CN108222017B - A kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method - Google Patents
A kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method Download PDFInfo
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- CN108222017B CN108222017B CN201810104977.6A CN201810104977A CN108222017B CN 108222017 B CN108222017 B CN 108222017B CN 201810104977 A CN201810104977 A CN 201810104977A CN 108222017 B CN108222017 B CN 108222017B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 94
- 239000010959 steel Substances 0.000 title claims abstract description 94
- 238000010276 construction Methods 0.000 title claims abstract description 58
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 37
- 239000004567 concrete Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000009415 formwork Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 39
- 239000002689 soil Substances 0.000 claims description 33
- 238000009412 basement excavation Methods 0.000 claims description 16
- 238000013461 design Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 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
- 238000007689 inspection Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000011378 shotcrete Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 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
Abstract
The invention discloses a kind of 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) high-pressure injection concrete topping；(7) it is in place to hang stake for prefabricated board wall；(8) it is inserted into reinforcing rib, and secured with the binding of prefabricated board wall protruding bar；(9) node slightly expanded concrete is perfused；(10) joint treatment；(11) step (4)-(10) construction is repeated；(12) waist beam steel bar colligation, formwork erection, filling concrete；(13) 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 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 a kind of simple to operate, safe and reliable jail
Gu realizing foundation pit enclosure structure system prefabricated construction, a certain amount of duration can be effectively saved, it is dual with earth-retaining and sealing
The H profile steel anchor pole composite pile of effect-prefabricated board wall base pit enclosure construction method.
A kind of technical solution: H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure structure construction side of the present invention
Method, including following below scheme step:
(1) surveying setting-out fixed pile: it is accurate first to survey the plan-position for setting H profile steel stake before foundation pit system construction, it puts down
Surface error controls within 5mm, every H-type steel pile position is surveyed set after, carry out the safeguard measure in site, prevent it is artificial because
Element influences the position deviation after later period pile body is set；
(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, 2m pile body of inspection is often set when pile body is set sets plane and perpendicularity deviation, wherein vertically
Deviation control is spent within 1%, is corrected to there is the pile body that perpendicularity deviation is more than 1%, the pile pulling grout if being difficult to correct
It beats again；
(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 the sand big for moisture content, silt, every layer of excavation thickness control is within 2m, soil layer stage excavation mistake
Cheng Zhong, pile body are reinforced anchor pole and are 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 is cleaned out the attached soil of pile body, with cutting the earth before pile body is set on outer side wing edge plate in H profile steel stake in time
Reserved bolthole in the soil body remove clean, in the case where there is boulder subcase, further to remove clean, use 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) high-pressure injection concrete topping: to enhance the harmony of entire structural protective system stress and reaching water proof
Effect sprays one of concrete topping on excavating soil layer vertical plane using high-pressure spray gun before hoisting prefabricated board wall, while
The thickness of gunite concrete surface layer is depending on practical the case where excavating situation and the installation of prefabricated board wall later period in excavation face；
(7) 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 of bottom of foundation ditch first segment lift, lower part in place from top vertical lifting
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；If foundation excavation is deep
When degree≤6m, in the case where ensuring H profile steel stake earth-retaining bearing capacity, by all sections of prefabricated board wall from top lifting construction,
Prefabricated board wall is excavated with soil layer, is sunk paragraph by paragraph in place by self weight and the heavy load set of upper end board wall lifting, two sections of left and right is pre-
There are the rear pouring concrete section of 250-350mm between making sheet wall, after the adjacent two prefabricated board wall reinforcing bar in left and right that pours in section reliably connect
It connects；
(8) 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, reinforcing rib is inserted at the connecting node between prefabricated board wall and H profile steel stake,
The binding of the protruding bar of reinforcing rib and prefabricated board wall is secured；
(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 concrete intensity is not less than C40, and than prefabricated board wall concrete strength at least high one etc.
