CN111827280B - Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof - Google Patents

Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof Download PDF

Info

Publication number
CN111827280B
CN111827280B CN202010730468.1A CN202010730468A CN111827280B CN 111827280 B CN111827280 B CN 111827280B CN 202010730468 A CN202010730468 A CN 202010730468A CN 111827280 B CN111827280 B CN 111827280B
Authority
CN
China
Prior art keywords
template
arc
shaped
retaining
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010730468.1A
Other languages
Chinese (zh)
Other versions
CN111827280A (en
Inventor
任亮
李明华
韩雯静
喻贤明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
East China Jiaotong University
Original Assignee
East China Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by East China Jiaotong University filed Critical East China Jiaotong University
Priority to CN202010730468.1A priority Critical patent/CN111827280B/en
Publication of CN111827280A publication Critical patent/CN111827280A/en
Application granted granted Critical
Publication of CN111827280B publication Critical patent/CN111827280B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • E02D5/66Mould-pipes or other moulds
    • E02D5/68Mould-pipes or other moulds for making bulkheads or elements thereof
    • 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
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/385Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes

Abstract

A wall protecting device for an ex-situ pouring and jacking hole digging pile and a construction method thereof are disclosed. The template is a cylindrical structure with an outer bottom edge formed by splicing a plurality of arc steel templates with bottoms; the bottom-equipped arc-shaped steel template (10) consists of an arc-shaped side template (1) and a bottom template (2) which are connected by adopting a U-shaped card; the bottom template is a sector; one end of the arc-shaped side template is vertically welded on the end surface of the small arc of the sector bottom template; a cylinder is formed by a plurality of arc-shaped side templates, and an annular surface is formed by a plurality of bottom templates; the annular surface is closely connected with the lower end of the arc-shaped side template, and the annular surface of the bottom template is used for placing a reinforcement cage. The construction method adopts a method of heterotopic pouring, jacking and in-place, the invention adopts a cylindrical template structure with outer bottom edges formed by splicing arc-shaped steel templates with bottoms, and simultaneously adopts a retaining wall construction method of heterotopic pouring and jacking and in-place, thereby avoiding slab staggering, enabling the old and new retaining walls to be better connected and ensuring the quality of the retaining wall.

Description

Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof
Technical Field
The invention relates to a wall protecting device for an ex-situ pouring jacking in-place bored pile and a construction method thereof, and belongs to the technical field of civil bored piles.
Background
The hole digging pile is characterized in that firstly, manual soil digging is carried out to form a pile hole, the wall of the pile hole is lined to ensure construction safety while downward tunneling is carried out, and concrete is poured after the bottom of the pile hole is cleaned. The manual hole digging pile is generally thicker in diameter, the thinnest is more than 800 mm, and the manual hole digging pile is generally applied to the aspects of bridges, subways, civil buildings, retaining wall foundations and the like. The pile is provided with bearing platforms, and the bearing platform beams are used for drawing and connecting the piles, so that the stress of each pile is uniformly distributed to support the whole building.
The manual hole digging pile is convenient to construct, high in speed and free of large-scale mechanical equipment, the hole digging pile is stronger in shock resistance than a timber pile and a concrete driven pile, and the manufacturing cost is saved compared with that of a punching cone, a punching drill, a drilling hole of a rotary drill and a well sinking foundation.
However, the underground operation condition of the hole digging pile is poor, the environment is severe, the labor intensity is high, and particularly the support of the hole wall is difficult.
The retaining wall can be formed in various modes, such as wood boards, brick masonry, steel ring beams, sprayed concrete, sleeve type metal shells, open caisson and the like. However, because the manual hole digging pile belongs to manual operation, the progress is slow, the equipment is simple, the mechanization degree is low, the field application is most or the concrete cast-in-place is adopted, the mode has strong flexibility, the mode is matched with the field operation condition, the integrity and the seepage-proofing performance of the protecting wall are better, the structural form is flexible and changeable, and the expanding bottom can be made.
The construction of the concrete retaining wall is the key of the hole forming of the manual dug pile, and the traditional cast-in-place construction method has the following problems: (1) the existence of steps: because the concrete retaining wall is constructed layer by layer from top to bottom along with the excavation sequence of the bored pile, when the next layer of retaining wall is constructed, the front layer of retaining wall is already finished, after the formwork of the layer is erected, the concrete cannot be poured, the formwork can only be inclined towards the inside of the hole, so that the concrete can be poured and vibrated, and after the concrete is solidified and the formwork is removed, a step is formed (as shown in fig. 7). (2) And (3) limiting application: because the retaining wall is stepped, the concrete can be covered after the pile foundation of the hole digging pile is poured, and if the pile foundation of the hole digging pile is of a vertical shaft structure or the like, the influence of the stepped retaining wall on the appearance is large, so that the application range of the hole digging pile is limited. (3) The cost is increased: because the step type of the retaining wall needs to increase the thickness of the retaining wall, the outer size of the excavated hole needs to be increased, and the engineering cost is naturally increased. (4) Increasing the risk: because the external size of the dug pile is increased, the number of projects is increased, the progress is slowed down, and the construction risk is naturally increased.
Disclosure of Invention
The invention aims to provide a construction method for casting and lifting in-place dug pile retaining walls in different positions, which aims to solve the problems that the concrete surface of the retaining wall is smooth and has no staggered platform, the assembly of retaining wall templates is convenient and can be used repeatedly, the construction method is simple and easy to implement, and the construction time is not limited.
The technical scheme includes that the wall protecting device for the ex-situ pouring and jacking in-place dug pile comprises a jack and a template.
The template is a cylindrical structure with an outer bottom edge formed by splicing a plurality of arc steel templates with bottoms; the bottom-equipped arc-shaped steel template consists of an arc-shaped side template and a bottom template, the bottom template is a sector, and the radius of a small arc of the bottom template of the sector is the same as the arc radius of the cross section of the arc-shaped template; one end of the arc-shaped side template is vertically welded on the end surface of the small arc of the sector bottom template; a cylinder is formed by a plurality of arc-shaped side templates, and an annular surface is formed by a plurality of bottom templates; the annular surface is closely connected with the lower end of the arc-shaped side template, and the annular surface of the bottom template is mainly used as a bottom template for ex-situ casting of retaining wall concrete (containing a reinforcement cage) and is also a main action surface for completing the jacking process.
The arc-shaped side templates can be connected with each other by adopting a U-shaped card; the bottom die plate and the bottom die plate can be connected by a U-shaped card.
The plurality of arc-shaped steel templates with bottoms can be preferably selected to be 2-4 arc-shaped steel templates with bottoms according to the shape and size of the bored pile.
The width of the bottom template is the thickness of the protective wall, and the width needs to be determined by calculation according to field conditions, and is generally 8-15 cm.
The height of the arc-shaped side template is determined according to geological conditions and is generally 50-80 cm; the upper end thereof is slightly bent to the outer (in-hole direction) side so as not to collide with the upper cast concrete retaining wall.
The construction method for casting and jacking in-place hole digging pile retaining walls in different positions comprises the following steps:
(1) pouring concrete at the hole opening to form a first layer of retaining wall support, and continuously digging a hole downwards after the pouring of the concrete retaining wall at the hole opening of the hole digging pile is finished, wherein the depth is determined according to geological conditions and is usually 0.8-1.2 m;
(2) installing jacks at joints of the steel modules, wherein the number of the jacks is determined according to the number of the modules;
(3) a circular steel reinforcement cage with a protective wall is arranged,
(4) a bottom arc-shaped steel template is installed, and the bottom template is installed between the jack and the upper part and the lower part of the reinforcement cage; the arc-shaped side templates are uniformly installed and connected with each other by adopting 2U-shaped clamps; the bottom template is installed and connected with the bottom template through 1U-shaped clamp;
(5) pouring and vibrating the concrete of the protecting wall;
(6) after the retaining wall concrete is dried, a jack pushes the finished retaining wall; when the templates are assembled in an ectopic mode, a gap of 0.2-0.3 m is reserved between the upper portion of the concrete retaining wall of the layer and the concrete retaining wall of the upper layer, the concrete is poured and vibrated, and the retaining wall without a wrong platform is formed after jacking;
(7) curing the newly poured concrete;
(8) digging a hole downwards near the middle part of the digging pile;
(9) after the newly poured breast wall concrete is initially set, the jack is removed, and the mold is loosened and removed;
(10) and (5) continuously digging holes downwards, and repeating the steps (1) to (9) until the hole digging pile is finished.
The invention has the advantages that the invention adopts a cylindrical template structure with an outer bottom edge formed by splicing a plurality of arc-shaped steel templates with bottoms, and simultaneously adopts a retaining wall construction method of ectopic pouring and jacking in place, thereby avoiding slab staggering, enabling the old and new retaining walls to be better connected and ensuring the quality of the retaining walls. The invention solves the difficult problem of the construction of the retaining wall of the dug pile for a long time, greatly improves the efficiency of the retaining wall, enhances the beautiful effect and reduces the construction cost.
With the increasing construction quantity of the on-site hole digging pile foundations, the problem of the hole digging pile retaining wall is solved, and great economic benefits are created for national basic construction.
Drawings
FIG. 1 is a schematic structural view of a dug pile retaining wall device according to the present invention;
FIG. 2 is a construction flow chart of a dado of an ex-situ pouring jacking in-place hole digging pile;
FIG. 3 is a top view of the dug pile retaining wall assembly;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a construction drawing of wall protection ectopic pouring;
FIG. 6 is a schematic illustration of the jacking of the retaining wall into position;
FIG. 7 is a schematic view of a conventional step formed on a retaining wall step of a bored pile;
in the figure, 1 is an arc-shaped side template; 2 is a bottom template; 3 is a U-shaped card; and 10 is a bottom arc steel template.
Detailed Description
The specific embodiment of the present invention is as follows.
An ex-situ pouring and jacking in-place hole digging pile retaining wall device of the embodiment is shown in figures 2-4.
This embodiment a dystopy is pour jacking and is taken one's place hole digging pile dado device, includes steel reinforcement cage and template.
The template of the embodiment is a cylindrical structure with an outer bottom edge formed by splicing 3 arc-shaped steel templates 10 with bottoms. The bottom-equipped arc-shaped steel template 10 consists of an arc-shaped side template 1 and a bottom template 2, the bottom template 2 is a 120-degree sector, and the radius of a small arc of the sector-shaped bottom template is the same as the arc radius of the cross section of the arc-shaped template; one end of the arc-shaped side template 1 is vertically welded on the end surface of the small arc of the sector bottom template; a cylinder is formed from 3 curved sideforms 1 as shown in figure 3. 3 bottom templates 2 with 120-degree sector surfaces form an annular surface; the annular surface is closely connected with the lower end of the arc-shaped side template, and the annular surface of the bottom template is used for placing a reinforcement cage.
As can be seen from fig. 4, the cross-sectional view in the vertical direction of the steel form with bottom arc is "L" shape, the vertical part is the arc-shaped side form, and the lower horizontal part is the bottom form.
As shown in fig. 1, the construction method for the ex-situ casting and jacking in-place dug pile retaining wall of the embodiment is as follows:
(1) pouring concrete at the hole opening to form a first layer of retaining wall support, and continuously digging a hole downwards with the depth of 1.2m after the pouring of the concrete retaining wall at the hole opening of the hole digging pile is finished;
(2) installing jacks at joints of the steel modules, and installing 3 jacks in total;
(3) placing a retaining wall circular ring-shaped reinforcement cage on the jack;
(4) a bottom arc-shaped steel template 10 is installed, and a bottom template 2 is installed between a jack and the upper portion and the lower portion of a reinforcement cage; the arc-shaped side templates are uniformly installed and connected with each other by 2U-shaped clamps 3; the bottom template is connected with the bottom template by adopting 1U-shaped card 3;
(5) pouring and vibrating the concrete of the protecting wall;
(6) after the retaining wall concrete is dried, a jack pushes the finished retaining wall; when the templates are assembled in an ectopic way, a gap of 0.3m is left between the upper part of the concrete of the retaining wall of the layer and the concrete retaining wall of the upper layer for pouring and vibrating the concrete, and the retaining wall without a wrong platform is formed after jacking;
(7) curing the newly poured concrete;
(8) digging a hole downwards near the middle part of the digging pile;
(9) after the newly poured breast wall concrete is initially set, the jack is removed, and the mold is loosened and removed;
(10) and (5) continuously digging holes downwards, and repeating the steps (1) to (9) until the hole digging pile is finished.
Fig. 5 shows the construction drawing of the wall protection ectopic pouring.
In fig. 5, the upper part of a pile hole is a first layer of retaining wall support, the bottommost part of the hole is provided with 3 jacks, and the jacks are placed along the circumferential direction, wherein the number of the jacks is 120 degrees; the jack is provided with a bottom arc steel template 10, and 3 bottom arc steel templates 10 are spliced along the circumference of the pile hole to form a cylinder with an outer bottom plate and are installed by adopting a U-shaped clamp. A steel reinforcement cage is arranged on the annular surface formed by the bottom template. And a space of a concrete pouring opening is reserved between the upper end of the arc-shaped steel template with the bottom and the first-layer retaining wall support, so that concrete is poured conveniently.
Fig. 6 shows the wall in the jacking position.
In fig. 6, after the retaining wall concrete is dried, the jack pushes the finished retaining wall; when the templates are assembled in an ectopic mode, a gap of 0.3m is reserved between the upper portion of the concrete retaining wall of the layer and the concrete retaining wall of the upper layer, the concrete is poured and vibrated, and the retaining wall without a wrong platform is formed after jacking.

Claims (5)

1. A construction method for casting and lifting in-place hole digging pile dado in different positions comprises a jack and a template, and is characterized in that the template is a cylindrical structure with an outer bottom edge formed by splicing a plurality of arc-shaped steel templates with bottoms; the bottom-equipped arc-shaped steel template consists of an arc-shaped side template and a bottom template, the bottom template is a sector, and the radius of a small arc of the bottom template of the sector is the same as the arc radius of the cross section of the arc-shaped template; one end of the arc-shaped side template is vertically welded on the end surface of the small arc of the sector bottom template; a cylinder is formed by a plurality of arc templates, and an annular surface is formed by a plurality of bottom templates; the annular surface is closely connected with the lower end of the arc-shaped side template, and the annular surface of the bottom template is used for placing a reinforcement cage;
the construction method for the ex-situ pouring and jacking in-place dug pile retaining wall comprises the following steps:
(1) pouring concrete at the hole opening to form a first layer of retaining wall support, and continuously digging a hole downwards after the pouring of the concrete retaining wall at the hole opening of the hole digging pile is finished, wherein the depth is determined according to geological conditions and ranges from 0.8 m to 1.2 m;
(2) installing jacks at joints of the steel modules, wherein the number of the jacks is determined according to the number of the modules;
(3) a circular steel reinforcement cage with a protective wall is arranged,
(4) a bottom arc-shaped steel template is installed, and the bottom template is installed between the jack and the upper part and the lower part of the reinforcement cage; the arc-shaped side templates are uniformly installed and connected with each other by adopting 2U-shaped clamps; the bottom template is installed and connected with the bottom template through 1U-shaped clamp;
(5) pouring and vibrating the concrete of the protecting wall;
(6) after the retaining wall concrete is poured, a jack pushes the finished retaining wall; when the templates are assembled in an ectopic mode, a gap of 0.2-0.3 m is reserved between the upper portion of the concrete retaining wall of the layer and the concrete retaining wall of the upper layer, the concrete is poured and vibrated, and the retaining wall without a wrong platform is formed after jacking;
(7) curing the newly poured concrete;
(8) digging a hole downwards near the middle part of the digging pile;
(9) after the newly poured breast wall concrete is initially set, the jack is removed, and the mold is loosened and removed;
(10) and (5) continuously digging holes downwards, and repeating the steps (1) to (9) until the hole digging pile is finished.
2. The construction method for the ex-situ casting and jacking in-place dug pile retaining wall according to claim 1, wherein the arc-shaped side templates are connected with each other through U-shaped connectors; the bottom die plate is connected with the bottom die plate through a U-shaped card.
3. The construction method for the ex-situ casting and jacking in-place dug pile dado according to claim 1, wherein the plurality of bottom arc-shaped steel templates, preferably 2-4 bottom arc-shaped steel templates.
4. The construction method for the ex-situ casting and jacking in-situ bored pile retaining wall according to claim 1, wherein the width of the bottom formwork is the retaining wall thickness and is 8-15 cm.
5. The construction method for the ex-situ casting jacking in-place dug pile retaining wall according to claim 1, wherein the height range of the arc-shaped side formwork is 50-80 cm; the upper end of which is slightly bent outwards.
CN202010730468.1A 2020-07-27 2020-07-27 Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof Active CN111827280B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010730468.1A CN111827280B (en) 2020-07-27 2020-07-27 Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010730468.1A CN111827280B (en) 2020-07-27 2020-07-27 Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof

Publications (2)

Publication Number Publication Date
CN111827280A CN111827280A (en) 2020-10-27
CN111827280B true CN111827280B (en) 2022-04-19

