CN218813743U - Guyed foundation pit support structure - Google Patents
Guyed foundation pit support structure Download PDFInfo
- Publication number
- CN218813743U CN218813743U CN202222809577.XU CN202222809577U CN218813743U CN 218813743 U CN218813743 U CN 218813743U CN 202222809577 U CN202222809577 U CN 202222809577U CN 218813743 U CN218813743 U CN 218813743U
- Authority
- CN
- China
- Prior art keywords
- pit
- shallow
- bottom plate
- foundation pit
- foundation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The utility model discloses a guy cable formula foundation ditch retaining structure, include: the fender post is arranged at the junction of the deep foundation pit and the shallow foundation pit, and a crown beam is arranged at the upper end of the fender post; the shallow pit bottom plate is arranged at the bottom of the shallow foundation pit; the pit bottom plate is arranged at the bottom of the pit and is connected with the fender post; and the guy cable is used for connecting the crown beam and the shallow pit bottom plate. This scheme simple structure and convenient dismantlement allow the poor department of depth foundation ditch height to take place to subside.
Description
Technical Field
The utility model relates to a building foundation ditch construction field especially relates to a guy cable formula foundation ditch retaining structure.
Background
With the rapid development of underground urban space, the excavation depth and the number of layers of the foundation pit are gradually increased, and the deep pit and the shallow pit and the pit-in-pit are more common in order to meet the requirements of different functions of the main structure of the building or the protection of the surrounding environment, while the foundation pit of the type has different local excavation depths, and a certain enclosure measure is required to be adopted at the height difference which is easily formed at the junction of the foundation pit and the pit-in-pit due to the difference of the local excavation depths.
At present, common methods for treating high-low span foundation pits in construction sites comprise slope excavation, pile arrangement cantilever support, pile support, pile anchor support and the like. The slope-releasing method is narrow in application range and only suitable for shallow foundation pits, and the method needs large backfill amount of earthwork or concrete, so that accidents such as local collapse and the like are easily caused after the earthwork is soaked in rainy days, and serious adverse effects are generated. The row pile cantilever support usually has larger enclosure deformation, and may cause certain influence on the quality of the engineering pile at a deep pit and a shallow pit due to overlarge enclosure structure deformation in a soft soil stratum, and in addition, the enclosure structure with larger height difference needs longer insertion ratio, and is unfavorable for foundation pit deformation, stability and economy. Although the pile support is favorable for deformation and stability of the foundation pit, the arrangement of the inner support results in less construction space, the operation of instruments is inconvenient, and meanwhile, the later period of the inner support needs to be dismantled and recovered, so that the whole construction cost is high. In pile anchor support, the construction of anchor cables is difficult due to the fact that the distance between engineering piles is close, the bearing capacity of the anchor cables is limited in a soft soil stratum, and the deformation control effect is poor.
In addition, the height difference position of the deep and shallow pits often needs to be provided with a settlement joint due to the difference of the main body structure, and the height difference position is allowed to have certain settlement. If directly anchor fender pile head into shallow pit bottom plate, then can lead to subsiding and warp unable emergence to lead to the bottom plate internal force too big, even the crack takes place.
For example, chinese patent publication No. CN114922199, published 2022, 08 and 19 months, entitled "construction method for deep and shallow foundation pit enclosure", includes the following steps: constructing a gravity type retaining wall at the height difference position of the deep and shallow foundation pit, and sleeving and driving a cast-in-place pile or inserting profile steel in the gravity type retaining wall; excavating the deep and shallow pits to the base of the shallow pits, and slotting the top of the cast-in-place pile or the profile steel; constructing a shallow pit bottom plate, a downward turning top beam and a horizontal support; after the shallow pit bottom plate, the downward turning and pressing top beam and the horizontal support reach the strength, excavating earthwork of a deep pit area, and performing bottom plate construction of the deep pit area; after the construction of the bottom plate of the deep pit is finished, removing the horizontal support at the junction of the deep pit and the shallow pit, pouring a deep pit structure and a floor slab upwards, and synchronously finishing the connection of the floor slab and the bottom plate of the shallow pit; and finally, building the natural terrace upwards.
The existing patents have the following disadvantages: (1) The existing foundation pit support structure is complex in arrangement structure, troublesome in later-stage dismantling, labor-consuming and high in overall construction cost; (2) The deep and shallow foundation pit juncture takes place to subside, directly anchors fender pile head into the shallow pit bottom plate among the prior art, then can lead to subsiding and warp unable emergence to lead to the bottom plate internal force too big, even take place the crack.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome current foundation ditch retaining structure and demolish the difficulty, the bottom plate easily causes fissured problem when depth foundation ditch difference in height department takes place to subside provides a guyed foundation ditch retaining structure, and simple structure and convenient the dismantlement allow depth foundation ditch difference in height department to take place to subside.
In order to realize the purpose, the utility model adopts the following technical scheme:
a guyed foundation pit support structure comprising:
the fender pile is arranged at the junction of the deep foundation pit and the shallow foundation pit, and a crown beam is arranged at the upper end of the fender pile;
the shallow pit bottom plate is arranged at the bottom of the shallow foundation pit;
the pit bottom plate is arranged at the bottom of the pit and is connected with the fender post;
and the guy cable is used for connecting the crown beam and the shallow pit bottom plate. In the scheme, the guyed foundation pit support structure replaces an inner support system and a common anchor cable system in the prior art through guys, provides enough supporting force for the foundation pit support structure, reduces the number of support structures inside the foundation pit, reserves increased construction space in the foundation pit, simplifies construction steps, shortens construction period and reduces construction cost. When the foundation pit is spanned at high and low positions, the shallow pit bottom plate is connected with the fender pile through the stay rope, the horizontal force transmission continuity of the foundation pit is guaranteed, and the structural change position of the deep and shallow pit is allowed to have certain differential settlement. The risk that the joints of the shallow pit bottom plate and the fender pile, and the deep pit bottom plate and the fender pile are cracked when the junction of the deep foundation pit and the front foundation pit is settled is prevented. And the installation and the disassembly of the inhaul cable structure are convenient.
Preferably, the inhaul cable comprises a prestress steel strand, and one end of the prestress steel strand, which is connected with the shallow pit base plate, is fixedly connected with the shallow pit bottom plate. The prestressed steel strand has the mobility, and the deformation of the enclosure structure is effectively controlled by tensioning the prestress.
Preferably, a fixed end anchor plate and a fixed end anchorage device located on the outer side of the fixed end anchor plate are sleeved at one end, connected with the shallow pit base plate, of the prestressed steel strand, and the fixed end anchorage plate is arranged in the shallow pit base plate. The anchoring reliability of the two ends of the prestressed steel strand is guaranteed, the tension performance of the steel strand is fully exerted, and the condition that the prestressed steel strand is separated from a shallow pit bottom plate when a foundation pit is greatly settled to cause the foundation pit stay cable to lose efficacy is avoided.
Preferably, one end of the prestressed steel strand connected with the crown beam is sleeved with a tensioning end anchor plate and a tensioning end anchorage device positioned on the outer side of the tensioning end anchor plate, the prestressed steel strand penetrates through the crown beam, and the crown beam is positioned between the fixed end anchor plate and the tensioning end anchor plate. The anchoring reliability of the two ends of the prestressed steel strand is guaranteed, the tension performance of the steel strand is fully exerted, and the condition that the prestressed steel strand is separated from a deep pit bottom plate when a foundation pit is greatly settled to cause the foundation pit stay cable to lose efficacy is avoided.
Preferably, a sleeve is arranged in the crown beam, the sleeve penetrates through two ends of the crown beam, and the prestressed steel strand penetrates through the sleeve. The sleeve penetrates through the crown beam and reserves a space for the extension of the prestressed steel strand.
Preferably, a plurality of steel bars are vertically arranged in the fender post, and the steel bars penetrate through the fender post and extend into the crown beam. The top beam is arranged above the fender pile and is connected with the fender pile through a steel bar vertically arranged on the fender pile, and the top beam and the fender pile are poured to form a whole.
Preferably, the shallow pit bottom plate comprises main ribs, and the fixed end anchor plate is welded with the main ribs in the shallow pit bottom plate. Limiting the anchor plate at the fixed end in the shallow pit
In the bottom plate, increase the joint strength between cable and the shallow pit bottom plate.
