CN114991168A - Supporting pile reinforcing structure positioned outside foundation pit and construction method thereof - Google Patents

Abstract

The invention discloses a support pile reinforcing structure positioned outside a foundation pit and a construction method thereof. This additional strengthening still includes the anchor pile that is located the foundation ditch outside including enclosing the fender at the foundation ditch lateral wall, is connected with between the top of support pile and guan liang, and the top of anchor pile is connected with guan liang through strengthening the armpit. The construction method comprises the steps of firstly completing construction of supporting piles and anchoring piles, then carrying out reinforcement of the crown beam and the reinforcing armpits, and simultaneously pouring the crown beam and the reinforcing armpits into a whole. The invention has the beneficial effects that: the structural design position of the anchoring pile ensures the larger top deformation resistance, the same supporting pile structure can be adopted, the construction is simple and convenient, and the field implementation is easy; the reinforced armpit structure can adopt the same crown beam structure, the construction is simple and convenient, and the field implementation is easy. Strengthen the armpit structure and can increase the pulling force to the guan liang, link to each other with the anchor pile, can effectively reduce the deformation displacement volume at a fender pile top.

Description

Supporting pile reinforcing structure positioned outside foundation pit and construction method thereof

Technical Field

The invention belongs to the field of construction of deep foundation pits of constructional engineering, and particularly relates to a support pile reinforcing structure positioned outside a foundation pit and a construction method thereof.

Background

When deep foundation pit engineering is implemented, a foundation pit support is generally implemented by adopting a support pile structure, but if the depth of a foundation pit is too large, peripheral soil layers are weak or other disadvantages exist, reinforcement and reinforcement measures need to be added. The most applied method at present is a foundation pit internal support method (a concrete structure and a steel structure), which can effectively strengthen a foundation pit support structure and ensure the safety and stability of a deep foundation pit structure. However, in this way, the inner support needs to be removed at a later stage. If the concrete inner supporting structure is adopted, the breaking and cleaning cost is high, and the construction period influence is long; if support in the steel construction, demolish the handling and still can occupy more time, influence follow-up construction, cause the influence to the whole progress of project.

Disclosure of Invention

The invention aims to: the invention provides a supporting pile reinforcing structure positioned outside a foundation pit and a construction method thereof, and solves the problem that the later-stage dismantling of the existing foundation pit inner supporting method is inconvenient. The invention combines the actual situation of the site, can obviously improve the integral stability of the supporting structure, effectively reduces the deformation of the foundation pit and further eliminates the potential safety hazard of the deep foundation pit. After the method is used, the support does not need to be removed and cleared, a large amount of labor and mechanical cost consumed for removing the inner support in clearing and transporting is saved compared with the traditional method, and the progress of the engineering project is not influenced. Overall, be favorable to engineering cost control, safety control, progress management and energy-concerving and environment-protective work.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a be located outside fender pile additional strengthening of foundation ditch, is including enclosing the fender at the fender pile of foundation ditch lateral wall, still including being located the outside anchor pile of foundation ditch, is connected with between the top of fender pile and guan liang, and the top of anchor pile is connected with guan liang through strengthening the armpit.

Furthermore, the anchoring piles are arranged at intervals along the direction of the side wall of the foundation pit.

Furthermore, the reinforcing armpit comprises a triangular section and a straight line section which are integrated, the inner side edge of the triangular section is connected with the crown beam, the outer end angle of the triangular section is connected with the straight line section, and the straight line section is connected with the anchoring pile.

Furthermore, the side wall of the foundation pit is provided with an anchor hole, the side wall of the anchor hole is provided with a reaming hole, grouting materials are arranged in the anchor hole and the reaming hole, an anchor part is arranged in the anchor hole through the grouting materials, a reaming and solidifying body is formed in the reaming hole through the grouting materials, the inner end of the reaming and solidifying body is clamped and matched with the outer end of the anchor pile, the end part of the anchor part is connected with an anchor head component, and the anchor head component presses the horizontal channel steel on the inner end of the support pile.

