Cover plate reinforcing structure for current well protection

Abstract

The utility model relates to a cover plate reinforcing structure for protecting a current well, which comprises a cover plate structure arranged at the top of the current well, a cast-in-situ bored pile or a pier foundation and an annular frame crown beam, and the cast-in-situ bored pile or the pier foundation is arranged on the periphery of the current well in a surrounding mode. The annular frame crown beam is arranged between the cover plate structure and the cast-in-situ bored pile or the pier foundation, and buffering filler is arranged between the cover plate structure and the upper end of the current well. According to the cover plate reinforcing structure for protecting the current well, the cover plate structure, the cast-in-situ bored pile or the pier foundation and the ring frame crown beam are reliably connected, so that the influence on the surrounding environment can be effectively reduced, the construction difficulty is reduced, the engineering investment is saved, and meanwhile, the safety of the current well structure is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal facilities, in particular to a cover plate reinforcement structure used for existing well protection. Background Art

[0002] Urban renewal and reconstruction is an important trend in current urban development. During the process of urban renewal and reconstruction, when the ground use environment above the existing drainage well changes, the external load on the existing well increases, and the existing well bearing capacity is difficult to meet, so the existing well needs to be reconstructed. A common reconstruction method is to demolish and rebuild the existing well. This solution requires construction diversion, foundation pit excavation, well demolition and reconstruction, which occupies a large area, has a wide impact on the construction, a large amount of coordination work, a high project cost, and a great impact on the surrounding environment. In order to minimize the impact on the surrounding environment, reduce the difficulty of construction, save project investment, ensure the safety of the existing well structure, and make full use of the advantages of various structural components, it is necessary to design a simpler and more practical protection of the existing well cover reinforcement structure. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a cover plate reinforcement structure for existing well protection in view of the deficiencies of the above-mentioned prior art.

[0004] The utility model provides a technical solution to the above-mentioned technical problems as follows: a cover plate reinforcement structure for protecting an existing well, comprising a cover plate structure arranged on the top of the existing well, bored cast-in-place piles or pier foundations and a ring frame crown beam, the bored cast-in-place piles or pier foundations being arranged around the outer periphery of the existing well, the ring frame crown beam being arranged between the cover plate structure and the bored cast-in-place piles or pier foundations, and a buffer filler being arranged between the cover plate structure and the upper end of the existing well.

[0005] The beneficial effects of the utility model are as follows: the cover plate reinforcement structure of the utility model for existing well protection can effectively reduce the impact on the surrounding environment, reduce the difficulty of construction, save engineering investment, and ensure the safety of the existing well structure by reliably connecting the cover plate structure, bored cast-in-place piles or pier foundations and ring frame crown beams.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows:

[0007] Further: the cover plate structure is arranged between the designed road surface and the existing well to isolate the load above the cover plate structure.

[0008] The beneficial effect of the above further scheme is that by arranging the cover plate structure between the designed road surface and the existing well, the soil above the cover plate structure can be isolated, the existing well can be protected, and the upper load can be transferred to the ring frame crown beam.

[0009] Further: the cover plate structure is a whole reinforced concrete plate, and the cover plate structure is penetrated by openings.

[0010] The beneficial effect of the above further solution is that the reinforced concrete whole slab can be used as the main load-bearing member of the protection structure to bear the vertical load.

[0011] Further: A maintenance shaft connected to the existing shaft is arranged on the cover plate structure, and the maintenance shaft is located between the cover plate structure and the designed road surface.

[0012] The beneficial effect of the above further scheme is: by setting up the inspection shaft, it can be used for daily inspection and maintenance, and by setting the inspection shaft between the cover structure and the designed road surface, it can avoid affecting the traffic on the road surface and protect the existing well.

[0013] Further: the inspection shaft is formed by cast-in-place plain concrete or a prefabricated shaft.

[0014] The beneficial effect of the above further scheme is that the plain concrete cast-in-place or prefabricated shaft can provide better structural strength, avoid damage when subjected to stress, and form a stable maintenance passage between the existing shaft.

[0015] Further: the ring frame crown beam adopts a reinforced concrete structure and is connected to the bored cast-in-place pile or pier foundation as a whole.

[0016] The beneficial effect of the above further scheme is: by adopting a reinforced concrete structure for the ring frame crown beam, its structural strength can be guaranteed, and the bored cast-in-place piles or pier foundations arranged at intervals and dispersedly are connected into a whole, which can bear part of the water and soil pressure or additional horizontal load, and enhance the overall stiffness and bearing capacity of the structure; at the same time, the ring frame crown beam serves as a support for the cover plate structure, which can fix and constrain the cover plate structure, and effectively connect the cover plate structure with the bored cast-in-place piles or pier foundations.

[0017] Further: the bored cast-in-place piles or pier foundations are evenly arranged around the existing well and are set close to the existing well.

[0018] The beneficial effect of the above further scheme is that by evenly arranging the bored cast-in-place piles or pier foundations around the existing well and setting them close to the existing well, they can serve as the basis of the cover plate reinforcement structure and transfer the vertical load to the foundation soil bearing layer.

[0019] Further: the buffer filler is made of flexible material.

[0020] The beneficial effect of the above further solution is that a buffer zone can be formed by adopting a flexible material, thereby preventing the deformation of the cover plate structure from directly affecting the existing well, which is beneficial to protecting the existing well. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic cross-sectional structure diagram of a cover plate reinforcement structure for existing well protection according to an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the planar structure of a cover plate reinforcement structure for existing well protection according to an embodiment of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. bored pile or pier foundation, 2. ring frame crown beam, 3. cover plate structure, 4. buffer filler, 5. maintenance shaft, 6. existing well;

[0025] 001. Designed road surface, 002. Cover plate reinforcement structure, 003. Existing soil around the well. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] like Figure 1 and Figure 2 As shown, when the ground environment above the existing well 6 changes, the bearing capacity of the existing well structure is difficult to meet the requirements, and the existing well needs to be protected. The utility model provides a cover plate reinforcement structure for protecting the existing well, and the cover plate reinforcement structure 002 includes a cover plate structure 3 arranged on the top of the existing well 6, bored cast-in-place piles or pier foundations 1 and a ring frame crown beam 2, the bored cast-in-place piles or pier foundations 1 are arranged around the periphery of the existing well 6, the ring frame crown beam 2 is arranged between the cover plate structure 3 and the bored cast-in-place piles or pier foundation 1, and a buffer filler 4 is arranged between the cover plate structure 3 and the upper end of the existing well 6.

[0028] The cover plate reinforcement structure for existing well protection of the utility model can effectively reduce the impact on the surrounding environment, lower the construction difficulty, save project investment, and ensure the safety of the existing well structure by reliably connecting the cover plate structure 3, bored cast-in-place piles or pier foundation 1 and the ring frame crown beam 2.

[0029] In one or more embodiments of the present invention, the cover plate structure 3 is arranged between the designed road surface 001 and the existing well 6, and bears the water and soil pressure above and the additional vertical load to isolate the load above the cover plate structure 3, and transfer the load to the ring frame crown beam 2, and then transfer it to the bored pile or pier foundation 1. By arranging the cover plate structure 3 between the designed road surface 001 and the existing well 6, the soil above the cover plate structure 3 can be isolated, the existing well 6 can be protected, and the upper load can be transferred to the ring frame crown beam 2.

[0030] In one or more embodiments of the present invention, the cover plate structure 3 is a reinforced concrete whole plate, and the cover plate structure 3 is provided with openings. The reinforced concrete whole plate can be used as the main load-bearing member of the protection structure to bear the vertical load. Here, the thickness of the cover plate structure 3 is generally not less than 1 / 8 of its span, and the cover plate structure 3 can be considered as simply supported on all sides when calculating.

