CN111005360B - Automatic drainage anti-liquefaction rigid pile with controllable flow speed - Google Patents
Automatic drainage anti-liquefaction rigid pile with controllable flow speed Download PDFInfo
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- CN111005360B CN111005360B CN201911299915.6A CN201911299915A CN111005360B CN 111005360 B CN111005360 B CN 111005360B CN 201911299915 A CN201911299915 A CN 201911299915A CN 111005360 B CN111005360 B CN 111005360B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an automatic drainage anti-liquefaction rigid pile with controllable flow velocity, which comprises a precast pile, wherein a groove is formed in the side surface of the precast pile, a steel plate is fixed on the opening side of the groove, a plurality of water permeable holes are formed in the surface of the steel plate, a communication device is arranged in the groove and comprises insulating plastic, the insulating plastic is fixed on the inner side wall of the groove, a dynamic pore water pressure sensor is arranged in the insulating plastic, a metal conductor is arranged at the protrusion of the insulating plastic, the metal conductor and the dynamic pore water pressure sensor are respectively connected with a control circuit, the control circuit is connected with a water pump, and the water pump is connected with a water pumping pipe in the groove. The invention can quickly pump out pore water which is poured into the drainage body from the soil body, quickens the dissipation rate of the pressure of the excess pore water in the soil body, and the pump is driven by the storage battery to automatically start and close the water pumping, thereby avoiding manual switching and maintenance, lightening the work load, changing the power of the pump along with the change of the pressure of the pore water and more reasonably utilizing energy.
Description
Technical Field
The invention relates to an anti-liquefaction rigid pile, in particular to an automatic drainage anti-liquefaction rigid pile with controllable flow rate.
Background
Hyperstatic pore water pressure is generated in the sandy soil foundation under the action of earthquake, and the hyperstatic pore water pressure cannot be quickly dissipated, so that the foundation is liquefied and damaged. Application documents such as application number 200520076660.4 have disclosed rigid drainage pile, because seismic action produces the excess pore pressure in the soil body in the stake of current rigid drainage, superpressure pore water passes through drainage body discharge earth's surface, and the earth's surface needs to arrange the great soil layers of osmotic coefficient such as sand soil layer, gravel layer and makes the pore water loss, and the construction is comparatively troublesome, and the pore water loss efficiency is not high.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an automatic drainage liquefaction-resistant rigid pile capable of accelerating the dissipation rate of excess pore water pressure in a soil body and controlling the flow speed.
The technical scheme is as follows: the invention comprises a precast pile, wherein a groove is arranged on the side surface of the precast pile, the groove is an open groove, a steel plate is fixed on the open side of the groove, a plurality of water permeable holes are formed in the surface of the steel plate, a communication device is arranged in the groove, the communication device comprises insulating plastic, the insulating plastic is fixed on the inner side wall of the groove, a dynamic pore water pressure sensor is arranged in the insulating plastic, a metal conductor is arranged at the protrusion of the insulating plastic, the metal conductor and the dynamic pore water pressure sensor are respectively connected with a control circuit, the control circuit is connected with a water pump, and the water pump is connected with a water pumping pipe in the groove.
The steel sheet fix on the precast pile through a plurality of billet, prevent to drop.
The steel sheet inboard arranged geotechnological cloth, prevent that underground soil granule from getting into the recess.
The metal conductor and the dynamic pore water pressure sensor are respectively connected with the control circuit through cables.
The water pump is internally provided with a storage battery, and can automatically start and close water pumping, so that manual switching and maintenance are omitted, and the workload is lightened.
The suction pipe lower extreme stretch into the recess bottom, drive the suction pipe through the suction pump and will gush into the pore water in the drainage body and take out fast.
The working principle is as follows: the invention utilizes the rising of pore water pressure during the liquefaction of earthquake to lead the water level entering the inner groove of the pile to rise, when the water level rises to the communication device formed by the metal conductor and the insulating plastic, the water has conductive property, thus leading the circuit of the water pump to form a passage and leading the pump to start working. When the pressure of the water in the excess pore is reduced and the water level falls back to the lower part of the communication device, the circuit of the water pump is broken and the pump stops working.
Has the advantages that: the invention can quickly pump out pore water which is poured into the drainage body from the soil body, quickens the dissipation rate of the pressure of the excess pore water in the soil body, and the pump is driven by the storage battery and can automatically start or close the water pumping along with the change of the water level, thereby avoiding manual switching and maintenance, lightening the work load, changing the power of the pump along with the change of the pressure of the pore water and more reasonably utilizing energy.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 and 2, the invention comprises a reinforced concrete precast pile 1, wherein a vertical groove 2 is formed in the side surface of the reinforced concrete precast pile 1, the groove 2 is an open groove, a steel plate 3 is fixed on the open side, and the groove 2 and the steel plate 3 form a water storage space. The steel sheet 3 is fixed on reinforced concrete precast pile 1 through a plurality of billet 5 along the vertical interval evenly distributed of reinforced concrete precast pile 1, prevents that it from droing. A plurality of water permeable holes 4 are uniformly arranged on the surface of the steel plate 3, and groundwater enters the groove 2 through the water permeable holes 4. Geotextile 8 is arranged on the inner side of the steel plate 3, and the geotextile 8 is used as a filter, so that most of underground soil particles can be filtered, and the soil particles are prevented from entering the groove 2.
The groove 2 is internally provided with an automatic power supply communication device which comprises insulating plastic 9, a metal conductor 10, a cable 7 and a dynamic pore water pressure sensor 13, wherein the insulating plastic 9 is fixed on two opposite inner side walls of the groove 2, the insulating plastic 9 is L-shaped, the metal conductor 10 is connected at the protruding part of the insulating plastic 9, and the dynamic pore water pressure sensor 13 is arranged in the insulating plastic 9. The position of the communication device can be adaptively adjusted according to the stratum condition, and the water suction pump 6 can be started when the underground water level is at the same horizontal line. The metal conductor 10 and the dynamic pore water pressure sensor 13 are respectively connected with a cable 7, and the cable 7 is led out of the groove 2 and connected with a control circuit 12. The control circuit 12 is connected with the water suction pump 6, the water suction pipe 11 is placed in the groove 2, the lower end of the water suction pipe 11 extends into the bottom of the groove 2, the upper portion of the water suction pipe 11 is connected to the water suction pump 6, a storage battery is arranged in the water suction pump 6 and can automatically start or stop water suction along with water level change, manual switching and maintenance are omitted, and work load is relieved.
According to the invention, when the pore water pressure rises during earthquake liquefaction, the water level entering the groove 2 in the pile rises, when the water level rises to the elevation of the metal conductor 10, as the water has conductivity, the communication device is in circuit communication, the control circuit 12 forms a passage, the water suction pump 6 starts to work, the excess pore water in the groove 2 is pumped out of the ground surface through the water suction pipe 11, meanwhile, the dynamic pore water pressure sensor 13 detects the rising pore water pressure, the pore water pressure data is transmitted to the control circuit 12 through the cable 7, the power of the water suction pump 6 is regulated and controlled according to the pore water pressure, when the pore water pressure exceeds the hydrostatic pressure, the control circuit 12 increases the power of the water suction pump 6, and when the pore water pressure falls, the control circuit 12 reduces the power of the water suction pump 6, so that the electric energy is utilized more reasonably. When the water level falls to the lower part of the communicating device after the pressure of the water in the excess pore is reduced, the circuit of the water suction pump 6 is broken, and the pump stops working, so that the effect of automatically and quickly weakening the water pressure in the excess pore is realized, and the normal use of the pile foundation is ensured.
The application process of the invention comprises the following steps:
1) finding out the distribution of liquefied soil layers in an application area, and determining the specific size of each rigid pile according to the depth distribution of the liquefied soil layers;
2) a rigid pile body with a groove is prefabricated in a factory, the groove is positioned on one side of the rectangular rigid pile, and the size of the groove is matched with the side length of the rigid pile;
3) transporting the prefabricated rigid pile to an application site, and installing a water pumping pipe with the size matched with that of the groove;
4) adjusting and fixing the position of the communication device in each rigid pile groove according to the stratum condition, so that the communication devices are kept on the same target horizontal line after the pile body is driven into the ground;
5) assembling the steel plate and the geotextile with uniformly punched water permeable holes, wherein the sizes of the steel plate and the geotextile are consistent with those of the grooves, and the steel plate on the side without the geotextile is arranged on the outward side of the groove of the rigid pile;
6) and (3) driving a plurality of automatic drainage anti-liquefaction rigid piles into target soil layers which are easy to liquefy and have different depths through equipment such as a pile driver and the like according to geological exploration data.
Claims (4)
1. An automatic drainage anti-liquefaction rigid pile with controllable flow velocity comprises a precast pile, wherein a groove is formed in the side face of the precast pile, the groove is an open groove, and the pile is characterized in that a steel plate is fixed on the opening side of the groove, a water storage space is formed by the groove and the steel plate, a plurality of water permeable holes are formed in the surface of the steel plate, underground water enters the groove through the water permeable holes, a communication device is arranged in the groove and comprises insulating plastic, the insulating plastic is fixed on the inner side wall of the groove and is L-shaped, a dynamic pore water pressure sensor is arranged in the insulating plastic, a metal conductor is arranged at a protrusion of the insulating plastic, the position of the communication device is adjusted according to stratum conditions, a water suction pump can be started when the underground water level is at the same horizontal line, and the metal conductor and the dynamic pore water pressure sensor are respectively connected with a control, control circuit be connected with the suction pump, the suction pump be connected with the drinking-water pipe in the recess, the suction pump in be equipped with the battery, can change the automatic start or close drawing water along with the water level, the drinking-water pipe lower extreme stretch into the recess bottom.
2. The flow rate controlled rigid pile with automatic drainage and liquefaction resistance as claimed in claim 1, wherein the steel plate is fixed to the prefabricated pile by a plurality of steel bars.
3. The flow rate controllable automatic drainage liquefaction resistant rigid pile according to claim 1 or 2, characterized in that geotextile is arranged inside the steel plate.
4. The automatic drainage and liquefaction-resistant pile of claim 1, wherein the metal conductor and the dynamic pore water pressure sensor are connected to the control circuit via cables, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299915.6A CN111005360B (en) | 2019-12-17 | 2019-12-17 | Automatic drainage anti-liquefaction rigid pile with controllable flow speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299915.6A CN111005360B (en) | 2019-12-17 | 2019-12-17 | Automatic drainage anti-liquefaction rigid pile with controllable flow speed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111005360A CN111005360A (en) | 2020-04-14 |
| CN111005360B true CN111005360B (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911299915.6A Active CN111005360B (en) | 2019-12-17 | 2019-12-17 | Automatic drainage anti-liquefaction rigid pile with controllable flow speed |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561972A (en) * | 2022-02-28 | 2022-05-31 | 广州大学 | Intelligent protection system and method for liquefiable site bridge pile foundation |
| CN115324044B (en) * | 2022-08-11 | 2024-03-15 | 山东电力工程咨询院有限公司 | Anti-liquefaction drainage pipe pile connecting device and construction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015029054A1 (en) * | 2013-08-27 | 2015-03-05 | Naresh Kumar | Slotted holes meshed plug steel pile |
| CN105525608A (en) * | 2016-01-29 | 2016-04-27 | 中国石油大学(华东) | Liquefaction-resisting prefabricated concrete square drainage pile |
| CN110424416B (en) * | 2019-07-25 | 2021-08-24 | 宁夏大学 | Electromagnetic drainage slide-resistant pile and construction method thereof |
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