CN106638732B - Underground foundation pile pipe curtain support construction and construction method - Google Patents

Underground foundation pile pipe curtain support construction and construction method Download PDF

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Publication number
CN106638732B
CN106638732B CN201710019635.XA CN201710019635A CN106638732B CN 106638732 B CN106638732 B CN 106638732B CN 201710019635 A CN201710019635 A CN 201710019635A CN 106638732 B CN106638732 B CN 106638732B
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CN
China
Prior art keywords
foundation pile
underground
pipe
support construction
curtain
Prior art date
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CN201710019635.XA
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Chinese (zh)
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CN106638732A (en
Inventor
肖明清
邓朝辉
薛光桥
谢俊
胡大伟
Original Assignee
中铁第四勘察设计院集团有限公司
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Priority to CN201710019635.XA priority Critical patent/CN106638732B/en
Publication of CN106638732A publication Critical patent/CN106638732A/en
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Publication of CN106638732B publication Critical patent/CN106638732B/en

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00Repair of damaged foundations or foundation structures
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/06Separating, lifting, removing of buildings; Making a new sub-structure

Abstract

It include foundation pile and the horizontal tube curtain being arranged in around the foundation pile the invention discloses a kind of underground foundation pile pipe curtain support construction, the horizontal tube curtain includes branch trustship, rest pipe connections, implantation reinforcement connector and filler;The branch trustship is horizontally set on the foundation pile two sides, and is connected by the rest pipe connections to form a perforation cavity;The implantation is reinforced connector and is laterally disposed in the cavity, and passes through the location hole on the foundation pile;The filler filling is in the cavity.The invention also discloses a kind of underground foundation pile pipe curtain support construction construction methods.Underground foundation pile pipe curtain support construction and construction method of the invention branch trustship, rest pipe connections, is reinforced in implantation and filler forms horizontal tube curtain by being arranged around foundation pile by connector, realize the support and load transfer of foundation pile, this mode security risk is small, there is significant advantage also without limitation to the span of newly-built underground structure when underpining simultaneously for foundation pile.

Description

Underground foundation pile pipe curtain support construction and construction method
Technical field
The present invention relates to underground construction technical fields, in particular to a kind of underground foundation pile pipe curtain support construction and construction Method.
Background technique
Currently, with a large amount of expansion of underground engineering construction, it is no matter at home or external, below existing engineering structure again The case for implementing underground engineering is more and more.For the existing engineering using pile foundation, need to carry out pile foundation underpinning to mention Example for creating underground engineering channel is consequently increased.
The key problem of pile foundation underpinning is the conversion of existing pile foundation load, i.e., using actively or passively underpinning technique will be existing Load on pile foundation is transformed on newly-built structure.In general, present load conversion is by newly building base in the two sides of existing foundation pile 1 It after stake 2, then is newly built two and pours the formation door type structure of transform beams 3 on foundation pile 2, to be completed to underpin, specific structure such as Fig. 1 Shown in.
It is clear that door type structure span is bigger, it is also bigger to underpin enforcement difficulty.Door is newly built in the process in view of pile foundation underpinning Formula structural span is greater than the width of newly-built underground structure, thus for it is such underpin mode for, limit to a certain extent The horizontal span of newly-built underground structure has certain limitation to large space underground structure is constructed.
Meanwhile if when door type structure is constructed without space in the lower section of existing foundation pile structure, or need to carry out underground in advance dark Operation is dug, entirety is will lead to and underpins cost and the opposite raising of implement general plan.
Summary of the invention
The object of the present invention is to provide a kind of underground foundation pile pipe curtain support construction, underground foundation pile can be realized support and Load transfer and the span for not limiting newly-built underground structure below.
To achieve the above object, the underground foundation pile pipe curtain support construction designed by the present invention includes foundation pile and is arranged described Horizontal tube curtain around foundation pile, the horizontal tube curtain include branch trustship, rest pipe connections, implantation reinforcement connector and filling Object;The branch trustship is horizontally set on the foundation pile two sides, and is connected by the rest pipe connections to form a perforation Cavity;The implantation is reinforced connector and is laterally disposed in the cavity, and passes through the location hole on the foundation pile;The filler Filling is in the cavity.
Preferably, connection window is provided in the axial direction on corresponding tube wall between the two adjacent branch trustships;Two The branch trustship is respectively equipped between the bottom and upper segment of two opposite connection windows between the adjacent branch trustship to connect Fitting is connected.
Preferably, the branch trustship is steel pipe, and the rest pipe connections are junction steel plate, and the implantation is reinforced Connector is implantation reinforcing bar.
Preferably, filler is cast-in-place concrete.
Preferably, the rest pipe connections with the branch trustship length phase in the axial direction of the branch trustship Deng.
Preferably, the axial length of the branch trustship is 5~6 times of the diameter of the foundation pile.
Preferably, the branch trustship is arranged in parallel and is located in same level.
Preferably, horizontal parallel is provided with the more branch trustships, the implantation respectively for the two sides of the foundation pile Reinforce connector to extend transversely into each branch trustship.
Preferably, consolidated subsoil is equipped with grouting mode between underground structure below the horizontal tube curtain.
The present invention also aims to, a kind of underground foundation pile pipe curtain support construction construction method is provided, it can be to underground foundation pile It realizes support and load transfer and does not limit the span for creating underground structure below.
To achieve the above object, the underground foundation pile pipe curtain support construction construction method designed by the present invention, including following step It is rapid: (a) in the steel pipe of the two sides of foundation pile predetermined position difference jacking level;(b) slip casting is opened up on the inner wall of the steel pipe Hole, it is from the injected hole to stratum slip casting out of described steel pipe, the steel pipe is fixed in the earth formation;(c) out of described steel pipe Along axially grooved, the corresponding connection window of formation in the adjacent steel pipe wall;It (d) will be between the two adjacent steel pipes Soil remove;(e) respectively that the top of the connection window between the two adjacent steel pipes and two is adjacent with junction steel plate The steel pipe between the connection window following transverse weld connection;(f) determining of extending transversely through is opened on the foundation pile Implantation reinforcing bar is passed through the location hole, is placed in the steel pipe of the foundation pile two sides by position hole;(g) in the foundation pile two sides The steel pipe and the junction steel plate between inject cast-in-place concrete in the cavity that is formed, formed and be arranged around the foundation pile Horizontal tube curtain, the steel pipe, the junction steel plate, the implantation reinforcing bar and the existing foundation pile are linked into an integrated entity;(h) it cuts It cuts the foundation pile and is located at the horizontal tube curtain part below;(i) it is built in the stratum at the foundation pile cut newly-built Underground structure.
Preferably, further comprising the steps of after (i) step: (j) the horizontal tube curtain with it is described Slip casting forms consolidated subsoil between newly-built underground structure.
Preferably, in the step (a), vertical shaft is constructed near the foundation pile or utilizes the newly-built underground The vertical shaft of structure, steel pipe described in jacking.
The beneficial effects of the present invention are: underground foundation pile pipe curtain support construction and construction method of the invention passed through in foundation pile week Enclose setting branch trustship, rest pipe connections, implantation reinforce connector and filler and form horizontal tube curtain, realize foundation pile support and Load transfer, this mode security risk is small, at the same when being underpined for foundation pile to the span of newly-built underground structure also without limitation, tool There is significant advantage.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing pile foundation underpinning structure.
Fig. 2 is the structural schematic diagram of the underground foundation pile pipe curtain support construction of the first preferred embodiment of the present invention.
Fig. 3 is the enlarged structure schematic diagram in Fig. 2 at I.
Fig. 4 is the amplification sectional view in the direction A-A along Fig. 2.
Fig. 5 is the structural schematic diagram of the underground foundation pile pipe curtain support construction of the second preferred embodiment of the present invention.
Each part numbers are as follows in figure: existing foundation pile 1 newly builds foundation pile 2, transform beams 3,4 (wherein, steel pipe of horizontal tube curtain 4.1, junction steel plate 4.2, implantation reinforcing bar 4.3, cast-in-place concrete 4.4), consolidated subsoil 5, newly-built underground structure 6.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
According to above-mentioned the deficiencies in the prior art, underground foundation pile pipe curtain support construction of the invention is using pipe curtain mode to building The underground pile foundation of object is supported or existing foundation pile underpins.Referring to Fig. 2, the underground foundation pile pipe of first preferred embodiment of the invention Curtain support construction includes the horizontal tube curtain 4 being arranged in around existing foundation pile 1 and connects horizontal tube curtain 4 and newly-built underground structure 6 The consolidated subsoil 5 connect.
Please refer to Fig. 3 and Fig. 4, horizontal tube curtain 4 includes steel pipe 4.1, junction steel plate 4.2, implantation reinforcing bar 4.3 and cast-in-place Concrete 4.4.Steel pipe 4.1 is horizontally set on the two sides of existing foundation pile 1, and the steel pipes 4.1 of two sides is towards on the tube wall of existing foundation pile 1 Accordingly it is equipped with connection window.Two pieces of junction steel plates 4.2 are respectively from being vertically connected with two sides steel pipe 4.1, one of junction steel plate The top edge of the connection window of the 4.2 existing 1 two sides steel pipes 4.1 of foundation pile of connection, another piece of junction steel plate 4.2 connect existing foundation pile 1 The lower edge of the connection window of two sides steel pipe 4.1.Junction steel plate 4.2 and steel pipe 4.1 are welded to connect.Reinforcing bar 4.3 is implanted into pass through both There is foundation pile 1 and is protruded into the steel pipe 4.1 of two sides by the connection window on the tube wall of steel pipe 4.1.The steel pipe 4.1 of two sides and two pieces It is perfused with cast-in-place concrete 4.4 between in the cavity that junction steel plate 4.2 is formed, so that horizontal tube curtain 4 and existing foundation pile 1 be formed It is integrated, completes load transfer foundation pile and underpin, the existing foundation pile 1 of 4 lower section of horizontal tube curtain can be clipped.
To further strengthen structure, consolidated subsoil 5 is had with grouting mode between horizontal tube curtain 4 and newly-built underground structure 6, It will be on the load conversion of horizontal tube curtain 4 to newly-built underground structure 6.
It is noted that the axial length of steel pipe 4.1 should be greater than the diameter of existing foundation pile 1, preferably existing foundation pile 1 it is straight 5~6 times of diameter.Junction steel plate 4.2 and the equal length in the axial direction of steel pipe 4.1 of steel pipe 4.1.
Referring to Fig. 5, the underground foundation pile pipe curtain support construction of second preferred embodiment of the invention includes being arranged in existing base Horizontal tube curtain 4 around stake 1.
