CN105714833B - A kind of construction method of steel sheet pile open caisson supporting - Google Patents
A kind of construction method of steel sheet pile open caisson supporting Download PDFInfo
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- CN105714833B CN105714833B CN201610115841.6A CN201610115841A CN105714833B CN 105714833 B CN105714833 B CN 105714833B CN 201610115841 A CN201610115841 A CN 201610115841A CN 105714833 B CN105714833 B CN 105714833B
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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
- 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
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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Abstract
The present invention proposes a kind of construction method of steel sheet pile open caisson supporting, and be applied to steel sheet pile in open caisson construction by creativeness, using steel sheet pile an as part for open caisson, the range of application of open caisson is expanded, with following steps：(1) stirred to underground with mixing pile machine, soil is stirred into pine, steel sheet pile is inserted in the soil for stirring pine, steel sheet pile is mutually locked to form steel sheet-pile wall；(2) to enclose carried out in region excavation of foundation pit and assemble in steel sheet-pile wall and enclose purlin, excavation of foundation pit with the installation for enclosing purlin alternately, when foundation ditch bottom surface downwards apart from 2~4 meters of the lower surface of steel sheet pile when, suspend excavation of foundation pit；(3) the cast-in-situ steel reinforced concrete cylinder at the top of steel sheet-pile wall, armored concrete cylinder is overlapped with steel sheet-pile wall；(4) weight needed for configuring steel sheet pile well sinking on armored concrete cylinder, designs submergence depth, and complete the excavation of foundation ditch and enclose the installation of purlin by steel sheet pile well sinking to it.
Description
Technical field
The invention belongs to the construction method of the supporting of underground structure, belong to building field, and in particular to a kind of steel sheet pile sinks
The construction method of well supporting.
Background technology
Open caisson is a kind of common method of Construction of Deep Foundation, is characterized in：By the building base of certain depth located underground
Plinth or structures, first make more than ground, form a tubular structure, are then constantly cut the earth in cylinder, conduct oneself with dignity by well body
And progressively sink, after sinking to predetermined design absolute altitude, back cover is carried out, the components such as an inner bottom plating, beam, top board are constructed, ultimately form
One underground structure or structures.
Open caisson has the advantages that uniqueness in construction：Floor space is small, it is not necessary to supporting construction, compared with heavy excavation, digs
Soil amount is small, and the influence to closing on building is small, easy to operate, without special professional equipment.By continuously improving, open caisson is applied
Work technology and construction equipment have very big improvement, in order to reduce borehole wall side frictional resistance during open caisson construction, occur
Calmed the anger after sludge lubricant cover method, wall the methods such as method.When being constructed in intensive groups of building, in order to ensure underground utilities and
The safety of building, occurs in that " boring suction soil Open caisson construction technology " and " central island-type sinking construction technique ".These construction skills
The appearance of art can make earth's surface only produce the sedimentation and displacement of very little, but there is also working procedure excessively, and construction technology is complex,
Technical requirements are high, the problems such as quality control requirement is tight.
In open caisson, due to the good compressive property of circular open caisson, and to the disturbance of the surrounding soil body also compared with rectangular open caisson
Small, the application of circular open caisson will be extensively in rectangular open caisson.But, the shortcoming of circular open caisson is also apparent from, due to open caisson outer wall
The frictional resistance of soil is larger on face, and especially when open caisson planar dimension is smaller, submergence depth is larger, when face is native and solid, its top
May be clamped by the soil body, make its underpart hanging, easily cause borehole wall drawing crack, therefore, circular open caisson is typically in the not deep or soil that buries
Matter loosely in the case of use.
In order to reduce penetration resistance, the cutting shoe of blade-like is typically all made in the borehole wall bottom of open caisson, and the function of cutting shoe is
Reduce penetration resistance, in order to prevent the cutting shoe in sinking watching to be damaged, according to well sinking when pass through the soft of soil layer
Counter-force size decision in hard degree and cutting shoe unit length, is typically set to 10~30cm by the tread width of cutting shoe.
