CN112227382A - Double-row pile structure with water stopping function and construction method thereof - Google Patents
Double-row pile structure with water stopping function and construction method thereof Download PDFInfo
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- CN112227382A CN112227382A CN202011116286.1A CN202011116286A CN112227382A CN 112227382 A CN112227382 A CN 112227382A CN 202011116286 A CN202011116286 A CN 202011116286A CN 112227382 A CN112227382 A CN 112227382A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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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
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Abstract
The invention relates to the technical field of double-row pile supporting and discloses a double-row pile structure with a water stopping function and a construction method thereof. The invention comprises a front row of concrete cast-in-place piles, a concrete crown beam, a rear row of steel pipe piles and a waterproof curtain positioned between the concrete cast-in-place piles and the steel pipe piles, wherein the concrete cast-in-place piles are connected through the crown beam; the steel pipe piles are detachably connected through L-shaped connecting buckles, a locking assembly is arranged on the side wall of the concrete cast-in-place pile along the axial direction of the pile, and a grouting pipe is arranged between the locking assembly and the concrete cast-in-place pile; and a connecting short plate is arranged between the front and back opposite concrete cast-in-place piles and the steel pipe piles. The steel pipe pile is matched with the concrete pile, has excellent water stopping performance, is simple and efficient to construct, and can be disassembled and recycled in part of structures.
Description
Technical Field
The invention relates to the technical field of double-row pile supporting, in particular to a double-row pile structure with a water stopping function and a construction method thereof.
Background
The construction of the foundation pit is carried out in the dense area of the urban building, the stability of the foundation pit is ensured, the safety of the surrounding building is considered, the horizontal displacement and the settlement of the soil body around the foundation pit are limited by adopting a proper supporting scheme, and meanwhile, a water-stopping curtain or a dewatering well is arranged to control the underground water. The double-row pile supporting structure has high rigidity and high strength, can effectively ensure the safety of the foundation pit and surrounding buildings, and is widely applied to deep foundation pit engineering.
The traditional support mode of the double-row piles at present is that two rows of reinforced concrete piles with closer intervals are arranged on the periphery of a foundation pit, the two rows of piles are connected through cast-in-place connecting beams in the direction vertical to the foundation pit, the two rows of piles are connected through cast-in-place crown beams in the direction parallel to the foundation pit, the double-row piles and the piles form a lateral force resisting structure system with higher rigidity, the horizontal displacement of a soil body outside the foundation pit is resisted, and the safety of an adjacent building is protected. The supporting mode is formed by pouring concrete, the construction period is long, the process is complex, the concrete cannot be recycled, large material waste is easily caused, the water-stopping function is not realized, a water-stopping curtain or a dewatering well needs to be additionally arranged, the construction period is long, and the cost is high.
Disclosure of Invention
The invention provides a double-row pile structure with a water stopping function and a construction method thereof, wherein the double-row pile structure is matched with a steel pipe pile and a concrete pile, has excellent water stopping performance, is simple and efficient in construction, and has a part of structure which can be disassembled and recycled.
The technical problem to be solved is that: the traditional double-row pile structure is a concrete structure constructed at one time, has complex construction procedures and long construction period, can not be recycled, has serious material waste and does not have a water stopping function.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses a double-row pile structure with a water stopping function, which comprises a front row of concrete cast-in-place piles, a concrete crown beam, a rear row of steel pipe piles and a water stopping curtain positioned between the concrete cast-in-place piles and the steel pipe piles, wherein the concrete cast-in-place piles are connected through the crown beam; the method is characterized in that: the steel pipe piles are detachably connected through L-shaped connecting buckles, a locking assembly is arranged on the side wall of the concrete cast-in-place pile along the axial direction of the pile, and a grouting pipe is arranged between the locking assembly and the concrete cast-in-place pile; and a connecting short plate is arranged between the front and back opposite concrete cast-in-place piles and the steel pipe piles.
The double-row pile structure with the water stopping function comprises a connecting buckle plate and a buckle plate, wherein the connecting buckle plate is arranged on the outer side wall of the top of the steel pipe pile at the opposite positions and is arranged along the length direction of the steel pipe pile, the connecting buckle plate comprises the connecting plate and the buckle plate which are perpendicular to each other, the plate surface of the connecting plate is arranged along the diameter direction of the steel pipe pile, the connecting plates of the two connecting buckle plates are positioned in the same plane, and the inner side surfaces of the buckle plate are attached to the inner side surfaces of the corresponding buckle plates on the adjacent steel pipe pile.
The double-row pile structure with the water stopping function is characterized in that the locking port assembly is a U-shaped structure formed by enclosing a pair of oppositely arranged angle steels, and an installation groove is reserved between the two angle steels.
The double-row pile structure with the water stopping function is characterized in that the angle steel is arranged along the axial direction of the cast-in-place concrete pile, the length of the angle steel is not less than 1.5m, and the end part of a limb plate on one side of the angle steel is embedded in the cast-in-place concrete pile.
The double-row pile structure with the water stopping function is characterized in that a grout outlet of the grouting pipe penetrates through the locking assembly from top to bottom and then extends downwards to the position of the pile bottom along the axial direction of the concrete cast-in-place pile.
The double-row pile structure with the water stopping function is characterized in that the connecting short plate is a rectangular steel plate with the thickness not less than 6mm and is arranged along the axis direction of the steel pipe pile, the side vertical end face of one side is welded and fixed with the outer side wall of the steel pipe pile, and the side vertical edge of the opposite side extends into the mounting seam of the locking notch assembly and then is welded and fixed with the outer side wall of the grouting pipe.
The double-row pile structure with the water stopping function is further characterized in that the water stopping curtain is a soil body reinforced by grouting.
The invention discloses a construction method of a double-row pile structure with a water stopping function, which comprises the following steps:
step one, prefabricating in a factory: prefabricating the steel pipe pile and the locking notch assembly in a factory according to construction requirements, and conveying the steel pipe pile and the locking notch assembly to a construction site;
step two, front row pile construction: according to the construction design requirements, carrying out accurate measurement and positioning, determining the positions of the front pile row and the rear pile row, forming holes and pouring concrete;
step three, constructing the rear row of piles: the steel pipe pile is jacked into a soil layer, and the grouting pipe penetrates through the locking notch assembly and is placed to the bottom of the pile;
step four, constructing a waterproof curtain: grouting reinforcement is carried out between the concrete filling pile and the steel pipe pile through a grouting pipe, and a waterproof curtain is formed on the reinforced soil body;
step five, concrete crown beam construction: arranging a concrete crown beam at the top of the concrete cast-in-place pile, and casting and molding concrete;
step six, after the construction of the double-row pile supporting structure is completed, foundation pit excavation and main structure construction are carried out;
seventhly, backfilling the fertilizer tank after the main structure of the underground chamber part of the building is constructed;
step eight, recovering the steel pipe pile and the locking notch assembly;
and step nine, backfilling the graded sandstone and tamping.
The invention discloses a construction method of a double-row pile structure with a water stopping function, and further comprises the following concrete construction steps:
3.1, hoisting the steel pipe pile, and adjusting the angle and the position of the steel pipe pile to enable the plate surfaces of the connecting plates on two sides of the steel pipe pile to be arranged along the side line direction of the foundation pit;
3.2, penetrating the pipe head of the grouting pipe into the locking port assembly corresponding to the concrete cast-in-place pile;
3.3, dig the rig pore-forming soon, transfer the steel-pipe pile to the soil layer in, simultaneously, the slip casting pipe is along with the transfer of steel-pipe pile, and the laminating concrete bored concrete pile is progressively squeezed into in the stratum.
The invention discloses a construction method of a double-row pile structure with a water stopping function, and further comprises the following concrete construction steps:
4.1, connecting a grouting pump with a grouting pipe;
4.2, pouring the cement paste into the grouting pipe through a grouting pump, and gradually infiltrating the cement paste into the soil between the piles;
4.3, before the cement paste is solidified and hardened, drawing out the grouting pipe;
4.4, the mud clean slurry is condensed and hardened in the soil between the piles to form the waterproof curtain.
Compared with the prior art, the double-row pile structure with the water stopping function and the construction method thereof have the following beneficial effects:
the double-row pile structure with the water stopping function combines the disposable construction structure with the detachable structure by adopting the mode of combining the concrete cast-in-place pile and the steel pipe pile, and realizes the recycling of partial structures. The detachable and recyclable main body is a steel pipe pile part, adjacent steel pipe piles are locked through L-shaped connecting buckle buckles, and a detachable Z-shaped connecting structure is formed among the steel pipe piles, so that the steel pipe piles can be quickly connected into a whole, a connecting beam is formed in the process of driving the steel pipe piles into a soil layer in real time, a crown beam at the top of the traditional back row pile is replaced, the construction process and the field workload are greatly reduced, the construction difficulty is reduced, the construction efficiency is improved, the steel pipe piles are detachably connected, the detachment, recycling and reutilization are facilitated, the waste of materials is reduced, the construction cost is greatly reduced, and resources are saved.
The connecting short plate is connected with the opposite concrete cast-in-place pile and the steel pipe pile, and the connecting short plate is directly connected with the concrete cast-in-place pile along with the driving of the steel pipe pile, so that the connecting beam in the traditional double-row pile is replaced, the one-time in-place construction is realized, and the construction process and the workload are greatly reduced.
According to the invention, the fore-buried fore-shaft assembly arranged on the cast-in-place concrete pile can be inserted into the connecting short plate, so that the connection between the cast-in-place concrete pile and the steel pipe pile is realized, and the positioning and the fixing of the grouting pipe are convenient. The slip casting pipe carries out the slip casting to the soil body between the double row pile and consolidates, forms the stagnant water curtain, not only plays the effect of stagnant water, can effectively consolidate the soil body between the pile moreover, increases the firm in connection nature and the stability between the steel-pipe pile, reinforcing supporting construction's strut effect.
The double row pile structure with water stop function and the construction method thereof of the present invention will be further explained with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a double-row pile structure with a water stopping function according to the present invention;
FIG. 2 is a schematic structural view of a double row pile;
FIG. 3 is a top view of a double row of piles;
FIG. 4 is a detailed structural schematic diagram of the top of a single set of double row piles;
fig. 5 is a top view of a single set of two rows of stakes.
Reference numerals:
1-filling concrete into piles; 2-concrete crown beam; 3-steel pipe pile; 4-waterproof curtain; 5-connecting the buckle plate; 51-a connecting plate; 52-hasp plate; 6-a fore shaft assembly; 7-grouting pipe; 8-connecting short plates.
Detailed Description
As shown in fig. 1 to 5, the double-row pile structure with a water stopping function of the present invention includes a front row of cast-in-place concrete piles 1, a concrete crown beam 2, a rear row of steel pipe piles 3, and a water stopping curtain 4 located between the cast-in-place concrete piles 1 and the steel pipe piles 3, wherein the cast-in-place concrete piles 1 are connected by the crown beam.
The steel pipe pile comprises a steel pipe pile 3, L-shaped connecting buckles 5 and connecting buckles 52, wherein the L-shaped connecting buckles 5 matched with the hasps are respectively arranged at opposite positions on the outer side wall of the top of the steel pipe pile 3, the connecting buckles 5 are arranged along the length direction of the steel pipe pile 3, the length of the connecting buckles 5 is not shorter than 1.5m, the connecting buckles 51 and the hasps 52 are perpendicular to each other, the surface of the connecting plate 51 is arranged along the diameter direction of the steel pipe pile 3, and the connecting plates 51; the inner side surface of the hasp plate 52 is attached to the inner side surface of the hasp plate 52 corresponding to the adjacent steel pipe pile 3 to form a Z-shaped connecting piece, so that the adjacent steel pipe piles 3 are connected; the width of hasp board 52 is not less than 0.1m, connects the crown beam at back row pile top in the buckle 5 replaces traditional double row pile, effectively connects the steel-pipe pile 3 of back row as an organic whole, and the dismantlement of hasp formula is connected simultaneously, and the dismantlement and the recovery of the steel-pipe pile 3 of being convenient for are recycled.
Be provided with fore shaft subassembly 6 along the stake axial on the 1 lateral wall of bored concrete pile, fore shaft subassembly 6 encloses the U-shaped structure that closes and form for the angle steel by a pair of relative setting, the angle steel sets up along bored concrete pile 1's axial, length is not less than 1.5m, leave the mounting groove between two angle steels, the pre-buried setting of tip of angle steel side limb board is in bored concrete pile 1, be provided with slip casting pipe 7 between fore shaft subassembly 6 and bored concrete pile 1, slip casting pipe 7's play thick liquid mouth top-down passes behind fore shaft subassembly 6, along 1 axial downwardly extending of bored concrete pile to the position of pile bottom.
A connecting short plate 8 is arranged between the front concrete filling pile 1 and the rear concrete filling pile 3 which are opposite, the connecting short plate 8 is a rectangular steel plate with the thickness not less than 6mm and is arranged along the axial direction of the steel pipe pile 3, the side vertical end face of one side is welded and fixed with the outer side wall of the steel pipe pile 3, and the side vertical edge of the opposite side is welded and fixed with the outer side wall of the grouting pipe 7 after extending into the mounting seam of the locking notch component 6; the width of the mounting groove is adapted to the thickness of the connecting short plate 8.
The waterproof curtain 4 is a soil body after grouting reinforcement.
The invention discloses a construction method of a double-row pile structure with a water stopping function, which comprises the following steps:
step one, prefabricating in a factory: according to construction needs, prefabricating the steel pipe pile 3 and the locking notch assembly 6 in a factory, and conveying the steel pipe pile and the locking notch assembly to a construction site;
and welding and fixing the connecting buckle 5 and the connecting short plate 8 on the side wall of the steel pipe pile 3, and welding the grouting pipe 7 on the outer vertical surface of the connecting short plate 8.
Step two, front row pile construction: according to the construction design demand, carry out accurate measurement and location, the position of pile row around confirming, pore-forming and concrete pouring specifically include following construction steps:
2.1, forming holes by using a spiral drilling machine, wherein the aperture is 0.6-1.5 m, and the distance between the central axes of adjacent holes is not more than 2 times of the aperture;
2.2, hoisting a steel reinforcement cage in the drilled hole, arranging a locking notch assembly 6 at a designed position, and welding and fixing the locking notch assembly 6 and the steel reinforcement cage;
and 2.3, pouring concrete and maintaining to finish the construction of the cast-in-place concrete pile 1.
Step three, constructing the rear row of piles: the steel pipe pile 3 is jacked into a soil layer, a grouting pipe 7 penetrates through a locking notch assembly 6 and is placed to the bottom of the pile, and construction is carried out according to the following method;
3.1, hoisting the steel pipe pile 3, and adjusting the angle and the position of the steel pipe pile 3 to enable the plate surfaces of the connecting plates 51 on the two sides of the steel pipe pile 3 to be arranged along the side line direction of the foundation pit;
3.2, the head of the grouting pipe 7 penetrates through the locking notch assembly 6 of the corresponding concrete cast-in-place pile 1;
3.3, forming holes by a rotary drilling rig, and lowering the steel pipe pile 3 into the soil layer to ensure that the connecting short plate 8 smoothly slides into the mounting groove; meanwhile, the grouting pipe 7 is gradually driven into the stratum along with the downward placement of the steel pipe pile 3 and the attached concrete cast-in-place pile 1;
the slip casting pipe is not more than 100 mm's steel pipe for the diameter, and the top sets up for most advanced, can advance to the pile bottom construction position fast.
Step four, constructing a waterproof curtain 4: grouting reinforcement is carried out between the concrete cast-in-place pile 1 and the steel pipe pile 3 through the grouting pipe 7, a water-stop curtain 4 is formed by a soil body after reinforcement, the water-stop effect is achieved, meanwhile, the soil body between the piles is reinforced, and construction is carried out according to the following method:
4.1, the grouting pump is connected with the grouting pipe 7, so that a tight interface is ensured, and no slurry leakage occurs;
4.2, grouting the cement paste into the grouting pipe 7 through a grouting pump, wherein the cement paste gradually permeates into soil between piles, the water cement ratio of the cement paste is strictly controlled to be 0.4-0.45 in the grouting process, and parameters such as proper grouting pressure, flow rate, permeation time and the like are selected according to different stratums to ensure that the viscosity of the paste is controlled within the range of 80-90S, and the compressive strength of the cubic test block after 7d of the paste is sealed is 0.3-0.5 MPa;
4.3, before the cement paste is solidified and hardened, drawing out the grouting pipe 7;
4.4, the cement paste is solidified and hardened in the soil between the piles to form the waterproof curtain 4.
