Transformation structure of terminal building underneath passing underground traffic structure and construction method

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a conversion structure and a construction method of a terminal underneath pass underground traffic structure, the structure comprises a traffic structure main body, the bottom of the traffic structure main body is provided with a structure foundation, and the structure further comprises a conversion structure; the conversion structure comprises conversion pile foundations, conversion bearing platforms, conversion columns, conversion beams, on-beam columns and rigid terraces, the conversion pile foundations are arranged on the two sides of the traffic structure body in the width direction, the conversion bearing platforms are arranged on the tops of the conversion pile foundations, the conversion columns are arranged on the conversion bearing platforms, the conversion beams and the conversion columns are jointly arranged to form a frame, and the rigid terraces are arranged on the conversion columns. The on-beam column is arranged on the transfer beam, the rigid terrace is arranged on the on-beam column, and the method mainly comprises the steps of traffic structure body construction, transfer structure construction and settlement and displacement monitoring. Compared with the prior art, the load of the upper structure does not directly act on the underground traffic structure main body, the safety of the underground traffic structure main body is improved, and the service life of the underground traffic structure main body is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a conversion structure and a construction method for a terminal building passing under an underground traffic structure. Background Art

[0002] In the existing technology, there are often some problems with the structure and construction method of the high-speed rail (subway) under the airport terminal. On the one hand, since part of the transfer structure load acts on the main body of the underground transportation structure, the stability of the high-speed rail (subway) under the airport terminal is affected during the construction process, increasing the safety risk. On the other hand, the existing construction method may be inefficient and take a long time to complete, affecting the normal operation of the airport and the high-speed rail (subway). At the same time, the existing transfer structure may have deficiencies in waterproofing, earthquake resistance and other performance, making it difficult to meet the requirements of long-term use.

[0003] Therefore, if a transfer structure and construction method is adopted for the airport terminal to pass under the high-speed rail (subway), the transfer structure includes: transfer structure pile foundation, transfer structure cap, concrete transfer column, and transfer beam. The upper structure load is transferred to the surrounding of the high-speed rail (subway), not directly acting on the subway station structure, avoiding the mutual influence between the original structure and the existing structure. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention develops a conversion structure and construction method for an underground traffic structure under a terminal building, which can prevent the load of the upper structure from directly acting on the main body of the underground traffic structure, thereby improving the safety and service life of the main body of the underground traffic structure.

[0005] The technical solution to the technical problem of the present invention is: a conversion structure of an underground transportation structure under a terminal building, comprising a transportation structure main body, a structural foundation is arranged at the bottom of the transportation structure main body, and also comprises a conversion structure, the conversion structure comprises a conversion pile foundation, a conversion pedestal, a conversion column, a conversion beam, a column on the beam and a rigid floor, the conversion pile foundation is arranged on both sides of the width direction of the transportation structure main body, the conversion pedestal is arranged on the top of the conversion pile foundation, the conversion column is arranged on the conversion pedestal, the conversion beam and the conversion column are jointly arranged to form a frame, the column on the beam is arranged on the conversion beam, and the rigid floor is arranged on the column on the beam.

[0006] Preferably, sleeve valve tubes are arranged in an array on the outside of both sides in the width direction of the main body of the traffic structure, and the sleeve valve tubes are arranged at intervals of less than 0.8 meters.

[0007] Preferably, seismic isolation trenches are provided on the outside of both sides in the width direction of the main body of the traffic structure, and the seismic isolation trenches are filled with foam concrete or rubber particles.

[0008] Preferably, the bottom elevation of the seismic isolation trench should be at least 2 meters lower than the bottom elevation of the structural foundation.

[0009] A method for constructing a conversion structure for a terminal building passing under an underground traffic structure, using a conversion structure for a terminal building passing under an underground traffic structure, comprises the following steps: Step 1: Construct the main structure of the traffic structure, dig the tunnel, and build the foundation frame; Step 2: Construction of the conversion pile foundation. The pile foundation is constructed at the predetermined location by drilling and pouring concrete. After the conversion pile foundation construction is completed, the conversion pile foundation is pre-stressed to reduce the conversion pile foundation settlement caused by the increase in load after the conversion structure is successively constructed and the superstructure is constructed; Step 3: Construction of the conversion cap, setting up formwork on the conversion pile foundation and casting the conversion cap; Step 4: Construction of the transfer column: supporting the formwork on the transfer cap and casting the transfer column; Step 5: Transfer beam construction: set up formwork between transfer columns and cast transfer beam; Step 6: Construction of beam columns: set up formwork on the transfer beam and cast the beam columns; Step 7: Construction of rigid floor, pouring rigid floor on the beam column as the ground foundation of the upper structure; Step 8: Superstructure construction.

