Nozzle baffle connecting device for open caisson
By setting a nozzle baffle connection device of angle steel and connecting parts in the caisson, the problems of large sinking friction and soil wall collapse of the caisson are solved, the effective deflection of mud and the formation of thixotropic sleeve are achieved, and the construction efficiency is improved.
Patent Information
- Application Number
- CN202422672599.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-04
AI Technical Summary
During the final sinking stage, the caisson is prone to problems such as excessive friction making it difficult to sink, and the mud outlet causing partial collapse of the soil wall.
A nozzle baffle connection device is designed, which is fixed to the well wall using angle steel and connecting parts. The bottom edge of the angle steel is located below the grouting pipe outlet to prevent mud from directly rushing into the soil wall. The design of the angle steel can redirect the slurry flow and reduce soil wall collapse.
It effectively prevents mud from rushing directly into the soil wall, reduces local collapse of the soil wall, reduces the impact on the surrounding environment, promotes the formation of thixotropic mud jacket, and improves the sinking efficiency of the caisson.
Smart Images
Figure CN223329874U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of caisson construction, and in particular comprises a nozzle baffle connecting device for caisson. Background Art
[0002] With the development of urban spaces and the continuous improvement of construction technology, the development of multi-story underground spaces is increasing, and the use of caissons in retaining structures is becoming increasingly widespread. Due to the influence of the surrounding soil, caissons are prone to excessive friction and difficulty in sinking during the final sinking phase. Thixotropic slurry sleeves are often used in engineering to reduce friction between the soil and the caisson. To prevent slurry from slurry outlets at the slurry storage steps from directly impacting the soil wall, angle steel is often placed on the slurry storage steps.
[0003] When using a thixotropic slurry sleeve to aid sinking, the slurry outlet is not only set at the outlet step, but also at the middle of the caisson. The middle outlet also has the problem of slurry directly rushing into the soil wall, causing local collapse of the soil wall.
[0004] Therefore, there is an urgent need for a mud anti-direct impact structure for caisson to overcome the above problems. Utility Model Content
[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a nozzle baffle connecting device for a caisson.
[0006] This nozzle baffle connection device for caisson is located on the slurry storage step at the caisson blade foot or on the outside of the well wall in the middle of the caisson, and includes an angle steel and a connecting piece; the angle steel is fixedly connected to the well wall through the connecting piece, and the bottom edge of the angle steel is located below the corresponding grouting pipe outlet;
[0007] There are vertical steel bars in the well wall. One end of the connecting piece in the nozzle baffle connecting device in the middle of the caisson is connected to the vertical steel bars in the well wall, and the other end extends horizontally to connect the vertical plate of the angle steel. The bottom plate of the angle steel is located below the grouting pipe outlet in the middle of the caisson.
[0008] Preferably, one end of the connecting piece fixed in the well wall is provided with a hole for the steel bar to pass through.
[0009] Preferably, in the radial direction of the caisson, the vertical side of the angle steel is flush with the edge of the slurry storage step, and the angle steel positions in the nozzle baffle connection device on the slurry storage step and in the middle of the caisson are the same.
[0010] Preferably, an outrigger is provided at one end where the connector is connected to the angle steel, and angle steel connection holes are provided at both the vertical plate and bottom plate ends of the angle steel, through which the outrigger passes and is fixed by a nut.
[0011] Preferably, the connector is fixed to the steel bar by hinges and latches.
[0012] The beneficial effects of the utility model are:
[0013] 1) The utility model sets an angle steel as a nozzle baffle. By setting angle steel connection holes on the vertical side and bottom side ends of the angle steel, the connecting piece can be vertically installed on the slurry storage step at the caisson blade foot and horizontally installed in the middle of the caisson. A connection device structure is proposed in which the angle steel is set on the slurry storage step at the caisson blade foot or in the middle of the caisson.
[0014] 2) The utility model uses the vertical edge of the angle steel as a nozzle baffle to prevent the pressurized mud from the grouting port from scouring the surrounding soil and causing local collapse of the soil wall, thereby reducing the impact on the surrounding environment. The bottom edge of the angle steel is used to assist the slurry to turn after it rushes out and flow upward, which is conducive to the formation of a thixotropic mud sleeve above the slurry outlet. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is an overall cross-sectional view of the nozzle baffle connection device;
[0016] Figure 2 Schematic diagram of angle steel.
[0017] Explanation of the accompanying reference numerals: well wall 1, steel bar 2, grouting pipe 3, angle steel 4, connecting piece 5, angle steel connecting hole 6, nut 7. DETAILED DESCRIPTION
[0018] The present invention will be further described below with reference to the following embodiments. The following embodiments are provided solely to facilitate understanding of the present invention. It should be noted that, within the scope of the present invention, modifications may be made by a person skilled in the art without departing from the principles of the present invention. Such improvements and modifications are also within the scope of the claims of the present invention.
[0019] Example 1
[0020] As an example, Figure 1 and Figure 2 As shown, the well wall 1 is the side wall of the caisson, and a slurry storage step is provided at the lower cutting foot; a grouting pipe 3 is installed in the well wall, which is arranged according to the actual situation of the project, generally at the slurry storage step. If the caisson is too deep, another layer can be set in the middle of the caisson. The thixotropic mud enters between the caisson and the soil layer through the grouting pipe 3 to assist sinking.
[0021] This nozzle baffle connection device for caisson corresponds to the slurry outlet position of the grouting pipe 3 on the well wall 1, and is arranged on the slurry storage step at the caisson blade foot or outside the well wall 1 in the middle of the caisson.
[0022] In this embodiment, it is proposed that for the nozzle baffle connection device provided on the slurry storage step at the cutting edge of the caisson:
[0023] Angle steel 4 is used as a nozzle baffle to prevent the slurry from directly rushing into the soil wall and causing local collapse of the wall. The angle steel 4 is fixedly connected to the well wall 1 through a connecting piece 5, and the bottom edge of the angle steel 4 is arranged below the outlet of the corresponding grouting pipe 3; in the radial direction of the caisson, the vertical side of the angle steel 4 is flush with the edge of the slurry storage step.
[0024] like Figure 2 As shown, angle steel connection holes 6 are provided at the ends of the vertical plate and the bottom plate of the angle steel 4.
[0025] An outrigger is provided at one end of the connection between the connector 5 and the angle steel 4. For the nozzle baffle connection device on the slurry storage step at the cutting edge of the caisson, the outrigger passes through the angle steel connection hole 6 on the bottom plate of the angle steel 4 and is fixed by a nut 7.
[0026] The connecting piece 5 is fixed to the steel bar 2 by hinges and pins. The steel bar 2 is the main structural steel bar of the caisson. One end of the connecting piece 5 fixed in the well wall 1 is provided with a hole for the steel bar 2 to pass through. The steel bar 2 passes through the connecting piece 5, so that the mud rushes out from the grouting port and impacts the vertical plate of the angle steel 4 without causing the angle steel 4 to move.
[0027] Example 2
[0028] As another embodiment, this embodiment 2 is proposed on the basis of embodiment 1. When the nozzle baffle connecting device for caisson is installed on the outside of the well wall 1 in the middle of the caisson:
[0029] Steel bars 2 are vertically provided in the well wall 1. One end of the connecting piece 5 in the nozzle baffle connecting device in the middle of the caisson is connected to the vertical steel bars 2 in the well wall 1, and the other end extends horizontally to the angle steel connecting hole 6 on the vertical plate of the connecting angle steel 4 and is fixed by a nut 7, so that the angle steel 4 is arranged in the air.
[0030] In the radial direction of the caisson, the angle steel 4 on the slurry storage step is in the same position as the angle steel 4 in the nozzle baffle connecting device in the middle of the caisson. The bottom plate of the angle steel 4 is located below the grouting pipe 3 outlet in the middle of the caisson.
[0031] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.
[0032] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
Claims
1. A nozzle baffle connection device for a caisson, characterized by: It is located on the slurry storage step at the caisson blade or on the outside of the well wall in the middle of the caisson, and includes angle steel and connectors; the angle steel is fixedly connected to the well wall through the connector, and the bottom edge of the angle steel is located below the corresponding grouting pipe outlet; There are vertical steel bars in the well wall. One end of the connecting piece in the nozzle baffle connecting device in the middle of the caisson is connected to the vertical steel bars in the well wall, and the other end extends horizontally to connect the vertical plate of the angle steel. The bottom plate of the angle steel is located below the grouting pipe outlet in the middle of the caisson.
2. The nozzle baffle connection device for caisson according to claim 1, characterized in that: One end of the connecting piece fixed in the well wall is provided with a hole for the steel bar to pass through.
3. The nozzle baffle connection device for caisson according to claim 2, characterized in that: In the radial direction of the caisson, the vertical side of the angle steel is flush with the edge of the slurry storage step, and the angle steel positions in the nozzle baffle connecting device on the slurry storage step and in the middle of the caisson are the same.
4. The nozzle baffle connection device for caisson according to claim 1, characterized in that: An outrigger is provided at one end of the connecting piece and the angle steel. Angle steel connection holes are provided at the ends of the vertical plate and the bottom plate of the angle steel. The outrigger passes through the angle steel connection holes and is fixed by nuts.
5. The nozzle baffle connection device for caisson according to claim 1, characterized in that: The connector is fixed to the steel bar by hinges and pins.