Step five, constructing the concrete crown beam 2: arranging a concrete crown beam 2 at the top of the concrete cast-in-place pile 1, and pouring and forming concrete, wherein the concrete crown beam 2 is arranged along the side line direction of the foundation pit, and the construction is specifically carried out according to the following method;
5.1, chiseling off a pile head after the construction of the concrete cast-in-place pile 1 is finished, and leaking longitudinal steel bars;
5.2, binding the crown beam steel bars, and binding the crown beam steel bars and the longitudinal steel bars of the cast-in-place concrete pile 1 together;
5.3, erecting a crown beam template and pouring concrete;
and 5.4, after the concrete strength grade reaches the design requirement, removing the template, and finishing the construction of the crown beam.
Step six, after the construction of the double-row pile supporting structure is completed, foundation pit excavation and main structure construction are carried out;
and excavating a soil layer on the inner side of the foundation pit, and constructing the main structure of the underground chamber part of the building.
And seventhly, backfilling the fertilizer tank after the main structure of the underground chamber part of the building is constructed.
Step eight, recovering the steel pipe pile 3, the connecting buckle 5, the connecting short plate 8 and the locking notch assembly 6;
and (3) sequentially pulling out the steel pipe pile 3, recovering the steel pipe pile 3, the connecting buckle 5 and the connecting short plate 8, cutting the locking notch assembly 6, and taking down and recovering for recycling.
Step nine, backfilling the graded sandstone and tamping;
and (3) backfilling graded gravel at the position of the original steel pipe pile 3, and tamping firmly to complete partial recovery of the double-row pile, so that the double-row pile can be reserved for next repeated reuse.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. Have double row pile structure of stagnant water function concurrently, including concrete bored concrete pile (1) of front bank, concrete crown beam (2), steel-pipe pile (3) of back row and lie in stagnant water curtain (4) between concrete bored concrete pile (1) and steel-pipe pile (3), connect its characterized in that through crown beam between concrete bored concrete pile (1): the steel pipe piles (3) are detachably connected through L-shaped connecting buckles (5), a locking assembly (6) is arranged on the side wall of the concrete cast-in-place pile (1) along the axial direction of the pile, and a grouting pipe (7) is arranged between the locking assembly (6) and the concrete cast-in-place pile (1); and a connecting short plate (8) is arranged between the front and back opposite concrete cast-in-place pile (1) and the steel pipe pile (3).
2. The double row pile structure with the water stopping function according to claim 1, wherein: relative position is provided with connection buckle (5) respectively on the lateral wall at steel-pipe pile (3) top, and the length direction setting of steel-pipe pile (3) is followed in connection buckle (5), including mutually perpendicular's connecting plate (51) and hasp board (52), the diameter direction setting of steel-pipe pile (3) is followed to the face of connecting plate (51), and connecting plate (51) of two connection buckle (5) are located the coplanar, and the medial surface of hasp board (52) and the medial surface laminating setting of the hasp board (52) that corresponds on adjacent steel-pipe pile (3).
3. The double row pile structure with the water stopping function according to claim 1, wherein: the locking notch assembly (6) is of a U-shaped structure formed by enclosing a pair of oppositely arranged angle steels, and an installation groove is reserved between the two angle steels.
4. The double row pile structure with the water stopping function according to claim 3, wherein: the angle steel is arranged along the axial direction of the cast-in-place concrete pile (1), the length of the angle steel is not less than 1.5m, and the end part of a limb plate on one side of the angle steel is pre-buried in the cast-in-place concrete pile (1).
