CN217105190U

CN217105190U - Splitting grouting rock anchor pile foundation suitable for complex geological conditions

Info

Publication number: CN217105190U
Application number: CN202220639943.9U
Authority: CN
Inventors: 屈夏霞
Original assignee: CSCEC Aecom Consultant Co Ltd
Current assignee: CSCEC Aecom Consultant Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-08-02
Anticipated expiration: 2032-03-22

Abstract

The utility model discloses a splitting slip casting rock anchor pile basis suitable for complicated geological conditions belongs to high building basic design field such as mountain area wind-powered electricity generation facility, has solved the higher problem of traditional rock anchor pile basis to the integrality requirement of rock. The utility model discloses it has the shallow foundation ditch to excavate on the ground, has pour the reinforced concrete cushion cap in the shallow foundation ditch, is equipped with a plurality of preformed holes on the reinforced concrete cushion cap, has seted up a plurality ofly on the ground and has preformed the corresponding slip casting hole in hole position, is equipped with the anchor rod in slip casting hole and the preformed hole, forms the foundation pile core and the foundation pile core after the fracture slip casting in the slip casting hole is all around. The branch veins and the pile core consolidate the rock and the soil body into a whole, thereby improving the integrity between the foundation and the foundation soil body. The pile core and the anchor bars form a whole after being solidified and hardened, the anchor bars have strong tensile capacity, the pile core and the branch veins have strong compressive capacity, and the pile core and the branch veins work cooperatively, so that the stress performance is optimized.

Description

Splitting grouting rock anchor pile foundation suitable for complex geological conditions

Technical Field

The utility model belongs to high building foundation design field such as mountain area wind-powered electricity generation facility, concretely relates to splitting slip casting rock anchor pile basis suitable for complicated geological conditions.

Background

Due to the high rise of structures such as wind power facilities, the foundation of the structure not only needs to bear the vertical load of an upper structure, but also needs to bear the tensile force generated under the horizontal action of wind load and the like, so that the foundation not only needs to bear the pressure generated by the vertical load of the upper part, but also needs to meet the requirements of pulling resistance and overturning resistance under the tensile force generated by the horizontal load. In addition, most of such buildings/structures are located in mountainous areas, most of foundation soil is rocks and gravels, geological conditions are complex, excavation difficulty is high, and large construction machinery is difficult to drive into the site. The rock anchor pile foundation is widely applied to construction projects such as the above-mentioned buildings/structures because of its construction convenience, but the traditional rock anchor pile foundation has high requirements for the integrity of rocks, which limits its application in the above-mentioned projects.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a splitting slip casting rock anchor pile basis suitable for complicated geological conditions to solve traditional rock anchor pile basis and require higher problem to the integrality of rock.

The technical scheme of the utility model is that: a shallow foundation pit is excavated on a foundation, a reinforced concrete bearing platform is poured in the shallow foundation pit, a plurality of preformed holes are formed in the reinforced concrete bearing platform, a plurality of grouting holes corresponding to the preformed holes are formed in the foundation, anchor bars are arranged in the grouting holes and the preformed holes, and a pile core and a branch vein around the pile core are formed after fracturing and grouting in the grouting holes.

As a further improvement of the utility model, the upper end of the anchor bar is fixed at the top of the reinforced concrete bearing platform.

As the utility model discloses a further improvement, the dowel upper end is equipped with spacing backing plate, and the dowel upper end is equipped with the screw thread section, is connected with fastening nut in the screw thread section, and spacing backing plate is located between fastening nut and the reinforced concrete cushion cap.

As a further improvement of the utility model, the bottom of the anchor bar is provided with an anchor plate.

As a further improvement of the utility model, the preformed holes are arranged in a quincunx shape.

As a further improvement, the anchor bars are positioned at the center of the grouting holes and the preformed holes.

As a further improvement of the utility model, the periphery of the reinforced concrete bearing platform is provided with inclined planes.

As a further improvement of the utility model, the anchor bars are HRB 400-grade steel bars.

