CN113565103A - Inner supporting structure for foundation pit - Google Patents
Inner supporting structure for foundation pit Download PDFInfo
- Publication number
- CN113565103A CN113565103A CN202110797096.9A CN202110797096A CN113565103A CN 113565103 A CN113565103 A CN 113565103A CN 202110797096 A CN202110797096 A CN 202110797096A CN 113565103 A CN113565103 A CN 113565103A
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- Prior art keywords
- box
- pipe
- supporting
- liquid outlet
- driving
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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
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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
Abstract
The invention discloses an inner supporting structure of a foundation pit, which comprises a supporting box, wherein the supporting box is embedded in the ground, a plurality of liquid outlet holes are formed in the middle of the supporting box, the liquid outlet holes are formed in four inner walls of the supporting box, each liquid outlet hole is hermetically connected with one liquid outlet pipe, the liquid outlet pipes are jointly communicated with a driving box, the driving box is in an annular structure, the supporting box is located on the inner side portion of the driving box, the driving box is connected with a driving structure, the bottom of the supporting box is provided with a plurality of inclined rods, the inclined rods are arranged in an annular array mode by taking the axis in the supporting box as a polar axis, and the inclined rods are connected with an auxiliary supporting structure. Has the advantages that: the invention realizes the shielding effect on the foundation pit through the self-inflating work of the inflatable air bag in the rain weather, prevents a large amount of rain from flowing in, and performs self-detection and increases the flow speed of the rain when the amount of rain is large.
Description
Technical Field
The invention relates to the technical field of foundation pit supporting, in particular to an inner supporting structure of a foundation pit.
Background
The foundation pit is a soil pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. Before excavation, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site, and waterproof drainage work is performed. The persons with low excavation depth can use the method of putting side slope to make the earth slope stable, and the size of the slope is determined according to the relevant construction project. When a deeper and adjacent building is excavated, a foundation pit wall supporting method and a concrete spraying wall protecting method can be used.
Chinese publication No. CN112482391A discloses a foundation pit supporting structure, which comprises a supporting plate, wherein the upper end of the supporting plate is fixedly connected with a partition plate matched with the supporting plate, the upper end of the supporting plate is fixedly connected with a circular truncated cone-shaped guide plate, the inclined inner wall of the guide plate is provided with a plurality of guide grooves, the side wall of the guide plate is fixedly connected with a box body, the inner wall of the box body is fixedly connected with a driving mechanism, a lifting plate is arranged in the box body below the driving mechanism in a sliding and sealing manner, the upper end of the lifting plate is fixedly connected with a vertical rod, the upper end of the vertical rod is abutted and contacted with the driving mechanism, the inner wall of the box body is fixedly connected with a reset mechanism, the lower end of the reset mechanism is fixedly connected with the upper end of the lifting plate, the side wall of the box body below the lifting plate is communicated with a drainage mechanism, the bottom of the box body is communicated with a water absorption mechanism, and the analysis shows that although the prior art can partially solve the problem of collecting rainwater flowing to the side of the ground of the foundation pit, the internal energy effectively reduces the collection amount of rainwater at the bottom of the foundation pit, reduces the effect of the rainwater on soaking the foundation pit, but in actual use, the rainwater cannot be well prevented from entering the foundation pit under the condition of overlarge rainwater, so that the drainage pressure of the foundation pit is increased in the state, the load for supporting the foundation pit is increased, and the long-term use is not facilitated.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, when rainwater is large, the drainage pressure of a foundation pit is large, the load of a supporting foundation pit is increased, and long-term use is not facilitated.
The utility model provides an inner supporting structure of foundation ditch, includes supporting box, supporting box inlays to be established in ground and lie in middle part height department and seted up a plurality of liquid holes, and is a plurality of go out the liquid hole setting on four inner walls of supporting box and every goes out the equal sealing connection in liquid hole and has a drain pipe, and is a plurality of the common intercommunication of drain pipe is provided with the drive case, drive case position annular structure and the supporting box lie in the inside part of drive case, be connected with drive structure in the drive case, the bottom of supporting box is provided with a plurality of down tube, and is a plurality of the down tube sets up as polar axis annular array with the axis in the supporting box, the down tube is connected with supplementary bearing structure.
