CN108487255B - Modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method - Google Patents
Modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method Download PDFInfo
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- CN108487255B CN108487255B CN201810104974.2A CN201810104974A CN108487255B CN 108487255 B CN108487255 B CN 108487255B CN 201810104974 A CN201810104974 A CN 201810104974A CN 108487255 B CN108487255 B CN 108487255B
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- stake
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 103
- 239000010959 steel Substances 0.000 title claims abstract description 103
- 238000010276 construction Methods 0.000 title claims abstract description 61
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 238000007569 slipcasting Methods 0.000 claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 35
- 239000004567 concrete Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000009415 formwork Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 30
- 238000009412 basement excavation Methods 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 239000003351 stiffener Substances 0.000 claims 1
- 238000005728 strengthening Methods 0.000 claims 1
- 210000002435 tendon Anatomy 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
Abstract
The invention discloses a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method, construction technology process includes: (1) surveying setting-out fixed pile；(2) it is in place to hang stake, corrects；(3) H profile steel stake is set；(4) layer and section excavates, pile body processing；(5) anchor pole is set " successively, paragraph by paragraph, by root " from top to bottom；(6) it is in place to hang stake for prefabricated board wall；(7) it is inserted into reinforcing rib, and secured with the binding of prefabricated board wall protruding bar；(8) " layer and section " high-pressure slip-casting is constructed；(9) node slightly expanded concrete is perfused；(10) step (4)-(9) construction is repeated；(11) waist beam steel bar colligation, formwork erection, filling concrete；(12) acceptance.The present invention realizes foundation pit enclosure structure system prefabricated construction, can effectively save a certain amount of duration, securely and reliably, the double action with earth-retaining and sealing.
Description
Technical field
The present invention relates to a kind of foundation pit enclosure structure construction methods, and in particular to a kind of modified H profile steel anchor pole composite pile-
Prefabricated board wall base pit enclosure construction method.
Background technique
In deep basal pit and other underground engineering constructions, it is commonly encountered deep foundation pit support problem, excavates that difficulty is big, the duration
It is long, costly, the 10%-20% of basic civil engineering total cost is typically constituted from, the cost of big deep-foundation pit engineering becomes up to 30%-40%
A critically important research topic in urban construction.Cause Construction of Deep Excavation Engineering cost high the type selecting of building enclosure
How one of key factor, can be under the premise of guaranteeing deep basal pit safe construction, and saving construction cost to the greatest extent is
The important directions that we need to study can be recycled all or part of building enclosure and recycle, from new technical measures and work
Skill novel aspects, which are broken through, has certain realistic meaning to reduction Construction of Deep Excavation Engineering cost and duration.
Summary of the invention
Goal of the invention: the present invention aiming at the shortcomings in the prior art, proposes that one kind is simple to operate, realizes foundation pit and enclose
Protection structure system prefabricated construction can effectively save a certain amount of duration, the modified H-type of the double action with earth-retaining and sealing
Steel anchor rod composite pile-prefabricated board wall base pit enclosure construction method.
Technical solution: a kind of modified H profile steel anchor pole composite pile-prefabricated board wall foundation pit enclosure structure of the present invention is applied
Work method, including following below scheme step:
(1) surveying setting-out fixed pile: accurate to survey the plan-position for setting H profile steel stake before foundation pit system construction, plane is missed
Within 5mm, every pile position is surveyed to set and be finished, and the safeguard measure in site is carried out for difference control, prevents human factor from influencing later period stake
Body set after position deviation；
(2) it is in place to hang stake, corrects: before H profile steel stake is set, pile body being hung according to the pile cutoff that plant design makes rise just first
Position, and the plan-position in site is checked, it waits pile body to set, the stake site for occurring more than design and code requirement is rectified in time
Overgauge；
(3) H profile steel stake is set: the H profile steel stake of use makes in factory's centralized production, when live H profile steel stake is set, uses
Static piling construction, pile body set often set that 2m checks pile body set plane and perpendicularity deviation, wherein verticality
Deviation controls within 1%, is corrected to there is the pile body that perpendicularity deviation is more than 1%, the pile pulling grout weight if being difficult to correct
It beats；
