CN219604367U - Supporting pile supporting structure before combining profile steel close-inserted cement soil stirring wall - Google Patents
Supporting pile supporting structure before combining profile steel close-inserted cement soil stirring wall Download PDFInfo
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- CN219604367U CN219604367U CN202320544841.3U CN202320544841U CN219604367U CN 219604367 U CN219604367 U CN 219604367U CN 202320544841 U CN202320544841 U CN 202320544841U CN 219604367 U CN219604367 U CN 219604367U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model relates to a supporting structure of a profile steel close-inserted cement soil stirring wall combined with a front supporting pile, which comprises a profile steel cement soil stirring wall (1), a cement soil stirring pile (2), a front supporting pile (3), a soil facing side profile steel (4) and a reinforced concrete enclosing purlin (5); the steel reinforced concrete cement soil stirring wall is characterized in that a plurality of groups of steel sections are densely inserted in the steel reinforced cement soil stirring wall (1) at intervals, a cement soil stirring pile (2) and a front supporting pile (3) are correspondingly arranged on the soil facing side and the pit facing side of the steel reinforced cement soil stirring wall (1), the front supporting pile (3) is inserted between the adjacent groups of steel sections, a soil facing side steel section (4) is arranged in the cement soil stirring pile (2), and the steel reinforced concrete enclosing purlin (5) connects the front supporting pile (3), the soil facing side steel section (4) and the steel reinforced cement soil stirring wall (1) into a whole. Compared with the prior art, the utility model solves the problem of collision of the front supporting pile and the section steel in the section steel closely inserted cement-soil stirring wall fender post at the surrounding purlin, and simultaneously ensures that the integral rigidity of the fender post is not weakened.
Description
Technical Field
The utility model relates to the technical field of foundation pit engineering support design and construction, in particular to a front support pile support structure for a steel-shaped dense-insert cement-soil mixing wall.
Background
With the development of large-scale underground spaces in modern cities, the development area of the underground spaces is larger and larger. The foundation pit of the ultra-large area underground space adopts a common horizontal supporting system, and has poor economy. The front bracing pile adopts the vertical diagonal bracing to support the bearing layer at the bottom of the foundation pit, so that the cost of the support is greatly saved, and the economy of the front bracing pile is increased along with the increase of the area of the foundation pit. In addition, the front supporting piles are generally made of prefabricated components, maintenance is not needed, and the construction period can be further saved. Therefore, the front bracing pile is favored by construction units in foundation pit supporting design with ultra-large area. When the front support pile and the profile steel are closely inserted into the cement soil stirring wall fender pile for combined use, the problem that the front support pile and the profile steel in the fender pile collide at the position of the fender purlin due to the fact that the distance between the closely inserted profile steels is relatively dense. At present, in engineering practice, the section steel at the collision position with the front supporting pile is often canceled or the front supporting pile is adopted to shift into the foundation pit so as to avoid the section steel, so that the front supporting pile is ensured to be smoothly connected with the enclosing purlin. Obviously, the whole bending rigidity of the fender post is weakened due to the elimination of the profile steel, so that the deformation of the fender body in the process of excavating the foundation pit is increased, and the surrounding environment of the foundation pit is protected disadvantageously. The front support piles move inwards in the foundation pit to avoid the profile steel, and the overall rigidity of the guard piles can be guaranteed not to be weakened, but the front protruding front support piles encircle purlins to prevent the basement structure from being built back, and the front support piles which move forwards cannot be reserved to control the detachment and support deformation.
Disclosure of Invention
The utility model aims to provide a supporting structure of a section steel closely inserted cement-soil stirring wall combined with a front supporting pile, which solves the problem of collision of the front supporting pile and section steel in a section steel closely inserted cement-soil stirring wall fender pile at a surrounding purlin, and simultaneously ensures that the integral rigidity of the fender pile is not weakened.
The aim of the utility model can be achieved by the following technical scheme: a supporting structure of a profile steel close-inserted cement soil stirring wall combined with a front supporting pile comprises a profile steel cement soil stirring wall, a cement soil stirring pile, a front supporting pile, a profile steel on the earth facing side and a reinforced concrete enclosing purlin;
a plurality of groups of section steel are densely inserted in the section steel cement soil stirring wall at intervals, cement soil stirring piles and front supporting piles are respectively and correspondingly arranged on the soil facing side and the pit facing side of the section steel cement soil stirring wall, the front support piles are inserted between adjacent groups of section steel, soil facing side section steel is arranged in the cement soil mixing piles, and the reinforced concrete surrounding purlin connects the front support piles, the soil facing side section steel and the section steel cement soil mixing wall into a whole.