Family

ID=72925553

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010730468.1A Active CN111827280B (en) 2020-07-27 2020-07-27 Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof

Country Status (1)

Country Link
CN (1) CN111827280B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112709217B (en) * 2020-12-24 2022-05-17 中铁大桥局集团第六工程有限公司 Formwork assembly of reverse construction method retaining wall and retaining wall construction method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02112521A (en) * 1988-10-20 1990-04-25 Nippon Steel Corp Construction of cylindrical structure and steel segment therefor
CN204385733U (en) * 2014-12-16 2015-06-10 贵州建工集团第五建筑工程有限责任公司 Man-made digging pile mould-pipe template
CN105002890A (en) * 2015-07-15 2015-10-28 杭州江润科技有限公司 Abyssal region cast-in-situ bored pile nondestructive assembly and disassembly double-layer steel casing group structure and construction method
CN109695243A (en) * 2019-01-25 2019-04-30 中国建筑第四工程局有限公司 One kind being used for silt soil strata hole pile wall device and construction method
CN110258550A (en) * 2019-06-25 2019-09-20 湘潭大学 A kind of concrete prefabricated retaining wall of artificial digging pile and construction method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106930277B (en) * 2017-04-14 2019-02-15 华煜建设集团有限公司 A kind of construction of manual-excavation cast-in-place pile method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02112521A (en) * 1988-10-20 1990-04-25 Nippon Steel Corp Construction of cylindrical structure and steel segment therefor
CN204385733U (en) * 2014-12-16 2015-06-10 贵州建工集团第五建筑工程有限责任公司 Man-made digging pile mould-pipe template
CN105002890A (en) * 2015-07-15 2015-10-28 杭州江润科技有限公司 Abyssal region cast-in-situ bored pile nondestructive assembly and disassembly double-layer steel casing group structure and construction method
CN109695243A (en) * 2019-01-25 2019-04-30 中国建筑第四工程局有限公司 One kind being used for silt soil strata hole pile wall device and construction method
CN110258550A (en) * 2019-06-25 2019-09-20 湘潭大学 A kind of concrete prefabricated retaining wall of artificial digging pile and construction method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
论浙江某商住楼工程人工挖孔桩基础施工;刘竞祥;《四川建材》;20091018(第05期);全文 *

Also Published As

Publication number Publication date
CN111827280A (en) 2020-10-27

Similar Documents

Publication Publication Date Title
KR102009077B1 (en) Earth retaining wall construction method using castinplace concrete pile of impermeable peristyle type
CN109403354B (en) Construction method for deep foundation pit support of inverted retaining wall of cyclone well
US6948885B2 (en) Method for constructing foundation
CN111827280B (en) Ex-situ pouring, jacking and in-place hole digging pile retaining wall device and construction method thereof
CN112726627A (en) Cast-in-situ bored pile structure in area with intense karst and construction method
CN102220764B (en) Construction method of deep foundation pit bracing system
CN214169107U (en) Cast-in-situ bored pile structure in area with intense karst
KR102021496B1 (en) Retaining wall construction method and retaining wall structure by the method
CN109653193B (en) Reverse construction method for underground continuous wall
CN109989415B (en) Construction method of fabricated foundation
CN112012197A (en) Manual hole digging pile and construction method thereof
CN110886311A (en) Large-volume assembly type ground tire mold
JP4196273B2 (en) How to form a retaining wall at the bottom of an existing building
CN108222054A (en) Tower-crane foundation structure and its construction method
CN107476293A (en) A kind of quick spreading structure of soft soil foundation bored concrete pile configures and its spreading method
CN111778962B (en) Construction method of partially-empty underground continuous wall
CN214423184U (en) Be applied to hasp steel-pipe pile cofferdam under water level variation condition
CN212896374U (en) Foundation pit support structure located in underground space of existing building
KR960016755B1 (en) Working method and working apparatus of underground structure
CN214245694U (en) Pile forming system for large-diameter cast-in-situ bored pile in karst area
CN212336065U (en) Guiding and sinking system suitable for underground shaft group construction
CN111021413B (en) Reverse construction method based on assembly type concept
CN211547785U (en) Large-volume assembly type ground tire mold
CN109137944B (en) Construction method of water-stop wall in deep-water bottom-sealing-free steel cofferdam
CN205591211U (en) Cavity cast member underground tunnelling construction assembly and diaphragm wall

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant