Steel open caisson supporting cushion device in deepwater environment

Abstract

The utility model provides a supporting cushion device for a steel open caisson in a deepwater environment. The supporting cushion device comprises a grouting capsule and a capsule flange, the capsule flange is connected between the open caisson and the grouting capsule; a connecting bolt hole, an internal thread grouting hole and an internal thread vent hole are formed in the side, facing the capsule flange, of the grouting capsule. The grouting pipe and the breather pipe respectively penetrate through the open caisson and the capsule flange and then are connected with the internal thread grouting hole and the internal thread air hole; the side, away from the grouting capsule, of the grouting pipe is connected with a grouting machine. And the grouting capsule is fixedly connected with the capsule flange through the connecting bolt hole.

Description

Technical Field

[0001] This utility model relates to the field of construction, and in particular to a steel caisson support device for deep-water environments. Background Technology

[0002] Placing prefabricated bridge foundations onto a prepared underwater subgrade via floating transport is called foundation setting, which can also be understood as an enlarged foundation placed on a pre-treated subgrade in deep water. Foundation setting generally has self-floating capability, and its core is the prefabrication of parts or the entire foundation on shore or in a dock. The main preparatory work on site is subgrade preparation. Prefabricated caisson foundations are one form of foundation setting. They are transported to the pier location by floating or by ship, precisely positioned, and then gradually sunk onto the prepared subgrade to form the foundation. Because they can be manufactured as a whole or in sections on shore or in a dock, and can be carried out in parallel with the subgrade preparation at the pier location, they ensure quality and save construction time, making them particularly suitable for deep-water bridges in harsh construction environments, especially cross-sea bridge projects. After the prefabricated caisson foundation is transported to the pier location and its horizontal and vertical alignment is precisely adjusted, the key to the success of the prefabricated caisson foundation construction lies in how to achieve the transition from a floating state to a stable rigid support on the river (sea) bed.

[0003] Existing Case 1: Chinese Utility Model Patent Specification CN201510915457.X discloses a construction method for a set-type caisson foundation suitable for deep-water bare rock. In this construction method, the support conversion structure consists of multiple steel pipe supports set on the set-type foundation. The verticality of the caisson is adjusted by the coordinated operation of the steel pipe supports. After the adjustment is completed, a movable baffle is set at the bottom of the foundation. The movable baffle automatically extends and retracts up and down to adapt to the unevenness of the bottom of the rock foundation pit. Then, sealing concrete is poured to complete the foundation support conversion.

[0004] Existing Case Two: Chinese Utility Model Patent Specification CN109797759B discloses a biomimetic cofferdam for marine rock surfaces and its construction method. This method involves: firstly, surveying the river (sea) bed cross-section; secondly, manufacturing the cofferdam side panels in sections; and thirdly, meticulously designing the height of each side panel and the bottom skirt of the side panel based on the surveyed river (sea) bed rock surface elevation and undulations. After the side panels are lowered, ton bags are stacked on the outside, and then bottom sealing concrete is poured to complete the cofferdam's support system conversion. Existing Case One is mainly applicable to shallow inland rivers with caisson foundations. When the water depth exceeds a certain level, the strength and rigidity requirements of the supporting structure are high. In Case 1, the steel pipe supports have relatively low bending stiffness, and their vertical bearing capacity is uncertain due to the leveling quality of the river (sea) bed, making it difficult to meet the rigid support requirements of the caisson foundation under harsh sea conditions. Secondly, Case 1 requires high precision in leveling the rock foundation pit. Although movable baffles have been installed, their limited adjustment range necessitates extensive deep-sea diving for leak sealing. Thirdly, the coordinated adjustment of multiple steel pipe supports is labor-intensive and takes 4-5 days. Sealing concrete construction can only proceed after the support adjustments are completed, taking 45-60 days. Only after the sealing concrete reaches its strength can the temporary steel pipe support system be completely withdrawn from operation. In Case 2, theoretically, the foundation bottom can be aligned with the river (sea) bed before the sealing concrete is poured. However, this is significantly affected by water depth, flow velocity, scouring, and existing measurement techniques. Deviations between the base measurement results and the actual river (sea) bed elevation are inevitable, resulting in the cofferdam not being able to fully and tightly support the river (sea) bed. Large support gaps also require extensive deep-sea diving for leak sealing. Secondly, the scale of the cofferdam is not large and the supporting reaction force is very small. Its technical indicators and supporting structure form are difficult to meet the requirements of rigid support for set-type foundations.

