CN109972630A - A kind of foundation pit enclosure structure and its construction method of the assembly of PC component - Google Patents
A kind of foundation pit enclosure structure and its construction method of the assembly of PC component Download PDFInfo
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- CN109972630A CN109972630A CN201910273926.0A CN201910273926A CN109972630A CN 109972630 A CN109972630 A CN 109972630A CN 201910273926 A CN201910273926 A CN 201910273926A CN 109972630 A CN109972630 A CN 109972630A
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- prefabricated
- sheet pile
- crown beam
- prefabricated sheet
- foundation pit
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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
-
- 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
- E02D19/185—Joints between sheets constituting the sealing aprons
-
- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
-
- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
- E02D5/105—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete of prestressed concrete
-
- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
- E02D5/12—Locking forms; Edge joints; Pile crossings; Branch pieces
-
- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/14—Sealing joints between adjacent sheet piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Composite Materials (AREA)
- Chemical & Material Sciences (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses the foundation pit enclosure structures and its construction method of a kind of assembly of PC component, the foundation pit enclosure structure of this PC component assembly is made of prefabricated sheet pile and rectangle crown beam, prefabricated sheet pile is prestressed high-strength reinforced concrete member, and section configuration is divided into three kinds of long wing T shape, empty stomach short limb T shape and solid T shape on an empty stomach；Prefabricated sheet pile along its length spreading using every reinforcing bar etc. strong mechanical connecting joint, the asphalt mixtures modified by epoxy resin resin fill of concrete surface and connector internal clearance fluidised form simultaneously solidify；Rectangle crown beam is to reserve the armored concrete crown beam in prefabricated sheet pile insertion hole；Method for implantation is to be divided into three kinds according to the feature on stratum and the outer dimension of sheet pile, the first is implanted directly into the self-solidifying stream modeling soil body, and second is that machinery is pressed into Soft Soil Layer, the third is sunk in the rectangular channel of deep gouge machinery excavation；Prefabricated crown beam is set at the top of prefabricated sheet pile or cast-in-place crown beam connects together, forms overall structure；The foundation pit enclosure structure being assembled in this way has the social value of green, environmental protection and energy-saving and emission-reduction, while can reduce cost and shorten the construction period, and has great economic value.
Description
Technical field
The present invention relates to technical field of civil engineering, the deep footing groove enclosing structure that specifically a kind of fashioned iron assembles.
Background technique
Campshed or diaphragm wall building enclosure in base pit engineering, at present frequently with H profile steel, steel-pipe pile, PHC tubular pole and prefabricated
Rectangular pile, with it, construction is quick, does not generate the advantages that mud contamination, reaches extensive use in foundation pit enclosure structure.But H-type
The geometric dimension of steel is smaller, the bending resistance of PHC tubular pole or PRC tubular pole and rectangular pile is lower, what the bump joint of welding was born
Shearing resistance and bending resistance are very low, to limit application of this kind of building enclosure form in larger soil pressure base pit engineering.Its
Outside, influence of the foundation pit secondary deformation to surrounding enviroment caused by H profile steel and steel-pipe pile recycle has had resulted in a lot of safety accidents.Circle
Shape pile for prestressed pipe is mainly used for pressure-bearing pile foundation, and anti-bending bearing capacity is low, and high-strength concrete pile body and supporting construction
Connection is also compared with hang-up.Furthermore when bearing horizontal load effect, section form has first for circular configuration and rectangular configuration
The irrationality of nature, will cause the bending resistance of the waste of biggish increased costs and material, especially pile joint, shearing strength compared with
It is low, the weak link of connection is caused, the safety of supporting is caused to reduce.H-type section is obtained with its reasonable bending resistant section
The approval of engineering circles, but the presence for the factors such as horizontal rigidity is lower, and on-site connection joint quality is difficult to ensure, to the level of foundation pit
Deformation control is unfavorable.As underground space development area is big, it is deep to excavate, existing prefabricated pile building enclosure has been unable to meet engineering
Needs.
Currently, the prefabricated sheet pile in the I-shaped cross-section employed in foundation pit enclosure structure, rectangle sheet pile and hollowcore precast wall,
Most of still prefabricated at the construction field (site), quality is difficult to ensure.In addition, the length of this kind of prefabricated sheet pile or wall is by excavation of foundation pit depth
Degree require determine, do not form calibrated length and high-strength quick connector, cause it is prefabricated, transport and lift it is difficult, increase
Increasing amount construction cost.Since the length of single sheet pile is longer, weight is larger, and transport and hoisting cost are high, in addition the reality in section
Body rate is high, and casting plasma discharge amount is big when implantation, and the reasons such as construction and installation difficulty limit its popularization and application.
Therefore, engineering circles need to find a kind of section it is reasonable it is prefabricated go along with sb. to guard him sheet pile and hollow subterranean wall, biography can be overcome
System goes along with sb. to guard him defect existing for sheet pile and diaphram wall, and can reduce cost, accelerates speed of application, protects our environment, real
Existing civilized construction.
Summary of the invention
Technical problem to be solved by the present invention lies in, overcome existing prefabricated sheet pile and prefabricated subterranean wall dead load big,
Stress is unreasonable, long construction period, the difficulty and high cost of construction and transport and lifting are insufficient, provides a kind of novel prefabricated
Sheet pilebraced cuts structure and its construction method.
In order to achieve the above objectives, this patent the technical solution adopted is that:
The foundation pit enclosure structure of the PC component assembly is made of prefabricated sheet pile and rectangle crown beam；Prefabricated sheet pile is pre-
Stress high strength RC component, stress main reinforcement are high tensile reinforcement, and strength grade of concrete is greater than C50, and section configuration is sky
Three kinds of the long wing T shape of abdomen, empty stomach short limb T shape and solid T shape；
The empty stomach prefabricated sheet pile of short limb T shape and the long prefabricated sheet pile of wing T shape of empty stomach, separate type is implanted in solidified earth,
Form campshed building enclosure；
The prefabricated sheet pile of the long wing T shape of the empty stomach and the empty stomach prefabricated sheet pile of short limb T shape are formed between the long wing in adjacent two sides
One dovetail groove is embedded in the solid prefabricated sheet pile of T shape corresponding with this dovetail groove size, can be mutually twisted adjacent two sheet piles
Together, continuous wall building enclosure is formed；
The rectangle crown beam is to reserve the armored concrete crown beam in prefabricated sheet pile insertion hole, and the preformed hole in crown beam is simultaneously
Pilot hole as the insertion of prefabricated sheet pile；
It is integral in order to contact prefabricated sheet pile, cast-in-place crown beam can also be set at the top of prefabricated sheet pile and connect one
It rises, is combined into overall structure；
The spreading method of the prefabricated sheet pile is construction site spreading, when prefabricated sheet pile is implanted to top far from aperture 1.2
When~1.5 meters of positions, fixes the prefabricated sheet pile of the section and pour into grouting material into joint face and hole, a section prefabricated board under handling
Stake is directed at connecting hole, the screw lock connector installed in the prefabricated sheet pile lower end surface connecting hole of a upper section is inserted into the hole that need to be connected
It is interior and compress.
The abdominal cavity template that the prefabricated sheet pile pours generates formwork active force formwork erection using air bag pressurization, and when demoulding first releases
It deflates and presses, then remove abdominal cavity template.
The construction method of the prefabricated sheet pile is to be divided into three kinds according to the intensity on stratum and the outer dimension of sheet pile, first
Kind is directly inserted into the self-solidifying fluidised form soil body, and second is that machinery is pressed into Soft Soil Layer, the third is to sink to mud shield
In the rectangular channel of wall, foundation pit enclosure structure is formed；
Connection between the prefabricated sheet pile and crown beam or purlin, waist rail and underground structure is connected using embedded nut
The anchoring of anchor bar method；
The prefabricated sheet pile arranges two kinds of arrangements in separate type arrangement and continous way along foundation pit enclosure boundary line；
Gap between two prefabricated sheet piles is to be filled by solidified earth or filled by being inserted into prefabricated tubular pole or square pile in solidified earth；
Solidified earth is formed by mixing pile or Construction Technology of Jet Grouting Piles, connects into continuous wall with prefabricated sheet pile；
The self-solidifying fluidised form soil body is that the undisturbed soil in foundation pit enclosure structure position is mixed through whirl spraying, stirring or drilling displacement
Enter soil-cement body, the hardening soil body, cement mortar body or self-solidifying slurry body that curing agent is mixed to form, forms continuous piling wall body or row
Pile body, section are cylindrical, cylinder occlusion shape or rectangle.
