CN217174802U

CN217174802U - Deep basal pit advance support's combination supporting construction

Info

Publication number: CN217174802U
Application number: CN202122056548.6U
Authority: CN
Inventors: 梅洋; 康果; 李子优; 程莹; 王晓毅; 王发玲; 郭运; 赵昀; 朱军
Original assignee: China South Survey And Design Institute Group Co ltd
Current assignee: China South Survey And Design Institute Group Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-08-12
Anticipated expiration: 2031-08-27

Abstract

The utility model provides a deep basal pit advance support's combined supporting structure, this deep basal pit support combined structure includes: the cast-in-situ bored pile, the triaxial mixing pile, the profile steel, the inner support, the upright post, the lattice column, the intercepting ditch, the drainage ditch and the foundation pit are close to the building. And a reinforced concrete crown beam is arranged on the cast-in-situ bored pile. The inner support is connected with the cast-in-situ bored pile through the crown beam. And the section steel is inserted into the three-axis stirring pile to form a vertical advanced support. The utility model has the advantages that: a waterproof curtain is formed by arranging the triaxial mixing pile, so that water in soil on the side wall of the foundation pit is prevented from permeating into the foundation pit; the foundation ditch is nearer apart from peripheral building, does not possess the condition of putting the slope, through set up the shaped steel of interpolation in the triaxial mixing pile, forms advance support, guarantees the security of perpendicular excavation, has also reduced the pile length of drilling bored concrete pile simultaneously, has reduced the setting of waist rail. The combined supporting mode ensures the safety of the whole deep foundation pit supporting structure; meanwhile, the construction cost is saved.

Description

Deep basal pit advance support's combination supporting construction

Technical Field

The utility model relates to a deep basal pit supporting construction especially relates to a deep basal pit advance support's combination supporting construction.

Background

Along with the rapid development of urbanization construction, urban construction land is more and more tense, the underground space of a city is unprecedentedly developed while high buildings are erected, and more deep foundation pits appear in the rapidly-developed town. The periphery of the deep foundation pits often has more built constructions (buildings), so that the deep foundation pits do not have the possibility of partial slope relief nearby. The inner support of the whole deep foundation pit support should be kept at the same elevation, corresponding advanced support measures should be adopted for sections which cannot be locally set to be inclined, the safety of vertical excavation is guaranteed, and meanwhile water (including surface water and underground water) is also a factor which needs to be focused when the foundation pit is designed. Therefore, when there is an adjacent building (structure) around the foundation pit, it is important to provide a safe and reasonable supporting scheme.

Disclosure of Invention

In order to ensure the safety of advanced support of the deep foundation pit and water stop and drainage of the deep foundation pit. The utility model provides a deep basal pit advance support's combination supporting construction can guarantee deep basal pit support's security, guarantees that main building builds in advance, saves time limit for a project and cost.

The technical solution of the utility model is that: a deep basal pit advance support's combination supporting construction includes: the cast-in-situ bored pile comprises a cast-in-situ bored pile, a crown beam, a triaxial mixing pile, profile steel, an inner support, lattice columns, a stand column pile, a catch basin and a drainage ditch.

The cast-in-situ bored piles are vertically arranged along the periphery of the foundation pit, and crown beams are cast at the top ends of the cast-in-situ bored piles; the cast-in-situ bored pile is connected with the horizontally arranged inner support through the crown beam; the inner support is connected with lattice columns which are vertically arranged, the top ends of the lattice columns are inserted into the inner support, and the bottom ends of the lattice columns are inserted into the upright post piles; the three-shaft stirring pile is vertically arranged on the outer side of the cast-in-situ bored pile and is close to the crown beam, and the profile steel is positioned in the three-shaft stirring pile; a circle of intercepting ditches are arranged along the outer side of the triaxial mixing pile; the drainage ditch sets up the round along foundation ditch pit bottom drilling bored concrete pile inboard department.

Furthermore, the triaxial mixing pile forms a waterproof curtain in a sleeving and beating mode and enters the bottom of the foundation pit.

Further, the section steel is closely inserted into the triaxial mixing pile.

Further, the top surface elevation of the section steel is higher than that of the crown beam.

Further, the section steel is channel steel, a small-diameter steel pipe pile or I-steel.

Furthermore, the combined supporting structure also comprises a building at the periphery of the foundation pit, and the building at the periphery of the foundation pit is positioned outside the intercepting ditch.

Further, the building around the foundation pit is close to the foundation pit.

The utility model provides a beneficial effect that technical scheme brought is:

1. the problem that local slope placing cannot be performed on buildings (structures) close to the existing buildings is solved by inserting the profile steel into the three-axis stirring pile, the safety of advanced support of the deep foundation pit is guaranteed by inserting the profile steel into the three-axis stirring pile, the profile steel is mainly common channel steel, small-diameter steel pipe piles, I-shaped steel and the like, the length is about 6m, materials are conveniently obtained and constructed, and the construction cost is saved;

2. the top surface elevation of the cast-in-situ bored pile is reduced by adopting the advanced support of inserting the profile steel into the triaxial mixing pile, the pile length of the cast-in-situ bored pile is reduced, a waist beam is also avoided being arranged to ensure that the whole inner support is positioned at the same elevation, and the construction cost is greatly saved;

3. the profile steel is inserted into the upper portion of the triaxial mixing pile to form an advance supporting structure, and a waterproof curtain is formed on the lower portion of the triaxial mixing pile to guarantee the permeation safety of the whole foundation pit.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a schematic sectional view of a cast-in-situ bored pile and a triaxial mixing pile inserted with steel insert combined support in the embodiment of the present invention;

fig. 2 is the embodiment of the utility model provides an in deep basal pit advance support's combination supporting construction plan view.