But, these improvement still fail to make the advantage of open caisson to play complete, especially when level of ground water is higher, due to heavy
It is oversize that the cutting shoe of well can not be set, it is impossible to carries out effective sealing to underground reservoir, it is necessary to using other instead has sealing work(
Then the pile body of energy carries out the construction of hypogee as pattern foundation pit supporting structure in foundation ditch.
The content of the invention
To solve the above problems, the present invention proposes a kind of construction method of steel sheet pile open caisson supporting, creative by steel plate
Stake is applied in open caisson construction, using steel sheet pile an as part for open caisson, expands the range of application of open caisson.
The construction method of pattern foundation pit supporting structure of the present invention, with following steps：
(1) stirred to underground with mixing pile machine, soil is stirred into pine, steel sheet pile is inserted in the soil for stirring pine, steel sheet pile is mutually interlocked
Conjunction forms steel sheet-pile wall；Mixing pile machine is the special equipment for making cement mixing method, in this application, is only used for stirring in soil
Pine, in the course of the work, not gunite；
(2) to enclose carried out in region excavation of foundation pit and assemble in steel sheet-pile wall and enclose purlin, excavation of foundation pit is handed over the installation for enclosing purlin
For carrying out, when foundation ditch bottom surface downwards apart from 2~4 meters of the lower surface of steel sheet pile when, suspend excavation of foundation pit；
(3) the cast-in-situ steel reinforced concrete cylinder at the top of steel sheet-pile wall, armored concrete cylinder is overlapped with steel sheet-pile wall,
Form steel sheet pile open caisson；
(4) weight needed for configuring steel sheet pile well sinking on armored concrete cylinder, steel sheet pile well sinking is arrived
Its design submergence depth, and complete the excavation of foundation ditch and enclose the installation of purlin.
In the present invention, steel sheet pile is combined with armored concrete cylinder, formed a kind of new open caisson, for convenience of description, will
It is referred to as steel sheet pile open caisson, and the top of steel sheet pile open caisson is reinforced concrete structure, and bottom is steel sheet pile, and steel sheet pile not only rises
To the effect of cutting shoe, but also due to steel sheet pile can in depth under, effectively sealing is carried out to underground reservoir, play sealing curtain
The effect of curtain.
Current, the pile sinking mode of steel sheet pile mainly has hammering method, vibratory drilling method or static pressure method, and hammering method and vibratory drilling method are being applied
Man-hour, noise and vibration are larger, and environmental pollution is larger, are not suitable for being constructed in city and dense population areas；Although static pressure method low noise
Sound and low vibration, but it is suitable only for softer soil property, when the pile sinking depth of steel sheet pile is deep, using the construction of static pressure method
Time is more long, less efficient, therefore at present, main method when hammering method and vibratory drilling method or steel sheet pile construction.
To avoid noise and the larger vibration brought during using hammering method and vibratory drilling method pile sinking, the application from employing stirring
The mode loosened the soil reduces noise and the vibration during steel plate sunk pile in advance for stake machine；In the application, the construction point of steel sheet pile open caisson
It is two steps, the first step：Soil is stirred into pine with mixing pile machine, is then stirred steel sheet pile insertion in the soil of pine, steel sheet pile is by itself weight
Amount completes the sinking in soil under less pressure；Second step：The top pouring of the steel sheet-pile wall formed in steel sheet pile
Armored concrete cylinder, completes the making of steel sheet pile open caisson, and steel sheet pile well sinking is then configured on armored concrete cylinder
Required weight, submergence depth is designed by steel sheet pile well sinking to it.
Because the weight of armored concrete cylinder is larger, steel sheet pile open caisson is set to possess the deadweight that traditional open caisson has
Greatly, the advantage sunk, and the advantage that larger external pressure can be born are conducive to.With the progressively excavation of foundation ditch, foundation pit side-wall
The pressure of the soil body also can be increasing, and it is excellent that armored concrete cylinder utilizes that the rigidity that itself has is good, shear strength is high
Put to resist the pressure of the foundation pit side-wall soil body.