The prefabricated crown beam is reinforced concrete member, and it is disconnected that combination piling wall is distributed in rectangular in cross-section on the face of Liangping
Face shape, and run through the mounting hole of beam body, prefabricated sheet pile is inserted in place by mounting hole, and the mounting hole in prefabricated crown beam is simultaneously
As the pilot hole of prefabricated sheet pile, prefabricated board stake top face is higher than plane 0.5m or more in crown beam, mounting hole and prefabricated sheet pile it
Between gap in fill real concrete；Prefabricated crown beam forms entirety by both ends jointing, and joint form is joggle；In connector portions
Position connection reinforcement component is made by fashioned iron.
The mounting hole of prefabricated sheet pile is reserved in the prefabricated crown beam, pre-buried connection anchors steel on the side of mounting hole
The nut of muscle, prefabricated board stake top face need to be higher than crown beam bottom surface 0.1m, at the anchor bar of prefabricated board stake top portion installation and crown beam
Anchor bar be connected, real concrete is filled in mounting hole, by rear pouring concrete and Bar Anchorage method by prefabricated sheet pile with
Prefabricated crown beam connects into entirety.
The cast-in-place crown beam is reinforced concrete member, rectangular in cross-section；Installation in the top connecting hole of prefabricated sheet pile
Anchor bar simultaneously anchors into crown beam reinforcing bar, formwork erection cast-in-place concrete, and the prefabricated sheet pile of separation is connected into entirety.
When the prefabricated sheet pile is assembled into building enclosure, the horizontal connection of contiguous prefabricated sheet pile is stitched, and should be mutually staggered；?
One slab plate of covering is sewed in prefabricated sheet pile horizontal connection, and steel plate and upper and lower section sheet pile are fixed together with anchor bolt, can be increased
The bending resistance and shearing strength of strong connector.
A kind of construction method of the prefabricated board stake foundation pit enclosure structure, comprising the following steps:
The first step, the self-solidifying fluidised form soil body of constructing on fender post position
Soil-cement body, solidified earth stirring body, cement mortar body or self-solidifying mud are formed using whirl spraying, stirring or boring method
Slurry forms cylindrical or cylinder and is engaged tee section；
Soil-cement body, solidified earth stirring body are formed using two-wheel milling stirring or TRD stirring means, or using grab bucket
Perfusion forms cement slurry mixture, self-solidifying slurry body after grooving, forms rectangular section；
Second step installs prefabricated crown beam
Prefabricated crown beam is hung into having been formed in the slot section of the self-solidifying fluidised form soil body, crown beam is installed to predetermined position, and lead to
It crosses the outrigger of ground placement and adjusts bolt positioning and fix；
Cast-in-place crown beam is such as used, which is omitted from.
Third step assembles and is implanted into or is pressed into prefabricated sheet pile
Prefabricated sheet pile is hung in slot section and being installed in the reserved mounting hole of prefabricated crown beam, is beaten by being self-possessed, vibrating
Or pile press machine, overcome resistance to be implanted to the position of fender post, prefabricated sheet pile is spliced by connector, continues to repeat to hang after splicing
It puts and splices to the bottom of fender post, and pass through stake top and position adjusting bolt and the prefabricated sheet pile plan-position of outrigger adjustment and absolute altitude；
4th step fills real concrete in prefabricated sheet pile and prefabricated crown beam junction space
When prefabricated crown beam is first installed, by pasting isolation plastic foil at prefabricated crown beam reserving installation hole hole wall, so that hat
Solidified earth in beam preformed hole facilitates removing；
After the solidification of the self-solidifying stream plastomer in prefabricated sheet pile stake week, the solidified earth of prefabricated board stake top certain depth is removed, then
Prefabricated sheet pile is passed through into prefabricated crown beam reserving installation hole, and anchor bar is installed in prefabricated board stake top, it then will with concrete
Space between prefabricated crown beam and prefabricated board stake top fills real.
Anchor bar is installed when using cast in situs armored concrete crown beam, and in the reserved anchor hole at stake end,
Then assembling reinforcement and formwork erection, cast-in-place concrete.
5th step, the pre-reinforcement of the passive soil body in foundation pit
It, will be there are between the soil body passive in foundation pit and prefabricated sheet pile medial surface after rectangular slot is implanted into prefabricated sheet pile
Mud-filled gap needs to carry out pre-reinforcement by solidification mixing pile, rotary churning pile stake in the position, eliminates the mud of this component
Body.
