CN113756296A - Construction method of mixing pile wall - Google Patents
Construction method of mixing pile wall Download PDFInfo
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- CN113756296A CN113756296A CN202111068913.3A CN202111068913A CN113756296A CN 113756296 A CN113756296 A CN 113756296A CN 202111068913 A CN202111068913 A CN 202111068913A CN 113756296 A CN113756296 A CN 113756296A
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- 238000010276 construction Methods 0.000 title claims abstract description 108
- 238000002156 mixing Methods 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 135
- 239000010959 steel Substances 0.000 claims abstract description 135
- 238000003756 stirring Methods 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000004568 cement Substances 0.000 claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 4
- 238000013461 design Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 239000011440 grout Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 239000003831 antifriction material Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
Abstract
The invention discloses a construction method of a mixing pile wall, which comprises the following steps: preparing before construction, and treating the earth surface in a construction area to ensure that the field is smooth; constructing a groove, excavating the groove, and positioning a stirrer; stirring construction, namely constructing by adopting a three-shaft stirring pile machine, and performing pre-stirring sinking by using the three-shaft stirring pile machine, wherein the sinking speed is 0.5-1 m/min; after the designed depth is reached, starting an mortar pump, and after the slurry reaches a slurry spraying opening, lifting the stirring pile machine to realize simultaneous slurry spraying and lifting of the stirring pile machine, wherein the lifting speed is not more than 1-2 m/min; the construction is repeated, a four-spraying and four-stirring process is realized, and the cement doping amount is ensured to meet 20-25%; the H-shaped steel is plugged and recovered, and the construction of the stirring pile wall is carried out by the method, so that the stability of the adjacent soil body can be effectively ensured, the probability of harm occurrence such as adjacent ground settlement, house inclination, road crack damage, underground facility displacement and the like is reduced, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the field of engineering construction, in particular to a construction method of a mixing pile wall.
Background
The mixing pile wall, that is, the cement pile is inserted with H-shaped steel, etc. to combine the bearing load with anti-seepage and water-retaining to form the enclosure wall with the support structure with both stress and anti-seepage functions.
In the construction process of the stirring pile wall in the prior art, the influence on the adjacent soil around exists, so that the damages such as adjacent ground settlement, house inclination, road crack damage, underground facility displacement and the like are caused, and a certain damage is brought to the structure of the formed stirring pile wall due to the influence on the adjacent soil.
In view of this, the present application is specifically made.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a construction method of a stirring pile wall, which is used for constructing the stirring pile wall, can effectively ensure the stability of the adjacent soil body, reduce the probability of harm occurrence such as adjacent ground settlement, house inclination, road crack damage, underground facility displacement and the like, and improve the construction efficiency.
The invention is realized by the following technical scheme:
the embodiment of the invention provides a construction method of a mixing pile wall, which comprises the following steps:
step S1: preparing before construction, and treating the earth surface in a construction area to ensure that the field is smooth;
step S2: constructing a groove, excavating the groove, and positioning a stirrer;
step S3: stirring construction, namely constructing by adopting a three-shaft stirring pile machine, and performing pre-stirring sinking by using the three-shaft stirring pile machine, wherein the sinking speed is 0.5-1 m/min; after the designed depth is reached, starting an mortar pump, and after the slurry reaches a slurry spraying opening, lifting the stirring pile machine to realize simultaneous slurry spraying and lifting of the stirring pile machine, wherein the lifting speed is not more than 1-2 m/min; the construction is repeated, a four-spraying and four-stirring process is realized, and the cement doping amount is ensured to meet 20-25%;
step S4: plugging and recovering the H-shaped steel.
When the construction method of the mixing pile wall related to the scheme is adopted for construction, the flatness of a construction area is ensured by processing the construction area, so that the verticality of a drilled hole is ensured when a mixing pile machine is adopted for construction, the formed pile body is prevented from inclining, and the stability of the structure is ensured; in the treatment process of the construction area, other barriers are treated, so that the construction area can be prevented from being blocked, and the transportation of the construction waste can be effectively ensured; the stirring construction method is controlled in the concrete stirring pile construction process, the stability of the stirring pile body can be effectively guaranteed, the probability of harm occurrence such as adjacent ground settlement, house inclination, road crack damage and underground facility displacement is reduced through the control of the processes of sinking, lifting and four-spraying and four-stirring, and the construction efficiency is improved.
