Gate shaft structure located on soft foundation
By constructing foundation piles, pile cap slabs, and flow channel concrete structures on soft soil, and combining them with well shaft concrete, an integral rigid gate well structure is formed, which solves the settlement and deformation problems of gate wells on soft soil and achieves stable opening and closing of gate wells.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional gate well structures are difficult to control settlement and deformation on soft foundations, leading to problems such as well tilting and gates being unable to open or close, and are particularly unsuitable when the location of the building is limited.
The system employs a combination of foundation piles, pile cap slabs, retaining piles, and bottom ring beams with a concrete channel and shaft structure to form an integral rigid structure. The foundation piles penetrate deep into the bedrock to limit settlement and deformation. Gradient sections with non-removable steel formwork and PVC waterstops are installed within the channel to control the smoothness of water flow.
It effectively limits the settlement and deformation of the gate well, ensures the rigidity and stability of the gate well structure, ensures that the gate can be opened and closed normally, and meets the high requirements on soft foundations.
Smart Images
Figure CN224031750U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of gate well, especially relates to a gate well structure on soft foundation. BACKGROUND
[0002] In hydraulic structures, the gate well is an important structure for controlling the opening and closing of the gate of the water delivery system, and it is very important for the structure type to close the gate in emergency situations to ensure the safety of the power station and avoid the risk of expansion. Due to the bidirectional characteristics of the water flow in the pumped storage power station tunnel, the gate well structure type has high requirements, and the gate well type is diverse, mostly based on rock foundation or hard soil foundation conditions, and the gate well on soft foundation is rarely involved. In the case of limited excavation at the location of the building, especially in the case of difficult large-area excavation and difficult adjustment of the position, it may be necessary to set up a gate well on soft foundation, but the bearing capacity of soft foundation is low, and deformation and settlement defects are easy to occur. The conventional gate well cannot be used to bear external water and soil pressure after self-excavation and structure completion, and cannot meet the high requirements of deformation control, which may cause problems such as inclination of the well body, gate opening and closing, etc. SUMMARY
[0003] The utility model aims at overcoming the defects of the prior art, and provides a gate well structure on soft foundation, which can solve the problem that the traditional gate well structure on soft foundation cannot meet the requirements of settlement and deformation control.
[0004] Therefore, the utility model adopts the following technical scheme:
[0005] A gate well structure on soft foundation comprises a circle of foundation piles that are deeply excavated below the bedrock, a circle of excavation retaining piles is arranged around the foundation piles, a pile top pile cap plate is arranged on the top of the foundation piles, a bottom circle beam for excavation is arranged between the pile top pile cap plate and the retaining piles, a flow channel concrete structure is arranged on the top of the pile top pile cap plate, and a well shaft concrete structure is arranged above the flow channel concrete structure.
[0006] On the basis of the above technical scheme, the utility model can also adopt the following further technical schemes, or use these further technical schemes in combination:
[0007] A gate slot sill second-stage concrete is arranged in the flow channel, the bottom surface of the gate slot sill second-stage concrete is connected with the flow channel concrete structure, gate slot side wall second-stage concretes are further arranged on both sides of the flow channel, and the top of the gate slot side wall second-stage concretes extends to the top of the well shaft concrete structure.
[0008] A gradually changing section detachable steel formwork is arranged on the inner wall of the flow channel concrete structure.
[0009] Structural joints are provided at the upstream and downstream of the flow channel. The structural joints are located at the upper part of the concrete structure of the flow channel. PVC waterstops are provided at both ends of the tunnel between the concrete structures of the flow channel.
[0010] The outer perimeter of the well shaft concrete structure is provided with a supporting ring beam.
[0011] A maintenance room is located above the concrete structure of the well shaft. The maintenance room includes a floor slab, side walls, and a staircase.
[0012] The maintenance chamber is surrounded by backfill soil, and an opening and closing platform and a gate hoist are provided above the maintenance chamber.
[0013] The concrete structure of the flow channel and the concrete structure of the well shaft are provided with vent steel pipes. One end of the vent steel pipe is connected to the flow channel, and the other end of the vent steel pipe extends upward to the outside to communicate with the outside air.
[0014] The cross-section of the well shaft concrete structure is circular.
[0015] The cross-sectional shape of the middle section of the flow channel within the concrete structure is rectangular, gradually changing to a circle from the center outwards.
[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects: the foundation piles and pile top cap plate combined with the excavation retaining piles and bottom ring beams during the excavation period effectively limit the settlement and deformation of the gate well. The pile top cap plate, the flow channel concrete structure, and the well shaft concrete structure are cast as a whole, further increasing the rigidity of the gate well structure. Attached Figure Description
[0017] Figure 1 This is a cross-sectional structural diagram of the present invention.
[0018] Figure 2 This utility model Figure 1 AA sectional view.
[0019] Figure 3 This utility model Figure 1 BB cross-sectional view.
[0020] Figure 4 This utility model Figure 3 CC section view.
[0021] Figure 5 This utility model Figure 1 DD sectional view.
[0022] Figure 6 This utility model Figure 5 EE sectional view.
[0023] Figure 7 This utility model Figure 5 FF sectional view.
[0024] Figure 8 This utility model Figure 5 GG cross-sectional view.
[0025] Figure 9 This utility model Figure 1 HH sectional view.
[0026] Figure 10 This utility model Figure 1 Sectional view II;
[0027] Figure 11 This utility model Figure 1 A cross-sectional view of JJ.
[0028] Figure 12 This utility model Figure 1 KK sectional view. Detailed Implementation
[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting this utility model. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this utility model.
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0031] This utility model provides a gate well structure located on a soft foundation, including a ring of foundation piles 1 extending below the bedrock, a ring of excavation retaining piles 2 surrounding the foundation piles 1, a pile top cap 4 on top of the foundation piles 1, an excavation bottom ring beam 3 between the pile top cap 4 and the excavation retaining piles 2, a flow channel concrete structure 5 on top of the pile top cap 4, and a well shaft concrete structure 12 above the flow channel concrete structure 5.
[0032] In this embodiment, the foundation pile 1 and the pile top cap 4 serve as the bottom foundation. Combined with the excavation retaining pile 2 and the excavation bottom ring beam 3 during the excavation period, they play a role in controlling settlement and deformation. The pile top cap 4, the flow channel concrete structure 5, and the well shaft concrete structure 12 are poured into a whole to further increase the rigidity of the gate well structure.
[0033] The flow channel concrete structure 5 and the well shaft concrete structure 12 are treated as a whole without structural joints.
[0034] The flow channel is equipped with a gate slot bottom sill secondary concrete 9, which serves as a load-bearing structure for the gate to fall to the bottom. The bottom surface of the gate slot bottom sill secondary concrete 9 is connected to the flow channel concrete structure 5. The flow channel is also equipped with gate slot side wall secondary concrete 10 on both sides, and the upper part of the gate slot side wall secondary concrete 10 extends to the top of the shaft concrete structure 12.
[0035] The inner wall of the concrete structure 5 of the flow channel is provided with a transition section of non-removable steel formwork 6.
[0036] Structural joints 7 are set at the upstream and downstream of the flow channel. The structural joints 7 are located on the upper part of the concrete structure 5 of the flow channel. PVC waterstops 8 are set at both ends of the tunnel between the concrete structures 5 of the flow channel.
[0037] The outer perimeter of the well shaft concrete structure 12 is provided with a support ring beam 13.
[0038] In this embodiment, the well shaft concrete structure 12 and the support ring beam 13 are integrally cast without joints.
[0039] A maintenance room is provided above the concrete structure 12 of the shaft. The maintenance room includes a floor slab 15, side walls 16, and stairs 18. The stairs 18 facilitate access for maintenance personnel.
[0040] In this embodiment, there is a water level fluctuation in the maintenance room, and it is necessary to ensure that the load conditions of internal water pressure and external water and soil pressure are met. The normal water level line 17 is located at the top of the maintenance room.
[0041] For ease of maintenance, the maintenance room adopts a rectangular cross-section.
[0042] The maintenance room is surrounded by backfill soil 20 to further limit structural deformation. The maintenance room is equipped with an opening and closing platform 19 and an opening and closing machine 21.
[0043] The gate can be opened and closed quickly by a hoist, which meets the functional requirements.
[0044] Ventilation pipes 14 are provided in the concrete structure 5 of the flow channel and the concrete structure 12 of the well shaft. One end of the ventilation pipe 14 is connected to the flow channel, and the other end of the ventilation pipe 14 extends upward to the outside to connect with the outside air, which facilitates the exhaust and intake of air when the gate is opened and closed.
[0045] The cross-section of the concrete structure 12 of the well shaft is circular.
[0046] The well shaft concrete structure 12 needs to be able to withstand external water pressure and soil pressure. In this embodiment, the well shaft concrete structure 12 adopts a circular cross section, which can better adapt to the high load of external water pressure and soil pressure.
[0047] The cross-sectional shape of the middle section of the flow channel in the concrete structure 5 is rectangular, and the cross-sectional shape of the middle section of the flow channel gradually changes to a circle from the middle to both sides.
[0048] The construction method of a gate well structure located on a soft foundation according to this utility model is as follows:
[0049] After drilling and pouring retaining piles 2 for excavation on the soft foundation and completing the well excavation, drilling and pouring foundation piles 1 at the bottom, with the top reinforcement of foundation pile 1 exposed.