5. The double row pile structure with the water stopping function according to claim 1, wherein: and a grout outlet of the grouting pipe (7) extends downwards to the position of the pile bottom along the axial direction of the concrete cast-in-place pile (1) after penetrating through the locking assembly (6) from top to bottom.
6. The double row pile structure with the water stopping function according to claim 3, wherein: the connecting short plate (8) is a rectangular steel plate with the thickness not less than 6mm and is arranged along the axis direction of the steel pipe pile (3), the side-standing end face of one side is welded and fixed with the outer side wall of the steel pipe pile (3), and the side-standing edge of the opposite side extends into the mounting seam of the locking notch assembly (6) and then is welded and fixed with the outer side wall of the grouting pipe (7).
7. The double row pile structure with the water stopping function according to claim 1, wherein: the waterproof curtain (4) is a soil body after grouting reinforcement.
8. The method for constructing a double row pile structure having a water stop function according to any one of claims 1 to 7, wherein: the method comprises the following steps:
step one, prefabricating in a factory: prefabricating the steel pipe pile (3) and the locking notch assembly (6) in a factory according to construction requirements, and conveying the steel pipe pile and the locking notch assembly to a construction site;
step two, front row pile construction: according to the construction design requirements, carrying out accurate measurement and positioning, determining the positions of the front pile row and the rear pile row, forming holes and pouring concrete;
step three, constructing the rear row of piles: the steel pipe pile (3) is jacked into a soil layer, and the grouting pipe (7) penetrates through the locking notch assembly (6) and is placed to the bottom of the pile;
step four, constructing a waterproof curtain (4): grouting reinforcement is carried out between the concrete cast-in-place pile (1) and the steel pipe pile (3) through a grouting pipe (7), and a waterproof curtain (4) is formed on the soil body after reinforcement;
step five, constructing the concrete crown beam (2): arranging a concrete crown beam (2) at the top of the concrete cast-in-place pile (1), and casting and molding concrete;
step six, after the construction of the double-row pile supporting structure is completed, foundation pit excavation and main structure construction are carried out;
seventhly, backfilling the fertilizer tank after the main structure of the underground chamber part of the building is constructed;
step eight, recovering the steel pipe pile (3) and the locking notch assembly (6);
and step nine, backfilling the graded sandstone and tamping.
9. The method of constructing a double row pile structure having a water stop function according to claim 8, wherein: the concrete construction steps of the third step are as follows:
3.1, hoisting the steel pipe pile (3), adjusting the angle and the position of the steel pipe pile (3) and arranging the plate surfaces of the connecting plates (51) on the two sides of the steel pipe pile (3) along the side line direction of the foundation pit;
3.2, a pipe head of the grouting pipe (7) penetrates through a locking port assembly (6) of the corresponding concrete cast-in-place pile (1);
3.3, dig rig pore-forming soon, transfer steel-pipe pile (3) to the soil layer in, simultaneously, slip casting pipe (7) are along with the transfer of steel-pipe pile (3), and laminating concrete bored concrete pile (1) is progressively squeezed into in the stratum.
10. The method of constructing a double row pile structure having a water stop function according to claim 8, wherein: the concrete construction steps of the fourth step are as follows:
4.1, connecting a grouting pump with a grouting pipe (7);
4.2, pouring the cement paste into the grouting pipe (7) through a grouting pump, wherein the cement paste gradually permeates into soil between piles;
4.3, before the cement paste is solidified and hardened, drawing out the grouting pipe (7);
4.4, the mud clean slurry is condensed and hardened in the soil between the piles to form the waterproof curtain (4).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942313A (en) * | 2021-01-26 | 2021-06-11 | 上海兴庚基础工程有限公司 | Cement-mixed soil-implanted prefabricated reinforced concrete pile enclosure wall and construction method thereof |
| CN114016514A (en) * | 2021-06-18 | 2022-02-08 | 中国建筑第二工程局有限公司 | Fabricated foundation pit support structure and construction method thereof |
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| CN114016514A (en) * | 2021-06-18 | 2022-02-08 | 中国建筑第二工程局有限公司 | Fabricated foundation pit support structure and construction method thereof |
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Application publication date: 20210115 |