Preferably, the cement-soil mixing pile is vertical to the profile steel cement-soil mixing wall.
Preferably, the profile steel on the earth facing side is parallel to the profile steel in the profile steel cement soil stirring wall.
Preferably, the profile steel in the soil facing side profile steel and the profile steel cement soil stirring wall is H-shaped steel.
Preferably, the joint of the earth facing side profile steel and the reinforced concrete surrounding purlin is provided with an I-steel shear key.
Preferably, the section steel in the section steel cement soil stirring wall is provided with an I-steel shear key at the joint of the section steel and the reinforced concrete surrounding purlin.
Preferably, the height of the profile steel on the earth facing side is lower than that of the profile steel in the profile steel cement soil stirring wall.
Preferably, the front supporting piles are obliquely inserted into the soil body reinforcing layer through the basement.
Further preferably, the front support pile is provided with a bottom plate water stop sheet in the bottom plate of the basement.
Still more preferably, the water stop sheet of the bottom plate is horizontally arranged.
Further preferably, the front supporting piles are provided with external wall water stopping sheets in the external wall of the basement.
Still further preferably, the external wall water stop sheet is vertically arranged.
The construction method of the supporting structure comprises the following steps:
step one: constructing a steel reinforced cement mixing wall, wherein the steel reinforced cement is inserted by means of dead weight within 30 minutes after the construction of the cement mixing wall main body is finished;
step two: the corresponding position of the front supporting pile is vertical to the constructed cement-soil stirring wall, a cement-soil stirring pile is constructed on the soil facing side, and the profile steel on the soil facing side is inserted by means of self weight within 30 minutes after the construction of the cement-soil stirring pile is finished;
step three: constructing a front supporting pile within a week after the construction of a soil body reinforcing layer in the foundation pit is completed;
step four: constructing a reinforced concrete surrounding purlin, and connecting a front supporting pile, a soil facing side section steel and a section steel cement soil stirring wall into a whole;
step five: foundation pit dewatering, earth excavation and basement construction; the front support piles are provided with bottom plate water stop sheets in the bottom plate of the basement; the front support piles which are required to be reserved and detached after the bottom plate is poured are also arranged in the basement outer wall;
step six: and (5) recovering the section steel in the section steel cement soil stirring wall after backfilling the foundation pit.
Preferably, in the second step, the cement-soil mixing pile constructed on the earth facing side is sleeved with a hole or is constructed in a lap joint mode according to requirements, and the elevation of the profile steel top on the earth facing side is appropriately lowered to avoid the pile pressing path of the front supporting pile.
Preferably, in the fourth step, the reinforced concrete surrounding purlin should be protruded at the position of the front supporting pile to wrap the profile steel on the earth facing side.
Preferably, in the fifth step, the upper part of the reinforced concrete purlin is chiseled off when the profile steel on the earth facing side is recovered, so that the profile steel is exposed and is recovered by adopting a hydraulic jack.
Compared with the prior art, the utility model has the following advantages:
1. the utility model solves the problem of collision of the front supporting piles and the section steel in the section steel closely inserted cement-soil stirring wall fender post at the position of the enclosing purlin, and simultaneously ensures that the integral rigidity of the fender post is not weakened;
2. compared with the existing method for convexly wrapping the front support piles in the foundation pit, the method effectively avoids the conflict problem during the construction of the basement structure, so that the front support piles can be reserved and removed after backfilling the foundation pit, and the adverse effect of the foundation pit engineering support removal deformation on the surrounding environment can be well controlled;
3. the thickness of the enclosure body is widened by adopting the postpositive widening of the section steel (the spacing is a certain modulus of the stirring pile), the rigidity of the vertical body is increased by the connection of the outer convex enclosure purlins, and the excavation deformation of the foundation pit is effectively controlled, so that the surrounding environment of the foundation pit is better protected;
4. aiming at the problem of collision of the section steel in the front supporting pile and the section steel closely inserted cement-soil stirring wall enclosure pile at the position of the enclosure purlin, the section steel at the collision position of the front supporting pile is moved backwards and the top elevation is pressed down to avoid the collision, all the section steel is poured into a whole through the reinforced concrete enclosure purlin, the whole rigidity of the section steel closely inserted cement-soil stirring wall enclosure is not weakened, the excavation deformation of a foundation pit is effectively controlled, and therefore the surrounding environment of the foundation pit is better protected.
