Measuring pier structure for rail transit and construction method thereof

Abstract

The application belongs to the field of building construction measurement, and particularly relates to a measurement pier structure for rail transit and a construction method thereof. The measurement pier structure comprises a forced centering disc and a measurement pier connected with the forced centering disc; the measurement pier comprises a pier foundation, a center column arranged at the center of the pier foundation, a pier side wall arranged around the center column and connected with the pier foundation, a pier top plate arranged at the top of the pier side wall, and a fixed cross beam connecting the pier side wall and the center column; the center column is connected with the forced centering disc through the pier top plate. The scheme of the application has wide application range and high popularization value, and is particularly suitable for the application of construction control points under various conditions of rail transit.

Description

Technical Field

[0001] This invention belongs to the field of building construction surveying, specifically relating to a surveying pier structure for rail transit and its construction method. Background Technology

[0002] With the continuous development of urban rail transit in my country due to technological advancements, urban rail lines are mostly built in densely built-up areas, placing higher demands on the accuracy of engineering surveying, especially the engineering surveying control network. Given the diverse urban geological environments, how to construct a stable surveying control pier suitable for rail transit to solve the measurement accuracy problems faced by urban rail transit is particularly important for the surveying control network. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a measurement pier structure for rail transit and its construction method.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A measuring pier structure for rail transit includes a forced centering plate and a measuring pier connected to the forced centering plate; the measuring pier includes a pier foundation, a central column located at the center of the pier foundation, pier side walls located around the central column and connected to the pier foundation, a pier top plate located on top of the pier side walls, and fixed horizontal and vertical beams connecting the pier side walls and the central column; the central column passes through the pier top plate and is connected to the forced centering plate.

[0006] The central column comprises a PVC pipe as its outer sheath and threaded steel bars installed inside the PVC pipe.

[0007] Construction joints are arranged between the pier foundation and the surrounding hardened ground.

[0008] The outer side of the pier top plate is connected to the ground via pedestrian steps.

[0009] Guardrails are installed on the outer side of the pedestrian steps and around the top of the platform.

[0010] The pier foundation is equipped with a steel mesh.

[0011] The forced centering plate includes a stainless steel plate, a centering screw set on the stainless steel plate, a hexagonal nut set on the lower part of the stainless steel plate, and a connecting screw connected to the hexagonal nut; the connecting screw is connected to the central column.

[0012] The hexagonal nuts mentioned are three that are evenly distributed.

[0013] The present invention also includes a construction method for the aforementioned measuring pier structure for rail transit, comprising the following steps:

[0014] 1) Excavate the foundation pit, compact the base, fix the steel mesh and PVC pipes used to make the intermediate columns in the middle of the foundation pit, and pour concrete to complete the construction of the pier foundation; the PVC pipes are kept perpendicular to the foundation pit; the PVC pipes are equipped with threaded steel bars.

[0015] 2) Once the foundation strength of the pier reaches 80%, erect the pier wall panels and fix the formwork for the horizontal and vertical beams. The pier wall panels include the side wall formwork and the top slab formwork.

[0016] 3) First pour the side walls of the pier and the fixed horizontal and vertical beams, then pour the top slab;

[0017] 4) After the wall formwork is removed, the middle column is poured. The forced centering plate is placed on the top of the middle column, and the connecting bolt is immersed in the concrete. The tray connected to the centering bolt is adjusted to be level using a spirit level. After the concrete strength reaches the design strength, a stable measuring pier structure for rail transit is completed.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1) Robust and stable: The measuring pier adopts a concrete frame structure with steel reinforcement in the stress-bearing parts to ensure the stability of the overall structure; the pier foundation area is large, reducing uneven settlement of the pier; construction joints are arranged between the pier foundation and the surrounding hardened ground to avoid the impact of traffic on the pier structure.

[0020] 2) The overall internal structure of the measuring pier is designed as a hollow structure, which is simple and has good stability.

[0021] 3) Less labor and material input: The concrete structure only requires one formwork worker to construct the pier structure, eliminating the need for traditional masonry structures that require a lot of manual labor; it also saves a large amount of sand and gravel needed to fill the space.

[0022] 4) The structure is simple and easy to replicate. It can be applied to multiple working conditions in the rail transit field and is easy to promote and use. Attached Figure Description

[0023] Figure 1 This is a top view of the measuring pier structure for rail transit according to the present invention;

[0024] Figure 2 This is a cross-sectional view of the measuring pier structure used in rail transit according to the present invention;

[0025] Figure 3 This is a side view of the measuring pier structure for rail transit according to the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0027] Figure 1-3 A measuring pier structure for rail transit is shown, including a forced centering plate 1 and a measuring pier connected to the forced centering plate;

[0028] The measuring pier includes a pier foundation 5, a central column 2 located at the center of the pier foundation, pier side walls connected to the pier foundation and surrounding the central column, a pier top plate located on top of the pier side walls, and fixed horizontal and vertical beams 4 connecting the pier side walls and the central column; the central column 2 passes through the pier top plate and is connected to the forced centering plate 1; the pier top plate and the pier side plates together constitute the pier wall panel 3.

[0029] The fixed horizontal and vertical beams 4 are constructed by formwork erection and concrete pouring, with both ends connected to the intermediate column and the side wall of the pier. The fixed horizontal and vertical beams, together with the pier foundation and the top slab of the pier, serve to fix the intermediate column.

[0030] The central column 2 comprises a PVC pipe as its outer sheath and threaded steel bars installed inside the PVC pipe. The bottom of the central column 2 is embedded in the pier foundation, and the middle part is fixed to the fixed horizontal and vertical beams and the top plate of the pier.

[0031] A construction joint is arranged between the pier foundation 5 and the surrounding hardened ground.

[0032] The outer side of the pier top slab is connected to the ground via pedestrian steps 6. The pedestrian steps are mainly made of aerated concrete blocks, bonded together with cement mortar. This method saves time and materials compared to traditional bricklaying.

[0033] The pedestrian steps 6 are equipped with guardrails 7 on the outer side and around the top plate of the pier. The pedestrian steps 6 are fixed to the top plate of the pier and the outer side of the steps with self-tapping screws, which serves as a safety protection function.

[0034] The pier foundation 5 is equipped with a steel mesh.

[0035] The forced centering plate 1 includes a stainless steel plate, centering screws disposed on the stainless steel plate, hexagonal nuts disposed on the lower part of the stainless steel plate, and connecting screws connected to the hexagonal nuts; the connecting screws are connected to the central column. There are three hexagonal nuts evenly distributed throughout the plate.

[0036] A construction method for a surveying pier structure used in rail transit includes the following steps:

[0037] 1) Excavate the foundation pit, compact the base, fix the steel mesh and PVC pipes used to make the intermediate columns in the middle of the foundation pit, and pour concrete to complete the construction of the pier foundation; the PVC pipes are kept perpendicular to the foundation pit; the PVC pipes are equipped with threaded steel bars.

[0038] 2) Once the foundation strength of the pier reaches 80%, erect the pier wall panels and fix the formwork for the horizontal and vertical beams. The pier wall panels include the side wall formwork and the top slab formwork.

[0039] 3) First pour the side walls of the pier and the fixed horizontal and vertical beams, then pour the top slab;

[0040] 4) After the wall formwork is removed, the middle column is poured. The forced centering plate is placed on the top of the middle column, and the connecting bolt is immersed in the concrete. The tray connected to the centering bolt is adjusted to be level using a spirit level. After the concrete strength reaches the design strength, a stable measuring pier structure for rail transit is completed.

[0041] This invention provides a stable measurement control observation pier structure suitable for use in rail transit construction surveying. By combining a forced centering plate with the measurement pier, it greatly reduces centering errors and the problem of point instability caused by uneven settlement of control points during long-term use.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A construction method for a surveying pier structure used in rail transit, characterized in that, Includes the following steps: 1) Excavate the foundation pit, compact the base, fix the steel mesh and PVC pipe used for making the central column in the middle of the foundation pit, and pour concrete to complete the construction of the pier foundation; the PVC pipe is kept perpendicular to the foundation pit; the PVC pipe is equipped with threaded steel bars. 2) Once the foundation strength of the pier reaches 80%, erect the pier wall panels and fix the formwork for the horizontal and vertical beams. The pier wall panels include the side wall formwork and the top slab formwork. The two ends of the fixed horizontal and vertical beams are connected to the central column and the side wall of the pier. 3) First pour the side walls of the pier and the fixed horizontal and vertical beams, then pour the top slab; 4) After the wall formwork is removed, the central column is poured. The forced centering plate is placed on the top of the central column, and the connecting bolt is immersed in the concrete. The tray connected to the centering bolt is adjusted to be level using a spirit level. After the concrete strength reaches the design strength, a stable measuring pier structure for rail transit is completed.

2. The construction method according to claim 1, characterized in that, The aforementioned measuring pier structure for rail transit includes a forced centering plate and a measuring pier connected to the forced centering plate; the measuring pier includes a pier foundation, a central column located at the center of the pier foundation, pier side walls located around the central column and connected to the pier foundation, a pier top plate located on top of the pier side walls, and fixed horizontal and vertical beams connecting the pier side walls and the central column; the central column passes through the pier top plate and connects to the forced centering plate.

3. The construction method according to claim 2, characterized in that, The central column comprises a PVC pipe as its outer sheath and threaded steel bars installed inside the PVC pipe.

4. The construction method according to claim 2, characterized in that, Construction joints are arranged between the pier foundation and the surrounding hardened ground.

5. The construction method according to claim 2, characterized in that, The outer side of the pier top plate is connected to the ground via pedestrian steps.

6. The construction method according to claim 5, characterized in that, Guardrails are installed on the outer side of the pedestrian steps and around the top of the platform.

7. The construction method according to claim 1, characterized in that, The pier foundation is equipped with a steel mesh.

8. The construction method according to claim 1, characterized in that, The forced centering plate includes a stainless steel plate, a centering screw set on the stainless steel plate, a hexagonal nut set on the lower part of the stainless steel plate, and a connecting screw connected to the hexagonal nut; the connecting screw is connected to the central column.

9. The construction method according to claim 8, characterized in that, The hexagonal nuts mentioned are three that are evenly distributed.

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