CN114960661B - Small foundation pit excavation method for nearby deep foundation pit excavation - Google Patents
Small foundation pit excavation method for nearby deep foundation pit excavation Download PDFInfo
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- CN114960661B CN114960661B CN202210619300.2A CN202210619300A CN114960661B CN 114960661 B CN114960661 B CN 114960661B CN 202210619300 A CN202210619300 A CN 202210619300A CN 114960661 B CN114960661 B CN 114960661B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- General Engineering & Computer Science (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
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Abstract
The invention discloses a small foundation pit excavation method for excavating a deep foundation pit nearby, which comprises the following steps of: 1) Arranging an enclosure structure and a small foundation pit crown beam support around the small foundation pit to be excavated; 2) Cutting off the temporary crown beam support and the temporary waist beam, and arranging a temporary support structure to support the temporary guard piles; 3) Removing concrete at the bottom of the temporary guard pile, enabling the temporary guard pile to incline to one side of the deep foundation pit, adjusting a temporary support structure, and excavating earthwork in the small foundation pit into a gap between the temporary guard pile and the small foundation pit; 4) Adjusting the temporary support structure to enable the temporary guard piles to incline to one side of the deep foundation pit, and backfilling earthwork in the excavated small foundation pit above the temporary guard piles; 5) Repeating the step 4) continuously excavating until the distance between the tail end of the temporary guard pile and the bottom of the deep foundation pit is less than 1m, constructing a temporary transportation channel, removing earthwork, cutting off the temporary guard pile, transporting out, and continuously excavating to the designed elevation. The invention has the characteristics of improving the excavation speed of the small foundation pit, reducing the construction period and the like.
Description
Technical Field
The invention belongs to the field of building construction. More particularly, the invention relates to a method for excavating a small foundation pit which is close to an excavated deep foundation pit.
Background
When the foundation pit is excavated, due to the influence of factors such as traffic untwining and pipeline migration and modification, during the foundation pit construction period, the condition that the foundation pit part cannot be constructed temporarily exists, the foundation pit can only be divided into a main foundation pit and a small foundation pit for construction, the excavation of the main foundation pit is firstly carried out, and after the traffic untwining or pipeline problem is solved, the excavation of the small foundation pit is carried out. The width of the small foundation pit is smaller, the width is only 1-3m, the excavation area is long and narrow, mechanical equipment is difficult to operate in the small foundation pit, and the excavation speed of the small foundation pit is low.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
It is still another object of the present invention to provide a small foundation pit excavation method that has been close to excavation of a deep foundation pit, which can increase the excavation speed of the small foundation pit.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a small foundation pit excavation method which has been close to excavation of a deep foundation pit, comprising the steps of:
1) Arranging an enclosure structure around a small foundation pit to be excavated adjacent to a deep foundation pit, and constructing a small foundation pit crown beam support in the small foundation pit, wherein the small foundation pit crown beam support is connected with the deep foundation pit crown beam support;
2) Cutting off the temporary crown beam support and the temporary waist beam between the deep foundation pit and the small foundation pit after the concrete of the crown beam support of the small foundation pit reaches the design strength, and arranging a temporary support structure on one side of the deep foundation pit to support the temporary guard piles between the deep foundation pit and the small foundation pit;
3) Removing concrete at the bottom of the temporary guard pile in the deep foundation pit, retaining the reinforcing steel bars, bending the temporary guard pile at the concrete removed position to enable the temporary guard pile to incline to one side of the deep foundation pit, adjusting a temporary support structure to support the temporary guard pile, excavating earthwork in the small foundation pit, and backfilling the earthwork into a gap between the temporary guard pile and the small foundation pit;
4) The temporary support structure is adjusted to enable the temporary guard piles to incline to one side of the deep foundation pit, the earthwork in the small foundation pit is excavated, the earthwork is backfilled above the temporary guard piles,
5) Repeating the step 4) continuously excavating until the height between the tail end of the temporary guard pile and the bottom of the deep foundation pit is less than 1m, constructing a temporary transportation channel between the tail end of the temporary guard pile and the bottom of the deep foundation pit, removing earthwork on the temporary guard pile and the small foundation pit by using an excavator and a muck truck, cutting off the temporary guard pile, and removing and transporting the deep foundation pit to ensure that the deep foundation pit is communicated with the small foundation pit, and continuously excavating to the designed elevation.
According to the invention, the temporary guard piles are inclined to one side of the deep foundation pit, and the earthwork above the small foundation pit is excavated into a gap formed by the small foundation pit and the temporary guard piles, so that the height of the earthwork of the small foundation pit is continuously reduced, and the working surface above the earthwork of the small foundation pit is increased, so that the excavator can conveniently operate above the earthwork of the small foundation pit.
Preferably, the temporary guard piles are provided with reinforced concrete inter-pile spray protection. Through setting up the stake and spout the protection, when avoiding interim fender pile slope, the earthwork drops from interim fender pile, and influences interim fender pile's decline.
Preferably, after the earthwork in the small foundation pit is backfilled to a gap between the temporary guard pile and the small foundation pit, the upper surface of the small foundation pit is lower than the waist beam height of the deep foundation pit in the deep foundation pit, the waist beam of the small foundation pit is constructed, the waist beam of the deep foundation pit is connected with the waist beam of the small foundation pit, after the waist beam of the small foundation pit is constructed, the temporary guard pile is continuously declined to enable the earthwork in the small foundation pit to be backfilled above the temporary guard pile, the upper surface of the small foundation pit is lower than the waist beam height of the next deep foundation pit, the waist beam of the small foundation pit is constructed, and the construction is continued until the height distance between the tail end of the temporary guard pile and the bottom of the deep foundation pit is smaller than 1m. The temporary guard piles are obliquely lowered, the earthwork of the small foundation pit is flattened, the depth of the small foundation pit is continuously lowered, and when the small foundation pit descends below the waist beam position of the deep foundation pit, the waist beam of the small foundation pit is constructed; continuing to incline the temporary guard pile, enabling the height of the upper surface of the small foundation pit after the earthwork is leveled to be lower than the position of the waist beam of the next deep foundation pit, constructing the waist beam of the small foundation pit, repeating the operation, and continuing to construct until the height distance between the tail end of the temporary guard pile and the bottom of the deep foundation pit is smaller than 1m.
Preferably, the temporary transportation channel is constructed in the middle of the small foundation pit. Temporary transportation channels are constructed at the middle positions, so that earthwork can be excavated at the two sides of a small foundation pit at the same time, and the earthwork is transported out by using a residue-soil truck.
Preferably, the earth is filled under the temporary guard piles at the temporary transportation path positions to support the temporary guard piles.
Preferably, the temporary support structure includes:
one end of each supporting column is hinged with the temporary guard pile;
the bottom plates are arranged at the bottom of the deep foundation pit, and the other ends of the support columns are slidably connected with the bottom plates through slidable structures.
Through slidable structure, be convenient for adjust the position of support column on the bottom plate in order to adjust temporary enclosure stake inclination.
Preferably, a plurality of positioning inserting rods are arranged below the bottom plate, and the positioning inserting rods are inserted into the bottom of the deep foundation pit. The positioning inserted bar is added, so that the bottom plate is prevented from sliding relative to the bottom of the deep foundation pit, and the stability of the bottom plate at the bottom of the deep foundation pit is improved.
Preferably, the slidable structure comprises:
a chute provided on the bottom plate and provided along a length direction of the bottom plate;
the sliding block is sleeved in the sliding groove in a sliding way;
the positioning structure comprises a threaded rod and a nut sleeve, wherein the nut sleeve is arranged on the bottom plate, the threaded rod is rotatably connected with the sliding block, and the threaded rod penetrates through the nut sleeve and is in threaded connection with the nut sleeve.
The position of the sliding block on the bottom plate is adjusted through rotation of the threaded rod so as to adjust the inclination angle of the temporary enclosure pile.
Preferably, clamping grooves are formed in two sides of the sliding groove, protrusions are arranged on two sides of the sliding block, and the protrusions are slidably sleeved in the clamping grooves.
Preferably, one end of the threaded rod far away from the sliding block is provided with a rotating handle.
The invention at least comprises the following beneficial effects:
firstly, the temporary guard piles are inclined to one side of the deep foundation pit, and earthwork on the small foundation pit is excavated into a gap formed by the small foundation pit and the temporary guard piles, so that the height of the earthwork of the small foundation pit is continuously reduced, the working surface above the earthwork of the small foundation pit is increased, and the excavator can conveniently work above the earthwork of the small foundation pit.
Secondly, the temporary guard piles are obliquely lowered, the earthwork of the small foundation pit is flattened, the depth of the small foundation pit is continuously lowered, and when the small foundation pit is lowered below the waist beam position of the deep foundation pit, the waist beam of the small foundation pit is constructed; continuing to incline the temporary guard pile, enabling the height of the upper surface of the small foundation pit after the earthwork is leveled to be lower than the position of the waist beam of the next deep foundation pit, constructing the waist beam of the small foundation pit, repeating the operation, and continuing to construct until the height distance between the tail end of the temporary guard pile and the bottom of the deep foundation pit is smaller than 1m.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic top view of the invention prior to excavation of a small foundation pit;
FIG. 2 is a schematic cross-sectional view of the invention prior to excavation of a small foundation pit;
FIG. 3 is a schematic cross-sectional view of a small foundation pit excavation process according to the present invention
FIG. 4 is another schematic cross-sectional view of the small pit excavation process of the present invention;
FIG. 5 is a schematic view of a temporary support structure according to the present invention;
FIG. 6 illustrates a schematic view of the temporary guard post being tilted downward without the earth being excavated to fill the gap between the temporary guard post and the small foundation pit earth;
fig. 7 illustrates a schematic view of the filling of the earth excavation after the temporary guard has fallen down to the gap between the temporary guard and the earth of the small foundation pit.
1. Deep foundation pit; 2. a small foundation pit; 3. a deep foundation pit crown beam support; 4. a small foundation pit crown beam support; 5. temporary guard piles; 6. a support column; 7. a temporary transportation path; 8. a bottom plate; 9. a slide block; 10. a chute; 11. a threaded rod; 12. a handle.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The terms "transverse," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present invention based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
As shown in fig. 1 to 7, the present invention provides a small foundation pit excavation method for a deep foundation pit which has been excavated close to each other, comprising the steps of:
1) Arranging an enclosure structure around a small foundation pit 2 to be excavated, which is adjacent to a deep foundation pit 1, and constructing a small foundation pit crown beam support 4 in the small foundation pit 2, wherein the small foundation pit crown beam support 4 is connected with the deep foundation pit crown beam support 3, namely, steel bars in the small foundation pit crown beam support 4 are connected with steel bars in the deep foundation pit crown beam support 3;
2) Cutting off a temporary crown beam support and a temporary waist beam between the deep foundation pit 1 and the small foundation pit 2 after the concrete of the small foundation pit crown beam support 4 reaches the design strength, and arranging a temporary support structure on one side of the deep foundation pit 1 to support a temporary guard pile 5 between the deep foundation pit 1 and the small foundation pit 2;
3) Removing concrete at the bottom of the temporary guard pile 5 in the deep foundation pit 1, retaining the steel bars, bending the temporary guard pile 5 at the concrete removed position to incline the temporary guard pile 5 to one side of the deep foundation pit 1, adjusting a temporary support structure to support the temporary guard pile 5, excavating earthwork in the small foundation pit 2, and backfilling the earthwork into a gap between the temporary guard pile 5 and the small foundation pit 2;
4) The temporary support structure is adjusted to enable the temporary guard piles 5 to incline to one side of the deep foundation pit 1, the earthwork in the small foundation pit 2 is excavated, the earthwork is backfilled above the temporary guard piles 5,
5) Repeating the step 4) continuously excavating until the height distance between the tail end of the temporary guard pile 5 and the bottom of the deep foundation pit 1 is smaller than 1m, constructing a temporary transportation channel 7 between the tail end of the temporary guard pile 5 and the bottom of the deep foundation pit 1, removing earthwork on the temporary guard pile 5 and the small foundation pit 2 by using a digger and a muck truck, cutting off the temporary guard pile 5, and discharging the deep foundation pit 1 in a shipping manner, so that the deep foundation pit 1 is communicated with the small foundation pit 2, and continuously excavating to a designed elevation.