At foretell bearing structure in the foundation ditch, drive structure includes the movable block of sealed sliding connection in the drive box, the drain pipe is located the upside of movable block with the junction of drive box, a plurality of connecting rods of top fixedly connected with of movable block, every a spring, every have all been cup jointed in the outside of connecting rod the bottom of spring all with the up end fixed connection of movable block, every the top of spring all with the interior roof fixed connection of drive box, the drive box is located the below of movable block and has been seted up apopore and sealing connection has the fluid-discharge tube, the other end and the external blow off pipe intercommunication of fluid-discharge tube.
In foretell foundation ditch inner supporting structure, every the top of connecting rod all runs through the roof of drive case and the intercommunication has the atmospheric pressure case of setting in ground, every equal sealing sliding connection has a piston block in the atmospheric pressure case, every the atmospheric pressure passageway has all been run through in the piston block to have seted up, every the atmospheric pressure passageway has a first check valve with the upside junction sealing connection who corresponds the piston block, first check valve allows gaseous upside from the atmospheric pressure passageway to flow into the downside, the inlet port has been run through at the top of atmospheric pressure case, sealing connection has the intake pipe in the inlet port, the top of intake pipe stretches out ground and link up with the external world.
At foretell support structure in the foundation ditch, the lateral wall sealing connection that the pneumatic chamber is located piston block below has the gas tube, the other end intercommunication of gas tube has the bin of setting in the ground, the bottom fixedly connected with inflation airbag of bin, inflation airbag is umbrella-type structure under being in the inflation state, the top seal of bin rotates and is connected with the commentaries on classics board, the rotation junction of commentaries on classics board and bin is provided with the torsional spring.
In the above foundation pit support structure, a second one-way valve is hermetically connected at a joint of the inflation tube and the air pressure tank, a specified flow direction of the second one-way valve is the same as that of the first one-way valve, and one end of the air inlet tube outside the ground is of a bent tube structure and the bending direction of the air inlet tube faces the ground.
In the above-mentioned foundation pit inner support structure, the auxiliary support structure includes the tributary pipe with fluid-discharge tube sealing connection, the other end of tributary pipe communicates to the down tube, and the bottom of a plurality of down tubes is connected with a pressure boost pipe jointly, and the cavity has all been seted up to the inside of every down tube, the other end of tributary pipe and the interior cavity intercommunication of down tube.
At foretell support structure in foundation ditch, the interior diapire fixedly connected with conductor layer of pneumatic box, terminal surface sets up to metallic conductor material under the piston piece, the conductor layer electricity is connected with the suction pump, the suction pump sets up the junction at fluid-discharge tube and branch flow tube, the lower terminal surface and the external power electricity of piston piece are connected, make and work as the suction pump is supplied power work when piston piece and conductor layer contact.
Compared with the prior art, the invention has the advantages that:
1: through a plurality of liquid holes and the drain pipe that sets up can be with the more even discharge of rainwater in the supporting box to make it remove to the driving box in, and the movable block that sets up in the driving box can move down under the combined action of its spring of connecting and rainwater, when the movable block removed to the drain pipe below, the rainwater will be discharged, such benefit lies in, utilizes rainwater and spring to make the movable block do periodic reciprocating motion.
2: the up-and-down reciprocating motion of the movable block can drive the piston block in the air pressure box to carry out reciprocating motion through the connecting rod, and the piston block is internally provided with an air pressure channel and a one-way valve, so that the gas on the upper side of the air pressure box can be pressed into the lower part of the piston block in the motion of the piston block and is input into the expansion airbag in the storage box, the expansion airbag is expanded, the upper side outlet of the support box is shielded by the expansion airbag, rainwater is prevented from entering in a large quantity, and the support effect of the support box is influenced.
3: when external rainwater is great, the intake pipe will input more rainwater, can make piston piece and movable block wholly move down like this to remove extreme position, the piston piece will produce the electricity in the conductor layer and connect under this position, thereby makes external power supply to the suction pump power supply, like this under the high-speed operation of suction pump, takes out the water in the supporting box fast, thereby avoids the problem that the natural outflow speed is not enough under the great condition of rainfall amount.
4. The drain pipe is connected and is provided with the flow pipe to the other end of flow pipe is connected with the cavity in the down tube, makes down tube self gravity increase under rainwater weather through water pressure effect like this, thereby increases its holding power to the supporting box, improves the supporting effect, avoids appearing the foundation ditch and collapses the scheduling problem, and when normal use, down tube self quality is less, will conveniently carry and install.
In conclusion, the invention realizes the shielding effect on the foundation pit through the self-inflating work of the inflatable air bag in the rainwater weather, avoids a large amount of rainwater from flowing in, and carries out self-detection and increases the flowing speed of the rainwater when the rainwater amount is larger.
Drawings
Fig. 1 is a schematic structural diagram of an inner support structure of a foundation pit according to the present invention;
fig. 2 is a top view of a driving box in an inner supporting structure of a foundation pit according to the present invention;
fig. 3 is a schematic structural diagram of an oblique rod in an inner support structure of a foundation pit according to the present invention;
fig. 4 is an enlarged schematic view of a portion a of an inner support structure of a foundation pit according to the present invention.
In the figure: the device comprises a support box 1, a liquid outlet hole 2, a liquid outlet pipe 3, a drive box 4, an inclined rod 5, a movable block 6, a connecting rod 7, a spring 8, a liquid discharge pipe 9, a pneumatic box 10, a piston block 11, a pneumatic channel 12, a first one-way valve 13, an air inlet pipe 14, an air inflation pipe 15, a storage box 16, an expansion air bag 17, a rotating plate 18, a torsion spring 19, a second one-way valve 20, an air inlet hole 21, a branch flow pipe 22, a pressurization pipe 23, a cavity 24, a conductor layer 25 and a water suction pump 26.
Detailed Description
Referring to fig. 1-4, a foundation pit inner supporting structure, including supporting box 1, supporting box 1 inlays to be established in ground and is located middle part height department and has seted up a plurality of liquid holes 2, a plurality of liquid holes 2 set up on four inner walls of supporting box 1 and every liquid hole 2 equal sealing connection has a drain pipe 3, a plurality of drain pipes 3 communicate jointly and are provided with drive box 4, 4 ring structure of drive box and supporting box 1 are located the inside part of drive box 4, be connected with the drive structure in the drive box 4, the bottom of supporting box 1 is provided with a plurality of down tube 5, a plurality of down tube 5 use supporting box 1 axis to set up as polar axis ring array, down tube 5 is connected with supplementary bearing structure. Wherein the ground is set to a state that the middle is high and both sides are low, so that rainwater cannot directly flow into the supporting box 1 from the outside in a normal state.
The driving structure comprises a movable block 6 which is connected in a sealing sliding manner in a driving box 4, the inner diameters of the movable block 6 and the driving box 4 are kept consistent, the joint of a liquid outlet pipe 3 and the driving box 4 is positioned at the upper side of the movable block 6, the top of the movable block 6 is fixedly connected with a plurality of connecting rods 7, the outer side of each connecting rod 7 is sleeved with a spring 8, the bottom of each spring 8 is fixedly connected with the upper end face of the movable block 6, the top of each spring 8 is fixedly connected with the inner top wall of the driving box 4, so that when the movable block 6 is subjected to rainwater pressure, the position of the movable block 6 is lowered, when the pressure is not received, the movable block 6 is restored under the resetting action of the spring, the driving box 4 is provided with a water outlet hole and is connected with a liquid discharge pipe 9 in a sealing manner, the other end of the liquid discharge pipe 9 is communicated with an external sewage discharge pipe, and the rainwater is discharged through the sewage discharge pipe, the top end of each connecting rod 7 penetrates through the top wall of the driving box 4 and is communicated with a pneumatic box 10 arranged in the ground, a piston block 11 is connected in each pneumatic box 10 in a sealing and sliding mode, a pneumatic channel 12 is formed in each piston block 11 in a penetrating mode, a first check valve 13 is connected at the joint of each pneumatic channel 12 and the upper side of the corresponding piston block 11 in a sealing mode, the first check valve 13 allows gas to flow into the lower side from the upper side of the pneumatic channel 12, when the piston block 11 moves upwards, the gas above the pneumatic box 10 enters the lower side of the piston block 11, when the piston block 11 moves downwards, the gas below the piston block 11 in the pneumatic box 10 is discharged, an air inlet hole 21 is formed in the top of the pneumatic box 10 in a penetrating mode, an air inlet pipe 14 is connected in the pneumatic box 21 in a sealing mode, and the top of the air inlet pipe 14 extends out of the ground and is communicated with the outside.
The side wall of the air pressure box 10 below the piston block 11 is connected with an inflation tube 15 in a sealing manner, the other end of the inflation tube 15 is communicated with a storage box 16 arranged in the ground, the bottom of the storage box 16 is fixedly connected with an inflation air bag 17, the inflation air bag 17 is in an umbrella-shaped structure in an inflation state, under the condition that the inflation air bag 17 is inflated and is positioned above the support box 1 so as to partially shield the support box 1 and prevent rainwater from entering, the top of the storage box 16 is connected with a rotating plate 18 in a sealing manner, a torsional spring 19 is arranged at the rotating connection position of the rotating plate 18 and the storage box 16, when the inflation air bag 17 is inflated, the resistance of the torsional spring 19 is broken to enable the rotating plate 18 to rotate, the connection position of the inflation tube 15 and the air pressure box 10 is connected with a second one-way valve 20 in a sealing manner, the specified flow direction of the second one-way valve 20 is the same as that of the first one-way valve 13, one end of the air inlet tube 14 outside the ground is arranged in a bent tube structure and the bent direction towards the ground, this allows only gas to enter the inlet pipe 14 when the liquid does not exceed the elbow height of the inlet pipe 14.
The auxiliary supporting structure comprises a branch pipe 22 connected with a liquid discharge pipe 9 in a sealing manner, the other end of the branch pipe 22 is communicated to the inclined rods 5, the bottoms of the inclined rods 5 are jointly connected with a pressure increasing pipe 23, a cavity 24 is formed in the inner portion of each inclined rod 5, the other end of the branch pipe 22 is communicated with the cavity 24 in each inclined rod 5, a conductor layer 25 is fixedly connected to the inner bottom wall of the air pressure box 10, the lower end face of the piston block 11 is made of a metal conductor material, a water suction pump 26 is electrically connected to the conductor layer 25, the water suction pump 26 is arranged at the joint of the liquid discharge pipe 9 and the branch pipe 22, the lower end face of the piston block 11 is electrically connected with an external power supply, the water suction pump 26 is powered to work when the piston block 11 is in contact with the conductor layer 25, the rainwater outflow speed is increased through the water suction pump 26, and the blocking problem of the liquid outlet hole 2 is avoided.
When the invention is used, when the rainwater amount is less, the entering speed of the rainwater is lower than the discharging speed, the rainwater in the foundation pit enters the driving box 4 and acts on the movable block 6 when the rainwater amount exceeds the height of the liquid outlet hole 2, so that the movable block 6 moves downwards under the action of pressure, the piston block 11 moves downwards, and when the movable block 6 is lower than the height of the liquid outlet pipe 3, the rainwater is discharged through the liquid outlet pipe 3, and when partial rainwater does not fall on the movable block 6 completely, the pressure on the movable block 6 is reduced, the movable block 6 returns to the original position under the action of the spring 8, so that the piston block 11 moves upwards, and the piston block 11 moves back and forth in the subsequent rainwater flow, so that the gas is continuously flushed into the expansion airbag 17 through the inflation pipe 15 through the two one-way valves and the air inlet pipe 14 to expand the expansion airbag, thereby realizing the effect of shielding the upper opening of the support box 1, and avoiding the rainwater from entering and soaking the support box 1 in a large amount, the service life is influenced.