Further, the step S2 specifically includes the following steps:
s21: measuring and lofting, carrying out pile position lofting according to a design construction drawing, and making a temporary mark;
s22: excavating a groove;
s23: placing positioning section steel, wherein the positioning section steel comprises first positioning section steel and second positioning section steel; the first positioning section steels are arranged in a direction perpendicular to the grooves, the number of the first positioning section steels is multiple, and the multiple first positioning section steels are arranged at intervals; the second positioning section steel is parallel to the direction of the groove, and the two second positioning section steel positions are respectively positioned on two sides of the groove.
Further, wherein arbitrary two adjacent first location shaped steel with the slot lateral wall forms H shaped steel whereabouts space of stepping down, the space of stepping down all is provided with the shaped steel locator card that is used for realizing the H shaped steel location.
Further, the step S3 specifically includes the following steps:
s31: positioning a three-shaft mixing pile machine, wherein the verticality deviation of the three-shaft mixing pile machine is not more than 1/100;
s32: preparing cement slurry, wherein the water-cement ratio of the cement slurry is 1.5, and the cement slurry comprises the following components: 20% of cement and 2% of bentonite;
s33: and (5) stirring construction.
Further, the stirring construction of the step S33 is performed according to a skip-trough double-hole complete-set double-stirring type connection construction.
Further, the stirring construction of step S33 is performed by a single-side extrusion connection construction.
Further, the step S4 specifically includes the following steps:
s41: performing surface treatment, namely performing cleaning treatment on the H-shaped steel, and brushing an antifriction agent on the surface of the H-shaped steel after the cleaning treatment is finished;
s42: inserting and forming H-shaped steel, namely inserting the H-shaped steel into a mixing pile, and fixing the H-shaped steel and the positioning section steel by adopting channel steel;
s43: and recovering the H-shaped steel, and pulling up the H-shaped steel for recovery after the stirring pile wall is hardened for a period of time.
Further, the step S43 specifically includes the following steps,
s431: isolating the H-shaped steel, and coating the exposed section of the H-shaped steel by adopting foamed plastic;
s432: constructing a ring beam;
s433: after the structural strength of the ring beam meets the design requirement, pulling out the H-shaped steel;
s434: and (3) filling cement grout, namely filling the corresponding position of the pulled H-shaped steel with 6-8% of cement grout.
Further, the H-shaped steel drawing specifically comprises the following steps;
connecting H-shaped steel by using a chuck, wherein one section of the chuck is connected with the H-shaped steel, and the other end of the chuck is provided with a cross arm;
the oil jack is matched with the cross arm to realize the lifting of the H-shaped steel;
and after the H-shaped steel is lifted to a certain height, the connection relation between the chuck and the H-shaped steel is disassembled, and the wedge card of the drawing machine is matched with the oil top for drawing.
Furthermore, in the process of pulling out the H-shaped steel, a crane is adopted to be connected with the H-shaped steel.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the construction method of the stirring pile wall provided by the embodiment of the invention, the stirring pile wall is constructed by the method, so that the stability of an adjacent soil body can be effectively ensured, the occurrence probability of hazards such as adjacent ground settlement, house inclination, road cracking, underground facility displacement and the like is reduced, and the construction efficiency is improved;
2. according to the construction method of the mixing pile wall provided by the embodiment of the invention, aiming at the improvement of the construction method of the mixing pile, a groove jumping or extrusion construction connection method is adopted, so that the stability of the structure is further ensured, and the phenomenon that the construction efficiency is influenced by soil body collapse in the construction process is avoided;
3. the stirring pile wall constructed by the method is particularly suitable for soft strata mainly comprising clay and fine silt, has good water retaining and seepage preventing performance, does not need to be additionally provided with a water stopping structure, has the characteristic that a stirring machine drill rod is provided with spiral propelling wings and stirring wings which are arranged alternately, can fully stir cement series reinforcers and soil along with repeated drilling and stirring, and has no seam in the whole length of the wall body, so that the stirring pile wall has more reliable water stopping performance compared with the traditional continuous wall, and the permeability coefficient K of the stirring pile wall can reach 10-7 cm/s;
4. according to the construction method of the mixing pile wall provided by the embodiment of the invention, the waste soil outward transportation amount is far less than that of other construction methods, so that the construction cost is effectively reduced;
5. according to the construction method of the mixing pile wall provided by the embodiment of the invention, through plugging and pulling of the H-shaped steel and recovery, the stability of the mixing pile wall is ensured, and meanwhile, the production cost is reduced through recovery of the H-shaped steel.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a construction method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a construction sequence of a double-hole complete set of connection with stirring in a jumping slot according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a construction sequence of a single-side extrusion type connection provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.
Examples
As shown in fig. 1, an embodiment of the present invention provides a method for constructing a mixing pile wall, including the following steps:
step S1: preparing before construction, and treating the earth surface in a construction area to ensure that the field is smooth;
step S2: constructing a groove, excavating the groove, and positioning a stirrer;
step S3: stirring construction, namely constructing by adopting a three-shaft stirring pile machine, and performing pre-stirring sinking by using the three-shaft stirring pile machine, wherein the sinking speed is 0.5-1 m/min; after the designed depth is reached, starting an mortar pump, and after the slurry reaches a slurry spraying opening, lifting the stirring pile machine to realize simultaneous slurry spraying and lifting of the stirring pile machine, wherein the lifting speed is not more than 1-2 m/min; the construction is repeated, a four-spraying and four-stirring process is realized, and the cement doping amount is ensured to meet 20-25%;
step S4: plugging and recovering the H-shaped steel.
The earth surface in the construction area is treated, including but not limited to, impurities and sludge in the construction area are cleared, the ground is leveled and compacted, and the passing of a 50t large crane is guaranteed.
When the construction method of the mixing pile wall related to the scheme is adopted for construction, the flatness of a construction area is ensured by processing the construction area, so that the verticality of a drilled hole is ensured when a mixing pile machine is adopted for construction, the formed pile body is prevented from inclining, and the stability of the structure is ensured; in the treatment process of the construction area, other barriers are treated, so that the construction area can be prevented from being blocked, and the transportation of the construction waste can be effectively ensured; through right in concrete mixing pile work progress the stirring construction method controls, can effectually guarantee to form the stability of working out the mixing pile body, through the control of sinking, promotion and "four spout four stir" technology, reduce the harm such as adjacent ground subsides, house slope, road crack decreases and underground facilities shifts and takes place the probability, and adopt this kind of construction method, compare with prior art, can effectual promotion the subsidence and the lifting speed of mixing pile foundation to realize the promotion of efficiency of construction.
In some embodiments, the step S2 specifically includes the following steps:
s21: measuring and lofting, carrying out pile position lofting according to a design construction drawing, and making a temporary mark;
s22: excavating a groove;
s23: placing positioning section steel, wherein the positioning section steel comprises first positioning section steel and second positioning section steel; the first positioning section steels are arranged in a direction perpendicular to the grooves, the number of the first positioning section steels is multiple, and the multiple first positioning section steels are arranged at intervals; the second positioning section steel is parallel to the direction of the groove, and the two second positioning section steel positions are respectively positioned on two sides of the groove.
Wherein, carry out the pile space laying-out according to the design construction drawing, should know as the technical staff in this field, for preventing because the stirring stake is inclined to the foundation ditch in the construction error that arouses on the large side, cause interior wall thickness not enough, should carry out suitable putting outward on design size basis during the construction.
Wherein, place location shaped steel, first location shaped steel with second location shaped steel can adopt the mode of overlap joint each other, conveniently builds and dismantles.
Specifically, the size of the cross section of the first positioning section steel is as follows: 200mm, length 2.5 m.
Specifically, the size of the cross section of the second positioning section steel is as follows: 350mm, length 8-12 m.
In some embodiments, any two adjacent first positioning section steels and the groove side wall form a falling abdicating space for the H-shaped steel, and the abdicating space is provided with a section steel positioning clamp for realizing positioning of the H-shaped steel.
It should be noted that, as a person skilled in the art should know, the profile steel positioning clip is used for being matched with the profile steel to fix the H-shaped steel, so the structure of the profile steel positioning clip is not limited, and the fixation of the relative position of the H-shaped steel in the subsequent H-shaped steel insertion process can be ensured, which is within the protection scope of the present invention.
In some embodiments, the step S3 specifically includes the following steps:
s31: positioning a three-shaft mixing pile machine, wherein the verticality deviation of the three-shaft mixing pile machine is not more than 1/100;
s32: preparing cement slurry, wherein the water-cement ratio of the cement slurry is 1.5, and the cement slurry comprises the following components: 20% of cement and 2% of bentonite;
s33: and (5) stirring construction.