Grade；
(10) joint treatment: after to all of above work construction, to the tightness degree between prefabricated board wall and soil layer
It is checked comprehensively, if find that prefabricated board wall and soil layer seam occur local untight, modulation cement mortar is filled
Envelope, the intensity of cement mortar are not less than M15, and mortar slump controls between 100-150mm；
(11) step (4)-(10) construction is repeated；
(12) 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, waist rail reinforcing bar and prefabricated board wall protruding bar have connection,
Waist rail longitudinal reinforcement uses the above steel of second level of diameter 8mm using the above reinforcing bar of three-level for being no less than 4 and diameter 20mm, stirrup
Muscle, stirrup spacing is not more than 200mm, and in waist rail reinforcing bar process of binding, the prefabricated board wall protruding bar of two sections is anchored into waist rail
Length be 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；
(13) 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 at least compares anchor
The big 10mm of shank diameter.
Further, the design thickness of prefabricated board wall is not less than 100mm in step (7), 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 (8).
Further, in step (12) after the adjacent two sections of prefabricated board walls in left and right at pouring concrete, waist rail stirrup needs to encrypt,
Encrypted area is not less than 600mm, and encrypted area stirrup spacing is not more than 100mm.
Further, in step (12) 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 H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method, including following below scheme step:
(1) surveying setting-out fixed pile: it is accurate first to survey the plan-position for setting H profile steel stake before foundation pit system construction, it puts down
Surface error controls within 5mm, every H-type steel pile position is surveyed set after, carry out the safeguard measure in site, prevent it is artificial because
Element influences the position deviation after later period pile body is set；
(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, 2m pile body of inspection is often set when pile body is set sets plane and perpendicularity deviation, wherein vertically
Deviation control is spent within 1%, is corrected to there is the pile body that perpendicularity deviation is more than 1%, the pile pulling grout if being difficult to correct
It beats again；
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 the sand big for moisture content, silt, every layer of excavation thickness control is within 2m, soil layer stage excavation mistake
Cheng Zhong, pile body are reinforced anchor pole and are 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 is cleaned out the attached soil of pile body, with cutting the earth before pile body is set on outer side wing edge plate in H profile steel stake in time
Reserved bolthole in the soil body remove clean, in the case where there is boulder subcase, further to remove clean, use 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 at least 10mm bigger than bolt diameter.
(6) high-pressure injection concrete topping: to enhance the harmony of entire structural protective system stress and reaching water proof
Effect sprays one of concrete topping on excavating soil layer vertical plane using high-pressure spray gun before hoisting prefabricated board wall, while
The thickness of gunite concrete surface layer is depending on practical the case where excavating situation and the installation of prefabricated board wall later period in excavation face；
(7) 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 of bottom of foundation ditch first segment lift, lower part in place from top vertical lifting
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；If foundation excavation is deep
When degree≤6m, in the case where ensuring H profile steel stake earth-retaining bearing capacity, by all sections of prefabricated board wall from top lifting construction,
Prefabricated board wall is excavated with soil layer, is sunk paragraph by paragraph in place by self weight and the heavy load set of upper end board wall lifting, two sections of left and right is pre-
There are the rear pouring concrete section of 250-350mm between making sheet wall, after the adjacent two prefabricated board wall reinforcing bar in left and right that pours in section reliably connect
It connects；
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.
(8) 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, reinforcing rib is inserted at the connecting node between prefabricated board wall and H profile steel stake,
The binding of the protruding bar of reinforcing rib and prefabricated board wall is secured；Reinforcing rib diameter is not less than 20mm, and no less than 2.
(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 concrete intensity is not less than C40, and than prefabricated board wall concrete strength at least high one etc.
Grade；
(10) joint treatment: after to all of above work construction, to the tightness degree between prefabricated board wall and soil layer
It is checked comprehensively, if find that prefabricated board wall and soil layer seam occur local untight, modulation cement mortar is filled
Envelope, the intensity of cement mortar are not less than M15, and mortar slump controls between 100-150mm；
(11) step (4)-(10) construction is repeated；
(12) 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, waist rail reinforcing bar and prefabricated board wall protruding bar have connection,
Waist rail longitudinal reinforcement uses the above steel of second level of diameter 8mm using the above reinforcing bar of three-level for being no less than 4 and diameter 20mm, stirrup
Muscle, stirrup spacing is not more than 200mm, and in waist rail reinforcing bar process of binding, the prefabricated board wall protruding bar of two sections is anchored into waist rail
Length be 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 sections of prefabricated board walls in left and right at pouring concrete, waist rail stirrup needs to encrypt, and encrypted area is not less than 600mm,
Encrypted area stirrup spacing is not more than 100mm.The method that waist rail reinforcing bar uses the preformed hole on H profile steel stake web at H profile steel stake,
Perforation reinforcing bar of the diameter not less than 16mm is arranged to be connected and fixed with prefabricated board wall protruding bar, the radical for reinforcing bar of perforating is according to reality
Engineering concrete condition is determined by calculation.
(13) 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 (7)
1. a kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method, it is characterised in that: including to flow down
Journey step:
(1) surveying setting-out fixed pile: before foundation pit system construction, accurate first to survey the plan-position for setting H profile steel stake, plane is missed
Difference control after every H-type steel pile position survey is set, carries out the safeguard measure in site, prevents human factor shadow within 5mm
Ring the position deviation after later period pile body is set；
(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, 2m pile body of inspection is often set when pile body is set sets plane and perpendicularity deviation, and wherein verticality is inclined
Difference control is corrected, the pile pulling grout weight if being difficult to correct within 1% to there is the pile body that perpendicularity deviation is more than 1%
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, and every layer of shoveling is deep
Degree is 2-3m, and the sand big for moisture content, silt, every layer of excavation thickness control is within 2m, during soil layer stage excavation,
Pile body is reinforced anchor pole and is set immediately, and side is cut the earth, while anchor pole is set, to reinforce the globality between pile body and soil layer；Another party
Face, anchor pole are cleaned out the attached soil of pile body, with cutting the earth before pile body is set to pre- on outer side wing edge plate in H profile steel stake in time
It stays the soil body in bolthole to remove clean, in the case where there is boulder subcase, further to remove completely, 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) high-pressure injection concrete topping: to enhance the harmony of entire structural protective system stress and reaching water proof effect,
Before hoisting prefabricated board wall, one of concrete topping is sprayed on excavating soil layer vertical plane using high-pressure spray gun, while excavating
The thickness of gunite concrete surface layer is depending on practical the case where excavating situation and the installation of prefabricated board wall later period on face；
(7) 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 is in place from top vertical lifting, lower part other
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 section；If foundation excavation Shen Du≤
It is prefabricated by all sections of prefabricated board wall from top lifting construction in the case where ensuring H profile steel stake earth-retaining bearing capacity when 6m
Board wall is excavated with soil layer, is sunk paragraph by paragraph in place by self weight and the heavy load set of upper end board wall lifting, the two sections of prefabricated boards in left and right
There are the rear pouring concrete section of 250-350mm between wall, after the adjacent two prefabricated board wall reinforcing bar in left and right that pours in section be reliably connected；
(8) 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 reinforcing rib at the connecting node between prefabricated board wall and H profile steel stake, reinforces
The binding of the protruding bar of muscle and prefabricated board wall is secured；
(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 concrete intensity are not less than C40, and a grade at least higher than prefabricated board wall concrete strength；
(10) joint treatment: after to all of above work construction, the tightness degree between prefabricated board wall and soil layer is carried out
It checks comprehensively, if find that prefabricated board wall and soil layer seam occur local untight, modulation cement mortar is potted, water
The intensity of cement mortar is not less than M15, and mortar slump controls between 100-150mm；
(11) step (4)-(10) construction is repeated；
(12) waist beam steel bar colligation, formwork erection, filling concrete: when the prefabricated board wall construction of two sections finishes, upper and lower two
One cast-in-situ steel reinforced concrete waist rail is set between the prefabricated board wall of section, and waist rail reinforcing bar and prefabricated board wall protruding bar have connection, waist rail
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 and diameter 20mm, stirrup,
Stirrup spacing is not more than 200mm, and in waist rail reinforcing bar process of binding, the prefabricated board wall protruding bar of two sections anchors into the length in waist rail
Degree is not less than 1.5LaE, and waist rail reinforcing bar is welded at H profile steel stake using welding method and H profile steel stake web；
(13) acceptance.
2. a kind of H profile steel anchor pole composite pile according to claim 1-prefabricated board wall base pit enclosure construction method,
Be characterized 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 must not be small
In 350mm, edge of a wing 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, with
Convenient for 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 H profile steel anchor pole composite pile according to claim 1-prefabricated board wall base pit enclosure construction method,
Be characterized in that: pile cutoff connection is using welded connecting in the step (3).
4. a kind of H profile steel anchor pole composite pile according to claim 1-prefabricated board wall base pit enclosure construction method,
It is characterized in that: being the construction convenient for anchor pole in the step (5), anchor pole replaces conventional anchor using steel strand wires, and bolt diameter is extremely
It is few 10mm smaller than the preformed hole on flange plate on the inside of H profile steel stake, or use in H profile steel stake at outer side wing edge plate relative position
The preformed hole for setting anchor bolt construction is stayed, setting for later period anchor pole is facilitated, the preformed hole on interior outer side wing edge plate is at least more straight than anchor pole
The big 10mm of diameter.
5. a kind of H profile steel anchor pole composite pile according to claim 1-prefabricated board wall base pit enclosure construction method,
Be characterized in that: reinforcing rib diameter is not less than 20mm, and no less than 2 in the step (8).
6. a kind of H profile steel anchor pole composite pile according to claim 1-prefabricated board wall base pit enclosure construction method,
Be characterized in that: in the step (12) after the adjacent two sections of prefabricated board walls in left and right at pouring concrete, waist rail stirrup needs to encrypt, encryption
Area is not less than 600mm, and encrypted area stirrup spacing is not more than 100mm.
7. a kind of H profile steel anchor pole composite pile according to claim 1-prefabricated board wall base pit enclosure construction method,
It is characterized in that: the method that waist rail reinforcing bar uses the preformed hole on H profile steel stake web at H profile steel stake in the step (12), if
It sets perforation reinforcing bar of the diameter not less than 16mm to be connected and fixed with prefabricated board wall protruding bar, the radical for reinforcing bar of perforating is according to practical work
Journey concrete condition is determined by calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104977.6A CN108222017B (en) | 2018-02-02 | 2018-02-02 | A kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104977.6A CN108222017B (en) | 2018-02-02 | 2018-02-02 | A kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method |
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| US4003207A (en) * | 1974-12-19 | 1977-01-18 | Ludwig Muller | Method of and device for anchoring a reinforcement beam to a sheet piling |
| KR20110129657A (en) * | 2010-05-26 | 2011-12-02 | 이득근 | Retaining wall using frame structure and method of making retaining wall using thereof |
| CN105274998A (en) * | 2015-11-19 | 2016-01-27 | 杭州江润科技有限公司 | Construction method of assembled pile-plate-anchor-beam combination type batholith support |
| CN105464128A (en) * | 2015-12-21 | 2016-04-06 | 上海嘉实（集团）有限公司 | Assembly-type protective construction method for slab-pile wall through pre-stressed anchor cables |
| 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 |
| CN107059882A (en) * | 2017-04-17 | 2017-08-18 | 燕山大学 | Arch anchor net and Anchor-Pile Retaining Structure structure |
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| US4003207A (en) * | 1974-12-19 | 1977-01-18 | Ludwig Muller | Method of and device for anchoring a reinforcement beam to a sheet piling |
| KR20110129657A (en) * | 2010-05-26 | 2011-12-02 | 이득근 | Retaining wall using frame structure and method of making retaining wall using thereof |
| CN105274998A (en) * | 2015-11-19 | 2016-01-27 | 杭州江润科技有限公司 | Construction method of assembled pile-plate-anchor-beam combination type batholith support |
| CN105464128A (en) * | 2015-12-21 | 2016-04-06 | 上海嘉实（集团）有限公司 | Assembly-type protective construction method for slab-pile wall through pre-stressed anchor cables |
| 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 |
| CN107059882A (en) * | 2017-04-17 | 2017-08-18 | 燕山大学 | Arch anchor net and Anchor-Pile Retaining Structure structure |
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