CN206015681U - A kind of marine static load pile-sinking device - Google Patents

Abstract

The utility model discloses an offshore static load pile sinking device, which comprises a straight line distributed pile body sunk under the seabed surface and four barrel-shaped foundations, and the four barrel-shaped foundations are symmetrically distributed on both sides of the pile body , the upper end faces of the four barrel-shaped foundations are provided with lifting points and water inlet and outlet valves at intervals. The upper ends of the piles are covered with pile caps, and the upper ends of the pile caps are fixedly connected with loading trusses. They are respectively connected by vertical steel cables, and each steel cable is equipped with a steel cable tensioner, and the loading truss is subjected to a pull-down load through the cable tensioner, and the pull-down load received by the loading truss is finally transmitted to the pile body, so that The pile body sinks gradually, so as to achieve the purpose of static load pile sinking. The vertical load on the steel cable of the utility model is converted into the sinking load of the pile body, which does not produce a horizontal component that is not helpful to the sinking of the pile body, the pile sinking load is large, and the efficiency is high; the construction is simple and convenient, and no large-scale equipment is required , with good economy and practicality.

Description

An offshore static load pile sinking device

Technical field:

The utility model relates to an offshore pile sinking technology, in particular to an offshore static load pile sinking device.

Background technique:

Pile foundations have been widely used in port, marine and bridge engineering fields. At present, there are generally two types of methods for pile sinking construction at sea: one is to drive the pile into the seabed soil by adding dynamic impact force, and the other is to press the pile structure into the seabed soil by adding static ballast.

When using a piling ship to drive pilings at sea, the cost of using a special piling ship is high, there is noise pollution, and there is potential vibration damage to other buildings. The construction process is easily affected by wind and wave factors, especially in rivers, estuaries and large tidal currents. In the sea area, due to the high water velocity, it is difficult to locate and displace the piling ship through anchor cable positioning and displacement, and the piling efficiency is low. It can be seen that in the environment where dynamic impact piling is not suitable, static load piling method should be used.

Chinese Patent Authorization Announcement No. CN2464778Y discloses a device for sinking piles under static load on water, which is mainly composed of a pile cap, a cylindrical suction anchor, a steel cable and a tensioner on the cable. fully submerged in the submerged foundation soil. The limitation of this patent is that: the steel cable acts obliquely on the pile cap, assuming that the tension of the steel cable is F, and the angle between the steel cable and the horizontal plane is θ, the vertical downward pulling force provided by each cylindrical suction anchor is only Fsinθ; If θ=30°, then Fsinθ=0.5F, that is, only half of the cable tension F is helpful to pile sinking, which shows that the pile sinking load is small and the efficiency is low; The pile is not helpful, and it will also cause the barrel suction anchor to tilt and rotate, thereby reducing the pile sinking capacity of the barrel foundation. It can be seen that a simple and efficient static load pile sinking device needs to be developed.

Utility model content:

In order to make up for the deficiencies of the existing technical problems, the purpose of the utility model is to provide an offshore static load pile sinking device, which is easy to operate and convenient for construction of offshore static load pile sinking.

The technical scheme of the utility model is as follows:

The offshore static load pile sinking device is characterized in that it includes four barrel-shaped foundations distributed in a straight line and sunk under the seabed, the four barrel-shaped foundations are symmetrically distributed on both sides of the pile body, and the four barrel-shaped foundations There are lifting points and water inlet and outlet valves at intervals on the upper end surface. Pile caps are set on the upper ends of the piles to be penetrated. The upper ends of the pile caps are fixedly connected with loading trusses. Connected to the steel cables, each cable is provided with a cable tensioner.

The static load pile sinking device at sea is characterized in that the lifting point is set at the center of the top of the barrel-shaped foundation.

The static load pile sinking device at sea is characterized in that the loading truss is composed of an intermediate loading truss and extended loading trusses on both sides thereof, and the midpoint of the intermediate loading truss is located on the central axis of the pile body.

The utility model has the advantages of:

1. The four barrel-shaped foundations of the utility model are symmetrically distributed on both sides of the pile body, and the steel cables are distributed vertically to connect the barrel-shaped foundations and the loading truss. The vertical load on the steel cables is transformed into the sinking load of the pile body, which does not It will produce a horizontal component that is not helpful to the sinking of the pile body, and the pile sinking load is large and the efficiency is high.

2. The construction of the utility model is simple and convenient, without the need of large-scale equipment, and is economical and practical.

Description of drawings:

Fig. 1 is the front view of the utility model offshore static load pile sinking device.

Fig. 2 is a top view of the utility model offshore static load pile sinking device.

Fig. 3 is a schematic diagram of the barrel foundation of the utility model penetrating symmetrically into the seabed on both sides of the pile foundation.

Fig. 4 is a schematic diagram of the installation pile cap and intermediate loading truss of the utility model.

Fig. 5 is a schematic diagram of the installation and tensioning steel cables of two barrel-shaped foundations adjacent to the pile foundation of the present invention.

Fig. 6 is a schematic diagram of the extended connection on both sides of the loading truss of the present invention.

Explanation of reference signs: 1. barrel foundation; 2. water inlet and outlet valve; 3. lifting point; 4. steel cable; 5. steel cable tensioner; 6. pile body; 7. pile cap; 8. loading truss; A, seabed surface; B, sea level.

detailed description:

See attached picture:

Offshore static load pile sinking device, including four barrel-shaped foundations 1 distributed in a straight line and sunk below the seabed, the four barrel-shaped foundations 1 are symmetrically distributed on both sides of the pile body 6, and the four barrel-shaped foundations 1 The upper end surface is provided with lifting points 3 and water inlet and outlet valves 2 at intervals, which are used to extract negative pressure from external pipelines. The upper end of the pile body 6 to be sunk is set with a pile cap 7, and the upper end of the pile cap 7 is fixedly connected with a loading truss 8. The loading truss 8. The lower end surface is connected with the lifting points 3 on the four barrel-shaped foundations 1 through vertical steel cables 4, and each steel cable 4 is equipped with a steel cable tensioner 5. The cable tensioner 5 makes the loading truss 8 subject to the pull-down load, and the pull-down load received by the loading truss 8 is finally transmitted to the pile body 6, and then the pile body 6 gradually sinks, thereby achieving the purpose of static load sinking.

The hanging point is set at the top center of the barrel foundation 1.

In order to facilitate transportation and installation, the loading truss is generally assembled with multi-section trusses; the loading truss 8 is composed of the middle loading truss and the extended loading trusses of the same length on both sides, so that the loading truss can exceed the farthest two barrel foundations 1 at both ends Directly above , the midpoint of the intermediate loading truss is located on the central axis of the pile body, and the midpoint of the overall assembled loading truss 8 is also located on the central axis of the pile body.

The loading truss 8 should have sufficient strength and rigidity, be able to withstand the axial force, shear force and bending moment transmitted by the steel cable 4, and have sufficient safety reserves.

The part of the loading truss 8 that is in contact with the steel cable 4 should be reinforced with a reinforced steel plate to prevent local yield deformation of the rod due to stress concentration.

Use auxiliary plates, bolt connections or other methods to connect the loading truss 8 to the pile cap 7 as a whole, and the pile cap 7 should be provided with a limit structure so that the loading truss 8 will not slide or fall off during use, ensuring that the loading truss 8 8 for overall stability.

The upper part of the steel cable 4 is connected with a cable tensioner 5, which can make the steel cable 4 tense and can provide the required sufficient pulling force.

The construction process of offshore static load pile sinking device is as follows:

1) Pile body positioning and barrel foundation penetration:

At the designated offshore construction point, use equipment to place the pile body 6 vertically at the proposed penetration point, and the penetration depth should ensure the verticality of the pile body 6 itself, and can bear a certain vertical load without lateral displacement. prevail. With the pile body 6 as the center, four barrel-shaped foundations 1 are sunk symmetrically on both sides to contact the seabed, and the vacuum is drawn through the inlet and outlet valves 2 of the barrel-shaped foundation 1 to sink to a sufficient depth in the seabed soil ; After the construction is completed, the four barrel foundations 1 and the piles 6 are distributed in a straight line;

Generally, after a hemispherical body is inlaid on the top of the pile body 6, the pile cap 7 can be put on, and the pile cap 7 has a corresponding concave spherical hole; like this, the connection between the pile cap 7 and the pile body 6 is equivalent to a point The contact, which only transmits vertical loads but not bending moments, ensures that the pile body 6 is pressed vertically into the seabed without lateral displacement.