When the three-shaft stirrer is positioned, the plumbness of the three-shaft stirrer can be guaranteed by adopting a plumb bob, and the plumbness of the three-shaft stirrer is guaranteed by connecting the plumb bob with a gantry upright post of the three-shaft stirrer.
Wherein, when the grouting of the cement paste is carried out, the grouting pressure is 1.5 Mpa-2.5 Mpa.
As shown in fig. 2, as a specific embodiment of the mixing construction, the mixing construction of step S33 is a skip-trough double-hole complete double-stirring type connecting construction.
According to the construction method for the double-hole full-set compound stirring type connection of the skip groove, a hole site is arranged between two adjacent construction working procedures, after two adjacent construction working procedures are completed, the middle pile position of the three-shaft stirring machine is aligned to the reserved middle hole site in repeated construction, the pile positions at the front end and the rear end are respectively connected with the two adjacent construction working procedures, and continuous construction of a stirring pile wall is achieved.
As another specific embodiment of the mixing operation, as shown in fig. 3, the mixing operation of step S33 is performed by a one-sided squeeze connection operation.
According to the construction method of the single-side extrusion type connection construction, in two adjacent construction processes, the hole site at the rear end of the former construction is used as the hole site at the front end of the latter construction process in the latter construction process, so that the extrusion construction is realized, the construction can be effectively realized at the corner of the enclosure wall or the position with construction discontinuity by adopting the construction method, and the stability of the structure is ensured.
In some embodiments, the step S4 specifically includes the following steps:
s41: performing surface treatment, namely performing cleaning treatment on the H-shaped steel, and brushing an antifriction agent on the surface of the H-shaped steel after the cleaning treatment is finished;
s42: inserting and forming H-shaped steel, namely inserting the H-shaped steel into a mixing pile, and fixing the H-shaped steel and the positioning section steel by adopting channel steel;
s43: and recovering the H-shaped steel, and pulling up the H-shaped steel for recovery after the stirring pile wall is hardened for a period of time.
The H-shaped steel is cleaned, and the main purpose of the cleaning method is to ensure that the friction reducer can be attached to the surface of the H-shaped steel, so that the phenomenon that the attachment relation of the friction reducer is influenced by impurities on the surface of the H-shaped steel is avoided.
Wherein the dosage of the antifriction agent is 1kg/m2。
As will be appreciated by those skilled in the art, the thickness of the friction reducer on the surface of the H-shaped steel is not less than 1mm, and the H-shaped steel cannot be used within 1 hour after the friction reducer is used.
In the process of inserting the H-shaped steel, when the H-shaped steel cannot be completely inserted in place by self weight, the head of the drill pipe is used, and static pressure or a vibration hammer is used for vibrating and pressing, so that the H-shaped steel is in place.
In some embodiments, the step S43 specifically includes the following steps,
s431: isolating the H-shaped steel, and coating the exposed section of the H-shaped steel by adopting foamed plastic;
s432: constructing a ring beam;
s433: after the structural strength of the ring beam meets the design requirement, pulling out the H-shaped steel;
s434: and (3) filling cement grout, namely filling the corresponding position of the pulled H-shaped steel with 6-8% of cement grout.
In some embodiments, the drawing of the H-section steel specifically comprises the following steps;
connecting H-shaped steel by using a chuck, wherein one section of the chuck is connected with the H-shaped steel, and the other end of the chuck is provided with a cross arm;
the oil jack is matched with the cross arm to realize the lifting of the H-shaped steel;
and after the H-shaped steel is lifted to a certain height, the connection relation between the chuck and the H-shaped steel is disassembled, and the wedge card of the drawing machine is matched with the oil top for drawing.
In this embodiment, in stirring stake wall forming process, H shaped steel's exposure length is shorter, unsatisfied the atress requirement of pulling out, so adopt the mode that chuck and H shaped steel are connected, recycle the oil top and realize H shaped steel early stage is pulled out, satisfies the atress requirement back at H shaped steel's exposure section, can directly adopt the drawing die machine to extract, adopts this kind of mode, has promoted the efficiency that H shaped steel extracted to construction efficiency's promotion has been realized.
In some embodiments, in the process of pulling out the H-shaped steel, the crane is used for being connected with the H-shaped steel, and the crane is used for being connected with the H-shaped steel, so that the stability of the H-shaped steel in the process of pulling out can be effectively ensured, and the phenomenon that the supporting structure is damaged due to instability is avoided.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A construction method of a mixing pile wall is characterized by comprising the following steps:
step S1: preparing before construction, and treating the earth surface in a construction area to ensure that the field is smooth;
step S2: constructing a groove, excavating the groove, and positioning a stirrer;
step S3: stirring construction, namely constructing by adopting a three-shaft stirring pile machine, and performing pre-stirring sinking by using the three-shaft stirring pile machine, wherein the sinking speed is 0.5-1 m/min; after the designed depth is reached, starting an mortar pump, and after the slurry reaches a slurry spraying opening, lifting the stirring pile machine to realize simultaneous slurry spraying and lifting of the stirring pile machine, wherein the lifting speed is not more than 1-2 m/min; the construction is repeated, a four-spraying and four-stirring process is realized, and the cement doping amount is ensured to meet 20-25%;
step S4: plugging and recovering the H-shaped steel.
2. The method for constructing a mixing pile wall according to claim 1, wherein the step S2 specifically comprises the following steps:
s21: measuring and lofting, carrying out pile position lofting according to a design construction drawing, and making a temporary mark;
s22: excavating a groove;
s23: placing positioning section steel, wherein the positioning section steel comprises first positioning section steel and second positioning section steel; the first positioning section steels are arranged in a direction perpendicular to the grooves, the number of the first positioning section steels is multiple, and the multiple first positioning section steels are arranged at intervals; the second positioning section steel is parallel to the direction of the groove, and the two second positioning section steel positions are respectively positioned on two sides of the groove.
3. The construction method of the mixing pile wall according to claim 2, wherein any two adjacent first positioning section steels and the side wall of the groove form a section steel falling abdicating space, and the abdicating space is provided with a section steel positioning clamp for realizing H-section steel positioning.
4. The method for constructing a mixing pile wall according to claim 1, wherein the step S3 specifically comprises the following steps:
s31: positioning a three-shaft mixing pile machine, wherein the verticality deviation of the three-shaft mixing pile machine is not more than 1/100;
s32: preparing cement slurry, wherein the water-cement ratio of the cement slurry is 1.5, and the cement slurry comprises the following components: 20% of cement and 2% of bentonite;
s33: and (5) stirring construction.
5. The mixing pile wall construction method according to claim 4, wherein the mixing construction of step S33 is performed according to a skip-trough double-hole complete-set double-mixing type connection construction.
6. The mixing pile wall construction method according to claim 4, wherein the mixing construction of the step S33 is performed by a one-side extrusion connection construction.
7. The method for constructing a mixing pile wall according to claim 1, wherein the step S4 specifically comprises the following steps:
s41: performing surface treatment, namely performing cleaning treatment on the H-shaped steel, and brushing an antifriction agent on the surface of the H-shaped steel after the cleaning treatment is finished;
s42: inserting and forming H-shaped steel, namely inserting the H-shaped steel into a mixing pile, and fixing the H-shaped steel and the positioning section steel by adopting channel steel;
s43: and recovering the H-shaped steel, and pulling up the H-shaped steel for recovery after the stirring pile wall is hardened for a period of time.
8. The mixing pile wall construction method according to claim 7, wherein the step S43 includes the following steps,
s431: isolating the H-shaped steel, and coating the exposed section of the H-shaped steel by adopting foamed plastic;
s432: constructing a ring beam;
s433: after the structural strength of the ring beam meets the design requirement, pulling out the H-shaped steel;
s434: and (3) filling cement grout, namely filling the corresponding position of the pulled H-shaped steel with 6-8% of cement grout.
9. The method for constructing a mixing pile wall according to claim 8, wherein the drawing out of the H-shaped steel comprises the following steps;
connecting H-shaped steel by using a chuck, wherein one section of the chuck is connected with the H-shaped steel, and the other end of the chuck is provided with a cross arm;
the oil jack is matched with the cross arm to realize the lifting of the H-shaped steel;
and after the H-shaped steel is lifted to a certain height, the connection relation between the chuck and the H-shaped steel is disassembled, and the wedge card of the drawing machine is matched with the oil top for drawing.
10. The mixing pile wall construction method according to claim 9, wherein a crane is used to connect the H-section steel during the extraction of the H-section steel.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101864765A (en) * | 2010-06-30 | 2010-10-20 | 东南大学 | Two-way stirring based SMW construction method and tri-axial stirring equipment |
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