In the sinking watching of typical round open caisson, when well sinking depth is larger, face is native and it is more closely knit when, its top can
Can be clamped by the soil body, make its underpart hanging, easily cause borehole wall drawing crack.In this application, when steel sheet pile open caisson is arranged to round
During shape, due to soil is stirred into pine in advance, in the sinking watching of steel sheet pile open caisson, will not occur what steel sheet pile open caisson was clamped by the soil body
Phenomenon, and surrounding soil is more uniform with pressure ratio to the frictional force of steel sheet pile open caisson, steel sheet pile open caisson is few in sinking watching
Run-off the straight phenomenon, even if there is slight tilt phenomenon, the inclination for correcting steel sheet pile open caisson is relatively easy to, it ensure that steel plate
The sinking precision of stake open caisson.
In the work progress of mixing pile machine, the sand of bulky grain in soil or gravel soil and the like can be broken simultaneously
It is broken, it is to avoid steel sheet pile runs into larger resistance in sinking watching, it is ensured that stability and safety when steel sheet pile sinks in soil
Property.
In this application, it is divided into that two steps are corresponding with steel sheet pile open caisson construction, the excavation to foundation ditch is also classified into two steps, first
Step is after the sinking that steel sheet pile completes in the soil for stirring pine, part excavation to be carried out to foundation ditch, temporarily retains the part in foundation ditch
The soil body, to keep compressing and fixation of the soil body to steel sheet pile, it is ensured that the safe construction of supporting, it is to avoid after all excavating, steel
The lower end of sheet pile produces the situations such as bending, deformation in the case of abandoned；Second step is to complete armored concrete cylinder
Cast, after forming steel sheet pile open caisson, with the sinking of steel sheet pile open caisson, complete the excavation to foundation ditch.Portion is carried out to foundation ditch to separate
Dig, it is possible to decrease the soil body is greatly reduced the weight of configuration needed for steel sheet pile well sinking to the frictional resistance of steel sheet pile open caisson,
Improve efficiency of construction.After the foundation ditch part for completing the first step is excavated, the bottom surface of foundation ditch is downwards apart from the lower surface 2 of steel sheet pile
~4 meters are relatively reasonable, and 2~4 meters of soil bodys of thickness can form effective constraint to steel sheet pile, will not produce the situations such as bending, deformation,
Whole supporting is set to be under safely controllable.
To be overlapped between armored concrete cylinder and steel sheet-pile wall, armored concrete cylinder is turned into steel sheet-pile wall
One entirety, could form steel sheet pile open caisson, if there are gap between armored concrete cylinder and steel sheet-pile wall, outside supporting
The soil body or water body in portion can be entered into foundation ditch by the gap, and the product soil or ponding in foundation ditch increase, and cause difficulty of construction to increase
Greatly；By the overlap joint of armored concrete cylinder and steel sheet-pile wall, can also the upper end of preventing portion steel splitting sheet pile produced under the pressure of the soil body
Raw flexural deformation, and supporting is failed.
Carry out part excavation in foundation ditch, and purlin is enclosed in assembling in digging process, with enclose purlin by steel sheet pile be connected as one it is whole
Body, prevents in digging process, and under the pressure of the outer soil body of foundation ditch, part steel sheet pile is deformed, the even accident such as failure, and
When install and enclose purlin and ensure that the safety of supporting construction is carried out.
In the whole digging process of foundation ditch, to be installed in time according to design requirement and enclose purlin, foundation ditch excavation with enclose purlin
Installing needs alternately, in Excavation Process, after purlin installation site is enclosed in arrival, suspends the excavation of foundation ditch, will enclose purlin
After being installed in place, continue the excavation of foundation ditch, after arrival is next encloses purlin installation site, the excavation of foundation ditch is stopped again, and carry out
The installation of purlin is enclosed, so circulation is until completing the excavation of foundation ditch and enclosing the installation of purlin.Avoid the depth of excavation of foundation pit once
It is excessive, and produce unnecessary potential safety hazard；Steel sheet pile is under the pressure of the foundation ditch outside soil body and water body, and with foundation ditch
The increase of cutting depth, this pressure also can rapid increase, easily make steel sheet pile produce distortion, deformation, when serious, steel sheet pile will
Bending can be produced, supporting is collapsed, the timely installation of purlin is enclosed, steel sheet-pile deformation can be effectively limited, the stabilization of supporting construction is kept
Property.
