CN115822009A - Lime pile foundation deviation rectifying structure and construction method thereof - Google Patents
Lime pile foundation deviation rectifying structure and construction method thereof Download PDFInfo
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- CN115822009A CN115822009A CN202211523692.9A CN202211523692A CN115822009A CN 115822009 A CN115822009 A CN 115822009A CN 202211523692 A CN202211523692 A CN 202211523692A CN 115822009 A CN115822009 A CN 115822009A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 270
- 238000002347 injection Methods 0.000 claims abstract description 104
- 239000007924 injection Substances 0.000 claims abstract description 104
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- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 24
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- 238000005056 compaction Methods 0.000 claims description 11
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Abstract
The invention discloses a lime pile foundation deviation rectifying structure and a construction method thereof, wherein the method comprises the following steps of 1, pile placing position: measuring a hole at the foundation of the existing building; step 2, drilling: drilling a replacement filling hole to a designed depth by using a steel sleeve; step 3, replacing and filling: after the filling hole is changed and the hole is formed, backfilling by using quicklime, and embedding a pre-buried water injection piece at the center of the pile hole in the backfilling process; step 4, pile detection: pile detection is carried out by adopting a cutting ring sampling method, and the dry soil density is measured; step 5, pressurizing and rectifying deviation: connecting the pre-buried water injection piece with a pressure pump and an air-entrapping pump through a pipe fitting connecting piece and a guide pipe, and carrying out transverse and longitudinal operations on the foundation; according to the method, the embedded water injection piece and the pipe fitting connecting piece are designed, so that the construction process of the lime pile can be effectively optimized, meanwhile, the lime pile is used for repairing and correcting the deviation of the foundation, the construction cost and the water injection efficiency are effectively saved, the construction process is simplified, and the method has the characteristics of good deviation correction effect, simple construction process, small disturbance to the foundation and low deviation correction cost.
Description
Technical Field
The invention relates to the technical field of foundation construction, in particular to a lime pile foundation deviation rectifying structure and a construction method thereof.
Background
Building inclination is a reflection of foundation deformation caused by uneven settlement of the foundation in the upper structure; when the structure inclination rate of the building exceeds the safety range specified by the specification, the upper structure needs to be corrected by using a correction reinforcement technology, the foundation is reinforced, and the inclined building is corrected to the original state or within the safety range specified by the specification so as to normally exert the safety and the use function of the structure;
at present, there are many methods for reinforcing foundation of building foundation, including pile foundation underpinning method, root pile method, base grouting method, etc. it has become a mature design construction method, compared with other methods, the grouting valve belongs to a method for flexible jacking of building foundation raft with little destructiveness, but it still exists when it is used:
(1) The existing process can compensate the bearing capacity of a foundation, cannot solve the problem of compression deformation or collapsible deformation generated after a filled soil or collapsible soil layer is soaked in water, so that negative friction resistance caused by the compression deformation or the collapsible deformation cannot be removed, and secondary sedimentation deformation is easy to generate;
(2) The traditional process is complex in construction, needs to dig and pile soil under a foundation, and has large disturbance on the soil of a lower bedding layer of a building;
(3) The traditional process has the problems of large damage to the building foundation, inconvenience in repair and the like;
(4) And because of adopting the concrete grouting, the grouting cost is high;
based on this, it is necessary to design a lime pile foundation deviation rectifying structure and a construction method thereof to solve the problems in the prior art.
Disclosure of Invention
Aiming at the existing problems, the invention aims to provide a lime pile foundation rectification structure and a construction method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a lime pile foundation deviation rectifying method comprises
Measuring holes at the foundation of the existing building, and arranging the holes along the axis of the uneven settlement part of the existing building;
According to the pile diameter, the pile distance and the pile depth determined in the step 1, drilling a replacement filling hole to a designed depth by using a steel sleeve;
After the filling hole is changed and the hole is formed, backfilling by using quicklime, embedding a pre-buried water injection piece at the center of a pile hole in the backfilling process, and tamping the lime pile after backfilling;
And the upper port of the pre-buried water injection piece is connected with a pressure pump and an air-entrapping pump through a pipe fitting connecting piece and a guide pipe, so that the foundation is transversely and longitudinally corrected, and the foundation of the existing building is corrected.
Preferably, the pile placing process in step 1 includes
(1) Setting the number of hole site arrangement to be N, wherein the number of the hole sites is calculated according to the following formula:
wherein: a is the area of the foundation to be treated; a. The c The area of the treated foundation borne by a single soil or quicklime compaction pile is as follows:
d is the equivalent circle diameter of the area of the treated foundation shared by the single pile;
(3) The center distance S between pile holes is calculated according to the following formula:
wherein d is the diameter of the pile hole; rho d max Is the maximum dry density of the soil between piles; ρ is a unit of a gradient D Average dry density before foundation treatment; mu.s c The average compaction coefficient of the soil between piles after pore-forming compaction is as follows:
where ρ is d1 The average dry density of the soil between piles within the pore-forming compaction depth;
(3) And determining the hole depth H according to the soil layer distribution condition of the existing building provided by the survey data, wherein the hole depth H does not exceed the underground water level, and selecting a pebble layer, a round gravel layer, ancient soil and a sand layer as pile end bearing layers to determine the design depth.