(4) layer and section excavates, and pile body processing: H profile steel stake, which is set, to be finished, layer and section excavation pit soil layer, every layer of digging
Native depth is 2-3m, and sand biggish for moisture content, silt, every layer of excavation thickness control is within 2m, soil layer stage excavation
In the process, pile body is reinforced anchor pole and is also set immediately, and side is cut the earth, while anchor pole is set, to reinforce the entirety between pile body and soil layer
Property；On the other hand, anchor pole need to clean out in time the attached soil of pile body, with cutting the earth before pile body is set to ala lateralis in H profile steel stake
The soil body in reserved bolthole on listrium is removed completely, in the case where there is boulder subcase, need to be removed completely, be used when necessary
Drilling machine auxiliary cleaning；
(5) " successively, paragraph by paragraph, by root " sets anchor pole from top to bottom: anchor pole set follow from top to bottom " successively, paragraph by paragraph, by
Root " is set, and in work progress, soil layer, which is excavated, sets two good harmony of work holding, strict control soil with pile body anchor pole
The depth that layer excavates, there is not allowed that phenomenon of backbreaking；
(6) it is in place to hang stake for prefabricated board wall: prefabricated board wall is prefabricated using producing in factory's centrality, effectively realizes assembled
Application of the building technology in foundation pit enclosure, the prefabricated board wall lifting of bottom of foundation ditch first segment can be in place from top vertical lifting, under
The prefabricated board wall of human assistance is needed to nest into adjacent two H profile steels stake when the prefabricated board wall lifting of other sections of portion；If foundation excavation
When depth is less than or equal to 6m, in the case where ensuring to design H profile steel stake earth-retaining bearing capacity, by all sections of prefabricated board wall from top
Portion's lifting construction, prefabricated board wall are excavated with soil layer, are sunk paragraph by paragraph in place by self weight and the heavy load set of upper end board wall lifting；
Stay the rear pouring concrete section of 250-350mm between the two sections of prefabricated board walls in left and right, after pour the adjacent two prefabricated board wall steel in left and right in section
Muscle is fixedly connected；
(7) it is inserted into reinforcing rib, and secured with the binding of prefabricated board wall protruding bar: for the globality for enhancing building enclosure, to
After prefabricated board wall lifting construction in foundation pit, steel is reinforced in insertion at the connecting node between prefabricated board wall and H profile steel stake
Muscle, reinforcing rib and the binding of prefabricated board wall protruding bar are secured；
(8) " layer and section " high-pressure slip-casting is constructed: when construction, high-pressure slip-casting is from the high-pressure slip-casting hole of prefabricated board wall bottom
Successively construction paragraph by paragraph, every section of prefabricated board wall slip casting symmetrical two direction to the left and right from the middle part high-pressure slip-casting hole of prefabricated board wall bottom
Carry out slip casting work, i.e. the symmetrical slip casting " from middle part to two sides ", grouting pressure is not less than 0.6MPa, and slip casing by pressure is using multiple
Method that ftercompction is pressurizeed step by step carries out slip casting, and slurry is closely knit between the prefabricated board wall of final slip casting guarantee and soil layer, makes slurry
It can penetrate into soil layer not less than 100mm；
(9) node slightly expanded concrete is perfused: in work progress, being filled at the node between H profile steel stake and prefabricated board wall
Node slightly expanded concrete is infused, node slightly expanded concrete intensity is not less than C40, while at least than prefabricated board wall concrete strength
A high grade；
(10) step (4)-(9) construction is repeated；
(11) waist beam steel bar colligation, formwork erection, filling concrete: when the prefabricated board wall construction of two sections finishes, upper
One cast-in-situ steel reinforced concrete waist rail is set between lower two sections of prefabricated board walls, and waist rail reinforcing bar is connect with prefabricated board wall protruding bar, waist
Beam longitudinal reinforcement uses the above reinforcing bar of second level of diameter 8mm using the above reinforcing bar of three-level for being no less than 4 diameter 20mm, stirrup,
Stirrup spacing is not more than 200mm, and in waist rail reinforcing bar process of binding, upper and lower two prefabricated board wall protruding bar anchors into the length in waist rail
Not less than 1.5LaE, waist rail reinforcing bar is welded at H profile steel stake using welding method and H profile steel stake web；
(12) acceptance.
Further, in step (3) under the premise of meeting foundation pit bearing capacity calculation, the edge of a wing board width of H profile steel stake is not
It obtains and is less than 350mm, edge of a wing plate thickness is not less than 20mm, and the web height of H profile steel stake is bigger than the thickness of the prefabricated board wall of use
60mm, in order to the piecewise lifting construction of prefabricated board wall, while the web thickness of H profile steel stake is not less than 30mm.