After steel sheet pile open caisson completes, the top end face of armored concrete cylinder can be slightly below ground, so as to top plus
If cover plate, the top end face of armored concrete cylinder is 0.3~1.0 meter less than the highly preferred of ground.
Describe for convenience, the native region for being stirred pine is referred to as the band that loosens the soil, the band that loosens the soil has certain width, and along base
The edge ring in hole around, the band that loosens the soil width preferably over steel sheet pile total height.In order to avoid steel sheet pile is touched in sinking watching
To the soil for not stirring pine, optimal selection be loosen the soil band width be mutually locked than steel sheet pile after the steel sheet-pile wall that is formed
Thickness is big 100~350 millimeters.
At present, the pile sinking mode of steel sheet pile is generally：First several piece steel sheet pile is bolted together in advance, adjacent steel sheet pile
It is interlocked by both sides fore shaft, forms a face screen, then the steel sheet pile for forming screen is sunk as an entirety
Stake, the pile-driving method is referred to as screen-type piling, and screen-type piling can accelerate the pile sinking depth of steel sheet pile, can also be to greatest extent
Ensure that the precision of stake；But had one disadvantage in that using screen-type piling, be exactly that several piece steel sheet pile is in connection when supporting is for circle
The screen for being formed afterwards will have a radian, and the radian will be consistent with the radian of supporting, but in actual engineering, the radian of screen
Often there is small deviation with the radian of supporting, in order to prevent above-mentioned small deviation from steel sheet pile is successfully sunk to regulation
Depth, or inclination is produced in sinking watching, the width of the band that makes to loosen the soil is bigger than the thickness of steel sheet-pile wall 100~350 millimeters, can protect
Card steel sheet pile successfully sinks.
To ensure that the soil body below foundation ditch bottom surface is not affected by the disturbance of mixer, make the soil body still in original state, to ensure
The soil body has enough holding powers to steel sheet pile, and mixing pile machine is desirable to setting higher than foundation ditch bottom surface to the bosom that underground stirs
0.5~1.5 meter of absolute altitude of meter.
Armored concrete cylinder is preferably 0.3~0.8 meter with the lap of splice of steel sheet-pile wall.The lap of splice 0.3~
Most design requirement can be met in the range of 0.8 meter, the lap of splice is too small to make bonding strength not enough, and the lap of splice is long
Construction cost can only be increased, safety coefficient will not be increased to whole supporting again.
In this application, in the weight needed for configuration steel sheet pile well sinking on armored concrete cylinder, at least it is divided into
Configure twice, after configuration and the steel sheet pile well sinking of weight are completed every time, continue the excavation of foundation ditch and enclose the installation of purlin, until
Complete the sinking of steel sheet pile open caisson, and foundation ditch excavation and enclose the installation of purlin.The method of this multiple configuration weight so that can
To carry out the sinking of steel sheet pile open caisson using minimum counterweight；In Excavation Process, with foundation ditch, the soil body is constantly dug
Go, chucking power reduction of the soil body to steel sheet pile open caisson, steel sheet pile open caisson can produce certain in deadweight and in the presence of configuring weight
Sinking, this can cause certain danger to the operation in foundation ditch, while it is also possible that steel sheet pile open caisson submergence depth depart from
Control, configuration weight, can control in the range of tolerance the submergence depth of steel sheet pile open caisson with comparalive ease by several times.
The thickness of armored concrete cylinder is preferably 0.3~0.8 meter, and the thickness range can ensure the construction of agent structure
Need.
In construction, it is preferably selected using three axes agitating pile machine, the characteristics of three axes agitating pile equipment is efficient high, its efficiency
5~8 times of biaxial rneader can be typically reached, operating efficiency can be effectively improved using three axes agitating pile machine.
In the present invention, the construction equipment for being used is low vibration, the equipment of low noise, ensure that construction quality
On the basis of, produced noise and vibration during steel sheet pile construction is also reduced to greatest extent, reach civilized construction
Effect.