2) Install pile caps and intermediate loading trusses:

Put the pile cap 7 and the auxiliary device on the pile body 6, and then put the intermediate loading truss 8 on the pile cap 7. The pile cap 7 and the intermediate loading truss 8 are fixedly connected to each other through an auxiliary device;

The pile cap 7 or the pile body 6 should be provided with a limit structure so that the loading truss 8 will not slide or fall off during use, so as to ensure the overall stability of the loading truss 8 .

3), Install the steel cables of the two barrel foundations closest to the pile body:

For the two barrel foundations closest to the pile body 6, the steel cable 4 is vertically connected to the lifting point 3 on the barrel foundation 1 and the intermediate loading truss 8, and the two are connected by initially tensioning the steel cable tensioner 5. The steel cable 4 of the barrel foundation 1 tensions the loading truss 8 to form a stable structure;

Here, the steel cable tensioner 5 is tightened so that the steel cable 4 only pulls the loading truss 8 to form a stable structure, which is convenient for the connection and extension of the subsequent loading truss.

4) Continue and extend the loading truss on both sides of the middle loading truss:

Continue and extend the loading truss symmetrically on both sides of the middle loading truss 8, so that the loading truss 8 can exceed the top of the two farthest barrel foundations 1 at both ends;

The parts where the loading trusses are connected to each other are provided with connecting steel plates and bolt holes, which are fixed and connected by bolts. The connection should be able to withstand the maximum axial force, shear force and bending moment during the construction process, and have a certain safety reserve.

5), install the steel cables of the remaining two barrel foundations, and implement uniform loading operations:

For the two barrel foundations farthest from the pile body 6, the steel cable 4 is vertically connected to the lifting point 3 on the barrel foundation 1 and the loading truss 8, and the steel cable tensioner 5 is initially tensioned to connect the two. The steel cable 4 tension loading truss 8 of barrel foundation 1;

So far, the four barrel-shaped foundations have been preliminarily tensioned and the loading truss 8 has been pulled to form a stable loading system; at the same time, the steel cable tensioners 5 above the four barrel-shaped foundations have been gradually tensioned, and each steel cable 4 The tensile force of the steel cable 4 is basically the same, so that the tensile force of the steel cable 4 becomes the sinking load of the pile body 6, and the pile body 6 is penetrated into the seabed gradually;

During the static load pile sinking process, the levelness of the loading truss 8 should be maintained. If it is found that the loading truss 8 is inclined, the tension on the steel cables 4 at different positions should be adjusted to make the loading truss 8 return to the horizontal state; The construction of load bearing piles is completed.

After the static load pile sinking of the device mentioned by the utility model is completed, each steel cable tensioner 5 is released, the steel cable 4 is untied, the loading truss 8 is removed, and water is injected into the bucket through the water inlet and outlet valves 2 of each bucket foundation. The barrel-shaped foundation gradually moves upwards and finally pulls out the seabed, and lifts away from each barrel-shaped foundation to complete the dismantling of the device proposed by the utility model.

The utility model is not limited to the above-mentioned specific embodiments. According to the above content, according to the common technical knowledge and conventional means in this field, without departing from the above-mentioned basic technical idea of the utility model, the utility model can also be made into other various forms. The equivalent modifications, replacements or alterations all fall within the protection scope of the present utility model.

Claims (3)

1. a kind of marine static load pile-sinking device, it is characterised in that including distribution in alignment, sink under sea bed face four Barrel base, four barrel bases are symmetrically distributed in the both sides of pile body, be interval with suspension centre, enter on four barrel base upper surfaces Outlet valve, treats that heavy pile body upper end of passing through is set with pile cover, and pile cover upper end is fixedly connected with loading truss, loading truss lower surface and four Suspension centre on individual barrel base is connected by vertical wirerope respectively, is equipped with steel cable tensioner on every wirerope.

2. marine static load pile-sinking device according to claim 1, it is characterised in that described suspension centre is arranged on barrel base Top center.

3. marine static load pile-sinking device according to claim 1, it is characterised in that described loading truss is loaded by centre The prolongation loading truss of truss and its both sides is constituted, and the midpoint of middle loading truss is located on pile body central axis.