Horizontal tube curtain 4 includes steel pipe 4.1, junction steel plate 4.2, implantation reinforcing bar 4.3 and cast-in-place concrete 4.4.Horizontal tube curtain 4 In the two sides of existing foundation pile 1 it is respectively equipped with two horizontal steel pipes 4.1, face in the horizontal direction between adjacent steel pipe 4.1 Offer connection window on tube wall, two pieces of junction steel plates 4.2 are respectively from being vertically connected with two adjacent steel pipes 4.1.One of company The top edge for connecting window that steel plate 4.2 connects the face of two adjacent steel pipes 4.1 is connect, another piece of junction steel plate 4.2 connects two-phase The lower edge of the connection window of the face of adjacent steel pipe 4.1.Reinforcing bar 4.3 is implanted into pass through existing foundation pile 1 and pass through the tube wall of steel pipe 4.1 On connection window protrude into the steel pipe 4.1 of two sides.In the cavity that the steel pipe 4.1 of two sides and two pieces of junction steel plates 4.2 are formed it Between be perfused with cast-in-place concrete 4.4, so that horizontal tube curtain 4 and existing foundation pile 1 are formed as one, complete load transfer foundation pile support It changes, the existing foundation pile 1 of 4 lower section of horizontal tube curtain can be clipped.
In the present embodiment, consolidated subsoil 5 as in the first embodiment can also be set below horizontal tube curtain 4.
By the description to first embodiment and second embodiment it is found that underground foundation pile pipe curtain support construction of the invention In, in horizontal tube curtain 4 quantity of the steel pipe 4.1 of existing 1 two sides of foundation pile according to the load of existing foundation pile 1 determine, can also every side set Set more parallel steel pipes 4.1.
It should be pointed out that underground foundation pile pipe curtain support construction of the invention removes the existing foundation pile 1 in underground for building Outside underpining, the ground prop of newly-built foundation pile also can be directly used for.
For by the underground to building, existing foundation pile is underpined below, underground foundation pile pipe curtain support construction of the invention is applied Work method is described in detail comprising following steps:
(a) firstly, constructing vertical shaft near the quasi- existing foundation pile 1 underpined, or existing newly-built underground structure 6 is utilized Vertical shaft, in the steel pipe 4.1 of the two sides difference jacking level of quasi- 1 predetermined position of existing foundation pile underpined.Existing foundation pile 1 it is each The quantity of side steel pipe 4.1 can be more of one or parallel arrangement, be determined according to the load of existing foundation pile 1.
(b) injected hole is opened up on the inner wall of steel pipe 4.1, from injected hole to stratum slip casting out of steel pipe 4.1, by steel pipe 4.1 fix in the earth formation.The diameter of steel pipe 4.1 need to meet for construction personnel's entrance, such as the diameter of steel pipe 4.1 can be 1.8 ~2 meters.
(c) out of steel pipe 4.1 on adjacent 4.1 tube wall of steel pipe along axially grooved, form corresponding connection window.
(d) soil between two adjacent steel pipes 4.1 is removed, in order to the construction of next step.
(e) with junction steel plate 4.2 respectively by steel plate by between two adjacent steel pipes 4.1 connection window top and two-phase The following transverse weld connection of connection window between adjacent steel pipe 4.1.
(f) location hole extended transversely through is opened on existing foundation pile 1, implantation reinforcing bar 4.3 is passed through into location hole, is placed in existing base In the steel pipe 4.1 of 1 two sides of stake.Because being limited by underground construction operating space, implantation reinforcing bar 4.3 is welded using multistage bar dowel It is formed by connecting, can be welded in implantation in work progress.
(g) cast-in-place coagulation is injected in the cavity formed between the steel pipe 4.1 and junction steel plate 4.2 of existing 1 two sides of foundation pile Soil 4.4 forms the horizontal tube curtain 4 being arranged in around existing foundation pile 1.Horizontal tube curtain 4 by steel pipe 4.1, junction steel plate 4.2, implantation Reinforcing bar 4.3 links into an integrated entity with existing foundation pile 1.
(h) after the completion of horizontal tube curtain 4 is constructed, that is, the load transfer to existing foundation pile 1, existing foundation pile cleavable at this time are formed 1 is located at the part below of horizontal tube curtain 4, completes foundation pile and underpins.
(i) in the stratum at the existing foundation pile 1 cut, newly-built underground structure 6 can be built, creating underground structure 6 can Newly-built subterranean tunnel and its supporting construction etc..
(j) finally, the case where regarding newly-built underground structure 6, decides whether between horizontal tube curtain 4 and newly-built underground structure 6 Slip casting forms consolidated subsoil 5, will be on load conversion to newly-built underground structure 6.
Underground foundation pile pipe curtain support construction and construction method of the invention by around foundation pile be arranged horizontal tube curtain, in water Setting consolidated subsoil realizes support and load transfer to foundation pile below flat pipe curtain, and this mode security risk is small, is used for simultaneously There is significant advantage also without limitation to the span of newly-built underground structure when foundation pile underpins.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (12)

