CN212801556U - Square-round pile combined foundation pit supporting structure - Google Patents

Abstract

The utility model relates to a foundation pit supporting's technical field among the construction engineering, disclose square and round pile combination foundation pit supporting construction, including many round piles, many square piles, one round pile hat roof beam, multichannel straining beam, multichannel outrigger, many stock, stagnant water curtain, wherein, the equidistant vertical construction of round pile is in the foundation pit lateral wall position department of planned excavation, the equidistant vertical construction of square pile is outside the planned excavation foundation pit, round pile hat roof beam is connected with many round piles in round pile top position department, the straining beam links together round pile hat roof beam and square pile to form square and round pile combination supporting construction again, the outrigger is located the straining beam opposite side and links together in the square pile, the stock is constructed perpendicularly in outrigger center department, the stock is located outrigger top surface department; the advantage that the performance circle pile construction is convenient, also the performance square pile can provide great bending resistance's strut advantage, also can avoid simultaneously because of the stock to the phenomenon that the stock anchor length that the foundation ditch outside construction leads to is not enough or encroaches on neighbouring building (structure) space, improves and struts the effect, and reduce cost.

Description

Square-round pile combined foundation pit supporting structure

Technical Field

The patent of the utility model relates to a construction engineering medium foundation ditch supporting's technical field particularly, relates to square and round stake combination underground structure.

Background

The currently known foundation pit supporting structure types are many, and according to the relevant regulations in the national industry standard of people's republic of China, the technical code of foundation pit supporting for buildings (JGJ 120 + 2012), the foundation pit supporting structure can be roughly divided into three categories, namely a retaining structure, a soil nailing wall, a gravity type cement soil wall and the like. Wherein, prop up fender formula structure and contain row's pile, underground continuous wall, stock, interior support, double row pile and the combination supporting construction of each structure again. Each supporting structure has the advantages, disadvantages and application range: the soil nailing wall and the gravity type cement soil wall are only suitable for shallow foundation pits with the safety grades of two and three; the underground continuous wall has the best supporting effect, but has higher manufacturing cost and higher requirement on a construction site; the inner support can effectively control the deformation of the foundation pit, but the support exists in the foundation pit, so that the large-scale mechanical excavation is not facilitated, and the construction period is long; the double-row piles have better supporting effect than single-row piles, but the manufacturing cost is much higher, so that the double-row piles are not economical; the row pile and anchor rod combined support, namely the pile-anchor support, is the most widely applied support structure type in the current foundation pit support, but most of the row piles are round piles, no square pile is stable from the aspect of support stress analysis, and the anchor rods are all constructed towards the outer side of the foundation pit, when existing or planned underground buildings (structures) exist at the periphery of the foundation pit, the phenomenon that the anchor rods are insufficient in anchoring length or occupy the space of the adjacent buildings (structures) is easily caused.

The square pile has stronger supporting advantages compared with a round pile, but the construction difficulty is relatively higher, so that a novel square and round pile combined foundation pit supporting structure is needed, the respective advantages of the square pile and the round pile can be fully exerted, the anchor rod can be prevented from being constructed to the outer side of the foundation pit, the supporting effect can be improved, and the cost can be reduced.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem that exists now, the utility model provides a foundation ditch supporting construction of square and round pile combination.

The utility model discloses a realize like this, square and round pile combination underground structure, including many round piles, many square piles, one round pile hat roof beam, multichannel straining beam, multichannel outrigger, many stock, stagnant water curtain, wherein, the equidistant perpendicular construction in the excavation of planning foundation ditch lateral wall position department of round pile, the equidistant perpendicular construction in the excavation of planning foundation ditch outside of square pile, round pile hat roof beam is in round pile top position department and many the round pile is connected, the straining beam will again round pile hat roof beam with the square pile links together and forms square and round pile combination supporting construction, the outrigger is located the straining beam opposite side and in the square pile links together, the stock is under construction perpendicularly in outrigger center department, the stock anchor head is located outrigger top surface department.

Further, the elevation of the pile top of the circular pile is the same as the elevation of the bottom surface of the crown beam of the circular pile, and the elevation of the pile bottom of the circular pile is located at a certain depth of the bottom surface of the foundation pit.

Furthermore, the distance between the square piles is n times of the distance between the circular piles, n is an integer and is more than or equal to 1.

Furthermore, the central connecting line of the pile tops of the square piles is parallel to the central connecting line of the pile tops of the circular piles, the long sides of the square piles are perpendicular to the side wall of the foundation pit and intersect with the central axis of one of the circular piles, and the short sides of the square piles are parallel to the central connecting line of the pile tops of the square piles.

Further, square pile top elevation is the same as round pile crown beam top elevation, square pile bottom elevation is located a certain degree of depth department in foundation ditch bottom surface.

Furthermore, on the same horizontal plane the straining beam with the outrigger is symmetrical to the center line of round pile with the square pile, the top elevation of round pile crown roof beam, the straining beam and the outrigger all is the same as place 0.000 elevation, the bottom elevation of round pile crown roof beam, the straining beam and the outrigger all is the same.

Further, the anchor bar vertically applies a prestress to the outrigger.

Further, the waterproof curtain is a high-pressure jet grouting or swing-jetting grout curtain among piles, and the anchor rod is a prestressed anchor rod.

Furthermore, the circular pile crown beam, the tension beam and the cantilever beam are all made of reinforced concrete.

Furthermore, the circular piles and the square piles are both reinforced concrete cast-in-place piles.

Compared with the prior art, the utility model provides a square and round stake combination underground structure has following benefit: all round piles are connected through the round pile crown beam, the round pile crown beam and all square piles are connected through the pull beam to form a stable whole, prestress is exerted on the cantilever beam connected with the square piles by the anchor rods at last, the stability of the whole square and round pile combined supporting structure is improved, the advantage that the round piles are convenient to construct is brought into play, the supporting advantage that the square piles can provide large bending resistance is brought into play, meanwhile, the phenomenon that the anchor rods cannot anchor the long enough or occupy the space of a neighboring building (structure) due to the fact that the anchor rods construct towards the outer side of the foundation pit is avoided, the supporting effect is improved, and the cost is reduced.

Drawings

Fig. 1 is a schematic plan view of the middle square round pile combined foundation pit supporting structure of the utility model;

fig. 2 is a front view of the square-round pile combined foundation pit supporting structure of the utility model;

fig. 3 is the utility model discloses well square round pile combination underground structure's section view.

Wherein, 1, round pile; 2. square piles; 3. a circular pile crown beam; 4. drawing a beam; 5. a cantilever beam; 6. an anchor rod; 7. and (6) a waterproof curtain.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 1-3, the preferred embodiment of the present invention is shown.

The square and round pile combined foundation pit supporting structure provided by the embodiment can be used for foundation pit supporting construction, and of course, can also be used for other building constructions, and is not limited to the application in the embodiment.

Square-round pile combined foundation pit supporting structure, including many round piles 1, many square piles 2, one round pile crown beam 3, multichannel straining beam 4, multichannel outrigger 5, many stock 6, stagnant water curtain 7, wherein, round pile 1 equidistant vertical construction is in planning excavation lateral wall position department, square pile 2 equidistant vertical construction is in planning excavation foundation pit outside, round pile crown beam 3 is connected with many round piles 1 in round pile 1 pile top position department, the straining beam 4 links together round pile crown beam 3 and square pile 2 and forms square-round pile 1 combined supporting structure, outrigger 5 is located the straining beam 4 opposite side and links together in square pile 2, stock 6 vertical construction is in outrigger 5 central department, stock 6 anchor heads are located outrigger 5 top surface department.

The elevation of the pile top of the round pile 1 is the same as the elevation of the bottom surface of the round pile crown beam 3, and the elevation of the pile bottom of the round pile 1 is positioned at a certain depth of the bottom surface of the foundation pit.

The distance between the square piles 2 is n times of the distance between the circular piles 1, n is an integer and is more than or equal to 1.

The central connecting line of the pile tops of the square piles 2 is parallel to the central connecting line of the pile tops of the circular piles 1, the long edges of the square piles 2 are perpendicular to the side wall of the foundation pit and intersect with the central axis of one of the circular piles 1, and the short edges of the square piles 2 are parallel to the central connecting line of the pile tops of the square piles 2.

The elevation of the pile top of the square pile 2 is the same as that of the top surface of the circular pile crown beam 3, and the elevation of the pile bottom of the square pile 2 is positioned at a certain depth of the bottom surface of the foundation pit.

