CN104018495A - Bilateral haunched beam circular section anti-slide pile and construction method thereof - Google Patents
Bilateral haunched beam circular section anti-slide pile and construction method thereof Download PDFInfo
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- CN104018495A CN104018495A CN201410199125.1A CN201410199125A CN104018495A CN 104018495 A CN104018495 A CN 104018495A CN 201410199125 A CN201410199125 A CN 201410199125A CN 104018495 A CN104018495 A CN 104018495A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a bilateral haunched beam circular anti-slide pile and a construction method thereof. The bilateral haunched beam circular anti-slide pile comprises a circular upright pile body, a back side circular horizontal haunched beam and a face side circular horizontal haunched beam and further comprises a back side inclined support and a face side installation support. The back side circular horizontal haunched beam is arranged on the back side of the circular upright pile body, and the face side circular horizontal haunched beam is arranged on the face side of the circular upright pile body. The bilateral haunched beam circular anti-slide pile and the construction method thereof have the advantages that dead weight pressure of rock bodies before and behind the pile, the anti-pressure capability of the standing ground and the load bearing and slide resisting functions of the horizontal haunced beams are given full play according to the stress mode of the anti-slide pile and the space distribution feature of the bending moment and shearing force of the pile body, the stress strength of the pile body is improved, and the bending resisting and shearing resisting capabilities of the anti-slide pile are improved. The anti-slide pile is simple in structural type, high in anti-slide performance, easy to construct, suitable for high and steep slope or foundation pit engineering and also suitable for large landslide control engineering. The construction method of forming holes through a dry method by adopting a rotary excavating machine is adopted, the construction effect is high, the maneuvering characteristics are high, and safety coefficients are high.
Description
Technical field
The present invention relates to major landslip improvement, high steep stile slope and Base hole supporting technology field, be specifically related to a kind of bilateral haunched beam retailing piles with round section and construction method thereof.
Background technology
The measure of administering at present landslide, side slope mainly contains draining, a gear, anchoring, loss of weight and back-pressure etc.The advantages such as wherein antislide pile props up gear measure rigidity is large owing to himself having, self-stability can be better, easy construction, consolidation effect are obvious are able to extensive use in landslide control and side slope protection engineering.Antislide pile operating principle be mainly by the embedding of fixed section Rock And Soil make with and passive resisting force come Thrust of Landslide or the side slope soil pressure of balance free segment Rock And Soil, by Rock And Soil between stake and the frictional resistance of stake both sides, form soil arching effect simultaneously, stop Rock And Soil between stake to be extruded between stake, make landslide or side slope keep balance or stable.Antislide pile cross section mainly contains two kinds of rectangle and circle shapes, and wherein hand excavated pile mostly is rectangle, and such bending resistance and shear behavior are better, but the construction period is longer, and cost is higher; It is circular that mechanical hole building castinplace pile mostly is, and such pile driving construction duration is shorter, and cost is lower, but bending resistance and shear behavior are poor, and reliability is relatively low.
In existing antislide pile single pile design, no matter be rectangle or circular antislide pile, its pile body is all straight pilework conventionally, fails to take into full account the stake front and back comprehensive utilization of Rock And Soil and the spatial distribution characteristic of bending and shearing.When Thrust of Landslide or side slope soil pressure are when larger, often adopt and increase antislide pile section area and quantity of reinforcement or the measures such as prestress anchorage cable are set at pile body, to improve the anti-skid ability of antislide pile self, reach the object of balance Thrust of Landslide or side slope soil pressure.Not only engineering quantity is large, treatment cost is high to increase antislide pile section area and quantity of reinforcement measure, easily cause engineering waste, and when being subject to land red-line or existing construction of structures space constraint, site operation difficulty is larger, limited effective use of traditional antislide pile; Pile body arranges prestress anchorage cable measure, and because anchor cable cost is higher, working procedure is loaded down with trivial details, and anchor cable prestressing force is along with the increase of time easily produces relaxation loss, obviously not enough for permanent landslide or its reliability of Reinforcement Works of Rock Slopes.As can be seen here, how to take into full account the stake front and back comprehensive utilization of Rock And Soil and the stress characteristic of antislide pile pile body, the structural form of appropriate design antislide pile, is very important to cost-effective improvement major landslip and high steep stile slope.
