Pin bar riveting type guide pipe for underwater concrete pouring

Abstract

The utility model relates to the technical field of concrete conduits, and discloses a pin bar riveting type conduit for underwater concrete pouring, which comprises a lower conduit, the inner wall of the top of the lower conduit is in contact with an upper conduit, and the lower conduit is provided with a dismounting mechanism; the dismounting mechanism comprises a connecting groove formed in the front side of the lower guide pipe, a positioning groove is formed in the front side of the bottom of the upper guide pipe, a supporting ring is fixedly connected to the outer arc face of the upper guide pipe, a connecting ring is fixedly connected to the outer arc face of the bottom end of the lower guide pipe, and a sealing groove is formed in the inner side of the lower guide pipe. And the size of the connecting groove is matched with that of the positioning groove. According to the utility model, the connecting groove and the positioning groove between the upper guide pipe and the lower guide pipe are aligned, and the pin strip is inserted for riveting, so that the time from hole forming to concrete pouring is shortened, the stability of the hole wall is facilitated, the sediment thickness of the hole bottom is reduced, the pile forming quality is ensured, and the overall working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete conduit technology, and in particular to a pin-riveted underwater concrete pouring conduit. Background Technology

[0002] A duct for underwater concrete pouring is a tubular device used in underwater concrete pouring construction to transport concrete from the ground to the underwater pouring site, ensuring that the concrete is isolated from water during the pouring process, so that the concrete can be poured smoothly and densely.

[0003] When using guide pipes, threaded connections are required between the two sets of guide pipe joints. For example, in the East Coast Rail Link (ECRL) project in Malaysia, which traverses the Malaysian Peninsula from east to west, one section is located at the project's starting point, from chainage CH0+000 to CH21+004, with a total length of 21km. It includes 13.09km of bridges (8 bridges) and 1 elevated station, representing 62.3% of the total length. Some bridge foundations utilize Φ1.2m end-bearing bored piles, totaling 273 piles, with a maximum designed pile length of 48m. Due to the poor geological conditions, the soil above the rock penetration point of the end-bearing piles is mostly sandy. The casing length during construction is approximately 12m, while the depth into the rock strata exceeds 18m, with sections lacking casing protection. For sections with generally poor geological conditions, the construction time for both the reinforcement cage and guide pipe installation is crucial for the stability of the borehole wall and the detection of sediment thickness before concrete pouring.

[0004] However, when using threaded connections for two sets of conduit joints, the installation and disassembly process is cumbersome and prone to leakage, which has an adverse effect on the stability of the borehole wall in areas with poor geology, posing a potential risk to the quality of pile formation. At the same time, the construction efficiency is low. Therefore, a pin-riveted underwater concrete duct is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a pin-riveted underwater concrete pouring conduit, which aims to improve the problem that connecting two sets of conduits by threads in the prior art is cumbersome and prone to leakage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pin-riveted underwater concrete pouring guide pipe, including a lower guide pipe, wherein the upper guide pipe is in contact with the top inner wall of the lower guide pipe, and the lower guide pipe is provided with a disassembly mechanism.

[0007] The disassembly mechanism includes a connecting groove on the front side of the lower conduit, a positioning groove on the bottom front side of the upper conduit, a support ring fixedly connected to the outer arc surface of the upper conduit, a connecting ring fixedly connected to the bottom outer arc surface of the lower conduit, and a sealing groove on the inner side of the lower conduit.

[0008] As a further description of the above technical solution:

[0009] The dimensions of the connecting groove match the dimensions of the positioning groove.

[0010] As a further description of the above technical solution:

[0011] Both the support ring and the connecting ring have a T-shaped cross-section.

[0012] This utility model has the following beneficial effects:

[0013] 1. In this utility model, through the cooperation between the upper guide tube, the lower guide tube and their disassembly mechanism, the connecting groove and positioning groove between the upper guide tube and the lower guide tube are aligned, and a pin is inserted for riveting. This reduces the time from hole formation to concrete pouring, which is beneficial to the stability of the hole wall, reduces the thickness of sediment at the bottom of the hole, avoids the waste of secondary hole cleaning caused by excessive sediment thickness at the bottom of the hole, and ensures the quality of pile formation and improves the overall work efficiency.

[0014] 2. In this utility model, the sealing groove can improve the sealing performance between the upper and lower conduits and reduce the possibility of leakage. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a pin-riveted underwater concrete pouring conduit proposed in this utility model.

[0016] Figure 2 This utility model provides a schematic diagram showing the disassembled upper and lower guide tubes of a pin-riveted underwater concrete pouring guide tube.

