CN209891224U

CN209891224U - Caisson with pile hole

Info

Publication number: CN209891224U
Application number: CN201920324487.7U
Authority: CN
Inventors: 王静波
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-01-03
Anticipated expiration: 2029-03-14

Abstract

A caisson with pile holes relates to a caisson with pile holes. The caisson comprises a caisson body, wherein the caisson body comprises a peripheral wall, an inner wall and a bulkhead formed by separating the inner wall; a connecting hole is reserved on the inner wall of the pile hole in the caisson body; and steel piles are arranged in the pile holes, and the steel piles in different pile holes penetrate through the connecting holes to be connected through steel beams. The utility model discloses have construction convenience, practice thrift cost, reduction of erection time, safe and reliable's positive effect.

Description

Caisson with pile hole

Technical Field

The utility model belongs to a hydraulic construction component caisson, in particular to a caisson with stake hole.

Background

The foundation of underwater buildings such as sea-crossing bridges, ports and docks must have enough bearing capacity and resist lateral impact force to ensure the stability of the buildings. In the construction of deep water wharfs which can berth large and ultra-large ships at sea, whether trestles or upright quay walls, a gravity wharf which takes a caisson as a base is generally used, and the caisson falls in water without displacement by means of friction force formed by gravity generated by the weight of the caisson and the ground by the bottom surface of the caisson and a processed and leveled seabed plane. If the dock is open sea area without breakwater shield and the moored ship is large, the volume of the caisson must be large enough to resist the surge impact from the side without displacement and inclination. When the seabed geology condition is that the wharf is built in a water area with deep silt, a pile driving method is generally adopted, and no matter a common steel pile or a rigid precast pile is adopted, a lateral pile is required to be used as support protection, so that the wharf has larger supporting force and stability. The huge size of the caisson and the piling process cause the huge cost of the port and wharf construction project, hundreds of millions of years, great construction difficulty and long construction period.

Disclosure of Invention

An object of the utility model is to provide a caisson with stake hole to reach the construction of being convenient for, save the engineering investment, reduction of erection time's purpose.

The utility model provides a caisson with pile hole, including the caisson body, the caisson body includes perisporium and inner wall to and the lobe that the inner wall separated forms, its characterized in that, the perisporium and the inner wall of caisson body reserve and have vertical pile hole, the pile hole runs through the perisporium and the inner wall of caisson body; a connecting hole is reserved on the inner wall of the pile hole in the caisson body; and steel piles are arranged in the pile holes, and the steel piles in different pile holes penetrate through the connecting holes to be connected through steel beams.

The utility model provides a caisson with stake hole can take following step to accomplish the installation:

step one, processing and leveling an underwater foundation bed to be provided with a caisson;

step two, after the caisson of the utility model is prefabricated, the caisson is transported to an installation site and is seated on a treated foundation bed;

thirdly, driving steel piles downwards along the pile holes reserved in the caisson of the utility model;

step four, cleaning the surface of the connecting hole in the well-placed caisson compartment, and leaking the steel pile;

step five, cross connection is implemented between adjacent or opposite steel piles by steel beams penetrating through the connecting holes;

and step six, filling sand or rock blocks into the caisson body compartment to perform filling compaction.

The utility model provides a caisson with pile holes, the four walls and the inner wall of the caisson body are provided with pile holes, the pile holes penetrate through the four walls and the inner wall of the caisson body, steel piles are arranged in the pile holes, and then the steel piles are fixed underground along the pile holes; and connecting holes are formed in the partition cabin of the caisson body along the pile holes, and steel beams penetrate through the connecting holes to connect adjacent or opposite steel piles into a whole in a crossed manner. The positive effects are mainly reflected in that:

1) the utility model discloses simplify the construction of the stake of side direction under the complex condition under water among the prior art to the anhydrous operation in the compartment, the construction degree of difficulty greatly reduced.

The utility model discloses under current equipment condition, simplify the marine underwater construction of complicacy for the method of the waterless installation in land preparation and the lobe, can not only reduce cost by a wide margin, shorten construction period by a wide margin moreover, changed large-scale marine construction engineering into the factory manufacture and the on-the-spot conventional installation combination.

2) The application of the reserved pile hole and the steel pile can meet the requirement on the bearing capacity of the foundation under the complex geological condition.

In the prior art, when a soft foundation geological foundation is processed, a structure of upright pile support and lateral pile support is adopted. The sectional area of the pile body driven into water and underground is increased along with the increase of the water depth and the bearing capacity of the wharf. When the requirement of a certain water depth and bearing capacity is exceeded, the pile foundation cannot be adopted as a foundation, the difficulty of treating only by relying on the caisson foundation is very high, and the cost is also very high. And the utility model discloses a structure and mounting method that caisson with stake hole and pile foundation combine has just compensatied this defect, and pile and caisson body form the support jointly, and the caisson body is provided with the steel pile in it and connects integrative with the girder steel, ensures the stability and the sufficient bearing capacity of whole caisson with stake hole, and not only simple to operate, the cost is lower moreover, the time limit for a project is shorter, safe and reliable.

3) Under the prerequisite that satisfies bearing capacity and cross sectional dimension, the utility model discloses the structure and the size of caisson can reduce furthest to reduce the cost and transportation and the installation cost of caisson.

To sum up, the utility model discloses have construction convenience, practice thrift cost, reduction of erection time, safe and reliable's positive effect.

Drawings

The accompanying drawings partially disclose embodiments of the present invention, in which,

fig. 1 is a perspective schematic view of a three-dimensional structure of the present invention;

FIG. 2 is a schematic view of a partial cross-sectional structure taken along line A-A;

fig. 3 is a schematic view of the connection and fixation of the steel piles and the steel beams.

