Inclinometer pipe bottom protecting and guiding device suitable for SMW construction method pile construction process

Abstract

The utility model provides a bottom protecting and guiding device suitable for inclinometer installation in the SMW construction method pile construction process, relates to the technical field of foundation pit monitoring, and is used for solving the soil texture problem of each stratum in the process of lowering H-shaped steel so as to improve the survival rate and the installation quality of an inclinometer. The device is composed of a bearing plate, an inclinometer pipe protection sleeve and an eccentric conical guide device, a plurality of bolt positioning holes and U-shaped clamping grooves are formed in the bearing plate, the device can be rapidly fixed, and the bottom of the inclinometer pipe can be effectively protected and the lowering perpendicularity of the inclinometer pipe can be controlled through the inclinometer pipe protection steel sleeve and the eccentric conical guide device; the whole installation process is rapid and convenient, the installation quality of the inclinometer pipe is greatly improved, and a powerful guarantee is provided for follow-up analysis of deformation monitoring data of an enclosure system.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit monitoring, and is a bottom protection and guiding device for installing an inclinometer tube during SMW method pile construction. Background Art

[0002] In recent years, SMW piles have been widely used in some shallow subway access points, municipal pipe corridors and other foundation pits due to their advantages of low cost, wide application range, good water-stopping performance and short construction period. However, their deformation resistance is not as good as that of underground continuous walls and bored cast-in-place piles. Therefore, it is particularly important to monitor the deformation of the retaining piles during construction. During the excavation of the foundation pit, the deformation of the retaining piles is reflected by measuring the changes in the pipe shape each time. Therefore, ensuring the survival rate of the inclinometer tube installation has become the primary task to ensure the quality of the monitoring work.

[0003] The installation of inclinometer tubes for SMW pile construction is influenced by various factors, including the geological environment, the proper mixing depth of the pile, and the quality of the installers. The first two factors can be addressed by reinforcing and improving the bottom device of the inclinometer tube. Currently, it is widely reported in the market that the survival rate of traditional inclinometer tubes installed during SMW pile construction is low, resulting in ineffective monitoring data quality during implementation. The installation quality and survival rate of inclinometer tubes need to be improved. Summary of the Invention

[0004] This utility model aims to address the low survival rate of traditional inclinometer tube installations during SMW pile construction. It provides an improved bottom-mounted inclinometer tube installation device suitable for SMW pile construction in various soil layers. This device utilizes a back-bearing plate and a cylindrical sleeve at the bottom of the inclinometer tube to reduce direct friction between the inclinometer tube and the soil, preventing the inclinometer tube from directly contacting the soil and obstacles. A rectangular mud guide hole is provided on the back of the bearing plate. As the inclinometer tube moves under the H-beam, soil inside the device is drained through the rectangular hole, effectively releasing soil pressure. An eccentric guide conical cap is also added to the bottom to ensure that the inclinometer tube adheres closely to the side of the H-beam wing and the angle of entry into the soil, while also preventing the bottom inclinometer tube from shifting, effectively ensuring the reliability of subsequent monitoring data. This measure significantly improves the survival rate of inclinometer tube installations in SWM piles compared to previous methods where the bottom inclinometer tube was exposed to the outside world.

[0005] The pressure plate is provided with 10 bolt holes and 2 bottom U-shaped groove buckles, through which the device and the H-shaped steel are firmly connected. Later, as the H-shaped steel is recycled, the device can also be recycled and reused. It can be quickly installed and disassembled, thereby improving utilization rate.

[0006] The implementation of the present utility model is composed of the following technical solutions.

[0007] A bottom protection and guiding device for an inclinometer tube used in the SMW pile construction process, comprising a pressure plate and a cylindrical sleeve (6) at the bottom of the inclinometer tube, for protecting and fixing the bottom of the inclinometer tube from deviation, ensuring that the inclinometer tube can be positioned downward in a predetermined angle direction; characterized in that: the pressure plate is provided with 10 bolt positioning grooves, 2 U-shaped groove buckles and 1 back rectangular mud guide hole, and is fixed by two U-shaped groove buckles and bolt holes that match the thickness of the H-shaped steel wing plate and the web; the upper part of the steel protective sleeve is composed of a cylindrical sleeve about 30 cm long that matches the diameter of the inclinometer tube and the lower part is composed of an eccentric guide conical cap about 20 cm long, which effectively ensures the entry angle of the inclinometer tube into the soil and shares most of the resistance from the soil layer.

[0008] The advantages of the present invention are that the inclinometer tube is fastened to the H-shaped steel through the bolt holes on the pressure plate and the U-shaped groove buckle at the bottom, there is no risk of separation during the lowering of the steel, and the subsequent installation and disassembly for secondary use is relatively convenient and more economical; when the interior of the anti-extrusion plate is filled with soil, the rectangular mud guide hole on the back side can effectively drain the soil and pressure inside the device, effectively reducing the internal pressure; at the same time, the eccentric guide conical cap below the device better ensures the entry angle of the inclinometer tube into the soil, and can effectively overcome hard soil layers and obstacles, greatly improving the survival possibility of the inclinometer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a three-dimensional view (front) of the present invention.

[0010] Figure 2 This is a three-dimensional view (back) of the present invention.

[0011] Figure 3 It is a top view of the utility model.

[0012] Figure 4 This is a three-dimensional line drawing (front) of the utility model. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] Figure 1The marks (1) to (10) in the figure are respectively: web plate connection bolt hole (1), wing plate fixing U-shaped groove buckle (2), rectangular mud guide hole (3), right wing plate connection bolt hole (4), bottom eccentric guide conical cap device (5), bottom cylindrical sleeve of inclinometer tube (6), inclinometer tube pressure plate (7), left wing plate connection bolt hole (8), web plate fixing U-shaped groove buckle (9), inclinometer tube steel protection sleeve (10).

[0015] Example: In a specific implementation process, the device works as follows.

[0016] The inclinometer tube pressure plate (7) is assembled and fixed on the wing plate and the web of the H-shaped steel through the web connecting bolt hole (1), the right wing plate connecting bolt hole (4), the left wing plate connecting bolt hole (8), the wing plate fixing U-shaped groove buckle (2), and the web plate fixing U-shaped groove buckle (9). The back of the inclinometer tube pressure plate (7) is facing outward and the rectangular mud guide hole (3) is facing upward. After the pressure plate is fixed, the bottom of the inclinometer tube is placed in the bottom cylindrical sleeve (6) of the inclinometer tube and a soft filler is placed in the bottom of the eccentric guide conical cap device (5). In this way, the bottom of the inclinometer tube is effectively fixed and protected, and the inclinometer tube can be smoothly lowered into place when encountering various strata and obstacles during the SMW construction method pile construction.

[0017] The utility model proposes a bottom protection and guide device suitable for installing an inclinometer tube during SMW pile construction. The device is fixed to the H-shaped steel through the bolt holes of the pressure plate and the U-shaped groove buckle at the bottom. The soil and pressure inside the device are drained in time through the rectangular mud guide holes on the back of the pressure plate, which greatly reduces the damage to the inclinometer tube caused by the pressure on the bottom of the inclinometer tube. At the same time, the device is simple to install and convenient for subsequent secondary use. While improving the survival rate of the inclinometer tube, it also reduces the cost investment in the layout of measuring points.

Claims

1. A bottom protection and guiding device for an inclinometer tube suitable for SMW pile construction, characterized by: The invention comprises an inclinometer tube pressure plate (7), a cylindrical sleeve (6) at the bottom of the inclinometer tube, and an eccentric guide conical cap device (5) at the bottom. The specific connection method is as follows: a. fixing the H-shaped steel wing plate through the right wing plate connecting bolt hole (4) and the left wing plate connecting bolt hole (8); b. fixing the H-shaped steel web plate through the web plate connecting bolt hole (1); c. opening a rectangular mud guide hole (3) with a length and width of about 16 cm*3.5 cm on the back side of the inclinometer tube pressure plate (7); and connecting the bottom of the inclinometer tube pressure plate (7) to the wing plate and web plate at the bottom of the H-shaped steel through the reserved wing plate fixing U-shaped groove buckle (2) and the web plate fixing U-shaped groove buckle (9).

2. The inclinometer tube bottom protection and guiding device suitable for SMW pile construction according to claim 1, characterized in that: The bottom protection and guide device comprises: a right wing plate connecting bolt hole (4), a left wing plate connecting bolt hole (8), a web plate connecting bolt hole (1), a rectangular mud guide hole (3), a wing plate fixing U-shaped groove buckle (2), and a web plate fixing U-shaped groove buckle (9).

3. The inclinometer tube bottom protection and guiding device suitable for SMW pile construction according to claim 1, characterized in that: The inclinometer pipe steel protective casing (10) comprises: a cylindrical casing (6) at the bottom of the inclinometer pipe and an eccentric guide conical cap device (5).

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