The utility model has the advantages that:

1. the utility model discloses atress performance is good. The traditional rock anchor pile foundation has higher requirement on the bonding force of mortar and a rock wall, if the construction is not good, the bonding force of the mortar and the rock wall is reduced after the mortar is contracted, and the stress performance of the anchor pile foundation is reduced. And the utility model discloses an anchor pile basis that forms behind the splitting slip casting technique, the thick liquid can be at the soil body between the rock, splitting in the rock crack to the sclerosis that condenses forms the branch arteries and veins in the splitting passageway. The branch veins and the pile core consolidate the rock and the soil into a whole, thereby improving the integrity between the foundation and the foundation soil. The pile core and the anchor bars form a whole after being solidified and hardened, the anchor bars have strong tensile capacity and can meet the requirements of pulling resistance and overturning resistance under the action of pulling force generated by horizontal load, the pile core and the branch veins have strong compressive capacity and can bear pressure generated by vertical load on the upper part, and the pile core and the branch veins work in cooperation, so that the stress performance is optimized.

2. The utility model discloses require low, application scope wide to the geological conditions. Traditional rock anchor pile basis requires highly to the complete degree and the weathering degree of rock, and the utility model discloses an anchor pile basis that splitting slip casting technique formed is applicable to any complicated geological conditions such as rock, rubble, loess, can compensate traditional rock anchor pile basis not enough.

3. The utility model discloses set up the anchor slab in the bottom of dowel, firstly guaranteed the stability of dowel, secondly when guaranteeing the slip casting, the lower extreme ability cover of slip casting pipe is established on the anchor slab, has injectd the position of slip casting pipe through injected hole, anchor slab, has guaranteed the performance on anchor pile basis then.

4. The utility model discloses can carry out mechanized construction, the engineering volume is little, practice thrift building material, construction speed is fast. After drilling of the traditional rock anchor pile foundation, cement mortar needs to be poured into the hole, and the construction speed is low. And the utility model discloses utilize the splitting slip casting technique, put into the dowel in the slip casting pipe, then only need do the location measure of slip casting pipe, the slip casting process is accomplished in the automation, and work efficiency obtains greatly improving.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view before grouting;

FIG. 3 is a top view of a reinforced concrete cap of the present invention;

fig. 4 is the construction schematic diagram of the middle anchor bar and the grouting pipe of the utility model.

In the figure: 1-foundation; 2-shallow foundation pit; 3-a reinforced concrete bearing platform; 4-grouting holes; 5-preparing a hole; 6-pile core; 7-branch vessels; 8-anchor bars; 9-limiting cushion plates; 10-fastening a nut; 11-anchor plate; 12-grouting pipe; 13-a threaded segment; 14-inclined plane.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Examples 1,

As shown in fig. 1-4, a splitting grouting rock anchor pile foundation suitable for complex geological conditions, a shallow foundation pit 2 is excavated on a foundation 1, a reinforced concrete bearing platform 3 is poured in the shallow foundation pit 2, a plurality of preformed holes 5 are arranged on the reinforced concrete bearing platform 3, a plurality of grouting holes 4 corresponding to the preformed holes 5 are arranged on the foundation 1, anchor bars 8 are arranged in the grouting holes 4 and the preformed holes 5, the diameter of the anchor bars 8 is smaller than that of the grouting holes 4 and the preformed holes 5, and a pile core 6 and branch veins 7 around the pile core 6 are formed after splitting grouting in the grouting holes 4.

The upper ends of the anchor bars 8 are fixed on the top of the reinforced concrete bearing platform 3.

The upper end of the anchor bar 8 is provided with a limiting base plate 9, the upper end of the anchor bar 8 is provided with a threaded section 13, the threaded section 13 is connected with a fastening nut 10 through threads, and the limiting base plate 9 is positioned between the fastening nut 10 and the reinforced concrete bearing platform 3.

The bottom of the anchor bar 8 is welded with an anchor plate 11.

The preformed holes 5 are arranged in a quincunx shape.

The anchor bars 8 are positioned in the center of the grouting holes 4 and the preformed holes 5.

The periphery of the reinforced concrete bearing platform 3 is provided with inclined surfaces 14 which can play a role in water dispersion.

The anchor bars 8 are HRB 400-grade steel bars, and the diameter of each anchor bar is 32 mm.

In the foundation construction range, a site is cleaned and leveled, and then a shallow foundation pit 2 is excavated on a foundation 1. Marking hole sites 4 on the bottom of the excavated shallow foundation pit 2, wherein the hole sites are arranged in a quincunx shape. And after the preformed hole 5 is reserved, integrally pouring the reinforced concrete bearing platform 3, after the reinforced concrete bearing platform 3 is poured and maintained, entering a drilling machine, and drilling a hole in the rock or gravel foundation 1 by a drill rod through the preformed hole 5. After drilling, the prefabricated anchor bars 8 are inserted into the grouting holes 4, and the anchor bars 8 need to be located in the center of the grouting holes 4.