Brief description of the drawings
Fig. 1 is that during being constructed using the present invention, soil is stirred pine by mixing pile machine, and inserts steel in the soil for stirring pine
Structural representation after sheet pile.
Fig. 2 is to complete foundation ditch part excavation on the basis of Fig. 1 and install to enclose the structure schematic diagram after purlin.
Fig. 3 is to complete armored concrete cylinder on the basis of Fig. 2 to pour, and forms the structural representation letter after steel sheet pile open caisson
Figure.
Fig. 4 is the sinking that steel sheet pile open caisson is completed on the basis of Fig. 3, and completes excavation of foundation pit and all enclose purlin and install
Structure schematic diagram after finishing.
Fig. 5 is that the structure schematic diagram after the construction of foundation ditch inner bottom plating is completed on the basis of Fig. 4.
Fig. 6 is the top view of Fig. 4.
Fig. 7 is the enlarged drawing of G parts in Fig. 6.
Marked in figure：
2. armored concrete cylinder, 3. steel sheet pile, 4. steel bracket, 5. reinforced concrete fortifield village purlin, 6. base plate, 10. ground,
11. foundation ditches completion bottom surface, the medial surface of 13. steel sheet-pile walls, the lateral surface of 14. steel sheet-pile walls,
A. design of foundation pit cutting depth, the height of B. steel sheet-pile walls,
C. the lap of splice of armored concrete cylinder and steel sheet-pile wall, the thickness of E. steel sheet-pile walls,
F. the height of armored concrete cylinder, the design submergence depth of H. steel sheet pile open caissons.
Specific embodiment
Below in conjunction with specific hypogee structure, the invention will be further described, in the present embodiment, to be built
What is made is a circularly storehouse, ground storehouse using steel sheet pile open caisson as supporting, the armored concrete cylinder of its Steel Sheet Pile open caisson
Internal diameter is 20 meters, 16 meters of design of foundation pit cutting depth, 19.5 meters of the design submergence depth of steel sheet pile open caisson, and steel sheet pile 3 is used
The U-shaped steel sheet pile and bracket steel sheet pile of 400*170, bracket steel sheet pile are advance using the U-shaped steel sheet pile and steel bracket of 400*170
Make and standby；U-shaped steel sheet pile is identical with the length of bracket steel sheet pile, is 15 meters, the steel sheet-pile wall being made up of steel sheet pile 3
Height is also 15 meters；Mixing pile machine is 15 meters to the depth that underground stirs；Enclose purlin and purlin is enclosed using spiced by steel reinforced concrete formula, enclose
2.5 meters of purlin spacing, stake machine uses three axes agitating pile machine；The pile sinking of steel sheet pile 3 is driven piles using screen-type；In the accompanying drawings, mark 10
Represent ground.
In the present embodiment, bracket steel sheet pile is that steel bracket 4 is welded on the lateral surface of the web of U-shaped steel sheet pile,
The bearing-surface of steel bracket 4 is vertical with the length direction of U-shaped steel sheet pile, and 4 pieces of steel brackets are welded with every piece of bracket steel sheet pile.
Above-mentioned circularly storehouse is using comprising the following steps that the present invention is built：
(1) refering to Fig. 1, stirred to underground with mixing pile machine, soil stirred into pine, then steel sheet pile 3 inserted and is stirred in loose soil,
In the present embodiment, circularly the design of foundation pit cutting depth in storehouse is 16 meters, and mixing pile machine is 15 meters to the depth that underground stirs, high
In 1 meter of the designed elevation of foundation ditch bottom surface, to ensure after the completion of excavation of foundation pit that the soil body at where steel sheet pile 3 is not affected by mixing pile machine
Disturbance so that the soil body to steel sheet pile 3 have enough holding powers.
Steel sheet pile 3 is mutually locked to form the steel sheet-pile wall of circle；The steel sheet pile 3 includes U-shaped steel sheet pile and bracket steel plate
Stake.