Drawings
FIG. 1 is a schematic view of a supporting structure according to embodiment 1 of the present utility model;
FIG. 2 is a schematic diagram of a supporting structure according to embodiment 1 of the present utility model;
FIG. 3 is a top view of a support structure according to embodiment 1 of the present utility model;
FIG. 4 is a side view of a support structure according to embodiment 1 of the present utility model;
FIG. 5 is a rear view of the support structure of embodiment 1 of the present utility model;
FIG. 6 is a front view of a support structure according to embodiment 1 of the present utility model;
FIG. 7 is a top view of a support structure according to embodiment 2 of the present utility model;
FIG. 8 is a section view taken from 1-1 of FIG. 7;
in the figure: the concrete reinforced concrete wall comprises a 1-section steel cement soil stirring wall, a 2-cement soil stirring pile, a 3-front supporting pile, 4-earth facing side section steel, a 5-reinforced concrete enclosing purlin, a 6-I-shaped steel shear key, a 7-basement, an 8-soil reinforcing layer, a 9-bottom plate water stop sheet and a 10-outer wall water stop sheet.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples. The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present utility model, but the scope of the present utility model is not limited to the following examples.
Example 1
The steel section dense-inserted cement-soil mixing wall combined front supporting pile supporting structure comprises a steel section cement-soil mixing wall 1, a cement-soil mixing pile 2, a front supporting pile 3, a soil facing side steel section 4 and a reinforced concrete enclosing purlin 5 as shown in figures 1-6.
Wherein a plurality of groups of section steel are densely inserted in the section steel cement mixing wall 1 at intervals, cement mixing piles 2 and front supporting piles 3 are correspondingly arranged on the soil facing side and the pit facing side of the section steel cement mixing wall 1 respectively, the front supporting piles 3 are inserted between adjacent groups of section steel, the soil facing side section steel 4 is arranged in the cement mixing piles 2, and the reinforced concrete enclosing purlin 5 connects the front supporting piles 3, the soil facing side section steel 4 and the section steel cement mixing wall 1 into a whole.
The section steel at the collision position with the front supporting pile is actually shifted outwards from the foundation pit and is pressed downwards to reach the top elevation, the front supporting pile surrounding purlin is outwards protruded to wrap the section steel towards the foundation pit, the problem of collision of the front supporting pile and the section steel in the surrounding purlin of the cement soil stirring wall surrounding pile is solved, and meanwhile the integral rigidity of the surrounding pile is guaranteed not to be weakened.
Example 2
The foundation pit area of the embodiment is about 9 ten thousand square meters, and the general excavation depth is 6.9m. As shown in fig. 7 to 8, the foundation pit supporting structure adopts a section steel cement soil stirring wall (a triaxial cement soil stirring pile phi 850@600 is inserted into a section steel H700x300, the section steel is inserted into two-step one, and the local section steel is closely inserted into the section steel) to be combined with a front supporting pile (a grouting steel pipe phi 325x8, and the length of the steel pipe is l=17m). The specific implementation steps of the section steel close-insert area combined front supporting pile are as follows:
step one: constructing a profile steel cement mixing wall 1, wherein the profile steel is inserted by means of self weight within 30 minutes after the construction of the main body of the cement mixing wall 1 is finished;
step two: the corresponding position of the front supporting pile 3 is vertical to the constructed cement mixing wall 1, a cement mixing pile 2 is constructed on the earth facing side, and the earth facing side profile steel 4 is inserted by means of self weight within 30 minutes after the construction of the cement mixing pile 2 is finished;
step three: constructing a front supporting pile 3 within a week after the construction of a soil body reinforcing layer 8 in a foundation pit is completed;
step four: constructing a reinforced concrete enclosing purlin 5, and connecting a front supporting pile 3, a soil facing side section steel 4 and a section steel cement soil stirring wall 1 into a whole; i-steel shear keys 6 are arranged at the joints of the section steel (comprising the section steel 4 on the earth facing side and the section steel in the section steel cement-soil stirring wall 1) and the reinforced concrete enclosing purlins 5;
step five: foundation pit dewatering, earth excavation and basement 7 construction; the front supporting piles 3 are provided with a bottom plate water stop sheet 9 in the bottom plate of the basement 7; the front support piles which are required to be reserved and detached after the bottom plate pouring is completed are also arranged in the basement outer wall, and an outer wall water stop sheet 10 is also required to be arranged;
step six: recovering the section steel in the section steel cement soil stirring wall 1 after backfilling the foundation pit; before the earth facing side section steel 4 is recovered, part of the purlin is required to be chiseled off, so that the section steel is exposed and is recovered by adopting a hydraulic jack.
