CN219261085U

CN219261085U - Precast pile foundation structure

Info

Publication number: CN219261085U
Application number: CN202320214992.2U
Authority: CN
Inventors: 蒋国栋; 于晓岩; 周海芳; 李春保; 胡涛; 蒋美娇; 李冠星; 李婷; 张建鑫; 程斌
Original assignee: Engineering Design Institute Co ltd Of Cccc Fourth Harbor Engineering Co ltd
Current assignee: Engineering Design Institute Co ltd Of Cccc Fourth Harbor Engineering Co ltd
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-06-27
Anticipated expiration: 2033-02-13

Abstract

The utility model relates to a precast pile foundation structure, comprising: a groove dug on the ground of the pile sinking position; the precast pile is inserted into the bottom of the groove; the leveling layer is laid at the bottom of the groove; the sinking block is sleeved outside the precast pile through the through hole and is arranged on the leveling layer; backfilling block stones, wherein the backfilling block stones are paved between the sinking blocks and the grooves; and the connecting piece is filled between the sinking block and the precast pile and is used for fixing the sinking block on the precast pile. The utility model has reliable structure, is suitable for the shallow area of the covering layer, can effectively stabilize the precast pile, improves the safety coefficient, and has the advantages of low cost, simple and convenient construction, short construction period and the like.

Description

Precast pile foundation structure

Technical Field

The utility model relates to the technical field of hydraulic pile foundation structures, in particular to a precast pile foundation structure.

Background

Pile foundation structures are one of the important basic structural forms in water transportation engineering, and are widely applied to wharf structures, and precast piles can only be used because of a plurality of safety problems caused by cast-in-place piles at wharf. For pile foundations bearing horizontal force or moment, the depth of penetration of the pile foundations needs to meet the condition of the elastic long piles, namely, the depth of penetration of the pile foundations bearing horizontal force or moment needs to meet certain embedding depth requirements. In the shallow area of the covering layer, the pile sinking of the precast pile is difficult to sink to the design requirement, and the necessary pile stabilizing measures of the precast pile are needed to be considered at the moment so as to meet the design requirement.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a precast pile foundation structure which is suitable for a shallow area of a covering layer, has reliable structure, can effectively stabilize precast piles, improves the safety coefficient, and has the advantages of low manufacturing cost, simple and convenient construction, short construction period and the like.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a precast pile foundation structure comprising:

a groove dug on the ground of the pile sinking position;

the precast pile is inserted into the bottom of the groove;

the leveling layer is laid at the bottom of the groove;

the sinking block is sleeved outside the precast pile through the through hole and is arranged on the leveling layer;

backfilling block stones, wherein the backfilling block stones are paved between the sinking blocks and the grooves;

and the connecting piece is filled between the sinking block and the precast pile and is used for fixing the sinking block on the precast pile.

Compared with the prior art, the prefabricated pile is effectively reinforced layer by fully utilizing the functions of the sinking blocks, the backfill block stones and the structures of the connecting pieces after the prefabricated pile is inserted into the bottom of the groove. Therefore, in the shallow area of the covering layer, which is difficult to meet the design requirement of the pile sinking depth, the precast pile can be effectively stabilized, the safety coefficient is improved, and the pile sinking method has the advantages of low manufacturing cost, simplicity and convenience in construction, short construction period and the like.

Optionally, the sinking block is a precast concrete sinking block. The precast pile is high in rigidity, wide in raw material sources and low in cost, and by adopting the precast concrete sinking blocks, the precast pile is convenient to construct, the construction period is shortened, and the precast pile can be effectively reinforced and the cost is reduced.

Optionally, the leveling layer is a crushed stone leveling layer. The crushed stone raw material source is wide, the cost is low, and through the arrangement of the crushed stone leveling layer, the leveling layer is paved by a construction team conveniently, so that the leveling layer is smooth and tight, and the manufacturing cost of the utility model can be reduced.

Optionally, the connecting piece is formed by pouring underwater non-segregation concrete. The underwater non-segregation concrete has fluidity, can adapt to gaps with different sizes between the precast pile and the sinking block, has adhesiveness, and can tightly adhere the precast pile and the sinking block together to form a whole, thereby effectively reinforcing.

Optionally, the precast pile is a steel pipe pile or a PHC pile. The steel pipe pile is suitable for the foundation in the wharf port construction, and has the advantages of novel design, simple structure, convenient use, easy lap joint and good sealing performance. PHC pile is produced by professional manufacturer in large scale and is stable and reliable.

Optionally, the heavy piece includes the cuboid and sets up on the cuboid and the rectangle platform that the bottom is big, the top is little, the top and the ground parallel and level of cuboid. The part of the sinking block exposed out of the ground is obliquely arranged towards the precast pile direction, so that the personnel are prevented from being scratched by sharp corners.

Drawings

FIG. 1 is a front view of a pile foundation structure of a precast pile according to the present utility model;

FIG. 2 is a top view of FIG. 1 at A-A;

in the figure:

1-precast piles; 2-leveling layer; 3-sinking blocks; 4-backfilling the stone blocks; a 5-connector; 6-ground; 7-sandy cohesive soil layer; 8-granite soil layer.

Detailed Description

Embodiments of the present utility model are described in detail below, and the embodiments described below by referring to fig. 1-2 are exemplary and are intended to explain the present utility model.

Referring to fig. 1-2, a precast pile foundation structure comprises precast piles 1, a leveling layer 2, a sinking block 3, backfill block stones 4 and connecting pieces 5; firstly, a groove is formed by digging the ground at the pile sinking position, the precast pile 1 is arranged at the pile sinking position at the bottom of the groove, and pile sinking construction is carried out on the precast pile 1, so that the precast pile 1 is inserted at the bottom of the groove. Then the leveling layer 2, the sinking block 3, the backfill block stone 4 and the connecting piece 5 are acted on the periphery of the precast pile 1 to effectively strengthen the precast pile 1, so that the whole structure of the device is reliable, and the safety coefficient is improved.

Specifically, the leveling layer 2 is paved at the bottom of the groove around the precast pile 1. Through laying the screed 2, the tank bottom of the groove that makes the excavation is leveled, is favorable to placing more steadily of later stage heavy piece 3, and the device is more firm. In one embodiment, the screed 2 is a crushed stone screed. The crushed stone raw material source is wide, the cost is low, and through the arrangement of the crushed stone leveling layer 2, the leveling layer 2 is paved by a construction team conveniently, so that the leveling layer 2 is smooth and tight, and the manufacturing cost of the utility model can be reduced.

The through hole is offered at the heavy piece 3 middle part, and heavy piece 3 passes through the through hole cover and establishes in the outside of precast pile 1, and heavy piece 3 is arranged in on the screed 2. The leveling layer 2 can be compacted by placing the sinking blocks 3 on the leveling layer 2, so that the device is further reinforced. In one embodiment, the sinker 3 is a precast concrete sinker. The precast pile 1 is reinforced and the cost is reduced effectively by adopting the precast concrete sinking blocks, so that the construction is convenient, the construction period is shortened, and the cost is reduced.

The backfill block stone 4 is paved in a gap between the sinking block 3 and the groove wall of the groove, and the filling surface of the backfill block stone 4 is level with the ground 6; by filling the backfilled stone 4, the leveling layer 2 is further compacted, and meanwhile, the sinking block 3 is pushed, so that the position of the sinking block 3 can be stabilized, and the sinking block 3 is prevented from shifting. And the backfill block stone fills the groove, so that the ground is restored to be smooth, and the daily work development and the personnel walking safety are facilitated. In an embodiment, the sinking block comprises a rectangular body and a rectangular table which is arranged on the rectangular body and has a large bottom end and a small top end, and the top end of the rectangular body is flush with the ground. The part of the sinking block exposed out of the ground is obliquely arranged towards the precast pile direction, so that the personnel are prevented from being scratched by sharp corners, and the sinking block is beneficial to the development of daily work and the walking safety of the personnel.

The connecting piece 5 is poured into the gap between the precast pile 1 and the inner wall of the through hole of the sinking block 3. The connecting piece 5 is poured between the precast pile 1 and the sinking block 3, so that the precast pile 1, the sinking block 3 and the leveling layer 2 are tightly connected together to form a whole, the whole structure is firmer and more stable, and the precast pile 1 is effectively prevented from tilting. In one embodiment, the connector 5 is poured from underwater non-segregation concrete. The underwater non-segregation concrete has fluidity, can adapt to gaps with different sizes between the precast pile 1 and the sinking block 3, has adhesiveness, and can tightly adhere the precast pile 1 and the sinking block 3 together to form a whole and effectively strengthen.

In one embodiment, the precast pile 1 is a steel pipe pile or a PHC pile. The steel pipe pile is suitable for the foundation in the wharf port construction, and has the advantages of novel design, simple structure, convenient use, easy lap joint and good sealing performance. PHC pile is produced by professional manufacturer in large scale and is stable and reliable.

The following describes a construction method of the pile foundation structure of the precast pile of the present utility model:

before the precast pile 1 is reinforced, a construction team firstly digs a groove with proper size on the ground at the pile sinking position by utilizing a soil digging machine, then the precast pile 1 is placed at the bottom of the groove and is sunk to the lower layer of the groove, and sequentially passes through soil layers below the groove, such as a sandy cohesive soil layer 7 and a granite soil layer 8 in fig. 1; when the precast pile 1 is reinforced, constructors lay the leveling layer 2 at the bottom of the groove around the precast pile 1, the height of the leveling layer 2 is lower than the depth of the groove, enough space is reserved for filling backfill block stones 4 in the later period, then the sinking block 3 is sleeved on the outer side of the precast pile 1 and is arranged on the leveling layer 2, the leveling layer 2 is compacted by the gravity of the sinking block 3, then the backfill block stones 4 are filled between the outer side of the sinking block 3 and the groove wall of the groove, the filling surface of the backfill block stones 4 is flush with the ground 6, finally, underwater non-segregation concrete is poured between the precast pile 1 and the inner wall of the through hole of the sinking block 3 to form a connecting piece 5, and the precast pile, the sinking block 3 and the leveling layer 2 are connected together, so that the precast pile 1 is tightly connected with the sinking block 3, the sinking block stones 4 and the leveling layer 2 to form a whole, the precast pile 1 is effectively reinforced, the covering layer which is difficult to achieve the design requirement of the sinking pile is shallow, and the aim of effectively stabilizing the precast pile is also achieved.

Taking the granite residual sand cohesive soil layer as an example, as shown in fig. 1, the ground 6 is positioned at a position 3.80 m below the datum line, a sand cohesive soil layer 7 is arranged between the ground 6 and a 6.25 m deep line below the datum line, and the 6.25 m deep line below the datum line is a granite soil layer 8. The construction team firstly digs a groove with proper size under the ground 6 at the pile sinking position by utilizing a digger, then sequentially passes the precast pile 1 through the sandy cohesive soil layer 7 and the granite soil layer 8 in the groove, and the pile sinking is carried out to a depth of 7.70 meters below the datum line, so that the precast pile 1 is inserted at the bottom of the groove. The leveling layer 2 is paved on the bottom of a groove around the precast pile 1, the sinking block 3 is sleeved on the outer side of the precast pile 1 through a through hole, the sinking block 3 is arranged on the leveling layer 2, the rectangular table part of the sinking block 3 is higher than the ground 6, backfill stones 4 are filled in gaps between the sinking block 3 and the groove wall of the groove, the filling surface of the backfill stones 4 is flush with the ground 6, finally, underwater non-segregation concrete is poured between the precast pile 1 and the sinking block 3 to form a connecting piece 5, and the precast pile, the sinking block 3 and the leveling layer 2 are connected together, so that the precast pile 1, the sinking block 3, the backfill stones 4 and the leveling layer 2 are tightly connected together to form a whole.

In other embodiments, the precast pile 1 is placed at the bottom of the groove, is sunk to the lower layer of the groove, and can sequentially pass through other types of soil layers below the groove, such as a sandy rock soil layer and a silty clay soil layer, and the sunk pile soil depth, the ground and other data are adjusted according to the actual soil layer conditions of the engineering.

It should be noted that, in the case of no conflict, the embodiments of the present utility model and various technical features in the embodiments may be combined with each other, so long as there is no conflict or contradiction between the features, but the embodiments are not described in detail.

The present utility model is not limited to the above-described embodiments, but it is intended that the present utility model also includes modifications and variations if they fall within the scope of the claims and the equivalents thereof, if they do not depart from the spirit and scope of the present utility model.

Claims

1. A precast pile foundation structure, characterized by comprising:

a groove dug on the ground of the pile sinking position;

the precast pile is inserted into the bottom of the groove;

the leveling layer is laid at the bottom of the groove;

backfilling block stones, wherein the backfilling block stones are paved between the sinking blocks and the groove walls of the grooves;

2. A precast pile foundation structure as defined in claim 1, wherein the sinker is a precast concrete sinker.

3. A precast pile foundation structure as defined in claim 1, wherein the screed is a gravel screed.

4. A precast pile foundation structure as defined in claim 1, wherein the connecting member is poured from underwater non-segregation concrete.

5. A precast pile foundation structure as defined in claim 1, wherein the precast pile is a steel pipe pile or a PHC pile.

6. A precast pile foundation structure as defined in claim 1, wherein the sinking block comprises a rectangular body and a rectangular table arranged on the rectangular body and having a large bottom end and a small top end, and the top end of the rectangular body is flush with the ground.