CN113605426A - Construction equipment suitable for silty and fine sand stratum foundation pit dewatering - Google Patents
Construction equipment suitable for silty and fine sand stratum foundation pit dewatering Download PDFInfo
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- CN113605426A CN113605426A CN202110857249.4A CN202110857249A CN113605426A CN 113605426 A CN113605426 A CN 113605426A CN 202110857249 A CN202110857249 A CN 202110857249A CN 113605426 A CN113605426 A CN 113605426A
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- foundation pit
- water
- pumping pipe
- water pumping
- jet pump
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a construction device suitable for foundation pit dewatering in a silty-fine sand stratum, and belongs to the technical field of civil engineering. The construction device is suitable for foundation pit dewatering in the fine sand stratum, and a supporting table and a water tank are arranged on a foundation; the supporting platform is positioned at the edge of the foundation pit close to the foundation pit, the supporting platform is provided with a jet pump and a driving motor, the jet pump is provided with a barometer, one end of the jet pump is fixedly connected with a water suction pipeline, and the other end of the jet pump is communicated with the water collecting tank through a water outlet pipeline; a main water pumping pipe is horizontally arranged in the foundation pit, the water suction pipeline is communicated with the main water pumping pipe, and the main water pumping pipe is communicated with a plurality of vertically arranged water pumping pipes; the wall of the pumping pipe is provided with a water inlet hole; the water pumping pipe needs to go deep below the bottom surface of the foundation pit; the grouting pipe is positioned on the pit wall of the foundation pit and controls grouting flow through the driving motor; the pore pressure meter is arranged on the water pumping pipe. The invention has reasonable arrangement, utilizes the jet pump to drain water and has stable effect. Can effectively and flexibly adapt to the multi-directional drainage requirement.
Description
Technical Field
The invention relates to a construction device suitable for foundation pit dewatering in a silty-fine sand stratum, and belongs to the technical field of civil engineering.
Background
Precipitation is the important condition of foundation ditch excavation, its aim at: the water level of the foundation pit is controlled to be 1.0m below the bottom plate of the foundation pit, so that the water content of the soil body in the pit is reduced, an excavator and workers can conveniently construct and operate in the pit, the stability of a side slope of the soil body in the pit is facilitated, and the landslide of the soil body in the pit is prevented; 2) the bottom of the foundation pit is prevented from surging, and the stability of the foundation pit bottom plate during construction is ensured; 3) through scientific precipitation control, the surface settlement caused by precipitation is reduced as much as possible, and the influence of foundation pit precipitation on the surrounding environment is reduced.
The silty-fine sand stratum is loose in geology and rich in water, and particularly needs to pay attention to the influence of stratum rainfall on the surrounding environment in the foundation pit construction of the water-rich silty-fine sand stratum.
The existing precipitation device has the defects of poor sealing, large vibration and the like, and meanwhile, in the foundation pit precipitation example of a water-rich fine sand stratum, the instability problem caused by the leakage of a foundation pit support structure and the like occurs, and the combination of precipitation with the aspects of monitoring, emergency rescue and the like is also a problem worthy of thinking.
Disclosure of Invention
In order to achieve the technical purpose, the invention provides a construction device suitable for foundation pit dewatering in a silty-fine sand stratum aiming at the defects of the prior art. Through the additional arrangement of material parts such as sealing rings, geotextile and the like, the sealing performance and the safety of the device are better guaranteed. Meanwhile, a monitoring and prepared grouting system is additionally arranged in the device, so that problems can be found in time to react, and the safety guarantee degree of precipitation construction is improved.
The invention adopts the following technical scheme:
the invention relates to a construction device suitable for foundation pit dewatering of a silty-fine sand stratum, which comprises a supporting table, a driving motor, a water suction pipe, a water outlet pipe, a water collecting tank, a main water pumping pipe, a jet pump, a barometer, a grouting pipe and a hole pressure meter, wherein the supporting table is arranged on the supporting table; a support platform and a water tank are arranged on the foundation; the supporting platform is positioned at the edge of the foundation pit close to the foundation pit, the supporting platform is provided with a jet pump and a driving motor, the jet pump is provided with a barometer, one end of the jet pump is fixedly connected with a water suction pipeline, and the other end of the jet pump is communicated with the water collecting tank through a water outlet pipeline; a main water pumping pipe is horizontally arranged in the foundation pit, the water suction pipeline is communicated with the main water pumping pipe, and the main water pumping pipe is communicated with a plurality of vertically arranged water pumping pipes; the wall of the pumping pipe is provided with a water inlet hole; the water pumping pipe needs to go deep below the bottom surface of the foundation pit; the grouting pipe is positioned on the pit wall of the foundation pit and controls grouting flow through the driving motor; the pore pressure meter is arranged on the water pumping pipe.
According to the construction device suitable for foundation pit dewatering in the silty-fine sand stratum, the pore pressure gauge is arranged on the water pumping pipe adjacent to the edge of the foundation pit and used for monitoring the pore pressure in the range near the side wall of the foundation pit.