Detailed Description

As shown in fig. 1-3, the utility model provides a caisson with stake hole, including caisson body 1, the perisporium and the inner wall of caisson body 1 are provided with a plurality of vertical stake holes 2, and stake hole 2 runs through caisson body 1. A connecting hole 5 is formed in the inner wall of the caisson body 1 along the pile hole 2, the connecting hole does not penetrate through the inner wall of the caisson body, and only the steel pile is exposed; the steel piles 3 are arranged in the pile holes 2, and the steel beams 4 penetrate through the connecting holes 5 to connect the adjacent or opposite steel piles 3 together.

The shape of the caisson body can be any one of a cylinder, an elliptic cylinder, a square, a rectangular parallelepiped and a polygonal parallelepiped.

The first embodiment is as follows:

the utility model discloses a caisson with stake hole takes the following step installation:

step one, treating and leveling the foundation bed of the sitting caisson.

Whether the caisson is installed in a hard foundation area with enough bearing capacity or in an area with low bearing capacity and soft foundation geology, the installed area needs to be processed and leveled, which is basically the same as the traditional caisson foundation bed leveling, and the detailed description is omitted. When a caisson with pile holes is placed in a soft foundation area, a sludge layer needs to be dug to reach a secondary bearing layer or compacted to have certain bearing capacity.

And step two, will the utility model discloses a caisson with stake hole is prefabricated the back, transports to the place of laying, takes a seat on the foundation bed of step one flattening.

When the caisson with the pile holes is prefabricated, pile holes with designed quantity need to be reserved on the peripheral wall and the inner wall of the caisson body, the pile holes are circular or oval, and at least one pile hole is arranged on the peripheral wall and the inner wall of the caisson body on each side. The shape and the number of the pile holes are determined according to the size of the caisson body and the actual engineering condition.

And step three, drilling downwards along the pile hole to a preset depth, and then driving the steel pile.

After the caisson body is placed on a preset foundation bed, a drilling machine is used for drilling downwards along the pile holes on the peripheral wall and the inner wall to the required depth, and then the steel piles are driven along the pile holes. When the caisson is placed in the soft base region with lower bearing capacity, the region needing to be placed is processed to have certain bearing capacity, then the caisson body is placed on the ground after compaction, and the steel pile is directly driven into the depth needed by the bearing layer along the pile hole. In particular, the steel pile driven into the rock can be a self-expanding pile head

And step four, cleaning the connecting holes in the compartments of the placed caisson bodies, and leaking the surfaces of the steel piles.

Step five, in the caisson body compartment, steel beams penetrate through the connecting holes, and adjacent or opposite steel piles are welded in a cross mode to be connected together;

and step six, filling sand or rock blocks and the like into the compartment of the caisson body for treatment, compacting, and then adding a cover plate on the top for capping.

Example two:

step one, leveling a foundation bed for placing the caisson, wherein the flatness is less than 20 cm. Whether in the hard foundation area with enough bearing capacity or the area with low bearing capacity and soft foundation geology, the foundation bed needs to be leveled, and the foundation bearing capacity is ensured to be larger than the pressure of the caisson, if the foundation bearing capacity is 280kPa, and the pressure of the caisson is 220kPa, the placing requirement is met. This is substantially the same as the conventional caisson placement method and will not be described in further detail.

And step two, prefabricating a 20-ten-thousand-ton A-type caisson with pile holes according to the current standard specification, wherein the length, the width and the height of the caisson body are 17.7m, 16.4m, 23.3m, the weight of the caisson body is 2835t, the floating stability draught of the caisson is 14.0m, the fixed inclination height of the caisson body is 22cm, 1 installation and fixed pile hole is reserved on each side of 4 inner walls of the caisson body, the pile holes are circular, and the diameter of each pile hole is 0.9-1.0 m.

Will the utility model discloses the caisson with stake hole is prefabricated the back, utilizes dock or tow boat to transport to the construction and lays the ground, lays on the foundation bed through step one handles the flattening.

And thirdly, using a KH180 type diesel pile driver, selecting a 60 ~ 72 grade hammer, drilling downwards to the depth of 15m along pile holes in the peripheral wall and the inner wall of the caisson body, and then driving the steel piles with the diameter of 914.4.

And step four, cleaning the connecting hole in the drained compartment, removing burrs, residual adhesion and the like of the hole opening, completely leaking out of the surface of the steel pile, and cleaning for welding.

And step five, welding two ends of a 36 c-shaped steel beam on the surfaces of adjacent or opposite steel piles through the connecting holes respectively, and connecting 4 steel piles on 4 inner walls of the caisson body in a cross manner.

And step six, filling materials such as sand or rock blocks and the like into the caisson body compartment for filling and compacting treatment, capping the top by a capping plate, and then performing subsequent construction operation.

Claims

1. A caisson with pile holes comprises a caisson body (1), wherein the caisson body comprises a peripheral wall, an inner wall and a bulkhead formed by separating the inner wall, and is characterized in that vertical pile holes (2) are reserved on the peripheral wall and the inner wall of the caisson body and penetrate through the peripheral wall and the inner wall of the caisson body; a connecting hole (5) is reserved on the inner wall of the pile hole in the caisson body; and steel piles (3) are arranged in the pile holes, and the steel piles in different pile holes penetrate through the connecting holes through steel beams (4) to be connected.

2. Caisson with pile hole according to claim 1, characterized by that, the shape of caisson body (1) is any one of cylindrical, elliptic cylindrical, square, rectangular and polygonal.

3. Caisson with pile hole according to claim 1, characterized by that, the pile hole is circular or oval, and at least one pile hole (2) is set on the inner wall of caisson body at each side.

4. Caisson with pile hole according to claim 1, characterized by the fact that the connection holes (5) do not go through the inner wall of the caisson body.