CN104563131B - Rectangular enclosure pile, and construction method using rectangular enclosure pile as main structure - Google Patents

Rectangular enclosure pile, and construction method using rectangular enclosure pile as main structure Download PDF

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Publication number
CN104563131B
CN104563131B CN201510019194.4A CN201510019194A CN104563131B CN 104563131 B CN104563131 B CN 104563131B CN 201510019194 A CN201510019194 A CN 201510019194A CN 104563131 B CN104563131 B CN 104563131B
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Prior art keywords
pile
stake
construction
prefabricated
rectangular
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CN104563131A (en
Inventor
王国富
路林海
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Jinan Rail Transit Group Co Ltd
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Jinan Rail Transit Group Co Ltd
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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/045Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E02D29/05Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12Consolidating by placing solidifying or pore-filling substances in the soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • E02D5/30Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00Geometrical or physical properties
    • E02D2200/16Shapes
    • E02D2200/1628Shapes rectangular
    • E02D2200/1635Shapes rectangular made from single element

Abstract

The invention discloses a rectangular enclosure pile, and a construction method using the rectangular enclosure pile as a main structure. The rectangular enclosure pile comprises a plurality of prefabricated rectangular piles which are arranged according to the set positions and equipped with grouting holes; a top pressing crown beam, a waist beam, and a partition wall which is built through coal has hollow bricks are fixed between adjacent piles; the horizontal supporting and reverse building combined method is utilized for constructing; the top pressing crown beam is horizontally fixed on the top part of the adjacent rectangular pile; the waist beam is horizontally fixed at a bracket of the adjacent rectangular frame; the partition wall is built in a space formed by the adjacent rectangular pile and the waist beam; when a foundation pit is excavated, a vertical support and a horizontal support of the enclosure structure are respectively used as a vertical part and a horizontal part of the main structure of a building, and therefore, the waste of temporary supporting structure can be avoided; meanwhile, the construction period is saved, and the sustainable development of the foundation pit work can be achieved.

Description

A kind of rectangle fender post and building enclosure also serve as the construction method of agent structure
Technical field
The present invention relates to a kind of rectangle fender post and building enclosure also serve as the construction method of agent structure, it is particularly suited for city The construction of the foundation pit enclosure of area's building, excavation and underground agent structure.
Background technology
At present, adopt cast in situs base pit engineering fender post, pile quality is difficult to ensure that more, broken pile and folder mud often occur Phenomenon and being not easily repaired;The concrete of cast in situs needs an intensity rising stage, leads to the duration to waste;And fender post mostly is Temporary support structures, reclaim difficult, are given up with rear, cause waste and soil pollution after the completion of excavation of foundation pit;Building main body Structure cannot unite two into one with building enclosure, and agent structure just starts to construct after the completion of excavation of foundation pit, causes great material Waste and duration loss, and the secondary loading in supporting removal for the building enclosure and secondary deformation surrounding enviroment can be caused into The impact of one step.
Content of the invention
The present invention be directed to the problems referred to above, it is proposed that new pile-type and construction method, make use of fly ash building block to do main body A part for abutment wall, turns waste into wealth;Adopt the components such as prefabricated pile, prefabricated Guan Liang and waist rail building enclosure more, realize batch production, product Industry, become more meticulous, improve construction quality and speed of application;In conjunction with reverse construction step, by the vertical supporting of building enclosure Also serve as vertical member and the horizontal member of constructure body structure with horizontal support, it is to avoid the waste of temporary support structures, with When shorten the duration.
The purpose of the present invention can be reached by following measure:
A kind of rectangle fender post, arranges and in advance prefabricated rectangular pile according to setting position including multiple, in adjacent stake Between stake, formation building enclosure is connected by support member, rectangular pile is building enclosure and the building underground space of foundation ditch A part for agent structure exterior wall, and the top in building enclosure and middle part be provided with and also serve as horizontal member in constructure body structure Horizontal support and vertical supporting with vertical member.
There is an injected hole in each described rectangle pile center, after pile is in place, carries out pile grouting strengthening stratum, improves The stability of fender post.
Each described rectangular pile includes multistage, and every section of stake end positioned at excavation of foundation pit above section is designed with bracket, For support wale;Below Foundation Pit bottom, the rectangular pile of part is not provided with bracket, because not excavating it is not necessary to carry out below the bottom of hole Support.
Described support member includes bear down on one Guan Liang, waist rail and partition wall, and described Guan Liang of bearing down on one is horizontally fixed on adjacent rectangle The top of stake, described waist rail is horizontally fixed at the bracket of adjacent rectangle stake, and described Guan Liang of bearing down on one, waist rail pass through to connect water Flat support and control foundation pit deformation, described partition wall is built by laying bricks or stones in the space formed in adjacent rectangle stake and with waist rail.
Described horizontal support one end is fixed on fender post top pressure apical cap beam or middle part waist rail, and the other end is fixed on foundation ditch On the relevant position of opposite side fender post, the centre position of horizontal support is connected in stand column pile, and stand column pile is as horizontal support Vertical supporting, is horizontally supported as the horizontal carrier member of building enclosure during excavation of foundation pit, provides horizontal force to control foundation pit walls Deformation, stand column pile is vertical supporting it is ensured that the stablizing of horizontal support;After foundation pit construction finishes, it is horizontally supported as beam and supports Plate shape becomes the horizontal member of the constructure body structure underground space, and it is empty that vertical supporting forms constructure body structure underground as post Between vertical member.
Described partition wall is built by laying bricks or stones for fly ash hollow block and is formed, and stays on one layer of fly ash hollow block of waist rail the top There is grout hole, by the space filling at described partition wall rear, so that there is higher globality in the later stage as a part for agent structure And stability.
First fender post and stand column pile construction location are positioned, decided whether using rig in institute according to strata condition State and set one at fender post position and be less than the circular hole of the prefabricated pile length of side as the smooth press-in drawing hole and ensureing prefabricated pile.Go along with sb. to guard him Set outside foundation ditch after the completion of pile driving construction a circle rotary churning pile or surely spray stake make foundation pit waterproof curtain, cooperation dewatering measure ensures base Dry operating environment when hole is excavated.After the completion of water-stop curtain, carry out excavation of foundation pit, expose stake top ground floor bracket, going along with sb. to guard him Stake top construction is beared down on one Guan Liang, and sets up horizontal support to control fender post to foundation ditch offset inboard.Opening further with foundation ditch Dig, spraying a layer concrete in foundation pit walls prevents the soil body from coming off, after exposing second layer bracket, second layer bracket is constructed Waist rail, sets up second layer horizontal support on waist rail, and builds fly ash small hollow blocks by laying bricks or stones between two fender posts above waist rail and do Partition wall, described fly ash small hollow blocks last layer of building by laying bricks or stones leaves grout hole, by the space after described building block after the completion of building by laying bricks or stones Grouting is enriched, and continues excavation pit, until excavation of foundation pit completes, one-piece casting base plate of foundation pit, and finally cast-in-place liner abutment wall, liner Abutment wall, against partition wall, forms the exterior wall of the constructure body structure underground space with rectangular pile, Guan Liang of bearing down on one, waist rail and partition wall.
Carry out the construction method of agent structure using described rectangle fender post,
Step 1. prefabricated rectangle stake and bear down on one Guan Liang and waist rail;
Step 2. is constructed as follows using prefabricated rectangular pile:
a)Prefabricated fender post is pressed in soil layer;By the injected hole of each rectangular pile to pile grouting;
B) construct outside foundation ditch rotary churning pile, form together effectively water-stop curtain;And coordinate dewatering measure to ensure that foundation ditch is opened Dry operating environment when digging;
C) excavation pit, is fixed support using prefabricating coping Guan Liang, first horizontal support to rectangular pile top;
d)Continue excavation pit at second layer bracket, using waist rail, partition wall and horizontal support to rectangular pile mid portion It is fixed support;
e)According to step(d)It is layered downward excavation pit, until design of foundation pit depth;
F) lay substrate bed course, make bottom plate, assembling reinforcement, pour sole plate;
G) install liner sidewall template, from below to up cast-in-place liner abutment wall, bottom is connected with sole plate, cast-in-place abutment wall Against partition wall, act primarily as the effect of waterproof and flat outer surface.
h)Other internal composition components of construction building owner's body structure underground space, form foundation pit system, supporter System also serves as the underground space body of constructure body structure, and construction finishes.
The process of the prefabricated rectangle stake of step 1 is as follows:
Make the template of rectangular pile, make bracket template, banding steel cage at stake end, reserved with mould in the centre of template Injected hole, placing concrete, reach form removal after design strength.
The prefabricating coping Guan Liang of step 1, waist rail process as follows:
Make the template of bear down on one Guan Liang, waist rail, banding steel cage, placing concrete, reach form removal after design strength.
Described step 2(a)Specific implementation step as follows:
1) the stake position of fender post and vertical supporting stand column pile is positioned according to design requirement unwrapping wire;
2) regard strata condition, if piling is difficult, available rig sets a circular bore as drawing at Zhuan Wei center Hole is it is ensured that prefabricated pile is smoothly pressed into, and can improve perpendicularity, if piling is easier to, can directly carry out next step;
3) utilize pile press machine that prefabricated rectangle stake segmentation is pressed in soil layer, vertical supporting stand column pile is also pressed into soil simultaneously In layer;
4) by rectangular pile formed go along with sb. to guard him pile driving construction after the completion of, by rectangular pile injected hole to pile grouting, reinforce ground Layer, increases the stability of stake;
Described step 2(d)Specific implementation step as follows:
1) continue excavation pit to next layer of bracket, spraying a layer concrete in foundation pit walls prevents the soil body from coming off, will be pre- Waist rail processed is fixed on goes along with sb. to guard him between pile bracket;
2)Horizontal support is fixed on waist rail, horizontal support adopts cast-in-place concrete structure;
3) build flyash hollow block by laying bricks or stones in the space that waist rail and prefabricated pile are formed and do partition wall, and reserve filling in the top Slurry hole, closely knit space of being in the milk;
4) continue to excavate next layer of earthwork, repeat step 1) ~ 3).
Described fender post includes multiple rectangular cross-sections and the reinforced concrete rectangular stake with bracket prefabricated in advance.
Beneficial effects of the present invention are as follows:
By using prefabricated components so that speed of application and construction precision are improved, and the quality of prefabricated components Preferably so that construction quality is of a relatively high, save the absolute duration of base pit engineering.
Prefabricated pile can be made to be easier to bury by performing " drawing hole ", and be avoided that glance off it is ensured that pile vertical Degree, the more conducively later stage bears vertical load as constructure body structure;Can be by middle injected hole grouting and reinforcing stake bottom Portion's supporting course, improves the stability of stake and the bearing capacity of base stratum.
By the stratum at the injected hole grouting and reinforcing stake bottom in the middle of rectangular pile, can improve near stability and the stake of stake The bearing capacity on stratum.
Foundation ditch soil pressure is born by rectangle prefabricated pile, horizontal support provides horizontal force to control foundation pit deformation, vertical supporting Ensure horizontal support stability, three organically combines the support system being collectively forming foundation ditch, using reverse construction, construction environment Good, save the duration.
Horizontal support during excavation of foundation pit is also served as by the horizontal member of constructure body structure, with conventional flat support phase Bigger than its support stiffness, can effectively control the horizontal distortion of foundation pit side-wall, be conducive to protecting periphery buildings or structures, fit Be combined in foundation ditch surrounding environment strict to deformation requirements in the case of use.
By the bracket on prefabricated pile, prefabricated pile is connected with prefabricating coping Guan Liang, waist rail, as building enclosure, foundation ditch After the completion of excavation, by bracket, fender post can be connected as the bearing column of agent structure with the wall of agent structure and beam, base again Hole support system ultimately forms the agent structure of the building underground space, and rectangle prefabricated pile, overlapping wall form building underground sky Between exterior wall, horizontal support and vertical supporting form the beam of the building underground space, post component, greatly save construction material, Avoid the dismounting work of the interim horizontal support of tradition and vertical supporting, a large amount of building wastes that will not produce due to dismounting.
Build partition wall by laying bricks or stones by fly ash hollow block to have accomplished to turn waste into wealth, can be by reserved grout hole slip casting after partition wall Reinforce and improve stability;Combined cast-in-situ liner abutment wall, realizes two wall unifications, is collectively forming the building underground space with fender post Exterior wall, improves the stability of skin.
Brief description
Fig. 1 is the top view of rectangular pile;
Fig. 2(a)For the left view of rectangular pile, Fig. 2(b)Front view for rectangular pile;
Fig. 3 bears down on one cross-sectional view at Guan Liang for building enclosure;
Fig. 4 is cross-sectional view at building enclosure partition wall;
Fig. 5 is cross-sectional view at building enclosure waist rail;
Fig. 6 is foundation pit side-wall(Skin)Elevation;
Fig. 7 is foundation ditch centerline sectional cutaway;
In figure, 1 is injected hole, and 2 is bracket, and 3 is rectangular pile, and 4 is water-stop curtain, and 5 is Guan Liang of bearing down on one, and 7 is partition wall, and 8 are Waist rail, 9 is horizontal support, and 10 is stand column pile, and 11 is sole plate, and 12 is liner abutment wall, and 13 is injecting cement paste.
In Fig. 6 and Fig. 7, sole plate does not excavate part for foundation ditch below 11.
Specific embodiment
Below in conjunction with accompanying drawing, the implementation of the present invention is elaborated:
A kind of rectangle fender post, arranges and rectangular pile 3 prefabricated in advance according to setting position including multiple, in adjacent stake It is connected by supporting member between stake;Rectangular pile is outside the building enclosure of foundation ditch and building underground space agent structure A part for wall, and the horizontal member of constructure body structure and vertical member also serve as the horizontal support of pattern foundation pit supporting structure and vertical Support.
Described support member includes bear down on one Guan Liang 5, waist rail 8 and partition wall 7, and described Guan Liang of bearing down on one is horizontally fixed on adjacent square The top of shape stake, described waist rail is horizontally fixed at the bracket 2 of adjacent rectangle stake, and described Guan Liang of bearing down on one, waist rail pass through even Connect horizontal support 9 and control foundation pit deformation, described partition wall is built by laying bricks or stones in the space formed in adjacent rectangle stake and with waist rail.
After pile is in place, pile grouting strengthening stratum is carried out by each rectangle pile center injected hole 1, stake end forms note Slurry 13, can improve bearing capacity and the formation stability of stake.
Each described rectangular pile includes multistage, and every section of stake end positioned at excavation of foundation pit part is designed with bracket 2, is used for Support wale;Below Foundation Pit bottom, the rectangular pile of part is not provided with bracket, because not excavating below the bottom of hole it is not necessary to carry out propping up Support.
Described partition wall 7 is built by laying bricks or stones above waist rail by fly ash hollow block, and on the fly ash hollow block of the top Leave grout hole, by the space filling at described partition wall rear, so that there is higher entirety in the later stage as a part for agent structure Property and stability.
Described horizontal support 9 one end is fixed on fender post top pressure apical cap beam 5 or middle part waist rail 8, and the other end is fixed on On the relevant position of foundation ditch opposite side fender post, during horizontal support middle setting stand column pile 10 is as vertical supporting, excavation of foundation pit It is horizontally supported as the horizontal carrier member of building enclosure, provide horizontal force to control foundation pit walls deformation, stand column pile is vertical supporting, Ensure stablizing of horizontal support;After foundation pit construction finishes, it is horizontally supported as beam and gripper shoe forms constructure body structure ground The horizontal member in lower space, vertical supporting forms the vertical member of the constructure body structure underground space as post.
First fender post and stand column pile construction location are positioned, decided whether using rig in institute according to strata condition State and set one at fender post position and be less than the circular hole of the prefabricated pile length of side as the smooth press-in drawing hole and ensureing prefabricated pile.Go along with sb. to guard him Set outside foundation ditch after the completion of pile driving construction a circle rotary churning pile or surely spray stake make foundation pit waterproof curtain 4, cooperation dewatering measure ensures Dry operating environment during excavation of foundation pit.After the completion of water-stop curtain, carry out excavation of foundation pit, expose stake top ground floor bracket 2, enclosing The construction of fender pile top is beared down on one Guan Liang 5, and sets up horizontal support 9 to control fender post to foundation ditch offset inboard.Enter one with foundation ditch Step is excavated, and spraying a layer concrete in foundation pit walls prevents the soil body from coming off, after exposing second layer bracket, on second layer bracket Construction waist rail 8, sets up second layer horizontal support on waist rail, and builds flyash hollow building above waist rail between two fender posts by laying bricks or stones Block does partition wall 7, and described fly ash small hollow blocks last layer of building by laying bricks or stones leaves grout hole, by after described building block after the completion of building by laying bricks or stones Space grouting is enriched, and continues excavation pit, until excavation of foundation pit completes, one-piece casting sole plate 11, and finally cast-in-place lining edges Wall 12, liner abutment wall, against partition wall, forms the constructure body structure underground space with rectangular pile, Guan Liang of bearing down on one, waist rail and partition wall Exterior wall.
Specific construction method is as follows:
Step 1. prefabricated rectangle stake, Guan Liang of bearing down on one and waist rail;
Step 2. is constructed as follows using prefabricated rectangular pile:
a)Prefabricated pile is pressed in soil layer;By the injected hole 1 of each rectangular pile to pile grouting, fender post bottom is formed Injecting cement paste 13;
B) construct outside foundation ditch rotary churning pile, form together effectively water-stop curtain 4;And coordinate dewatering measure to ensure foundation ditch Dry operating environment during excavation;
C) excavation pit, is fixed support in rectangle stake top using prefabricating coping Guan Liang 5, first horizontal support 9;
d)Continue excavation pit at second layer bracket 2, using waist rail 8, partition wall 7 and horizontal support 9 to rectangular pile in the middle of Part is fixed support;
e)According to step(d)It is layered downward excavation pit, until design of foundation pit depth;
F) lay substrate bed course, make bottom plate, assembling reinforcement, pour sole plate 11;
G) install liner sidewall template, from below to up cast-in-place liner abutment wall 12, bottom is connected with sole plate, cast-in-place side Wall, with against partition wall 7, acts primarily as the effect of waterproof and flat outer surface.
h)Other internal composition components of construction building owner's body structure underground space, form foundation pit system, supporter System also serves as the underground space body of constructure body structure, and construction finishes.
The process of the prefabricated rectangle stake of step 1 is as follows:
Make the template of rectangular pile, make bracket template, banding steel cage at stake end, reserved with mould in the centre of template Injected hole, placing concrete, reach form removal after design strength.
The prefabricating coping Guan Liang of step 1, waist rail process as follows:
Make the template of bear down on one Guan Liang, waist rail, banding steel cage, placing concrete, reach form removal after design strength.
Described step 2(a)Specific implementation step as follows:
1) according to the stake position of design requirement unwrapping wire locating rectangle stake 3 and vertical supporting stand column pile 10;
2) regard strata condition, if piling is difficult, available rig sets a circular bore as drawing at Zhuan Wei center Hole is it is ensured that prefabricated pile is smoothly pressed into, and can improve perpendicularity, if piling is easier to, can directly carry out next step;
3) utilize pile press machine that prefabricated rectangle stake 3 segmentation is pressed in soil layer, vertical supporting stand column pile 10 is also pressed into simultaneously In soil layer;
4) by rectangular pile formed go along with sb. to guard him pile driving construction after the completion of, by rectangular pile injected hole 1 to pile grouting, increase stake Stability;
Described step 2(d)Specific implementation step as follows:
1) continue excavation pit to next layer of bracket 2, spraying a layer concrete in foundation pit walls prevents the soil body from coming off, will Prefabricated waist rail 8 is fixed on goes along with sb. to guard him between pile bracket;
2)Horizontal support 9 is fixed on waist rail 8, horizontal support adopts cast-in-place concrete structure;
3) build flyash hollow block by laying bricks or stones in the space that waist rail and prefabricated pile are formed and do partition wall 7, and reserve filling in the top Slurry hole, closely knit space of being in the milk;
4) continue to excavate next layer of earthwork, repeat step 1) ~ 3).
Described fender post includes multiple rectangular cross-sections and the reinforced concrete rectangular stake with bracket prefabricated in advance.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not model is protected to the present invention The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art are not Need to pay the various modifications that creative work can make or deformation still within protection scope of the present invention.

Claims (5)

1. a kind of rectangle fender post also serves as the construction method of agent structure, wherein rectangle fender post, including multiple according to setting position Put arrangement and in advance prefabricated rectangular pile, between adjacent stake and stake, formation building enclosure, rectangular pile are connected by support member Be the building enclosure of foundation ditch and a part for building underground space agent structure exterior wall, and the top in building enclosure and Middle part is provided with and also serves as the horizontal support of horizontal member and vertical member and vertical supporting in constructure body structure;Each rectangular pile There is an injected hole at center, after pile is in place, carries out pile grouting strengthening stratum;Each rectangular pile includes multistage, positioned at foundation ditch Every section of stake end excavating above section be designed with bracket for support wale it is characterised in that:
Step 1. prefabricated rectangle stake and bear down on one Guan Liang and waist rail;
Step 2. is constructed as follows using prefabricated rectangular pile:
a)Prefabricated rectangle stake is pressed in soil layer;By the injected hole of each rectangular pile to pile grouting;
B) carry out water-proofing treatment outside foundation ditch;
C) excavation pit, is fixed support using prefabricating coping Guan Liang and horizontal support to rectangular pile top;
d)Continue excavation pit at second layer bracket, using waist rail, partition wall and horizontal support, rectangular pile mid portion is carried out Fixing support;
Horizontal support one end is fixed on fender post top pressure apical cap beam or middle part waist rail, and the other end is fixed on foundation ditch opposite side fender post Relevant position on;
e)According to step(d)It is layered downward excavation pit, until design of foundation pit depth;
F) lay substrate bed course, make bottom plate, assembling reinforcement, pour sole plate;
G) install liner sidewall template, from below to up cast-in-place liner abutment wall, bottom is connected with sole plate, cast-in-place abutment wall against Partition wall, acts primarily as the effect of waterproof and flat outer surface;
h)Other internal composition components of construction building owner's body structure underground space, formation foundation pit system, support system are simultaneous Do the underground space body of constructure body structure, construction finishes.
2. construction method as claimed in claim 1 it is characterised in that:The process of the prefabricated rectangle stake of step 1 is as follows:
Make the template of rectangular pile, make bracket template, banding steel cage at stake end, reserve slip casting in the centre of template with mould Hole, placing concrete, reach form removal after design strength;
The prefabricating coping Guan Liang of step 1, waist rail process as follows:
Make the template of bear down on one Guan Liang, waist rail, banding steel cage, placing concrete, reach form removal after design strength.
3. construction method as claimed in claim 1 it is characterised in that:
Described step 2(a)Specific implementation step as follows:
1) according to the stake position of design requirement unwrapping wire locating rectangle stake and vertical supporting stand column pile;
2) regard strata condition, if piling is difficult, sets a circular bore as drawing hole by the use of rig at Zhuan Wei center, protect Card prefabricated pile is smoothly pressed into, and can improve perpendicularity, if piling is easier to, directly carries out next step;
3) utilize pile press machine that prefabricated rectangle stake segmentation is pressed in soil layer, vertical supporting stand column pile be also pressed in soil layer simultaneously, Ensure that the centre position of horizontal support is connected in stand column pile, stand column pile is as the vertical supporting of horizontal support, excavation of foundation pit phase Between be horizontally supported as provide horizontal force control foundation pit walls deformation building enclosure horizontal carrier member, stand column pile be ensure water The vertical supporting of flat supporting & stablizing;
4) after the completion of the building enclosure construction being formed by rectangular pile, by rectangular pile injected hole to pile grouting, strengthening stratum, Increase the stability of stake.
4. construction method as claimed in claim 1 it is characterised in that:
Described step 2( c)Specific implementation step as follows:
1) excavation pit, until exposing the rectangular pile stake top part positioned at top;
2) fix prefabricating coping Guan Liang in rectangle stake top;
3)Bearing down on one, construction level in Guan Liang supports, and horizontal support is combined using bracing members and reinforced beam support phase and makes With.
5. construction method as claimed in claim 1 it is characterised in that:
Described step 2(d)Specific implementation step as follows:
1) continue excavation pit to next layer of bracket, spraying a layer concrete in foundation pit walls prevents the soil body from coming off, by prefabricated waist Beam is fixed between rectangle pile bracket;
2)Horizontal support is fixed on waist rail, horizontal support adopts cast-in-place concrete structure;
3) build flyash hollow block by laying bricks or stones in the space that waist rail and prefabricated pile are formed and do partition wall, and reserve grout hole in the top, It is in the milk closely knit space;
4) continue to excavate next layer of earthwork, repeat step 1) ~ 3).
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CN201972155U (en) * 2011-01-28 2011-09-14 东南大学 Topdown-construction-method foundation pit supporting structure of steel plate pile
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CN204435390U (en) * 2015-01-14 2015-07-01 济南轨道交通集团有限公司 A kind of rectangle fender pile

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