1. a kind of underground foundation pile pipe curtain support construction, it is characterised in that: including foundation pile (1) and be arranged around the foundation pile (1) Horizontal tube curtain (4), the horizontal tube curtain (4) includes that connector and filler are reinforced in branch trustship, rest pipe connections, implantation; The branch trustship is horizontally set on the foundation pile (1) two sides, and is connected by the rest pipe connections to form a perforation Cavity;The implantation is reinforced connector and is laterally disposed in the cavity, and passes through the location hole on the foundation pile (1);It is described to fill out Fill object filling in the cavity.
2. underground foundation pile pipe curtain support construction according to claim 1, it is characterised in that: between the two adjacent branch trustships Connection window is provided in the axial direction on corresponding tube wall;Two opposite connection windows between the two adjacent branch trustships The rest pipe connections are respectively equipped between bottom and upper segment to be connected.
3. underground foundation pile pipe curtain support construction according to claim 1, it is characterised in that: the branch trustship is steel pipe (4.1), the rest pipe connections are junction steel plate (4.2), and it is implantation reinforcing bar (4.3) that connector is reinforced in the implantation.
4. underground foundation pile pipe curtain support construction according to claim 1, it is characterised in that: filler is cast-in-place concrete (4.4)。
5. underground foundation pile pipe curtain support construction according to claim 1, it is characterised in that: the rest pipe connections and institute State branch trustship equal length in the axial direction of the branch trustship.
6. underground foundation pile pipe curtain support construction according to claim 5, it is characterised in that: the axial length of the branch trustship It is 5~6 times of the diameter of the foundation pile (1).
7. underground foundation pile pipe curtain support construction according to claim 1, it is characterised in that: the branch trustship be arranged in parallel and In same level.
8. underground foundation pile pipe curtain support construction according to claim 1, it is characterised in that: the two sides of the foundation pile (1) point Other horizontal parallel is provided with the more branch trustships, and the implantation is reinforced connector and extended transversely into each branch trustship.
9. underground foundation pile pipe curtain support construction according to any one of claim 1 to 8, it is characterised in that: the level Consolidated subsoil (5) are equipped with grouting mode between underground structure (6) below pipe curtain (4).
10. a kind of underground foundation pile pipe curtain support construction construction method, comprising the following steps:
(a) in the steel pipe (4.1) of the two sides of foundation pile (1) predetermined position difference jacking level;
(b) injected hole is opened up on the inner wall of the steel pipe (4.1), from the injected hole to stratum out of the steel pipe (4.1) Slip casting, the steel pipe (4.1) are fixed in the earth formation;
(c) out of the steel pipe (4.1) on the adjacent steel pipe (4.1) tube wall along axially grooved, form corresponding connection Window;
(d) soil between the two adjacent steel pipes (4.1) is removed;
(e) with junction steel plate (4.2) respectively by the top and two of the connection window between the two adjacent steel pipes (4.1) The following transverse weld of the connection window between the adjacent steel pipe (4.1) connects;
(f) location hole extended transversely through is opened on the foundation pile (1), implantation reinforcing bar (4.3) is passed through into the location hole, is placed in institute In the steel pipe (4.1) for stating foundation pile (1) two sides;
(g) note in the cavity formed between the steel pipe (4.1) and the junction steel plate (4.2) of the foundation pile (1) two sides Enter cast-in-place concrete (4.4), formed and horizontal tube curtain (4) around the foundation pile (1) is set, by the steel pipe (4.1), described Junction steel plate (4.2), the implantation reinforcing bar (4.3) and the existing foundation pile (1) link into an integrated entity;
(h) it cuts the foundation pile (1) and is located at the horizontal tube curtain (4) part below;
(i) newly-built underground structure (6) are built in the stratum at the foundation pile (1) cut.
11. underground foundation pile pipe curtain support construction construction method according to claim 10, which is characterized in that at (i) It is further comprising the steps of after step:
(j) slip casting forms consolidated subsoil (5) between the horizontal tube curtain (4) and the newly-built underground structure (6).
12. underground foundation pile pipe curtain support construction construction method according to claim 10, it is characterised in that: in the step (a) in, nearby vertical shaft is constructed in the foundation pile (1) or utilizes the vertical shaft of the newly-built underground structure (6), steel pipe described in jacking (4.1)。
CN201710019635.XA 2017-01-11 2017-01-11 Underground foundation pile pipe curtain support construction and construction method CN106638732B (en)

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Application Number Priority Date Filing Date Title
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JP3213240B2 (en) * 1996-07-11 2001-10-02 株式会社奥村組 Support pile reinforcement structure of existing structure and its reinforcement method
CN1288308C (en) * 2004-01-17 2006-12-06 上海市城市建设设计研究院 Method for constructing deep-large foundation pit over operating tunnel an ddeformation-preventing strucutre
CN1800513A (en) * 2005-12-13 2006-07-12 上海市第二市政工程有限公司 Steel pipe roof jacking construction method
CN101294447B (en) * 2007-04-23 2010-04-14 上海市城市建设设计研究院 Buildings pile underpinning method
CN103556579B (en) * 2013-11-14 2016-01-06 天津市水利工程有限公司 A kind of comprehensive grouting pressurize adds the box culvert pushing construction method of pipe curtain supporting
CN203960901U (en) * 2014-07-14 2014-11-26 广东南方电信规划咨询设计院有限公司 A kind of non-migrating formula of people/hand well of communicating by letter supports protection system
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CN206448300U (en) * 2017-01-11 2017-08-29 中铁第四勘察设计院集团有限公司 Underground foundation pile pipe curtain supporting construction

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