Preferably, the pit bottom plate is connected with the fender pile through a bottom plate force transmission belt.
Preferably, the prestressed steel strand in the inhaul cable is horizontally arranged.
The utility model discloses following beneficial effect has: simple structure and convenient dismantlement allow depth foundation ditch difference in height department to take place to subside.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the middle guy cable of the present invention.
Fig. 3 isbase:Sub>A cross-sectional view atbase:Sub>A-base:Sub>A in fig. 1.
In the figure: the fender pile comprises a fender pile 1, a crown beam 2, a shallow pit bottom plate 3, a deep pit bottom plate 4, a prestressed steel strand 5, a fixed end anchor plate 6, a fixed end anchor 7, a tensioning end anchor plate 8, a tensioning end anchor 9, a sleeve 10, a steel bar 11 and a main steel bar 12.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
A guyed foundation pit support structure comprising: the fender pile comprises fender piles 1, wherein the fender piles 1 are arranged at the junction of a deep foundation pit and a shallow foundation pit, and crown beams 2 are arranged at the upper ends of the fender piles 1; the shallow pit bottom plate 3 is arranged at the bottom of the shallow foundation pit; the pit bottom plate 4 is arranged at the bottom of the pit, and the pit bottom plate 4 is connected with the fender post 1; and the guy cable is used for connecting the crown beam 2 and the shallow pit bottom plate 3. In the scheme, the stay cable type foundation pit support structure replaces an inner support system and a common anchor cable system in the prior art through stay cables, so that sufficient supporting force is provided for the foundation pit support structure, the number of the support structures in the foundation pit is reduced, the construction space in the foundation pit is reserved to be increased, the construction steps are simplified, the construction period is shortened, and the construction cost is reduced. When the foundation pit is spanned at high and low positions, the shallow pit bottom plate 3 is connected with the fender pile 1 through a stay rope, the horizontal force transmission continuity of the foundation pit is guaranteed, and the structural change position of the deep and shallow pit is allowed to have certain differential settlement. The risk that the joints of the shallow pit bottom plate 3 and the fender post 1, the deep pit bottom plate 4 and the fender post 1 are cracked when the junction of the deep foundation pit and the front foundation pit is settled is prevented. And the installation and the disassembly of the inhaul cable structure are convenient.
According to the guyed foundation pit support structure in the embodiment, the problems that the existing foundation pit support structure is complex in structure arrangement, troublesome in later-stage dismantling, labor-consuming and high in overall construction cost are solved through the guyed structure; the deep and shallow foundation pit juncture takes place to subside, directly anchors 1 pile head of fender pile into shallow pit bottom plate 3 among the prior art, then can lead to subsiding and warp unable emergence to lead to the too big, the even problem that takes place the crack of bottom plate internal force.
As shown in fig. 1 and 2, further, the cable includes a prestressed steel strand 5, and one end of the prestressed steel strand 5 connected to the shallow pit base plate is fixedly connected to the shallow pit bottom plate 3. The prestressed steel strand 5 has mobility, and deformation of the enclosure structure is effectively controlled by tensioning the prestress. The end cover that prestressing force steel strand wires 5 and shallow pit base plate are connected is equipped with stiff end anchor plate 6, is located the stiff end ground tackle 7 in the stiff end anchor plate 6 outside, stiff end anchor plate 6 sets up in shallow pit bottom plate 3. The anchoring reliability of the two ends of the prestressed steel strand 5 is guaranteed, the tension performance of the steel strand is fully exerted, and the condition that the prestressed steel strand 5 is separated from the shallow pit bottom plate 3 when the foundation pit is greatly settled to cause the foundation pit stay cable to lose efficacy is avoided. One end cover that prestressing force steel strand wires 5 and crown beam 2 are connected is equipped with tensioning end anchor slab 8, is located the tensioning end ground tackle 9 of tensioning end anchor slab 8 outside, prestressing force steel strand wires 5 pass crown beam 2, crown beam 2 is located between stiff end anchor slab 6 and tensioning end anchor slab 8. The anchoring reliability of the two ends of the prestressed steel strand 5 is guaranteed, the tension performance of the steel strand is fully exerted, and the condition that the prestressed steel strand 5 is separated from the pit bottom plate 4 when the foundation pit is greatly settled to cause the foundation pit stay cable to lose efficacy is avoided.