Summary of the invention
The present invention seeks to the limitation in administering major landslip and high steep vertical slope project for traditional anti-slide pile structure form, in conjunction with antislide pile, be subject to the spatial distribution characteristic of force mode and bending and shearing, take make full use of after stake, the gravity pressure of Rock And Soil and the anti-pressure ability of good ground are cutting point after stake, provide little, cheap, the anti-skid performance of a kind of engineering quantity strong, be easy to construction, and can be widely used in bilateral haunched beam retailing piles with round section and the construction method thereof of major landslip or high steep vertical slope treatment.
A kind of bilateral haunched beam of the present invention retailing piles with round section, comprising: circular upright pile body, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam of face side; The circular horizontal haunched beam of dorsal part is arranged on circular upright pile body dorsal part, and the circular horizontal haunched beam of face side is arranged on circular upright pile body face side.
Also comprise that dorsal part tiltedly holds in the palm, the circular horizontal haunched beam upside of described dorsal part is with circular upright pile body is vertical is connected, and the circular horizontal haunched beam downside of dorsal part and circle uprightly pile body are tiltedly held in the palm and are connected by dorsal part.
Also comprise the holder of face skew back, the circular horizontal haunched beam downside of described face side is with circular upright pile body is vertical is connected, and the circular horizontal haunched beam upside of face side and circle uprightly pile body are connected by the holder of face skew back.
The circular horizontal haunched beam of described dorsal part is arranged on circular upright pile body dorsal part, apart from the above distance I of intersection point of Side Slope crack face or landslide slide surface and circular upright pile body dorsal part
1be not less than 2.0m; The circular horizontal haunched beam of described dorsal part passes through Side Slope crack face or landslide slide surface extend into the degree of depth I in good ground
2be not less than the upright pile body diameter D of circle of 2 times
1.
The circular horizontal haunched beam of described face side is arranged on circular upright pile body face side, apart from the following distance I of intersection point of Side Slope crack face or landslide slide surface and circular upright pile body face side
3be not less than 2.0m.
Circular upright pile body diameter of section D
1, the circular horizontal haunched beam diameter of section D of dorsal part
2and the circular horizontal haunched beam diameter of section D of face side
3identical, D
1=D
2=D
3=1.5 ~ 2.0m.
The circular horizontal haunched beam length I of described face side
4be not less than the upright pile body diameter D of circle of 3 times
1.
Described dorsal part tiltedly holds in the palm width B
1and height H
1be 1.0 ~ 2.0m.
Described face skew back holder width B
2and height H
2be 1.0 ~ 2.0m.
The upright pile body of described circle is built by steel concrete.
A kind of bilateral haunched beam of the present invention retailing piles with round section construction method, concrete steps are as follows:
A, the circular horizontal haunched beam epimere pile body pore-forming of dorsal part: adopt Spiral digging machine dry method pore-forming, before creeping into, bury steel casing underground, creep into the oblique backing face of dorsal part design elevation and utilize the clear hole of Spiral digging machine augers;
Described casing adopts wall thickness 5 ~ 8mm steel plate to roll, and internal diameter is than the large 20cm of pile body diameter, height 2m;
B, the circular horizontal haunched beam Liang Shen of dorsal part cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, and circulation construction is not less than the upright pile body diameter of circle of 2 times to stretching into Side Slope crack face or the landslide slide surface degree of depth;
Described circulation construction sequence is as follows: every section of horizontal cutting depth should be controlled between 1.0 ~ 2.0m, lining cutting mode is adjusted flexibly according to driving stratum characteristic, in soft rock or scall, adopt spray concrete and combining anchor to carry out lining cutting, in other stratum, adopt spray concrete to carry out lining cutting, after the preceding paragraph lining construction completes, can carry out next section of excavation;
C, the circular horizontal haunched beam fabrication of reinforcing cage of dorsal part are installed: reinforcing bar adopts in usual manner Liang body cavern and welds, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and is bent in cavern;
Described welding step is as follows: between the main muscle of beam body and stirrup, adopt quincunx spot welding, between main muscle and main muscle, adopt overlap welding, fusion length is not less than 10 times of main muscle diameters;