[0031] Optionally, in one or more embodiments of the utility model, a maintenance shaft 5 connected to the existing shaft 6 is provided on the cover plate structure 3, and the maintenance shaft 5 is located between the cover plate structure 3 and the designed road surface 001. The maintenance shaft 5 can be used for daily maintenance, which is convenient for maintenance. By arranging the maintenance shaft 5 between the cover plate structure 3 and the designed road surface 001, the traffic on the road surface can be avoided, and the existing shaft 6 can be protected.

[0032] Specifically, in one or more embodiments of the present invention, the inspection shaft 5 is cast in situ or prefabricated with plain concrete. The cast in situ or prefabricated shaft can provide better structural strength, avoid damage when subjected to force, and form a stable inspection channel with the existing shaft 6.

[0033] Here, the size of the inspection shaft 5 is generally 700-800mm, and the wall thickness of the shaft is generally 250mm; when the inspection shaft 5 is located under the roadway, a cover plate must be installed on the inspection shaft 5. For details of the cover plate, please refer to the "Detailed Construction Practices for Municipal Public Engineering Projects" 17ZZ04 of the Central and South China Engineering Construction Standard Design.

[0034] In one or more embodiments of the utility model, the ring frame crown beam 2 adopts a reinforced concrete structure and is connected to the bored pile or pier foundation 1 as a whole. By adopting a reinforced concrete structure for the ring frame crown beam 2, its structural strength can be ensured, and the bored piles or pier foundations 1 arranged at intervals and dispersedly are connected as a whole, which can bear part of the water and soil pressure or additional horizontal loads, and enhance the overall rigidity and bearing capacity of the structure; at the same time, the ring frame crown beam 2 serves as a support for the cover plate structure 3, which can fix and constrain the cover plate structure 3, and effectively connect the cover plate structure 3 with the bored pile or pier foundation 1. Here, the width of the ring frame crown beam 2 is generally 100mm wider than the two sides of the pile or pier foundation 1, and the height is generally 800-1000mm.

[0035] In one or more embodiments of the utility model, the bored piles or pier foundations 1 are evenly arranged around the existing well and are set close to the existing well 6. By evenly arranging the bored piles or pier foundations 1 around the existing well and setting them close to the existing well 6, it can serve as the basis of the cover plate reinforcement structure and transfer the vertical load to the foundation soil bearing layer.

[0036] In practice, the bored cast-in-place piles or pier foundations 1 are located around the existing well 6 and are evenly arranged; when the soil 003 around the well is old clay or rock, a pier foundation can be used, and when the soil 003 around the well is soft plastic clay, bored cast-in-place piles can be used; the bored cast-in-place piles or pier foundations 1 are all made of reinforced concrete, which should meet the requirements of the embedding depth. They have a certain lateral stiffness, provide a certain lateral support for the existing well 6, and reduce the lateral pressure of the soil on both sides of the well 6; they are in direct contact with the foundation soil and also serve as the basis for strengthening the structure, providing Vertical bearing capacity: The horizontal bearing capacity is determined by controlling the deformation of the top surface of the foundation (Article 13.2.9 of the Technical Code for Building Slope Engineering GB50330-2013 stipulates that the deformation limit is 10mm). The vertical bearing capacity is mainly composed of the side friction and end resistance of the foundation soil. The length, diameter and spacing are determined according to the required horizontal and vertical bearing capacities, and the reinforcement is determined by calculating the foundation's compressive and bending bearing capacities. The foundation diameter is generally 800-1200mm, and the spacing is generally 1000-2000mm.

[0037] In one or more embodiments of the utility model, the buffer filler 4 is made of flexible material. By using flexible material, a buffer zone can be formed to prevent the deformation of the cover plate structure 3 from directly affecting the existing well 6, which is beneficial to protecting the existing well 6. Here, the buffer filler 4 can be made of polyethylene closed-cell foam board, which belongs to the buffer zone; when the vehicle load or other large vertical load acts on the cover plate structure 3, the cover plate structure 3 will produce vertical deformation, and the buffer zone can effectively prevent the deformation of the cover plate structure 3 from directly affecting the heavy existing well 6.