As shown in fig. 1 and 2, a sleeve 10 is further arranged in the crown beam 2, the sleeve 10 penetrates through two ends of the crown beam 2, and the prestressed steel strand 5 penetrates through the sleeve 10. The sleeve 10 penetrates through the crown beam 2 and is used for enabling the prestressed steel strand 5 to stretch into a reserved space.
As shown in fig. 1, further, a plurality of steel bars 11 are vertically arranged in the fender post 1, and the steel bars 11 penetrate through the fender post 1 and extend into the crown beam 2. The top beam 2 is arranged above the fender post 1 and is connected with the fender post 1 through a vertically arranged steel bar 11 of the fender post 1 and poured to form a whole.
Further, as shown in fig. 1, the shallow pit floor 3 comprises a main rib 12, and the fixed end anchor plate 6 is welded with the main rib 12 in the shallow pit floor 3. The fixed end anchor plate 6 is limited in the shallow pit
In the bottom plate, increase the joint strength between cable and the shallow pit bottom plate 3.
Furthermore, the pit bottom plate 4 is connected with the fender pile 1 through a bottom plate force transmission belt. And the prestressed steel strand 5 in the inhaul cable is horizontally arranged.
The working process is as follows:
before carrying out foundation ditch excavation, carry out preparation work such as measurement unwrapping wire earlier, the pile driver gets into the place, and 1 pore-forming of fender pile is transferred 11 cages of reinforcing bar, pours fender pile 1, and the maintenance is to design intensity.
Excavation of the foundation pit is conducted to the shallow pit bottom plate 3, binding of the reinforcing steel bars 11 of the shallow pit bottom plate 3 is conducted, the fixed end anchor plate 6 is welded with the main reinforcing steel bars 12 in the shallow pit bottom plate 3, and the prestressed steel strands 5 penetrate through the fixed end anchor plate 6 and are fixed through the fixed end anchor 7.
Performing formwork pouring on the crown beam 2 and embedding a sleeve 10, after the crown beam 2 is cured to the design strength, penetrating the right end of the prestressed steel strand 5 into the sleeve 10, sleeving a tensioning end anchor plate 8 and a tensioning end anchor 9, and fixing; and tensioning the prestressed steel strand 5 at the tensioning end anchorage device 9 end, locking the fixed end anchorage device 7 after tensioning to the design requirement, and trimming the prestressed steel strand 5 to a proper length.
And (3) excavating pit earthwork to reach the elevation of the pit bottom plate 4, binding and pouring (including a bottom plate force transmission belt) reinforcing steel bars 11 of the pit bottom plate 4, maintaining until the design strength is reached, unlocking the tensioning end anchorage device 9, disassembling the tensioning end anchorage plate 8, shearing the prestressed steel strands 5 and disassembling the crown beam 2.
And after the crown beam 2 is removed, constructing the floor slab with the same elevation as the shallow pit bottom plate 3, and connecting the floor slab with the shallow pit bottom plate 3.
The above embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto. All equivalent changes made according to the shape and structure of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a stay cord formula foundation ditch envelope which characterized in that includes:
the fender pile is arranged at the junction of the deep foundation pit and the shallow foundation pit, and a crown beam is arranged at the upper end of the fender pile;
the shallow pit bottom plate is arranged at the bottom of the shallow foundation pit;
the pit bottom plate is arranged at the bottom of the pit and is connected with the fender post;
and the guy cable is used for connecting the crown beam and the shallow pit bottom plate.
2. The guyed foundation pit support structure of claim 1, wherein the guy comprises a pre-stressed steel strand, and one end of the pre-stressed steel strand connected with the shallow pit base plate is fixedly connected with the shallow pit bottom plate.
3. The guyed foundation pit support structure of claim 2, wherein a fixed end anchor plate and a fixed end anchor positioned outside the fixed end anchor plate are sleeved at one end of the prestressed steel strand connected with the shallow pit base plate, and the fixed end anchor plate is arranged in the shallow pit base plate.
4. A guyed foundation pit enclosure structure as claimed in claim 2 or claim 3, wherein the prestressed steel strands are threaded through the crown beam, and the crown beam is located between the fixed end anchor slab and the tension end anchor slab.
5. The guyed pit support structure of claim 3, wherein a sleeve is arranged in the crown beam, the sleeve penetrates through two ends of the crown beam, and the prestressed steel strand penetrates through the sleeve.
6. A guyed pit enclosure according to claim 1 or claim 5, wherein a plurality of reinforcing bars are provided vertically within the enclosure, said reinforcing bars extending through the enclosure and into the top beams.
7. A guyed foundation pit support structure according to claim 3 or claim 5, wherein the shallow pit floor comprises a main reinforcement, and the fixed end anchor plate is welded to the main reinforcement in the shallow pit floor.
8. A guyed pit enclosure according to claim 1, 2, 3 or 5 in which the pit floor and fender post are connected by floor force straps.
9. A bracing cable type foundation pit support structure according to claim 2, 3 or 5, wherein the prestressed steel strands in the bracing cable are horizontally arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222809577.XU CN218813743U (en) | 2022-10-24 | 2022-10-24 | Guyed foundation pit support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222809577.XU CN218813743U (en) | 2022-10-24 | 2022-10-24 | Guyed foundation pit support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218813743U true CN218813743U (en) | 2023-04-07 |
Family
ID=87255281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222809577.XU Active CN218813743U (en) | 2022-10-24 | 2022-10-24 | Guyed foundation pit support structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218813743U (en) |
-
2022
- 2022-10-24 CN CN202222809577.XU patent/CN218813743U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102828518A (en) | Manual hole digging support pile prestress anchor cable anchoring structure and construction method of anchoring structure | |
| CN111560962A (en) | Backfill area foundation pit supporting structure and construction method thereof | |
| CN109944593B (en) | Reinforcing method for shield tunnel to penetrate existing building | |
| CN107044142B (en) | Adjustable reinforcement deviation correcting method and structure for reducing uneven settlement of house | |
| CN110777802A (en) | Deep foundation pit high-low span supporting structure and construction method thereof | |
| CN111395358A (en) | Novel support system for double-row pile vertical-blocking cross anchor and construction method thereof | |
| CN112095656A (en) | Tension-compression combined type prestressed anchor cable retaining wall structure | |
| CN109024632A (en) | A kind of the precast lattice beam structure and assembly monolithic construction method of slope reinforcement | |
| CN108914945A (en) | A kind of deep basal pit pile for prestressed pipe, prestress anchorage cable combined supporting construction method | |
| CN113417300B (en) | Slope support system and construction method thereof | |
| CN210766861U (en) | Portal formula building pile foundation underpins structure under narrow and small space | |
| CN218813743U (en) | Guyed foundation pit support structure | |
| CN111608196A (en) | Tunnel type pile foundation bearing platform combined anchorage structure and installation method thereof | |
| CN111794245A (en) | Deep foundation pit supporting structure utilizing existing underground structure and construction method | |
| CN217204165U (en) | Assembled anchor rod frame beam | |
| CN112813984B (en) | Deep foundation pit construction method under complex geological condition | |
| CN212561538U (en) | Novel supporting system for double-row pile vertical-blocking cross anchor | |
| CN210033432U (en) | Reinforcing structure for shield tunnel to penetrate existing building | |
| CN208857826U (en) | A kind of precast lattice beam structure of slope reinforcement | |
| CN105464128A (en) | Assembly-type protective construction method for slab-pile wall through pre-stressed anchor cables | |
| CN218813754U (en) | Foundation pit support reinforcing and treating structure after service life is expired | |
| CN218175854U (en) | M-shaped wall foundation pit supporting structure using transverse single-width underground continuous wall as counterfort | |
| CN216075270U (en) | Anti installation coupling assembling that floats of newly-built basement | |
| CN220565238U (en) | Pile anchor and inner support combined supporting system suitable for large-height-difference deep foundation pit | |
| CN214783988U (en) | Prestressed pipe pile reinforcement cushion layer combined foundation pit supporting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |