CN111980042B - Deep foundation pit high pressure-bearing water well and construction method thereof - Google Patents
Deep foundation pit high pressure-bearing water well and construction method thereof Download PDFInfo
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- CN111980042B CN111980042B CN202010882584.5A CN202010882584A CN111980042B CN 111980042 B CN111980042 B CN 111980042B CN 202010882584 A CN202010882584 A CN 202010882584A CN 111980042 B CN111980042 B CN 111980042B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
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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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Abstract
The invention provides a deep foundation pit high pressure bearing water well and a construction method thereof, wherein the deep foundation pit high pressure bearing water well comprises a water well main body, wherein a well pipe is arranged in the water well main body, and the well pipe is fixed on the inner wall of the water well main body through a supporting mechanism; the water well main body comprises an upper well body and a lower well body which are coaxially arranged, the inner diameter of the upper well body is larger than that of the lower well body, a first-stage filler is filled between the lower well body and the well pipe, a second-stage filler is filled between the upper well body and the well pipe, and the top of the water well main body is provided with a well cover; the well pipe comprises a bottom end cover, a filter pipe and a drain pipe from bottom to top, wherein the bottom end cover and the filter pipe are locked and fixed through a fastening bolt, the filter pipe and the drain pipe are fixed through a fastening piece, and the sum of the heights of the bottom end cover and the filter pipe is less than the depth of the lower well body; the invention improves the bearing capacity of the well, and has the advantages of convenient construction, good stability and high safety.
Description
Technical Field
The invention relates to a high pressure-bearing water well, in particular to a deep foundation pit high pressure-bearing water well and a construction method thereof.
Background
Along with the rapid development of urbanization, rail transit and high-rise buildings are more and more popular, the construction of deep foundation pits presents a normalized trend, and the treatment of underground water is the first difficult problem to face in the projects. Because of the precipitation requirement of confined aquifers in foundation pits or the requirement of substrate anti-surge, the pressure-reducing precipitation well in the foundation pits is a common precipitation mode, but the blocking of the high-water-pressure-reducing well is difficult under the high water head pressure. In the later period, how to solve the plugging problems of large caliber, high water level, urgent gushing and the like of the dewatering well becomes a problem which must be considered by modern buildings. Subways are widely used in first-line and second-line cities as symbols of the development scale of modern cities, and the first problem in subway construction as underground buildings is foundation pit precipitation.
At present, a common foundation pit dewatering well mainly comprises a cement gravel water filter pipe, filter cloth or a palm net sheet is laid outside the cement gravel water filter pipe, but in the dewatering process under the condition of a fine sand stratum, fine silt particles easily block gaps of the palm net sheet, and the dewatering effect is poor; especially in the large-scale foundation pit dewatering of subway stations, because the dewatering period is long, the filter cloth or the palm net sheet is blocked and decayed in the later period, and the dewatering efficiency of the cement gravel water filter pipe is seriously reduced.
Disclosure of Invention
The invention provides a deep foundation pit high pressure bearing water well and a construction method thereof aiming at the problems, which improve the pressure bearing capacity of the water well, and have the advantages of convenient construction, good stability and high safety.
The specific technical scheme is as follows:
a deep foundation pit high pressure bearing water well comprises a water well main body, wherein a well pipe is arranged in the water well main body and is fixed on the inner wall of the water well main body through a supporting mechanism; the well main body comprises an upper well body and a lower well body which are coaxially arranged, the inner diameter of the upper well body is larger than that of the lower well body, a first-stage filler is filled between the lower well body and the well pipe, a second-stage filler is filled between the upper well body and the well pipe, and the top of the well main body is provided with a well cover.
Further, the well pipe comprises a bottom end cover, a filter pipe and a drain pipe from bottom to top, the bottom end cover and the filter pipe are locked and fixed through a fastening bolt, the filter pipe and the drain pipe are fixed through a fastening piece, and the sum of the heights of the bottom end cover and the filter pipe is smaller than the depth of the well body at the lower part.
Furthermore, the filter pipe comprises an outer pipe body, a plurality of first through holes are uniformly distributed on the pipe wall of the outer pipe body, a circle of inner pipe body is fixedly welded on the inner wall of the outer pipe body, a plurality of second through holes are uniformly distributed on the pipe wall of the inner pipe body, and the aperture of each first through hole is smaller than or equal to that of each second through hole; the outer diameter of the inner pipe body is smaller than the inner diameter of the outer pipe body, so that a water filtering gap is formed between the inner pipe body and the outer pipe body, and gravel particles are filled in the inner pipe body.
Further, the primary filler is formed by mixing gravel particles and natural quartz sand particles according to the mass ratio of 3: 1; the secondary packing is gravel particles.
Furthermore, the supporting mechanism comprises a plugging mechanism fixed on the inner wall of the upper well body and a connecting assembly fixed on the outer wall of the well pipe, and the plugging mechanism and the connecting assembly are connected through a long connecting rod.
Furthermore, the inserting mechanism comprises an inner fixing plate, an outer fixing plate, a main supporting column and a locking structure;
a circle of inserting columns are circumferentially arranged on the inner fixing plate with the end face circular structure, wedge blocks are arranged on the outer walls of the inserting columns, a first jack is arranged at the center of the inner fixing plate, a circle of pressure-bearing rings are respectively arranged on two end faces of the inner fixing plate, and the inserting columns are arranged outside the first jack and the pressure-bearing rings;
the end face of the outer fixing plate is of a square structure, a second jack is arranged at the center of the outer fixing plate, the second jack and the first jack of the inner fixing plate are coaxially arranged, and the side length of the outer fixing plate is larger than the outer diameter of the inner fixing plate;
the outer wall of the main supporting column is provided with external threads, and the end part of the main supporting column is provided with a gland;
the inner fixing plate is arranged by being attached to the inner wall of the upper well body, the inserting column is inserted into the upper well body, the outer fixing plate is pressed on the inner fixing plate, the main support column penetrates through the second insertion hole and the first insertion hole to be rotatably inserted and fixed into the upper well body, and the pressing cover is pressed on the outer fixing plate;
the outer fixing plate is provided with at least two adjusting through grooves, the adjusting through grooves are arranged outside the second jacks and correspond to the outer edges of the inner fixing plate, and the locking structures are arranged in the adjusting through grooves;
the locking structure comprises a bearing plate penetrating through the adjusting through groove, the bearing plate and the inner ring side wall of the adjusting through groove are fixed through a buffer structure, the buffer structure comprises a first buffer block fixed on the bearing plate and a second buffer block fixed on the inner ring side wall of the adjusting through groove, the first buffer block and the second buffer block are fixedly connected through a spring, two fastening insertion blocks are detachably arranged between the bearing plate and the outer ring side wall of the adjusting through groove, the two fastening insertion blocks are respectively inserted from the inner side and the outer side of the adjusting through groove, the surface of the fastening insertion block, which is contacted with the bearing plate, is a horizontal surface, the surface of the fastening insertion block, which is contacted with the outer ring side wall of the adjusting through groove, is a slope surface, and the thickness of the;
two ends of the bearing plate are respectively provided with a pressing plate, the two pressing plates are both arranged towards the second jack, the two pressing plates are respectively pressed on the inner fixing plate and the pressing cover of the main supporting column, the contact surfaces of the pressing plates, the inner fixing plate and the pressing cover are slope surfaces, and the thickness of the pressing plates is gradually increased outwards from the second jack; when the fastening insertion block is pressed in the adjusting through groove, the fastening insertion block pushes the support plate to move towards the second insertion hole, so that the inner fixing plate and the gland are clamped and fixed;
an upper fixing component and a lower fixing component are arranged on the outer end face of the outer fixing plate, and the upper fixing component is arranged above the lower fixing component;
the upper fixing assembly comprises a first fixing rod of a horizontally arranged V-shaped structure, a first inserting ring is arranged at the bending position of the first fixing rod, and a second inserting ring is arranged at the end part of the first fixing rod;
the lower fixing component comprises a horizontally arranged second fixing rod with a V-shaped structure, a third inserting ring is arranged at the bending position of the second fixing rod, and a fourth inserting ring is arranged at the end part of the second fixing rod;
the second inserting ring of the first fixing rod and the fourth inserting ring of the second fixing rod are arranged correspondingly and are located on the perpendicular bisector of the outer fixing plate, and the first inserting ring and the third inserting ring are arranged on two sides of the second inserting ring respectively.
Furthermore, a plurality of plugging mechanisms are correspondingly fixed on the inner wall of the upper well body in the vertical direction to form a group of plugging components, and a plurality of groups of plugging components are circumferentially fixed on the inner wall of the upper well body;
in the same group of plugging components, a first connecting rod passes through a first plugging ring from top to bottom and then is plugged and fixed at the bottom of the upper well body, and a second connecting rod passes through a third plugging ring from top to bottom and then is plugged and fixed at the bottom of the upper well body.
Further, the connecting assembly comprises an upper connecting mechanism and a lower connecting mechanism;
the upper connecting mechanisms are circumferentially and uniformly distributed on the outer wall of the drain pipe and comprise third fixed rods, fifth inserting rings are arranged at the end parts of the third fixed rods and respectively correspond to the corresponding second inserting rings or fourth inserting rings;
the lower connecting mechanisms comprise fourth fixing rods, sixth inserting rings are arranged at the end parts of the fourth fixing rods and respectively correspond to the corresponding fifth inserting rings, balls are rotatably arranged on the outer sides of the sixth inserting rings, and when the well pipe is arranged in the well main body, the balls are pressed on the inner wall of the lower well body;
and the long connecting rod penetrates through the corresponding second inserting ring, fourth inserting ring, fifth inserting ring and sixth inserting ring and is inserted and fixed at the bottom of the lower well body.
Further, the well lid includes inner cup and enclosing cover, and the top at the upper portion well body is fixed to the inner cup, and the center department of enclosing cover is equipped with the chock, and the chock passes in the inner cup inserts the well casing, and enclosing cover detachable fixes including covering.
A construction method of a deep foundation pit high pressure bearing water well comprises the following steps:
1, digging a first layer of foundation pit as an upper well body, and digging the top of the first layer of foundation pit to extend outwards to form a well cover fixing groove;
2, the splicing components are circumferentially fixed on the inner wall of the upper well body, in the same group of splicing components, a first connecting rod penetrates through a first splicing ring from top to bottom and then is spliced and fixed at the bottom of the upper well body, and a second connecting rod penetrates through a third splicing ring from top to bottom and then is spliced and fixed at the bottom of the upper well body;
3 digging a second layer of foundation pit downwards from the first layer of foundation pit as a lower well body;
4, putting the well pipe which is well assembled into a well body, arranging a fifth plugging ring and a sixth plugging ring in a staggered manner with a second plugging ring and a fourth plugging ring when the well pipe is placed in place, rotating the well pipe to a required position after the well pipe is placed in place, and then inserting and fixing a long connecting rod at the bottom of a lower well body after the long connecting rod penetrates through the corresponding second plugging ring, fourth plugging ring, fifth plugging ring and sixth plugging ring;
5 filling gravel particles into the well pipe;
6, filling a first-stage filler between the lower well body and the well pipe, and filling a second-stage filler between the upper well body and the well pipe;
7, washing the well by an air compressor until the well is clean;
8 the well lid is fixed and is sealed in the well lid fixed slot.
The invention has the beneficial effects that:
1) the invention improves the bearing capacity of the well, and has convenient construction, good stability and high safety;
2) the supporting mechanism can protect the foundation pit, ensures the construction safety, can also be used as the supporting protection of the well pipe, does not need to be dismantled during the construction, and improves the convenience of construction;
3 the plugging mechanism of the invention has the advantages of convenient installation, good firmness, high stability and convenient construction.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of a filter tube;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is an enlarged view of portion B of FIG. 3;
FIG. 5 is a sectional view showing a state where the support is installed;
FIG. 6 is a sectional view of the well casing in an installed state;
FIG. 7 is an enlarged view of portion C of FIG. 6;
FIG. 8 is a top view of the upper and lower retaining assemblies after installation.
