CN214695636U - Novel foundation pit inclined pile supporting structure - Google Patents
Novel foundation pit inclined pile supporting structure Download PDFInfo
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- CN214695636U CN214695636U CN202023314409.0U CN202023314409U CN214695636U CN 214695636 U CN214695636 U CN 214695636U CN 202023314409 U CN202023314409 U CN 202023314409U CN 214695636 U CN214695636 U CN 214695636U
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Abstract
The utility model discloses a novel foundation pit inclined pile supporting structure, which belongs to the technical field of supporting of constructional engineering, and comprises a crown beam, a fender pile, a connecting beam, an anchor rod, an anchoring body, a waist beam, an inclined strut, a connecting member, an anchoring section, a reinforced cushion layer and a consolidation body; the anchoring section comprises grouting holes and a bag; the anchoring body is bonded in the consolidation body, the upper end of the anchor rod is connected with the connecting beam through a bolt, and the connecting beam is connected with the steel bar in the crown beam; the fender pile and the crown beam are of an integral structure, the waist beam is anchored on the fender pile and is connected with the inclined supporting rod in a welding mode through the connecting component, the inclined supporting rod is connected with the anchoring section through the flange, the anchoring section is provided with a grouting hole, the outer surface of the anchoring section is fixed with a bag through a clamp, the anchoring section is bonded in the consolidation body, and the reinforced cushion layer is located at the bottom of the foundation pit. The utility model discloses a foundation ditch retaining structure can increase the depth of strutting to tens meters by within original five meters to diagonal brace and even roof beam all can retrieve reuse, save the cost.
Description
Technical Field
The utility model relates to a building engineering struts technical field, in particular to novel foundation ditch batter pile supporting construction.
Background
For foundation pit engineering in a soft soil area within an excavation depth range of 5m, the enclosing structure form used in the existing supporting technology generally adopts the technologies of a cement soil gravity type enclosing wall, a section steel cement soil stirring wall, slope-laying excavation, inclined cast bracing supporting and the like.
The soil cement gravity type enclosure wall is characterized in that the soil retaining structure consists of 'grid-shaped' soil cement piles which are continuously lapped in longitudinal and transverse rows, no support is arranged in a common pit, the soil is conveniently and quickly dug, and the soil retaining and water stopping dual functions are realized, but the displacement control capability is weaker, the construction quality is difficult to control, and the economy is general.
The section steel cement soil mixing wall is a composite soil-retaining and water-proof structure formed by inserting section steel into continuously overlapped triaxial cement soil piles. The soil property application range is wide, the influence on the surrounding environment is small, the anti-seepage performance is good, the soil layer application range is wide, and the like. But the construction cost per meter of foundation pit within 5m is higher, the construction requirement is higher, and the pile forming quality of the cement-soil pile is difficult to control.
The slope-caving excavation is a foundation pit excavation mode of reserving and arranging an inclined soil slope, has the advantages of short construction period and low manufacturing cost, and has the defects of high slope-caving ratio requirement, requirement for meeting the requirements of slope stability and upper opening width at the same time and great influence on the surrounding environment.
The inclined cast support is characterized in that a central island is arranged at the bottom of a foundation pit, a top beam is connected with the central island by using rod pieces such as steel pipes and profile steels, and a soil body below the rod pieces is not excavated temporarily in the excavation process.
To sum up, the mode of strutting of shallow foundation ditch is still not perfect to two-layer basement has all been built to present most building, has surpassed the scope on shallow basis basically, and foretell scheme is then no longer suitable for, nevertheless adopts the mode of strutting that the deep foundation ditch is commonly used, and not only the cost is high, and is also great to the influence of all ring edge borders, consequently, the utility model provides a novel foundation ditch batter pile supporting construction on this basis and solves above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem that exists among the prior art, the utility model provides a novel foundation ditch batter pile supporting construction has overcome the not enough of prior art. The supporting system in the foundation pit is arranged, the consolidation body, the inclined strut, the fender post and the reinforced cushion layer form a stable mechanical triangular system, and the bag is arranged in the anchoring section, so that the supporting capability of the inclined throwing strut is improved; the foundation pit outer supporting system is arranged, the consolidation body and the anchoring body form a pulling-resistant structure, the pulling resistance is decomposed into horizontal tensile resistance by changing the inclination angle of the consolidation body, and the problem of large pile end displacement of the fender pile is solved well; adopt the utility model discloses a foundation ditch enclosure structure can increase the depth of strutting to tens meters by within original five meters to diagonal brace and even roof beam all can retrieve reuse, save the cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a novel foundation ditch batter pile supporting construction which characterized in that: the device comprises a crown beam, a fender pile, a coupling beam, an anchor rod, an anchoring body, a waist beam, an inclined stay bar, a connecting member, an anchoring section, a reinforced cushion layer and a consolidation body; wherein the anchoring section comprises a grouting hole and a bag; the fender pile divides a soil body into a foundation pit side and a foundation pit outer side, a connecting beam, an anchor rod, an anchoring body and a consolidation body are arranged on the foundation pit outer side, the anchoring body is bonded in the consolidation body, the lower end of the anchor rod is welded at the lower end of the anchoring body, the upper end of the anchor rod is connected with the connecting beam through a bolt, and the connecting beam is connected with a steel bar in a crown beam; the foundation pit is characterized in that a top beam, a waist beam, an inclined stay bar, a connecting component, an anchoring section, a reinforced cushion layer and a consolidation body are arranged on the side of the foundation pit, the fender pile and the top beam are of an integral structure, the waist beam is anchored on the fender pile, the waist beam is connected with the connecting component through welding, the connecting component is connected with the inclined stay bar through welding, the inclined stay bar is connected with the anchoring section through a flange, a grouting hole is formed in the anchoring section, a bag is fixed on the outer surface of the anchoring section through a clamp, the anchoring section is bonded in the consolidation body, and the reinforced cushion layer is located at the bottom of the foundation pit.
Preferably, the anchor body is a precast concrete member, the anchor body is any one of a tubular pile, a hollow square pile and a bamboo joint pile, the lower end of the anchor body is sealed with a steel plate, the upper end of the anchor body is sealed with a steel plate, and an anchor rod hole is reserved.
Preferably, the diameter of the consolidation body is 600 mm-1000 mm, and is smaller than the minimum width of the soil body between adjacent fender piles.
Preferably, the stock is the ribbed steel bar, and the quantity of reinforcing bar is no less than two, and the part of reinforcing bar outside the anchor body wraps up there is the isolation layer, and the isolation layer bonds with the reinforcing bar and does not produce the bonding with the anchor body, and the isolation layer is anchored the body in advance and can produce relative slip. Preferably, the connecting beam is one or a combination of more than one of double-spliced I-shaped steel, H-shaped steel, steel pipes and reinforced concrete.
Preferably, the wale is two-layer about, and the wale is located 1/3~2/3 of distance between foundation ditch bottom surface and the hat roof beam, and the interval between two-layer wale is 2~4 times of anchor section diameter, the connecting element is the ring shape, and the inner ring and the anchor section external diameter phase-match of connecting element, the outer loop diameter of connecting element equals the interval between two-layer wale, and the thickness of connecting element is 10mm ~20 mm.
Preferably, the inclined supporting rod is a circular steel pipe, the inclined supporting rod is at least one section, the diameter of the inclined supporting rod is 1/3-2/3 of the diameter of a foundation pit side consolidation body, one end, connected with the anchoring section, of the inclined supporting rod is subjected to bottom sealing, a grouting pipe hole is reserved, the diameter of the grouting pipe hole is 2-3 mm larger than that of the grouting pipe, and the grouting pipe is installed inside the inclined supporting rod.
Preferably, the anchor section is circular steel pipe, and the diameter of anchor section is the same with the diameter of bracing strut, and the axis coincidence of both, and the slip casting hole sets up the intermediate position at the anchor section, and the diameter in slip casting hole is 15mm ~30 mm.
The utility model discloses the beneficial technological effect who brings:
the supporting system in the foundation pit is arranged, the consolidation body, the inclined strut, the fender post and the reinforced cushion layer form a stable mechanical triangular system, and the bag is arranged in the anchoring section, so that the supporting capability of the inclined throwing strut is improved; the foundation pit outer supporting system is arranged, the consolidation body and the anchoring body form a pulling-resistant structure, the pulling resistance is decomposed into horizontal tensile resistance by changing the inclination angle of the consolidation body, and the problem of large pile end displacement of the fender pile is solved well; adopt the utility model discloses a foundation ditch enclosure structure can increase the depth of strutting to tens meters by within original five meters to diagonal brace and even roof beam all can retrieve reuse, save the cost.
Drawings
Fig. 1 is the utility model relates to a novel foundation ditch batter pile supporting construction's schematic structure diagram.
Fig. 2 is the utility model relates to a novel foundation ditch batter pile supporting construction's structural section schematic diagram.
Wherein, 1-crown beam, 2-fender pile, 3-coupling beam, 4-anchor rod, 5-anchoring body, 6-waist beam, 7-diagonal bar, 8-connecting member, 9-anchoring section, 10-reinforced cushion layer, 11-consolidation body, 91-grouting hole and 92-bag.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:
example 1:
as shown in figures 1-2, a novel foundation pit batter pile supporting construction, its characterized in that: the system comprises a top beam 1, a fender post 2, a coupling beam 3, an anchor rod 4, an anchoring body 5, a waist beam 6, an inclined stay bar 7, a connecting member 8, an anchoring section 9, a reinforced cushion layer 10 and a consolidation body 11; wherein the anchoring section 9 comprises grouting holes 91, a pocket 92; the fender pile 2 divides a soil body into a foundation pit side and a foundation pit outer side, a connecting beam 3, an anchor rod 4, an anchoring body 5 and a consolidation body 11 are arranged on the foundation pit outer side, the anchoring body 5 is bonded in the consolidation body 11, the lower end of the anchor rod 4 is welded at the lower end of the anchoring body 5, the upper end of the anchor rod 4 is connected with the connecting beam 3 through a bolt, and the connecting beam 3 is connected with a steel bar in the crown beam 1; the foundation pit side is provided with a crown beam 1, a waist beam 6, an inclined stay bar 7, a connecting member 8, an anchoring section 9, a reinforced cushion layer 10 and a consolidation body 11, the fender pile 2 and the crown beam 1 are of an integral structure, the waist beam 6 is anchored on the fender pile 2, the waist beam 6 is connected with the connecting member 8 through welding, the connecting member 8 is connected with the inclined stay bar 7 through welding, the inclined stay bar 7 is connected with the anchoring section 9 through a flange, the anchoring section 9 is provided with a grouting hole 91, the outer surface of the anchoring section 9 is fixed with a bag 92 through a hoop, the anchoring section 9 is bonded in the consolidation body 11, and the reinforced cushion layer 10 is positioned at the bottom of the foundation pit.
Preferably, anchor 5 is precast concrete component, and anchor 5 is any one of tubular pile, hollow square pile, bamboo joint stake, and anchor 5's lower extreme is with steel sheet back cover, and anchor 5's upper end is with steel sheet back cover, and reserve 4 holes of stock.
Preferably, the diameter of the consolidation body 11 is 600 mm-1000 mm, and is smaller than the minimum width of the soil body between the adjacent fender piles 2.
Preferably, stock 4 is the ribbed reinforcing bar, and the quantity of reinforcing bar is no less than two, and the part of reinforcing bar outside anchor body 5 wraps up there is the isolation layer, and the isolation layer bonds with the reinforcing bar and does not produce with the anchor body and bond, and the isolation layer is anchored the body in advance and can produce relative slip.
Preferably, the connecting beam 3 is one or a combination of more than one of double-spliced I-shaped steel, H-shaped steel, steel pipes and reinforced concrete.
Preferably, the wale 6 is divided into an upper layer and a lower layer, the wale 6 is located between 1/3-2/3 of the distance between the bottom surface of the foundation pit and the crown beam 1, the distance between the two layers of wales 6 is 2-4 times of the diameter of the anchoring section 9, the connecting member 8 is in a circular ring shape, the inner ring of the connecting member 8 is matched with the outer diameter of the anchoring section 9, the diameter of the outer ring of the connecting member 8 is equal to the distance between the two layers of wales 6, and the thickness of the connecting member 8 is 10-20 mm.
Preferably, the inclined supporting rod 7 is a circular steel pipe, the inclined supporting rod 7 is at least one section, the diameter of the inclined supporting rod 7 is 1/3-2/3 of the diameter of the foundation pit side solidification body 11, one end, connected with the anchoring section 9, of the inclined supporting rod 7 is subjected to bottom sealing, a grouting pipe hole is reserved, the diameter of the grouting pipe hole is 2-3 mm larger than that of the grouting pipe, and the grouting pipe is installed inside the inclined supporting rod 7.
Preferably, the anchoring section 9 is a circular steel pipe, the diameter of the anchoring section 9 is the same as that of the diagonal brace 7, the axes of the anchoring section and the diagonal brace coincide, the grouting hole 91 is formed in the middle of the anchoring section 9, and the diameter of the grouting hole 91 is 15 mm-30 mm.
Example 2:
as shown in figures 1-2, adopt a novel foundation ditch batter pile supporting construction carry out following construction:
the method comprises the following steps: preparation for construction
Before construction, preparing two circular iron plates with the same diameter as the anchoring body 5, welding one end of the anchor rod 4 at the center of the circular iron plates, inserting one end of the anchor rod 4, which is not welded with the circular iron plates, into a cavity of the anchoring body 5 and penetrating the end through the cavity of the anchoring body 5 to ensure that the central axis of the anchor rod 4 is coincided with the central axis of the anchoring body 5, plugging the lower end part of the anchoring body 5 by adopting the circular iron plates welded with the anchor rod 4, grouting by adopting one of concrete, mortar and cement paste, performing grout supplement after a filling material in the cavity is initially set, and then plugging the upper end of the anchoring body 5 by adopting the circular iron plates; coating an isolation layer on the part of the anchor rod 4 outside the anchoring body 5, and fixing the bag 92 on the outer surface of the anchoring section 9 through a hoop;
step two: the solidification body 11 is stirred and the anchoring body 5 is implanted
Constructing an outer consolidation body 11 of a foundation pit according to a design angle by adopting one of a high-pressure jet grouting pile machine, an anchor rod drilling machine and an inclined pile stirring drilling machine, implanting an anchoring body 5 with an anchor rod 4 into the lower end part of the consolidation body 11 before the consolidation body 11 is initially set, ensuring that the central axis of the anchoring body 5 is superposed with the central line of the consolidation body 11, and ensuring that the lowest end of the consolidation body 11 and the lowest end of the anchoring body 5 are in the same plane;
step three: connecting coupling beam 3 and crown beam 1
Connecting the top end of an anchor rod 4 with a connecting beam 3 through a bolt, connecting the other end of the connecting beam 3 with a steel bar in a crown beam 1, fixing a crown beam 1 template, and pouring concrete in the template to form the crown beam 1;
step four: concretion body 11 in construction foundation pit
Determining the inclination angle of a consolidation body 11 in the foundation pit, the total length of the consolidation body 11 and the length extending below the bottom of the foundation pit according to design, adopting a jet grouting method for construction, determining the position of a jet grouting pile machine on the ground outside the foundation pit according to the inclination angle, the length of a fender pile 2 and the position of a waist beam 6, and during construction, sequentially penetrating a drill rod through a soil body outside the foundation pit, a soil body between the fender piles 2 and a soil body in the foundation pit to reach the designed depth;
step five: implanted anchoring section 9 and diagonal brace 7
Connecting the bound anchoring section 9 with the diagonal brace 7, and implanting the inclined brace to a designed depth by adopting pile implanting equipment;
step six: grouting
Calculating the theoretical volume of the grout filled in the bag 92 according to the diameter and the length of the bag 92, preparing the cement grout, pumping the cement grout into the anchoring section 9 along a grouting pipe in the diagonal brace 7 through a grouting pump, wherein the pumping pressure is 0.5-2.0 MPa, the pumping flow is 50-150L/min, the grout enters the bag 92 through a grouting hole 91 of the anchoring section 9, the volume of the grout in the bag 92 is calculated through the pumping flow and time, when the grouting amount reaches the theoretical volume, the pumping pressure and the pumping flow are adjusted to be minimum values, grouting is continued for 0.5-1.0 min, and grouting is stopped;
step seven: excavating
After the foundation pit side consolidation body 11 and the foundation pit outer side consolidation body 11 reach the design strength and the crown beam 1 is maintained to the design strength, earth excavation is started, and excavation is stopped when the excavation depth reaches the position 0.5 m-1.0 m below the design waist beam 6;
step eight: construction wale 6 and connecting member 8
Breaking the part of a consolidation body 11 in the foundation pit, which is close to a fender post 2, so that an inclined strut 7 in the consolidation body 11 is exposed, anchoring a waist beam 6 at the position where the inclined strut 7 and the fender post 2 are intersected, wherein two layers of waist beams 6 are contacted with the inclined strut 7, and welding a connecting member 8 at the position of the inclined strut 7 contacted with the waist beam 6, so that the waist beam 6, the connecting member 8 and the inclined strut 7 form a whole;
step nine: continue to excavate
Continuing to excavate to the depth of the bottom surface of the designed foundation pit, and removing the concretion body 11 above the bottom surface of the designed foundation pit in the excavation process to expose the inclined stay bar 7;
step ten: construction reinforced cushion layer 10
A concrete cushion layer is laid on the bottom surface of the foundation pit, the grade of concrete is not less than C25, the thickness of the cushion layer is 5 cm-15 cm, and a reinforcing mesh is arranged inside the cushion layer.
The utility model relates to a novel foundation pit inclined pile supporting structure, through setting up the supporting system in the foundation pit, will consolidate body, diagonal brace, fender pile and add the muscle bed course and make up stable mechanics triangle-shaped system, and set up the bag in the anchor section, increased the supporting ability of the oblique throwing brace, simultaneously, the diagonal brace passes the fender pile intermediate position, reduced the length of diagonal brace, namely increased the stability of diagonal brace, in addition, through the support of diagonal brace, the amount of deflection of fender pile is obviously reduced; the foundation pit outer supporting system is arranged, the consolidation body and the anchoring body form a pulling-resistant structure, the pulling resistance is decomposed into horizontal tensile resistance by changing the inclination angle of the consolidation body, and the problem of large pile end displacement of the fender pile is solved well; adopt the utility model discloses a foundation ditch enclosure structure can increase the depth of strutting to tens meters by within original five meters to diagonal brace and even roof beam all can retrieve reuse, save the cost.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a novel foundation ditch batter pile supporting construction which characterized in that: the device comprises a crown beam, a fender pile, a coupling beam, an anchor rod, an anchoring body, a waist beam, an inclined stay bar, a connecting member, an anchoring section, a reinforced cushion layer and a consolidation body; wherein the anchoring section comprises a grouting hole and a bag; the fender pile divides a soil body into a foundation pit side and a foundation pit outer side, a connecting beam, an anchor rod, an anchoring body and a consolidation body are arranged on the foundation pit outer side, the anchoring body is bonded in the consolidation body, the lower end of the anchor rod is welded at the lower end of the anchoring body, the upper end of the anchor rod is connected with the connecting beam through a bolt, and the connecting beam is connected with a steel bar in a crown beam; the foundation pit is characterized in that a top beam, a waist beam, an inclined stay bar, a connecting component, an anchoring section, a reinforced cushion layer and a consolidation body are arranged on the side of the foundation pit, the fender pile and the top beam are of an integral structure, the waist beam is anchored on the fender pile, the waist beam is connected with the connecting component through welding, the connecting component is connected with the inclined stay bar through welding, the inclined stay bar is connected with the anchoring section through a flange, a grouting hole is formed in the anchoring section, a bag is fixed on the outer surface of the anchoring section through a clamp, the anchoring section is bonded in the consolidation body, and the reinforced cushion layer is located at the bottom of the foundation pit.
2. The novel foundation pit batter pile supporting structure according to claim 1, wherein the anchoring body is a precast concrete member, the anchoring body is any one of a tubular pile, a hollow square pile and a bamboo joint pile, the lower end of the anchoring body is covered with a steel plate, the upper end of the anchoring body is covered with a steel plate, and an anchor rod hole is reserved.
3. The novel foundation pit inclined pile supporting structure as claimed in claim 1, wherein the diameter of the consolidation body is 600 mm-1000 mm, and is smaller than the minimum width of soil between adjacent fender piles.
4. The novel foundation pit inclined pile supporting structure as claimed in claim 1, wherein the anchor rods are ribbed steel bars, the number of the steel bars is not less than two, the portions, outside the anchoring bodies, of the steel bars are wrapped with isolating layers, the isolating layers are bonded with the steel bars and are not bonded with the anchoring bodies, and the isolating layers can produce relative sliding in the pre-anchoring bodies.
5. The novel foundation pit inclined pile supporting structure according to claim 1, wherein the connecting beam is one or a combination of more than one of double-spliced I-shaped steel, H-shaped steel, steel pipes and reinforced concrete.
6. The novel foundation pit inclined pile supporting structure as claimed in claim 1, wherein the waist beams are arranged in an upper layer and a lower layer, the waist beams are located between 1/3-2/3 of the distance between the bottom surface of the foundation pit and the top beam, the distance between the two layers of waist beams is 2-4 times of the diameter of the anchoring section, the connecting member is in a circular ring shape, the inner ring of the connecting member is matched with the outer diameter of the anchoring section, the diameter of the outer ring of the connecting member is equal to the distance between the two layers of waist beams, and the thickness of the connecting member is 10-20 mm.
7. The novel foundation pit inclined pile supporting structure according to claim 1, wherein the inclined supporting rod is a circular steel pipe, the inclined supporting rod is at least one section, the diameter of the inclined supporting rod is 1/3-2/3 of the diameter of a foundation pit side consolidation body, one end of the inclined supporting rod, which is connected with the anchoring section, is subjected to bottom sealing, a grouting pipe hole is reserved, the diameter of the grouting pipe hole is 2 mm-3 mm larger than that of the grouting pipe, and the grouting pipe is arranged in the inclined supporting rod.
8. The novel foundation pit inclined pile supporting structure according to claim 1, wherein the anchoring section is a circular steel pipe, the diameter of the anchoring section is the same as that of the inclined strut, the axes of the anchoring section and the inclined strut are coincident, the grouting hole is formed in the middle of the anchoring section, and the diameter of the grouting hole is 15 mm-30 mm.
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| CN202023314409.0U CN214695636U (en) | 2020-12-31 | 2020-12-31 | Novel foundation pit inclined pile supporting structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087993A (en) * | 2021-11-27 | 2022-02-25 | 侯剑 | Dynamic monitoring construction method for in-situ foundation pit inclined support counterforce device |
| CN114855811A (en) * | 2022-06-01 | 2022-08-05 | 上海市城市建设设计研究总院（集团）有限公司 | Three-row pile-combination supporting structure and corresponding foundation pit construction method |
-
2020
- 2020-12-31 CN CN202023314409.0U patent/CN214695636U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087993A (en) * | 2021-11-27 | 2022-02-25 | 侯剑 | Dynamic monitoring construction method for in-situ foundation pit inclined support counterforce device |
| CN114087993B (en) * | 2021-11-27 | 2023-08-04 | 侯剑 | Dynamic monitoring construction method of in-situ foundation pit inclined support counterforce device |
| CN114855811A (en) * | 2022-06-01 | 2022-08-05 | 上海市城市建设设计研究总院（集团）有限公司 | Three-row pile-combination supporting structure and corresponding foundation pit construction method |
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