[0050] The foundation plate 4 on top of the foundation pile 1 is poured to form an integral whole with the foundation pile 1 and the retaining piles 2 for excavation.
[0051] 5. The concrete structure of the flow channel is poured. There are gradual transition sections at both the upstream and downstream ends of the flow channel to ensure smooth water flow. The upstream and downstream gradual transition sections utilize non-removable steel formwork 6 to facilitate construction.
[0052] The flow channel is equipped with a second-stage concrete sill 9 for the door slot and a second-stage concrete sidewall 10, which extends all the way to the elevation of the maintenance room floor 15.
[0053] Then, the concrete structure 12 of the well shaft above the flow channel is poured. The concrete structure 12 of the well shaft and the ring beam 13 used for support in the previous excavation are poured as a whole without joints or formwork. A venting steel pipe is installed in the well shaft.
[0054] After the well shaft is poured, the maintenance room structure is poured on it, including the maintenance room floor slab 15 and the maintenance room side wall 16. At the same time, the maintenance room staircase 18 is set up, and the normal water level line 17 (positive water storage level) is located at the top of the maintenance room.
[0055] Concrete opening and closing platform 19 was poured on the maintenance room, and the opening and closing machine 21 was installed after the power was restored.
[0056] 20 cubic meters of soil were backfilled outside the maintenance room.
[0057] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the gate well structure located on a soft foundation according to this utility model, and can produce the positive effects described in this utility model.
[0058] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "connected," and "sleeve-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two mechanisms, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0059] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.
[0060] Furthermore, in practicing the claims of this utility model, those skilled in the art can understand and influence variations to the disclosed embodiments through a study of the drawings, the disclosure, and the appended claims. Additionally, in the claims and description, words such as "comprising" and "containing" do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.
[0061] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the present utility model are covered by the scope of the claims of the present utility model, and will not be listed here.
Claims
1. A gate well structure located on a soft foundation, characterized in that, The structure includes a ring of foundation piles (1) extending below the bedrock, a ring of excavation retaining piles (2) surrounding the foundation piles (1), a pile top cap plate (4) on top of the foundation piles (1), a bottom ring beam (3) for excavation between the pile top cap plate (4) and the retaining piles (2), a flow channel concrete structure (5) on top of the pile top cap plate (4), and a well shaft concrete structure (12) above the flow channel concrete structure (5).
2. The gate well structure located on a soft foundation as described in claim 1, characterized in that, The flow channel is provided with a gate slot bottom sill secondary concrete (9), the bottom surface of the gate slot bottom sill secondary concrete (9) is connected to the flow channel concrete structure (5), and the flow channel is also provided with gate slot side wall secondary concrete (10) on both sides, the top of the gate slot side wall secondary concrete (10) extends to the top of the well shaft concrete structure (12).
3. A gate well structure located on a soft foundation as described in claim 1, characterized in that, The inner wall of the concrete structure (5) of the flow channel is provided with a transition section of non-removable steel formwork (6).
4. A gate well structure located on a soft foundation as described in claim 1, characterized in that, Structural joints (7) are provided at the upstream and downstream of the channel. The structural joints (7) are located at the upper part of the channel concrete structure (5). PVC waterstops (8) are provided at both ends of the tunnel between the channel concrete structures (5).
5. A gate well structure located on a soft foundation as described in claim 1, characterized in that, The outer periphery of the well shaft concrete structure (12) is provided with a support ring beam (13).
6. A gate well structure located on a soft foundation as described in claim 1, characterized in that, A maintenance room is provided above the concrete structure (12) of the well shaft. The maintenance room includes a floor slab (15), side walls (16), and stairs (18).
7. A gate well structure located on a soft foundation as described in claim 6, characterized in that, The maintenance chamber is surrounded by backfill soil (20), and the maintenance chamber is equipped with an opening and closing platform (19) and an opening and closing machine (21) above it.
8. A gate well structure located on a soft foundation as described in claim 1, characterized in that, The flow channel concrete structure (5) and the well shaft concrete structure (12) are provided with ventilation hole steel pipes (14). One end of the ventilation hole steel pipe (14) is connected to the flow channel, and the other end of the ventilation hole steel pipe (14) extends upward to the outside and is connected to the outside air.
9. A gate well structure located on a soft foundation as described in claim 1, characterized in that, The cross-section of the well shaft concrete structure (12) is circular.
10. A gate well structure located on a soft foundation as described in claim 1, characterized in that, The cross-sectional shape of the middle section of the flow channel in the concrete structure (5) is rectangular, and the cross-sectional shape of the middle section of the flow channel gradually changes to a circle from the middle to both sides.