CN103590408B - The perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof - Google Patents
The perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof Download PDFInfo
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- CN103590408B CN103590408B CN201310595844.0A CN201310595844A CN103590408B CN 103590408 B CN103590408 B CN 103590408B CN 201310595844 A CN201310595844 A CN 201310595844A CN 103590408 B CN103590408 B CN 103590408B
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Abstract
The perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof, wherein support system comprises the front-seat slope protection pile being positioned at side slope place, base hole, it is arranged in rear row's slope protection pile of the good ground in outside, base hole, and the connection beam being connected between the stake top of front-seat slope protection pile and the stake top of rear row's slope protection pile, described connection beam is lattice beam, after described, the outside of row's slope protection pile is also provided with row's vertical prestressed anchor bar, anchor pole coupling beam in this row top of vertical prestressed anchor bar and lattice beam flexibly connects, in the good ground of the lower anchor of this row's vertical prestressed anchor bar outside rear row's slope protection pile. this support system and constructional method thereof are provided with vertical prestressed anchor bar, so improving the stake body force-bearing situation of whole structure, optimizing whole supporting construction, making whole supporting construction become more reasonable.
Description
Technical field
The present invention relates to a kind of building foundation pit supporting system and constructional method thereof.
Background technology
Build in Foundation Pit Support Design construction, common are (compound) plate brad supporting, the supporting types such as supporting are supportted in stake (wall) anchor supporting, stake (wall) and the combination of wherein two or more supporting type, and the pattern foundation pit supporting structure of overwhelming majority engineering project adopts above-mentioned supporting type at present.
In recent years, along with the quickening of urban construction process, in urban district, building sharply increases, site coverage is more and more high, land resources is more and more nervous, and ground, underground can utilize space fewer and feweri, much plans to build building and seizes every opportunity, it is forced in existing building side and builds very nearby apart from existing building, so also causing following problems while making full use of soil:
(1) owing to newly-started building foundation pit is close to existing building, cause the slope support method of new building Ji Keng to be difficult to choose, can not take to put slope excavation, (compound) plate brad supporting can not be carried out again.
(2) if taking the measure such as pile-anchor retaining or joist anchor supporting, owing to the restriction in soil body space behind slope is (because of the restriction on existing building basis, behind slope, soil body width is limited), so anchor pole angle is relatively big, supporting effect is poor, the anchor pole and some side slopes cannot be constructed at all, in this kind of situation, although adopting in inner support scheme feasible, but its implementation cost is higher, operation is numerous and diverse, the construction duration is longer, and soil excavation and main structure body construction infection is serious.
(3) in recent years, double-row pile structure obtains certain development, has certain advantage, but the foundation depth of traditional double-row pile structural support is limited, and supporting safety coefficient is lower in next-door neighbour's existing building foundation pit stope support, and slope deforming is bigger.
Present circumstances is seen, completed or the many next-door neighbour's existing buildings built base hole slope project, its supporting effect is all not satisfactory, slope deforming is bigger, particularly the foundation pit accident of slope top distortion and so on happens occasionally, so for the defect of above-mentioned all kinds supporting construction self, not finding temporarily to be used for the limited next-door neighbour existing building Ji Keng of the underground space, not only there is good supporting effect but also easy construction and the simple novel supporting type of operation can be had concurrently.
Summary of the invention
It is an object of the invention to provide the perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof, solve be applied in the limited next-door neighbour's existing building base of the underground space cheat in the supporting effect that has of supporting construction is poor, technical barrier that is loaded down with trivial details and complex procedures of constructing.