[0010] In the step 1, after the main body of the traffic structure is constructed, sleeve valve pipes are pre-buried on both sides of the width direction thereof, and the spacing between the sleeve valve pipes is less than 0.8 meters.

[0011] Before the conversion pile foundation construction in step 2, the seismic isolation trench is constructed. First, the seismic isolation trench is excavated on both sides of the width direction of the main body of the traffic structure. The bottom elevation of the seismic isolation trench should be at least 2 meters lower than the bottom elevation of the structural foundation. Then, the seismic isolation trench is filled with foam concrete or rubber particles.

[0012] In the step 2, the conversion pile foundation construction adopts the casing construction method, which firstly performs drilling construction, then inserts the casing, cleans the hole, places the steel cage, pours the concrete, and pulls out the casing after the concrete curing is completed.

[0013] The construction of the conversion foundation in step 3 should follow the principle of symmetrical loading to prevent excessive pressure on one side, which would lead to excessive displacement on one side and affect the main body of the traffic structure.

[0014] After the construction of the transfer pedestal begins until the construction of the superstructure is completed, the settlement and displacement of the transfer structure shall be monitored in real time. If the displacement or settlement exceeds the safe range, quick-setting materials shall be filled in the pre-buried sleeve valve pipe to protect the main body of the traffic structure.

[0015] The effects provided in the content of the invention are only the effects of the embodiments, rather than all the effects of the invention. The above technical solution has the following advantages or beneficial effects: 1. The conversion structure of the present invention converts the load of the upper structure to the surrounding of the main body of the underground traffic structure. The load does not directly act on the main body of the underground traffic structure, thus avoiding the influence of the load of the upper structure on the main body of the underground traffic structure; 2. By pre-embedding sleeve valve pipes on both sides of the main width direction of the traffic structure, combined with the displacement and settlement monitoring data of the conversion structure, emergency measures can be taken when the displacement and settlement exceed the safety standard, and quick-setting slurry such as quick-setting cement can be poured into the sleeve valve pipe to improve the strength of the main traffic structure and ensure its structural stability; 3. By setting up seismic isolation trenches, the impact of a large amount of vibration generated during pile foundation construction on the main body of the traffic structure can be reduced; 4. By adopting the casing construction method to carry out the conversion pile foundation construction, the impact of vibration during the pile foundation construction on the main body of the traffic structure can be further reduced; 5. Pre-stressing the conversion pile foundation after its construction is completed can avoid the increase in load caused by the subsequent conversion structure construction and superstructure construction, which may cause settlement and displacement of the conversion pile foundation. It can further avoid excessive settlement and displacement of the conversion structure, which may affect the main body of the traffic structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention; Figure 2 It is the overall structural diagram of the present invention; Figure 3 It is the right side view of the present invention.

[0017] Among them: 1. Main body of traffic structure; 101. Structural foundation; 2. Conversion pile foundation; 3. Conversion pedestal; 4. Conversion column; 5. Conversion beam; 6. Column on beam; 7. Rigid floor; 8. Seismic isolation ditch; 9. Sleeve valve pipe. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0019] Example 1 See also Figures 1 to 3, A conversion structure for an underpass underground traffic structure under a terminal building, including a traffic structure main body 1. A structural foundation 101 is provided at the bottom of the traffic structure main body 1. It also includes a conversion structure, which includes conversion pile foundations 2, conversion bearing platforms 3, conversion columns 4, conversion beams 5, columns on beams 6, and rigid floors 7. The conversion pile foundations 2 are arranged on both sides in the width direction of the traffic structure main body 1. The conversion bearing platforms 3 are arranged on the tops of the conversion pile foundations 2. The conversion columns 4 are arranged on the conversion bearing platforms 3. The conversion beams 5 and the conversion columns 4 are jointly arranged to form a framework. The columns on beams 6 are arranged on the conversion beams 5. The rigid floors 7 are arranged on the columns on beams 6.

[0020] Sleeve valve pipes 9 are arranged in an array on both outer sides in the width direction of the traffic structure main body 1, and the spacing between the sleeve valve pipes 9 is less than 0.8 meters.