Preferably, the embedded water injection part comprises an outer protective sleeve, and a high-pressure water injection mechanism, a radial positioning mechanism, a back pressure release mechanism and a heat preservation and anti-freezing assembly which are arranged on the outer protective sleeve;
the high-pressure water injection mechanism and the radial positioning mechanism are both arranged in the inner cavity of the protective sleeve;
the heat-preservation and anti-freezing component is an anti-freezing channel arranged on the protective sleeve, the anti-freezing channel is spirally arranged on the outer protective sleeve, and an air-entrapping water inlet communicated with the anti-freezing channel is arranged at the upper end of the protective sleeve;
the backpressure releasing mechanism comprises a third air pipe, a permeable plate and a positioning head, wherein the third air pipe and the permeable plate are arranged in the protective sleeve, the positioning head is arranged at the lower end of the protective sleeve, the air inlet end of the third air pipe is connected with a sixth air pipe arranged in the pipe fitting connecting piece, the air outlet end of the third air pipe is communicated with a closure assembly arranged in the protective sleeve bottom plate, the permeable plate is arranged at the lower end of the protective sleeve bottom plate, and a filling layer is arranged between the permeable plate and the positioning head.
Preferably, the protective sheath bottom plate set up in the inboard bottom of protective sheath, the porous disk is installed in the protective sheath of protective sheath bottom plate downside, and is provided with a plurality of holes and the filling layer intercommunication of permeating water on the porous disk, the head of location can be dismantled and set up at the protective sheath lower extreme, and is provided with anti-skidding line outside the head of location.
Preferably, the protective sheath bottom plate in still be provided with communicating pipe, communicating pipe and the cooperation of the second high pressure water pipe and the third trachea of setting in the protective sheath use, the subassembly that dams sets up in the communicating pipe, including intercepting piece and second spring, the piece that dams sets up in the communicating pipe through the activity of second spring, and uses with the cooperation of second high pressure water pipe and third trachea.
Preferably, the high-pressure water injection mechanism comprises a first high-pressure water pipe arranged in the protective sleeve, a one-way water injection assembly and a fourth high-pressure water pipe arranged in the pipe fitting connecting piece;
the water inlet end of the first high-pressure water pipe is connected with the fourth high-pressure water pipe, and the water outlet end of the first high-pressure water pipe is communicated with a water feeding groove arranged on the protective sleeve;
the one-way water injection assembly is arranged in a communicating groove in the protective sleeve, and the communicating groove is communicated with a water feeding groove, a diversion groove and a water injection hole which are arranged in the protective sleeve.
Preferably, the water feeding groove is an annular groove arranged on the protective sleeve, a plurality of guide holes communicated with the guide groove are formed in the water feeding groove, and the communicating groove is formed in the outer side of the guide groove and communicated with the water injection hole.
Preferably, the one-way water injection assembly includes a valve core, a valve sleeve and a first spring,
the valve core is arranged in the communicating groove, a flow guide cavity and a plurality of first injection holes which are mutually communicated are formed in the valve core, and the first injection holes are formed in the end part of the valve core and are communicated with the flow guide groove;
the valve sleeve is movably sleeved on the outer side of the valve core through a first spring, a plurality of second injection holes are formed in the sealing end of the valve sleeve, and the second injection holes are matched with the first injection holes for use; the sealing end of the valve sleeve is of a trapezoidal structure, and the trapezoidal structure is matched with a trapezoidal opening formed in the side wall of the diversion trench.
Preferably, the radial positioning mechanism comprises an arc-shaped positioning piece arranged in the protective sleeve, a water bag ring and a fifth high-pressure water pipe arranged on the pipe fitting connecting piece;
the water inlet end of the second high-pressure water pipe is connected with the fifth high-pressure water pipe, and the water outlet end of the second high-pressure water pipe is connected with the water bag ring through a branch pipe;
the water sac ring is arranged in a radial positioning groove of the protective sleeve and is matched with the arc-shaped positioning piece for use;
the arc positioning piece is arranged in the radial positioning groove, and the arc positioning piece is provided with a guide block, an arc groove, an insertion block and an insertion groove which are matched with each other, wherein the guide block is symmetrically arranged and matched with the guide groove arranged on the side wall of the radial positioning groove; the arc-shaped groove is arranged on the inner side of the arc-shaped positioning piece and is matched with the water bag ring for use.
Preferably, the pipe fitting connecting piece further comprises an outer connecting cylinder and a positioning plate,
the upper end and the lower end of the outer connecting cylinder are both provided with flange plates, and the outer connecting cylinder is connected with the protective sleeve through the flange plates;
the positioning plates are symmetrically arranged in the outer connecting cylinder, the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe are all arranged between the two symmetrically arranged positioning plates, and positioning cotton is filled in gaps among the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe;
the lower ends of the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe are respectively provided with a trapezoidal expansion water stop ring, and the expansion water stop rings are matched with trapezoidal butt joints arranged on the first high-pressure water pipe, the second high-pressure water pipe and the third air pipe for use; and control valves are arranged on the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe.