After the anchor bars 8 are placed, splitting grouting is started, and the concrete steps are as follows: the lower end of the grouting pipe 12 (floral tube) is opened, the diameter of the grouting pipe 12 is 100mm, the pipe wall is 10mm, the grouting pipe 12 is sleeved outside the anchor bar 8 and is inserted into the grouting hole 4, and the lower end opening of the grouting pipe 12 can be just sleeved on the anchor plate 11. And (3) sealing holes of the reserved holes 5 on the surface of the reinforced concrete bearing platform 3 by adopting a manual method so as to avoid pressure loss in the holes in the splitting grouting process.

Then, a grouting machine and a grouting pipe 12 are connected, and the mixed grout is injected into the grouting hole 4 at a certain pressure. When the pressure is large enough, the rock, the broken stone and the soil body can form a splitting crack under the action of the slurry pressure, and the slurry is condensed and hardened in the crack to form the branch vein 7, so that the integral strength of the foundation can be improved.

After the grouting is completed, the grouting pipe 12 is pulled out. After the grout in the grouting hole is coagulated and hardened and reaches the design strength, the upper end of the anchor bar 8 is sleeved with the limiting base plate 9 and the fastening nut 10 is screwed down, so that the anchor bar 8 is fixed on the concrete bearing platform 3, and the integrity is improved. The next hole is then grouted, preferably in the "hole-by-hole" order.

The utility model provides a splitting slip casting rock anchor pile basis that construction is simple, the suitability is strong, be applicable to complicated geological conditions has improved the wholeness between basis and the ground soil body greatly. The pile core 6 is solidified and hardened to form a whole with the anchor bars 8, the anchor bars 8 have strong tensile capacity, the pile core 6 and the branch veins 7 have strong pressure resistance, and the pile core 6 and the branch veins cooperate to improve the stress performance.

Claims

1. The utility model provides a splitting slip casting rock anchor pile basis suitable for complicated geological conditions which characterized in that: the foundation structure is characterized in that a shallow foundation pit (2) is excavated on a foundation (1), a reinforced concrete bearing platform (3) is poured in the shallow foundation pit (2), a plurality of preformed holes (5) are formed in the reinforced concrete bearing platform (3), a plurality of grouting holes (4) corresponding to the preformed holes (5) are formed in the foundation (1), anchor bars (8) are arranged in the grouting holes (4) and the preformed holes (5), and branch veins (7) around a pile core (6) and the pile core (6) are formed after splitting grouting in the grouting holes (4).

2. The split grouting rock anchor pile foundation suitable for complex geological conditions, according to claim 1, wherein: the upper ends of the anchor bars (8) are fixed on the top of the reinforced concrete bearing platform (3).

3. The split grouting rock anchor pile foundation suitable for complex geological conditions, according to claim 2, wherein: the upper end of the anchor bar (8) is provided with a limiting base plate (9), the upper end of the anchor bar (8) is provided with a thread section (13), the thread section (13) is connected with a fastening nut (10), and the limiting base plate (9) is positioned between the fastening nut (10) and the reinforced concrete bearing platform (3).

4. A split grouting rock anchor pile foundation suitable for complex geological conditions, as claimed in any one of claims 1-3, wherein: and the bottom end of the anchor bar (8) is provided with an anchor plate (11).

5. The split grouting rock anchor pile foundation suitable for complex geological conditions, as claimed in claim 4, wherein: the preformed holes (5) are arranged in a quincunx shape.

6. The split grouting rock anchor pile foundation suitable for complex geological conditions, as claimed in claim 5, wherein: the anchor bars (8) are positioned in the centers of the grouting holes (4) and the preformed holes (5).

7. The split grouting rock bolt pile foundation suitable for complex geological conditions, as claimed in claim 6, wherein: the periphery of the reinforced concrete bearing platform (3) is provided with inclined surfaces (14).

8. The split grouting rock bolt pile foundation suitable for complex geological conditions, as claimed in claim 7, wherein: the anchor bars (8) are HRB 400-grade steel bars.