According to the invention, the temporary guard piles 5 are inclined to one side of the deep foundation pit 1, the earthwork on the small foundation pit 2 is excavated into the gap formed by the small foundation pit 2 and the temporary guard piles 5, the height of the earthwork of the small foundation pit 2 is continuously reduced, and the working surface above the earthwork of the small foundation pit 2 is increased, so that the excavator can conveniently operate above the earthwork of the small foundation pit 2.
In another technical scheme, the temporary guard piles 5 are provided with inter-pile spray protection of reinforced concrete. By arranging inter-pile spraying protection, when the temporary guard piles 5 are prevented from inclining, earthwork falls from the space between the temporary guard piles 5, and the downward inclination of the temporary guard piles 5 is affected.
In another technical scheme, after the earthwork in the small foundation pit 2 is backfilled to a gap between the temporary guard pile 5 and the small foundation pit 2, the upper surface of the small foundation pit 2 is lower than the waist beam height of the deep foundation pit 1 in the deep foundation pit 1, a waist beam of the small foundation pit 2 is constructed, the waist beam of the deep foundation pit 1 is connected with the waist beam of the small foundation pit 2, after the waist beam of the small foundation pit 2 is constructed, the temporary guard pile 5 is continuously declined to enable the earthwork in the small foundation pit 2 to be backfilled to the gap, the upper surface of the small foundation pit 2 is lower than the waist beam height of the next deep foundation pit 1, the waist beam of the small foundation pit 2 is constructed, and construction is continued until the height distance between the tail end of the temporary guard pile 5 and the bottom of the deep foundation pit 1 is smaller than 1m. The temporary guard piles 5 are obliquely lowered, the earthwork of the small foundation pit 2 is flattened, the depth of the small foundation pit 2 is continuously lowered, and when the small foundation pit 2 is lowered to the position below the waist beam of the deep foundation pit 1, the waist beam of the small foundation pit 2 is constructed; continuing to incline the temporary guard piles 5, enabling the height of the upper surface of the small foundation pit 2 after the earthwork is leveled to be lower than the position of the waist beam of the next deep foundation pit 1, constructing the waist beam of the small foundation pit 2, repeating the operation, and continuing to construct until the distance between the tail end of the temporary guard piles 5 and the height of the bottom of the deep foundation pit 1 is smaller than 1m.
In another solution, the temporary transport path 7 is constructed in the middle of the small foundation pit 2. Temporary transport channels 7 are constructed in the middle positions, so that earthwork can be excavated at the two sides of the small foundation pit 2 at the same time, and the earthwork can be transported out by using a residue-soil truck.
In another solution, the space under the temporary guard piles 5 at the position of the temporary transportation path 7 is filled with earth to support the temporary guard piles 5.
In another aspect, the temporary support structure includes:
the temporary fender posts 5 are detachably hinged with the support columns 6;
the bottom plates 8 are arranged at the bottom of the deep foundation pit 1, and the other ends of the support columns 6 are slidably connected with the bottom plates 8 through slidable structures.
Through slidable structure, be convenient for adjust the position of support column 6 on bottom plate 8 in order to adjust temporary fender post 5 inclination.
In another technical scheme, a plurality of positioning inserting rods are arranged below the bottom plate 8, and the positioning inserting rods are inserted into the bottom of the deep foundation pit 1. The positioning inserted link is added, so that the bottom plate 8 is prevented from sliding relative to the bottom of the deep foundation pit 1, and the stability of the bottom plate 8 at the bottom of the deep foundation pit 1 is improved.
In another aspect, the slidable structure includes:
a chute 10 provided on the bottom plate 8 and provided along a length direction of the bottom plate 8;
a sliding block 9 which is slidably sleeved in the sliding groove 10;
the positioning structure comprises a threaded rod 11 and a nut sleeve, wherein the nut sleeve is arranged on the bottom plate 8, the threaded rod 11 is rotatably connected with the sliding block 9, and the threaded rod 11 penetrates through the nut sleeve and is in threaded connection with the nut sleeve.