Although more terms are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (7)
1. A foundation pit inner supporting structure comprises a supporting box (1) and is characterized in that the supporting box (1) is embedded in the ground and is provided with a plurality of liquid outlet holes (2) at the middle height, the liquid outlet holes (2) are arranged on four inner walls of the supporting box (1), each liquid outlet hole (2) is hermetically connected with a liquid outlet pipe (3), the liquid outlet pipes (3) are commonly communicated with a driving box (4), the driving box (4) is of an annular structure, the supporting box (1) is positioned at the inner part of the driving box (4), be connected with the drive structure in drive case (4), the bottom of supporting box (1) is provided with a plurality of down tube (5), and is a plurality of down tube (5) use supporting box (1) axis to set up as polar axis annular array, down tube (5) are connected with auxiliary stay structure.
2. An excavation supporting structure according to claim 1, wherein the driving structure comprises a movable block (6) sealingly slidably connected in a driving box (4), the joint of the liquid outlet pipe (3) and the driving box (4) is positioned at the upper side of the movable block (6), the top of the movable block (6) is fixedly connected with a plurality of connecting rods (7), the outer side of each connecting rod (7) is sleeved with a spring (8), the bottom of each spring (8) is fixedly connected with the upper end face of the movable block (6), the top of each spring (8) is fixedly connected with the inner top wall of the driving box (4), the driving box (4) is positioned below the movable block (6) and is provided with a water outlet hole, a liquid discharge pipe (9) is hermetically connected with the driving box, and the other end of the liquid discharge pipe (9) is communicated with an external sewage discharge pipe.
3. An excavation supporting structure according to claim 1, wherein the top end of each connecting rod (7) penetrates through the top wall of the driving box (4) and is communicated with a pneumatic box (10) arranged in the ground, a piston block (11) is connected in a sealing and sliding manner in each pneumatic box (10), a pneumatic channel (12) is formed in each piston block (11) in a penetrating manner, a first one-way valve (13) is connected at the joint of each pneumatic channel (12) and the upper side of the corresponding piston block (11) in a sealing manner, the first check valve (13) allows gas to flow from the upper side to the lower side of the gas pressure passage (12), an air inlet (21) penetrates through the top of the air pressure box (10), an air inlet pipe (14) is connected in the air inlet (21) in a sealing mode, and the top of the air inlet pipe (14) extends out of the ground and is communicated with the outside.
4. The foundation pit internal support structure according to claim 3, wherein the side wall of the air pressure box (10) below the piston block (11) is connected with an inflation tube (15) in a sealing mode, the other end of the inflation tube (15) is communicated with a storage box (16) arranged in the ground, an expansion air bag (17) is fixedly connected to the bottom of the storage box (16), the expansion air bag (17) is in an umbrella-shaped structure in an expansion state, the top of the storage box (16) is connected with a rotating plate (18) in a sealing and rotating mode, and a torsion spring (19) is arranged at the rotating connection position of the rotating plate (18) and the storage box (16).
5. An excavation supporting structure according to claim 4, characterized in that a second one-way valve (20) is connected at the joint of the inflation pipe (15) and the air pressure tank (10) in a sealing manner, the prescribed flow direction of the second one-way valve (20) is the same as that of the first one-way valve (13), and one end of the air inlet pipe (14) outside the ground is provided with a bent pipe structure and the bending direction is towards the ground.
6. An underground pit supporting structure according to claim 5, characterized in that the auxiliary supporting structure comprises a branch pipe (22) connected with a drain pipe (9) in a sealing manner, the other end of the branch pipe (22) is communicated with an oblique rod (5), a pressure increasing pipe (23) is connected with the bottoms of a plurality of oblique rods (5) together, a cavity (24) is formed in each oblique rod (5), and the other end of the branch pipe (22) is communicated with the cavity (24) in the oblique rod (5).
7. A foundation pit support structure as claimed in claim 6, wherein a conductor layer (25) is fixedly connected to the inner bottom wall of the pneumatic box (10), a metal conductor material is arranged on the lower end surface of the piston block (11), a water pump (26) is electrically connected to the conductor layer (25), the water pump (26) is arranged at the joint of the drainage pipe (9) and the branch pipe (22), and the lower end surface of the piston block (11) is electrically connected with an external power supply, so that the water pump (26) is powered when the piston block (11) is in contact with the conductor layer (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110797096.9A CN113565103B (en) | 2021-07-14 | 2021-07-14 | Inner supporting structure for foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110797096.9A CN113565103B (en) | 2021-07-14 | 2021-07-14 | Inner supporting structure for foundation pit |
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| CN113565103A true CN113565103A (en) | 2021-10-29 |
| CN113565103B CN113565103B (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110797096.9A Active CN113565103B (en) | 2021-07-14 | 2021-07-14 | Inner supporting structure for foundation pit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4516878A (en) * | 1981-10-13 | 1985-05-14 | Linde Aktiengesellschaft | Tunnel constructing |
| CN105862874A (en) * | 2016-04-14 | 2016-08-17 | 浙江科技学院 | Protection method for controlling deformation of building structure close to foundation pit |
| CN108755726A (en) * | 2018-06-12 | 2018-11-06 | 张玲 | A kind of building foundation pit drainage arrangement |
| CN210288426U (en) * | 2019-07-11 | 2020-04-10 | 陕西建工基础工程集团有限公司 | Permanent supporting structure for foundation pit in densely-arranged cast-in-place pile under complex environment |
| CN112049120A (en) * | 2020-08-15 | 2020-12-08 | 柏铁全 | Foundation pit supporting structure with foundation pit construction parameter measurement function |
| CN112482391A (en) * | 2020-10-05 | 2021-03-12 | 姜洪友 | Inner supporting structure for foundation pit |
| CN213358698U (en) * | 2020-10-12 | 2021-06-04 | 中铁十九局集团有限公司 | Protection device of deep basal pit high pressure-bearing water well |
-
2021
- 2021-07-14 CN CN202110797096.9A patent/CN113565103B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4516878A (en) * | 1981-10-13 | 1985-05-14 | Linde Aktiengesellschaft | Tunnel constructing |
| CN105862874A (en) * | 2016-04-14 | 2016-08-17 | 浙江科技学院 | Protection method for controlling deformation of building structure close to foundation pit |
| CN108755726A (en) * | 2018-06-12 | 2018-11-06 | 张玲 | A kind of building foundation pit drainage arrangement |
| CN210288426U (en) * | 2019-07-11 | 2020-04-10 | 陕西建工基础工程集团有限公司 | Permanent supporting structure for foundation pit in densely-arranged cast-in-place pile under complex environment |
| CN112049120A (en) * | 2020-08-15 | 2020-12-08 | 柏铁全 | Foundation pit supporting structure with foundation pit construction parameter measurement function |
| CN112482391A (en) * | 2020-10-05 | 2021-03-12 | 姜洪友 | Inner supporting structure for foundation pit |
| CN213358698U (en) * | 2020-10-12 | 2021-06-04 | 中铁十九局集团有限公司 | Protection device of deep basal pit high pressure-bearing water well |
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|---|---|
| CN113565103B (en) | 2022-10-18 |
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Effective date of registration: 20220922 Address after: Room 1103, Lvyuan Building, No. 108, Xingfu Road, Aktao County, Kizilsu Kirgiz Autonomous Prefecture, Xinjiang Uygur Autonomous Region 845550 Applicant after: Xinjiang Fuchang Construction Engineering Co.,Ltd. Address before: 341000 Ganzhou chamber of Commerce building, No. 31, Changzheng Avenue, Shuinan Town, Zhanggong District, Ganzhou City, Jiangxi Province Applicant before: Cao Yanjun |
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