[0038] In practice, the thickness of the buffer filler 4 is not fixed and can be flexibly adjusted according to the span of the reinforced concrete cover structure 3 and the designed road surface 001 road grade. When the cover structure 3 is greatly deformed, its influence can be eliminated by thickening the buffer filler 4. This solution is flexible, convenient and practical.

[0039] In one or more embodiments of the utility model, the cover plate structure 3, the ring frame crown beam 2, the bored pile or the pier foundation 1 are all made of reinforced concrete, and must be reliably connected to form an integral structure with sufficient vertical and horizontal rigidity. The steel bars in the bored pile or the pier foundation 1 must be anchored in the ring frame crown beam 2. The ring frame crown beam 2 and the cover plate structure 3 are generally connected by mortar. The cover plate steel bars can also be anchored in the ring frame crown beam 2 to enhance the connection rigidity.

[0040] Compared with the traditional existing well reconstruction treatment, the cover plate reinforcement structure for existing well protection of the utility model has the following advantages:

[0041] 1. The structural components of the utility model can coordinate and balance the forces, the structural size is small, the occupied area is small, the demand for construction sites for existing well protection is reduced, and the scope of application is wider; especially for the limited site conditions, the large excavation construction is difficult, and reliable diversion cannot be carried out, the utility model solves this kind of problem well;

[0042] 2. The utility model has a simple structure and is easy to construct. It adopts pile foundation or pier foundation, and the construction excavation working surface is small. The disturbance to the existing well during the implementation process is small, which can better ensure the safety of the existing well.

[0043] 3. The utility model sets a buffer filler between the cover plate structure and the existing well, which can allow the cover plate structure to have a certain deformation. This moderate deformation allowable value further enhances the applicability of the protection structure;

[0044] 4. The structural materials and structural forms adopted by the utility model can be flexibly adjusted according to the actual situation on site, which is practical and convenient;

[0045] 5. The overall layout of the utility model is flexible, the structure is safe and reliable, and the quality is controllable, which can effectively ensure the safety of existing wells.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cover plate reinforcement structure for existing well protection, characterized in that: The invention comprises a cover plate structure (3) arranged on the top of an existing well (6), bored cast-in-place piles or pier foundations (1) and a ring frame crown beam (2); the bored cast-in-place piles or pier foundations (1) are arranged around the outer periphery of the existing well (6); the ring frame crown beam (2) is arranged between the cover plate structure (3) and the bored cast-in-place piles or pier foundation (1); and a buffer filler (4) is arranged between the cover plate structure (3) and the upper end of the existing well (6).

2. The cover plate reinforcement structure for existing well protection according to claim 1 is characterized in that: The cover plate structure (3) is arranged between the designed road surface (001) and the existing well (6) to isolate the load above the cover plate structure (3).

3. The cover plate reinforcement structure for existing well protection according to claim 2 is characterized in that: The cover plate structure (3) is a whole reinforced concrete plate, and openings are provided through the cover plate structure (3).

4. The cover plate reinforcement structure for existing well protection according to claim 2 is characterized in that: The cover plate structure (3) is provided with a maintenance shaft (5) which is connected to the existing shaft (6), and the maintenance shaft (5) is located between the cover plate structure (3) and the designed road surface (001).

5. The cover plate reinforcement structure for existing well protection according to claim 4 is characterized in that: The inspection shaft (5) is formed by cast-in-place plain concrete or a prefabricated shaft.

6. The cover plate reinforcement structure for existing well protection according to claim 3 is characterized in that: The ring frame crown beam (2) adopts a reinforced concrete structure and is integrally connected with the bored cast-in-place pile or pier foundation (1).

7. The cover plate reinforcement structure for existing well protection according to any one of claims 1 to 6, characterized in that: The bored cast-in-place piles or pier foundations (1) are evenly arranged around the existing well and are set close to the existing well (6).

8. The cover plate reinforcement structure for existing well protection according to any one of claims 1 to 6, characterized in that: The buffer filler (4) is made of flexible material.

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