By rotation of the threaded rod 11, the position of the slider 9 on the bottom plate 8 is adjusted to adjust the inclination angle of the temporary fender 5.
In another technical scheme, clamping grooves are formed in two sides of the sliding groove 10, protrusions are arranged on two sides of the sliding block 9, and the protrusions are slidably sleeved in the clamping grooves.
In another embodiment, the end of the threaded rod 11 remote from the slide 9 is provided with a turning handle 12.
In another technical scheme, the support column 6 is a hydraulic cylinder, when the temporary guard pile 5 is inclined and descends for the first time, the hydraulic cylinder contracts simultaneously to form a support for the temporary guard pile 5, after the earthwork in the small foundation pit 2 is excavated to a gap between the temporary guard pile 5 and the small foundation pit 2, the position of the sliding block 9 in the sliding groove 10 is adjusted to adjust the supporting angle of the support column 6, the hydraulic cylinder contracts to enable the temporary guard pile 5 to incline and descend to a preset angle for the second time, and the operation is repeated until the height distance between the tail end of the temporary guard pile 5 and the bottom of the deep foundation pit 1 is smaller than 1m.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. The small foundation pit excavation method for the deep foundation pit is characterized by comprising the following steps of:
1) Arranging an enclosure structure around a small foundation pit to be excavated adjacent to a deep foundation pit, and constructing a small foundation pit crown beam support in the small foundation pit, wherein the small foundation pit crown beam support is connected with the deep foundation pit crown beam support;
2) Cutting off the temporary crown beam support and the temporary waist beam between the deep foundation pit and the small foundation pit after the concrete of the crown beam support of the small foundation pit reaches the design strength, and arranging a temporary support structure on one side of the deep foundation pit to support the temporary guard piles between the deep foundation pit and the small foundation pit;
3) Removing concrete at the bottom of the temporary guard pile in the deep foundation pit, retaining the reinforcing steel bars, bending the temporary guard pile at the concrete removed position to enable the temporary guard pile to incline to one side of the deep foundation pit, adjusting a temporary support structure to support the temporary guard pile, excavating earthwork in the small foundation pit, and backfilling the earthwork into a gap between the temporary guard pile and the small foundation pit;
4) Adjusting the temporary support structure to enable the temporary guard piles to incline to one side of the deep foundation pit, and backfilling earthwork in the excavated small foundation pit above the temporary guard piles;
5) Repeating the step 4) continuously excavating until the height distance between the tail end of the temporary guard pile and the bottom of the deep foundation pit is smaller than 1m, constructing a temporary transportation channel between the tail end of the temporary guard pile and the bottom of the deep foundation pit, removing earthwork on the temporary guard pile and the small foundation pit by using an excavator and a muck truck, cutting off the temporary guard pile, hoisting and transporting the deep foundation pit, communicating the deep foundation pit with the small foundation pit, and continuously excavating to the designed elevation.
2. The method for excavating a small foundation pit adjacent to an excavated deep foundation pit according to claim 1, wherein the temporary guard piles are provided with inter-pile spray protection of reinforced concrete.
3. The method for excavating a small foundation pit adjacent to a deep foundation pit according to claim 1, wherein after the earthwork in the small foundation pit is backfilled to a gap between the temporary guard pile and the small foundation pit, the upper surface of the small foundation pit is lower than the waist beam height of the deep foundation pit in the deep foundation pit, the waist beam of the small foundation pit is constructed, the waist beam of the deep foundation pit is connected with the waist beam of the small foundation pit, the temporary guard pile is continuously declined after the waist beam of the small foundation pit is constructed, the upper surface of the small foundation pit is lower than the waist beam height of the next deep foundation pit after the earthwork in the small foundation pit is backfilled to the temporary guard pile, and the waist beam of the small foundation pit is constructed until the distance between the tail end of the temporary guard pile and the bottom of the deep foundation pit is less than 1m.
4. The method for excavation of a small foundation pit adjacent to an excavated deep foundation pit according to claim 1, wherein the temporary transportation path is constructed at an intermediate position of the small foundation pit.
5. A method of excavation of a small foundation pit which has been excavated close to a deep foundation pit as claimed in claim 1, wherein the lower part of the temporary guard post at the temporary transportation path position is filled with earth to support the temporary guard post.
6. The method for excavation of a small foundation pit adjacent to an excavated deep foundation pit according to claim 1, wherein the temporary support structure comprises:
one end of each supporting column is hinged with the temporary guard pile;
the bottom plates are arranged at the bottom of the deep foundation pit, and the other ends of the support columns are slidably connected with the bottom plates through slidable structures.
7. The method for excavating a small foundation pit adjacent to an excavated deep foundation pit according to claim 6, wherein a plurality of positioning pins are provided below the bottom plate, and the positioning pins are inserted into the bottom of the deep foundation pit.
8. The method for excavation of a small foundation pit adjacent to an excavated deep foundation pit of claim 6, wherein the slidable structure comprises:
a chute provided on the bottom plate and provided along a length direction of the bottom plate;
the sliding block is sleeved in the sliding groove in a sliding way;
the positioning structure comprises a threaded rod and a nut sleeve, wherein the nut sleeve is arranged on the bottom plate, the threaded rod is rotatably connected with the sliding block, and the threaded rod penetrates through the nut sleeve and is in threaded connection with the nut sleeve.
9. The method for excavating a small foundation pit adjacent to a deep foundation pit according to claim 8, wherein clamping grooves are formed in two sides of the sliding groove, protrusions are formed in two sides of the sliding block, and the protrusions are slidably sleeved in the clamping grooves.
10. The method for excavating a small foundation pit adjacent to an excavated deep foundation pit according to claim 8, wherein a turning handle is provided at an end of the threaded rod remote from the slider.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210619300.2A CN114960661B (en) | 2022-06-02 | 2022-06-02 | Small foundation pit excavation method for nearby deep foundation pit excavation |
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| CN202210619300.2A CN114960661B (en) | 2022-06-02 | 2022-06-02 | Small foundation pit excavation method for nearby deep foundation pit excavation |
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| EP1561874A1 (en) * | 2004-02-05 | 2005-08-10 | Euclide S.r.l. | Connecting device and node for buildings with prefabricated elements |
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| CN111877383A (en) * | 2020-07-16 | 2020-11-03 | 中铁工程设计咨询集团有限公司 | Prefabricated underground structure based on open caisson method and construction method |
| CN112281868A (en) * | 2020-10-27 | 2021-01-29 | 华南理工大学 | Support system and method combining temporary foundation pit support and permanent slope support |
| CN112459078A (en) * | 2020-11-11 | 2021-03-09 | 中国建筑第二工程局有限公司 | Construction method of foundation pit supporting system |
| CN112962626A (en) * | 2021-04-16 | 2021-06-15 | 中铁二局第一工程有限公司 | Simple shallow foundation pit supporting system and construction method |
-
2022
- 2022-06-02 CN CN202210619300.2A patent/CN114960661B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1561874A1 (en) * | 2004-02-05 | 2005-08-10 | Euclide S.r.l. | Connecting device and node for buildings with prefabricated elements |
| CN206828906U (en) * | 2017-05-27 | 2018-01-02 | 中铁第四勘察设计院集团有限公司 | A kind of temporary pavement bedding structure for Metro Deep Excavation |
| CN111877383A (en) * | 2020-07-16 | 2020-11-03 | 中铁工程设计咨询集团有限公司 | Prefabricated underground structure based on open caisson method and construction method |
| CN112281868A (en) * | 2020-10-27 | 2021-01-29 | 华南理工大学 | Support system and method combining temporary foundation pit support and permanent slope support |
| CN112459078A (en) * | 2020-11-11 | 2021-03-09 | 中国建筑第二工程局有限公司 | Construction method of foundation pit supporting system |
| CN112962626A (en) * | 2021-04-16 | 2021-06-15 | 中铁二局第一工程有限公司 | Simple shallow foundation pit supporting system and construction method |
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| CN114960661A (en) | 2022-08-30 |
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