Further, pile cutoff connection uses welded connecting in step (3).
It further, is the construction convenient for anchor pole in step (5), anchor pole replaces conventional anchor using steel strand wires, and anchor pole is straight
Diameter is at least 10mm smaller than the preformed hole on flange plate on the inside of H profile steel stake, or using the opposite position of outer side wing edge plate in H profile steel stake
The preformed hole for setting anchor bolt construction is stayed at the place of setting, and facilitates setting for later period anchor pole, and the preformed hole on interior outer side wing edge plate also at least compares
The big 10mm of bolt diameter；Wherein, bolt diameter is not less than 12mm, and rock-bolt length is determined according to load capacity calculation, is set to H profile steel stake
The every middle side part of edge of a wing plate face, along H profile steel pile length direction arrange, spacing be no more than 1.5m, above and below every section of prefabricated board wall
Anchor pole encrypts in 2000mm at the pile body of junction, and encrypted section spacing is no more than 0.6m.
Further, the design thickness of prefabricated board wall is not less than 100mm in step (6), and every section of board wall design width should compare
Small (0.5 × H profile steel stake edge of a wing board width+50) mm of spacing between two neighboring H profile steel stake web.
Further, reinforcing rib diameter is not less than 20mm, and no less than 2 in step (7).
Further, step (8) middle-high pressure grouting hole is arranged at every section of prefabricated above 300mm in board wall bottom, every 1.2m
One high-pressure slip-casting hole is set, and every section of prefabricated board wall bottom is no less than 2 high-pressure slip-casting holes, and high-pressure slip-casting hole uses steel bushing system
Make, is integrated into factory's centralization production with prefabricated board wall, the diameter in high-pressure slip-casting hole is preferably 20mm.
Further, in step (11) after the adjacent two prefabricated board wall in left and right at pouring concrete, the encryption of waist rail stirrup, encryption
Area is not less than 600mm, and encrypted area stirrup spacing is not more than 100mm.
Further, in step (11) waist rail reinforcing bar at H profile steel stake using on H profile steel stake web preformed hole side
Method, setting diameter are connected and fixed not less than the perforation reinforcing bar of 16mm with prefabricated board wall protruding bar, the radical of reinforcing bar of perforating according to
Practical Project concrete condition is determined by calculation.
The utility model has the advantages that operation of the present invention is simple and convenient, and it is safe and reliable secured, realize foundation pit enclosure structure system assembling
Construction, can effectively save a certain amount of duration, the double action with earth-retaining and sealing.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Embodiment
A kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method, including following below scheme step
It is rapid:
(1) surveying setting-out fixed pile: accurate to survey the plan-position for setting H profile steel stake before foundation pit system construction, plane is missed
Within 5mm, every pile position is surveyed to set and be finished, and the safeguard measure in site is carried out for difference control, prevents human factor from influencing later period stake
Body set after position deviation；
(2) it is in place to hang stake, corrects: before H profile steel stake is set, pile body being hung according to the pile cutoff that plant design makes rise just first
Position, and the plan-position in site is checked, it waits pile body to set, the stake site for occurring more than design and code requirement is rectified in time
Overgauge；
(3) H profile steel stake is set: the H profile steel stake of use makes in factory's centralized production, when live H profile steel stake is set, uses
Static piling construction, pile body set often set that 2m checks pile body set plane and perpendicularity deviation, wherein verticality
Deviation controls within 1%, is corrected to there is the pile body that perpendicularity deviation is more than 1%, the pile pulling grout weight if being difficult to correct
It beats；
Under the premise of meeting foundation pit bearing capacity calculation, the edge of a wing board width of H profile steel stake cannot be less than 350mm, flange plate
Thickness is not less than 20mm, and the web height of H profile steel stake is 60mm bigger than the thickness of the prefabricated board wall of use, in order to prefabricated board wall
Piecewise lifting construction, while the web thickness of H profile steel stake is not less than 30mm.Pile cutoff connection is using welded connecting.
(4) layer and section excavates, and pile body processing: H profile steel stake, which is set, to be finished, layer and section excavation pit soil layer, every layer of digging
Native depth is 2-3m, and sand biggish for moisture content, silt, every layer of excavation thickness control is within 2m, soil layer stage excavation
In the process, pile body is reinforced anchor pole and is also set immediately, and side is cut the earth, while anchor pole is set, to reinforce the entirety between pile body and soil layer
Property；On the other hand, anchor pole need to clean out in time the attached soil of pile body, with cutting the earth before pile body is set to ala lateralis in H profile steel stake
The soil body in reserved bolthole on listrium is removed completely, in the case where there is boulder subcase, need to be removed completely, be used when necessary
Drilling machine auxiliary cleaning；
(5) " successively, paragraph by paragraph, by root " sets anchor pole from top to bottom: anchor pole set follow from top to bottom " successively, paragraph by paragraph, by
Root " is set, and in work progress, soil layer, which is excavated, sets two good harmony of work holding, strict control soil with pile body anchor pole
The depth that layer excavates, there is not allowed that phenomenon of backbreaking；
For the construction convenient for anchor pole, anchor pole replaces conventional anchor using steel strand wires, and bolt diameter is at least than on the inside of H profile steel stake
The small 10mm of preformed hole on flange plate, or anchor bolt construction is set using staying at outer side wing edge plate relative position in H profile steel stake
Preformed hole, facilitate setting for later period anchor pole, the preformed hole on interior outer side wing edge plate is also at least 10mm bigger than bolt diameter；Its
In, bolt diameter is not less than 12mm, and rock-bolt length is determined according to load capacity calculation, is set in the every side of edge of a wing plate face of H profile steel stake
Portion arranges that spacing is no more than 1.5m, at the pile body that every section of prefabricated board wall is vertically connected with place along H profile steel pile length direction
Anchor pole encrypts in 2000mm, and encrypted section spacing is no more than 0.6m.
(6) it is in place to hang stake for prefabricated board wall: prefabricated board wall is prefabricated using producing in factory's centrality, effectively realizes assembled
Application of the building technology in foundation pit enclosure, the prefabricated board wall lifting of bottom of foundation ditch first segment can be in place from top vertical lifting, under
The prefabricated board wall of human assistance is needed to nest into adjacent two H profile steels stake when the prefabricated board wall lifting of other sections of portion；If foundation excavation
When depth is less than or equal to 6m, in the case where ensuring to design H profile steel stake earth-retaining bearing capacity, by all sections of prefabricated board wall from top
Portion's lifting construction, prefabricated board wall are excavated with soil layer, are sunk paragraph by paragraph in place by self weight and the heavy load set of upper end board wall lifting；
Stay the rear pouring concrete section of 250-350mm between the two sections of prefabricated board walls in left and right, after pour the adjacent two prefabricated board wall steel in left and right in section
Muscle is fixedly connected；
The design thickness of prefabricated board wall is not less than 100mm, and every section of board wall design width should be than two neighboring H profile steel stake web
Between small (0.5 × H profile steel stake edge of a wing board width+50) mm of spacing.
(7) it is inserted into reinforcing rib, and secured with the binding of prefabricated board wall protruding bar: for the globality for enhancing building enclosure, to
After prefabricated board wall lifting construction in foundation pit, steel is reinforced in insertion at the connecting node between prefabricated board wall and H profile steel stake
Muscle, reinforcing rib and the binding of prefabricated board wall protruding bar are secured；Reinforcing rib diameter is not less than 20mm, and no less than 2.
(8) " layer and section " high-pressure slip-casting is constructed: when construction, high-pressure slip-casting is from the high-pressure slip-casting hole of prefabricated board wall bottom
Successively construction paragraph by paragraph, every section of prefabricated board wall slip casting symmetrical two direction to the left and right from the middle part high-pressure slip-casting hole of prefabricated board wall bottom
Carry out slip casting work, i.e. the symmetrical slip casting " from middle part to two sides ", grouting pressure is not less than 0.6MPa, and slip casing by pressure is using multiple
Method that ftercompction is pressurizeed step by step carries out slip casting, and slurry is closely knit between the prefabricated board wall of final slip casting guarantee and soil layer, makes slurry
It can penetrate into soil layer not less than 100mm；
High-pressure slip-casting hole is arranged at every section of prefabricated above 300mm in board wall bottom, and a high-pressure slip-casting hole is arranged in every 1.2m,
Every section of prefabricated board wall bottom is no less than 2 high-pressure slip-casting holes, and high-pressure slip-casting hole is made of steel bushing, produces in factory's centralization
When be integrated into prefabricated board wall, the diameter in high-pressure slip-casting hole is preferably 20mm.
(9) node slightly expanded concrete is perfused: in work progress, being filled at the node between H profile steel stake and prefabricated board wall
Node slightly expanded concrete is infused, node slightly expanded concrete intensity is not less than C40, while at least than prefabricated board wall concrete strength
A high grade；
(10) step (4)-(9) construction is repeated；
(11) waist beam steel bar colligation, formwork erection, filling concrete: when the prefabricated board wall construction of two sections finishes, upper
One cast-in-situ steel reinforced concrete waist rail is set between lower two sections of prefabricated board walls, and waist rail reinforcing bar is connect with prefabricated board wall protruding bar, waist
Beam longitudinal reinforcement uses the above reinforcing bar of second level of diameter 8mm using the above reinforcing bar of three-level for being no less than 4 diameter 20mm, stirrup,
Stirrup spacing is not more than 200mm, and in waist rail reinforcing bar process of binding, upper and lower two prefabricated board wall protruding bar anchors into the length in waist rail
Not less than 1.5LaE, waist rail reinforcing bar is welded at H profile steel stake using welding method and H profile steel stake web；
After the adjacent two prefabricated board wall in left and right at pouring concrete, waist rail stirrup encryption, encrypted area is not less than 600mm, encryption
Area's stirrup spacing is not more than 100mm.Waist rail reinforcing bar is at H profile steel stake using the method for the preformed hole on H profile steel stake web, setting
Perforation reinforcing bar of the diameter not less than 16mm is connected and fixed with prefabricated board wall protruding bar, and the radical for reinforcing bar of perforating is according to Practical Project
Concrete condition is determined by calculation.
(12) acceptance.
Operation of the present invention is simple and convenient, safe and reliable secured, realizes foundation pit enclosure structure system prefabricated construction, can have
Effect saves a certain amount of duration, the double action with earth-retaining and sealing.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention
Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (8)
1. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method, it is characterised in that: including
Following below scheme step:
(1) surveying setting-out fixed pile: accurate to survey the plan-position for setting H profile steel stake, plane error control before foundation pit system construction
System within 5mm, survey to set and finish, and carries out the safeguard measure in site by every pile position, prevents human factor from influencing later period pile body and beats
Position deviation after if；
(2) it is in place to hang stake, corrects: before H profile steel stake is set, pile body being hung according to the pile cutoff that plant design makes rise in place first,
And the plan-position in site is checked, it waits pile body to set, the stake site for occurring more than design and code requirement is corrected in time
Deviation；
(3) H profile steel stake is set: the H profile steel stake of use makes in factory's centralized production, when live H profile steel stake is set, using static(al)
The construction of piling method, pile body set often set that 2m checks pile body set plane and perpendicularity deviation, wherein perpendicularity deviation
Control is corrected, pile pulling grout is beaten again if being difficult to correct within 1% to there is the pile body that perpendicularity deviation is more than 1%；
(4) layer and section excavates, and pile body processing: H profile steel stake, which is set, to be finished, layer and section excavation pit soil layer, and every layer of shoveling is deep
Degree is 2-3m, and sand biggish for moisture content, silt, every layer of excavation thickness control is within 2m, soil layer stage excavation process
In, pile body is reinforced anchor pole and is also set immediately, and side is cut the earth, while anchor pole is set, to reinforce the globality between pile body and soil layer；Separately
On the one hand, anchor pole need to clean out in time the attached soil of pile body, with cutting the earth before pile body is set to outer side wing edge plate in H profile steel stake
On reserved bolthole in the soil body remove clean, in the case where there is boulder subcase, need to remove clean, use drilling machine when necessary
Auxiliary cleaning；
(5) set anchor pole " successively, paragraph by paragraph, by root " from top to bottom: anchor pole, which is set, to be followed from top to bottom " successively, paragraph by paragraph, by root "
It sets, in work progress, soil layer, which is excavated, sets two good harmony of work holding with pile body anchor pole, and strict control soil layer is opened
The depth of digging, there is not allowed that phenomenon of backbreaking；
(6) it is in place to hang stake for prefabricated board wall: prefabricated board wall is prefabricated using producing in factory's centrality, effectively realizes assembled construction
Application of the technology in foundation pit enclosure, the prefabricated board wall lifting of bottom of foundation ditch first segment can be in place from top vertical lifting, lower part its
The prefabricated board wall of human assistance is needed to nest into adjacent two H profile steels stake when the prefabricated board wall lifting of his section；If foundation excavation depth
When less than or equal to 6m, in the case where ensuring to design H profile steel stake earth-retaining bearing capacity, all sections of prefabricated board wall is hung from top
Dress construction, prefabricated board wall are excavated with soil layer, are sunk paragraph by paragraph in place by self weight and the heavy load set of upper end board wall lifting；Left and right
The rear pouring concrete section of 250-350mm is stayed between two sections of prefabricated board walls, after to pour the adjacent two prefabricated board wall reinforcing bar in left and right in section solid
Fixed connection；
(7) it is inserted into reinforcing rib, and secured with the binding of prefabricated board wall protruding bar: for the globality for enhancing building enclosure, to foundation pit
After interior prefabricated board wall lifting construction, it is inserted into stiffener at the connecting node between prefabricated board wall and H profile steel stake, adds
Strengthening tendons and the binding of prefabricated board wall protruding bar are secured；
(8) " layer and section " high-pressure slip-casting is constructed: when construction, high-pressure slip-casting is layer-by-layer from the high-pressure slip-casting hole of prefabricated board wall bottom
Construction paragraph by paragraph, symmetrically two directions are carried out to the left and right from the middle part high-pressure slip-casting hole of prefabricated board wall bottom for every section of prefabricated board wall slip casting
Slip casting work, the i.e. symmetrical slip casting " from middle part to two sides ", grouting pressure are not less than 0.6MPa, and slip casing by pressure uses multiple ftercompction
The method pressurizeed step by step carries out slip casting, and slurry is closely knit between the prefabricated board wall of final slip casting guarantee and soil layer, makes slurry can be with
It penetrates into soil layer not less than 100mm；
(9) node slightly expanded concrete is perfused: in work progress, section being perfused at the node between H profile steel stake and prefabricated board wall
Point slightly expanded concrete, node slightly expanded concrete intensity are not less than C40, while at least higher by one than prefabricated board wall concrete strength
A grade；
(10) step (4)-(9) construction is repeated；
(11) waist beam steel bar colligation, formwork erection, filling concrete: when the prefabricated board wall construction of two sections finishes, upper and lower two
A cast-in-situ steel reinforced concrete waist rail is set between the prefabricated board wall of section, waist rail reinforcing bar is connect with prefabricated board wall protruding bar, and waist rail is vertical
To reinforcing bar using the above reinforcing bar of three-level for being no less than 4 diameter 20mm, stirrup uses the above reinforcing bar of second level of diameter 8mm, stirrup
Spacing is not more than 200mm, and in waist rail reinforcing bar process of binding, it is not small that upper and lower two prefabricated board wall protruding bar anchors into the length in waist rail
In 1.5LaE, waist rail reinforcing bar is welded at H profile steel stake using welding method and H profile steel stake web；
(12) acceptance.
2. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side according to claim 1
Method, it is characterised in that: in the step (3) under the premise of meeting foundation pit bearing capacity calculation, the edge of a wing board width of H profile steel stake is not
It obtains and is less than 350mm, edge of a wing plate thickness is not less than 20mm, and the web height of H profile steel stake is bigger than the thickness of the prefabricated board wall of use
60mm, in order to the piecewise lifting construction of prefabricated board wall, while the web thickness of H profile steel stake is not less than 30mm.
3. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side according to claim 1
Method, it is characterised in that: pile cutoff connection is using welded connecting in the step (3).
4. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side according to claim 1
Method, it is characterised in that: be the construction convenient for anchor pole in the step (5), anchor pole replaces conventional anchor using steel strand wires, and anchor pole is straight
Diameter is at least 10mm smaller than the preformed hole on flange plate on the inside of H profile steel stake, or using the opposite position of outer side wing edge plate in H profile steel stake
The preformed hole for setting anchor bolt construction is stayed at the place of setting, and facilitates setting for later period anchor pole, and the preformed hole on interior outer side wing edge plate also at least compares
The big 10mm of bolt diameter；Wherein, bolt diameter is not less than 12mm, and rock-bolt length is determined according to load capacity calculation, is set to H profile steel stake
The every middle side part of edge of a wing plate face, along H profile steel pile length direction arrange, spacing be no more than 1.5m, above and below every section of prefabricated board wall
Anchor pole encrypts in 2000mm at the pile body of junction, and encrypted section spacing is no more than 0.6m.
5. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side according to claim 1
Method, it is characterised in that: reinforcing rib diameter is not less than 20mm, and no less than 2 in the step (7).
6. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side according to claim 1
Method, it is characterised in that: step (8) the middle-high pressure grouting hole is arranged at every section of prefabricated above 300mm in board wall bottom, every 1.2m
One high-pressure slip-casting hole is set, and every section of prefabricated board wall bottom is no less than 2 high-pressure slip-casting holes, and high-pressure slip-casting hole uses steel bushing system
Make, is integrated into factory's centralization production with prefabricated board wall, the diameter in high-pressure slip-casting hole is preferably 20mm.
7. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side according to claim 1
Method, it is characterised in that: in the step (11) after the adjacent two prefabricated board wall in left and right at pouring concrete, the encryption of waist rail stirrup adds
Mi Qu is not less than 600mm, and encrypted area stirrup spacing is not more than 100mm.
8. a kind of modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side according to claim 1
Method, it is characterised in that: waist rail reinforcing bar is at H profile steel stake using the side of the preformed hole on H profile steel stake web in the step (11)
Method, setting diameter are connected and fixed not less than the perforation reinforcing bar of 16mm with prefabricated board wall protruding bar, the radical of reinforcing bar of perforating according to
Practical Project concrete condition is determined by calculation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104974.2A CN108487255B (en) | 2018-02-02 | 2018-02-02 | Modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104974.2A CN108487255B (en) | 2018-02-02 | 2018-02-02 | Modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method |
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| CN108487255A CN108487255A (en) | 2018-09-04 |
| CN108487255B true CN108487255B (en) | 2019-11-26 |
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| JPH11222861A (en) * | 1998-02-04 | 1999-08-17 | Shimizu Corp | Execution of retaining wall to existing banking and retaining wall executed by the same |
| CN201228356Y (en) * | 2008-06-10 | 2009-04-29 | 北京六建集团公司 | Pit anchored pile-anchor breast wall concrete middle beam structure |
| WO2010002076A1 (en) * | 2008-07-01 | 2010-01-07 | Dongjin Construction Co., Ltd. | Caisson structures for underground soil blocking and manufacturing method of anti-noise non-vibration caisson structures using thereof |
| CN103266604A (en) * | 2013-05-03 | 2013-08-28 | 中冶集团武汉勘察研究院有限公司 | Hoop-type circular-section anchor-rod slide-resistant pile and construction method thereof |
| CN106498950A (en) * | 2016-12-21 | 2017-03-15 | 大连交通大学 | Anchor head is placed in the Pile-Anchor Supporting for Deep Excavation system and its implementation of pile body |
| CN206408630U (en) * | 2016-12-21 | 2017-08-15 | 大连交通大学 | Anchor head is placed in the Pile-Anchor Supporting for Deep Excavation system of pile body |
-
2018
- 2018-02-02 CN CN201810104974.2A patent/CN108487255B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11222861A (en) * | 1998-02-04 | 1999-08-17 | Shimizu Corp | Execution of retaining wall to existing banking and retaining wall executed by the same |
| CN201228356Y (en) * | 2008-06-10 | 2009-04-29 | 北京六建集团公司 | Pit anchored pile-anchor breast wall concrete middle beam structure |
| WO2010002076A1 (en) * | 2008-07-01 | 2010-01-07 | Dongjin Construction Co., Ltd. | Caisson structures for underground soil blocking and manufacturing method of anti-noise non-vibration caisson structures using thereof |
| CN103266604A (en) * | 2013-05-03 | 2013-08-28 | 中冶集团武汉勘察研究院有限公司 | Hoop-type circular-section anchor-rod slide-resistant pile and construction method thereof |
| CN106498950A (en) * | 2016-12-21 | 2017-03-15 | 大连交通大学 | Anchor head is placed in the Pile-Anchor Supporting for Deep Excavation system and its implementation of pile body |
| CN206408630U (en) * | 2016-12-21 | 2017-08-15 | 大连交通大学 | Anchor head is placed in the Pile-Anchor Supporting for Deep Excavation system of pile body |
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| CN108487255A (en) | 2018-09-04 |
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