The utility model has the advantages that the present invention is carried out longitudinal spliced and is combined with crown beam connection by the prefabricated sheet pile of implantation energy spreading
At having earth-retaining and water stopping function, alternative existing fender post wall construction concurrently.Site operation strong operability of the present invention, component
Assembling degree is high, operating efficiency is high, can guarantee the globality and construction quality of structure, reduces project cost, engineering construction
It works well.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
Fig. 1 is the prefabricated sheet pile three-dimensional figure of the long wing T shape of empty stomach of the invention；
Fig. 2 is the prefabricated sheet pile three-dimensional figure of empty stomach short limb T shape of the invention；
Fig. 3 is the prefabricated sheet pile three-dimensional figure of entity T shape of the invention；
Fig. 4 is the structural schematic diagram of the prefabricated crown beam (the prefabricated sheet pile of short limb T shape is applicable in) of the present invention；
Fig. 5 is the structural schematic diagram of the prefabricated crown beam (the long prefabricated sheet pile of wing T shape is applicable in) of the present invention；
Fig. 6 is the sheet pile assembled building enclosure schematic diagram of present invention separation arrangement；
Fig. 7 is the continuously arranged sheet pile assembled building enclosure schematic diagram of the present invention；
Fig. 8 cast-in-place concrete connection schematic diagram in part between prefabricated sheet pile and prefabricated crown beam；
Fig. 9 is the screw lock formula mechanical connecting joint schematic diagram of the prefabricated sheet pile of the present invention；
Figure 10 is the link enhancement connector schematic diagram of the prefabricated sheet pile of the present invention；
Figure 11 is present invention layout drawing of the long prefabricated sheet pile diaphragm wall of wing T shape in rectangle deep gouge on an empty stomach；
Figure 12 is layout drawing of the prefabricated sheet pile diaphragm wall of empty stomach short limb T shape of the present invention in rectangle deep gouge；
Figure 13 is present invention floor plan of the long prefabricated sheet pile of wing T shape in solidified earth mixing pile on an empty stomach；
Figure 14 is floor plan of the prefabricated sheet pile of empty stomach short limb T shape of the present invention in solidified earth mixing pile；
Figure 15 is the pile extension schematic diagram that the prefabricated sheet pile of the present invention is implanted into ground.
In figure: the 1 long prefabricated sheet pile of wing T shape of empty stomach, the 2-prefabricated sheet piles of empty stomach short limb T shape, the 3-prefabricated sheet piles of entity T shape,
4-prefabricated crown beams (the prefabricated sheet pile of short limb T shape is applicable in), 5-prefabricated crown beams (the long prefabricated sheet pile of wing T shape is applicable in), 6-prefabricated sheet piles
Mechanical connecting joint, the embedded nut of 7-waist rail purlin positions connection, the embedded nut of 8-prefabricated crown beams connections, 9-is pre-
It leaves a blank chamber, the embedded nut that 10-prefabricated crown beams are connect with purlin, 11-prefabricated crown beams connect bolts, 12-cast-in-place crown beams,
The reinforcing steel bar connecting sleeve tube of 13-stress main reinforcements, 14-stress main reinforcements, 15-high-strength epoxy binders, 16-screw lock connecting rods,
17-above save prefabricated sheet pile, the prefabricated sheet piles of section under 18-, 19-junction steel plates, 20-high-strength bolts, 21-rectangle deep gouges, and 22-
Solidified earth mixing pile, 23-fixed guide framves, 24-cranes, 25-connecting rods, 26-interlockings holes, 27-reserved connecting holes,
28-reserved Grouting Pipes.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Standard component required for prefabricated sheet pile be it is prefabricated by modulated dimension standard, the cross section of prefabricated sheet pile can be divided
For the prefabricated sheet pile 1 of long wing T shape, the prefabricated sheet pile 2 of empty stomach short limb T shape and the prefabricated sheet pile 3 of entity T shape on an empty stomach, referring to Fig. 1, Fig. 2 and figure
3。
It can be seen that prefabricated sheet pile from Fig. 1 and Fig. 2 to be made of cavity 9 and armored concrete, in the both ends of the surface of sheet pile
The mechanical connecting joint 6 of pre-buried stress main reinforcement connection is distributed with, connection type is as shown in Figure 9.