[0017] Figure 3 This is a schematic diagram of the internal cross-section of the upper guide tube of a pin-riveted underwater concrete pouring guide tube proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of the internal cross-section of the lower guide tube of a pin-riveted underwater concrete pouring guide tube proposed in this utility model.

[0019] Legend:

[0020] 1. Upper guide tube; 2. Lower guide tube; 3. Disassembly mechanism; 301. Connecting groove; 302. Positioning groove; 303. Connecting ring; 304. Support ring; 305. Sealing groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-3 This utility model provides an embodiment of a pin-riveted underwater concrete pouring conduit, including a lower conduit 2. The upper conduit 1 is in contact with the inner top wall of the lower conduit 2. The lower conduit 2 is provided with a disassembly mechanism 3. The disassembly mechanism 3 facilitates the installation or disassembly of the upper conduit 1 and the lower conduit 2, thereby improving the overall work efficiency. The disassembly mechanism 3 includes a connecting groove 301 on the front side of the lower conduit 2 and a positioning groove 302 on the front bottom side of the upper conduit 1. The diameter of the connecting groove 301 and the positioning groove 302 is 12mm, and a pin with a diameter of 12mm can be inserted between them. A support ring 304 is fixedly connected to the outer arc surface of the upper conduit 1, and a connecting ring 303 is fixedly connected to the outer arc surface of the bottom end of the lower conduit 2. The support ring 304 and the connecting ring 303 can improve the compressive strength of the upper conduit 1 and the lower conduit 2. A sealing groove 305 is provided on the inner side of the lower conduit 2. The sealing groove 305 can be used to install a corresponding sealing ring to achieve a sealing effect.

[0023] Reference Figure 4 The dimensions of the connecting groove 301 and the positioning groove 302 are matched. When the connecting groove 301 and the positioning groove 302 are aligned, a pin can be inserted and then riveted. The cross-sections of the support ring 304 and the connecting ring 303 are both set to T-shape. The cross-sectional area of ​​the T-shape is larger and can withstand pressure better than the ordinary shape, thereby protecting the connection between the upper conduit 1 and the lower conduit 2.

[0024] Working principle: Watertightness test of the conduit. Based on the theoretical calculation formula, the test is conducted at a pressure not less than 1.3 times the maximum water depth in the borehole, and not less than 1.3 times the maximum internal pressure during concrete pouring; the water head height inside the pipe is considered based on the maximum borehole depth. After the water tightness test of the conduit is passed under the supervision of the supervisor and the pipe section is marked, it can be put into use. Then, the installation operation is carried out. During installation, the lower conduit 2 pipe section is hoisted onto the chuck at the top of the casing. Then, the sealing ring is installed in the sealing groove 305 of the lower conduit 2. Then, the upper conduit 1 is hoisted, and the upper and lower conduit joints are centered and aligned. At this time, the connecting groove 301 and the positioning groove 302 are aligned, and then the connecting pin is inserted to connect the conduits. At this time, the bottom of the upper conduit 1 is pressed against the sealing ring to ensure the seal between the two. The next conduit section is installed in sequence. When the conduit is removed, according to the specification requirement of 2-6m conduit burial depth, the elevation of the top surface of the concrete in the hole is measured in time during the concrete pouring process. If the conduit exceeds the conduit burial depth requirement, the conduit is removed in time: pull out the conduit section to be removed and place it on the chuck at the top of the casing → remove the conduit connecting pin → hoist the removed pipe section to the conduit frame for cleaning and storage → connect the hopper and continue pouring. Repeat the above steps until the concrete pouring is completed.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pin-riveted underwater concrete pouring guide pipe, comprising a lower guide pipe (2), characterized in that: The upper conduit (1) is in contact with the inner wall of the top of the lower conduit (2), and the lower conduit (2) is provided with a disassembly mechanism (3). The disassembly mechanism (3) includes a connecting groove (301) on the front side of the lower conduit (2), a positioning groove (302) on the bottom front side of the upper conduit (1), a support ring (304) fixedly connected to the outer arc surface of the upper conduit (1), a connecting ring (303) fixedly connected to the bottom outer arc surface of the lower conduit (2), and a sealing groove (305) on the inner side of the lower conduit (2).

2. The pin-riveted underwater concrete pouring guide pipe according to claim 1, characterized in that: The dimensions of the connecting groove (301) match the dimensions of the positioning groove (302).

3. The pin-riveted underwater concrete pouring guide pipe according to claim 1, characterized in that: The cross-sections of both the support ring (304) and the connecting ring (303) are T-shaped.

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