The invention has the beneficial effects that: the invention discloses a lime pile foundation rectification structure and a construction method thereof, and compared with the prior art, the invention has the improvement that:
1. the invention provides a method for correcting the foundation of a lime pile, which is used for constructing the lime pile at the foundation of an existing building through the processes of pile position placing, drilling, filling replacement, pile detection, pressurization, correction and the like, and further correcting the foundation of the existing building by using the constructed lime pile, thereby effectively saving the construction cost and the construction time; meanwhile, the process of injecting water into the lime pile is utilized to enable the lime pile to generate transverse and longitudinal extrusion forces, so that the friction force between the lime pile and the foundation bearing layer is increased, the close combination between the lime pile and the foundation is ensured, and the foundation is effectively rectified; the lime pile is used for slightly disturbing the original foundation, so that the original foundation is effectively protected, the construction process is simplified, and the method has the advantages of good deviation rectifying effect, simple construction process, small disturbance to the foundation and low deviation rectifying cost;
2. on the basis of the method, the invention designs the pre-buried water injection piece capable of completing rapid water injection, and when the pre-buried water injection piece is used, isobaric or differential water injection can be realized at different heights and different positions of the lime pile according to requirements, so that the water injection efficiency is effectively improved, the deviation correction amount of the existing building can be effectively controlled, and the excessive deviation correction is avoided; simultaneously, water injection is carried out on the lime pile by utilizing the embedded water injection piece, the deviation rectifying efficiency of the foundation is effectively improved, the embedded water injection piece can be suitable for construction under different external temperature conditions, the application range is wide, and the embedded water injection piece is convenient to popularize and use.
Drawings
FIG. 1 is a construction flow chart of the lime pile foundation deviation rectifying method of the invention.
Fig. 2 is a use effect diagram of the lime pile water injection structure of the present invention.
Fig. 3 is a mounting effect diagram of the embedded water injection piece and the pipe fitting connecting piece.
Figure 4 is a cross-sectional view of the pipe coupling of the present invention.
Fig. 5 is a cross-sectional view of the pre-buried water injection member of the present invention.
Fig. 6 is a partially enlarged view of the position a of the embedded water injection member of the present invention.
Fig. 7 is a partially enlarged view of the embedded water injection member B of the present invention.
Fig. 8 is a schematic structural view of the arc-shaped positioning element of the present invention.
Fig. 9 is a partially enlarged view of the embedded water injection member C of the present invention.
Fig. 10 is a cross-sectional view of the valve cartridge of the present invention.
Fig. 11 is a cross-sectional view of the valve sleeve of the present invention.
Fig. 12 is a partially enlarged view of the embedded water injection member D of the present invention.
Wherein: in fig. 2, a diagram (a) shows the effect of the water injection structure of the lime piles when the lime piles are vertically arranged; the figure (b) is a use effect figure of a water injection structure of the lime piles when the lime piles are obliquely arranged;
in fig. 1-12: 1. the water injection device comprises a pre-buried water injection piece, 11 parts of a protective sleeve, 111 parts of an anti-freezing channel, 112 parts of a radial positioning groove, 113 parts of a water supply groove, 114 parts of a diversion groove, 115 parts of a communicating groove, 116 parts of a water injection hole, 12 parts of a trapezoidal butt joint, 13 parts of a first high-pressure water pipe, 14 parts of a second high-pressure water pipe, 15 parts of a branch pipe, 16 parts of a third air pipe, 17 parts of a protective sleeve bottom plate, 18 parts of a water permeable plate, 181 parts of a water permeable hole, 19 parts of a filling layer, 10 parts of a second spring, 101 parts of a flow intercepting block, 102 parts of a communicating pipe, 2 parts of a pipe fitting connecting piece, 21 parts of an outer connecting sleeve, 211 parts of a flange plate, 22, a pull ring, 23, a positioning plate, 24, a fourth high-pressure water pipe, 25, a fifth high-pressure water pipe, 26, an expansion water stop ring, 27, a sixth air pipe, 28, a control valve, 3, a positioning head, 4, an arc positioning piece, 41, a guide block, 42, an arc groove, 43, an insertion block, 44, an insertion groove, 5, a water bag ring, 6, a valve core, 61, a first injection hole, 62, a bottom limiting plate, 63, a diversion cavity, 7, a valve sleeve, 71, a second injection hole, 8, a first spring, 9, a pressure pump and 91 of the existing building.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.
