CN113605426A - A construction device suitable for dewatering of foundation pit in silty sand stratum - Google Patents
A construction device suitable for dewatering of foundation pit in silty sand stratum Download PDFInfo
- Publication number
- 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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- Prior art keywords
- foundation pit
- suction pipe
- pipe
- dewatering
- water
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- 239000004576 sand Substances 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000005086 pumping Methods 0.000 claims description 35
- 238000012544 monitoring process Methods 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 17
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 6
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
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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
-
- 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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- Engineering & Computer Science (AREA)
- 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
本发明涉及一种适用于粉细砂地层基坑降水的施工装置，属于土木工程技术领域。适用于粉细砂地层基坑降水的施工装置，其位于地基上布置支撑台、水箱；支撑台位于靠近基坑的基坑边缘，支撑台上设有射流泵及驱动电机，射流泵上设有气压表，射流泵的一端固接有吸水管道，射流泵的另一端通过出水管道与集水箱相连通；基坑内水平布设总抽水管，吸水管道与总抽水管相互连通，总抽水管与若干个竖向布设抽水管相互连通；抽水管管壁上设有进水孔；抽水管需深入基坑底面以下；注浆管位于基坑坑壁处，注浆管通过驱动电机控制注浆流量；所述的孔压计布置在抽水管上。本发明提供设置合理，利用射流泵进行排水，效果稳定。可以有效灵活地适应多方向的排水需求。
The invention relates to a construction device suitable for dewatering of silty sand stratum foundation pit, belonging to the technical field of civil engineering. A construction device suitable for foundation pit dewatering in silty sand stratum. It is arranged on the foundation with a support table and a water tank. The support table is located at the edge of the foundation pit near the foundation pit. The support table is provided with a jet pump and a drive motor. The jet pump is provided with Air pressure gauge, one end of the jet pump is fixed with a suction pipe, and the other end of the jet pump is connected with the water collecting tank through the water outlet pipe; a general suction pipe is horizontally arranged in the foundation pit, the suction pipe and the general suction pipe are connected to each other, and the general suction pipe is connected with several The suction pipes are arranged vertically to communicate with each other; there are water inlet holes on the wall of the suction pipes; the suction pipes need to go deep below the bottom of the foundation pit; The porosimeter described above is arranged on the suction pipe. The present invention provides reasonable setting, uses the jet pump for drainage, and has stable effect. It can effectively and flexibly adapt to the drainage needs of multiple directions.
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110857249.4A CN113605426A (en) | 2021-07-28 | 2021-07-28 | A construction device suitable for dewatering of foundation pit in silty sand stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110857249.4A CN113605426A (en) | 2021-07-28 | 2021-07-28 | A construction device suitable for dewatering of foundation pit in silty sand stratum |
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 | A construction device suitable for dewatering of foundation pit in silty sand stratum |
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 |