When connection, connecting rod 25 is first installed in the connection sleeve of the lower end surface of the prefabricated sheet pile 17 of upper section, and under connection
It saves and coats epobond epoxyn 15 on the concrete surface of sheet pile 18, lower section sheet pile 18 is fixed on leading truck 23, is then hung
Machine 24 slings section sheet pile 17 and mobile, the connection sleeve 26 under connecting rod is aligned on section 18 end face of sheet pile, and is inserted into
Connector is lockked, that is, realizes mechanical connection.This mechanical connection is the docking to every main stress reinforcing bar, is mixed simultaneously
Solidifying soil contact face also achieves high strong bonding, as shown in Fig. 6, Fig. 7 and Figure 15.
Prefabricated 4 structure of crown beam is as shown in Figure 4 and Figure 5, the insertion hole 9 of prefabricated sheet pile is reserved in 4 plane of crown beam, in court
The embedded nut 10 for thering is connection to support by regular distribution on the side of foundation pit.Connection between two sections of crown beams uses above and below Z-shaped
Overlap joint reserves connecting hole 27 that is, in the pre-buried attaching nut 8 of the upper surface of lower part connector in the connector of top.When two sections of crown beams 4
When docking, binder 15 is inwardly poured by reserved connecting hole 27, is inserted into attaching nut 8 on bolt 20 and lower part connector
Connection is tightened.
Example one, the sheet pile assembled foundation pit enclosure structure construction method arranged at a certain distance
The first step, corresponding size prefabricated pile can be implanted by constructing to be formed using whirl spraying, stirring or boring method on fender post position
The stream modeling shape of plate solidifies the soil body 22, as shown in Fig. 6, Figure 13 and Figure 14.
Second step installs prefabricated crown beam
Prefabricated crown beam 4 is hung into being completed in the groove that stream modeling shape solidifies the soil body 22, is installed to predetermined position, and pass through
The outrigger and adjust bolt positioning fixation that ground is placed；
Third step assembles and is implanted into prefabricated sheet pile
Prefabricated sheet pile 2 is hung into crown beam position, is installed in the reserved mounting hole 9 of prefabricated crown beam 4, by being self-possessed, vibrating
It beats or pile press machine, resistance is overcome to be implanted to the position of fender post.Prefabricated sheet pile 2 by the mechanical connecting joint 6 of prefabricated sheet pile into
Row splicing, continues to be implanted to design position after splicing, horizontal layout is as shown in figure 12.
For the shearing resistance and bending strength for enhancing mechanical connecting joint 6, in foundation pit side, the upper and lower position of horizontal joint is embedded with
Attaching nut 10, and one block of steel plate 19 is covered horizontal joint, and bolt 20 is passed through on preformed hole and sheet pile 2 on steel plate 19
Embedded nut 10 is tightened, that is, realizes enhancing connection, as shown in Figure 10.
When needing prefabricated 2 spreading of sheet pile of two sections or more to be assembled into building enclosure, preferably by adjusting the prefabricated sheet pile 1 of two sections
Length realizes that the horizontal connection seam between contiguous prefabricated sheet pile 1 is staggeredly arranged, as shown in Figure 6 and Figure 7.
4th step fills real concrete in prefabricated sheet pile 2 and prefabricated 4 junction space of crown beam
It, will by pasting isolation plastic foil at the hole wall of prefabricated 4 reserving installation hole 9 of crown beam when prefabricated crown beam is first installed
Solidified earth in crown beam preformed hole facilitates removing, then with concrete by prefabricated crown beam 4 and prefabricated board sheet pile 1 top between space
Fill real.
Example two, continuously arranged sheet pile assembled foundation pit enclosure structure construction method
The first step, the self-solidifying fluidised form soil body of constructing on fender post position
The soil body is solidified using the fluidised form that two-wheel milling stirring or TRD stirring means form equal thickness, or using grab bucket deep gouge
Machine grooving simultaneously forms rectangle deep gouge 21, full of the stream modeling shape soil body in slot；
Second step, installation are implanted into the leading truck of prefabricated sheet pile 1 and assemble and be implanted into prefabricated sheet pile
The leading truck is used for the guiding of prefabricated sheet pile 1 and is fixed temporarily, and removes before installing prefabricated crown beam 4.Prefabricated sheet pile 1
Plane of arrangement it is as shown in Figure 11,12.Can be seen that from Figure 11 and Figure 12, the prefabricated sheet pile 1 or 2 of empty stomach T shape adjacent two flank it
Between form a dovetail groove, be embedded in corresponding with this dovetail groove size solid prefabricated sheet pile 3 of T shape, can be by adjacent two sheet piles 1
It is mutually twisted together, forms continuous wall building enclosure.