Reference numerals
The well comprises a well body 1, a well pipe 2, a support mechanism 3, a well lid 4, a first layer foundation pit 5, a well lid fixing groove 6 and a second layer foundation pit 7;
an upper well body 101, a lower well body 102, a primary filler 103 and a secondary filler 104;
a bottom end cap 201, a filter pipe 202, a drain pipe 203, an outer pipe body 204, a first through hole 205, an inner pipe body 206, a second through hole 207, a water filtering gap 208 and gravel particles 209;
the clamping device comprises a plugging mechanism 301, a long connecting rod 302, an inner fixing plate 303, an outer fixing plate 304, a main supporting column 305, a locking structure 306, a plugging column 307, a wedge block 308, a first insertion hole 309, a pressure-bearing ring 310, a second insertion hole 311, a gland 312, an adjusting through groove 313, a supporting plate 314, a first buffer block 315, a second buffer block 316, a spring 317, a fastening plugging block 318, a pressure plate 319, an upper fixing component 320, a lower fixing component 321, a first fixing rod 322, a first plugging ring 323, a second plugging ring 324, a second fixing rod 325, a third plugging ring 326, a fourth plugging ring 327, a first connecting rod 328, a second connecting rod 329, an upper connecting mechanism 330, a lower connecting mechanism 331, a third fixing rod 332, a fifth plugging ring 333, a fourth fixing rod 334, a sixth plugging ring 335 and a ball 336; inner cap 401, outer cap 402, plug 403.
Detailed Description
In order to make the technical scheme of the invention clearer and clearer, the invention is further described with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent replacement and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.
As shown in the figure, the deep foundation pit high pressure bearing water well comprises a water well main body 1, wherein a well pipe 2 is arranged in the water well main body, and the well pipe is fixed on the inner wall of the water well main body through a supporting mechanism 3; the well body comprises an upper well body 101 and a lower well body 102 which are coaxially arranged, the inner diameter of the upper well body is larger than that of the lower well body, a first-stage filler 103 is filled between the lower well body and the well pipe, a second-stage filler 104 is filled between the upper well body and the well pipe, and the top of the well body is provided with a well cover 4.
Further, the well pipe comprises a bottom end cover 201, a filter pipe 202 and a drain pipe 203 from bottom to top, the bottom end cover and the filter pipe are locked and fixed through fastening bolts, the filter pipe and the drain pipe are fixed through fastening pieces, and the sum of the heights of the bottom end cover and the filter pipe is smaller than the depth of the well body at the lower part.
Further, the filter tube comprises an outer tube 204, a plurality of first through holes 205 are uniformly distributed on the tube wall of the outer tube, a circle of inner tube 206 is fixedly welded on the inner wall of the outer tube, a plurality of second through holes 207 are uniformly distributed on the tube wall of the inner tube, and the aperture of the first through holes is smaller than or equal to that of the second through holes; the outer diameter of the inner pipe body is smaller than the inner diameter of the outer pipe body, so that a water filtering gap 208 is formed between the inner pipe body and the outer pipe body, and gravel particles 209 are filled in the inner pipe body.
Further, the primary filler is formed by mixing gravel particles and natural quartz sand particles according to the mass ratio of 3: 1; the secondary packing is gravel particles.
Further, the support mechanism comprises a plugging mechanism 301 fixed on the inner wall of the upper well body and a connecting assembly fixed on the outer wall of the well pipe, and the plugging mechanism and the connecting assembly are connected through a long connecting rod 302.
Further, the plugging mechanism comprises an inner fixing plate 303, an outer fixing plate 304, a main supporting column 305 and a locking structure 306;
a circle of inserting columns 307 are circumferentially arranged on the inner fixing plate with the end face circular structure, wedge blocks 308 are arranged on the outer walls of the inserting columns, a first inserting hole 309 is formed in the center of the inner fixing plate, a circle of pressure-bearing rings 310 are respectively arranged on the two end faces of the inner fixing plate, and the inserting columns are arranged outside the first inserting hole and the pressure-bearing rings;
the end face of the outer fixing plate is of a square structure, a second jack 311 is arranged at the center of the outer fixing plate, the second jack and the first jack of the inner fixing plate are coaxially arranged, and the side length of the outer fixing plate is larger than the outer diameter of the inner fixing plate;
the outer wall of the main supporting column is provided with external threads, and the end part of the main supporting column is provided with a gland 312;
the inner fixing plate is arranged by being attached to the inner wall of the upper well body, the inserting column is inserted into the upper well body, the outer fixing plate is pressed on the inner fixing plate, the main support column penetrates through the second insertion hole and the first insertion hole to be rotatably inserted and fixed into the upper well body, and the pressing cover is pressed on the outer fixing plate;
the outer fixing plate is provided with at least two adjusting through grooves 313, the adjusting through grooves are arranged outside the second insertion holes and correspond to the outer edges of the inner fixing plate, and the locking structures are arranged in the adjusting through grooves;
the locking structure comprises a supporting plate 314 penetrating through the adjusting through groove, the supporting plate and the inner ring side wall of the adjusting through groove are fixed through a buffer structure, the buffer structure comprises a first buffer block 315 fixed on the supporting plate and a second buffer block 316 fixed on the inner ring side wall of the adjusting through groove, the first buffer block and the second buffer block are fixedly connected through a spring 317, two fastening insertion blocks 318 are detachably arranged between the supporting plate and the outer ring side wall of the adjusting through groove, the two fastening insertion blocks are respectively inserted from the inner side and the outer side of the adjusting through groove, the surface, contacted with the supporting plate, of each fastening insertion block is a horizontal surface, the surface, contacted with the outer ring side wall of the adjusting through groove, of each fastening insertion block is a slope surface, and the thickness of each fastening insertion block is gradually increased from the insertion end to the non-insertion end;
two ends of the supporting plate are respectively provided with a pressing plate 319, the two pressing plates are both arranged towards the second jack, the two pressing plates are respectively pressed on the inner fixing plate and the pressing cover of the main supporting column, the contact surfaces of the pressing plates, the inner fixing plate and the pressing cover are slope surfaces, and the thickness of the pressing plates is gradually increased outwards from the second jack; when the fastening insertion block is pressed in the adjusting through groove, the fastening insertion block pushes the support plate to move towards the second insertion hole, so that the inner fixing plate and the gland are clamped and fixed;
an upper fixing component 320 and a lower fixing component 321 are arranged on the outer end face of the outer fixing plate, and the upper fixing component is arranged above the lower fixing component;
the upper fixing component comprises a first fixing rod 322 which is horizontally arranged and has a V-shaped structure, a first inserting ring 323 is arranged at the bending position of the first fixing rod, and a second inserting ring 324 is arranged at the end part of the first fixing rod;
the lower fixing component comprises a horizontally arranged second fixing rod 325 with a V-shaped structure, a third inserting ring 326 is arranged at the bent part of the second fixing rod, and a fourth inserting ring 327 is arranged at the end part of the second fixing rod;
the second inserting ring of the first fixing rod and the fourth inserting ring of the second fixing rod are arranged correspondingly and are located on the perpendicular bisector of the outer fixing plate, and the first inserting ring and the third inserting ring are arranged on two sides of the second inserting ring respectively.
Furthermore, a plurality of plugging mechanisms are correspondingly fixed on the inner wall of the upper well body in the vertical direction to form a group of plugging components, and a plurality of groups of plugging components are circumferentially fixed on the inner wall of the upper well body;
in the same group of plugging components, the first connecting rod 328 passes through the first plugging ring from top to bottom and then is plugged and fixed at the bottom of the upper well body, and the second connecting rod 329 passes through the third plugging ring from top to bottom and then is plugged and fixed at the bottom of the upper well body.
Further, the connecting assembly includes an upper connecting mechanism 330 and a lower connecting mechanism 331;
the upper connecting mechanisms are circumferentially and uniformly distributed on the outer wall of the drain pipe and comprise a third fixing rod 332, a fifth inserting ring 333 is arranged at the end part of the third fixing rod, and the fifth inserting ring is respectively arranged corresponding to the corresponding second inserting ring or fourth inserting ring;
the lower connecting mechanisms are circumferentially and uniformly distributed on the outer wall of the water filter pipe and comprise a fourth fixing rod 334, the end part of the fourth fixing rod is provided with a sixth inserting ring 335, the sixth inserting ring is respectively arranged corresponding to the fifth inserting ring, the outer side of the sixth inserting ring is rotatably provided with a ball 336, and when the well pipe is arranged in the well main body, the ball is pressed on the inner wall of the lower well body;
and the long connecting rod penetrates through the corresponding second inserting ring, fourth inserting ring, fifth inserting ring and sixth inserting ring and is inserted and fixed at the bottom of the lower well body.
Further, the well lid includes inner cup 401 and enclosing cover 402, and the inner cup is fixed in the top of upper portion well body, and the center department of enclosing cover is equipped with chock 403, and the chock passes in the inner cup inserts the well casing, and the enclosing cover is detachable to be fixed including covering.
A construction method of a deep foundation pit high pressure bearing water well comprises the following steps:
1, digging a first layer of foundation pit 5 as an upper well body, and digging the top of the first layer of foundation pit to extend outwards to form a well cover fixing groove 6;
2, the splicing components are circumferentially fixed on the inner wall of the upper well body, in the same group of splicing components, a first connecting rod penetrates through a first splicing ring from top to bottom and then is spliced and fixed at the bottom of the upper well body, and a second connecting rod penetrates through a third splicing ring from top to bottom and then is spliced and fixed at the bottom of the upper well body;
3, excavating a second layer of foundation pit 7 downwards from the first layer of foundation pit to serve as a lower well body;
4, putting the well pipe which is well assembled into a well body, arranging a fifth plugging ring and a sixth plugging ring in a staggered manner with a second plugging ring and a fourth plugging ring when the well pipe is placed in place, rotating the well pipe to a required position after the well pipe is placed in place, and then inserting and fixing a long connecting rod at the bottom of a lower well body after the long connecting rod penetrates through the corresponding second plugging ring, fourth plugging ring, fifth plugging ring and sixth plugging ring;
5 filling gravel particles into the well pipe;
6, filling a first-stage filler between the lower well body and the well pipe, and filling a second-stage filler between the upper well body and the well pipe;
7, washing the well by an air compressor until the well is clean;
8 the well lid is fixed and is sealed in the well lid fixed slot.
Claims (5)
1. A deep foundation pit high pressure bearing water well is characterized by comprising a water well main body, wherein a well pipe is arranged in the water well main body and is fixed on the inner wall of the water well main body through a supporting mechanism; the water well main body comprises an upper well body and a lower well body which are coaxially arranged, the inner diameter of the upper well body is larger than that of the lower well body, a first-stage filler is filled between the lower well body and the well pipe, a second-stage filler is filled between the upper well body and the well pipe, and the top of the water well main body is provided with a well cover; the well pipe comprises a bottom end cover, a filter pipe and a drain pipe from bottom to top, wherein the bottom end cover and the filter pipe are locked and fixed through a fastening bolt, the filter pipe and the drain pipe are fixed through a fastening piece, and the sum of the heights of the bottom end cover and the filter pipe is less than the depth of the lower well body; the filter pipe comprises an outer pipe body, a plurality of first through holes are uniformly distributed on the pipe wall of the outer pipe body, a circle of inner pipe body is fixedly welded on the inner wall of the outer pipe body, a plurality of second through holes are uniformly distributed on the pipe wall of the inner pipe body, and the aperture of each first through hole is smaller than or equal to that of each second through hole; the outer diameter of the inner pipe body is smaller than the inner diameter of the outer pipe body, so that a water filtering gap is formed between the inner pipe body and the outer pipe body, and gravel particles are filled in the inner pipe body; the primary filler is formed by mixing gravel particles and natural quartz sand particles according to the mass ratio of 3: 1; the secondary filler is gravel particles; the support mechanism comprises a plugging mechanism fixed on the inner wall of the upper well body and a connecting assembly fixed on the outer wall of the well pipe, and the plugging mechanism and the connecting assembly are connected through a long connecting rod; the inserting mechanism comprises an inner fixing plate, an outer fixing plate, a main supporting column and a locking structure;
a circle of inserting columns are circumferentially arranged on the inner fixing plate with the end face circular structure, wedge blocks are arranged on the outer walls of the inserting columns, a first jack is arranged at the center of the inner fixing plate, a circle of pressure-bearing rings are respectively arranged on two end faces of the inner fixing plate, and the inserting columns are arranged outside the first jack and the pressure-bearing rings;
the end face of the outer fixing plate is of a square structure, a second jack is arranged at the center of the outer fixing plate, the second jack and the first jack of the inner fixing plate are coaxially arranged, and the side length of the outer fixing plate is larger than the outer diameter of the inner fixing plate;
the outer wall of the main supporting column is provided with external threads, and the end part of the main supporting column is provided with a gland;