The construction device suitable for foundation pit dewatering in the fine sand stratum also comprises an automatic monitoring alarm device, wherein the automatic monitoring alarm device is arranged on the driving motor and is connected with the hole pressure gauge, and the automatic monitoring alarm device receives a monitoring signal of the hole pressure gauge so as to control the grouting flow of the driving motor or stop grouting. Measures such as grouting and the like can be quickly adopted when the leakage of the side wall of the foundation pit is found to possibly exist so as to ensure the construction safety of the engineering;
the pore pressure meter is arranged on the water pumping pipe adjacent to the edge of the foundation pit and used for monitoring whether pore pressure near the side wall of the foundation pit is abnormal or not; the automatic monitoring alarm device is connected with a pore pressure gauge signal and arranged on the support table, can display the signal indication number of each pore pressure measuring point, and can judge whether to trigger an alarm according to the set alarm value so as to determine whether to take measures such as grouting and the like.
According to the construction device suitable for foundation pit dewatering in the silty-fine sand stratum, the shock absorber is arranged in the support table, so that shock can be relieved, and the service life of components such as the jet pump can be prolonged.
According to the construction device suitable for foundation pit dewatering in the silty-fine sand stratum, the water inlet hole of the water pumping pipe is wrapped with the geotextile. The geotextile can prevent fine sand from permeating and can also play a role in protecting cutting and puncturing of possibly existing gravel under the hydraulic action.
Has the advantages that:
the construction device suitable for foundation pit dewatering in the silty-fine sand stratum is reasonable in arrangement, utilizes the jet pump to drain water, and is stable in effect.
The construction device suitable for foundation pit dewatering in the silty-fine sand stratum provided by the invention can effectively and flexibly adapt to the multi-directional drainage requirement by utilizing the graded arrangement of the main water pumping pipe and the water pumping pipe.
According to the construction device suitable for foundation pit dewatering in the silty-fine sand stratum, the sealing ring is additionally arranged at each connecting part of the device, and the sealing performance and effectiveness of the device are improved.
According to the construction device suitable for foundation pit dewatering in the fine sand stratum, the geotextile is wrapped at the water inlet of the device, so that fine sand can be effectively prevented from entering the water pumping pipe to block the pipeline, the protection effect on the puncture and cutting of the possibly existing gravel under the hydraulic action is realized, and the durability of the device is improved.
The construction device suitable for foundation pit dewatering in the fine sand stratum and provided with the hole pressure monitoring device can be used for observing whether abnormity exists or not in real time.
The construction device suitable for foundation pit dewatering in the silty-fine sand stratum and the grouting pipe additionally arranged on the device can timely react when abnormality is found, so that construction safety is guaranteed, meanwhile, the automation level is quite high, and construction convenience is improved.
Drawings
FIG. 1 is a schematic structural diagram of a construction device suitable for foundation pit dewatering in a silty-fine sand stratum provided by the invention;
in the figure, 1-foundation, 2-foundation pit, 3-supporting table, 4-shock absorber, 5-driving motor, 6-water suction pipe, 7-water outlet pipe, 8-water collecting tank, 9-total water pumping pipe, 10-water pumping pipe, 11-jet pump, 12-barometer, 13-grouting pipe, 14-pore pressure meter and 15-automatic monitoring alarm device.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
In the following, the present invention will be described more specifically by way of example with reference to the accompanying drawings. It is to be expressly noted that the drawings are designed as a simplified illustration and not as a definition of the limits of the invention.
As shown in fig. 1: this embodiment provides a construction equipment suitable for silty and fine sand stratum foundation pit dewatering, includes: the device comprises a foundation 1, a foundation pit 2, a support table 3, a shock absorber 4, a driving motor 5, a water suction pipe 6, a water outlet pipe 7, a water collecting tank 8, a total water pumping pipe 9, a water pumping pipe 10, a jet pump 11, a barometer 12, a grouting pipe 13, a pore pressure meter 14 and an automatic monitoring alarm device 15;
the foundation 1, the foundation pit 2, the support table 3, the water pumping pipe 10 and the jet pump 11 form a main body structure of the device;
foundation 1 surface rigid coupling has brace table 3 and header tank 8, brace table 3 is more close to foundation ditch 3 edge than header tank 8, and brace table 3 is roughly perpendicular alternately with foundation ditch 2 edge with header tank 8 connecting wire direction, brace table 3's top rigid coupling has jet pump 11, jet pump 11 direction is also perpendicular with foundation ditch 12 edge, and the rigid coupling has barometer 12 on the jet pump 11, jet pump 11 is close to 2 marginal one ends rigid couplings in foundation ditch 6, and jet pump 11 keeps away from the one end rigid coupling at 2 edges in foundation ditch 7, this outlet conduit 7 finally links into header tank 8, brace table 3's inside is provided with bumper shock absorber 4, the existence of bumper shock absorber can effectively alleviate the vibrations of brace table at the during operation, prolong above that each part especially jet pump's life.
