CN212358401U - Sediment thickness detection device before bored concrete pile becomes stake - Google Patents
Sediment thickness detection device before bored concrete pile becomes stake Download PDFInfo
- Publication number
- CN212358401U CN212358401U CN202021085152.3U CN202021085152U CN212358401U CN 212358401 U CN212358401 U CN 212358401U CN 202021085152 U CN202021085152 U CN 202021085152U CN 212358401 U CN212358401 U CN 212358401U
- Authority
- CN
- China
- Prior art keywords
- threaded
- column
- torsion
- thickness
- scale
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
本实用新型公开了一种灌注桩成桩前沉渣厚度检测装置，包括连接杆、第一螺纹盘、第二螺纹盘和扭力机构，连接杆包括光杆、螺纹杆和钻头，扭力机构、螺纹杆、光杆、钻头从上至下依次螺纹连接，第一螺纹盘与第二螺纹盘均套接在连接杆上，第一螺纹盘上阵列插接有四个销钉，第一螺纹盘上还垂直设有一刻度指示板，扭力机构包括扭柱、刻度盘和定位柱，刻度盘、扭柱依次套于定位柱上，刻度盘与扭柱、定位柱之间通过限位件连接。本装置的各个部件重量轻且属于拼装构件，便于携带；本构件测量过程中具有很强的稳定性，能够减少测量误差；本构件敏感度高，能够精准的区分钻头是否跨过沉渣层进入持力层。
The utility model discloses a slag thickness detection device before the cast-in-place pile is formed, which comprises a connecting rod, a first threaded disk, a second threaded disk and a torsion mechanism. The connecting rod comprises a polished rod, a threaded rod and a drill bit. The polished rod and the drill bit are connected in sequence from top to bottom, the first threaded disk and the second threaded disk are both sleeved on the connecting rod, four pins are inserted in an array on the first threaded disk, and the first threaded disk is also vertically provided with a The scale indicator plate, the torsion mechanism includes a torsion column, a dial and a positioning column, the dial and the torsion column are sequentially sleeved on the positioning column, and the dial, the torsion column and the positioning column are connected by a limit piece. Each component of the device is light in weight and is an assembled component, which is easy to carry; the component has strong stability during the measurement process, which can reduce measurement errors; the component has high sensitivity and can accurately distinguish whether the drill bit crosses the sediment layer into the holding force layer.
Description
Technical Field
The utility model belongs to the technical field of building engineering house foundation bored concrete pile construction, concretely relates to bored concrete pile is sediment thickness detection device before stake.
Background
In recent decades, with the development of the construction industry, super high-rise buildings are more and more in China, when the super high-rise buildings are in places with poor soil quality, pile foundations need to be adopted, the pile diameters of general pile foundations are large, and cast-in-place piles are widely applied. Compared with other piles such as precast piles and the like, the cast-in-place pile has the biggest defects that hole bottom sediments cannot be thoroughly cleaned, and the quality problems of insufficient bearing capacity, overlarge pile position deviation, excessive pile hole inclination and the like can occur due to the fact that the hole bottom sediments are too thick, and the quality problems are always fatal, and because the design requirements cannot be met after pile forming is completed, and the repair is difficult. Therefore, the sediment is a main factor influencing the bearing capacity of the pile foundation, the maximum loss of the end resistance can reach more than 80% due to the excessively thick sediment, and the maximum loss of the side resistance can reach more than 70%, so the sediment thickness must be strictly controlled, and the method is specified in the technical Specification of building pile foundations (JGJ 94-2008): before pouring concrete, the thickness of the sediment at the bottom of the hole is not more than 50mm relative to the end-bearing type pile; should not be greater than 100mm for friction type piles; the pile with the resistance to pulling and horizontal force is not more than 200 mm. In order to measure the accurate sediment thickness to ensure that the pile can meet the design requirements as much as possible, the sediment thickness detection device is required to be used for measuring the sediment thickness.
The current methods for measuring the thickness of sediment are mainly divided into a heavy hammer method, an ultrasonic method and a sampling box detection method. The weight (generally more than or equal to 1 kg) adopted in the hammer measurement method is not suitable for being too large in volume. The same hanging hammer and the same hanging method are adopted to sink the ball into the slurry in the hole, the ball is slowly lowered, the top surface position of the sediment is judged according to the hand feeling of an operator, when the hammer ball is felt to reach the top surface of the sediment, the length Hc of the placed measuring rope is recorded in time, then the difference delta H between the two values is compared with the drilling depth Hz, and the thickness of the sediment is obtained. The method is more intuitive and convenient for detecting the thickness of the sediment at the bottom of the hole, but has larger influence of human factors in specific operation and poorer measurement precision, so that the method is not generally adopted by large-scale important projects. The ultrasonic method measures the sediment thickness by using sound wave conversion, the measurement result is relatively accurate, but the cost of the ultrasonic instrument is too high, and the ultrasonic instrument is not suitable for large-scale use. The sampling box detection method is characterized in that after hole cleaning is finished, the sampling box is hung to the bottom of a hole, and before concrete is poured, the thickness of residue soil precipitated in the box is measured. The method is troublesome in field operation, and the measurement precision is low due to large uncertain factors.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sediment thickness detection device before bored concrete pile becomes stake to solve the problem that proposes among the above-mentioned background art. The technical scheme of the utility model is realized like this:
the utility model provides a bored concrete pile is sediment thickness detection device before stake, includes connecting rod, first thread dish, second thread dish and torque mechanism, the connecting rod includes polished rod, threaded rod and drill bit, torque mechanism, threaded rod, polished rod, drill bit are from last to down threaded connection in proper order, first thread dish all cup joints with the second thread dish on the connecting rod, just first thread dish threaded connection is in on the threaded rod, second thread dish threaded connection is in on the drill bit, four pins are pegged graft on the array on the first thread dish, still be equipped with a scale indicator plate perpendicularly on the first thread dish, torque mechanism includes turns round post, calibrated scale and reference column, the calibrated scale, turns round the post and overlaps in proper order on the reference column, the calibrated scale is located turns round between post and reference column, it screws up through the bolt to turn round the post on the reference column, the calibrated scale with turn round post, The positioning columns are connected through the limiting parts.
The utility model discloses an among the bored concrete pile is the sediment thickness detection device before stake, the locating part includes first steel ball, second steel ball and first spring, the reference column outer lane is the ladder column, the calibrated scale, turn round the post and all cup joint on the path post of reference column, it is equipped with four rectangular channels to turn round the toe portion array, reference column up end array is equipped with four steel ball grooves, first steel ball is pressed with first spring and is arranged in the rectangular channel, the second steel ball is arranged in the steel ball inslot.
The utility model discloses an among the bored concrete pile is the sediment thickness detection device before stake, the calibrated scale up end is equipped with four first arc steel bead grooves that correspond with the rectangular channel, and the lower terminal surface is equipped with four second arc steel bead grooves that correspond with the steel bead groove.
The utility model discloses an among the bored concrete pile is former sediment thickness detection device, be equipped with a lug on the first thread plate, be equipped with scale indicator board slot and suppress a mounting groove in the lug, two suppress a mounting groove symmetries and locate scale indicator board slot both sides, the scale indicator board is in through suppressing a chucking in the scale indicator board slot, suppress in arranging in the piece mounting groove that suppresses in the piece, suppress including clamp plate and second spring, second spring both ends difference fixed connection first thread plate and clamp plate, the scale indicator board is pressed from both sides between two clamp plates.
The utility model discloses an among the bored concrete pile before stake sediment thickness detection device, the quantity of polished rod is more than 1.
The utility model discloses an among the bored concrete pile before stake sediment thickness detection device, the scale indicator panel stand in the calibrated scale side, the nearly scale plate side of scale indicator panel is equipped with vertical scale, the calibrated scale is equipped with the circumference scale.