Example 1: referring to the attached figures 1-12, a method for correcting the deviation of a lime pile foundation comprises the step 1 of placing a pile position
Measuring holes at the foundation of the existing building, and arranging hole sites along the axis of the uneven settlement position of the existing building;
(1) The number of the hole site is N, and the number of the hole sites is calculated according to the following formula:
wherein: a is the area of the ground to be treated (m) 2 )；
A c Area (m) of foundation to be treated for single soil or quicklime compacted pile 2 )：
D is the equivalent circle diameter (m) of the area of the treated foundation shared by the single pile;
when the hole sites are arranged according to an equilateral triangle, D is 1.05S; when the hole sites are arranged in a square, D is 1.13S; s is the center distance (m) between pile holes;
(2) The center distance (m) S between pile holes is calculated as follows:
wherein d is the pile hole diameter (m); rho d max Is the maximum dry density (t/m) of the soil between piles 3 )；ρ D Is the average dry density (t/m) before foundation treatment 3 )；μ c The average compaction coefficient of the soil between piles after pore-forming compaction is not less than 0.93 for important projects, andthe general engineering should not be less than 0.90;
where ρ is d1 The average dry density (t/m) of the soil between piles within the compaction depth of the formed hole 3 )；
(3) In order to avoid the influence of underground water on the lime pile, the hole depth H is determined according to the soil layer distribution condition of the existing building provided by survey data, and the hole depth H does not exceed the underground water level, a pebble layer, a round gravel layer, ancient soil and a sand layer are selected as pile end bearing layers, and the design depth is determined;
(4) The pile position of the lime pile is arranged in the external placement area of the foundation or a pile is formed at the bottom of the foundation, and after the water injection is finished and the reinforcement is finished, a water injection pipe (steel material) in the center of the pile is poured and filled with concrete; meanwhile, due to the construction space or the requirement of deviation rectification, the lime piles can also be obliquely arranged to form piles, and after the water injection is finished and the reinforcement is finished, a water injection pipe (steel material) in the center of the pile is poured and filled with concrete;
According to the pile diameter, the pile distance and the pile depth determined in the step 1, drilling a replacement filling hole to a designed depth by using a steel sleeve;
note that: in the drilling process, when the water content of the foundation is more than 23% and the saturation degree is more than 0.65, the pile hole is easy to neck after pipe drawing due to poor hole forming quality, and the adjacent backfilled pile body is easy to damage during pipe driving, so that wall protection needs to be carried out in the hole; and during local treatment, holes are punched at intervals of 1-2 holes from outside to inside;
After hole forming, backfilling by using quicklime, embedding the pre-buried water injection part 1 at the circle center of the pile hole in the backfilling process, and tamping the lime pile after backfilling;
note that: during backfilling: (1) The soil material used by the lime pile should use clean loess or general cohesive soil dug on the spot as much as possible, and the diameter of the soil block after sieving is not more than 20mm; (3) The water content of the backfilled quicklime is close to the optimal water content, and the adjustment is carried out when the water content deviates more than 3% from the soil;
during tamping: before filling and tamping construction, testing is carried out, the quantity of fillers and tamping times of each time are determined, the weight of a tamping hammer is not less than 100kg, the diameter of a hammer bottom is smaller than the diameter of a pile hole by 90-120 mm, and the static pressure of the hammer bottom surface is not suitable to be smaller than 20kPa;
And the upper port of the embedded water injection member 1 is connected with a pressure pump 9 and an air-entrapping pump through a pipe fitting connecting piece 2 and a guide pipe, the lime pile is pressurized and injected with water by using the embedded water injection member 1, and the foundation is transversely and longitudinally treated, so that the deviation rectification work of the building 91 is completed.
Example 2: different from the embodiment 1, in order to effectively utilize the lime pile to perform horizontal and longitudinal correction on the foundation and complete the correction work of the building 91 when the pressurization correction is performed in the step 4 of the embodiment 1, the embedded water injection member 1 is designed to be embedded in the center of a lime pile hole during replacement and filling, and is connected with a conduit through a pipe connector 2, the conduit is connected with a pressurization pump 9 and an air-entrapping pump, and high-pressure water is supplied to the embedded water injection member 1 through the pressurization pump during use.
Preferably, the embedded water injection member 1 comprises an outer protective sleeve 11, and a high-pressure water injection mechanism, a radial positioning mechanism, a back pressure release mechanism and a heat preservation and anti-freezing assembly which are arranged on the outer protective sleeve 11, wherein the high-pressure water injection mechanism, the radial positioning mechanism, the back pressure release mechanism and the heat preservation and anti-freezing assembly are arranged on the outer protective sleeve 11
The high-pressure water injection mechanism and the radial positioning mechanism are both arranged in an inner cavity of the protective sleeve 11 and are used for injecting water into the lime pile on the outer side of the protective sleeve 11 and positioning the position of the protective sleeve 11 in the lime pile when in use;
the heat preservation and anti-freezing component is arranged on the side wall of the outer protective sleeve 11 and is used for preventing high-pressure water in the outer protective sleeve 11 from freezing in the water injection process;
the backpressure release mechanism comprises a third air pipe 16 arranged in an outer protective sleeve 11, a porous disc 18 and a positioning head 3 arranged at the lower end of the protective sleeve 11, wherein the air inlet end of the third air pipe 16 is connected with a sixth air pipe 27 arranged in a pipe fitting connecting piece 2, the air outlet end is communicated with a flow-stopping assembly arranged in a protective sleeve bottom plate 17, the porous disc 18 is fixedly arranged at the lower end of the protective sleeve bottom plate 17, and a filling layer 19 is arranged between the porous disc 18 and the positioning head 3.