In the practice of combining the profile steel close-inserted cement soil stirring wall with the front support pile supporting engineering, the profile steel at the position conflicting with the front support is often canceled, so that the bending rigidity of the fender pile is weakened, and the foundation pit excavation deformation control is unfavorable. The utility model adopts the rear-mounted profile steel and widens the thickness of the enclosure body, and increases the rigidity of the vertical body through the connection of the outer convex enclosure purlins, thereby effectively controlling the excavation deformation of the foundation pit. The front support pile can be reserved until the foundation pit is backfilled and removed, and the adverse effect of the foundation pit engineering support removal deformation on the surrounding environment can be well controlled, so that the surrounding environment of the foundation pit is well protected.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.
Claims (10)
1. The supporting structure is characterized by comprising a profile steel cement soil stirring wall (1), a cement soil stirring pile (2), a front supporting pile (3), a soil facing side profile steel (4) and a reinforced concrete enclosing purlin (5);
the steel reinforced concrete cement soil stirring wall is characterized in that a plurality of groups of steel sections are densely inserted in the steel reinforced cement soil stirring wall (1) at intervals, a cement soil stirring pile (2) and a front supporting pile (3) are correspondingly arranged on the soil facing side and the pit facing side of the steel reinforced cement soil stirring wall (1), the front supporting pile (3) is inserted between the adjacent groups of steel sections, a soil facing side steel section (4) is arranged in the cement soil stirring pile (2), and the steel reinforced concrete enclosing purlin (5) connects the front supporting pile (3), the soil facing side steel section (4) and the steel reinforced cement soil stirring wall (1) into a whole.
2. The steel section dense-inserting cement-soil mixing wall combined front supporting pile supporting structure according to claim 1, wherein the cement-soil mixing pile (2) is perpendicular to the steel section cement-soil mixing wall (1).
3. The steel section dense-inserting cement-soil mixing wall combined front supporting pile supporting structure according to claim 1, wherein the earth-facing side steel section (4) is parallel to the steel section in the steel section cement-soil mixing wall (1).
4. The steel section dense-inserting cement-soil mixing wall combined front supporting pile supporting structure according to claim 1, wherein the steel sections in the earth facing side steel section (4) and the steel section cement-soil mixing wall (1) are all H-shaped steel sections.
5. The steel section dense-inserting cement soil stirring wall combined front supporting pile supporting structure according to claim 1, wherein an I-steel shear key (6) is arranged at the joint of the earth facing side steel section (4) and the reinforced concrete surrounding purlin (5).
6. The steel section dense-inserting cement-soil stirring wall combined front supporting pile supporting structure according to claim 1, wherein an I-steel shear key (6) is arranged at the joint of the steel section in the steel section cement-soil stirring wall (1) and the reinforced concrete enclosing purlin (5).
7. The steel section dense-inserting cement-soil mixing wall combined front supporting pile supporting structure according to claim 1, wherein the height of the steel section (4) on the earth facing side is lower than that of the steel section in the steel section cement-soil mixing wall (1).
8. The steel section dense-inserting cement soil mixing wall combined front supporting pile supporting structure according to claim 1, wherein the front supporting pile (3) penetrates through the basement (7) and is obliquely inserted into the soil reinforcing layer (8).
9. The steel section dense-inserting cement-soil mixing wall combined front supporting pile supporting structure according to claim 8, wherein the front supporting pile (3) is provided with a bottom plate water stop sheet (9) in the bottom plate of the basement (7).
10. The steel section dense-inserting cement-soil mixing wall combined front supporting pile supporting structure according to claim 8, wherein the front supporting pile (3) is provided with an outer wall water stop sheet (10) in the outer wall of the basement (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320544841.3U CN219604367U (en) | 2023-03-20 | 2023-03-20 | Supporting pile supporting structure before combining profile steel close-inserted cement soil stirring wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320544841.3U CN219604367U (en) | 2023-03-20 | 2023-03-20 | Supporting pile supporting structure before combining profile steel close-inserted cement soil stirring wall |
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| CN219604367U true CN219604367U (en) | 2023-08-29 |
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| CN202320544841.3U Active CN219604367U (en) | 2023-03-20 | 2023-03-20 | Supporting pile supporting structure before combining profile steel close-inserted cement soil stirring wall |
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- 2023-03-20 CN CN202320544841.3U patent/CN219604367U/en active Active
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