The main water pumping pipe 9 is laid in the pre-excavated foundation pit 2 and is connected with the jet pump 11 through the water suction pipe 6, and a bayonet matched with the water pumping pipe 10 in size is arranged on the main water pumping pipe 9 for facilitating connection; a sealing ring is arranged at the joint of the water pumping pipe 10 and the main water pumping pipe 9 to meet the sealing requirement, and a water inlet hole is formed in the water pumping pipe 10; the water inlet of the water pumping pipe 10 is wrapped with geotextile to prevent fine sand from entering the water pumping pipe to block the pipeline, and the water pumping pipe can puncture and cut the possibly existing gravel under the hydraulic action to play a protective role.
The driving motor 5 is fixedly connected to the support table 3, and the grouting pipe 13 is arranged close to the side wall of the foundation pit 2 and controlled by the driving motor 5; the pore pressure meter 14 is only arranged on the water pumping pipe 10 adjacent to the edge of the foundation pit 2 (the water pumping pipe in the middle of the foundation pit does not need to be arranged), and is used for monitoring the pore pressure near the side wall of the foundation pit 2; the automatic monitoring alarm device 15 is connected with a pore pressure gauge signal and arranged on the support table 3, can display the signal indication number of each pore pressure gauge and can set an alarm value according to the actual engineering requirement; and when the pore pressure change at the side wall of the foundation pit exceeds an alarm value, an alarm is triggered, the system automatically suspends pumping water and takes measures such as grouting, and after the pore pressure is recovered to be normal, emergency treatment measures such as grouting are stopped and pumping is recovered.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a construction equipment suitable for silty and thin sand stratum foundation ditch precipitation which characterized in that: the device comprises a supporting table, a driving motor, a water suction pipe, a water outlet pipe, a water collecting tank, a main water pumping pipe, a jet pump, a barometer, a grouting pipe and a pore pressure meter; a support platform and a water tank are arranged on the foundation; the supporting platform is positioned at the edge of the foundation pit close to the foundation pit, the supporting platform is provided with a jet pump and a driving motor, the jet pump is provided with a barometer, one end of the jet pump is fixedly connected with a water suction pipeline, and the other end of the jet pump is communicated with the water collecting tank through a water outlet pipeline; a main water pumping pipe is horizontally arranged in the foundation pit, the water suction pipeline is communicated with the main water pumping pipe, and the main water pumping pipe is communicated with a plurality of vertically arranged water pumping pipes; the wall of the pumping pipe is provided with a water inlet hole; the water pumping pipe needs to go deep below the bottom surface of the foundation pit; the grouting pipe is positioned on the pit wall of the foundation pit and controls grouting flow through the driving motor; the pore pressure meter is arranged on the water pumping pipe.
2. The construction device suitable for silty-fine sand stratum foundation pit dewatering of claim 1, characterized in that: the pore pressure meter is arranged on the water pumping pipe adjacent to the edge of the foundation pit and used for monitoring the pore pressure in the range near the side wall of the foundation pit.
3. The construction device suitable for silty-fine sand stratum foundation pit dewatering of claim 2, characterized in that: the automatic monitoring and alarming device is arranged on the driving motor and connected with the pore pressure meter, and receives a monitoring signal of the pore pressure meter so as to control the driving motor to start grouting or stop grouting at proper flow when necessary.
4. The construction device suitable for silty-fine sand stratum foundation pit dewatering of claim 1, characterized in that: a shock absorber is arranged in the supporting platform.
5. The construction device suitable for silty-fine sand stratum foundation pit dewatering of claim 1, characterized in that: and the water inlet hole of the water pumping pipe is wrapped with geotextile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110857249.4A CN113605426A (en) | 2021-07-28 | 2021-07-28 | Construction equipment suitable for silty and fine sand stratum foundation pit dewatering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110857249.4A CN113605426A (en) | 2021-07-28 | 2021-07-28 | Construction equipment suitable for silty and fine sand stratum foundation pit dewatering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113605426A true CN113605426A (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110857249.4A Pending CN113605426A (en) | 2021-07-28 | 2021-07-28 | Construction equipment suitable for silty and fine sand stratum foundation pit dewatering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113605426A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB966167A (en) * | 1963-04-11 | 1964-08-06 | C H Johnson Machinery Ltd | Improvements relating to de-watering the ground |
| CN112502175A (en) * | 2020-12-17 | 2021-03-16 | 中铁二十二局集团轨道工程有限公司 | Construction device capable of lowering water level in foundation pit of red sandstone stratum |
| CN112709248A (en) * | 2020-12-18 | 2021-04-27 | 山东大学 | Grouting system and process suitable for high slope curtain grouting stability control |
-
2021
- 2021-07-28 CN CN202110857249.4A patent/CN113605426A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB966167A (en) * | 1963-04-11 | 1964-08-06 | C H Johnson Machinery Ltd | Improvements relating to de-watering the ground |
| CN112502175A (en) * | 2020-12-17 | 2021-03-16 | 中铁二十二局集团轨道工程有限公司 | Construction device capable of lowering water level in foundation pit of red sandstone stratum |
| CN112709248A (en) * | 2020-12-18 | 2021-04-27 | 山东大学 | Grouting system and process suitable for high slope curtain grouting stability control |
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Application publication date: 20211105 |
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| RJ01 | Rejection of invention patent application after publication |