For achieving the above object, the present invention adopts following technical scheme: the perpendicular anchor support system of a kind of double-row pile beam, comprise the front-seat slope protection pile being positioned at side slope place, base hole, it is arranged in rear row's slope protection pile of the good ground in outside, base hole, and the connection beam being connected between the stake top of front-seat slope protection pile and the stake top of rear row's slope protection pile, it is characterized in that: described connection beam is lattice beam, by the front campshed apical cap beam being rigidly attached to front-seat slope protection pile stake top, the rear campshed apical cap beam on slope protection pile stake top is arranged after being rigidly attached to, it is positioned at anchor pole coupling beam outside rear campshed apical cap beam and opposing parallel with rear campshed apical cap beam, it is connected between front campshed apical cap beam and rear campshed apical cap beam and builds, with front campshed apical cap beam and rear campshed apical cap beam, the front coupling beam being integrated, and be connected between rear campshed apical cap beam and anchor pole coupling beam and build with rear campshed apical cap beam and anchor pole coupling beam be integrated rear coupling beam composition, after described, the outside of row's slope protection pile is also provided with row's vertical prestressed anchor bar, and the anchor pole coupling beam in top and the lattice beam of this row's vertical prestressed anchor bar flexibly connects, in the good ground of this lower anchor arranging vertical prestressed anchor bar outside rear row's slope protection pile.
Can being provided with default steel pipe in described anchor pole coupling beam, the top of described vertical prestressed anchor bar is through presetting steel pipe and is flexibly connected by anchor head and backing plate and anchor pole coupling beam.
The rod body material of described vertical prestressed anchor bar can be steel strand, reinforcing bar or Steel Tendon.
Described lattice beam can be cast-in-place beam or precast beam.
Described front-seat slope protection pile can be square slope protection pile or circular slope protection pile.
After described, row's slope protection pile can be square slope protection pile or circular slope protection pile.
The constructional method of the perpendicular anchor support system of above-mentioned double-row pile beam, it is characterised in that construction procedure is as follows: step one, according to working drawing requirement, carry out measurement and positioning; Step 2, driller insertion, carry out the construction of front-seat slope protection pile and rear row's slope protection pile; Step 3, construction vertical prestressed anchor bar; Step 4, construction lattice beam, lattice beam is embedded with default steel pipe; Step 5, front-seat slope protection pile, arrange design strength that slope protection pile, vertical prestressed anchor bar and lattice beam reach regulation afterwards after, vertical prestressed anchor bar is carried out tensioning fixation, vertical prestressed anchor bar and lattice beam is flexibly connected; Step 6, excavation of foundation pit, and can according to the data of monitoring, optionally carry out the follow-up benefit stretch-draw operation of vertical prestressed anchor bar.
Compared with prior art the present invention has following feature and useful effect: present invention employs double-row pile structure, the underground space taken can be reduced like this, it is applicable to the next-door neighbour existing building Ji Keng that the underground space that common pile-anchor supporting system cannot apply is limited, certainly, the present invention also has good supporting effect in the foundation pit stope support of routine.
Compared with traditional Retaining Structure with Double-row Piles, the present invention is also provided with vertical prestressed anchor bar in good ground outside double-row pile, vertical prestressed anchor bar can make full use of the anchor force that deep soil layer provides, the effective antidumping safety coefficient increasing double-row pile, reducing the building-in depth of a body, that is, vertical prestressed anchor bar improves the stake body force-bearing situation of whole structure, optimize whole supporting construction, make whole supporting construction become more reasonable.
Compared with traditional Retaining Structure with Double-row Piles of same size, the present invention can reduce top distortion, slope (distortion of stake top), improves the stake body force-bearing situation of slope protection pile, it is to increase the cantilever height of slope protection pile, under equal conditions, applicable in darker Ji Keng.
Compared with traditional Retaining Structure with Double-row Piles, when the base for same size is cheated, under the prerequisite not affecting deep pit monitor coefficient, the present invention can effectively reduce that stake is long and stake footpath, saves engineering materials, reduces construction cost, shortens the construction duration.
All working procedures of the present invention, all at ground construction, compared with traditional supporting construction, avoid the crossed construction in hole, shorten the duration, simplify operation, it is to increase safety.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is the perspective view of the present invention.