The draw beam 4 and the outrigger 5 are symmetrical to the central connecting line of the round pile 1 and the square pile 2 on the same horizontal plane, the top surface elevations of the round pile crown beam 3, the draw beam 4 and the outrigger 5 are the same as the site elevation plus or minus 0.000 elevation, and the bottom surface elevations of the round pile crown beam 3, the draw beam 4 and the outrigger 5 are the same.

The anchor rod 6 vertically applies prestress on the cantilever beam 5, so that the stability of the whole square and round pile 1 combined supporting structure is improved.

The waterproof curtain 7 is a high-pressure jet grouting or swing jet grouting curtain among piles, and the anchor rod 6 is a prestressed anchor rod 6.

The circular pile crown beam 3, the tension beam 4 and the cantilever beam 5 are all made of reinforced concrete.

The circular pile 1 and the square pile 2 are both reinforced concrete cast-in-place piles, so that disturbance to field soil can be effectively reduced.

The square and round pile combined foundation pit supporting structure has the following benefits: connect all round piles 1 through round pile crown beam 3, rethread straining beam 4 is connected round pile crown beam 3 and all square piles 2 and is formed a stable whole, reuse stock 6 is exerted prestressing force on outrigger 5 of being connected with square pile 2 at last, the stability of whole square pile 1 combination supporting construction has been increased, the convenient advantage of round pile 1 construction has both been brought into play, square pile 2 has also been brought into play and the advantage of strutting that can provide great bending resistance can be brought into play, also can avoid simultaneously because of 6 not enough or encroaching the phenomenon of neighbouring building (structure) space of 6 anchor lengths of stock that the construction leads to outside the foundation ditch of stock 6, the effect of strutting is improved, and the cost is reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Square-round pile combined foundation pit supporting structure is characterized by including many round piles, many square piles, one round pile crown beam, multichannel straining beam, multichannel outrigger, many stock, stagnant water curtain, wherein, the equidistant perpendicular construction in the excavation-planned foundation pit lateral wall position department of round pile, the equidistant perpendicular construction in the excavation-planned foundation pit outside of square pile, round pile crown beam is in round pile top position department and many the round pile is connected, the straining beam will again round pile crown beam with the square pile links together and forms square-round pile combined supporting structure, the outrigger is located the straining beam opposite side and in the square pile links together, the stock is under construction perpendicularly in outrigger center department, the stock anchor head is located outrigger top surface department.

2. The square-round pile combined foundation pit supporting structure of claim 1, wherein the top elevation of the round pile is the same as the bottom elevation of the round pile top beam, and the bottom elevation of the round pile is located at a certain depth of the bottom of the foundation pit.

3. The square-round pile combined foundation pit supporting structure of claim 2, wherein the square pile interval is n times of the round pile interval, n is an integer, and n is greater than or equal to 1.

4. The combined square and round pile foundation pit supporting structure of claim 3, wherein the connecting line of the centers of the tops of the square piles is parallel to the connecting line of the centers of the tops of the round piles, the long sides of the square piles are perpendicular to the side walls of the foundation pit and intersect with the central axis of one of the round piles, and the short sides of the square piles are parallel to the connecting line of the centers of the tops of the square piles.

5. The square-round pile combined foundation pit supporting structure of claim 4, wherein the top elevation of the square pile is the same as the top elevation of the round pile top beam, and the bottom elevation of the square pile is located at a certain depth of the bottom surface of the foundation pit.

6. The square-round pile combined foundation pit supporting structure of claim 5, wherein the tension beam and the cantilever beam are symmetrical to a central connecting line of the round pile and the square pile on the same horizontal plane, the top surface elevations of the round pile crown beam, the tension beam and the cantilever beam are all the same as a site plus or minus 0.000 elevation, and the bottom surface elevations of the round pile crown beam, the tension beam and the cantilever beam are all the same.

7. The square-round pile combined foundation pit supporting structure of claim 6, wherein the anchor rods vertically apply prestress to the outriggers.

8. The square and round pile combined foundation pit supporting structure of any one of claims 1-7, wherein the waterproof curtain is an inter-pile high-pressure jet grouting or pendulum jet grouting curtain, and the anchor rod is a prestressed anchor rod.

9. The square-round pile combined foundation pit supporting structure of claim 8, wherein the round pile crown beam, the tension beam and the cantilever beam are all made of reinforced concrete.

10. The square-round pile combined foundation pit supporting structure of claim 9, wherein the round pile and the square pile are both cast-in-place reinforced concrete piles.

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