the inner fixing plate is arranged by being attached to the inner wall of the upper well body, the inserting column is inserted into the upper well body, the outer fixing plate is pressed on the inner fixing plate, the main support column penetrates through the second insertion hole and the first insertion hole to be rotatably inserted and fixed into the upper well body, and the pressing cover is pressed on the outer fixing plate;
the outer fixing plate is provided with at least two adjusting through grooves, the adjusting through grooves are arranged outside the second jacks and correspond to the outer edges of the inner fixing plate, and the locking structures are arranged in the adjusting through grooves;
the locking structure comprises a bearing plate penetrating through the adjusting through groove, the bearing plate and the inner ring side wall of the adjusting through groove are fixed through a buffer structure, the buffer structure comprises a first buffer block fixed on the bearing plate and a second buffer block fixed on the inner ring side wall of the adjusting through groove, the first buffer block and the second buffer block are fixedly connected through a spring, two fastening insertion blocks are detachably arranged between the bearing plate and the outer ring side wall of the adjusting through groove, the two fastening insertion blocks are respectively inserted from the inner side and the outer side of the adjusting through groove, the surface of the fastening insertion block, which is contacted with the bearing plate, is a horizontal surface, the surface of the fastening insertion block, which is contacted with the outer ring side wall of the adjusting through groove, is a slope surface, and the thickness of the fastening insertion block is gradually increased from the insertion end to the non-insertion end;
two ends of the bearing plate are respectively provided with a pressing plate, the two pressing plates are both arranged towards the second jack, the two pressing plates are respectively pressed on the inner fixing plate and the pressing cover of the main supporting column, the contact surfaces of the pressing plates, the inner fixing plate and the pressing cover are slope surfaces, and the thickness of the pressing plates is gradually increased outwards from the second jack; when the fastening insertion block is pressed in the adjusting through groove, the fastening insertion block pushes the support plate to move towards the second insertion hole, so that the inner fixing plate and the gland are clamped and fixed;
an upper fixing component and a lower fixing component are arranged on the outer end face of the outer fixing plate, and the upper fixing component is arranged above the lower fixing component;
the upper fixing assembly comprises a first fixing rod of a horizontally arranged V-shaped structure, a first inserting ring is arranged at the bending position of the first fixing rod, and a second inserting ring is arranged at the end part of the first fixing rod;
the lower fixing component comprises a horizontally arranged second fixing rod with a V-shaped structure, a third inserting ring is arranged at the bending position of the second fixing rod, and a fourth inserting ring is arranged at the end part of the second fixing rod;
the second inserting ring of the first fixing rod and the fourth inserting ring of the second fixing rod are arranged correspondingly and are located on the perpendicular bisector of the outer fixing plate, and the first inserting ring and the third inserting ring are arranged on two sides of the second inserting ring respectively.
2. The deep foundation pit high pressure bearing water well as claimed in claim 1, wherein a plurality of plugging mechanisms are correspondingly fixed on the inner wall of the upper well body in the vertical direction to form a group of plugging components, and a plurality of groups of plugging components are circumferentially fixed on the inner wall of the upper well body;
in the same group of plugging components, a first connecting rod passes through a first plugging ring from top to bottom and then is plugged and fixed at the bottom of the upper well body, and a second connecting rod passes through a third plugging ring from top to bottom and then is plugged and fixed at the bottom of the upper well body.
3. The deep foundation pit high pressure bearing water well as claimed in claim 2, wherein the connection assembly comprises an upper connection mechanism and a lower connection mechanism;
the upper connecting mechanisms are circumferentially and uniformly distributed on the outer wall of the drain pipe and comprise third fixed rods, fifth inserting rings are arranged at the end parts of the third fixed rods and respectively correspond to the corresponding second inserting rings or fourth inserting rings;
the lower connecting mechanisms comprise fourth fixing rods, sixth inserting rings are arranged at the end parts of the fourth fixing rods and respectively correspond to the corresponding fifth inserting rings, balls are rotatably arranged on the outer sides of the sixth inserting rings, and when the well pipe is arranged in the well main body, the balls are pressed on the inner wall of the lower well body;
and the long connecting rod penetrates through the corresponding second inserting ring, fourth inserting ring, fifth inserting ring and sixth inserting ring and is inserted and fixed at the bottom of the lower well body.
