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Caisson for silty water tidal flat and its installation method

An installation method and silt-based technology, applied in caissons, buildings, infrastructure engineering, etc., can solve the problems of long construction period, difficult control of the sinking process, and excessive sinking speed, and achieve high verticality and stability, sinking The effect of easy well installation and convenient construction

Inactive Publication Date: 2020-12-04
INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of cofferdams in the water may cause water flow to be compressed or change the river course, which will affect the stability of the island itself
[0003] When caissons are implemented on mudflats in muddy waters, in addition to the above-mentioned problems, there are also characteristics such as poor bearing capacity and high water content of the silt layer, which are prone to sudden sinking, excessive sinking speed and sinking during the caissoning process. Problems such as well inclination make it difficult to control the sinking process
Moreover, in order to prevent the center of gravity of the caisson from being too high to control the sinking, there is a limit on the height of the prefabricated caisson, which increases the number of prefabricated caissons and results in a long construction period

Method used

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  • Caisson for silty water tidal flat and its installation method
  • Caisson for silty water tidal flat and its installation method
  • Caisson for silty water tidal flat and its installation method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] refer to Figure 1-2 , is a caisson structure for silty water tidal flats, comprising a caisson 1, a foundation platform 2 provided with a watertight cabin 18, and a caisson hole 3 and a supporting mechanism for accommodating the caisson 1 are arranged on the foundation platform 2, wherein The support mechanism includes a number of support columns 4 and corresponding support column platforms 5, and the support columns 4 are respectively provided with lifting counterpressure devices 6, and a steel structure support 7 at the top of the caisson 1 is arranged between the lifting counterpressure devices 6 . The foundation platform 2 is provided with an explosive conduit 8, which can fill the foundation with explosives for blasting, and can drain water and compact the foundation. The basic platform 2 is provided with a self-correcting mechanism 9, which can automatically adjust the balance of the platform when it sinks and sits on the bottom. The support columns 4 can be st...

Embodiment 2

[0047] refer to Figure 3-4, is another caisson structure for silty water tidal flats, including a caisson 1, a foundation platform 2 provided with a watertight cabin 18, and a caisson hole 3 for accommodating the caisson 1 and a supporting mechanism are arranged on the foundation platform 2, The support mechanism includes several support columns 4 and corresponding support column platforms 5, and the support columns 4 are respectively provided with lifting counterpressure devices 6, and a steel structure support at the top of the caisson 1 is arranged between the lifting counterpressure devices 6. 7. A reserved hole 10 is provided on the foundation platform 2, and the caisson 3 and the supporting column cap 5 are respectively located in the reserved hole 10. The basic platform 2 is provided with a self-correcting mechanism 9, which can automatically adjust the balance of the platform when it sinks and sits on the bottom. The support columns 4 can be steel pipe piles or conc...

Embodiment 3

[0057] refer to Figure 5-8 , is another caisson structure for silty water tidal flats, including a caisson 1 and a foundation platform 2, and the foundation platform 2 is provided with a caisson hole 3 for accommodating the caisson 1 and a supporting mechanism. It differs from Embodiment 1 in that: the foundation platform 2 is provided with a reserved channel 11 extending along the side and communicating with the caisson 3 . The caisson 1 can enter the caisson hole 3 along the reserved passage 11, which is convenient for the installation of the high-size caisson 1 and the removal and reuse of the foundation platform 2, thereby reducing costs. An enclosure member 12 or an additional plate 13 is provided on the reserved channel 11 .

[0058] The difference between the installation method of the caisson structure for the silty waters tidal flats of this embodiment and embodiment 1 is that: in step 2, the step of installing the caisson 1 into the caisson hole 3 along the reserve...

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PUM

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Abstract

The invention discloses a sunk well for a muddy water mud flat and a mounting method thereof. The mounting method comprises the steps of (1) prefabricating a foundation platform provided with a sunk well hole, transporting the foundation platform to a mounting site, and supporting the bottom of the foundation platform; (2) arranging a supporting structure, and mounting the sunk well in the sunk well hole; (3) digging soil in the sunk well, and allowing the sunk well sink to a preset depth through utilizing a lifting back pressure device; (4) prefabricating on site or hoisting a next section of the sunk well, and connecting the next section with the former sunk well; (5) repeating the steps of (3) and (4) till the sunk well sinks to a designed depth at the bottom; (6) carrying out grouting in the sunk well for bottom sealing; and (7) completing the mounting of the sunk well. The mounting method has the advantages that the foundation platform can be prefabricated on land, the on-site mounting is convenient, the foundation is stable, the sunk well mounting is easy, the limitation that the height of the sunk well is limited due to the fact that the center of gravity of the sunk well is high can be overcome, the number of the prefabricated well sections is decreased, the sinking perpendicularity and stability of the sunk well are high, and the construction is convenient.

Description

technical field [0001] The invention relates to the technical field of caisson construction, in particular to the construction of caissons on mud flat foundations in muddy water areas. Background technique [0002] The caisson is a well-shaped structure. By continuously excavating soil from the well, the caisson will overcome the frictional resistance of the well wall by its own weight and sink to the design elevation, and then pour concrete to make it a bridge pier or other structure. Base. When making caissons, if you encounter a weak foundation that does not meet the bearing capacity, you need to take foundation reinforcement measures for the soft foundation. When the water depth is within 3-4 meters and the water flow rate is not high, it is usually used to build the island first, then make the caisson and carry out operations such as caisson sinking on the island. Building the island requires bulldozing and compaction. When building an island on a slope or a soft sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D23/00E02D23/08
CPCE02D23/00E02D23/08
Inventor 丁桦冯仲文郑瑞芸周秋萍盛国强
Owner INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI