Hydraulic structure combined with cast-in-place pile support permanently and temporarily and construction method of hydraulic structure

Abstract

The invention relates to a hydraulic structure permanently and temporarily combined with a cast-in-place pile support and a construction method of the hydraulic structure. The method is suitable for the technical field of water conservancy and hydropower engineering. The technical problem to be solved by the invention is to provide the hydraulic structure permanently and temporarily combined with the cast-in-place pile support and the construction method of the hydraulic structure. According to the technical scheme, the hydraulic structure combined with the cast-in-place pile support permanently and temporarily comprises a support structure and a plurality of cast-in-place piles, the cast-in-place piles are arranged on the two sides of a river channel respectively, and the cast-in-place piles are matched to provide foundation pit support in the construction period and form a side pier structure of the hydraulic structure; the supporting structure is arranged between the cast-in-place piles on the two sides, and the supporting structure is matched with the cast-in-place piles to provide foundation support for the hydraulic structure; and the upper building is arranged above the supporting structure and the supporting structure, and a gate and trash rack structure is arranged at the bottom of the upper building.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a hydraulic structure combined with cast-in-place pile support and a construction method thereof. Background Art

[0002] Many of the sluice gates and pumping stations in operation in my country were built in the 20th century, and the projects have played an irreplaceable role in local development. However, due to the technical conditions and economic level of the last century, most buildings have undergone multiple reinforcement and repairs, and the design standards, structural types and major building damage can no longer meet the current operating conditions. In addition, in recent years, extreme weather has occurred frequently, and many buildings have been overloaded, resulting in a large number of dangerous buildings that need to be demolished and rebuilt as a whole.

[0003] With the development of cities and towns, most buildings are surrounded by buildings on both sides, which makes demolition difficult and excavation affects building safety. In order to ensure the safety of the surrounding area and facilitate construction, it is necessary to consider the use of support solutions. However, the use of support solutions is difficult, the project investment is large, and most temporary buildings will be demolished after construction.

[0004] Therefore, in order to facilitate construction, shorten construction period and optimize investment, the present application proposes a hydraulic structure combined with cast-in-place pile support and a construction method thereof. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in view of the above existing problems, a hydraulic structure combined with cast-in-place pile support and a construction method thereof are provided.

[0006] The technical solution adopted by the present invention is: a hydraulic structure combined with cast-in-place pile support, comprising:

[0007] The supporting structure includes a plurality of cast-in-place piles, which are arranged on both sides of the river channel. The plurality of cast-in-place piles cooperate to provide foundation pit support during the construction period and form a side pier structure of the hydraulic structure;

[0008] A support structure is provided between the cast-in-place piles on both sides, and the support structure cooperates with the cast-in-place piles to provide basic support for the hydraulic structure;

[0009] The superstructure is arranged above the retaining structure and the supporting structure, and a gate and a trash rack structure are arranged at the bottom of the superstructure.

[0010] Through the above-mentioned technical means, bored piles are used as temporary supporting structures for foundation pits, and bored piles can be used in conjunction with supporting structures as supporting foundations for superstructures, which not only facilitates construction and shortens construction periods, but also optimizes the amount of excavation for side pier structure construction, the amount of surrounding land acquisition and relocation, and the cost of side piers for permanent buildings.

[0011] In some embodiments, the supporting structure includes a middle pier and a base plate, the two ends of the base plate are respectively connected to the inner walls of the cast-in-place piles on both sides, a plurality of middle piers are arranged on the top of the base plate, and the superstructure is arranged above the middle piers and the cast-in-place piles.

[0012] In some embodiments, the middle pier and the bottom plate are integrally bound with reinforced concrete and cast into shape.

[0013] In some embodiments, an anchor is pre-buried inside the cast-in-place pile connected to the base plate, the end of the base plate is integrally anchored to the anchor, and a water stop is also provided at the connection between the base plate and the cast-in-place pile.

[0014] In some embodiments, the cast-in-place piles at the junction with the gate and trash rack structure are processed by skipping piles, and the soil between the two piles is provided with jet grouting piles, and gate grooves corresponding to the gate and trash rack structure are reserved on the jet grouting piles and the middle pier.

[0015] In some embodiments, a concrete facing layer is provided on the river-facing side wall of the bored pile, and the thickness of the concrete facing layer is 10 cm to 20 cm.

[0016] In some embodiments, the pile diameter and length of the bored pile are determined according to soil layer, cantilever length and load calculation.

[0017] Another technical solution adopted by the present invention is: a method for constructing a hydraulic structure combined with cast-in-place pile support, which is applied to a hydraulic structure combined with cast-in-place pile support, and comprises the following steps:

[0018] S1. Demolish old buildings and construct cast-in-place piles at predetermined locations as temporary support structures for excavating foundation pits. Some cast-in-place piles are treated by skipping piles. The diameter and length of the cast-in-place piles are determined based on soil layers, cantilever length and load calculations;

[0019] S2. After the construction of the cast-in-place piles is completed, the foundation pit is excavated according to the designed depth;

[0020] S3. Tie the steel bars of the bottom plate and the middle pier in the foundation pit to ensure that they are connected to the anchors reserved in the cast-in-place piles, and then cast them as one;

[0021] S4. Use water-stopping parts to perform water-stopping processing on the connection between the base plate and the cast-in-place pile to ensure the airtightness of the connection;

[0022] S5. Reserve the gate slots required for gate installation on the cast-in-place piles and the middle pier, and reinforce the soil between the cast-in-place piles outside the gate slot with jet grouting piles. The length of the jet grouting piles is calculated and determined according to the scale of the sluice or pump station.

[0023] S6. Install the gate and trash rack structure into the gate slot, and construct the support columns and main structure of the upper building on the side pier structure and middle pier foundation formed by cast-in-place piles;

[0024] S7. Carry out concrete facing treatment on the inner wall of the river side of the bored pile to form a concrete facing layer.

[0025] The beneficial effects of the present invention are:

[0026] 1. By using cast-in-place piles for permanent and temporary combination, it can be used as a foundation pit support structure in the early stage of construction, and as the side pier structure and the foundation of the upper structure of the hydraulic structure in the later stage. It not only facilitates construction and shortens the construction period, but also optimizes the excavation volume of the side pier construction, the surrounding relocation volume and the cost of the permanent building side. This structure can reduce the excavation surface and construction difficulty, save project investment while ensuring safety, and can be widely used in demolition and reconstruction projects such as sluices and pump stations that are difficult to relocate and have insufficient excavation surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cross-sectional structure of this application.

[0028] Figure 2 It is a schematic diagram of the planar structure of this application.

[0029] Description of reference numerals:

[0030] 1. Cast-in-place piles; 2. Middle pier; 3. Bottom plate; 4. Gate and trash rack structure; 5. Concrete surface layer; 6. Water stop; 7. Gate groove; 8. Jet jet piles; 9. Superstructure.

[0031] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures or characteristics may be combined in any suitable manner consistent with the present disclosure.

[0032] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.

[0033] "First," "second," etc. As used herein, these terms act as labels for the nouns that precede them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0035] Embodiment 1:

[0036] Combination Figure 1 to Figure 2 As shown, this embodiment is a hydraulic structure combined with cast-in-place pile support, including a support structure, a supporting structure and an upper structure 9. The support structure includes a plurality of cast-in-place piles 1, which are arranged on both sides of the river. The plurality of cast-in-place piles 1 can provide foundation pit support during the construction period and form the side pier structure of the hydraulic structure. A support structure is arranged between the cast-in-place piles 1 on both sides, and the support structure and the cast-in-place piles 1 cooperate to provide basic support for the hydraulic structure; an upper structure 9 is arranged above the support structure and the supporting structure, and a gate and a trash rack structure 4 are arranged at the bottom of the upper structure 9. In this embodiment, the upper structure 9 is a sluice or a pump station.

[0037] In some embodiments, the supporting structure includes a middle pier 2 and a base plate 3, the two ends of the base plate 3 are respectively connected to the inner walls of the cast-in-place piles 1 on both sides, a plurality of middle piers 2 are arranged on the top of the base plate 3, and an upper structure 9 is arranged above the middle piers 2 and the cast-in-place piles 1.

[0038] Furthermore, the middle pier 2 and the bottom plate 3 are integrally bound with reinforced concrete and cast into shape.

[0039] Furthermore, an anchor is pre-buried inside the cast-in-place pile 1 connected to the base plate 3 , the end of the base plate 3 is integrally anchored with the anchor, and a water stop 6 is also provided at the connection between the base plate 3 and the cast-in-place pile 1 .

[0040] Furthermore, the cast-in-place pile 1 at the junction with the gate and the trash rack structure 4 adopts a jump pile treatment, and a jet grouting pile 8 is provided in the soil between the two piles. A gate slot 7 corresponding to the gate and the trash rack structure 4 is reserved on the jet grouting pile 8 and the middle pier 2. Specifically, the length of the jet grouting pile 8 is calculated and determined according to the scale of the sluice or pump station.

[0041] Furthermore, a concrete facing layer 5 is provided on the river side wall of the bored pile 1, and the concrete facing layer 5 is located between the gate and trash rack structure 4 and the bored pile 1, and the thickness of the concrete facing layer 5 is 10 cm to 20 cm, which is determined according to the structural size and gate height.

[0042] Furthermore, the pile diameter and length of the bored pile 1 are determined according to soil layer, cantilever length and load calculation.

[0043] Embodiment 1 Implementation principle of a hydraulic structure combined with cast-in-place pile support:

[0044] By using cast-in-place piles 1 in combination with permanent and temporary structures, which not only serve as foundation pit support during the construction period, but also reserve anchors connected to the bottom plate 3, the foundation pit is excavated and used as the foundation for the side piers and upper building columns of hydraulic structures such as sluices and pump stations in the later stage, thus optimizing the excavation volume of side pier construction, the amount of surrounding land acquisition and relocation, and the cost of permanent building side piers. Through the combination of permanent and temporary building structure types, the excavation surface and construction difficulty are reduced, and the project investment is saved while ensuring safety. It can be widely used in demolition and reconstruction projects such as sluices and pump stations where land acquisition and demolition are difficult and the excavation surface is insufficient.

[0045] Embodiment 2:

[0046] This embodiment is a method for constructing a hydraulic structure combined with cast-in-place pile support, which is applied to the hydraulic structure combined with cast-in-place pile support in the first embodiment, and includes the following steps:

[0047] S1. Demolish the old building and construct cast-in-place piles 1 at the predetermined position as a temporary support structure for the excavation pit. Some cast-in-place piles 1 are processed by skipping piles. The pile diameter and length of the cast-in-place piles 1 are determined according to the soil layer, cantilever length and load calculation;

[0048] S2. After the construction of the cast-in-place pile 1 is completed, the foundation pit is excavated according to the designed depth;

[0049] S3, tie the steel bars of the bottom plate 3 and the middle pier 2 in the foundation pit to ensure that they are connected to the anchors reserved in the cast-in-place pile 1, and then cast them as one;

[0050] S4, using the water stop 6 to perform water stop processing on the connection between the base plate 3 and the cast-in-place pile 1 to ensure the airtightness of the connection;

[0051] S5. Reserve a gate slot 7 required for gate installation on the cast-in-place pile 1 and the middle pier 2, and reinforce the soil between the cast-in-place piles 1 outside the gate slot 7 with a jet grouting pile 8. The length of the jet grouting pile 8 is calculated and determined according to the scale of the sluice or pump station;

[0052] S6. Install the gate and trash rack structure 4 into the gate slot 7, and construct the support columns and main structure of the upper building 9 on the basis of the side pier structure and the middle pier 2 formed by the cast-in-place piles 1;

[0053] S7, performing concrete facing treatment on the inner wall of the river-facing side of the cast-in-place pile 1 to form a concrete facing layer 5.

[0054] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic structure combined with cast-in-place pile support, characterized in that: include: The support structure comprises a plurality of cast-in-place piles (1), the plurality of cast-in-place piles (1) are arranged on both sides of a river channel, and the plurality of cast-in-place piles (1) cooperate to provide foundation pit support during the construction period and form a side pier structure of a hydraulic structure; A support structure is arranged between the cast-in-place piles (1) on both sides, and the support structure cooperates with the cast-in-place piles (1) to provide foundation support for the hydraulic structure; The superstructure (9) is arranged above the retaining structure and the supporting structure, and a gate and a trash rack structure (4) are arranged at the bottom of the superstructure (9).

2. A hydraulic structure combined with cast-in-place pile support as claimed in claim 1, characterized in that: The supporting structure comprises a middle pier (2) and a bottom plate (3), the two ends of the bottom plate (3) are respectively connected to the inner walls of the cast-in-place piles (1) on both sides, a plurality of middle piers (2) are arranged on the top of the bottom plate (3), and the upper structure (9) is arranged above the middle piers (2) and the cast-in-place piles (1).

3. A hydraulic structure combined with cast-in-place pile support as claimed in claim 2, characterized in that: The middle pier (2) and the bottom plate (3) are integrally bound with reinforced concrete and cast into shape.

4. A hydraulic structure combined with cast-in-place pile support as claimed in claim 2, characterized in that: Anchors are pre-buried inside the cast-in-place piles (1) connected to the base plate (3); the ends of the base plate (3) are integrally anchored to the anchors; and a water stop (6) is also provided at the connection between the base plate (3) and the cast-in-place piles (1).

5. A hydraulic structure combined with cast-in-place pile support for permanent and temporary use according to claim 2, characterized in that: The cast-in-place pile (1) at the junction with the gate and trash rack structure (4) adopts a skip pile treatment, and a jet grouting pile (8) is provided in the soil between the two piles. A gate groove (7) corresponding to the gate and trash rack structure (4) is reserved on the jet grouting pile (8) and the middle pier (2).

6. A hydraulic structure combined with cast-in-place pile support as claimed in claim 1, characterized in that: A concrete facing layer (5) is provided on the river-facing side wall of the cast-in-place pile (1), and the thickness of the concrete facing layer (5) is 10 cm to 20 cm.

7. A hydraulic structure combined with cast-in-place pile support for permanent and temporary use according to claim 1, characterized in that: The pile diameter and length of the cast-in-place pile (1) are determined by soil layer, cantilever length and load calculation.

8. A method for constructing a hydraulic structure combined with permanent cast-in-place pile support, characterized in that: The method applied to the hydraulic structure combined with the permanent and temporary support of cast-in-place piles as claimed in any one of claims 1 to 7 comprises the following steps: S1. Demolish the old building and construct cast-in-place piles (1) at the predetermined position as a temporary support structure for the excavation pit. Some cast-in-place piles (1) are treated by skipping piles. The pile diameter and length of the cast-in-place piles (1) are determined according to the soil layer, cantilever length and load calculation; S2. After the construction of the cast-in-place pile (1) is completed, excavation of the foundation pit is carried out according to the designed depth; S3, tying the steel bars of the bottom plate (3) and the middle pier (2) in the foundation pit to ensure that they are connected to the anchors reserved in the cast-in-place piles (1), and then casting them as a whole; S4. Perform water-stopping processing on the connection between the base plate (3) and the cast-in-place pile (1) using the water-stopping member (6) to ensure the airtightness of the connection; S5. A gate groove (7) required for gate installation is reserved on the cast-in-place pile (1) and the middle pier (2), and a jet grouting pile (8) is constructed to reinforce the soil between the cast-in-place piles (1) outside the gate groove (7). The length of the jet grouting pile (8) is calculated and determined according to the scale of the sluice or pump station; S6, installing the gate and trash rack structure (4) into the gate groove (7), and constructing the support columns and main structure of the upper building (9) on the basis of the side pier structure and the middle pier (2) formed by the cast-in-place piles (1); S7, performing concrete facing treatment on the inner wall of the river-facing side of the bored pile (1) to form a concrete facing layer (5).

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