The utility model discloses an among the bored concrete pile is the sediment thickness detection device before stake, it is equipped with the torsion bar of bisymmetry to turn round the post side.
The utility model discloses an among the bored concrete pile before stake sediment thickness detection device, be equipped with the major segment screw thread on the threaded rod, the drill bit lower extreme is equipped with the segment screw thread.
Implement the utility model discloses a sediment thickness detection device before this kind of bored concrete pile becomes stake has following beneficial effect:
(1) each part of the device is light in weight, belongs to an assembly component and is convenient to carry; the component has strong stability in the measuring process, and can reduce the measuring error; the component has high sensitivity, and can accurately distinguish whether the drill crosses the sediment layer to enter the bearing layer.
(2) The first threaded disc is matched with the pin for use, so that effective support is provided for the whole device, force application of a torsion mechanism is facilitated, and the thickness of the sediment layer can be obtained according to the moving distance of the first threaded disc on the threaded rod;
(3) the arrangement of the second threaded disc can sense the sediment before measurement, the drill bit is isolated above the sediment layer, and the bottom of the second threaded disc and the bottom of the drill bit are on the same horizontal plane before measurement, namely close to the sediment, so that the thickness of the sediment layer can be accurately measured;
(4) the arrangement of the torsion mechanism can increase the sensitivity of the device, and can quickly judge whether the drill bit contacts the bearing layer so as to achieve the purpose of accurately measuring the thickness of the sediment layer;
(5) the setting of lug and suppress spare for the scale indicator board can be installed on first thread disc very conveniently, and can carry out position control from top to bottom in a flexible way, according to the position of first thread disc when measuring, adjusts the upper and lower position of scale indicator board, makes certain integer scale mark or zero scale mark of scale indicator board aim at the top surface of calibrated scale, is convenient for read the displacement of accurate connecting rod 1 downstream, in order to obtain accurate sediment layer degree of depth.
Drawings
FIG. 1 is a schematic view of the device for detecting the thickness of the sediment before the cast-in-place pile is formed;
FIG. 2 is a cross-sectional view of the sediment thickness detection device before the cast-in-place pile is formed;
fig. 3 is a sectional view of the torsion mechanism of the present invention;
fig. 4 is a schematic view of another direction structure of the first thread plate connected to the scale indicating plate according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 4, the device for detecting the thickness of the sediment before the cast-in-place pile is formed comprises a connecting rod 1, a first threaded disc 2, a second threaded disc 3 and a torsion mechanism 4, wherein the connecting rod 1 comprises a polished rod 11, a threaded rod 12 and a drill bit 13, the bottom of the drill bit 13 is in a cross cone shape, the torsion mechanism 4, the threaded rod 12, the polished rod 11 and the drill bit 13 are sequentially in threaded connection from top to bottom, the number of the polished rods 11 is more than 1, when the pile depth is large, a plurality of polished rods can be spliced to meet the pile depth requirement, the first threaded disc 2 and the second threaded disc 3 are both sleeved on the connecting rod 1, the threaded rod 12 is provided with large-section threads, the lower end of the drill bit 13 is provided with small-section threads, the first threaded disc 2 is in threaded connection with the threaded rod 12, the second threaded disc 3 is in threaded connection with the drill bit 13, four pins 5 are inserted in an array on the, the scale indicating plate 7 stands on the side of the dial 42, the scale indicating plate 7 is provided with vertical scales near the dial 42, the dial 42 is provided with circumferential scales, the torsion mechanism 4 comprises a torsion column 41, the dial 42 and a positioning column 43, two symmetrical torsion bars 412 are arranged on the side surface of the torsion column 41, the dial 42 and the torsion column 41 are sequentially sleeved on the positioning column 43, the dial 42 is positioned between the torsion column 41 and the positioning column 43, the torsion column 41 is screwed on the positioning column 43 through a bolt 6, and the dial 42 is connected with the torsion column 41 and the positioning column 43 through a limiting part 44. The first threaded disc 2 is matched with the pin 5 for use, so that effective support is provided for the whole device, force is applied by the torsion mechanism 4 conveniently, and the thickness of the sediment layer can be obtained according to the moving distance of the first threaded disc 2 on the threaded rod 12; the second threaded disc 3 can sense the sediment before measurement, the drill bit 13 is isolated above the sediment layer, and the bottom of the second threaded disc 3 and the bottom of the drill bit 13 are on the same horizontal plane before measurement, namely close to the sediment, so that the thickness of the sediment layer can be accurately measured; the arrangement of the torsion mechanism 4 can increase the sensitivity of the device, and can quickly judge whether the drill bit 13 contacts the bearing layer, so as to achieve the purpose of accurately measuring the thickness of the sediment layer.