Furthermore, the anchor head component comprises a supporting steel plate, a steel plate cushion block and an anchor, wherein the supporting steel plate is pressed with an upper horizontal channel steel and a lower horizontal channel steel, the anchor is positioned between the upper horizontal channel steel and the lower horizontal channel steel, the end part of the anchor is connected with the anchor, the upper end of the anchor is contacted with the upper end of the supporting steel plate, and the steel plate cushion block is arranged between the lower end of the anchor and the lower end of the supporting steel plate.

Further, the upper portion of strengthening the armpit be equipped with escape canal and sclerosis ground, the escape canal is located the inboard and arranges along the direction of foundation ditch lateral wall, sclerosis ground is located the outside.

The construction method of the support pile reinforcing structure positioned outside the foundation pit comprises the steps of firstly completing construction of support piles and anchor piles, then carrying out reinforcement of the top beam and the reinforcing armpits, and pouring the top beam and the reinforcing armpits into a whole.

Furthermore, the diameter, the concrete strength grade, the reinforcing steel bar specification and the number of the anchoring piles are not less than the specification of the supporting piles, and the concrete strength grade, the reinforcing steel bar specification and the number of the reinforcing armpits are not less than the specification of the crown beams.

Furthermore, when reaming is strengthened, the drilling of the anchor hole is firstly carried out, reaming is carried out when drilling to the middle section, then the drilling is carried out to the design depth, then the anchor is put in, grouting materials are poured into the anchor hole and the reaming, the grouting materials form a reaming consolidation body in the reaming, the reaming consolidation body is clamped on the anchor pile to improve the anti-pulling capacity of the anchor, the end part of the anchor is connected with an anchor head component, and the anchor head component presses the horizontal channel steel to improve the outward supporting strength of the support pile.

Furthermore, when the pressurization is reversely pulled, a drainage ditch and a hardened ground are arranged above the anchoring pile and the reinforced armpit, the drainage ditch is positioned on the inner side to perform organized drainage, rainwater is prevented from permeating into the soil body outside the pit to increase the supporting external side pressure, the hardened ground is arranged outside the safety distance required by design, a construction road is arranged, and under the actions of road self load, the dynamic load of people and vehicles and the like, the pressing effect on the anchoring pile and the reinforced armpit is formed, so that the tensile force on the supporting structure is increased.

The invention has the beneficial effects that:

1. the structural design position of the anchoring pile ensures the larger top deformation resistance, the same supporting pile structure can be adopted, the construction is simple and convenient, and the field implementation is easy.

2. The reinforced axillary structure can adopt the same-crown beam structure, the construction is simple and convenient, and the field implementation is easy. Strengthen the armpit structure and can increase the pulling force to the guan liang, link to each other with the anchor pile, can effectively reduce the deformation displacement volume at a fender pile top.

3. The reaming reinforcing structure of the anchor (anchor rod/anchor cable) is designed at the outer side of the anchor pile, and under the action of the anchor pile, the anti-pulling performance of the anchor can be greatly enhanced, and the anti-deformation performance of the supporting structure in the vertical middle area is effectively enhanced.

4. The acting force system of the pressurization reverse-pulling is a secondary enhancement safeguard measure arranged on the basis of the anchoring pile and the haunch connecting structure, can effectively reduce the displacement of the supporting structure, enhances the integral stability of the supporting structure, and greatly improves the safety performance of the supporting structure.

5. The structure is constructed once without breaking and clearing, is green and environment-friendly, reduces a large amount of labor and mechanical expenses consumed in dismantling and clearing the inner support by the traditional construction method, and is favorable for cost control.

6. The method has the advantages of no demolition and cleaning work, no influence on subsequent construction of the project, greatly shortened construction period compared with the traditional construction method, and convenience for progress management.

The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.

Drawings

Fig. 1 is a top view of an anchor pile arrangement of the present invention.