Section pile body pore-forming between d, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam of face side: adopt Spiral digging machine dry method pore-forming, before creeping into, bury steel casing underground, creep into the design elevation of the horizontal haunched beam of face side bottom surface and utilize the clear hole of Spiral digging machine augers, circulation form of construction work is identical with step a;
E, the circular horizontal haunched beam Liang Shen of face side cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, circulation construction, the horizontal haunched beam Liang Shen of face side cavern length is not less than the upright pile body diameter of circle of 3 times, and circulation form of construction work is identical with step b;
F, the circular horizontal haunched beam fabrication of reinforcing cage of face side are installed: reinforcing bar adopts in usual manner Liang body cavern and welds, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, reinforcing cage welding manner is identical with step c;
The circular horizontal haunched beam hypomere pile body pore-forming of g, face side: adopt Spiral digging machine dry method pore-forming, bury steel casing before creeping into underground, creep into design elevation at the bottom of antislide pile stake and utilize the clear hole of Spiral digging machine augers, circulation work progress is identical with step a;
H, circular upright pile body fabrication of reinforcing cage is installed: pile body reinforcing cage adopts usual manner to weld outside stake hole, pile body stirrup is encrypted at the circular horizontal haunched beam of dorsal part and the upper and lower 2.0m scope of the circular horizontal haunched beam joint of face side, after completing, adopt crane that reinforcing bar cage hoisting is fixed to the stake hole of excavation, and at the circular horizontal haunched beam of dorsal part, the circular horizontal haunched beam of face side and circular upright pile body joint, by the circular horizontal haunched beam of dorsal part, the circular horizontal haunch beam main tendon of face side welds with the circular upright main muscle of pile body, reinforcing cage welding manner is identical with step c,
I, the circular upright pile body of antislide pile, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam concreting of face side: adopt pumping of concrete to build the circular upright pile body of antislide pile, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam of face side, every continous pouring 0.5～0.7m in casting process, adopt immersion vibrator vibration compacting 1 time, the distance of immersion vibrator tumbling barrel or conduit end opening and concreting face should be controlled between 1.0～3.0m.
The technological merit of the present invention's a kind of bilateral haunched beam retailing piles with round section and construction method thereof is as follows:
(1) in conjunction with antislide pile, be subject to the spatial distribution characteristic of force mode and bending and shearing, given full play to stake after and stake before the gravity pressure of Rock And Soil, the anti-skid function of the load-bearing of the anti-pressure ability of good ground and horizontal haunched beam, effectively improve pile body and be subject to force intensity, improved bending resistance and the shear resistance of antislide pile.
(2) simple, the anti-skid performance of anti-slide pile structure form strong, be easy to construction, be both applicable to high gradient slope or foundation pit supporting project, be also applicable to major landslip and administer engineering.
(3) citation form adopts the construction method of Spiral digging machine dry method pore-forming, has inherited its advantage, has that construction effect is high, mobility strong, safety factor advantages of higher.
Accompanying drawing explanation
Fig. 1 is the layout schematic diagram of a kind of bilateral haunched beam of the present invention retailing piles with round section in slope support engineering.
Fig. 2 is the layout schematic diagram of a kind of bilateral haunched beam of the present invention retailing piles with round section in landslide control engineering.
Fig. 3 is the cross-sectional view of a kind of bilateral haunched beam of the present invention retailing piles with round section.
Fig. 4 is the plan structure schematic diagram of a kind of bilateral haunched beam of the present invention retailing piles with round section.
Fig. 5 is the shearing distribution schematic diagram of a kind of bilateral haunched beam of the present invention retailing piles with round section operating principle.
Fig. 6 is the Bending moment distribution schematic diagram of a kind of bilateral haunched beam of the present invention retailing piles with round section operating principle.
In Fig. 7, a, b, c, d, e, f, g, h, i are the construction technology process schematic diagram of a kind of bilateral haunched beam of the present invention retailing piles with round section construction method.
