A shallow buried cave treatment structure

Abstract

The present invention provides a shallow buried cave treatment structure, including a concrete wall arranged on one side of the cave water body; an inverted siphon is passed through the bottom of the concrete wall, a drainage pipe is plugged into the middle, and an exhaust pipe is plugged into the top; a construction platform is provided on the top of the cave, and a plurality of backfill grouting pipes are passed through the construction platform, the inlet end of the backfill grouting pipe is leaking, and the outlet end is adjacent to the water body. The present invention can reasonably avoid the period of large-scale water inflow during the flood season without affecting the construction of foundation-related buildings. During the dry season, grouting and sealing of the cave are performed when there is no water or little water in the cave, which can ensure the sealing quality of the cave, and at the same time does not affect the construction of other buildings, achieving a good effect, and truly realizing the characteristics of "sequentiality, simplicity, and energy saving" of cave treatment.

Description

Technical Field

[0001] The invention relates to a shallow buried karst cave treatment structure, belonging to the technical field of karst cave filling. Background Art

[0002] At present, there are a variety of construction methods and engineering structures in the field of cave filling technology. How to fill the cave faster and more efficiently to avoid excessive impact on engineering buildings has become a very important task to be considered in foundation treatment projects in karst-developed areas.

[0003] In technical fields such as geotechnical engineering, during slope treatment and foundation excavation, in karst-developed areas, large caves that affect the safety of buildings or slopes must be backfilled, either with sand and gravel, or with concrete, or with cement mortar, etc. The quality of backfill is related to the safety of the project, so corresponding treatment plans must be formulated for caves in different situations.

[0004] For shallow caves with large amounts of water gushing out, the current treatment options are mainly to create a construction environment without groundwater through drainage, or to directly use underwater concrete pouring construction technology. However, both have very high requirements for the effect of drainage and the process of underwater construction, and the construction quality is difficult to guarantee.

[0005] In the prior art, Chinese patent application number 2012105775110 discloses a shallow cave filling construction method and a construction structure thereof, which includes the steps of prefabricating a grouting pipe, laying out a grouting pipe, filling a concrete-stone mixed filling material, grouting reinforcement, and completing the shallow cave filling construction. The construction structure includes a grouting pipe, a connecting pipe, a soil-stone mixed filling material layer filled in the shallow cave, and a grouting device located outside the shallow cave. The grouting pipe is laid out in the soil-stone mixed filling material layer, and a plurality of slurry outlets are arranged on the wall of the grouting pipe. A section of the grouting pipe is provided with a slurry inlet leading to the upper surface of the soil-stone mixed filling material layer. The slurry equipment is connected to the slurry inlet of the grouting pipe through a connecting pipe; like the present application, both can realize backfilling and grouting treatment of the cave, but the present application creates a water-free or low-water construction environment by discharging the accumulated water in the cave, and realizes gravity drainage and inverted siphon drainage, with significant energy-saving effect; secondly, the structure is simpler, easy to operate, and constructed in a time sequence, which is more reasonable and safe, and the quality is easy to ensure; finally, the self-compacting concrete enters the cave through the backfill grouting pipe, and under the action of gravity, the backfill is dense, and grouting treatment is carried out later through the backfill grouting pipe to achieve a dense combination of the backfill material and the cave rock wall. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a shallow buried cave treatment structure, which can reasonably avoid the period of large amount of water gushing during the flood season without affecting the construction of foundation-related buildings. In the dry season, grouting and sealing treatment is carried out when there is no water or little water in the cave, which can ensure the sealing quality of the cave without affecting the construction of other buildings, and has a good effect.

[0007] The present invention is achieved through the following technical solutions.

[0008] The present invention provides a shallow buried cave treatment structure, comprising a concrete wall arranged on one side of a cave water body; an inverted siphon pipe runs through the bottom of the concrete wall, a drainage pipe is plugged into the middle, and an exhaust pipe is plugged into the top; a construction platform is provided on the top of the cave, and a plurality of backfill grouting pipes are penetrated in the construction platform, wherein the inlet end of the backfill grouting pipe leaks outwards, and the outlet end is adjacent to the water body.

[0009] The water inlet of the inverted siphon is located in the water body, the water outlet is exposed, and a gate valve is arranged on the water outlet.

[0010] The exposed end is connected with a water supply pipe, and a check valve is arranged on the water supply pipe.

[0011] One end of the water supply pipe is communicated with the inverted siphon, and the other end is connected with a water pump.

[0012] The outlet ends of several backfill grouting pipes are arranged at different elevations.

[0013] A plurality of backfill grouting pipes are arranged parallel to each other.

[0014] The concrete wall, the inverted siphon and the drainage pipe are arranged parallel to each other.

[0015] The inverted siphon, the exhaust pipe and the drainage pipe are all communicated with the cave.

