CN209277170U - A kind of foundation ditch strengthening structure - Google Patents
A kind of foundation ditch strengthening structure Download PDFInfo
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- CN209277170U CN209277170U CN201822185924.XU CN201822185924U CN209277170U CN 209277170 U CN209277170 U CN 209277170U CN 201822185924 U CN201822185924 U CN 201822185924U CN 209277170 U CN209277170 U CN 209277170U
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- foundation pit
- wall
- reinforcing body
- foundation
- soil
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Abstract
The purpose of this utility model be soft clay area deep basal pit to be solved, underground close to the more complex underground engineering Improvement of Soil And Lateral Deformation of Retaining Wall such as adjacent buildings big, surface subsidence and a kind of foundation ditch strengthening structure provided the problems such as bottom heave, including foundation pit side-wall, side wall supports, anchor cable, hole bottom reinforcing body, reinforcing body supporter, wherein foundation pit side-wall is disposed around foundation pit surrounding, side wall supports are located on the outside of foundation pit side-wall in the soil body, and anchor cable passes through foundation pit side-wall and side wall supports are deep into the soil body outside foundation pit；Hole bottom reinforcing body is located at bottom of foundation ditch surrounding, is located on the inside of foundation pit side-wall, and reinforcing body supporter is located at bottom of foundation ditch, positioned at the inside of hole bottom reinforcing body.The utility model pile density is high, globality is stronger, the problems such as foundation ditch strengthening effect significantly improves, and effectively solves soft clay area deep basal pit, underground big close to the more complex underground engineering Improvement of Soil And Lateral Deformation of Retaining Wall such as adjacent buildings, building enclosure insertion depth deficiency, surface subsidence and bottom heave.
Description
Technical field
The utility model relates to building field, in particular to a kind of foundation ditch strengthening structure.
Background technique
In order to make full use of the underground space in current city construction, foundation pit scale is increasing, and earth excavation the more digs the more deep,
And there is considerable part underground close to adjacent buildings, therefore the influence of stabilization and ambient enviroment and structures safety to foundation pit
It is increasing.
Especially when in foundation pit the soil body be that more complex there are soft for the soft modeling such as weak soil, backfill or half-flow plastic soil layer or clay distribution
When weak subjacent bed, since the mechanical index such as its internal friction angle and cohesive strength are very low, its influence is not such as considered, design of foundation pit is improper,
It easily causes excessive Improvement of Soil And Lateral Deformation of Retaining Wall, surrounding surface subsidence and bottom heave, and then influences the stabilization of foundation pit and neighbouring set
The safety and normal use applied.There are biggish water-head and soil pressure poor before and after foundation pit enclosure wall under normal circumstances, wall is not
Very greatly, near excavation face and excavation cheats bottom position certain depth region for lateral deformation and lateral pressure coefficient variation with depth
Deformation of wall is larger, and the soil body compression of corresponding position is also larger；Again since the infiltration coefficient of weak soil is smaller, rate of consolidation is slow, such as
Rate of constructing is very fast, be easy to cause the biggish plasticity developing area in part, makes that foundation pit enclosure deformation sharply increases or adjacent building produces
Raw serious uneven subsidence；Other as cohesive soil foundation pit construction, if foundation pit for a long time exposure, then because of the rheological characteristic of cohesive soil
By displacement of the soil body into hole outside the soil deformation and wall that increase wall passive pressure area, and then increase the sedimentation of the outer earth's surface of wall.
Interior precipitation is used when furthermore excavating, makes to cheat outer water level and changes, and so that the soil body is generated displacement, be influenced the peace of structures around
Entirely.
Summary of the invention
The purpose of this utility model is soft clay area deep basal pit to be solved, the underground ground more complex close to adjacent buildings etc.
Lower engineering Improvement of Soil And Lateral Deformation of Retaining Wall is big, building enclosure insertion depth is insufficient, surface subsidence and provides the problems such as bottom heave
A kind of foundation ditch strengthening structure.
The utility model includes foundation pit side-wall, side wall supports, anchor cable, cheats bottom reinforcing body, reinforcing body supporter, wherein base
Hole side wall is disposed around foundation pit surrounding, and side wall supports are located on the outside of foundation pit side-wall in the soil body, and anchor cable passes through foundation pit side-wall and side wall
Supporter is deep into the soil body outside foundation pit；Hole bottom reinforcing body is located at bottom of foundation ditch surrounding, is located on the inside of foundation pit side-wall, reinforcing body
Supporter is located at bottom of foundation ditch, positioned at the inside of hole bottom reinforcing body；The hole bottom reinforcing body is by several vertical cement mixing piles
Composition, cement mixing pile is closely coupled, and overlap overlap joint between the cement mixing pile that is connected, and the diameter of cement mixing pile is
200mm~300mm, the lap width of adjacent cement mixing pile are 50mm~100mm.