In the present embodiment, bracket steel sheet pile uses U-shaped steel sheet pile and the pre-production of steel bracket 4；Pre-production bracket
Steel sheet pile, can carry out perfect quality testing to it, to ensure the installation strength of steel bracket, it is to avoid carry out installation steel at the scene
During bracket processed, it is impossible to the drawbacks of carrying out total quality and detect；Certainly, if condition is restricted, it is also possible to by all U-shaped steel
Sheet pile, including making after the U-shaped steel sheet pile used by bracket steel sheet pile is fully completed sinking, then steel bracket is pacified with excavation of foundation pit
On corresponding U-shaped steel sheet pile.
(2) refering to Fig. 2, being enclosed in steel sheet-pile wall carries out excavation of foundation pit in region, after digging down 12 meters, stops excavating, and protects
Stay the part soil body in foundation ditch not dig temporarily, have enough pressure to keep the stake lower end to steel sheet pile 3, it is to avoid in whole excavations
After the completion of, the lower end of steel sheet pile 3 under the pressure of the soil body, bends outside the foundation ditch in foundation ditch, supporting is failed.
In Excavation Process, install enclose purlin at any time, in the present embodiment, enclose purlin and use reinforced concrete fortifield village purlin 5, due to
The present embodiment is circular configuration, and reinforced concrete fortifield village purlin 5 encloses purlin using spiced by steel reinforced concrete formula, that is, enclose purlin by prefabricated reinforcing bar
Concrete purlin is spliced, and enclosing purlin using spiced by steel reinforced concrete formula can improve speed of application, in reinforced concrete fortifield village purlin 5
Installation process in, to be poured between the joint of armored concrete purlin and reinforced concrete fortifield village purlin 5 and steel sheet-pile wall inwall
Note pea gravel concreten.
(3) refering to Fig. 3, in the steel sheet pile coping cast-in-situ steel reinforced concrete cylinder 2 that steel sheet pile 3 is constituted, reinforcing bar is mixed
Solidifying soil cylinder 2 is overlapped with steel sheet-pile wall, forms steel sheet pile open caisson；The height of armored concrete cylinder 2 is 5 meters, thickness is 0.4
Rice, it is 0.5 meter with the lap of splice of steel sheet-pile wall.
(4) refering to Fig. 4, the weight needed for configuring steel sheet pile well sinking on armored concrete cylinder 2 makes steel sheet pile sink
Underground sinks to its 19.5 meters of submergence depth of design；And complete the excavation of foundation ditch and enclose the installation of purlin, under the completion of steel sheet pile open caisson
After heavy, the top end face of armored concrete cylinder 2 is concordant with ground 10.
In Fig. 4, mark 11 represents that foundation ditch completes bottom surface, the i.e. bottom surface of foundation ditch complete design cutting depth.
In the present embodiment, it is divided into weight needed for configuration steel sheet pile well sinking twice, weight configuration and steel is completed for the first time
After sheet pile well sinking, foundation ditch is excavated downwards 2 meters for continuation, then completes second weight configuration, makes steel sheet pile well sinking
19.5 meters of submergence depth is designed to it, the cutting depth of 16 meters of foundation ditch is subsequently completed.In the digging process of foundation ditch, persistently carry out
The installation of reinforced concrete fortifield village purlin 5.
In the present embodiment, in casting reinforced concrete cylinder, the synchronous pre-buried steel on the inwall of armored concrete cylinder 2
Bracket processed 4, to avoid during later stage installation steel bracket, it is necessary to be drilled to armored concrete cylinder 2 or dug wall, this not only increases
Unnecessary work is added, the installation quality of steel bracket can't have been ensured sometimes.
In Fig. 4, A represents design of foundation pit cutting depth, and B represents the height of steel sheet-pile wall, C represent armored concrete cylinder with
The lap of splice of steel sheet-pile wall, F represents the height of armored concrete cylinder, and H represents the design submergence depth of steel sheet pile open caisson；
In the present embodiment, A is 16 meters, and B is 15 meters, and C is 0.5 meter, and F is 5 meters, and H is 19.5 meters.
(5) refering to Fig. 5, after excavation of foundation pit is completed, the succeeding body construction in circularly storehouse is continued, Fig. 5 is bottom in foundation ditch
Plate 6 completes the structure schematic diagram after construction, and steel sheet pile open caisson therein is rounded.