Fig. 2 is the facade structures schematic diagram of the present invention.
Fig. 3 is the schematic top plan view of Fig. 2.
Fig. 4 is the plan structure schematic diagram at the connection node place of lattice beam and vertical prestressed anchor bar.
Fig. 5 is the facade structures schematic diagram at the connection node place of lattice beam and vertical prestressed anchor bar.
The front-seat slope protection pile of Reference numeral: 1-, 2-connect beam, 2.1-before after campshed apical cap beam, 2.2-before campshed apical cap beam, 2.3-anchor pole coupling beam, 2.4-after coupling beam, 2.5-coupling beam, 3-vertical prestressed anchor bar, 4-backing plate, 5-anchor head, 6-arrange soil layer under slope protection pile, 10-substrate after presetting steel pipe, 7-existing building basis, 8-good ground, 9-.
Embodiment
Embodiment is see shown in Fig. 1-3, the perpendicular anchor support system of this kind of double-row pile beam, the rear row's slope protection pile 9 comprising the good ground 8 (namely at front-seat slope protection pile 1 and existing building basis 7 or the good ground 8 between red line region, underground obstacle etc.) in the front-seat slope protection pile 1 being arranged in side slope place, base hole, the outside, hole that is arranged in base and the connection beam 2 being connected between the stake top of front-seat slope protection pile and the stake top of rear row's slope protection pile.
Described connection beam is lattice beam, by the front campshed apical cap beam 2.1 being rigidly attached to front-seat slope protection pile stake top, the rear campshed apical cap beam 2.2 on slope protection pile stake top is arranged after being rigidly attached to, it is positioned at anchor pole coupling beam 2.3 outside rear campshed apical cap beam and opposing parallel with rear campshed apical cap beam, it is connected between front campshed apical cap beam and rear campshed apical cap beam and builds, with front campshed apical cap beam and rear campshed apical cap beam, the front coupling beam 2.4 being integrated, and be connected between rear campshed apical cap beam and anchor pole coupling beam and build, with rear campshed apical cap beam and anchor pole coupling beam, the rear coupling beam 2.5 being integrated and form.
After described, the outside of row's slope protection pile 9 is also provided with row's vertical prestressed anchor bar 3, anchor pole coupling beam 2.3 in top and the lattice beam of this row's vertical prestressed anchor bar 3 flexibly connects, in the good ground 8 of this lower anchor arranging vertical prestressed anchor bar 3 outside rear row's slope protection pile 9.
The bottom of described front-seat slope protection pile 1 and rear row's slope protection pile 9 all stretches under substrate in soil layer 10, concrete length is determined by design according to the soil layer situation at residing position, the height that lattice beam is stretched on the stake top of front-seat slope protection pile 1 and rear row's slope protection pile 9 meets national sector standard, such as 50mm.
Described front-seat slope protection pile 1 is square slope protection pile, circular slope protection pile or other abnormity slope protection pile, rear row's slope protection pile 9 is square slope protection pile, circular slope protection pile or other abnormity slope protection pile, the pile-type of front-seat slope protection pile 1 and rear row's slope protection pile 9 adopts pile-type general at present, such as steel sheet pile, reinforced concrete pile and steel tube concrete pile etc. Pile-type, soil layer situation and surrounding enviroment that the constructional method of front-seat slope protection pile 1 and rear row's slope protection pile 9 adopts depending on design are determined, such as manual pore-forming, long spire, revolve constructional methods such as digging.
Described lattice beam is for being connected to become entirety by front row slope protection pile 1 and rear row's slope protection pile 9, and the anchor force of vertical prestressed anchor bar 3 is delivered in front-seat slope protection pile 1 and rear row's slope protection pile 9. Lattice beam is cast-in-place beam or precast beam, and such as skeleton construction etc., the horizontal plane arrangement form of lattice beam (namely connects the pattern of beam 2.3) and determines by design depending on loading characteristic, in such as the present embodiment, employing be rectangle frame form.
The rod body material of described vertical prestressed anchor bar 3 adopts conventional material, such as steel strand, reinforcing bar or Steel Tendon etc. Vertical prestressed anchor bar is made up of anchoring section and free segment, and length allocation, the prestressed stretch-draw lock value of anchoring section and free segment are determined by design; The injecting paste material of the anchoring section of vertical prestressed anchor bar 3 is grout or other slurries; Vertical prestressed anchor bar is holed by drilling machine construction or manual pore-forming, utilizes hollow screw block to carry out tensioning fixation.
See Fig. 4, Fig. 5, in the present embodiment, anchor pole coupling beam 2.3 is provided with default steel pipe 6, and the top of described vertical prestressed anchor bar 3 is through presetting steel pipe 6 and is flexibly connected with anchor pole coupling beam 2.3 by anchor head 5 and backing plate 4.
In Ji Keng (being especially close to the Ji Keng of existing building) supporting, the construction procedure of the present invention is as follows.
Step one, according to working drawing requirement, carry out measurement and positioning.
Step 2, driller insertion, carry out the construction of front-seat slope protection pile 1 and rear row's slope protection pile 9.
Step 3, construction vertical prestressed anchor bar 3.
Step 4, construction lattice beam, lattice beam is embedded with default steel pipe 6.
Vertical prestressed anchor bar 3 is carried out tensioning fixation, vertical prestressed anchor bar 3 and lattice beam is flexibly connected after reaching the design strength of regulation by step 5, front-seat slope protection pile 1, rear row's slope protection pile 9, vertical prestressed anchor bar 3 and lattice beam.
Step 6, excavation of foundation pit, and can according to the data of monitoring, optionally carry out the follow-up benefit stretch-draw operation of vertical prestressed anchor bar 3.
Content described in this specification sheets embodiment is only enumerating of the way of realization to invention design; protection scope of the present invention should not be regarded as being only limitted to the specific form that embodiment is stated, protection scope of the present invention is also and the equivalent technologies means can expected according to present inventive concept in those skilled in the art. When the axis direction of vertical prestressed anchor bar and vertical direction angle are smaller angle (< 30 °), also belong to the vertical prestressed anchor bar described in this patent, also it is the scope of this patent protection.
Claims (7)
1. the perpendicular anchor support system of double-row pile beam, the connection beam (2) comprising the front-seat slope protection pile (1) being arranged in side slope place, base hole, rear row's slope protection pile (9) of good ground (8) in the outside, hole that is positioned at base and be connected between the stake top of front-seat slope protection pile and the stake top of rear row's slope protection pile, it is characterised in that:
Described connection beam is lattice beam, by front campshed apical cap beam (2.1) being rigidly attached to front-seat slope protection pile stake top, rear campshed apical cap beam (2.2) on slope protection pile stake top is arranged after being rigidly attached to, it is positioned at anchor pole coupling beam (2.3) outside rear campshed apical cap beam and opposing parallel with rear campshed apical cap beam, it is connected between front campshed apical cap beam and rear campshed apical cap beam and builds, with front campshed apical cap beam and rear campshed apical cap beam, the front coupling beam (2.4) being integrated, and be connected between rear campshed apical cap beam and anchor pole coupling beam and build with rear campshed apical cap beam and anchor pole coupling beam be integrated rear coupling beam (2.5) composition,
The outside arranging slope protection pile (9) after described is provided with row's vertical prestressed anchor bar (3), anchor pole coupling beam (2.3) in top and the lattice beam of this row's vertical prestressed anchor bar (3) flexibly connects, and lower anchor of this row's vertical prestressed anchor bar (3) is in the good ground (8) outside rear row's slope protection pile (9).
2. the perpendicular anchor support system of a kind of double-row pile beam according to claim 1, it is characterized in that: described anchor pole coupling beam (2.3) is provided with default steel pipe (6), the top of described vertical prestressed anchor bar (3) is through presetting steel pipe (6) and is flexibly connected with anchor pole coupling beam (2.3) by anchor head (5) and backing plate (4).
3. the perpendicular anchor support system of a kind of double-row pile beam according to claim 1, it is characterised in that: the rod body material of described vertical prestressed anchor bar (3) is steel strand, reinforcing bar or Steel Tendon.
4. the perpendicular anchor support system of a kind of double-row pile beam according to claim 1, it is characterised in that: described lattice beam is cast-in-place beam or precast beam.
5. the perpendicular anchor support system of a kind of double-row pile beam according to claim 1, it is characterised in that: described front-seat slope protection pile (1) is square slope protection pile or circular slope protection pile.
6. the perpendicular anchor support system of a kind of double-row pile beam according to claim 1, it is characterised in that: arrange slope protection pile (9) after described for square slope protection pile or circular slope protection pile.
7. the constructional method of the perpendicular anchor support system of double-row pile beam described in any one in a claims 1-6, it is characterised in that construction procedure is as follows:
Step one, according to working drawing requirement, carry out measurement and positioning;
Step 2, driller insertion, carry out the construction of front-seat slope protection pile (1) and rear row's slope protection pile (9);
Step 3, construction vertical prestressed anchor bar (3);
Step 4, construction lattice beam;
Step 5, front-seat slope protection pile (1), arrange design strength that slope protection pile (9), vertical prestressed anchor bar (3) and lattice beam (2) reach regulation afterwards after, vertical prestressed anchor bar (3) is carried out tensioning fixation, vertical prestressed anchor bar (3) and lattice beam is flexibly connected;
Step 6, excavation of foundation pit, and according to the data of monitoring, optionally carry out the follow-up benefit stretch-draw operation of vertical prestressed anchor bar (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595844.0A CN103590408B (en) | 2013-11-25 | 2013-11-25 | The perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595844.0A CN103590408B (en) | 2013-11-25 | 2013-11-25 | The perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof |
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| CN103590408A CN103590408A (en) | 2014-02-19 |
| CN103590408B true CN103590408B (en) | 2016-06-15 |
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| CN201310595844.0A Expired - Fee Related CN103590408B (en) | 2013-11-25 | 2013-11-25 | The perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof |
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| CN104563129B (en) * | 2014-12-31 | 2016-05-25 | 云南建工基础工程有限责任公司 | A kind of pile body is provided with the Double-row-piles Structure that adds the stake of core horizontal jet grouting |
| CN110004938A (en) * | 2019-03-27 | 2019-07-12 | 中冶成都勘察研究总院有限公司 | A kind of foundation pit side-wall structural strengthening suspension device |
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| CN111648378A (en) * | 2020-06-16 | 2020-09-11 | 深圳市勘察测绘院(集团)有限公司 | Square-round pile combined foundation pit supporting method |
| CN112681333B (en) * | 2020-12-15 | 2022-07-12 | 中国建筑第八工程局有限公司 | Foundation pit supporting structure of waterside bridge abutment foundation and construction method thereof |
| CN112921987A (en) * | 2021-04-19 | 2021-06-08 | 湖南大学 | Deep foundation pit supporting structure and deep foundation pit construction method |
| CN113513026A (en) * | 2021-04-22 | 2021-10-19 | 中建八局第二建设有限公司 | Soft soil foundation deep foundation pit pile end rear anchoring combined steel sheet pile and construction method thereof |
| CN113550322A (en) * | 2021-07-09 | 2021-10-26 | 上海市基础工程集团有限公司 | Enclosure system next to deep and shallow foundation pit and construction method |
| CN113802573A (en) * | 2021-09-28 | 2021-12-17 | 天津中勘天泽建筑工程设计有限公司 | Foundation pit prestress pressing plate type multi-row supporting structure and method |
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