The limiting part 44 comprises a first steel ball 441, a second steel ball 442 and a first spring 443, the outer ring of the positioning column 43 is in a stepped column shape, the dial 42 and the torsion column 41 are all sleeved on the small-diameter column of the positioning column 43, the bottom array of the torsion column 41 is provided with four rectangular grooves 411, the upper end surface array of the positioning column 43 is provided with four steel ball grooves 431, the first steel ball 441 and the first spring 443 are pressed in the rectangular grooves 411, the second steel ball 442 is arranged in the steel ball grooves 431, the upper end surface of the dial 42 is provided with four first arc-shaped steel ball grooves corresponding to the rectangular grooves 411, and the lower end surface is provided with four second arc-shaped steel ball grooves corresponding to the steel ball grooves 431. The rotation of torsion bar 412 not only can drive connecting rod 1 and rotate and advance, gets into the sediment layer, and because exert the torsion size different, the rotation radian of calibrated scale 42 can be different, and the scale increase degree of reading is also different, consequently can also judge through the increase degree of calibrated scale 42 scale whether connecting rod 1 gets into the layer of holding power from the sediment layer, when the layer of holding power is contacted, the torsion of exerting on torsion bar 412 increases rapidly, and the directional reading of scale indicator board 7 also can increase rapidly.
Be equipped with a lug on first thread plate 2, be equipped with scale indicator board slot 21 and suppress a mounting groove 22 in the lug, scale indicator board slot 21 both sides are located to two suppress piece mounting groove 22 symmetries, scale indicator board 7 is in scale indicator board slot 21 through suppressing piece 8 chucking, suppress piece 8 and arrange in suppress piece mounting groove 22, suppress piece 8 and include clamp plate 81 and second spring 82, the first thread plate 2 of second spring 82 both ends difference fixed connection and clamp plate 81, scale indicator board 7 presss from both sides between two clamp plates 81, the zero scale of scale indicator board 7 is uppermost. Lug and the setting of suppressing 8 for scale indicator 7 can be installed on first thread disc 2 very conveniently, and can carry out position control from top to bottom in a flexible way, according to the position of first thread disc 2 when measuring, adjust the upper and lower position of scale indicator 7, make certain integer scale mark or zero scale mark of scale indicator 7 aim at the top surface of calibrated scale 42, be convenient for read accurate connecting rod 1 downstream's displacement, in order to obtain accurate sediment layer degree of depth.
When in measurement, the torsion mechanism 4 needs to be rotated to twist the first spring so as to drive the connecting rod 1 to rotate, so that the rod piece slowly enters the sediment layer, and the force used by the connecting rod 1 can be read on a reading disc of the torsion mechanism 4 every time the connecting rod 1 enters the sediment layer by 1 cm. Because the connecting rod 1 is subjected to different resistances in the movement of the sediment layer and the holding layer, the force applied when the connecting rod 1 is measured to be 1 cm deep at a certain moment is greatly increased when the reading disc reads, and the end of the connecting rod 1 and the end crossing the sediment layer to enter the holding layer are explained. This allows accurate measurement of the displacement of the connecting rod 1 when it is lowered, the connecting rod 1 representing the thickness of the sediment layer.