Fig. 2 is a side view of an anchor pile arrangement of the present invention.

Fig. 3 is a schematic view of the reinforced axillary connection structure of the present invention.

Fig. 4 is a schematic view of the overall structure of the reinforcing armpit of the present invention.

Fig. 5 is a schematic view of the underreaming reinforcement structure of the present invention.

Fig. 6 is a schematic view of the pressurized counter-pulling structure of the present invention.

In the figure: 1-supporting piles, 2-anchoring piles, 3-crown beams, 4-reinforcing armpits, 5-anchor holes, 6-chambering, 7-anchoring pieces, 8-horizontal channel steel, 9-supporting steel plates, 10-steel plate cushion blocks, 11-anchoring pieces, 12-drainage ditches and 13-hardened ground.

Note: the areas other than the support piles are defaulted to natural soil layers, and soil portions are not filled for clarity of explanation.

Detailed Description

The following non-limiting examples serve to illustrate the invention.

Example 1:

referring to fig. 1 to 6, a supporting pile reinforcing structure located outside a foundation pit includes a supporting pile 1, an anchor pile 2, a crown beam 3, a reinforcing axilla 4, an anchor hole 5, a reaming hole 6, an anchor 7, a horizontal channel steel 8, a supporting steel plate 9, a steel plate cushion block 10, an anchor 11, a drainage ditch 12, and a hardened ground 13.

The support piles 1 are arranged around the side wall of the foundation pit and used for supporting a soil layer outside the foundation pit. Anchor pile 2 is located the foundation ditch outside, for support pile 1 provides the outside support that is located the foundation ditch, moreover in the construction later stage, need not demolish anchor pile 2, has simplified the construction step.

And a crown beam 3 is connected between the tops of the supporting piles 1, and the crown beam 3 is of a reinforced concrete structure and is used for connecting all the supporting piles 1 into a whole so as to improve the overall supporting strength and stability. The top of anchor pile 2 is connected with guan liang 3 through strengthening the armpit 4, strengthens the armpit 4 and is reinforced concrete structure, strengthens armpit 4 and transmits the supporting role with anchor pile 2 for guan liang 3 and fender pile 1, realizes the additional strengthening in the foundation ditch outside.

The anchor piles 2 are arranged at intervals along the direction of the side wall of the foundation pit to form multi-point support for the crown beam 3, and the reliability of the support is guaranteed. Strengthen armpit 4 and include integrative triangle section and straightway, the inboard side of triangle section is connected with crown's roof beam 3, guarantees great supporting action face, and the outer end angle and the straightway of triangle section are connected, and the straightway is connected with anchor pile 2.

The anchor hole 5 has been seted up on the foundation ditch lateral wall, and anchor hole 5 can pass anchor pile 2 also can stagger anchor pile 2, and reaming 6 has been seted up to the lateral wall of anchor hole 5. Grouting materials are arranged in the anchor hole 5 and the reaming hole 6, an anchor part 7 is arranged in the anchor hole 5 through the grouting materials, and the anchor part 7 is an anchor rod or an anchor cable. And a reaming solidification body is formed in the reaming 6 through grouting materials, and the inner end of the reaming solidification body is clamped and matched with the outer end of the anchoring pile 2.

The tip and the anchor head subassembly of anchor 7 are connected, and the anchor head subassembly includes supporting steel plate 9, steel sheet backing block 10 and ground tackle 11, and two horizontal channel-section steels 8 about supporting steel plate 9 presses and establishes horizontal channel-section steel 8 on the inner of a fender pile 1, for a fender pile 1 provides outside support, improves the stability of a fender pile 1. The anchor 7 is located between two upper and lower horizontal channel steel 8, and the tip of anchor 7 is connected with anchor 11, and the upper end of anchor 11 and the upper end contact of support steel sheet 9 are equipped with steel sheet cushion 10 between the lower extreme of anchor 11 and the lower extreme of support steel sheet 9, realize that the slope of anchor 11 is placed, satisfy anchor 7's oblique cutting anchor.