In figure: the circular upright pile body of 1-, the circular horizontal haunched beam of 2-dorsal part, 3-dorsal part tiltedly holds in the palm, the circular horizontal haunched beam of 4-face side, the holder of 5-face skew back, Rock And Soil after 6-stake, 7-Side Slope crack face, the 8-slide surface that comes down, 9-good ground, D
1-circular upright pile body diameter of section, D
2the circular horizontal haunched beam diameter of section of-dorsal part, D
3the circular horizontal haunched beam diameter of section of-face side, H
1-dorsal part tiltedly holds in the palm height, H
2-face skew back holder height, B
1-dorsal part tiltedly holds in the palm width, B
2-face skew back holder width, I
1the circular horizontal haunched beam of-dorsal part is apart from Side Slope crack face or landslide slide surface and the circular uprightly distance of pile body dorsal part intersection point, I
2the circular horizontal haunched beam of-dorsal part passes through Side Slope crack face or landslide slide surface extend into the degree of depth in good ground, I
3the circular horizontal haunched beam of-face side is apart from Side Slope crack face or landslide slide surface and the circular uprightly distance of pile body face top-cross point, I
4the length of the circular horizontal haunched beam of-face side.
The specific embodiment
Shown in root Ju Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of bilateral haunched beam retailing piles with round section, comprising: circular upright pile body 1, the circular horizontal haunched beam 2 of dorsal part and the circular horizontal haunched beam 4 of face side; The circular horizontal haunched beam 2 of dorsal part is arranged on circular upright pile body 1 dorsal part, and the circular horizontal haunched beam 4 of face side is arranged on circular upright 1 side of pile body.
Also comprise tiltedly holder 3 of dorsal part, circular horizontal haunched beam 2 upsides of described dorsal part are with circular upright pile body 1 is vertical is connected, and circular horizontal haunched beam 2 downsides of dorsal part ask 3 to be connected with circular uprightly pile body 1 by dorsal part is oblique.
Also comprise face skew back holder 5, circular horizontal haunched beam 4 downsides of described face side are with circular upright pile body 1 is vertical is connected, and circular horizontal haunched beam 4 upsides of face side and circle uprightly pile body 1 are connected by face skew back holder 5.
The circular horizontal haunched beam 2 of described dorsal part is arranged on circular upright pile body 1 dorsal part, apart from the above distance I of intersection point of Side Slope crack face 7 or landslide slide surface 8 and circular upright pile body 1 dorsal part
1be not less than 2.0m; The circular horizontal haunched beam 2 of described dorsal part passes through Side Slope crack face 7 or landslide slide surface 8 extend into the degree of depth I in good ground 9
2be not less than the upright pile body diameter D of circle of 2 times
1.
The circular horizontal haunched beam 4 of described face side is arranged on circular upright 1 side of pile body, apart from the following distance I of intersection point of Side Slope crack face 7 or landslide slide surface 8 and circular upright 1 side of pile body
3be not less than 2.0m.
Circular upright pile body 1 diameter of section D
1, the circular horizontal haunched beam 2 diameter of section D of dorsal part
2and the circular horizontal haunched beam 4 diameter of section D of face side
3identical, D
1=D
2=D
3=1.5 ~ 2.0m.
The circular horizontal haunched beam 4 length I of described face side
4be not less than the upright pile body diameter D of circle of 3 times
1.
Described dorsal part is holder 3 width B tiltedly
1and height H
1be 1.0 ~ 2.0m.
Described face skew back holder 5 width B
2and height H
2be 1.0 ~ 2.0m.
The upright pile body 1 of described circle is built by steel concrete.
Root Ju Fig. 5, shown in Fig. 6, the operating principle of a kind of bilateral haunched beam of the present invention retailing piles with round section is: by horizontal haunched beam together with arranging respectively with face side certain depth place at the upright pile body dorsal part of circle, and the circular horizontal haunched beam of dorsal part is passed through to potential slide surface extend in good ground, the circular horizontal haunched beam of face side is placed in the good ground below potential slide surface, to reach the object that strengthens the anti-skid performance of antislide pile, during antislide pile work, the gravity pressure that the circular horizontal haunched beam 2 of dorsal part provides by Rock And Soil after stake 6, give full play to the anti-skid function of its load-bearing, Thrust of Landslide or side slope soil pressure that circular upright pile body 1 is born have effectively been reduced, when the circular horizontal haunched beam 2 of dorsal part and circular upright pile body 1 cooperative bearing, after stake, Rock And Soil 6 meetings produce an opposing moment of flexure contrary with Thrust of Landslide or side slope soil pressure action moment at circular horizontal haunched beam 2 upsides of dorsal part, when the circular horizontal haunched beam 4 of face side and circular upright pile body 1 cooperative bearing, good ground 9 can be in an opposing moment of flexure contrary with Thrust of Landslide or side slope soil pressure action moment of the circular horizontal haunched beam 4 downsides generations of face side, the circular horizontal haunched beam 2 of dorsal part and the circular horizontal haunched beam 4 of face side self are also shared Partial Shear simultaneously, thereby bending resistance and the shear resistance of antislide pile have been improved, antislide pile fixed section length, sectional dimension and quantity of reinforcement have been reduced, reduced construction costs, utilize the gravity pressure of the front Rock And Soil of stake, the overall structure that the anti-pressure ability of good ground and the back of the body, the circular horizontal haunched beam of face side and pile body form, effectively improve pile body and be subject to force intensity, improve bending resistance and the shear resistance of antislide pile, strengthened the regulation effect of antislide pile
Shown in root Ju Fig. 7, a kind of bilateral haunched beam retailing piles with round section construction method, concrete steps are as follows:
A, the circular horizontal haunched beam epimere pile body pore-forming of dorsal part: adopt Spiral digging machine dry method pore-forming, before creeping into, bury steel casing underground, creep into the oblique backing face of dorsal part design elevation and utilize the clear hole of Spiral digging machine augers;
Described casing adopts wall thickness 5 ~ 8mm steel plate to roll, and internal diameter is than the large 20cm of pile body diameter, height 2m;
B, the circular horizontal haunched beam Liang Shen of dorsal part cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, and circulation construction is not less than the upright pile body diameter of circle of 2 times to stretching into Side Slope crack face or the landslide slide surface degree of depth;
Described circulation construction sequence is as follows: every section of horizontal cutting depth should be controlled between 1.0 ~ 2.0m, lining cutting mode is adjusted flexibly according to driving stratum characteristic, in soft rock or scall, adopt spray concrete and combining anchor to carry out lining cutting, in other stratum, adopt spray concrete to carry out lining cutting, after the preceding paragraph lining construction completes, can carry out next section of excavation;
C, the circular horizontal haunched beam fabrication of reinforcing cage of dorsal part are installed: reinforcing bar adopts in usual manner Liang body cavern and welds, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, so that the horizontal haunch beam main tendon of later stage dorsal part and the main muscle of pile body weld, do not affect pile body pore-forming and reinforcing cage construction simultaneously;
Described welding step is as follows: between the main muscle of beam body and stirrup, adopt quincunx spot welding, between main muscle and main muscle, adopt overlap welding, fusion length is not less than 10 times of main muscle diameters;
Section pile body pore-forming between d, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam of face side: adopt Spiral digging machine dry method pore-forming, before creeping into, bury steel casing underground, creep into the design elevation of the horizontal haunched beam of face side bottom surface and utilize the clear hole of Spiral digging machine augers, circulation form of construction work is identical with step a;
E, the circular horizontal haunched beam Liang Shen of face side cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, circulation construction, the horizontal haunched beam Liang Shen of face side cavern length is not less than the upright pile body diameter of circle of 3 times, and circulation form of construction work is identical with step b;
F, the circular horizontal haunched beam fabrication of reinforcing cage of face side are installed: reinforcing bar adopts in usual manner Liang body cavern and welds, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, so that the horizontal haunch beam main tendon of later stage face side and the main muscle of pile body weld, do not affect pile body pore-forming and reinforcing cage construction, reinforcing cage welding manner is identical with step c simultaneously;
The circular horizontal haunched beam hypomere pile body pore-forming of g, face side: adopt Spiral digging machine dry method pore-forming, bury steel casing before creeping into underground, creep into design elevation at the bottom of antislide pile stake and utilize the clear hole of Spiral digging machine augers, circulation work progress is identical with step a;
H, circular upright pile body fabrication of reinforcing cage is installed: pile body reinforcing cage adopts usual manner to weld outside stake hole, pile body stirrup is encrypted at the circular horizontal haunched beam of dorsal part and the upper and lower 2.0m scope of the circular horizontal haunched beam joint of face side, after completing, adopt crane that reinforcing bar cage hoisting is fixed to the stake hole of excavation, and at the circular horizontal haunched beam of dorsal part, the circular horizontal haunched beam of face side and circular upright pile body joint, by the circular horizontal haunched beam of dorsal part, the circular horizontal haunch beam main tendon of face side welds with the circular upright main muscle of pile body, reinforcing cage welding manner is identical with step c,
I, the circular upright pile body of antislide pile, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam concreting of face side: adopt pumping of concrete to build the circular upright pile body of antislide pile, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam of face side, and carry out maintenance, every continous pouring 0.5～0.7m in casting process, adopt immersion vibrator vibration compacting 1 time, the distance of immersion vibrator tumbling barrel or conduit end opening and concreting face should be controlled between 1.0～3.0m.
Claims (10)
1. a bilateral haunched beam retailing piles with round section, is characterized in that: comprising: circular upright pile body (1), the circular horizontal haunched beam (2) of dorsal part and the circular horizontal haunched beam (4) of face side; The circular horizontal haunched beam of dorsal part (2) is arranged on circular upright pile body (1) dorsal part, and the circular horizontal haunched beam of face side (4) is arranged on circular upright pile body (1) face side.
2. a kind of bilateral haunched beam retailing piles with round section according to claim 1, it is characterized in that: also comprise that dorsal part tiltedly holds in the palm (3), circular horizontal haunched beam (2) upside of described dorsal part and circular upright vertical connection of pile body (1), circular horizontal haunched beam (2) downside of dorsal part tiltedly asks (3) to be connected with circular upright pile body (1) by dorsal part.
3. a kind of bilateral haunched beam retailing piles with round section according to claim 1 and 2, it is characterized in that: also comprise face skew back holder (5), circular horizontal haunched beam (4) downside of described face side and circular upright vertical connection of pile body (1), circular horizontal haunched beam (4) upside of face side is connected by face skew back holder (5) with circular upright pile body (1).
4. a kind of bilateral haunched beam retailing piles with round section according to claim 1, it is characterized in that: the described circular horizontal haunched beam of dorsal part (2) is arranged on circular upright pile body (1) dorsal part, apart from the above distance I of intersection point of Side Slope crack face (7) or landslide slide surface (8) and circular upright pile body (1) dorsal part
1be not less than 2.0m; The described circular horizontal haunched beam of dorsal part (2) passes through Side Slope crack face (7) or landslide slide surface (8) extend into the degree of depth I in good ground (9)
2be not less than the upright pile body of circle (1) the diameter D of 2 times
1.
5. a kind of bilateral haunched beam retailing piles with round section according to claim 1, it is characterized in that: the described circular horizontal haunched beam of face side (4) is arranged on circular upright pile body (1) face side, apart from the following distance I of intersection point of Side Slope crack face (7) or landslide slide surface (8) and circular upright pile body (1) face side
3be not less than 2.0m.
6. a kind of bilateral haunched beam retailing piles with round section according to claim 1, is characterized in that: circular upright pile body (1) diameter of section D
1, circular horizontal haunched beam (2) the diameter of section D of dorsal part
2and circular horizontal haunched beam (4) the diameter of section D of face side
3identical, D
1=D
2=D
3=1.5 ~ 2.0m.
7. a kind of bilateral haunched beam retailing piles with round section according to claim 1, is characterized in that: circular horizontal haunched beam (4) the length I of described face side
4be not less than the upright pile body of circle (1) the diameter D of 3 times
1.
8. a kind of bilateral haunched beam retailing piles with round section according to claim 2, is characterized in that: described dorsal part tiltedly holds in the palm (3) width B
1and height H
1be 1.0 ~ 2.0m.