It is one solid prefabricated sheet pile 3 of T shape of insertion between two prefabricated sheet piles 1, and this solid prefabricated sheet pile of T shape
3 stake top is positioned at the bottom surface of prefabricated crown beam 4, to guarantee prefabricated crown beam 4 for an entirety.
Third step installs prefabricated crown beam
First the leading truck for being temporarily implanted into prefabricated sheet pile 1 is removed, prefabricated crown beam 4 is installed in the position.
4th step fills real concrete in the gap between prefabricated sheet pile and prefabricated crown beam
The gap between prefabricated crown beam 4 and prefabricated sheet pile 1 is filled real with pea gravel concreten.
4th step, it is in the slip casting in the continuously built-in slip casting pipe 28 of assembly wall, assembly seam filling is closely knit, realize water shutoff
It is required that
Part cast-in-situ reinforced concrete connection method between example three, prefabricated sheet pile and prefabricated crown beam
As shown in figure 8, removing prefabricated board stake top certain depth after the solidification of the self-solidifying fluidised form soil body in prefabricated sheet pile stake week
Solidified earth, and horizontal anchor bar is installed in the embedded nut on 9 periphery of the preformed hole of crown beam, then in the stake top of prefabricated sheet pile
Installation anchor bar simultaneously anchors into the horizontal reinforcement of crown beam, and the preformed hole 9 of prefabricated crown beam is filled real with concrete, that is, is realized
Part cast-in-situ reinforced concrete connects between prefabricated sheet pile and prefabricated crown beam.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (10)
1. a kind of foundation pit enclosure structure and its construction method of the assembly of PC component, characterized in that the foundation pit enclosure of PC component assembly
Structure is made of prefabricated sheet pile and rectangle crown beam；Prefabricated sheet pile is prestressed high-strength reinforced concrete member, and stress main reinforcement is
High tensile reinforcement, strength grade of concrete are greater than C50, and section configuration is divided into long wing T shape, empty stomach short limb T shape and solid T shape three on an empty stomach
Kind；The standard element for being designed and sized to modularization of prefabricated sheet pile, length are not more than 16m, and width is not more than 2.5m；Prefabricated board
Spreading uses strong mechanical connecting joint, concrete surface and the connector internal clearance fluidised forms such as every reinforcing bar along its length for stake
Epobond epoxyn fill and bond；Prefabricated sheet pile is implanted in ground in certain intervals, is assembled as separate type campshed
Building enclosure；After the prefabricated sheet pile of empty stomach T shape arranges at a certain distance, a dovetail groove can be formed between adjacent two flank,
This dovetail groove is embedded in the solid prefabricated sheet pile of T shape, can be mutually twisted together adjacent sheet pile, form continuous wall and enclose
Protection structure；Grouting Pipe is preset in the waist of the solid prefabricated sheet pile of T shape, connecting sewing is blocked by the Grouting Pipe slip casting after assembly
Percolating water；Prefabricated crown beam is to reserve the reinforced concrete rectangular crown beam in prefabricated sheet pile insertion hole, and the connection between crown beam is tenon
Formula mechanical connection manner；Method for implantation is to be divided into three kinds according to the type on stratum and the size of sheet pile, the first is to be implanted directly into
Into the self-solidifying fluidised form soil body, second is inserted into soft soil layer by machinery vibration platen press, the third is to sink to deep gouge machine
In the rectangular channel that tool excavates, the self-solidifying fluidised form soil body is filled in slot；At the top of PC component, prefabricated crown beam or cast-in-place crown beam are set
Prefabricated sheet pile is linked together, overall structure is formed；PC component and prefabricated crown beam are cast-in-place mixed by anchoring into reinforcing bar in preformed hole
Solidifying soil connection, forms overall structure；Connection between PC component and the waist rail of support (purlin) and underground structure uses pre-buried spiral shell
Mother's connection anchor bar method connection.
2. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that pre-
The spreading method of making sheet stake be implantation work progress spreading, when prefabricated sheet pile be implanted to upper surface higher than fixed guide frame 1.2~
When 1.5 meters of positions, the prefabricated sheet pile of the section is fixed, and fluidised form epobond epoxyn is poured into connecting end surface and interlockings hole,
Then the prefabricated sheet pile of another section of handling, be located in and need spreading lower section sheet pile position top, be located at the prefabricated sheet pile
Lower end surface connecting hole in be mounted with connecting rod, these connecting rods are inserted into corresponding interlockings hole and are compressed, that is, are realized
The length docking of prefabricated sheet pile.
3. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that pre-
Gap between making sheet stake is to be filled by solidified earth or filled by entity prefabricated pile；Solidified earth be by the agitated stake of in-situ soil or
Rotary churning pile or drilling displacement injection premixing solidified earth and prefabricated sheet pile connect into continuous wall.
4. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that pre-
Crown beam processed is reinforced concrete member, and prefabricated sheet pile section configuration is distributed with and through beam body in rectangular in cross-section on the face of Liangping
Mounting hole, prefabricated sheet pile is inserted in place by mounting hole, the guiding as prefabricated sheet pile simultaneously of the mounting hole in prefabricated crown beam
Hole, prefabricated board stake top face are higher than plane 0.5m or more in crown beam, real coagulation are filled in the gap between mounting hole and prefabricated sheet pile
Soil；Prefabricated crown beam connects joggle by both ends and forms entirety, pre-buried attaching nut in the lower part joint tongue of joint location, top
Indwelling connecting hole in joint tongue, it is using bolt that top and the bottom connection feather joint is more next；It can also make to connect with fashioned iron in joint area
Connect stiffener.
5. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that pre-
The mounting hole of prefabricated sheet pile is reserved in crown beam processed, the nut of pre-buried connection anchor bar, prefabricated board on the side of mounting hole
Stake top face need to be higher than crown beam bottom surface 0.1m, and the anchor bar that prefabricated board stake top portion is installed is connected with the anchor bar at crown beam,
Real concrete is filled in mounting hole, and prefabricated board stake top and prefabricated crown beam are connected into entirety.
6. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that hat
Beam is cast-in-situ steel reinforced concrete component, rectangular in cross-section；Anchor bar is installed in the top connecting hole of prefabricated sheet pile and is anchored into
In the reinforcing bar of cast-in-place crown beam, prefabricated sheet pile is connected into entirety by formwork erection cast-in-place concrete.
7. the foundation pit enclosure structure and its construction method of a kind of PC component according to claim 1, characterized in that including with
Lower step:
The first step is constructed and to be formed using whirl spraying, stirring, two-wheel milling stirring, TRD stirring means or boring method on fender post position
Fluidised form solidifies the soil body, and the rectangular channel excavated with deep gouge machine, is full of fluidised form in slot and solidifies the soil body；
Second step installs prefabricated crown beam
Prefabricated crown beam is hung into being completed in the groove of fluidised form solidified earth body construction, is installed to predetermined position, and pass through ground
The outrigger of placement and adjusting bolt positioning are fixed；
Further, when using cast-in-place concrete crown beam or diaphragm wall building enclosure need to be assembled into, sheet pile implantation need to be first installed
Leading truck, for prefabricated sheet pile construction guidance and be fixed temporarily, removed before prefabricated crown beam is installed；
Third step is implanted into prefabricated sheet pile and live spreading
The position that prefabricated sheet pile is hung onto crown beam is installed in the reserved mounting hole of prefabricated crown beam, beaten by being self-possessed, vibrate or
Pile press machine overcomes resistance to be implanted to the position of fender post.Prefabricated sheet pile is spliced by mechanical connecting joint, is continued after splicing
It is implanted to design position；
Further, when need to be assembled into diaphragm wall building enclosure, when empty stomach T shape prefabricated sheet pile implantation require adjacent two flank it
Between, a dovetail groove is formed by leading truck, is then inserted into the solid prefabricated sheet pile of T shape corresponding with this dovetail groove size, it will
Adjacent two sheet piles are mutually twisted together, form continuous wall building enclosure.
4th step fills real concrete in prefabricated sheet pile and prefabricated crown beam junction space
When prefabricated crown beam is first installed, by pasting isolation plastic foil at the hole wall of prefabricated crown beam reserving installation hole, so that crown beam
Solidified earth in preformed hole facilitates removing, is then filled the space between prefabricated crown beam and prefabricated board sheet pile with pea gravel concreten
It is real.