Refering to Fig. 6, Fig. 6 is to complete the structure schematic diagram after excavation of foundation pit and the purlin installation of reinforced concrete fortifield village, in Fig. 6
Local G enlarged drawings are Fig. 7, and in the figure 7, including the steel sheet pile 3 of U-shaped steel sheet pile and bracket steel sheet pile is mutually twisted and connects into steel plate
Piling wall, mark 13 represents the medial surface of steel sheet-pile wall, and mark 14 represents the lateral surface of steel sheet-pile wall；E represents the thickness of steel sheet-pile wall
Degree, i.e. the distance between medial surface and lateral surface of steel sheet-pile wall.In this implementation, the thickness of steel sheet-pile wall is 340 millimeters；In order to
Represent clear, one group of three axes agitating pile machine is only show in the figure 7 soil stirs the profile formed after pine, and with the table of mark 20
Show, in the present embodiment, the width that three axes agitating pile machine stirs the band that loosens the soil of pine is 650 millimeters, be compared with the thickness of steel sheet-pile wall
It is big 310 millimeters, it is effectively guaranteed in construction and monolithic steel sheet pile and steel sheet pile is connected into the smooth pile sinking after screen.
Current, mixing pile machine mainly has two kinds of Double shaft stirring stake machine and three axes agitating pile machine, due to three axes agitating pile machine
High efficiency, three axes agitating pile machine formed the trend of substitution Double shaft stirring stake machine, therefore in the present embodiment, preferentially employed
Three axes agitating pile machine is constructed, ensureing the efficient of engineering construction progress.
In this embodiment, the steel bracket of the bracket steel sheet pile for being used is welded on the lateral surface of the web of U-shaped steel sheet pile
On, according to the actual needs, steel bracket can also be welded on the medial surface of the web of U-shaped steel sheet pile.According to specifically applying
Work requirement, steel sheet pile can also use shape for hat steel sheet pile, and bracket steel sheet pile is made of shape for hat steel sheet pile.
The steel sheet pile for constituting steel sheet-pile wall can use single steel sheet pile, it would however also be possible to employ various steel sheet pile combinations make
With.
In the present embodiment, the top end face of armored concrete cylinder is concordant with ground.The need for according to difference, in steel sheet pile
After open caisson completes, the top end face of armored concrete cylinder may be lower than 0.3~1.0 meter of ground, and add lid at an upper portion thereof
Plate.
Claims (10)
1. a kind of construction method of steel sheet pile open caisson supporting, it is characterised in that with following steps：
(1) stirred to underground with mixing pile machine, soil is stirred into pine, steel sheet pile is inserted in the soil for stirring pine, steel sheet pile is mutually locked shape
Into steel sheet-pile wall；
(2) to enclose carried out in region excavation of foundation pit and assemble in steel sheet-pile wall and enclose purlin, excavation of foundation pit replace with the installation for enclosing purlin into
OK, when foundation ditch bottom surface downwards apart from 2~4 meters of the lower surface of steel sheet pile when, suspend excavation of foundation pit；
(3) the cast-in-situ steel reinforced concrete cylinder at the top of steel sheet-pile wall, armored concrete cylinder is overlapped with steel sheet-pile wall, is formed
Steel sheet pile open caisson；
(4) weight needed for configuring steel sheet pile well sinking on armored concrete cylinder, steel sheet pile well sinking is set to it
Meter submergence depth, and complete the excavation of foundation ditch and enclose the installation of purlin.
2. construction method according to claim 1, it is characterised in that mixing pile machine is higher than base to the bosom that underground stirs
Cheat 0.5~1.5 meter of the designed elevation of bottom surface.
3. construction method according to claim 1, it is characterised in that armored concrete cylinder is long with the overlap joint of steel sheet-pile wall
Spend is 0.3~0.8 meter.
4. construction method according to claim 1, it is characterised in that in step (4), be at least divided into and configure steel plate twice
Weight needed for stake well sinking, after configuration and the steel sheet pile well sinking of weight are completed every time, continues the excavation of foundation ditch and encloses
The installation of purlin.
