CN202936798U - Double-row pile structure with prestress vertical anchor cables - Google Patents

Abstract

The utility model relates to a double-row pile structure provided with prestressed vertical anchor cables, which belongs to the technical field of building foundation pit engineering and slope engineering. The utility model comprises a plurality of groups of front row piles and rear row piles arranged in parallel, crown beams I, crown beams II, connecting beams and prestressed vertical anchor cables. The top of the front row of piles and the rear row of piles are respectively equipped with crown beam I and crown beam II, and the crown beam I and crown beam II are connected by connecting beams. There are prestressed vertical anchor cables. After the utility model adds prestressed vertical anchor cables between the piles of the rear row of piles, it can effectively improve the anti-overturning ability of the support structure, reduce the displacement of the support structure, and at the same time reduce the length of the rear row of piles to save the cost .

Description

A double-row pile structure with prestressed vertical anchor cables

technical field

The utility model relates to a double-row pile structure provided with prestressed vertical anchor cables, which belongs to the technical field of building foundation pit engineering and slope engineering.

Background technique

With the development of the economy and the acceleration of the urbanization process, the buildings in the central urban area are becoming more and more dense, especially a large number of new high-rise and super high-rise buildings, and the basements of the buildings are becoming larger and deeper. At present, the support schemes commonly used in my country include: sloping excavation, soil nail wall support, pile anchor support, cement-soil gravity retaining wall, row piles plus inner support structure, double row piles and other support methods. Slope excavation, soil nail wall support, and pile-anchor support construction will inevitably exceed the building red line, but because the land outside the building red line is restricted by national policies or requires permission from relevant departments, this will bring difficulties to the smooth construction of the building basement. It caused great inconvenience; row piles plus inner support structure cost a lot, construction period is long, and the basement structure construction work area is less; the previous double-row pile support structure has the characteristics of good integrity, but it is difficult to resist overturning and deformation Meet the requirements of existing design specifications. Therefore, existing conventional support structures have certain limitations.

Contents of the invention

The purpose of the utility model is to provide a double-row pile support structure which improves the anti-overturning ability and can reduce the displacement.

The technical scheme of the utility model is: a double-row pile structure provided with prestressed vertical anchor cables, including multiple groups of front row piles 1 and rear row piles 2 arranged in parallel, crown beam I3, crown beam II4, connection Beam 5 and prestressed vertical anchor cable 6. The tops of the front row of piles 1 and the rear row of piles 2 are respectively provided with crown beams I3 and crown beams II4, and the crown beams I3 and crown beams II4 are connected by connecting beams 5. Prestressed vertical anchor cables 6 are arranged at unequal intervals.

The anchor head of the prestressed vertical anchor cable 6 is fixed on the crown beam II4 at the top of the rear row of piles 2, and the anchor section 7 of the prestressed vertical anchor cable 6 is located in the soil layer below the bottom of the front row of piles 1.

The length of the anchoring section 7 of the prestressed vertical anchor cable 6 is greater than 6m.

The pile bodies of the front row of piles 1 and the rear row of piles 2 are arranged in a rectangular array and arranged at intervals.

The use steps of the present utility model are:

(1) Determine the diameter (section size), pile spacing and row spacing of the front and rear rows of piles according to the geological conditions of the site and the requirements for the calculation and analysis of the safety and stability of the foundation pit; determine the length of the anchorage section and free section of the prestressed vertical anchor cable and anchor cable spacing; design the pile length, pile body section strength and reinforcement of the front and rear piles; determine the cross-sectional size of the pile crown beam of the front and rear piles and perform reinforcement calculation; determine the cross-sectional size of the connecting beam , spacing and reinforcement amount; determine the construction process of foundation pit excavation.

(2) Row of piles 2 after construction; pile type is determined by design.

(3) Row of piles 1 before construction; pile type is determined by design.

(4) Construction of prestressed vertical anchor cables. the

(5) The top crown beams and connecting beams of the piles before and after the construction make the entire support system form a whole, and all parts are stressed and deformed in coordination.

(6) Apply prestress to the anchor cable; after the prestressed anchor cable is added between the piles of the rear row of piles, the anti-overturning ability of the support structure can be effectively improved and the displacement of the support structure can be reduced.

(7) Earth excavation and transportation.

The beneficial effects of the utility model are: after the prestressed vertical anchor cable is added between the piles of the rear row of piles, the anti-overturning ability of the support structure can be effectively improved, the displacement of the support structure can be reduced, and the rear row of piles can also be reduced. length to save cost.

Description of drawings

Fig. 1 is a schematic diagram of the layout of the utility model;

Fig. 2 is a schematic diagram of a transverse section of the utility model;

Fig. 3 is a schematic diagram of a longitudinal section of the utility model;

The labels in the figure are: 1: front row of piles, 2: rear row of piles, 3: crown beam I, 4: crown beam II, 5: connecting beam, 6: prestressed vertical anchor cable, 7: anchoring section.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model will be further described, but the content of the utility model is not limited to said range.

Example 1: As shown in Figure 1-3, a double-row pile structure with prestressed vertical anchor cables, including 6 groups of front row piles 1 and rear row piles 2 arranged in parallel, crown beam I3, crown beam Ⅱ4. Connecting beam 5 and prestressed vertical anchor cable 6. The tops of the front row of piles 1 and the rear row of piles 2 are respectively provided with crown beams I3 and crown beams II4. Prestressed vertical anchor cable 6 is arranged. The anchor head of the prestressed vertical anchor cable 6 is fixed on the crown beam II4 at the top of the rear row of piles 2, and the anchor section 7 of the prestressed vertical anchor cable 6 is located in the soil layer below the bottom of the front row of piles 1. The length of the anchoring section 7 of the prestressed vertical anchor cable 6 is 6.5m. The pile bodies of the front row of piles 1 and the rear row of piles 2 are arranged in a rectangular array and arranged at intervals.

Embodiment 2: As shown in Figure 1-3, a double-row pile structure with prestressed vertical anchor cables, including 10 groups of front row piles 1 and rear row piles 2 arranged in parallel, crown beam I3, crown beam Ⅱ4. Connecting beam 5 and prestressed vertical anchor cable 6. The tops of the front row of piles 1 and the rear row of piles 2 are respectively provided with crown beams I3 and crown beams II4, and the crown beams I3 and crown beams II4 are connected by connecting beams 5, and the distance between the piles of each group of rear row piles 2 is not equal Prestressed vertical anchor cables 6 are provided. The anchor head of the prestressed vertical anchor cable 6 is fixed on the crown beam II4 at the top of the rear row of piles 2, and the anchor section 7 of the prestressed vertical anchor cable 6 is located in the soil layer below the bottom of the front row of piles 1. The anchoring section 7 of the prestressed vertical anchor cable 6 has a length of 7 m. The pile bodies of the front row of piles 1 and the rear row of piles 2 are arranged in a rectangular array and arranged at intervals.

Embodiment 3: As shown in Figure 1-3, a double-row pile structure with prestressed vertical anchor cables, including 9 groups of front row piles 1 and rear row piles 2 arranged in parallel, crown beam I3, crown beam Ⅱ4. Connecting beam 5 and prestressed vertical anchor cable 6. The tops of the front row of piles 1 and the rear row of piles 2 are respectively provided with crown beams I3 and crown beams II4. Prestressed vertical anchor cable 6 is arranged. The anchor head of the prestressed vertical anchor cable 6 is fixed on the crown beam II4 at the top of the rear row of piles 2, and the anchor section 7 of the prestressed vertical anchor cable 6 is located in the soil layer below the bottom of the front row of piles 1. The anchoring section 7 of the prestressed vertical anchor cable 6 has a length of 8 m.

Claims (4)

1. A double-row pile structure with prestressed vertical anchor cables, characterized in that: it includes multiple groups of parallel-arranged front row piles (1) and rear row piles (2), crown beam I (3), crown Beam II (4), connecting beam (5) and prestressed vertical anchor cable (6); the top of the front row of piles (1) and the rear row of piles (2) are respectively equipped with crown beam I (3) and crown beam Ⅱ (4), crown beam Ⅰ (3) and crown beam Ⅱ (4) are connected by connecting beams (5), and the piles of each group of rear rows of piles (2) are equidistantly or unequally spaced with prestressed Vertical anchor cable (6). 2. The double-row pile structure with prestressed vertical anchor cables according to claim 1, characterized in that: the anchor head of the prestressed vertical anchor cables (6) is fixed on the top of the rear row of piles (2) On the crown beam II (4), the anchoring section (7) of the prestressed vertical anchor cable (6) is located in the soil layer below the pile bottom of the front row of piles (1). 3. The double-row pile structure provided with prestressed vertical anchor cables according to claim 2, characterized in that: the length of the anchor section (7) of the prestressed vertical anchor cables (6) is greater than 6m. 4. The double-row pile structure with prestressed vertical anchor cables according to claim 1, characterized in that: the pile bodies of the front row of piles (1) and the rear row of piles (2) are arranged in a rectangular array arranged and spaced apart from each other.

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