After a bored pile is formed into a hole, a connecting rod 1 is spliced, the connecting rod sequentially passes through a first threaded disc 2 and a second threaded disc 3, finally, a torsion mechanism 4 is arranged above the connecting rod 1, the device is slowly placed into the hole until the second threaded disc 3 is contacted with the upper surface of a sediment layer, the first threaded disc 2 is contacted with a ground plane, the first threaded disc 2 is firmly nailed on the ground plane by a pin 5, a scale indicating plate 7 is adjusted up and down, a certain integer scale line of the scale indicating plate 7 is aligned with the top surface of a dial 42, a reading A is recorded, force application is started to twist the torsion mechanism 4 to enable the connecting rod 1 to slowly enter the sediment layer, meanwhile, the reading corresponding to the dial 42 is observed every 1 cm deep, until the connecting rod 1 is deep 1 cm at a certain moment, the reading of the reading disc is obviously increased greatly compared with the previous reading, the moment, the tail end of a rod piece starts to enter a force application layer, and reading the reading B of the scale indicating plate 7 again, wherein the difference of the readings AB is the thickness of the sediment layer to be measured.
The present invention is not limited to the embodiments, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The device for detecting the thickness of the sediment before the cast-in-place pile is formed is characterized by comprising a connecting rod (1), a first threaded disc (2), a second threaded disc (3) and a torsion mechanism (4), wherein the connecting rod (1) comprises a polished rod (11), a threaded rod (12) and a drill bit (13), the torsion mechanism (4), the threaded rod (12), the polished rod (11) and the drill bit (13) are sequentially in threaded connection from top to bottom, the first threaded disc (2) and the second threaded disc (3) are both sleeved on the connecting rod (1), the first threaded disc (2) is in threaded connection with the threaded rod (12), the second threaded disc (3) is in threaded connection with the drill bit (13), four pins (5) are inserted in an array on the first threaded disc (2), a scale indicating plate (7) is further vertically arranged on the first threaded disc (2), torsion mechanism (4) are including turning round post (41), calibrated scale (42) and reference column (43), calibrated scale (42), turn round post (41) overlap in proper order on reference column (43), calibrated scale (42) are located to turn round between post (41) and reference column (43), turn round post (41) and screw up through bolt (6) on reference column (43), calibrated scale (42) with turn round and connect through locating part (44) between post (41), reference column (43).
2. The device for detecting the thickness of the sediment before the cast-in-place pile is formed according to claim 1, wherein the limiting member (44) comprises a first steel ball (441), a second steel ball (442) and a first spring (443), the outer ring of the positioning column (43) is in a stepped column shape, the dial plate (42) and the torsion column (41) are sleeved on a small-diameter column of the positioning column (43), the bottom array of the torsion column (41) is provided with four rectangular grooves (411), the upper end face array of the positioning column (43) is provided with four steel ball grooves (431), the first steel ball (441) and the first spring (443) are pressed in the rectangular grooves (411), and the second steel ball (442) is arranged in the steel ball grooves (431).
3. The device for detecting the thickness of the sediment before the cast-in-place pile is formed according to claim 2, wherein the dial (42) is provided with four first arc-shaped steel bead grooves corresponding to the rectangular groove (411) on the upper end surface and four second arc-shaped steel bead grooves corresponding to the steel bead grooves (431) on the lower end surface.
4. The device for detecting the thickness of the sediment before the cast-in-place pile is formed according to claim 1, wherein a protruding block is arranged on the first threaded disc (2), a scale indicating plate slot (21) and a spring pressing piece mounting slot (22) are arranged in the protruding block, the two spring pressing piece mounting slots (22) are symmetrically arranged on two sides of the scale indicating plate slot (21), the scale indicating plate (7) is clamped in the scale indicating plate slot (21) through a spring pressing piece (8), the spring pressing piece (8) is arranged in the spring pressing piece mounting slot (22), the spring pressing piece (8) comprises a pressing plate (81) and a second spring (82), two ends of the second spring (82) are respectively and fixedly connected with the first threaded disc (2) and the pressing plate (81), and the scale indicating plate (7) is clamped between the two pressing plates (81).