5th step, the pre-reinforcement of the passive soil body in foundation pit
It, will there are be full of between the soil body passive in foundation pit and prefabricated sheet pile medial surface after rectangular slot is implanted into prefabricated sheet pile
Mud and the interlayer for loosening ground need to carry out pre-reinforcement by mixing pile, rotary churning pile in the position, to improve the bullet of the interlayer
Property modulus and intensity.
6th step, grouting seal water in the pre-reinforcement of the passive soil body and injected hole in foundation pit
The slip casting in the continuously built-in slip casting pipe of assembly wall, assembly seam filling is closely knit, realize water shutoff requirement.
8. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that phase
Adjacent prefabricated sheet pile horizontal connection seam, can be arranged on the same horizontal absolute altitude；When being arranged on different horizontal absolute altitudes, can make
Horizontal connection seam mutually staggers；One block of steel plate of covering is sewed in the horizontal connection of the mechanical spreading of prefabricated sheet pile, uses anchor bolt
Steel plate and upper and lower section sheet pile are fixed together, the gap between steel plate and concrete is filled with epoxy resin and adhesive solidification.
9. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that
After the PC component for installing connection in rectangle deep gouge, need to solidify the fluidised form soil body addition cement class curing agent in slot.
10. the foundation pit enclosure structure and its construction method of a kind of PC component assembly according to claim 1, characterized in that
The nut of anchor connection is embedded on the inside of prefabricated sheet pile along the waist rail position of inner support and with outer wall of basement junction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910134941 | 2019-02-24 | ||
| CN2019101349417 | 2019-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109972630A true CN109972630A (en) | 2019-07-05 |
Family
ID=67083149
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910273926.0A Withdrawn CN109972630A (en) | 2019-02-24 | 2019-04-07 | A kind of foundation pit enclosure structure and its construction method of the assembly of PC component |
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| Country | Link |
|---|---|
| CN (1) | CN109972630A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173004A (en) * | 2020-03-23 | 2020-05-19 | 南京市测绘勘察研究院股份有限公司 | Special-shaped precast pile zipper type supporting structure and construction method thereof |
| CN112921960A (en) * | 2021-02-06 | 2021-06-08 | 广东三和管桩股份有限公司 | Supporting pile, foundation pit retaining wall, pile splicing structure, guide frame and construction method of guide frame |
| CN113756319A (en) * | 2020-06-03 | 2021-12-07 | 杭州市城市建设基础工程有限公司 | Foundation pit support structure and construction method thereof |
| CN114718081A (en) * | 2022-03-29 | 2022-07-08 | 中天建设集团有限公司 | Prefabricated assembled recyclable foundation pit enclosure pile and construction method thereof |
| CN114808696A (en) * | 2022-05-07 | 2022-07-29 | 广西欣港交通投资有限公司 | Prefabricated and cast-in-place combined anchorage foundation enclosure structure and construction method |
-
2019
- 2019-04-07 CN CN201910273926.0A patent/CN109972630A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173004A (en) * | 2020-03-23 | 2020-05-19 | 南京市测绘勘察研究院股份有限公司 | Special-shaped precast pile zipper type supporting structure and construction method thereof |
| CN113756319A (en) * | 2020-06-03 | 2021-12-07 | 杭州市城市建设基础工程有限公司 | Foundation pit support structure and construction method thereof |
| CN112921960A (en) * | 2021-02-06 | 2021-06-08 | 广东三和管桩股份有限公司 | Supporting pile, foundation pit retaining wall, pile splicing structure, guide frame and construction method of guide frame |
| CN114718081A (en) * | 2022-03-29 | 2022-07-08 | 中天建设集团有限公司 | Prefabricated assembled recyclable foundation pit enclosure pile and construction method thereof |
| CN114718081B (en) * | 2022-03-29 | 2024-05-03 | 中天建设集团有限公司 | Prefabricated pile capable of recycling foundation pit enclosure and construction method thereof |
| CN114808696A (en) * | 2022-05-07 | 2022-07-29 | 广西欣港交通投资有限公司 | Prefabricated and cast-in-place combined anchorage foundation enclosure structure and construction method |
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Application publication date: 20190705 |
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