[0005] Existing cases one and two utilize supporting steel pipe piles or side plates supported on the riverbed to achieve the conversion of the set-type caisson foundation (cofferdam) from floating state to temporary fixed support. However, the conversion method used in the above-mentioned existing cases has the following main drawbacks: the attitude adjustment is complicated and the conversion of temporary support takes a long time; the temporary support has high requirements for the flatness of the river (sea) bed, and improper handling may lead to support failure and safety accidents; the temporary support has low stiffness, poor environmental adaptability, and very low feasibility for use in complex sea conditions. Utility Model Content

[0006] The main technical problem to be solved by this utility model is to provide a steel caisson support device for deep water environments, which can quickly provide support after the caisson sinks, ensure the stability of the caisson's posture, and guide on-site construction.

[0007] To solve the above-mentioned technical problems, this utility model provides a steel caisson support device for deep-water environments, comprising: a grouting capsule and a capsule flange; the capsule flange is connected between the caisson and the grouting capsule;

[0008] The grouting capsule has a connecting bolt hole, an internal threaded grouting hole, and an internal threaded vent hole on the side facing the capsule flange; the grouting pipe and the vent pipe pass through the caisson and the capsule flange respectively and are connected to the internal threaded grouting hole and the internal threaded vent hole; the side of the grouting pipe away from the grouting capsule is connected to the grouting machine.

[0009] The grouting capsule is fixedly connected to the capsule flange through connecting bolt holes.

[0010] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0011] This utility model provides a steel caisson support device for deep-water environments. The device is easy to operate, has a good forming effect, and a good support effect. It can quickly provide support after the caisson sinks, ensuring the stability of the caisson's posture and can guide on-site construction. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the injection capsule in a preferred embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the capsule flange in a preferred embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the installation of a preferred embodiment of the present invention. Detailed Implementation

[0015] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0016] refer to Figures 1-3 This embodiment provides a steel caisson support device for deep-water environments, including: a grouting capsule 1 and a capsule flange 2; the capsule flange 2 is connected between the caisson and the grouting capsule 1;

[0017] The grouting capsule 1 is provided with a connecting bolt hole 11, an internal thread grouting hole 12 and an internal thread vent hole 13 on the side facing the capsule flange 2; the grouting pipe 3 and the vent pipe 4 pass through the caisson 5 and the capsule flange 2 respectively and are connected to the internal thread grouting hole 12 and the internal thread vent hole; the side of the grouting pipe 3 away from the grouting capsule 1 is connected to the grouting machine.

[0018] The grouting capsule 1 is fixedly connected to the capsule flange 2 through the connecting bolt hole 11.

[0019] This embodiment provides a steel caisson support device for deep-water environments. Traditional support devices are located at the bottom of the caisson 5, in deep water, and the sea conditions are complex. Supporting the caisson requires divers to work underwater for a long time. In addition, the steel pipe support is heavy, making underwater operation inconvenient and dangerous. The device in this embodiment, by grouting downwards from the water surface, can not only ensure the safety of construction personnel and the actual effect of the support, but also improve construction efficiency.

[0020] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A steel caisson support device for deep-water environments, characterized in that... include: Grouting capsule and capsule flange; the capsule flange connects the caisson and the grouting capsule; The grouting capsule has a connecting bolt hole, an internal threaded grouting hole, and an internal threaded vent hole on the side facing the capsule flange; the grouting pipe and the vent pipe pass through the caisson and the capsule flange respectively and are connected to the internal threaded grouting hole and the internal threaded vent hole; the side of the grouting pipe away from the grouting capsule is connected to the grouting machine. The grouting capsule is fixedly connected to the capsule flange through connecting bolt holes.

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