[0021] Seismic isolation trenches 8 are arranged on both outer sides in the width direction of the traffic structure main body 1, and the seismic isolation trenches 8 are filled with foam concrete or rubber particles.

[0022] The bottom elevation of the seismic isolation trench 8 should be not less than 2 meters lower than the bottom elevation of the structural foundation 101.

[0023] A construction method for a conversion structure of an underpass underground traffic structure under a terminal building, using a conversion structure of an underpass underground traffic structure under a terminal building, includes the following steps: Step 1: Construct the traffic structure main body 1, conduct tunnel excavation, and establish a foundation framework; Step 2: Construct the conversion pile foundations 2. Use the methods of drilling and pouring concrete to construct pile foundations at the predetermined positions. After the construction of the conversion pile foundations 2 is completed, preload the conversion pile foundations 2 to reduce the settlement of the conversion pile foundations 2 caused by the successive construction of the conversion structure and the increase in load after the construction of the upper structure; Step 3: Construct the conversion bearing platforms 3. Set up formwork on the conversion pile foundations 2 and pour the conversion bearing platforms 3; Step 4: Construct the conversion columns 4. Set up formwork on the conversion bearing platforms 3 and pour the conversion columns 4; Step 5: Construct the conversion beams 5. Set up formwork between the conversion columns 4 and pour the conversion beams 5; Step 6: Construct the columns on beams 6. Set up formwork on the conversion beams 5 and pour the columns on beams 6; Step 7: Construct the rigid floors 7. Pour the rigid floors 7 on the columns on beams 6 as the ground foundation of the upper structure; Step 8: Construct the upper structure.

[0024] In Step 1, after the construction of the traffic structure main body 1 is completed, sleeve valve pipes 9 are pre-buried at intervals on both sides in its width direction, and the spacing between the sleeve valve pipes 9 is less than 0.8 meters.

[0025] Before the construction of the conversion pile foundation 2 in step 2, the seismic isolation trench 8 is constructed first. First, the seismic isolation trench 8 is excavated on both sides of the width direction of the traffic structure body 1. The bottom elevation of the seismic isolation trench 8 should be lower than the bottom elevation of the structural foundation 101 by at least 2 meters. Then, the seismic isolation trench 8 is filled with foam concrete or rubber particles.

[0026] In the step 2, the conversion pile foundation 2 is constructed by the casing construction method, which firstly involves drilling, then inserting the casing, cleaning the hole, placing the steel cage, pouring concrete, and pulling out the casing after the concrete curing is completed.

[0027] The construction of the conversion platform 3 in step 3 should follow the principle of symmetrical loading to prevent excessive pressure on one side from causing excessive displacement on one side and affecting the main body 1 of the traffic structure.

[0028] After the construction of the conversion pedestal 3 begins until the construction of the superstructure is completed, the settlement and displacement of the conversion structure are monitored in real time. If the displacement or settlement exceeds the safe range, quick-setting materials must be filled in the pre-buried sleeve valve pipe 9 to protect the main body 1 of the traffic structure.

[0029] principle The core function of the conversion structure of the present invention is to transfer the upper structure load to the surrounding area of ​​the underground traffic structure main body 1. By setting the conversion pile foundation 2 on both sides of the traffic structure main body 1 in the width direction, the load transmitted from the upper structure is transmitted to the conversion pile foundation 2 layer by layer through the conversion beam 5 and the conversion column 4, and finally the conversion pile foundation 2 disperses the load to the deep foundation. In this way, the load will not directly act on the underground traffic structure main body 1, fundamentally avoiding the adverse effects of the upper structure load on the main structure, ensuring that the underground traffic structure main body 1 can continue to operate safely under a stable stress environment.

[0030] Sleeve valve pipes 9 are pre-buried on both sides of the traffic structure main body 1 in the width direction, which is an important protective measure to ensure the safety of the structure. The sleeve valve pipes 9 are arranged in a standard array with an interval of less than 0.8 meters. In conjunction with the real-time monitoring data of the displacement and settlement of the conversion structure, once the displacement or settlement of the conversion structure is monitored to exceed the safety standard, a fast-setting slurry such as quick-setting cement is poured into the sleeve valve pipes 9. These slurries diffuse in the soil and solidify quickly, which enhances the strength and stability of the soil, thereby improving the overall strength of the main traffic structure and effectively ensuring its structural stability.

[0031] The provision of a seismic isolation ditch 8 can reduce the impact of construction vibrations. The seismic isolation ditch 8 is located on the outside of both sides of the traffic structure main body 1 in the width direction. The elevation of the bottom of the ditch is at least 2 meters lower than the bottom elevation of the structural foundation 101, and is filled with foam concrete or rubber particles. During the pile foundation construction process, a large amount of vibrations will be generated. If these vibrations are directly transmitted to the traffic structure main body 1, they may cause damage to its structure. The filling material in the seismic isolation ditch 8 has good buffering and seismic isolation properties, which can effectively absorb and block vibration energy, greatly reducing the impact of pile foundation construction vibrations on the traffic structure main body 1 and protecting the integrity of the main structure.

[0032] Principle of shock absorption by casing construction method: The casing construction method is used for the conversion pile foundation 2 construction, which further reduces the impact of construction vibration on the main body of the traffic structure 1. During construction, drilling is first performed, and then casing is driven in. The casing can stabilize the borehole wall to prevent the lateral force generated by the collapse of the hole and the change of the soil from affecting the external load of the main body of the traffic structure 1. Then the hole is cleaned, the steel cage is placed and the concrete is poured. After the concrete curing is completed, the casing is pulled out. In the whole process, the casing plays a role in buffering and isolating vibrations, so that the vibrations during the pile foundation construction are effectively weakened, avoiding interference with the main body of the traffic structure 1 and ensuring the safety of the main structure.

[0033] Preloading the conversion pile foundation 2 after its construction is completed is of great significance for ensuring the stability of the structure. The subsequent construction of the conversion structure and the upper structure will cause the load to increase continuously. If the conversion pile foundation 2 is not preloaded, it is likely to cause settlement and displacement due to the inability to withstand the increase in load, which will lead to excessive settlement and displacement of the conversion structure, and have an adverse effect on the main body of the traffic structure 1. Through preloading, some of the settlement and displacement caused by the subsequent increase in load can be eliminated in advance, so that the conversion pile foundation 2 can remain stable during the subsequent construction process, providing a strong guarantee for the safe operation of the entire conversion structure and the main body of the traffic structure 1.

[0034] The conversion pile foundation 2 is arranged on both sides of the traffic structure body 1 in the width direction, serving as the basic support part of the entire conversion structure. Its function is to transfer the huge load from the upper structure to the deep stable foundation soil layer through the pile body to ensure the stability of the entire structure. The construction method of drilling and pouring concrete can make the pile foundation closely combined with the surrounding soil and enhance the bearing capacity.

[0035] The transfer cap 3 is located on the top of the transfer pile foundation 2. It evenly distributes the concentrated load from the transfer pile foundation 2 to each transfer column 4 to avoid excessive local stress. It is formed by supporting the formwork on the transfer pile foundation 2 and pouring concrete. During construction, the symmetrical loading principle is followed to prevent structural displacement due to excessive unilateral pressure, which affects the safety of the main traffic structure 1 below.

[0036] The conversion column 4 is arranged on the conversion cap 3 and is a vertical bearing structure. It mainly bears the load from the conversion beam 5 and the upper structure, and transmits it to the conversion cap 3 and the conversion pile foundation 2. The conversion column 4 and the conversion beam 5 together form a frame structure, which enhances the spatial stability and bearing capacity of the entire conversion structure.

[0037] The transfer beam 5 and the transfer column 4 together form a frame structure, which transfers the load from the beam column 6 to the transfer column 4. Through reasonable structural arrangement, the load of the upper structure is effectively distributed, making the force of the entire transfer structure more uniform and reasonable.

[0038] The beam column 6 is arranged on the transfer beam 5, and is mainly used to support the rigid floor 7 and part of the load of the upper structure. It plays a role in further transferring and dispersing the load, ensuring that the load of the upper structure can be smoothly transferred to the foundation through the transfer structure.

[0039] The rigid floor 7 is cast on the beam column 6 as the ground foundation of the superstructure. It not only provides a flat and stable support surface for the superstructure, but also evenly distributes the load from the superstructure to the beam column 6 and the entire conversion structure system, thereby enhancing the integrity and stability of the structure.

[0040] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A transfer structure for a terminal building passing through an underground traffic structure, comprising a traffic structure main body (1), wherein a structural foundation (101) is arranged at the bottom of the traffic structure main body (1), characterized in that: The structure also includes a conversion structure, which includes a conversion pile foundation (2), a conversion pedestal (3), a conversion column (4), a conversion beam (5), a beam-upper column (6) and a rigid floor (7), wherein the conversion pile foundation (2) is arranged on both sides of the traffic structure body (1) in the width direction, the conversion pedestal (3) is arranged on the top of the conversion pile foundation (2), the conversion column (4) is arranged on the conversion pedestal (3), the conversion beam (5) and the conversion column (4) are arranged together to form a frame, the beam-upper column (6) is arranged on the conversion beam (5), and the rigid floor (7) is arranged on the beam-upper column (6).

2. The transfer structure of a terminal building passing under an underground traffic structure according to claim 1, characterized in that: Sleeve valve tubes (9) are arranged in an array on the outside of both sides in the width direction of the traffic structure body (1), and the sleeve valve tubes (9) are arranged at intervals of less than 0.8 meters.

3. The conversion structure of a terminal building passing under an underground traffic structure according to claim 2, characterized in that: Seismic isolation trenches (8) are provided on the outside of both sides in the width direction of the traffic structure body (1), and the seismic isolation trenches (8) are filled with foam concrete or rubber particles.

4. The transfer structure of a terminal building passing under an underground traffic structure according to claim 3, characterized in that: The bottom elevation of the seismic isolation trench (8) should be no less than 2 meters lower than the bottom elevation of the structural foundation (101).

5. A method for constructing a transfer structure under a terminal building passing through an underground traffic structure, characterized in that: The construction of a conversion structure for a terminal building passing under an underground traffic structure according to claim 4 comprises the following steps: Step 1: Construction of the main structure of the traffic structure (1), tunnel excavation and establishment of the foundation framework; Step 2: Construction of the conversion pile foundation (2), using drilling and pouring concrete to construct the pile foundation at the predetermined position, and after the construction of the conversion pile foundation (2) is completed, the conversion pile foundation (2) is pre-stressed to reduce the settlement of the conversion pile foundation (2) caused by the increase in load after the construction of the conversion structure and the upper structure; Step 3: Construction of the conversion cap (3), setting up formwork on the conversion pile foundation (2) and casting the conversion cap (3); Step 4: Construction of the transfer column (4): supporting the formwork on the transfer base (3) and casting the transfer column (4); Step 5: Construction of the transfer beam (5), setting up formwork between the transfer columns (4) and casting the transfer beam (5); Step 6: Construction of the beam column (6), supporting the formwork on the transfer beam (5) and casting the beam column (6); Step 7: Construction of rigid floor (7), pouring rigid floor (7) on the beam column (6) as the ground foundation of the upper structure; Step 8: Superstructure construction.

6. The method for constructing a transfer structure for a terminal building passing under an underground traffic structure according to claim 5, characterized in that: In the step 1, after the construction of the traffic structure main body (1) is completed, sleeve valve pipes (9) are pre-buried on both sides of the traffic structure in the width direction, and the spacing between the sleeve valve pipes (9) is less than 0.8 meters.

7. The method for constructing a transfer structure of a terminal building passing under an underground traffic structure according to claim 5, characterized in that: Before the construction of the conversion pile foundation (2) in step 2, the seismic isolation trench (8) is constructed. First, the seismic isolation trench (8) is excavated on both sides of the width direction of the traffic structure body (1). The bottom elevation of the seismic isolation trench (8) should be lower than the bottom elevation of the structural foundation (101) by not less than 2 meters. Then, the seismic isolation trench (8) is filled with foam concrete or rubber particles.

8. The method for constructing a transfer structure for a terminal building passing under an underground traffic structure according to claim 5, characterized in that: The conversion pile foundation (2) in step 2 is constructed by a casing construction method, which first involves drilling, followed by inserting casing, cleaning the hole, placing a steel cage, pouring concrete, and pulling out the casing after the concrete curing is completed.

9. The method for constructing a transfer structure for a terminal building passing under an underground traffic structure according to claim 5, characterized in that: The construction of the conversion pedestal (3) in step 3 should follow the principle of symmetrical loading to prevent excessive pressure on one side from causing excessive displacement on one side and affecting the main body of the traffic structure (1).

10. The method for constructing a transfer structure of a terminal building passing under an underground traffic structure according to claim 5, characterized in that: After the construction of the transfer pedestal (3) begins until the construction of the superstructure is completed, the settlement and displacement of the transfer structure are monitored in real time. If the displacement or settlement exceeds the safe range, quick-setting materials must be filled in the pre-buried sleeve valve pipe (9) to protect the main body of the traffic structure (1).

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