The side wall supports are that the brick mix structure that several layers of vertical cross-section are right-angled trapezium is formed by stacking；The reinforcing
Body supporter is that the brick mix structure that several layers of vertical cross-section are right-angled trapezium is formed by stacking.
Working principle of the utility model is:
The foundation pit side-wall gets up foundation pit enclosure, and the soil body for preventing foundation pit lateral collapses into hole bottom, is also prevented from hole
The building of weak soil basis flow effect foundation pit periphery consolidates；Side wall supports are used to support foundation pit side-wall, and anchor cable is for drawing
Pulling foundation pit side-wall prevents it tilted to foundation pit, while the soil body outside foundation pit side-wall, side wall supports and foundation pit is formed one
It is whole, improve the lateral stabilization of foundation pit.
Hole bottom one circle hole bottom reinforcing body is used to reinforce the soft soil foundation of bottom of foundation ditch, reduces hole bottom weak soil to foundation pit side-wall
Extruding force prevents underground engineering Improvement of Soil And Lateral Deformation of Retaining Wall, and reinforcing body supporter is reinforced for reinforcing hole bottom reinforcing body for hole bottom
Body provides support force, prevents hole bottom reinforcing body to be squeezed and protuberance or sedimentation deformation occurs.
The working principle and beneficial effect of the utility model:
The utility model goes along with sb. to guard him into degree height, and globality is stronger, and foundation ditch strengthening effect significantly improves, effectively solution soft clay area
Deep basal pit, underground are big close to the more complex underground engineering Improvement of Soil And Lateral Deformation of Retaining Wall such as adjacent buildings, building enclosure insertion is deep
The problems such as degree deficiency, surface subsidence and bottom heave.
Detailed description of the invention
Fig. 1 is this practical overall structure diagram.
Fig. 2 is the utility model cement mixing pile construction flow chart.
Fig. 3 is that the utility model cement mixing pile overlaps schematic diagram.
Fig. 4 is the cement mixing pile arrangement schematic diagram that the utility model cheats bottom reinforcing body.
1, foundation pit side-wall 2, side wall supports 3, anchor cable 4, hole bottom reinforcing body 5, reinforcing body supporter 6, cement mixing
Stake.
Specific embodiment
Shown in please referring to Fig.1 to Fig.4:
The utility model includes foundation pit side-wall 1, side wall supports 2, anchor cable 3, cheats bottom reinforcing body 4, reinforcing body supporter 5,
Wherein foundation pit side-wall 1 is disposed around foundation pit surrounding, and side wall supports 2 are located in the 1 outside soil body of foundation pit side-wall, and anchor cable 3 passes through foundation pit
Side wall 1 and side wall supports 2 are deep into the soil body outside foundation pit；Hole bottom reinforcing body 4 is located at bottom of foundation ditch surrounding, is located at foundation pit side
The inside of wall 1, reinforcing body supporter 5 are located at bottom of foundation ditch, positioned at the inside of hole bottom reinforcing body 4；The hole bottom reinforcing body 4 by
Several vertical cement mixing piles 6 form, and cement mixing pile 6 is closely coupled, and overlap overlap joint between the cement mixing pile 6 that is connected,
The diameter of cement mixing pile 6 is 200mm~300mm, and the lap width of adjacent cement mixing pile 6 is 50mm~100mm.
The side wall supports 2 are that the brick mix structure that several layers of vertical cross-section are right-angled trapezium is formed by stacking；Described adds
Solid support 5 is that the brick mix structure that several layers of vertical cross-section are right-angled trapezium is formed by stacking.
Working principle of the utility model is:
The foundation pit side-wall 1 gets up foundation pit enclosure, and the soil body for preventing foundation pit lateral collapses into hole bottom, is also prevented from hole
The building of weak soil basis flow effect foundation pit periphery consolidates；Side wall supports 2 are used to support foundation pit side-wall 1, and anchor cable 3 is used for
Pullling foundation pit side-wall 1 prevents it tilted to foundation pit, while foundation pit side-wall 1, side wall supports 2 and the soil body outside foundation pit being formed
One entirety improves the lateral stabilization of foundation pit.
The hole bottom reinforcing body 4 that hole bottom one is enclosed is used to reinforce the soft soil foundation of bottom of foundation ditch, reduces hole bottom weak soil to foundation pit side
The extruding force of wall 1, prevents underground engineering Improvement of Soil And Lateral Deformation of Retaining Wall, and reinforcing body supporter 5 is for reinforcing hole bottom reinforcing body 4
It cheats bottom reinforcing body 4 and support force is provided, prevent hole bottom from reinforcing 4 bodies and being squeezed and protuberance or sedimentation deformation occurs.