In the drawings, the reference numerals designate the following components:

1-cast-in-situ bored pile, 2-crown beam, 3-triaxial mixing pile, 4-section steel, 5-inner support, 6-lattice column, 7-upright column pile, 8-intercepting ditch, 9-drainage ditch and 10-foundation pit peripheral building.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Please refer to fig. 1-2, fig. 1 is a schematic sectional view of the combined supporting structure of the bored pile and the triaxial mixing pile with the inserted profile steel in the embodiment of the present invention, fig. 2 is a schematic sectional view of the combined supporting structure of the advanced deep foundation pit support in the embodiment of the present invention, the combined supporting structure of the deep foundation pit of the advanced support specifically includes: the cast-in-situ bored pile comprises a cast-in-situ bored pile 1, a crown beam 2, a triaxial mixing pile 3, profile steel 4, an inner support 5, lattice columns 6, a stand column pile 7, a catch drain 8, a drainage ditch 9 and a foundation pit peripheral building 10.

The cast-in-situ bored pile 1 is vertically arranged along the periphery of the foundation pit, and a crown beam 2 is cast at the top end of the cast-in-situ bored pile 1; the cast-in-situ bored pile 1 is connected with an inner support 5 which is horizontally arranged through a crown beam 2; the inner support 5 is connected with a lattice column 6 which is vertically arranged, the top end of the lattice column 6 is inserted into the inner support 5, and the bottom end of the lattice column 6 is inserted into the upright post pile 7 by a certain depth;

the triaxial mixing pile 3 is vertically arranged on the outer side of the cast-in-situ bored pile 1, and the profile steel 4 is inserted into the triaxial mixing pile 3 in a close-fitting manner;

a circle of intercepting ditches 8 are arranged along the outer side of the three-axis stirring pile 3; the drainage ditch 9 sets up the round along foundation ditch pit bottom drilling bored concrete pile 1 inboard department.

And the triaxial mixing pile 3 forms a waterproof curtain by adopting a sleeving beating mode and enters the bottom of the foundation pit for a certain length.

The section steel 4 is positioned in the cast-in-situ bored pile 1, and the elevation of the top surface of the section steel 4 is higher than that of the top surface of the crown beam 2.

The section steel 4 is channel steel, a small-diameter steel pipe pile or I-steel and the like.

The building 10 around the foundation pit is close to the foundation pit and is positioned outside the intercepting ditch.

The utility model discloses an implement the step:

s1: leveling a field, measuring and setting out, constructing a triaxial mixing pile 3 along the periphery of the foundation pit to form a waterproof curtain;

s2: in the area close to the periphery of the foundation pit where the building 10 cannot be set on the slope, inserting section steel 4 into the triaxial mixing pile to form an advance support;

s3: constructing a catch basin 8 on the top surface of the foundation pit to prevent surface water from entering the foundation pit;

s4: excavating and constructing a cast-in-situ bored pile 1, constructing a lattice column 6 and a stand column 7 in a foundation pit, wherein the lattice column needs to enter the stand column for a certain depth;

s5: excavating a soil layer to the bottom of the top beam 3, pouring the reinforced concrete top beam 3 and the inner support 5, and excavating to the pit bottom after the strength reaches the design strength;

s6: and constructing a drainage ditch 9 at the bottom of the pit.

The utility model has the advantages as follows:

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a deep basal pit advance support's combination supporting construction which characterized in that: this combination supporting construction includes: the device comprises a cast-in-situ bored pile (1), a crown beam (2), a triaxial mixing pile (3), profile steel (4), an inner support (5), lattice columns (6), upright column piles (7), a catch basin (8) and a drainage ditch (9);

the cast-in-situ bored pile (1) is vertically arranged along the periphery of the foundation pit, and a crown beam (2) is poured at the top end of the cast-in-situ bored pile (1); the cast-in-situ bored pile (1) is connected with a horizontally arranged inner support (5) through a crown beam (2); the inner support (5) is connected with vertically arranged latticed columns (6), the top ends of the latticed columns (6) are inserted into the inner support (5), and the bottom ends of the latticed columns (6) are inserted into the upright post piles (7); the three-axis stirring pile (3) is vertically arranged on the outer side of the cast-in-situ bored pile (1) and is close to the crown beam (2), and the profile steel (4) is positioned in the three-axis stirring pile (3); a circle of intercepting ditch (8) is arranged along the outer side of the three-axis stirring pile (3); the drainage ditch (9) is provided with a circle along the inner side of the cast-in-situ bored pile (1) inserted into the bottom of the foundation pit.

2. The combined supporting structure for the deep foundation pit forepoling of claim 1, wherein: and the triaxial mixing pile (3) forms a waterproof curtain in a sleeving and beating mode and enters the bottom of the foundation pit.

3. The combined supporting structure for the deep foundation pit forepoling of claim 1, wherein: the section steel (4) is closely inserted into the three-shaft stirring pile (3).

4. The combined supporting structure for the deep foundation pit forepoling of claim 1, wherein: the elevation of the top surface of the section steel (4) is higher than that of the top surface of the crown beam (2).

5. The combined supporting structure for the deep foundation pit forepoling of claim 1, wherein: the section steel (4) is channel steel, a small-diameter steel pipe pile or I-steel.

6. The combined supporting structure for the deep foundation pit forepoling of claim 1, wherein: the combined supporting structure further comprises a foundation pit peripheral building (10), and the foundation pit peripheral building (10) is located on the outer side of the intercepting ditch.

7. The combined supporting structure for the deep foundation pit forepoling of claim 6, wherein: and the building (10) around the foundation pit is close to the foundation pit.