CN110878546A

CN110878546A - Construction method of suction barrel and round caisson integrally prefabricated offshore deep water wharf

Info

Publication number: CN110878546A
Application number: CN201911061502.4A
Authority: CN
Inventors: 肖忠; 张栋海
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-03-13

Abstract

The invention relates to a construction method of a suction bucket and round caisson integrally prefabricated offshore deep water wharf, wherein the constructed wharf comprises at least one unit, and each unit comprises a wharf cover plate, a suction bucket and a round caisson; the suction barrel comprises a lower inner barrel, a lower outer barrel and a lower cross-shaped inner partition plate, the round caisson comprises an upper inner barrel, an upper inner barrel and an upper cross-shaped inner partition plate, the lower inner barrel and the upper inner barrel are consistent in size and correspond in position, and the lower outer barrel and the upper outer barrel are consistent in size and correspond in position.

Description

Construction method of suction barrel and round caisson integrally prefabricated offshore deep water wharf

Technical Field

The invention relates to a deepwater wharf structure, in particular to an integral prefabricated offshore deepwater wharf structure combining a suction barrel and a round caisson.

Background

With the gradual development of coastlines in China, large deepwater wharfs gradually become a development trend, but face two problems in the construction process. On one hand, the wharf is in open sea, the shielding is less, and the wave force directly acting on the wharf structure is larger; on the other hand, a plurality of seabed places have thick soft soil layers, the bearing capacity of the foundation is low, and special requirements are made on the bearing characteristics of the wharf structure type.

The structural forms which can be adopted in the deep water wharf mainly comprise a gravity type structure, a pile foundation type structure, a submerged large-diameter thin-wall structure and the like, wherein the gravity type structure has good durability, but has a large self weight, has higher requirement on the bearing capacity of a foundation and is not suitable for a soft foundation; although the pile foundation structure can solve the problem of soft soil foundation to a certain extent, the pile foundation structure is easy to displace in deep water and may influence the use of a wharf to a certain extent; the immersed large-diameter thin-wall structure can fully utilize the bearing capacity of a soil body on the premise of not excavating a soft foundation, and is better suitable for various bad foundations, but the existing immersed large-diameter thin-wall structure also has the defect of poor integral rigidity and needs to be improved.

Disclosure of Invention

The invention aims to provide a code head structure with higher overall rigidity. According to the invention, the suction bucket foundation is combined with the round caisson structure, so that the advantages of large integral rigidity and good durability of the gravity type caisson are fully utilized while the excellent bearing characteristic of the suction bucket on the soft soil foundation is exerted.

The technical scheme is as follows:

a suction bucket and round caisson integral prefabricated construction method of the new offshore deepwater wharf, the wharf constructed includes at least one unit, each unit includes the cover plate of the wharf, suction bucket and round caisson, characterized by, in the cover plate of the wharf locates at round caisson, suction bucket and round caisson separate through the basic cover plate; the suction barrel comprises a lower inner barrel, a lower outer barrel and a lower cross-shaped inner partition plate, the round caisson comprises an upper inner barrel, an upper inner barrel and an upper cross-shaped inner partition plate, the lower inner barrel and the upper inner barrel are consistent in size and corresponding in position, the lower outer barrel and the upper outer barrel are consistent in size and corresponding in position, and the construction method comprises the following steps:

(1) manufacturing a transportation bottom plate, and taking the transportation bottom plate as a platform mould of the integral prefabricated structure;

(2) by taking reference to the prefabrication and shipment method of the caisson, the lower inner barrel, the lower outer barrel and the lower cross-shaped inner partition plate of the suction barrel are integrally prefabricated on the transportation bottom plate by adopting a sliding-lifting type template technology;

(3) casting a foundation cover plate in situ;

(4) integrally prefabricating an upper inner barrel, an upper inner barrel and an upper cross-shaped inner partition plate of the round caisson by adopting a sliding template method;

(5) the transportation bottom plate and the wharf structure on the transportation bottom plate are transported out of the prefabricated yard integrally by an air bag jacking and transporting construction means, and the wharf structure is transported to a construction site by referring to a hauling mode of the round caisson;

(6) sinking the wharf structure by using a negative pressure sinking process, and installing a wharf cover plate, a wave blocking wall and a wheel protecting ridge on site.

Preferably, the upper outer drum is provided with a groove on one side and a cooperating lug on the other side, and when the dock is formed of a plurality of units, adjacent grooves and lugs form a cavity when two adjacent units are butted.

A section of the outer barrel wall from a designed low water level to the top end of the upper outer barrel is provided with a local thickened part, and the local thickened part and the side surface of the wharf cover plate form a plane.