Construction method includes the following steps:
Foundation pit has first been dug, side wall supports 2 have been built in foundation pit surrounding, in 2 inner ring pouring reinforcement concrete of side wall supports
The foundation pit side-wall 1 of structure sequentially passes through anchor cable 3 in foundation pit side-wall 1 and the drilling to the soil body on the outside of foundation pit of side wall supports 2；?
Groove is excavated in bottom of foundation ditch border, first builds reinforcing body supporter 5, then be perfused between reinforcing body supporter 5 and foundation pit side-wall 1
Bottom reinforcing body 4 is cheated, the construction method of the hole bottom reinforcing body 4 is as follows:
Step 1: stake position ground, underground every obstacle object are removed in smooth mixing pile construction place；
Step 2: the setting-out of stake position, poke hole positioning, make each position, wherein stake holes diameter take 200mm~
300mm, the lap of splice of adjacent studs are 50mm~100mm, and the verticality of stake is not more than 1/100；
Step 3: positioning drilling machine according to layout point, drill bit face stake position center, examines, adjustment drilling machine, drilling machine guide pile
Position unwrapping wire error is less than 5cm, after unwrapping wire positioning review is qualified, starts drilling machine direct circulation drilling and forming hole, depth is greater than projected depth
0.5m, the error of perpendicularity is less than 1.5%；Open high-pressure injection pump, reacting cycle mention brill and water-spray type slurry, until working standard face with
Under, it repeats to stir lower drilling to completion, reacting cycle mentions brill and water-spray type slurry is to earth's surface, repeats to stir lower drilling to completion three
At/mono-, reacting cycle proposes that drill bit, pile terminate, and mobile drill prepares next pile of constructing.
In step 3, before cement mixing pile 6 spuds in, entire pipeline should be washed with water and examined existing whether there is or not blocking in pipeline
As after water drains, doing whitewashing experiment, spray pressure can descend to bore after meeting design requirement.
In step 3, after pile, emphasis, which is cement consumption, water, to be checked to every molding stirring quality of pile
Whether tank number, the mud jacking of mud mixing have disconnected slurry phenomenon, whitewashing stirring promotion time in the process and stir number again, carry out benefit slurry
Recharge guarantees the stake top absolute altitude after reinforcing, and carries out waste pulp processing work.
In step 3, bored pile is carried out using three axis cement mixing pile machines, cement mixed weight is not less than 360kg/m3, water
The 28d age unconfined compressive strength that soil is reinforced is not less than 1MPa.
In step 3, slurries paddling process can be replaced using powder spray mixing method, i.e., is sprayed in drilling machine drilling programme
It penetrates cement powder and foundation soil stirs pile.
Claims (2)
1. a kind of foundation ditch strengthening structure, it is characterised in that: including foundation pit side-wall (1), side wall supports (2), anchor cable (3), hole bottom
Reinforcing body (4), reinforcing body supporter (5), wherein foundation pit side-wall (1) is disposed around foundation pit surrounding, and side wall supports (2) are located at foundation pit
On the outside of side wall (1) in the soil body, anchor cable (3) passes through foundation pit side-wall (1) and side wall supports (2) are deep into the soil body outside foundation pit；
Hole bottom reinforcing body (4) is located at bottom of foundation ditch surrounding, is located at the inside of foundation pit side-wall (1), and reinforcing body supporter (5) is located at foundation pit bottom
Portion is located at the inside in hole bottom reinforcing body (4)；The hole bottom reinforcing body (4) is made of several vertical cement mixing piles (6), water
Mud mixing pile (6) is closely coupled, and overlap overlap joint between connected cement mixing pile (6), and the diameter of cement mixing pile (6) is
200mm~300mm, the lap width of adjacent cement mixing pile (6) are 50mm~100mm.
2. a kind of foundation ditch strengthening structure according to claim 1, it is characterised in that: the side wall supports (2) are number
Layer vertical cross-section is that the brick mix structure of right-angled trapezium is formed by stacking；The reinforcing body supporter (5) is that several layers of vertical cross-section are
The brick mix structure of right-angled trapezium is formed by stacking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822185924.XU CN209277170U (en) | 2018-12-25 | 2018-12-25 | A kind of foundation ditch strengthening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822185924.XU CN209277170U (en) | 2018-12-25 | 2018-12-25 | A kind of foundation ditch strengthening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209277170U true CN209277170U (en) | 2019-08-20 |
Family
ID=67606949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822185924.XU Active CN209277170U (en) | 2018-12-25 | 2018-12-25 | A kind of foundation ditch strengthening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209277170U (en) |
-
2018
- 2018-12-25 CN CN201822185924.XU patent/CN209277170U/en active Active
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