5. The device for detecting the thickness of the sediments before the forming of the cast-in-place pile according to the claim 1, characterized in that the number of the polish rods (11) is more than 1.
6. The device for detecting the thickness of the sediment before the cast-in-place pile is formed according to claim 1, wherein the scale indicating plate (7) is erected beside the dial (42), vertical scales are arranged on the side, close to the dial (42), of the scale indicating plate (7), and circumferential scales are arranged on the dial (42).
7. The device for detecting the thickness of the sediment before the cast-in-place pile is formed according to claim 1, wherein two symmetrical torsion bars (412) are arranged on the side surfaces of the torsion columns (41).
8. The device for detecting the thickness of the sediment before the cast-in-place pile is formed according to claim 1, wherein a large section of thread is arranged on the threaded rod (12), and a small section of thread is arranged at the lower end of the drill bit (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021085152.3U CN212358401U (en) | 2020-06-12 | 2020-06-12 | Sediment thickness detection device before bored concrete pile becomes stake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021085152.3U CN212358401U (en) | 2020-06-12 | 2020-06-12 | Sediment thickness detection device before bored concrete pile becomes stake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212358401U true CN212358401U (en) | 2021-01-15 |
Family
ID=74154256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021085152.3U Expired - Fee Related CN212358401U (en) | 2020-06-12 | 2020-06-12 | Sediment thickness detection device before bored concrete pile becomes stake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212358401U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677022A (en) * | 2020-06-12 | 2020-09-18 | 东华理工大学 | A device for detecting the thickness of the sediment before the cast-in-place pile is formed |
-
2020
- 2020-06-12 CN CN202021085152.3U patent/CN212358401U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677022A (en) * | 2020-06-12 | 2020-09-18 | 东华理工大学 | A device for detecting the thickness of the sediment before the cast-in-place pile is formed |
| CN111677022B (en) * | 2020-06-12 | 2024-07-09 | 东华理工大学 | A device for detecting sediment thickness before cast-in-place pile construction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212358401U (en) | Sediment thickness detection device before bored concrete pile becomes stake | |
| CN118756766A (en) | A dynamic excitation ring shear apparatus with controllable normal stress on both sides | |
| CN214939073U (en) | Road thickness detection equipment for municipal engineering | |
| CN111677022B (en) | A device for detecting sediment thickness before cast-in-place pile construction | |
| CN103575651A (en) | Masonry joint tangential bond strength tester and test method | |
| CN221959930U (en) | A cross-plate shear test device suitable for soft soil | |
| CN219732100U (en) | Foundation pile bearing capacity experiment table | |
| CN210376012U (en) | A loading system for stiffened rib-reinforced rectangular concrete-filled steel tubular columns | |
| CN218765044U (en) | Well lid check out test set with calibration function | |
| CN219015300U (en) | Slope detection device | |
| CN215330079U (en) | Engineering is managed and is used foundation ditch displacement measurement device | |
| CN110219325B (en) | A pile foundation sediment thickness detection tool | |
| CN222028263U (en) | Concrete slump detection device | |
| CN222025125U (en) | Pile foundation drill core detects uses mechanism | |
| CN121498606B (en) | A probe positioning device for detecting the depth of concrete cracks | |
| CN223243529U (en) | Building multifunctional integrated pile hole detection device | |
| CN221123253U (en) | Highway thickness detection device | |
| CN219798303U (en) | Detection device for pile body stress based on sliding micrometer | |
| CN222748585U (en) | Three-in-one construction tool for slurry three-piece set | |
| CN216898840U (en) | Automatic sandstone thickness detector | |
| CN214953528U (en) | Concrete slump detects platform | |
| CN222253933U (en) | A foldable pile foundation construction hole detection device | |
| CN224004426U (en) | A novel verticality detection device for architectural engineering surveying | |
| CN210426694U (en) | Underground water level measuring device | |
| CN214121153U (en) | Device for detecting perpendicularity of pile foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210115 Termination date: 20210612 |