The upper part of the reinforced armpit 4 is provided with a drainage ditch 12 and a hardened ground 13. The drainage ditch 12 is located the inboard and arranges along the direction of foundation ditch lateral wall, assembles the flowing water that will get into in the foundation ditch, avoids ponding influence to strut the effect in the foundation ditch. The hardened ground 13 is located on the outer side, and the hardened ground 13 is used for people and vehicles to walk, provides additional downward pressure for the anchoring piles 2 and the reinforcing armpits 4, thereby improving the structural stability, and acts on the supporting piles 1 and the crown beams 3 to further improve the reliability of the supporting columns.

Example 2:

referring to fig. 1 to 6, a construction method of a support pile reinforcement structure located outside a foundation pit according to embodiment 1: firstly, the construction of the supporting pile 1 and the anchoring pile 2 is completed, then the reinforcement of the crown beam 3 and the reinforcing armpit 4 is carried out, and the crown beam 3 and the reinforcing armpit 4 are simultaneously poured into a whole.

The diameter, the concrete strength grade, the reinforcing bar specification and the number of the anchor piles 2 are not less than those of the support piles 1, and good anchoring strength is guaranteed. Different from the supporting pile 1 which is in a cantilever structure, the periphery of the pile body is in a dense soil condition, and the length of the anchoring pile 2 can be slightly shorter than that of the supporting pile 1 as long as the anchoring pile is ensured to be deep into the supporting structure and a certain depth is arranged below the slip surface of the soil body.

Strengthen the concrete strength grade of armpit 4, arrangement of reinforcement specification and quantity and be not less than the specification of guan liang 3, strengthen armpit 4 and link to each other with 2 pile tops of anchor pile to pour simultaneously as an organic wholely with the guan liang 3 of a fender pile 1, thereby be connected a fender pile 1 and anchor pile 2 as an organic wholely, utilize anchor pile 2 to strengthen a fender pile 1.

When the hole is expanded and reinforced, the anchor hole 5 is drilled, the hole is expanded 6 when the hole is drilled to the middle section, then the hole is drilled to the designed depth, then the anchor 7 is placed, grouting materials are poured into the anchor hole 5 and the hole expansion 6, the grouting materials form a hole expansion consolidation body in the hole expansion 6, and the hole expansion consolidation body is clamped on the anchor pile 2 to improve the anti-pulling capacity of the anchor 7, so that the overall stability of the supporting structure is enhanced. The end of the anchor 7 is connected with an anchor head component, and the anchor head component presses the horizontal channel steel 8 on the support pile 1, so that the outward supporting strength of the support pile 1 is improved as a whole.

When the anchor pile is reversely pulled under pressure, a drainage ditch 12 and a hardened ground 13 are arranged above the anchor pile 2 and the reinforcing armpit 4, the drainage ditch 12 is positioned on the inner side to perform organized drainage, and rainwater is prevented from permeating into the soil body outside the pit to increase the external side pressure of the support. The hardened ground 13 is arranged on a construction road outside the safety distance required by the design, and under the actions of self load of the road, dynamic load of people and vehicles and the like, the pressing effect on the anchoring piles 2 and the reinforcing armpits 4 is formed, so that the tensile force on the supporting structure is increased, the displacement of the supporting structure towards the inner side of the foundation pit can be effectively reduced, and the safety and stability of the foundation pit supporting structure are further enhanced.

The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a be located outside fender pile additional strengthening of foundation ditch, includes fender at foundation ditch lateral wall's fender pile (1), its characterized in that: still including lieing in foundation ditch outside anchor pile (2), be connected with between the top of fender pile (1) and guan liang (3), the top of anchor pile (2) is connected with guan liang (3) through strengthening armpit (4).

2. A fender pile reinforcement structure located outside a foundation pit according to claim 1, wherein: the anchoring piles (2) are arranged at intervals along the direction of the side wall of the foundation pit.

3. A fender pile reinforcement structure located outside a foundation pit according to claim 1 or 2, wherein: the reinforced armpit (4) comprises a triangular section and a straight line section which are integrated, the inner side edge of the triangular section is connected with the crown beam (3), the outer end angle of the triangular section is connected with the straight line section, and the straight line section is connected with the anchoring pile (2).

4. A fender pile reinforcement structure located outside a foundation pit according to claim 1, wherein: foundation ditch lateral wall on seted up anchor eye (5), reaming (6) have been seted up to the lateral wall of anchor eye (5), be equipped with grouting material in anchor eye (5) and reaming (6), be equipped with anchor (7) through grouting material in anchor eye (5), form reaming consolidation body through grouting material in reaming (6), cooperation is established with the outer end card of anchor pile (2) in the inner of reaming consolidation body, the tip and the anchor head subassembly of anchor (7) are connected, the anchor head subassembly is pressed horizontal channel-section steel (8) and is established on the inner of fender pile (1).

5. A fender pile reinforcement structure located outside a foundation pit according to claim 4, wherein: the anchor head component comprises a supporting steel plate (9), a steel plate cushion block (10) and an anchor (11), wherein the supporting steel plate (9) is pressed with an upper horizontal channel steel (8) and a lower horizontal channel steel (8), the anchor (7) is located between the upper horizontal channel steel (8) and the lower horizontal channel steel (8), the end part of the anchor (7) is connected with the anchor (11), the upper end of the anchor (11) is in contact with the upper end of the supporting steel plate (9), and the steel plate cushion block (10) is arranged between the lower end of the anchor (11) and the lower end of the supporting steel plate (9).

6. A fender pile reinforcing structure located outside a foundation pit according to claim 1, 4 or 5, wherein: strengthen the upper portion of armpit (4) be equipped with escape canal (12) and sclerosis ground (13), escape canal (12) are located the inboard and arrange along the direction of foundation ditch lateral wall, sclerosis ground (13) are located the outside.

7. A construction method of a support pile reinforcing structure positioned outside a foundation pit according to any one of claims 1 to 6, characterized by comprising: firstly, the construction of a support pile (1) and an anchor pile (2) is completed, then the reinforcement of a crown beam (3) and a reinforcing armpit (4) is carried out, and the crown beam (3) and the reinforcing armpit (4) are simultaneously poured into a whole.

8. The construction method according to claim 7, wherein: the diameter, the concrete strength grade, the reinforcing steel bar specification and the number of the anchoring piles (2) are not less than the specification of the supporting piles (1), and the concrete strength grade, the reinforcing steel bar specification and the number of the reinforcing armpits (4) are not less than the specification of the crown beams (3).

9. The construction method according to claim 7, wherein: when reaming is strengthened, drilling of the anchor hole (5) is firstly carried out, drilling to the middle section is carried out, reaming (6) is carried out, then drilling is carried out to the design depth, then the anchor part (7) is placed, grouting materials are poured into the anchor hole (5) and the reaming (6), the grouting materials form a reaming consolidation body in the reaming (6), the reaming consolidation body is clamped on the anchor pile (2) to improve the anti-pulling capacity of the anchor part (7), the end part of the anchor part (7) is connected with the anchor head component, and the anchor head component presses the horizontal channel steel (8) to be arranged on the support pile (1) to improve the outward supporting strength of the support pile (1).

10. The construction method according to claim 7 or 9, characterized in that: when the pressurization is reversed to draw, set up escape canal (12) and sclerosis ground (13) in anchor pile (2) and the top of strengthening armpit (4), escape canal (12) are located the inboard and carry out organized drainage, prevent that rainwater from oozing into the outside lateral pressure of the inside increase support of the outer soil body of hole, sclerosis ground (13) are outside the safe distance of design requirement, arrange the construction road, under the effect such as road self load and the dynamic load of people's car, form the effect of pushing down to anchor pile (2) and strengthening armpit (4), thereby increase the pulling force to supporting construction.

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