A wave wall and a wheel protecting bank are arranged on the wharf cover plate.

The suction bucket and the novel offshore deep water wharf structure integrally prefabricated with the round caisson are relatively uniform in overall stress, and if the upper bucket wall is appropriately perforated, the suction bucket can be made into a through type, so that the wave force is reduced. If no hole is formed, the wharf berth can be arranged on the side of the wharf close to the shore, and the side close to the sea also serves as a breakwater, so that the mooring stability of the ship in the berth is greatly improved, the respective advantages of a thin-wall submerged foundation and a round caisson are effectively combined, and the method has a good application prospect in a muddy coast. Meanwhile, the operation time on the offshore site is relatively short because the main body part of the structure is integrally prefabricated in a prefabrication field.

Drawings

FIG. 1 is a sectional view of the structure

FIG. 2 is a top view of the structure;

FIG. 3A-A is a cross-sectional view;

FIG. 4B-B is a cross-sectional view;

fig. 5 is a perspective view of the structure.

In the figure: 1-outer barrel, 2-inner barrel, 3-cross inner partition plate, 4-basic cover plate, 5-wharf cover plate, 6-wave wall, 7-wheel guard ridge, 8-groove lug and 9-local thickened part

Detailed Description

The invention is described below with reference to the accompanying drawings and examples.

Each group of the novel offshore deep water wharf structure with the integrally prefabricated suction barrel and round caisson comprises a reinforced concrete outer barrel 1, an inner barrel 2, a cross inner partition plate 3, a foundation cover plate 4, a wharf cover plate 5, a wave blocking wall 6, a guard sill 7 and wharf upper facilities. The lower suction barrel (including the

parts

1, 2 and 3 below 4) sinks into the soft soil foundation to provide bearing capacity; the base deck 4 and above is a round caisson (

sections

1, 2 and 3 above 4) that provides a platform for quay operations and vessel berthing. To facilitate the docking and installation of the quay crash, a section of the outer barrel wall from the design low water level to the top of the barrel is thickened appropriately to form a local thickened portion 9, which is made planar with the side of the quay cover 5. The indirect seam of the adjacent upper outer barrel 1 is treated, groove lugs 8 are arranged on two sides of the upper part of the outer barrel 1, the adjacent groove lugs 8 are butted to form a cavity, and concrete or filling block stones are poured in the cavity.

This new structure can be prefabricated and constructed in the following order: firstly, a transportation bottom plate is manufactured and simultaneously used as a platform die for integral prefabrication of a structure, then a prefabrication and delivery method of a large caisson is used for reference, an inner barrel, an outer barrel and a cross-shaped inner baffle plate 3 at the lower part are integrally prefabricated on the transportation bottom plate by adopting a sliding type template technology, then a foundation cover plate 4 is cast in place, an inner barrel, an outer barrel and a cross-shaped inner baffle plate 3 at the upper part are integrally prefabricated by adopting the sliding type template technology again, the inner barrel, the outer barrel and the cross-shaped inner baffle plate 3 at the upper part are integrally delivered from a prefabrication field by adopting construction technologies such as air bag jacking and delivery, the structure is delivered to a construction site by referring to a towing mode of the round caisson, then the structure is submerged by utilizing a negative pressure sinking process, and then a wharf cover plate 5, a wave wall 6, a wheel guard 7 and facilities at the.

Claims

1. A suction bucket and round caisson integral prefabrication type construction method of offshore deepwater wharf, the wharf constructed includes at least one unit, each unit includes the cover plate of the wharf, suction bucket and round caisson, characterized by, in the cover plate of the wharf locates at round caisson, suction bucket and round caisson separate through the basic cover plate; the suction barrel comprises a lower inner barrel, a lower outer barrel and a lower cross-shaped inner partition plate, the round caisson comprises an upper inner barrel, an upper inner barrel and an upper cross-shaped inner partition plate, the lower inner barrel and the upper inner barrel are consistent in size and corresponding in position, the lower outer barrel and the upper outer barrel are consistent in size and corresponding in position, and the construction method comprises the following steps:

(3) casting a foundation cover plate in situ;

2. The dock of claim 1, wherein the upper outer drum is provided with a recess on one side and a cooperating lug on the other side, and wherein when the dock is formed of a plurality of units, adjacent recesses and lugs form a cavity when two adjacent units are mated.

3. The dock of claim 1, wherein a partial thickened portion is provided to a section of the outer drum wall from the design low water level to the top of the upper outer drum, the partial thickened portion forming a flat surface with the side of the dock cover plate.

4. The dock of claim 1, wherein a wave wall and a berm are provided on the dock cover.