Reinforced concrete precast pile lock pin type connecting device convenient for prefabricated construction

Abstract

The lock pin type connecting device for the reinforced concrete precast pile is convenient for assembly construction. Which comprises a lower base (1), a socket column (2), a socket hole (3), an upper base (4), a threaded anchoring rib (5), a threaded hole (6), a bolt hole (7), a bolt rod (8) and a segmental precast pile (9), and is characterized in that: (1) the disturbance of the traditional cast-in-situ bored pile foundation on the environment and the stratum is overcome, and the ecological environment of a special region is favorably protected; and (2) the pile foundation sections and the connecting devices thereof are all prefabricated in a factory in a standardized manner, so that the construction efficiency of the pile foundation is effectively improved, and the flow of field assembly construction is simplified. The connecting device is simple in structure and convenient to operate, the number of the high-strength connecting pieces and the number of the reserved inserting holes can be adjusted according to actual engineering requirements, and construction flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated assembled pile foundation connection methods, and specifically refers to a reinforced concrete prefabricated pile locking pin connection device which is convenient for assembly construction. Background Art

[0002] With the continuous development of my country's infrastructure, the development of bridges tends to be larger in span, faster in construction, and green in construction capacity, which places higher requirements on bridge construction. As a key infrastructure that bears the self-weight and traffic load of the bridge and transmits it to the foundation, pile foundations pay more attention to construction requirements. The existing concrete pile foundations are mainly cast-in-place piles and precast piles. Cast-in-place piles have a long construction period, low efficiency, and difficult to ensure construction quality due to factors such as construction conditions, steel cage binding, and concrete curing cycle. In particular, the thermal disturbance problem of cast-in-place concrete on frozen soil sites in high-cold environments is more serious; and precast piles consider the prefabrication length, cracks in the pile body during transportation, etc., which will lead to quality problems of pile foundations. Therefore, in order to reduce the thermal disturbance problem of cast-in-place concrete and the transportation problem of precast piles, combined with prefabricated construction technology, precast piles are partially prefabricated in the factory, and the construction site is constructed by segmented splicing, in order to achieve green construction and ensure construction efficiency.

[0003] As a new type of green construction method, prefabricated construction has great development advantages in engineering construction. Prefabricated pile foundation is a new type of pile foundation. It is completed by prefabricating a certain length of pile foundation segments in the factory in advance, transporting them to the construction site, and splicing and assembling them through the connection device. Therefore, for prefabricated pile foundations, the connection method is required to be simple and fast, easy to construct, and the connection has sufficient strength to bear the load. However, the application of prefabricated structures in bridge engineering is mainly superstructures and bridge piers, and prefabricated construction is rarely used in underground structures. The research on the use of prefabricated pile foundations is still in its early stages. The technology for prefabricated construction of underground structures is not mature, and the connection method is relatively simple. Therefore, a reinforced concrete prefabricated pile lock pin connection device that is convenient for prefabricated construction is invented, which reduces the prefabricated length of the prefabricated pile foundation, reduces the generation of cracks, and avoids the thermal disturbance effect of cast-in-place concrete. It is of great significance to the construction of pile foundations in plateau frozen areas; the development and realization of prefabricated technology is of great significance to the development of prefabricated engineering structures in my country. Summary of the invention

[0004] In order to improve the construction efficiency of concrete pile foundation, reduce the disturbance of construction to the environment, ensure the construction quality and construction efficiency, the utility model aims to provide a reinforced concrete prefabricated pile lock pin type connection device that is convenient for assembly construction. The connection device is prefabricated in the factory, and then prefabricated in the factory with the segment pile foundation, and transported to the site by transportation equipment for assembly of the segment pile foundation. The connection device is prefabricated as a whole with the segment pile foundation in the project, and can be stressed as a whole with the bridge pile foundation, thereby improving the integrity of the bridge pile foundation.

[0005] The technical solution adopted by the utility model is: a reinforced concrete precast pile lock pin type connection device which is convenient for assembly construction. It comprises nine parts: a lower base (1), a socket column (2), a socket hole (3), an upper base (4), a threaded anchor bar (5), a threaded hole (6), a pin hole (7), a pin rod (8), and a segmented precast pile (9). The connecting device is characterized in that it comprises an upper part and a lower part, wherein the lower part comprises a lower base (1), a socket column (2), a threaded anchor bar (5) and a threaded hole (6), wherein one end of the threaded anchor bar (5) is threaded and the other end is not threaded, and the thread length of the threaded end is consistent with the thickness of the upper base (4) and the lower base (1), and after the threaded end of the threaded anchor bar (5) is threadedly anchored through the threaded hole (6), the entire lower part becomes a whole and is subjected to force together, and the upper part comprises an upper base (4), a socket hole (3), a threaded anchor bar (5) and a threaded hole (6), and also becomes a complete component after being threadedly anchored through the threaded anchor bar (5), and the two parts are locked by a latch rod (8) to become an integral component. The upper and lower parts of the device are respectively embedded in the two ends of the segment precast pile (9) through threaded anchor bars (5), and the number of threaded anchor bars (5) is consistent with the number of longitudinal bars in the segment precast pile (9). When the segment precast pile is precast in the factory, the device is embedded in the two ends of the segment precast pile (9) through threaded anchor bars (5), so that the device and the segment precast pile (9) bear the load as a whole. The segment precast pile (9) is connected step by step through the connecting devices at both ends to bear the force together. The size of the device is kept consistent with the cross-sectional size of the segment precast pile (9), ensuring the transmission performance of the internal force of the pile body of the segment precast pile (9) between the segments. The connecting device has accurate positioning openings, so that the pile segments are better fitted to achieve the best working state, ensuring that its design function is fully utilized, and ensuring the bearing capacity and structural stability of the pile foundation.

[0006] The advantages and beneficial effects of the present invention are: 1. The prefabricated assembled pile foundation adopted by the present invention has the advantages of small disturbance to the stratum and small pollution to the environment, which is beneficial to protecting the ecological environment of special areas. Compared with traditional bored piles, the construction of prefabricated assembled pile foundation improves the reliability and efficiency of construction. 2. The prefabricated pile segments and connecting devices of the present invention are prefabricated in the factory and can be assembled after being transported to the construction site, and the connection method is simple and easy to operate, which effectively improves the construction efficiency. 3. The reinforcement device of the present invention can reduce the impact on the environment, reduce energy consumption, and has the advantages of environmental protection and energy saving. 4. The connecting device adopted by the present invention has a simple structure and is easy to operate. The number of high-strength connectors and reserved sockets can be adjusted according to the needs of the actual project, which increases the flexibility of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The present invention is a structural diagram of a locking pin type connection device for reinforced concrete precast piles which is convenient for assembly construction. Figure 2 The present invention is a front view of a locking pin type connection device for reinforced concrete precast piles which is convenient for assembly construction. Figure 3 The present invention is a top view of a locking pin type connection device for reinforced concrete precast piles which is convenient for assembly construction. Figure 4 The present invention is a schematic diagram of the pile end connection of a locking pin type connection device for precast reinforced concrete piles which is convenient for assembly construction.

[0008] Explanation of the figure numbers: 1. Lower base; 2. Socket column; 3. Socket hole; 4. Upper base; 5. Threaded anchor bar; 6. Threaded hole; 7. Pin hole; 8. Pin rod; 9. Segmental precast pile. DETAILED DESCRIPTION

[0009] The utility model is further described below in conjunction with the accompanying drawings: the overall structure diagram of the utility model and the detailed structure diagram of the connecting device are as follows Figures 1 to 4As shown. The utility model comprises nine parts, namely, a lower base (1), a socket column (2), a socket hole (3), an upper base (4), a threaded anchor bar (5), a threaded hole (6), a pin hole (7), a pin rod (8), and a segmented prefabricated pile (9). The connecting device comprises an upper and a lower part, wherein the lower part is composed of a lower base (1), a socket column (2), a threaded anchor bar (5) and a threaded hole (6). During the specific implementation process, the device performs accurate positioning and punching work in the factory to ensure that the threaded hole (6) matches the threaded anchor bar (5), the pin hole (7) matches the pin rod (8), the threaded anchor bar (5) has one end with a thread and the other end without a thread, and the thread length of the threaded end is the same as the thickness of the upper base (4) and the lower base (1). The corresponding parts are kept consistent so as to facilitate the tight anchoring of the threaded anchor bar (5) and the threaded hole (6). The number of the threaded anchor bar (5) should correspond to the number of longitudinal bars in the segmental precast pile (9). When the segmental precast pile (9) is precast in the factory, the upper and lower parts of the connecting device are pre-buried at both ends of the segmental precast pile (9) through the threaded anchor bar (5), so that after the segmental precast pile (9) is precast in the factory, the two parts of the connecting device and the segmental precast pile (9) can be ensured to work as a whole under load. The two parts of the connecting device at the end of the segmental precast pile (9) are locked and connected by a latch rod (8) between the segmental precast piles (9), so that each segmental precast pile (9) is assembled in sections, so that each segmental precast pile (9) is connected as a whole through the connecting device to bear the load together. The size of the device is kept consistent with the cross-sectional size of the segmental precast pile (9), so as to ensure the transmission performance of the internal force of the pile body of the segmental precast pile (9) between the sections. The connection device has accurate positioning openings, so that the pile segments can be better fitted to achieve the best working state. The segment precast piles (9) are connected step by step through the connection devices at both ends and are jointly stressed. The above parts perform their respective functions, coordinate with each other, and work together to form a reinforced concrete precast pile lock pin connection device that is convenient for assembly construction.

Claims

1. A reinforced concrete precast pile lock pin connection device convenient for assembly construction, comprising a lower base (1), a socket column (2), a socket hole (3), an upper base (4), a threaded anchor bar (5), a threaded hole (6), a latch hole (7), a latch rod (8), and a segmented precast pile (9), and is characterized by: The connection device comprises an upper part and a lower part, wherein the lower part comprises a lower base (1), a socket column (2), a threaded anchor bar (5) and a threaded hole (6). The device is accurately positioned and punched in a factory to ensure that the threaded hole (6) matches the threaded anchor bar (5) and the latch hole (7) matches the latch rod (8). The threaded anchor bar (5) has a thread at one end and no thread at the other end. The thread length of the threaded end is consistent with the thickness of the upper base (4) and the lower base (1) so as to facilitate the tight anchoring of the threaded anchor bar (5) and the threaded hole (6). The number of the threaded anchor bars (5) should correspond to the number of the segmental prefabricated piles (9). When the segmental prefabricated piles (9) are prefabricated in a factory, the upper and lower parts of the device are respectively embedded in the two ends of the segmental prefabricated piles (9) through the threaded anchor bars (5), so as to complete the segmental assembly of each segmental prefabricated pile (9). Each segmental prefabricated pile (9) is connected to form a complete pile foundation through the connection device.

2. According to claim 1, a locking pin type connection device for reinforced concrete precast piles that is convenient for assembly construction is characterized in that: The connection device adopts concave and convex locking pin butt connection, and the number of threaded anchor bars is consistent with the number of longitudinal bars of the segmental precast piles.

3. According to claim 1, a locking pin type connection device for reinforced concrete precast piles that is convenient for assembly construction is characterized in that: During factory prefabrication, reinforced concrete pile segments and connecting devices are prefabricated in an overall standardized manner. There is no need to install the connecting devices on site, and the splicing of the pile segments can be completed by simply locking them through locking pins.

4. According to claim 1, a locking pin type connection device for reinforced concrete precast piles that is convenient for assembly construction is characterized in that: The factory completes the positioning and drilling work. The threaded end of the threaded anchor bar is tightly anchored with the threaded holes of the upper base and the lower base. The threaded hole matches the threaded anchor bar, and the pin hole matches the pin rod.

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