9. a kind of bilateral haunched beam retailing piles with round section according to claim 3, is characterized in that: described face skew back holder (5) width B
2and height H
2be 1.0 ~ 2.0m.
10. a bilateral haunched beam retailing piles with round section construction method, is characterized in that: concrete steps are as follows:
A, the circular horizontal haunched beam epimere pile body pore-forming of dorsal part: adopt Spiral digging machine dry method pore-forming, before creeping into, bury steel casing underground, creep into the oblique backing face of dorsal part design elevation and utilize the clear hole of Spiral digging machine augers;
Described casing adopts wall thickness 5 ~ 8mm steel plate to roll, and internal diameter is than the large 20cm of pile body diameter, height 2m;
B, the circular horizontal haunched beam Liang Shen of dorsal part cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, and circulation construction is not less than the upright pile body diameter of circle of 2 times to stretching into Side Slope crack face or the landslide slide surface degree of depth;
Described circulation construction sequence is as follows: every section of horizontal cutting depth is controlled between 1.0 ~ 2.0m, lining cutting mode is adjusted flexibly according to driving stratum characteristic, in soft rock or scall, adopt spray concrete and combining anchor to carry out lining cutting, in other stratum, adopt spray concrete to carry out lining cutting, after the preceding paragraph lining construction completes, can carry out next section of excavation;
C, the circular horizontal haunched beam fabrication of reinforcing cage of dorsal part are installed: reinforcing bar adopts in usual manner Liang body cavern and welds, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and is bent in cavern;
Described welding step is as follows: between the main muscle of beam body and stirrup, adopt quincunx spot welding, between main muscle and main muscle, adopt overlap welding, fusion length is not less than 10 times of main muscle diameters;
Section pile body pore-forming between d, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam of face side: adopt Spiral digging machine dry method pore-forming, before creeping into, bury steel casing underground, creep into the design elevation of the horizontal haunched beam of face side bottom surface and utilize the clear hole of Spiral digging machine augers, circulation form of construction work is identical with step a;
E, the circular horizontal haunched beam Liang Shen of face side cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, circulation construction, the horizontal haunched beam Liang Shen of face side cavern length is not less than the upright pile body diameter of circle of 3 times, and circulation form of construction work is identical with step b;
F, the circular horizontal haunched beam fabrication of reinforcing cage of face side are installed: reinforcing bar adopts in usual manner Liang body cavern and welds, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, reinforcing cage welding manner is identical with step c;
The circular horizontal haunched beam hypomere pile body pore-forming of g, face side: adopt Spiral digging machine dry method pore-forming, bury steel casing before creeping into underground, creep into design elevation at the bottom of antislide pile stake and utilize the clear hole of Spiral digging machine augers, circulation work progress is identical with step a;
H, circular upright pile body fabrication of reinforcing cage is installed: pile body reinforcing cage adopts usual manner to weld outside stake hole, pile body stirrup is encrypted at the circular horizontal haunched beam of dorsal part and the upper and lower 2.0m scope of the circular horizontal haunched beam joint of face side, after completing, adopt crane that reinforcing bar cage hoisting is fixed to the stake hole of excavation, and at the circular horizontal haunched beam of dorsal part, the circular horizontal haunched beam of face side and circular upright pile body joint, by the circular horizontal haunched beam of dorsal part, the circular horizontal haunch beam main tendon of face side welds with the circular upright main muscle of pile body, reinforcing cage welding manner is identical with step c,
I, the circular upright pile body of antislide pile, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam concreting of face side: adopt pumping of concrete to build the circular upright pile body of antislide pile, the circular horizontal haunched beam of dorsal part and the circular horizontal haunched beam of face side, every continous pouring 0.5～0.7m in casting process, adopt immersion vibrator vibration compacting 1 time, the distance of immersion vibrator tumbling barrel or conduit end opening and concreting face is controlled between 1.0～3.0m.
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| CN108330986A (en) * | 2018-04-11 | 2018-07-27 | 王凯 | Back-pressure de-bowed type pile slab supporting structure and construction method after stake |
| CN110106888A (en) * | 2019-04-02 | 2019-08-09 | 刘侨 | It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method |
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