4. The deep foundation pit high pressure bearing water well as claimed in claim 3, wherein the well cover comprises an inner cover and an outer cover, the inner cover is fixed on the top of the upper well body, a chock is provided at the center of the outer cover, the chock is inserted into the well pipe through the inner cover, and the outer cover is detachably fixed on the inner cover.
5. The construction method of the deep foundation pit high pressure bearing water well as claimed in claim 4, wherein the steps are as follows:
1) digging a first layer of foundation pit as an upper well body, and digging the top of the first layer of foundation pit to extend outwards to form a well cover fixing groove;
2) the plug-in components are circumferentially fixed on the inner wall of the upper well body, in the same plug-in component, a first connecting rod penetrates through a first plug-in ring from top to bottom and then is plugged and fixed at the bottom of the upper well body, and a second connecting rod penetrates through a third plug-in ring from top to bottom and then is plugged and fixed at the bottom of the upper well body;
3) digging a second layer of foundation pit downwards from the first layer of foundation pit as a lower well body;
4) putting the well pipe which is well assembled into a well body, arranging a fifth plugging ring and a sixth plugging ring in a staggered manner with a second plugging ring and a fourth plugging ring when the well pipe is placed in place, rotating the well pipe to a required position after the well pipe is placed in place, and then inserting and fixing a long connecting rod at the bottom of a lower well body after the long connecting rod penetrates through the corresponding second plugging ring, fourth plugging ring, fifth plugging ring and sixth plugging ring;
5) filling gravel particles into the well pipe;
6) a first-stage filler is filled between the lower well body and the well pipe, and a second-stage filler is filled between the upper well body and the well pipe;
7) washing the well by an air compressor until the water is clear;
8) and fixing the well lid in the well lid fixing groove for well sealing.
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| CN202010882584.5A CN111980042B (en) | 2020-08-28 | 2020-08-28 | Deep foundation pit high pressure-bearing water well and construction method thereof |
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| CN202010882584.5A CN111980042B (en) | 2020-08-28 | 2020-08-28 | Deep foundation pit high pressure-bearing water well and construction method thereof |
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| CN111980042B true CN111980042B (en) | 2021-09-24 |
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| CN114086583A (en) * | 2021-12-24 | 2022-02-25 | 中交一航局第三工程有限公司 | Dewatering well protection platform in deep foundation pit annular support system and use method |
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|---|---|---|---|---|
| EP3070204A1 (en) * | 2015-03-17 | 2016-09-21 | Hölscher Wasserbau GmbH | Device and method for conveying water from a well |
| CN207878490U (en) * | 2017-12-26 | 2018-09-18 | 上海勘察设计研究院(集团)有限公司 | A kind of precast dewatering well filtration |
| CN208844595U (en) * | 2018-09-21 | 2019-05-10 | 河北天扩电气设备集团有限公司 | Well is enclosed in a kind of novel fabricated flood control |
| CN110616727A (en) * | 2019-09-20 | 2019-12-27 | 上海广联环境岩土工程股份有限公司 | Depressurization well in deep foundation pit |
| CN211113697U (en) * | 2019-10-19 | 2020-07-28 | 湖北广元岩土工程有限公司 | Dewatering well structure |
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2020
- 2020-08-28 CN CN202010882584.5A patent/CN111980042B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3070204A1 (en) * | 2015-03-17 | 2016-09-21 | Hölscher Wasserbau GmbH | Device and method for conveying water from a well |
| CN207878490U (en) * | 2017-12-26 | 2018-09-18 | 上海勘察设计研究院(集团)有限公司 | A kind of precast dewatering well filtration |
| CN208844595U (en) * | 2018-09-21 | 2019-05-10 | 河北天扩电气设备集团有限公司 | Well is enclosed in a kind of novel fabricated flood control |
| CN110616727A (en) * | 2019-09-20 | 2019-12-27 | 上海广联环境岩土工程股份有限公司 | Depressurization well in deep foundation pit |
| CN211113697U (en) * | 2019-10-19 | 2020-07-28 | 湖北广元岩土工程有限公司 | Dewatering well structure |
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