CN112030947A - Construction method of T-shaped load-bearing underground continuous wall - Google Patents

Construction method of T-shaped load-bearing underground continuous wall Download PDF

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Publication number
CN112030947A
CN112030947A CN202010866295.6A CN202010866295A CN112030947A CN 112030947 A CN112030947 A CN 112030947A CN 202010866295 A CN202010866295 A CN 202010866295A CN 112030947 A CN112030947 A CN 112030947A
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China
Prior art keywords
shaped
wall
continuous wall
underground continuous
steel bar
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Pending
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CN202010866295.6A
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Chinese (zh)
Inventor
胡磊
赵继雄
王猜
陈俊峰
王连华
杨帅
王腾辉
郑健康
屠洁
廖少强
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Wuhan Anzhen Geotechnical Engineering Co ltd
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Wuhan Anzhen Geotechnical Engineering Co ltd
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Priority to CN202010866295.6A priority Critical patent/CN112030947A/en
Publication of CN112030947A publication Critical patent/CN112030947A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18Bulkheads or similar walls made solely of concrete in situ
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18Bulkheads or similar walls made solely of concrete in situ
    • E02D5/187Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints

Abstract

The application relates to a construction method of a T-shaped load-bearing underground continuous wall, which comprises the following steps: preparing before construction, manufacturing a guide wall, grooving, manufacturing a reinforcement cage, manufacturing a connecting piece, arranging the reinforcement cage, the connecting piece and a guide pipe, pouring a wall and the like, wherein a hidden column frame is additionally arranged inside the T-shaped bearing underground continuous wall, after the poured concrete is cured, the concrete is matched with the hidden column frame to form a hidden column structure, a T-shaped supporting part is additionally arranged outside the T-shaped bearing underground continuous wall, so that the T-shaped bearing underground continuous wall is effectively prevented from deviating or inclining, the shear resistance is obviously enhanced, and the T-shaped bearing underground continuous wall manufactured by the construction method has firmer structure and stronger bearing capacity.

Description

Construction method of T-shaped load-bearing underground continuous wall
Technical Field
The application relates to the technical field of design and construction of underground continuous walls, in particular to a construction method of a T-shaped load-bearing underground continuous wall.
Background
The underground continuous wall is a foundation engineering, and adopts a trenching machine on the ground, and under the condition of slurry wall protection, a long and narrow deep groove is excavated along the peripheral axis of the deep excavation engineering, after the groove is cleaned, a steel reinforcement cage is hung in the groove, then underwater concrete is poured by using a conduit method to construct a unit groove section, and the steps are carried out section by section, so that a continuous reinforced concrete wall is constructed underground to be used as a structure for intercepting water, preventing seepage, bearing and retaining water.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: at present, most underground continuous walls are simple in structure and only have common wall surface structures, and in some urban building projects, particularly under the condition that high-rise buildings exist on the ground, the common underground continuous walls are insufficient in structural strength and poor in bearing effect, so that improvement is needed.
Disclosure of Invention
In order to improve the structural strength and the bearing capacity of the underground continuous wall, the application provides a construction method of the T-shaped bearing underground continuous wall.
The application provides a construction method of a T-shaped bearing underground continuous wall, which adopts the following technical scheme:
a construction method of a T-shaped load-bearing underground continuous wall comprises the following steps:
s1, preparation before construction: leveling the field, measuring out a guide wall point by using a theodolite, and drawing out a guide wall line by using a steel ruler and lime;
s2, manufacturing a guide wall: digging a wall guide channel along a wall guide line by using an excavator, cleaning sundries in the wall guide channel, repairing and leveling the wall guide channel, binding a reinforcing mesh on the inner wall of the wall guide channel, erecting a wall guide template, pouring concrete into the wall guide template, and curing the concrete to form a wall guide;
s3, grooving: excavating a continuous wall groove between the guide walls, and taking out soil in the continuous wall groove by using a grab bucket machine, wherein the continuous wall groove comprises a plurality of T-shaped grooves which are linearly arranged;
s4, manufacturing a reinforcement cage: binding and welding a plurality of T-shaped steel bar frames by using steel bars to form a plurality of T-shaped steel bar frames, wherein the shapes of the T-shaped steel bar frames are consistent with the shapes of the T-shaped grooves, vertically arranged hidden column frames are fixed in the T-shaped steel bar frames, the tops of the hidden column frames are higher than the tops of the T-shaped steel bar frames, and the hidden column frames extend out of the upper surface of the T-shaped load-bearing underground continuous wall in the later period;
s5, manufacturing a connecting piece: welding a first connecting piece by using a steel plate, wherein the section of the first connecting piece is H-shaped and forms two first slots, the mutually close side ends of two adjacent T-shaped steel reinforcement frames are respectively inserted into the two first slots of the first connecting piece, and the first connecting piece and the T-shaped steel reinforcement frames are welded and fixed to form a first lifting body;
s6, lower cages, connectors and ducts: hoisting the first hoisting body by using hoisting equipment and placing the first hoisting body into the T-shaped groove, and slowly placing the grouting guide pipe into the T-shaped groove to ensure that a gap is reserved between the bottom of the grouting guide pipe and the bottom of the T-shaped groove;
s7, pouring the wall: and pouring concrete into the interior of the continuous wall groove through the grouting guide pipe, and forming the T-shaped load-bearing underground continuous wall after the concrete is cured.
By adopting the technical scheme, compared with the common underground continuous wall, the T-shaped bearing underground continuous wall is additionally provided with the hidden column frame, after the poured concrete is cured, the concrete is matched with the hidden column frame to form a hidden column structure, the internal structural strength of the T-shaped bearing underground continuous wall is obviously enhanced, the top of the hidden column frame extends out of the upper surface of the T-shaped bearing underground continuous wall and is conveniently connected with external reinforcing steel bars, so that a supporting reinforcing column is conveniently poured at the top of the hidden column in the later period, the bearing effect of the T-shaped bearing underground continuous wall is further improved, a T-shaped supporting part is additionally arranged outside the T-shaped bearing underground continuous wall, the T-shaped bearing underground continuous wall is effectively prevented from shifting or inclining, and the shearing resistance is obviously enhanced; generally, the T-shaped load-bearing underground continuous wall manufactured by the construction method is firmer in structure and stronger in load-bearing capacity.
Preferably, in the step S3, the continuous wall slot further includes a linear slot, and the linear slot is communicated with the T-shaped slot at the side edge;
in the step S3, a plurality of steel bar frames are formed by binding and welding steel bars, a hidden column frame which is vertically arranged is fixed in each steel bar frame, the top of each hidden column frame is higher than the top of each steel bar frame, and the top of each hidden column frame extends out of the upper surface of the T-shaped load-bearing underground continuous wall in the later period;
in the step S5, a second connector is welded by a steel plate, the second connector has an H-shaped cross section and forms two second slots, the adjacent two side ends of the strip-shaped steel frames are respectively inserted into the two second slots of the second connector, the second connector and the strip-shaped steel frames are welded and fixed to form a second lifting body,
in step S6, the second lifting body is lifted by the lifting device and placed in the linear groove, and the grouting guide pipe is slowly placed in the linear groove with a gap left between the bottom of the grouting guide pipe and the bottom of the linear groove.
By adopting the technical scheme, the hidden column frame strengthens the structural strength of the T-shaped steel bar frame and also strengthens the structural strength of the strip-shaped steel bar frame, and then the T-shaped steel bar frame and the strip-shaped steel bar frame are pre-embedded in the concrete wall body, so that the whole T-shaped load-bearing underground continuous wall forms two parts of a T-shaped main wall body and an auxiliary wall body, and the auxiliary wall body plays an auxiliary load-bearing role on the T-shaped main wall body, thereby the load-bearing capacity of the T-shaped load-bearing underground continuous wall is better.
Preferably, in step S3, oblique reinforcing bars are welded and fixed in both the T-shaped reinforcing bar frame and the strip-shaped reinforcing bar frame, and the oblique reinforcing bars penetrate through the hidden column frame in an oblique manner.
Through adopting above-mentioned technical scheme, the reinforcing bar to one side self has certain structural strength, can further strengthen the structural strength of T shape steel reinforcement frame and strip steel reinforcement frame, and the reinforcing bar to one side has the supporting role to T shape steel reinforcement frame, strip steel reinforcement frame and the dark post frame of frame type in addition, makes the three be difficult to sunken to the centre, and the structure is more stable and firm.
Preferably, the concealed column frame comprises a circle of vertical steel bars and a plurality of steel bar rings, the vertical steel bars and the steel bar rings are arranged in a rectangular shape, the vertical steel bars and the steel bar rings are fixed through wire binding or welding, and the steel bar rings are arranged at intervals up and down.
Through adopting above-mentioned technical scheme, a plurality of reinforcing bars ring and round vertical reinforcement all have better structural strength, can have better reinforcing effect to T shape reinforcing bar frame and strip reinforcing bar frame, and a plurality of reinforcing bars ring is tight the back with round vertical reinforcement cramp, connects into the scattered vertical reinforcement of round into the better steel reinforcement cage of wholeness, makes the structural strength of whole hidden column frame better, has further strengthened the structural stability and the fastness of T shape reinforcing bar frame and strip reinforcing bar frame.
Preferably, the top of the vertical steel bar is provided with an external thread and the thread is assembled with a thread sleeve which is used for connecting the steel bar in the external support reinforcing column.
By adopting the technical scheme, the top of the vertical reinforcing steel bar protrudes out of the upper surface of the T-shaped bearing underground continuous wall, so that the external reinforcing steel bar can be further connected through the threaded sleeve according to the actual construction bearing requirement, concrete is poured on the basis of the connected external reinforcing steel bar, an external supporting reinforcing column is formed, the external supporting reinforcing column and the hidden column are combined together, and the structural strength and the structural stability of the T-shaped bearing underground continuous wall are further enhanced.
Preferably, the width of the linear groove is smaller than that of the T-shaped groove, and the width of the strip-shaped reinforcement frame is smaller than that of the T-shaped reinforcement frame.
By adopting the technical scheme, the thickness of the wall body poured in the T-shaped groove is thicker than that of the wall body poured in the linear groove, so that the construction cost is greatly saved on the basis of not influencing the structural strength of the whole T-shaped bearing underground continuous wall.
Preferably, in the step S5, the third connecting member is welded by a steel plate,
the third connecting piece is including being rectangular banding well core plate, well core plate width direction's both ends are provided with end panel and first curb plate respectively perpendicularly, well core plate perpendicular to on the central line of end panel width direction, first curb plate is located well core plate one side, well core plate is kept away from one side of first curb plate is provided with the second curb plate perpendicularly, the end panel first curb plate with the second curb plate all is parallel to each other and all follows well core plate's length direction sets up, be formed with first installation clearance between end panel and the first curb plate, one a side of T shape steel reinforcement frame is fixed in the first installation clearance, be formed with the second installation clearance between end panel and the second curb plate, one a side of strip steel reinforcement frame is fixed in the second installation clearance.
Through adopting above-mentioned technical scheme, the width in first installation clearance and second installation clearance is different, so in actual work progress, can construct out the diaphragm wall of different thickness through the third connecting piece, on the basis that does not influence the structural strength of whole T shape bearing underground continuous wall, saved construction cost greatly, above-mentioned structural design's third connecting piece moreover, sound construction is favorable to corresponding strip steel reinforcement frame and T shape steel reinforcement frame installation fixed.
Preferably, the distance of the hidden column frame penetrating into the T-shaped load-bearing underground continuous wall is 80-100% of the height of the T-shaped load-bearing underground continuous wall.
Through adopting above-mentioned technical scheme, the majority of hidden column frame all is fixed in T shape reinforcing bar frame and strip reinforcing bar frame, can furthest strengthen the structural strength of T shape reinforcing bar frame and strip reinforcing bar frame, and the structural strength of this bearing underground continuous wall that concreting and form in T shape reinforcing bar frame and strip reinforcing bar frame is better.
Preferably, in step S2, after the concrete is poured, the water stop steel plates are inserted into the interlayers at both sides of the guide wall, and half of the water stop steel plates are inserted into the guide wall.
By adopting the technical scheme, the anti-seepage and waterproof effects of the guide wall are better by adding the water stop steel plate, so that the later-stage pouring forming of the underground continuous wall is more facilitated, and the construction is more convenient.
Preferably, in the above step S3, the wall brusher is placed in the continuous wall trough, the inner side wall of the continuous wall trough is cleaned, and slurry is prepared by which the sludge at the bottom of the continuous wall trough is removed.
Through adopting above-mentioned technical scheme, clear away the inside in diaphragm wall groove cleaner, can ensure that the fashioned wall body of later stage pouring is more complete, and structural strength is higher, and the quality is better, and the bearing effect is better.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the T-shaped bearing underground continuous wall is characterized in that the built-in column frame is additionally arranged inside the T-shaped bearing underground continuous wall, after the poured concrete is cured, the concrete is matched with the built-in column frame to form a built-in column structure, the T-shaped supporting part is additionally arranged outside the T-shaped bearing underground continuous wall, the T-shaped bearing underground continuous wall is effectively prevented from shifting or inclining, the shearing resistance is obviously enhanced, the T-shaped bearing underground continuous wall prepared by the construction method is firmer in structure and stronger in bearing capacity;
2. the width in first installation clearance and second installation clearance is different, so in actual work progress, can construct out the diaphragm wall of different thickness through the third connecting piece, on the basis that does not influence the structural strength of whole T shape bearing underground continuous wall, saved construction cost greatly, above-mentioned structural design's third connecting piece, sound construction is favorable to corresponding strip steel reinforcement frame and T shape steel reinforcement frame installation fixed moreover.
Drawings
Fig. 1 is a schematic flow chart of a construction method according to an embodiment of the present application.
Fig. 2 is a schematic structural view of a continuous wall groove and a guide wall according to an embodiment of the present application.
Fig. 3 is a schematic view of a connection relationship between a T-shaped steel frame, a hidden column frame and a strip-shaped steel frame according to an embodiment of the present application.
Fig. 4 is an enlarged view at a in fig. 3.
Fig. 5 is an enlarged view at B in fig. 3.
Fig. 6 is a schematic structural view of a third connecting member according to an embodiment of the present application.
Fig. 7 is a structural schematic view of the obtained T-shaped load-bearing underground continuous wall of the embodiment of the present application.
Description of reference numerals: 1. a guide wall; 2. a continuous wall groove; 21. a T-shaped slot; 22. a linear groove; 3. a T-shaped reinforcement frame; 4. a hidden column frame; 41. erecting steel bars; 42. a reinforcing bar ring; 43. a threaded sleeve; 5. a first connecting member; 6. a strip-shaped steel bar frame; 7. a second connecting member; 8. oblique reinforcing steel bars; 9. a third connecting member; 91. a center plate; 92. an end panel; 93. a first side plate; 94. a second side plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
The embodiment of the application discloses a construction method of a T-shaped load-bearing underground continuous wall. Referring to fig. 1, the construction method includes the steps of: preparing S1 before construction, manufacturing a guide wall S2, forming a groove S3, manufacturing a reinforcement cage S4, manufacturing a connecting piece S5, putting the reinforcement cage, the connecting piece and a guide pipe S6, and pouring a wall S8.
Referring to fig. 1 and 2, preparation before construction S1: and (4) leveling the field, measuring 1 point of the guide wall by using a theodolite, and drawing a guide wall line by using a steel ruler and lime.
Referring to fig. 1 and 2, a guide wall S2 is manufactured: digging a guide wall ditch along a guide wall line by using an excavator, cleaning sundries in the guide wall ditch, repairing and leveling the guide wall ditch, binding a reinforcing mesh on the inner wall of the guide wall ditch, erecting a guide wall template, pouring concrete into the guide wall template, inserting a water stop steel plate into interlayers at two sides of the guide wall 1, and forming the guide wall 1 after the concrete is cured (half of the water stop steel plate is inserted into the guide wall 1).
As shown in fig. 1 and 2, the groove S3: excavating continuous wall grooves 2 between guide walls 1, taking out soil in the continuous wall grooves 2 by using a grab bucket machine, wherein the continuous wall grooves 2 comprise a plurality of T-shaped grooves 21 and linear grooves 22 which are arranged in a linear mode, the linear grooves 22 are communicated with the T-shaped grooves 21 positioned on the side edges, placing a wall brushing device in the continuous wall grooves 2, cleaning the inner side walls of the continuous wall grooves 2, preparing slurry, and removing sediments at the bottoms of the continuous wall grooves 2 through the slurry. The width of the straight line groove 22 is smaller than that of the T-shaped groove 21, and the width of the strip-shaped steel reinforcement frame 6 is smaller than that of the T-shaped steel reinforcement frame 3.
And (3) manufacturing a reinforcement cage S4 by combining the steps shown in fig. 2 and 3: bind welding forming out a plurality of T shape steel reinforcement frame 3 and a plurality of strip steel reinforcement frame 6 with the reinforcing bar, 6 internal fixation of strip steel reinforcement frame has vertical arrangement's hidden post frame 4, the top of hidden post frame 4 is higher than the top and the later stage of strip steel reinforcement frame 6 and stretches out the upper surface of this T shape bearing underground continuous wall, the shape of T shape steel reinforcement frame 3 is unanimous with the shape of T-slot 21, the T shape steel reinforcement frame 3 internal fixation has vertical arrangement's hidden post frame 4, the top of hidden post frame 4 is higher than the top and the later stage of T shape steel reinforcement frame 3 and stretches out the upper surface of this T shape bearing underground continuous wall. The distance of the hidden column frame 4 penetrating into the T-shaped load-bearing underground continuous wall is 80-100% of the height of the T-shaped load-bearing underground continuous wall.
The hidden column frame 4 comprises a circle of rectangular vertical steel bars 41 and a plurality of steel bar rings 42, the vertical steel bars 41 and the steel bar rings 42 are fixed by wire bonding or welding, and the plurality of steel bar rings 42 are arranged at intervals up and down. The top of the vertical steel bars 41 is provided with external threads and the threads are assembled with threaded sleeves 43, and the threaded sleeves 43 are used for connecting steel bars in the external support reinforcing column. Oblique steel bars 8 are welded and fixed in the T-shaped steel bar frames 3 and the strip-shaped steel bar frames 6, and the oblique steel bars 8 penetrate through the hidden column frame 4 in an oblique mode.
As shown in fig. 2 and 3, the connector S5 is made: welding a first connecting piece 5, a second connecting piece 7 and a third connecting piece 9 by using a steel plate, wherein the section of the first connecting piece 5 is H-shaped and forms two first slots, the mutually close side ends of two adjacent T-shaped steel bar frames 3 are respectively inserted into the two first slots of the first connecting piece 5, and the first connecting piece 5 and the T-shaped steel bar frames 3 are welded and fixed to form a first lifting body; the cross section of the second connecting piece 7 is H-shaped and forms two second slots, the side ends of two adjacent strip-shaped steel bar frames 6 close to each other are respectively inserted into the two second slots of the second connecting piece 7, and the second connecting piece 7 and the strip-shaped steel bar frames 6 are welded and fixed to form a second lifting body.
Referring to fig. 3 and 6, the third connector 9 includes a rectangular strip-shaped central plate 91, two ends of the central plate 91 in the width direction are respectively and vertically provided with an end plate 92 and a first side plate 93, the central plate 91 is perpendicular to a center line of the end plate 92 in the width direction, the first side plate 93 is located on one side of the central plate 91, which is far away from the first side plate 93, is vertically provided with a second side plate 94, the end plate 92, the first side plate 93 and the second side plate 94 are all parallel to each other and all arranged along the length direction of the central plate 91, a first installation gap is formed between the end plate 92 and the first side plate 93, one side of a T-shaped steel bar frame 3 is fixed in the first installation gap, a second installation gap is formed between the end plate 92 and the second side plate 94, and one side of.
As shown in fig. 3 and 5, the lower cage, connectors and ducts S6: hoisting the first hoisting body by using hoisting equipment and placing the first hoisting body into the T-shaped groove 21, and slowly placing the grouting guide pipe into the T-shaped groove 21 to ensure that a gap is reserved between the bottom of the grouting guide pipe and the bottom of the T-shaped groove 21; and hoisting the second hoisting body by using hoisting equipment and placing the second hoisting body into the linear groove 22, and slowly placing the grouting guide pipe into the linear groove 22 so that a gap is reserved between the bottom of the grouting guide pipe and the bottom of the linear groove 22.
As shown in fig. 1 and 7, the wall is poured S7: concrete is poured into the interior of the continuous wall groove 2 through the grouting guide pipe, and the T-shaped load-bearing underground continuous wall is formed after the concrete is solidified.
The implementation principle of the construction method of the T-shaped load-bearing underground continuous wall in the embodiment of the application is as follows: compared with the common underground continuous wall, the built-in column frame 4 is additionally arranged inside the T-shaped bearing underground continuous wall, after the poured concrete is cured, the concrete is matched with the built-in column frame 4 to form a built-in column structure, the internal structural strength of the T-shaped bearing underground continuous wall is obviously enhanced, the top of the built-in column frame 4 extends out of the upper surface of the T-shaped bearing underground continuous wall and is conveniently connected with external reinforcing steel bars, so that a supporting reinforcing column is conveniently poured at the top of the built-in column in the later period, the bearing effect of the T-shaped bearing underground continuous wall is further improved, a T-shaped supporting part is additionally arranged outside the T-shaped bearing underground continuous wall, the T-shaped bearing underground continuous wall is effectively prevented from shifting or inclining, and the shear resistance is obviously enhanced; generally, the T-shaped load-bearing underground continuous wall manufactured by the construction method is firmer in structure and stronger in load-bearing capacity.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A construction method of a T-shaped load-bearing underground continuous wall is characterized by comprising the following steps: the method comprises the following steps:
s1, preparation before construction: leveling the field, then measuring the points of the guide wall (1) by using a theodolite, and drawing guide wall lines by using a steel ruler and lime;
s2, manufacturing a guide wall: digging a wall guide channel along a wall guide line by using an excavator, cleaning sundries in the wall guide channel, repairing and leveling the wall guide channel, binding a reinforcing mesh on the inner wall of the wall guide channel, erecting a wall guide template, pouring concrete into the wall guide template, and curing the concrete to form a wall guide (1);
s3, grooving: excavating continuous wall grooves (2) between the guide walls (1), taking out soil in the continuous wall grooves (2) by using a grab machine, wherein the continuous wall grooves (2) comprise a plurality of T-shaped grooves (21) which are linearly arranged;
s4, manufacturing a reinforcement cage: binding and welding a plurality of T-shaped steel bar frames (3) by using steel bars to form, wherein the shapes of the T-shaped steel bar frames (3) are consistent with the shapes of the T-shaped grooves (21), vertically-arranged hidden column frames (4) are fixed in the T-shaped steel bar frames (3), the tops of the hidden column frames (4) are higher than the tops of the T-shaped steel bar frames (3), and the hidden column frames extend out of the upper surface of the T-shaped bearing underground continuous wall in the later period;
s5, manufacturing a connecting piece: welding a first connecting piece (5) by using a steel plate, wherein the section of the first connecting piece (5) is H-shaped and forms two first slots, the side ends, close to each other, of two adjacent T-shaped steel bar frames (3) are respectively inserted into the two first slots of the first connecting piece (5), and the first connecting piece (5) and the T-shaped steel bar frames (3) are welded and fixed to form a first lifting body;
s6, lower cages, connectors and ducts: hoisting the first hoisting body by using hoisting equipment and placing the first hoisting body into the T-shaped groove (21), and slowly placing the grouting guide pipe into the T-shaped groove (21) to ensure that a gap is reserved between the bottom of the grouting guide pipe and the bottom of the T-shaped groove (21);
s7, pouring the wall: concrete is poured into the interior of the continuous wall groove (2) through the grouting guide pipe, and the T-shaped load-bearing underground continuous wall is formed after the concrete is cured.
2. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 1, wherein: in the step S3, the continuous wall slot (2) further comprises a straight slot (22), and the straight slot (22) is communicated with the T-shaped slot (21) at the side edge;
in the step S3, a plurality of bar-shaped steel bar frames (6) are formed by binding and welding steel bars, a hidden column frame (4) which is vertically arranged is fixed in each bar-shaped steel bar frame (6), the top of each hidden column frame (4) is higher than the top of each bar-shaped steel bar frame (6), and the top of each hidden column frame (4) extends out of the upper surface of the T-shaped load-bearing underground continuous wall in the later period;
in the step S5, a second connector (7) is welded by using a steel plate, the section of the second connector (7) is H-shaped and forms two second slots, the side ends of two adjacent steel bar frames (6) are respectively inserted into the two second slots of the second connector (7), and the second connector (7) and the steel bar frames (6) are welded and fixed to form a second lifting body,
in the step S6, the second hoisting member is hoisted by the hoisting means and placed in the linear groove (22), and the grouting pipe is slowly placed in the linear groove (22) with a gap left between the bottom of the grouting pipe and the bottom of the linear groove (22).
3. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 2, wherein: in the step S3, oblique steel bars (8) are welded and fixed in both the T-shaped steel bar frame (3) and the strip-shaped steel bar frame (6), and the oblique steel bars (8) penetrate through the hidden column frame (4) in an oblique manner.
4. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 2, wherein: the hidden column frame (4) comprises a circle of rectangular vertical steel bars (41) and a plurality of steel bar rings (42), the vertical steel bars (41) and the steel bar rings (42) are bound and fixed or welded through iron wires, and the steel bar rings (42) are arranged at intervals up and down.
5. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 4, wherein: the top of the vertical steel bar (41) is provided with external threads, the threads are assembled with a thread sleeve (43), and the thread sleeve (43) is used for connecting steel bars in an external support reinforcing column.
6. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 2, wherein: the width of the linear groove (22) is smaller than that of the T-shaped groove (21), and the width of the strip-shaped steel bar frame (6) is smaller than that of the T-shaped steel bar frame (3).
7. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 6, wherein: in the above step S5, the third connecting member (9) is welded out of a steel plate,
the third connecting piece (9) comprises a rectangular strip-shaped central plate (91), end plates (92) and a first side plate (93) are vertically arranged at two ends of the central plate (91) in the width direction respectively, the central plate (91) is perpendicular to the central line of the end plates (92) in the width direction, the first side plate (93) is located on one side of the central plate (91), a second side plate (94) is vertically arranged on one side, away from the first side plate (93), of the central plate (91), the end plates (92), the first side plate (93) and the second side plate (94) are all parallel to each other and are all arranged along the length direction of the central plate (91), a first mounting gap is formed between the end plates (92) and the first side plate (93), one side edge of the T-shaped steel bar frame (3) is fixed in the first mounting gap, and a second mounting gap is formed between the end plates (92) and the second side plate (94), one side edge of the strip-shaped steel bar frame (6) is fixed in the second mounting gap.
8. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 1, wherein: the distance of the hidden column frame (4) penetrating into the T-shaped load-bearing underground continuous wall is 80-100% of the height of the T-shaped load-bearing underground continuous wall.
9. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 1, wherein: in the step S2, after the concrete is poured, the water-stop steel plates are inserted into the interlayers on both sides of the guide wall (1), and half of the water-stop steel plates are inserted into the guide wall (1).
10. The construction method of the T-shaped load-bearing underground continuous wall as claimed in claim 1, wherein: in the above step S3, the wall brusher is placed in the continuous wall trough (2), the inner side wall of the continuous wall trough (2) is cleaned, and slurry is prepared by which the sludge at the bottom of the continuous wall trough (2) is cleaned.
CN202010866295.6A 2020-08-25 2020-08-25 Construction method of T-shaped load-bearing underground continuous wall Pending CN112030947A (en)

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CN112726572A (en) * 2020-12-25 2021-04-30 上海建工二建集团有限公司 Floor wall inserted stiffening column structure and mounting method thereof
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