Reinforced concrete supporting foundation pit with reinforcing structure

Abstract

The utility model discloses a reinforced concrete support foundation pit with a reinforcing structure, which comprises a reinforced concrete inner support foundation pit body, the reinforced concrete inner support foundation pit body comprises a plurality of support top beams and a plurality of inner support beams, and the plurality of support top beams are sequentially connected end to end to form a square frame. An inner supporting beam is connected between every two adjacent supporting top beams, and a suspended section is formed in the middle of each supporting top beam and located between one ends of every two adjacent inner supporting beams. The structure further comprises at least one reinforcing structure, the reinforcing structure is fixedly connected with the suspended section, the reinforcing structure comprises a reinforcing top beam and two reinforcing cant beams integrally formed with the reinforcing top beam, the reinforcing top beam is fixedly arranged on the upper surface of one supporting top beam, and the two reinforcing cant beams are fixedly arranged on the upper surfaces of the two adjacent inner supporting beams respectively. The problems that in the prior art, when a concrete inner support is unbalanced in stress, a suspended section of a reinforced concrete top beam is prone to cracking, and safety risks exist are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting foundation pit reinforcement, in particular to a reinforced concrete supporting foundation pit with a reinforcement structure. Background Art

[0002] With the rapid and high-density development of urban construction, urban foundation pit support projects, as important underground structures, are facing more and more problems and they are becoming more and more complex. The foundation pit is no longer regarded as an independent force-bearing system. Its safety and economy are not studied. There are many pain points and difficulties that the foundation pit of this project and the foundation pit of surrounding projects are cross-constructed in time and space, and the construction process does not conform to the overall force-bearing system of the foundation pit.

[0003] As we all know, the construction sequence of other foundation pits outside the foundation pit red line has a very significant impact on the safety and economy of the foundation pit. When designing the construction drawings, the designers will clarify the construction sequence with all parties and make overall considerations to meet both safety and economy. However, the actual situation is difficult to predict, and it is also difficult to coordinate the construction sequence of adjacent foundation pits. It often happens that the excavation of the foundation pit of this project is very smooth, but small foundation pits such as driveways, septic tanks, and connecting passages are suddenly excavated outside the support piles.

[0004] Due to the unloading in the active area of ​​the foundation pit, unbalanced stress occurs in the concrete support, which makes the suspended section of the reinforced concrete crown beam prone to cracking. This danger poses a great threat to the safety of personnel and equipment. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and provide a reinforced concrete support foundation pit with a reinforcement structure to solve the problem in the prior art that when the concrete internal support is subjected to unbalanced force, the suspended section of the reinforced concrete crown beam is prone to cracking, which poses a safety risk.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a reinforced concrete support foundation pit with a reinforcement structure, comprising a reinforced concrete inner support foundation pit body, the reinforced concrete inner support foundation pit body comprising a plurality of support crown beams and a plurality of inner support beams, the plurality of support crown beams are connected in sequence end to end to form a square frame, an inner support beam is connected between two adjacent support crown beams, and the middle part of the support crown beam is located between one end of the two adjacent inner support beams to form a suspended section; it also includes at least one reinforcement structure, the reinforcement structure is fixedly connected to the suspended section, wherein the reinforcement structure comprises a reinforcement crown beam, and two reinforcement oblique beams integrally formed with the reinforcement crown beam, the reinforcement crown beam is fixedly arranged on the upper surface of one of the support crown beams, and the two reinforcement oblique beams are respectively fixedly arranged on the upper surfaces of the two adjacent inner support beams.

[0008] In some embodiments, the reinforced concrete inner support foundation pit body further includes a plurality of support piles, and the lower surface of each of the support crown beams is provided with a plurality of support piles at intervals along the length direction.

[0009] In some embodiments, a caulking mortar layer is laid between the reinforcement crown beam and the support crown beam, and between the two reinforcement oblique beams and the two inner support beams.

[0010] In some embodiments, the reinforcement crown beam and the support crown beam, and the two reinforcement oblique beams and the two inner support beams are fixedly connected by a plurality of connecting members.

[0011] In some embodiments, the connecting member includes a plurality of embedded steel bars fixed at one end in the supporting crown beam and the inner supporting beam, a plurality of connecting steel bars fixed in the reinforcing crown beam and the reinforcing oblique beam, and a plurality of grouting sleeves arranged in the reinforcing crown beam and the reinforcing oblique beam and sleeved on the connecting steel bars. The other end of each of the embedded steel bars can be inserted one by one into the corresponding grouting sleeves.

[0012] In some embodiments, the length of the reinforced crown beam is greater than the length of the suspended segment.

[0013] In some embodiments, at least one column is disposed on the lower surface of each of the supporting crown beams.

[0014] In some embodiments, the reinforced concrete inner support foundation pit body further includes a plurality of longitudinal beams, each of two adjacent support crown beams is connected with a longitudinal beam, and the length of the longitudinal beam is less than the length of the inner support beam.

[0015] In some embodiments, two reinforcing beams are connected between the longitudinal beam and the supporting crown beam, and the two reinforcing beams and the longitudinal beam form a triangular frame.

[0016] In some embodiments, the length of the reinforcing diagonal beam is 1 / 6-1 / 4 of the length of the inner support beam.

[0017] Compared with the prior art, the utility model provides a reinforced concrete support foundation pit with a reinforcement structure, which is formed by connecting a plurality of support crown beams end to end in sequence to form a square frame, an inner support beam is connected between two adjacent support crown beams, and the middle part of the support crown beam is located between one end of the two adjacent inner support beams to form a suspended section; the reinforcement structure is fixedly connected to the suspended section, wherein the reinforcement structure includes a reinforcement crown beam, and two reinforcement oblique beams integrally formed with the reinforcement crown beam, the reinforcement crown beam is fixedly arranged on the upper surface of a support crown beam, and the two reinforcement oblique beams are respectively fixedly arranged on the upper surfaces of the two adjacent inner support beams; it can effectively improve the structural strength of the suspended section of the support crown beam, improve the ability of the suspended section to resist damage, avoid further expansion of cracks in the suspended section of the support crown beam, and ensure that the reinforced concrete inner support foundation pit can be smoothly constructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a reinforced concrete support foundation pit with a reinforcement structure provided by an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a reinforcement structure provided by an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection between the reinforcement crown beam and the support crown beam provided by the embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the connection between the reinforcing oblique beam and the inner supporting beam provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] In order to solve the technical problem in the prior art that when the concrete inner support is subjected to unbalanced force, the suspended section of the reinforced concrete crown beam is prone to cracking, which poses a safety risk, the utility model provides a reinforced concrete support foundation pit with a reinforcement structure, which can improve the structural strength of the suspended section within the reinforced concrete inner support foundation pit body.

[0024] See also Figure 1-Figure 4 , Figure 1-Figure 4A reinforced concrete support foundation pit with a reinforcement structure in one embodiment of the utility model comprises a reinforced concrete inner support foundation pit body 1, wherein the reinforced concrete inner support foundation pit body 1 comprises a plurality of support crown beams 11 and a plurality of inner support beams 12, wherein the plurality of support crown beams 11 are connected end to end in sequence to form a square frame, an inner support beam 12 is connected between two adjacent support crown beams 11, and the middle portion of the support crown beam 11 is located between one end of the two adjacent inner support beams 12 to form a suspended section; and further comprises at least one reinforcement structure 2, wherein the reinforcement structure 2 is fixedly connected to the suspended section, wherein the reinforcement structure comprises a reinforcement crown beam 21, and two reinforcement oblique beams 22 integrally formed with the reinforcement crown beam 21, wherein the reinforcement crown beam 21 is fixedly arranged on the upper surface of one of the support crown beams 11, and the two reinforcement oblique beams 22 are respectively fixedly arranged on the upper surfaces of the two adjacent inner support beams 12.

[0025] Specifically, the reinforced concrete inner support pit body 1 also includes a plurality of supporting piles 13, and the lower surface of each supporting crown beam 11 is provided with a plurality of supporting piles 13 at intervals along the length direction; it should be noted that the lower ends of the plurality of supporting piles 13 are inserted into the foundation, the highest points of the upper ends of the plurality of supporting piles 13 are in the same plane, and the upper ends of the plurality of supporting piles 13 are fixedly connected to the plurality of supporting crown beams 11.

[0026] On the basis of the above scheme, in order to improve the structural strength of the reinforced concrete inner support pit body 1, specifically, each of the supporting crown beams 11 is provided with at least one column 14 on the lower surface. In the present specific embodiment, the number of the column 14 is one, and the column 14 supports the middle position of the inner support beam 12.

[0027] In order to further improve the structural strength of the reinforced concrete inner support pit body 1, specifically, the reinforced concrete inner support pit body 1 also includes a plurality of longitudinal beams 15, each of the two adjacent support crown beams 11 is connected with a longitudinal beam 15, and the length of the longitudinal beam 15 is less than the length of the inner support beam 12.

[0028] In addition, two reinforcing beams 16 are connected between the longitudinal beam 15 and the supporting crown beam 11 , and the two reinforcing beams 16 and the longitudinal beam 15 enclose a triangular frame.

[0029] In this specific embodiment, the reinforcing crown beam 21 and the supporting crown beam 11 as well as the two reinforcing oblique beams 22 and the two inner supporting beams 12 are fixedly connected via a plurality of connecting members 4 .

[0030] It should be noted that the connecting member 4 is not limited to a specific structure, as long as it can achieve fixed connection between the reinforcing structure 2 and the suspended section, and no further details are given here.

[0031] In this specific embodiment, a caulking mortar layer 3 is laid between the reinforcing crown beam 21 and the supporting crown beam 11 and between the two reinforcing oblique beams 22 and the two inner supporting beams 12 .

[0032] In one embodiment, see Figure 3 and Figure 4 The connecting member 4 includes a plurality of embedded bars 41 fixed at one end in the supporting crown beam 11 and the inner supporting beam 12, a plurality of connecting bars 42 fixed in the reinforcing crown beam 21 and the reinforcing oblique beam 22, and a plurality of grouting sleeves 43 arranged in the reinforcing crown beam 21 and the reinforcing oblique beam 22 and sleeved on the connecting bars 42. The other end of each embedded bar 41 can be inserted into the corresponding grouting sleeves 43 one by one.

[0033] Specifically, the grouting sleeve 43 is provided with a grouting inlet hole and a grouting outlet hole, and the grouting outlet hole is located above the grouting inlet hole. After pouring mortar into the grouting sleeve 43, the grouting inlet hole and the grouting outlet hole need to be sealed by a cover plate. It should be noted that the reinforced crown beam 21 and the reinforced inclined beam 22 are both prefabricated reinforced concrete components, and during construction, an appropriate amount of early strength agent and quick-setting agent need to be added to the mortar for rapid reinforcement.

[0034] In addition, one end of a plurality of embedded bars 41 is inserted into the supporting crown beam 11 and the inner supporting beam 12 to a depth that is 10 times the inner diameter of the embedded bars 41 .

[0035] In one embodiment, the length of the reinforcing crown beam 21 is greater than the length of the suspended section. Specifically, the length of the suspended section extending from the opposite ends of the reinforcing crown beam 21 is greater than 3m. The length of the reinforcing oblique beam 22 is greater than 1m. The length of the reinforcing oblique beam 22 is 1 / 6-1 / 4 of the length of the inner support beam 12. Specifically, the length of the reinforcing oblique beam 22 is 1 / 4 of the length of the inner support beam 12. In addition, the width of the reinforcing oblique beam 22 is the same as the width of the supporting crown beam 11, and the width of the reinforcing oblique beam 22 is smaller than the width of the inner support beam 12. In this specific embodiment, the width between the opposite sides of the reinforcing oblique beam 22 and the opposite sides of the inner support beam 12 is 100mm.

[0036] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A reinforced concrete support pit with a reinforcement structure, comprising a reinforced concrete inner support pit body, the reinforced concrete inner support pit body comprising a plurality of support crown beams and a plurality of inner support beams, the plurality of support crown beams are sequentially connected end to end to form a square frame, an inner support beam is connected between each of two adjacent support crown beams, and the middle portion of the support crown beam is located between one end of the two adjacent inner support beams to form a suspended section; characterized in that: It also includes at least one reinforcement structure, which is fixedly connected to the suspended section, wherein the reinforcement structure includes a reinforcement crown beam and two reinforcement oblique beams integrally formed with the reinforcement crown beam, the reinforcement crown beam is fixedly arranged on the upper surface of one of the support crown beams, and the two reinforcement oblique beams are respectively fixedly arranged on the upper surfaces of two adjacent inner support beams.

2. A reinforced concrete support foundation pit with a reinforcement structure according to claim 1, characterized in that: The reinforced concrete inner support foundation pit body also includes a plurality of support piles, and the lower surface of each support crown beam is provided with a plurality of support piles at intervals along the length direction.

3. The reinforced concrete support foundation pit with a reinforcement structure according to claim 1, characterized in that: A caulking mortar layer is laid between the reinforcement crown beam and the support crown beam, and between the two reinforcement oblique beams and the two inner support beams.

4. The reinforced concrete support foundation pit with a reinforcement structure according to claim 1, characterized in that: The reinforcing crown beam and the supporting crown beam as well as the two reinforcing oblique beams and the two inner supporting beams are fixedly connected via a plurality of connecting pieces.

5. The reinforced concrete support foundation pit with a reinforcement structure according to claim 4, characterized in that: The connecting member includes a plurality of embedded steel bars with one end fixed in the supporting crown beam and the inner supporting beam, a plurality of connecting steel bars fixed in the reinforcing crown beam and the reinforcing oblique beam, and a plurality of grouting sleeves arranged in the reinforcing crown beam and the reinforcing oblique beam and sleeved on the connecting steel bars. The other end of each embedded steel bar can be inserted into the corresponding grouting sleeve one by one.

6. The reinforced concrete support foundation pit with a reinforcement structure according to claim 1, characterized in that: The length of the reinforced crown beam is greater than the length of the suspended section.

7. The reinforced concrete support foundation pit with a reinforcement structure according to claim 1, characterized in that: The lower surface of each supporting crown beam is provided with at least one column.

8. The reinforced concrete support foundation pit with a reinforcement structure according to claim 1, characterized in that: The reinforced concrete inner support foundation pit body also includes a plurality of longitudinal beams, each of which is connected to any two adjacent support crown beams, and the length of the longitudinal beam is less than the length of the inner support beam.

9. The reinforced concrete support foundation pit with a reinforcement structure according to claim 8, characterized in that: Two reinforcing beams are connected between the longitudinal beam and the supporting crown beam, and the two reinforcing beams and the longitudinal beam are combined to form a triangular frame.

10. The reinforced concrete support foundation pit with a reinforcement structure according to claim 1, characterized in that: The length of the reinforcing diagonal beam is 1 / 6-1 / 4 of the length of the inner supporting beam.

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