Preferably, the protective sheath bottom plate 17 is arranged at the bottom of the inner side of the protective sheath 11, the permeable plate 18 is arranged in the protective sheath 11 at the lower side of the protective sheath bottom plate 17, the permeable plate 18 is provided with a plurality of permeable holes 181 communicated with the filling layer 19, the filling layer 19 is made of water-swellable rubber, when in use, when high-pressure water enters the filling layer 19 through the permeable holes 181, the filling layer 19 can be rapidly swelled to provide a counter force to jack up the protective sheath 11, so that the protective sheath 11 can be conveniently recovered in use; the positioning head 3 is made of a waterproof material and is embedded at the bottommost part of the lime pile in use, the positioning head 3 is separated from the protective sleeve 11 and is permanently remained in the lime pile in the process that the protective sleeve 11 is jacked up by rapidly expanding the filling layer 19, and meanwhile, the friction force between the positioning head 3 and the lime pile is enhanced in use, and anti-slip lines are further arranged on the outer side of the positioning head 3.
Preferably, in order to inject high pressure water to the surrounding by the water injection holes 116 formed at the protecting cover 11 in use, and to perform a horizontal and vertical direction of the ground, the high pressure water injection mechanism includes a first high pressure water pipe 13 formed at the protecting cover 11, a one-way water injection assembly, and a fourth high pressure water pipe 24 formed at the pipe connector 2, wherein
The water inlet end of the first high-pressure water pipe 13 is connected with the fourth high-pressure water pipe 24, and the water outlet end is communicated with the water feeding tank 113 arranged on the protective sleeve 11, namely, the first high-pressure water pipe 13 sends high-pressure water into the water feeding tank 113 when in use;
the unidirectional water injection assembly is arranged in a communicating groove 115 on the protective sleeve 11, and the communicating groove 115 is communicated with a water feeding groove 113, a diversion groove 114 and a water injection hole 116 which are arranged on the protective sleeve 11.
Preferably, the water supply tank 113 is an annular groove formed in the protective cover 11, the water supply tank 113 is provided with a plurality of guiding holes communicated with the guiding groove 114, and the guiding groove 114 guides the high-pressure water into the water supply tank, and the communicating groove 115 is formed outside the guiding groove 114 and communicated with the water injection holes 116.
Preferably, the one-way water injection assembly is fixedly installed in the communicating groove 115 and comprises a valve core 6, a valve sleeve 7 and a first spring 8, wherein
The valve core 6 is fixedly arranged in the communicating groove 115, and the valve core 6 is provided with a flow guide cavity 63 and a plurality of first injection holes 61 which are communicated with each other, wherein the flow guide cavity 63 is a through cavity with openings at two ends in the valve core 6, and the first injection holes 61 are arranged at the end part of the inner side of the valve core 6 and are communicated with the flow guide groove 114;
the valve sleeve 7 is movably sleeved on the outer side of the valve core 6 through a first spring 8, a second injection hole 71 is formed in the sealing end of the valve sleeve 7, the second injection hole 71 is matched with the first injection hole 61 for use, namely the valve sleeve 7 is sealed through the mutual dislocation effect between the first injection hole 61 and the second injection hole 71 when in use; meanwhile, in order to ensure the sealing effect between the valve sleeve 7 and the diversion trench 114, the sealing end of the valve sleeve 7 is designed to be of a trapezoidal structure and is matched with a trapezoidal opening formed in the side wall of the diversion trench 114 for use, and backflow prevention in the high-pressure water injection process is realized through interaction between the valve sleeve 7 and the trapezoidal opening.
Preferably, in order to facilitate the installation of the valve core 6, a bottom limiting disc 62 is further integrally formed at the tail of the valve core 6, and the valve core 6 is installed in the communicating groove 115 through the bottom limiting disc 62.
Preferably, in order to position the protection sleeve 11 in the lime pile in use, the radial positioning mechanism includes a second high-pressure water pipe 14 disposed in the protection sleeve 11, an arc-shaped positioning member 4, a water sac ring 5, and a fifth high-pressure water pipe 25 disposed on the pipe connector 2, wherein:
the water inlet end of the second high-pressure water pipe 14 is connected with the fifth high-pressure water pipe 25, and the water outlet end of the second high-pressure water pipe is connected with the water bag ring 5 through the branch pipe 15 to inject water into the water bag ring 5;
the water bag ring 5 is arranged in a radial positioning groove 112 on the protective sleeve 11 and is matched with the arc-shaped positioning piece 4 for use;
Preferably, in order to guide the movement of the arc-shaped positioning piece 4 when the arc-shaped positioning piece 4 is under the action of the extrusion force generated after the expansion of the water bag ring 5, the arc-shaped positioning piece 4 is further symmetrically provided with guide blocks 41, and the guide blocks 41 are matched with guide grooves arranged on the side walls of the radial positioning grooves 112 for use to guide the movement of the arc-shaped positioning piece 4; meanwhile, in order to connect the two symmetrically arranged arc-shaped positioning pieces 4 in use and enable the two arc-shaped positioning pieces to be matched with each other to move away or move towards each other in use, the arc-shaped positioning pieces 4 are also provided with inserting blocks 43 and inserting grooves 44 which are matched with each other in use; and in order that the arc-shaped positioning part 4 can be matched with the water bag ring 5 for use, an arc-shaped groove 42 is also arranged on the inner side of the arc-shaped positioning part 4, and the arc-shaped groove 42 is matched with the water bag ring 5 for use.
Preferably, in order to ensure the use of the second high-pressure water pipe 14 and the third air pipe 16 during the use, and then enable the second high-pressure water pipe 14 to inject high-pressure water into the water sac ring 5 during the use, the lower end of the second high-pressure water pipe 14 is communicated with the third air pipe 16 through a communication pipe 102, the interception assembly is arranged in the communication pipe 102 and comprises an interception block 101 and a second spring 10, wherein the interception block 101 is movably arranged in the communication pipe 102 through the second spring 10 and is used in cooperation with the second high-pressure water pipe 14 to intercept the second high-pressure water pipe 14, and when high-pressure gas is introduced into the third air pipe 16 during the use, the interception block 101 moves in a direction of compressing the second spring 10, so that the second high-pressure water pipe 14 is communicated with the water permeable plate 18 to supply water to the filling layer 19, so that the filling layer 19 is expanded when absorbing water.
Preferably, in order to prevent the high-pressure water in the protective sleeve 11 from freezing in the water injection process, the heat-insulating and anti-freezing assembly is designed to be an anti-freezing channel 111 arranged on the protective sleeve 11, the anti-freezing channel 111 is spirally arranged on the outer protective sleeve 11, and an air-entrapping water filling port is arranged at the upper end of the protective sleeve 11, so that high-temperature water or gas is added into the anti-freezing channel 111 through the air-entrapping water filling port when the water-injecting and anti-freezing device is used, the protective sleeve 11 is heated, and the high-pressure water in the protective sleeve 11 is prevented from freezing in use.
Preferably, the pipe connector 2 further comprises an outer sleeve 21 and a positioning plate 23, wherein
The outer connecting cylinder 21 is a circular part, the upper end and the lower end of the outer connecting cylinder 21 are both provided with flange plates 211, and the guide pipe and the protective sleeve 11 are detachably connected with the outer connecting cylinder 21 through the flange plates 211;
the positioning plates 23 are symmetrically installed in the outer connecting cylinder 21, an inner cavity of the outer connecting cylinder 21 is divided into a flow guide cavity and a flow dividing cavity, the fourth high-pressure water pipe 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27 are all installed between the two positioning plates 23 symmetrically arranged in the flow dividing cavity, positioning cotton 27 is filled in gaps among the fourth high-pressure water pipe 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27 to fix the fourth high-pressure water pipe 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27, trapezoidal expansion water stop rings 26 are arranged at the lower ends of the fourth high-pressure water pipe 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27 and are matched with the trapezoidal butt joints 12 arranged on the first high-pressure water pipe 13, the second high-pressure water pipe 14 and the third air pipe 16, namely, the expansion water stop rings 26 are aligned with the trapezoidal butt joints 12 arranged on the first high-pressure water pipe 13, the second high-pressure water pipe 14 and the third air pipe 16 in sequence, the trapezoidal water stop rings 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27 are aligned with the trapezoidal butt joints 12 when being installed, and are connected with the trapezoidal flanges to prevent water leakage.
Preferably, in order to control the fourth high-pressure water pipe 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27 in the water injection process and further control the pressurized water injection process of the embedded water injection member 1, control valves 28 are arranged on the fourth high-pressure water pipe 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27, and the control valves 28 are used for controlling the pipelines of the fourth high-pressure water pipe 24, the fifth high-pressure water pipe 25 and the sixth air pipe 27 to be opened and closed and further control the pressurized water injection process.
This embodiment pre-buried water injection spare 1 and pipe fitting connecting piece 2's use and theory of use include:
step 4.1: pre-embedding, namely pre-embedding the pre-embedded water injection member 1 at the center of the lime pile and tamping the lime pile;
step 4.2: then, the pipe fitting connecting piece 2 is arranged on the embedded water injection piece 1, and meanwhile, the embedded water injection piece 1 is connected with the pressure pump 9 and the air-entrapping pump through a guide pipe;
step 4.3: after the installation is finished, firstly, the control valve 28 on the fifth high-pressure water pipe 25 is opened, so that high-pressure water enters the second high-pressure water pipe 14, the water bag ring 5 expands after being injected with water, the arc-shaped positioning piece 4 is extruded outwards to act on the peripheral quick lime, and the position of the protective sleeve 11 in the lime pile is positioned;
step 4.4: after the position of the protective sleeve 11 in the lime pile is fixed, the control valve 28 arranged on the fourth high-pressure water pipe 24 is opened, so that high-pressure water enters the first high-pressure water pipe 13, and the high-pressure water is injected into surrounding quicklime through the water injection hole 116;
step 4.5: after the water injection hardening is finished, when the embedded water injection part 1 needs to be recovered, the control valve 28 on the sixth air pipe 27 is opened, so that high-pressure air enters the third air pipe 16, the interception block 101 is extruded, the interception block 101 moves along the direction of compressing the second spring 10, water is provided for the filling layer 19 through the water permeable plate 18, the filling layer 19 absorbs the water to expand, and meanwhile, when the control valve 28 on the sixth air pipe 27 is opened, the control valve 28 on the fifth high-pressure water pipe 25 can be closed as required, so that the water stored in the water bag ring 5 enters the filling layer 19, the confining pressure of surrounding soil bodies on the arc-shaped positioning part 4 is reduced, and the embedded water injection part 1 is convenient to recover when in use;
step 4.6: and after the pre-buried water injection member 1 is recovered, pouring and filling concrete into the water injection pipe (steel material) in the center of the pile.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A lime pile foundation deviation rectifying method is characterized in that: comprises that
Step 1, pile placing position
Measuring holes at the foundation of the existing building, and arranging hole sites along the axis of the uneven settlement position of the existing building;
step 2, drilling
According to the pile diameter, the pile distance and the pile depth determined in the step 1, drilling a replacement filling hole to a designed depth by using a steel sleeve;
step 3. Change pack
After the filling hole is changed and the hole is formed, backfilling by using quicklime, embedding a pre-buried water injection piece at the center of a pile hole in the backfilling process, and tamping the lime pile after backfilling;
step 4, pressurizing and rectifying deviation
And the upper port of the pre-buried water injection piece is connected with a pressure pump and an air-entrapping pump through a pipe fitting connecting piece and a guide pipe, so that the foundation is transversely and longitudinally corrected, and the foundation of the existing building is corrected.
2. The lime pile foundation deviation rectifying method according to claim 1, wherein: the pile placing position process in the step 1 comprises
(1) Setting the number of hole site arrangement to be N, wherein the number of the hole sites is calculated according to the following formula:
wherein: a is the area of the foundation to be treated; a. The c The area of the treated foundation borne by a single soil or quicklime compaction pile is as follows:
d is the equivalent circle diameter of the area of the treated foundation shared by the single pile;
(2) The center distance S between pile holes is calculated according to the following formula:
wherein d is the diameter of the pile hole; ρ is a unit of a gradient dmax Is the maximum dry density of the soil between piles; rho D Average dry density before foundation treatment; mu.s c The average compaction coefficient of the soil between piles after pore-forming compaction is as follows:
where ρ is d1 The average dry density of soil between piles within the pore-forming compaction depth;
(3) And determining the hole depth H according to the soil layer distribution condition of the existing building provided by the survey data, wherein the hole depth H does not exceed the underground water level, and selecting a pebble layer, a round gravel layer, ancient soil and a sand layer as pile end bearing layers to determine the design depth.
3. The lime pile foundation deviation rectifying method according to claim 1, wherein: the embedded water injection part comprises an outer protective sleeve, and a high-pressure water injection mechanism, a radial positioning mechanism, a back pressure release mechanism and a heat preservation and anti-freezing assembly which are arranged on the protective sleeve;
the high-pressure water injection mechanism and the radial positioning mechanism are both arranged in the inner cavity of the protective sleeve;
the heat-preservation and anti-freezing component is an anti-freezing channel arranged on the protective sleeve, the anti-freezing channel is spirally arranged on the outer protective sleeve, and an air-entrapping water inlet communicated with the anti-freezing channel is arranged at the upper end of the protective sleeve;
the backpressure releasing mechanism comprises a third air pipe, a permeable plate and a positioning head, wherein the third air pipe and the permeable plate are arranged in the protective sleeve, the positioning head is arranged at the lower end of the protective sleeve, an air inlet end of the third air pipe is connected with a sixth air pipe arranged in the pipe fitting connecting piece, an air outlet end of the third air pipe is communicated with a flow-stopping assembly arranged in the protective sleeve bottom plate, the permeable plate is arranged at the lower end of the protective sleeve bottom plate, and a filling layer is arranged between the permeable plate and the positioning head.
4. The lime pile foundation deviation rectifying method according to claim 3, wherein: the protective sheath bottom plate set up in the inboard bottom of protective sheath, the porous disk is installed in the protective sheath of protective sheath bottom plate downside, and is provided with a plurality of holes and the filling layer intercommunication of permeating water on the porous disk, the first dismantlement of location sets up at the protective sheath lower extreme, and is provided with anti-skidding line in the first outside of location.
5. The lime pile foundation deviation rectifying method according to claim 4, wherein: the protective sheath bottom plate in still be provided with communicating pipe, communicating pipe uses with the cooperation of the second high pressure water pipe and the third trachea of setting in the protective sheath, the subassembly that dams sets up in the communicating pipe, including intercepting piece and second spring, the piece that dams sets up in the communicating pipe through the activity of second spring, and uses with the cooperation of second high pressure water pipe and third trachea.
6. The lime pile foundation deviation rectifying method according to claim 5, wherein: the high-pressure water injection mechanism comprises a first high-pressure water pipe arranged in the protective sleeve, a one-way water injection assembly and a fourth high-pressure water pipe arranged in the pipe fitting connecting piece;
the water inlet end of the first high-pressure water pipe is connected with the fourth high-pressure water pipe, and the water outlet end of the first high-pressure water pipe is communicated with a water feeding groove formed in the protective sleeve;
the one-way water injection assembly is arranged in a communicating groove in the protective sleeve, and the communicating groove is communicated with a water feeding groove, a diversion groove and a water injection hole which are arranged in the protective sleeve.
7. The lime pile foundation deviation rectifying method according to claim 6, wherein: the water feeding groove is an annular groove formed in the protective sleeve, a plurality of flow guide holes are formed in the water feeding groove and communicated with the flow guide groove, and the communicating groove is formed in the outer side of the flow guide groove and communicated with the water injection holes.
8. The lime pile foundation deviation rectifying method according to claim 6, wherein: the one-way water injection assembly comprises a valve core, a valve sleeve and a first spring,
the valve core is arranged in the communicating groove, a flow guide cavity and a plurality of first injection holes which are mutually communicated are formed in the valve core, and the first injection holes are formed in the end part of the valve core and are communicated with the flow guide groove;
the valve sleeve is movably sleeved on the outer side of the valve core through a first spring, a plurality of second injection holes are formed in the sealing end of the valve sleeve, and the second injection holes are matched with the first injection holes for use; the sealing end of the valve sleeve is of a trapezoidal structure, and the trapezoidal structure is matched with a trapezoidal opening formed in the side wall of the diversion trench.
9. The lime pile foundation deviation rectifying method according to claim 6, wherein: the radial positioning mechanism comprises an arc-shaped positioning piece arranged in the protective sleeve, a water bag ring and a fifth high-pressure water pipe arranged on the pipe fitting connecting piece;
the water inlet end of the second high-pressure water pipe is connected with the fifth high-pressure water pipe, and the water outlet end of the second high-pressure water pipe is connected with the water bag ring through a branch pipe;
the water sac ring is arranged in a radial positioning groove of the protective sleeve and is matched with the arc-shaped positioning piece for use;
the arc positioning piece is arranged in the radial positioning groove, and the arc positioning piece is provided with a guide block, an arc groove, an insertion block and an insertion groove which are matched with each other, wherein the guide block is symmetrically arranged and matched with the guide groove arranged on the side wall of the radial positioning groove; the arc-shaped groove is arranged on the inner side of the arc-shaped positioning piece and is matched with the water bag ring for use.
10. The lime pile foundation deviation rectifying method according to claim 9, wherein: the pipe fitting connecting piece also comprises an outer connecting cylinder and a positioning plate,
the upper end and the lower end of the outer connecting cylinder are both provided with flange plates, and the outer connecting cylinder is connected with the protective sleeve through the flange plates;
the positioning plates are symmetrically arranged in the outer connecting cylinder, the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe are all arranged between the two symmetrically arranged positioning plates, and positioning cotton is filled in gaps among the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe;
the lower ends of the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe are respectively provided with a trapezoidal expansion water stop ring, and the expansion water stop rings are matched with trapezoidal butt joints arranged on the first high-pressure water pipe, the second high-pressure water pipe and the third air pipe; and control valves are arranged on the fourth high-pressure water pipe, the fifth high-pressure water pipe and the sixth air pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211523692.9A CN115822009A (en) | 2022-11-30 | 2022-11-30 | Lime pile foundation deviation rectifying structure and construction method thereof |
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| CN202211523692.9A CN115822009A (en) | 2022-11-30 | 2022-11-30 | Lime pile foundation deviation rectifying structure and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104032777A (en) * | 2014-05-14 | 2014-09-10 | 中冶集团武汉勘察研究院有限公司 | Method for rectifying slant of buildings through geotechnical cloth bags combined with mini pile jacking |
| KR20140147247A (en) * | 2013-06-19 | 2014-12-30 | 정광순 | Foundation slab reinforcement method for integral behavior with existing building and structure of the same |
| CN106149751A (en) * | 2015-05-28 | 2016-11-23 | 周口市颍河岩土工程有限公司 | Utilize the method that quick lime brick quarrel compaction pile reinforces building construction ground |
| CN108286270A (en) * | 2017-03-04 | 2018-07-17 | 叶长青 | A kind of deviation rectification construction method with raft foundation building |
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2022
- 2022-11-30 CN CN202211523692.9A patent/CN115822009A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140147247A (en) * | 2013-06-19 | 2014-12-30 | 정광순 | Foundation slab reinforcement method for integral behavior with existing building and structure of the same |
| CN104032777A (en) * | 2014-05-14 | 2014-09-10 | 中冶集团武汉勘察研究院有限公司 | Method for rectifying slant of buildings through geotechnical cloth bags combined with mini pile jacking |
| CN106149751A (en) * | 2015-05-28 | 2016-11-23 | 周口市颍河岩土工程有限公司 | Utilize the method that quick lime brick quarrel compaction pile reinforces building construction ground |
| CN108286270A (en) * | 2017-03-04 | 2018-07-17 | 叶长青 | A kind of deviation rectification construction method with raft foundation building |
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