pipe 1 is driven into the soil, the pile pipe 1 can be separated from the pile driver, and the operation is convenient and reliable.

As shown in fig. 2, the movable pile head 2 includes two movable plates 21 respectively hinged to the lower end of the pile tube 1 by hinge assemblies 20, and the two movable plates 21 are formed with cavities therein communicating with the interior of the pile tube 1. The pile head adopts a structure of two movable plates 21, the movable plates 21 are connected with the pile pipe 1 through a hinge assembly 20, can be pressed and closed towards the middle under the action of upward external force, and can also be opened towards two sides under the action of internal downward external force. Therefore, when the movable plate 21 is vertically inserted into the soil body downwards, the movable plate 21 is closed under the extrusion action of the soil body, and when the pipe is pulled out to form a pile, the movable plate 21 is opened under the pressure action of the internal broken stones.

The hinge assembly 20 includes a connecting plate 201 disposed on the pile tube 1 and the movable plate 21, and a rotating shaft 202 axially disposed on the connecting plate 201 and penetrating through the pile tube 1 and the movable plate 21, wherein a pressing plate 203 is further movably connected to the rotating shaft 202.

As shown in fig. 3, the sleeve 3 includes a cylinder 30 and a limit reverse buckle 31 arranged at the top end of the cylinder 30, the cylinder 30 is located inside the pile tube 1, the limit reverse buckle 31 abuts against the outer wall of the top end of the pile tube 1, and the geotextile is reversely wrapped on the cylinder 30. The limiting reverse buckle 31 is provided with a round hole. Can be convenient for sleeve 3 and pile tube 1's dismantlement through spacing back-off 31 to be connected, during the use, barrel 30 stretches into pile tube 1's inside, and spacing back-off 31 then supports and detains on pile tube 1's top, thereby only need can the handling realize the dismantlement of spacing back-off 31 and sleeve 3 through the round hole on the spacing back-off 31 when needs are dismantled.

As shown in fig. 4, the top end of the pile tube 1 is slidably connected to the pile driver through a sliding plate 10, a rotating disc 11 is provided on the sliding plate 10, and the rotating disc 11 is connected to the pile tube 1 through a rotation adjusting bolt 12. The pile tube 1 can slide left and right along the pile driver through the sliding plate 10, the pile tube 1 can be driven to rotate within a certain range by loosening the rotary adjusting bolt 12, and the connection position of the pile tube 1 and the pile driver is fixed by screwing the rotary adjusting bolt 12.

As shown in fig. 5, the present invention also provides a construction method of a pile tube structure suitable for wrapping gravel pile construction, comprising the following steps:

s1: connecting a pile driver with the pile pipe 1, and driving the pile pipe 1 into a soil body through the pile driver;

s2: after the pile pipe 1 is driven into the soil body, separating the pile driver from the pile pipe 1, and keeping the top of the pile pipe 1 higher than the ground;

s3: reversely wrapping the geotextile on the sleeve 3, and then installing the sleeve 3 on the pile pipe 1;

s4: filling gravel filler into the pile pipe 1 through the sleeve 3, so that the geotextile wraps the gravel filler and enters the pile pipe 1; when filling the gravel pack, a funnel is placed above the sleeve 3, and the gravel pack is subsequently discharged into the pile tube 1 along the funnel

S5: the sleeve 3 is detached from the upper end of the pile tube 1, and the pile driver is connected to the pile tube 1, and the tube is pulled upwards to form the pile.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.