5. construction method according to claim 1, it is characterised in that the thickness of armored concrete cylinder is 0.3~0.8
Rice.
6. construction method according to claim 1, it is characterised in that the steel sheet pile includes bracket steel sheet pile, the ox
Leg steel sheet pile is that steel bracket is fixed on the side of the web of U-shaped steel sheet pile or shape for hat steel sheet pile to be made, steel ox
The bearing-surface of leg is vertical with the length direction of steel sheet pile.
7. construction method according to claim 1, it is characterised in that the purlin that encloses is by prefabricated armored concrete purlin
The reinforced concrete fortifield village purlin being spliced.
8. construction method according to claim 1, it is characterised in that in casting reinforced concrete cylinder, it is synchronous in steel
Pre-buried steel bracket on the inwall of reinforced concrete cylinder.
9. construction method according to claim 1, it is characterised in that the steel sheet pile open caisson is rounded.
10. any one construction method according to claims 1 to 9, it is characterised in that the mixing pile machine is stirred for three axles
Stake machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN106480890B (en) * | 2016-12-06 | 2018-07-27 | 马鞍山瑞马钢构材料有限公司 | The construction method of steel sheet pile deep basal pit and stiff baseplate settler used |
| CN106948353B (en) * | 2017-05-03 | 2019-06-07 | 中交第二航务工程局有限公司 | A kind of deep water combined steel plate pile cofferdam construction method |
| CN107313435A (en) * | 2017-07-05 | 2017-11-03 | 中铁十局集团第五工程有限公司 | Deep Water Ultra-long steel sheet pile cofferdam construction method |
| RU179256U1 (en) * | 2017-09-12 | 2018-05-07 | Левицкий Валерий Павлович | Reusable lowering well from a profiled sheet for the installation of buried reinforced concrete foundations |
| CN108360897A (en) * | 2018-02-07 | 2018-08-03 | 中国二十冶集团有限公司 | The processing method of mud and drift sand enriching area wash mill |
| CN109183781B (en) * | 2018-11-08 | 2024-02-09 | 大连大学 | Z-shaped steel sheet pile enclosure structure with bent cap |
| CN109826630B (en) * | 2019-02-02 | 2024-04-09 | 上海城建水务工程有限公司 | Precast concrete open caisson device for pipe jacking construction and construction method thereof |
| CN110863505A (en) * | 2019-12-03 | 2020-03-06 | 广州市市政集团有限公司 | Open caisson suitable for geological conditions of deep water-rich sand layer |
| CN111851588A (en) * | 2020-07-14 | 2020-10-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Pipe jacking well structure and construction method thereof |
| CN113186942A (en) * | 2021-05-11 | 2021-07-30 | 中建八局第一建设有限公司 | Pipe jacking well enclosure structure and excavation construction method |
| CN114855824B (en) * | 2022-06-08 | 2024-06-21 | 浙江国进建设有限公司 | Construction method of Larson steel sheet pile of foundation pit |
| CN115045299B (en) * | 2022-07-26 | 2024-02-02 | 杭州市西站枢纽开发有限公司 | Deep foundation pit side wall reinforcing structure with electroosmosis drainage function and construction method |
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| JP2995004B2 (en) * | 1996-06-20 | 1999-12-27 | 株式会社河本建築事務所 | Construction method of retaining wall for dry area |
| CN100489200C (en) * | 2006-05-19 | 2009-05-20 | 中船第九设计研究院 | Large-diameter circular steel-plate cofferdam and its construction method |
| CN202706045U (en) * | 2012-07-05 | 2013-01-30 | 中交二公局第一工程有限公司 | Circular cofferdam |
| CN104988930B (en) * | 2015-07-16 | 2016-09-07 | 中铁大桥局集团有限公司 | It is applicable to the construction method in the combined type cofferdam of Unfavorable geology deep basal pit |
| CN105256810B (en) * | 2015-09-25 | 2017-03-22 | 江苏东合南岩土科技股份有限公司 | Construction method for round underground continuous wall two-in-one structure |
| CN204959796U (en) * | 2015-09-25 | 2016-01-13 | 江苏东合南岩土科技股份有限公司 | Circular underground structure |
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