[0016] The beneficial effects of the present invention are: it can reasonably avoid the period of large-scale water gushing during the flood season without affecting the construction of foundation-related buildings. During the dry season, grouting and sealing of the cave can be carried out when there is no water or little water in the cave, which can ensure the sealing quality of the cave without affecting the construction of other buildings. It has a good effect and truly realizes the characteristics of "timing, simplicity, and energy saving" of cave treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] In the figure: 1-concrete wall, 2-inverted siphon, 3-drain pipe, 4-exhaust pipe, 5-backfill grouting pipe, 6-water supply pipe, 7-gate valve, 8-check valve, 9-water pump. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0020] like Figure 1 As shown, a shallow buried cave treatment structure includes a concrete wall 1 arranged on one side of the cave water body; an inverted siphon pipe 2 is inserted through the bottom of the concrete wall 1, a drainage pipe 3 is inserted in the middle, and an exhaust pipe 4 is inserted at the top; a construction platform is provided on the top of the cave, and a plurality of backfill grouting pipes 5 are inserted in the construction platform, the inlet end of the backfill grouting pipe 5 is exposed to the outside, and the outlet end is adjacent to the water body.

[0021] Preferably, the diameter or number of the drainage pipes 3 is adjusted according to the amount of water gushing out, and the exhaust pipe 4 is used to balance the pressure inside and outside the cave.

[0022] The water inlet of the inverted siphon 2 is located in the water body, the water outlet is exposed, and a gate valve 7 is provided on the water outlet.

[0023] Specifically, the inverted siphon 2 can discharge the water at the bottom of the cave.

[0024] The exposed end is connected with a water supply pipe 6 , and a check valve 8 is provided on the water supply pipe 6 .

[0025] One end of the water supply pipe 6 is connected to the inverted siphon 2 , and the other end is connected to a water pump 9 .

[0026] The outlet ends of several backfill grouting pipes 5 are arranged at different elevations. The pipes are made of steel pipes and are drilled into the cave from the construction platform at the top of the cave.

[0027] A plurality of backfill grouting pipes 5 are arranged parallel to each other.

[0028] The concrete wall 1, the inverted siphon 2 and the drainage pipe 3 are arranged parallel to each other.

[0029] The inverted siphon 2, the exhaust pipe 4 and the drainage pipe 3 are all connected to the cave.

[0030] Preferably, the grade of the concrete wall 1 is not lower than the grade of the adjacent structural concrete.

[0031] Furthermore, during construction in the flood season, the gate valve 7 is closed and the water in the cave overflows through the drain pipe 3; during the dry season, the gate valve 7 is closed and the water pump 9 is started to fill the inverted siphon 2 with water, and then the water pump 9 is closed and the gate valve 7 is opened to allow the water in the inverted siphon 2 to drain, causing the inverted siphon to generate sufficient negative pressure to discharge the bottom water in the cave.

[0032] Furthermore, the cave is backfilled in sequence through the backfill grouting pipe 5 until a stable and continuous slurry flows out of the exhaust pipe 4, and the backfilling is completed.

[0033] In summary, the beneficial effects of the present invention are as follows:

[0034] (1) Timing

[0035] Draining during the flood season and backfilling during the dry season will not affect the construction of adjacent buildings, but will also create conditions to backfill the caves densely. Through the reasonable arrangement of the construction sequence, it will achieve very good results.

[0036] (2) Simplicity

[0037] The structure of the present invention can realize free drainage and cave backfilling mainly through the reasonable arrangement of concrete retaining walls, drainage pipes, exhaust pipes and grouting pipes, etc., and has simple construction technology, strong operability and easy control.

[0038] (3) Energy saving

[0039] The drainage in the structure of the present invention uses only a small amount of electricity to drive the water pump during the dry season. The backfill grouting pipe should be able to serve as a chute to transport the backfill concrete into the cave. In the later stage, it can be used as a channel for backfill grouting to fill the entire cave densely, thereby truly achieving energy-saving effects.

Claims

1. A shallow buried cave treatment structure, comprising a concrete wall (1) arranged on one side of a cave water body, characterized in that: An inverted siphon pipe (2) is inserted through the bottom of the concrete wall (1), a drainage pipe (3) is inserted in the middle, and an exhaust pipe (4) is inserted at the top; a construction platform is provided at the top of the cave, and a plurality of backfill grouting pipes (5) are inserted through the construction platform, the inlet end of the backfill grouting pipe (5) is exposed to the outside, and the outlet end is adjacent to the water body.

2. The shallow cave treatment structure according to claim 1, characterized in that: The water inlet of the inverted siphon (2) is located in the water body, the water outlet is exposed, and a gate valve (7) is provided on the water outlet.

3. The shallow cave treatment structure according to claim 2, characterized in that: The exposed end of the inverted siphon pipe (2) is connected to a water supply pipe (6), and a check valve (8) is provided on the water supply pipe (6).

4. The shallow cave treatment structure according to claim 3, characterized in that: One end of the water supply pipe (6) is in communication with the inverted siphon pipe (2), and the other end is connected to a water pump (9).

5. The shallow cave treatment structure according to claim 1, characterized in that: The outlet ends of the plurality of backfill grouting pipes (5) are arranged at different elevations.

6. The shallow cave treatment structure according to claim 1, characterized in that: A plurality of backfill grouting pipes (5) are arranged parallel to each other.

7. The shallow cave treatment structure according to claim 1, characterized in that: The concrete wall (1), the inverted siphon (2) and the drainage pipe (3) are arranged parallel to each other.

8. The shallow cave treatment structure according to claim 1, characterized in that: The inverted siphon (2), the exhaust pipe (4) and the drainage pipe (3) are all connected to the cave.

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