CN105525605A - Basement backfill area reinforcing method - Google Patents
Basement backfill area reinforcing method Download PDFInfo
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- CN105525605A CN105525605A CN201410581230.1A CN201410581230A CN105525605A CN 105525605 A CN105525605 A CN 105525605A CN 201410581230 A CN201410581230 A CN 201410581230A CN 105525605 A CN105525605 A CN 105525605A
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Abstract
The invention discloses a basement backfill area reinforcing method. A foundation soil layer is provided; a backfill soil layer is laid on the foundation soil layer; a mattress layer is laid on the backfill soil layer; a reinforced concrete slab layer is arranged on the mattress layer; and a grouting column extending downwards into the foundation soil layer from the reinforced concrete slab layer is also provided. A hole is formed in the backfill soil layer and reaches the interior of the foundation soil layer, then the hole is grouted to form the grouting column, the grouting column extends upwards, the top end of the grouting column is connected with steel bars in reinforced concrete, the mattress layer is laid on the backfill soil layer and acts as a foundation of reinforced concrete, and after reinforced concrete is poured, the gravity of reinforced concrete is transferred to the foundation soil layer through the grouting column. The formation time of the foundation soil layer is long, so that no subsidence effect can be produced, and in a subsidence process of the backfill soil layer, the reinforced concrete slab layer can not subside.
Description
Technical field
The present invention relates to a kind of subterranean building body, specifically refer to the method for a kind of basement backfill region reinforcement.
Background technology
In modern architecture, deep foundation ditch or the more and more common and purposes of basement excavation also get more and more, and in current building trade, the duration of construction requirement is shorter and shorter, and large-scale basement structure all adopts foundation ditch form usually.The working procedure of lower room foundation ditch is as follows: according to engineering geology and underground hydrological situation, take dewatering measure effectively, makes excavation of foundation pit and working face reach anhydrous state, to ensure carrying out smoothly of workmanship safety and engineering; Then machinery is cut the earth, and digging depth is determined according to design, and General Requirements is to the above 30cm of substrate absolute altitude, and then artificial or machinery picks up the end, deburring; Bed course and change the construction of filling out position, as needed the construction of waterproofing course and fish tail and waterproof layer in addition; The construction of Base isolation system; Building of basement post, wall, beam, plate, the waterproof construction of body of wall and top board, finally be only the backfill construction of the peripheral foundation ditch of body of wall, for the consideration of economic factor and construction plant, backfill generally all adopts the principle fetched earth nearby, the soil that the material of backfill excavates when comprising excavation, building waste, outsourcing connect sandstone etc., generally need to be divided in the process of backfill repeatedly to tamp operation, and need regular hour sedimentation, backfill compacting again on backfill face after settling, then just can carry out ground decoration construction.But, the current construction period requires more and more tightlier or at all do not have natural subsidence process, the time that can be used for natural subsidence is fewer and feweri, in order to be delivered for use early, many engineerings have to terminate sedimentation operation in advance, if without consolidation process, after the use of blink, affect by recent fill deadweight consolidation and ground pressure, infiltration, place surface settlement is serious, and cause the completed ground decoration in local, road cracking, the surface layer having a strong impact on backfill position uses, even cause potential safety hazard with having, must be administered.
Summary of the invention
The object of the present invention is to provide a kind of basement to backfill the method for region reinforcement, solve in backfilling process and lack the surface layer subsidence problems that enough sedimentation times bring.
Object of the present invention is achieved through the following technical solutions:
A kind of method of basement backfill region reinforcement, comprise base soil layer, base soil layer is equipped with back fill course, back fill course is equipped with mattress layer, mattress layer is provided with steel concrete flaggy, also comprises the grouting post extended downward from steel concrete flaggy in base soil layer.Back fill course is holed in base soil layer, then in hole, grouting forms grouting post, grouting post upwards extends, bar connecting in its top stirrup and armored concrete slab, back fill course is laid one deck mattress layer, as supporting body and the bed die of armored concrete slab, after steel concrete is built, its gravity is passed to base soil layer mainly through grouting post, instead of by mattress layer because the formation time of base soil layer is long, obvious subsidence effect can not be produced, therefore, in the infall process of back fill course, steel concrete flaggy can not obviously sedimentation, greatly can alleviate the degree of ground deformation, in practice of construction process, according to the actual geological condition in scene, usually will with hard plastic clay or medium weathering shale layer for base soil layer, require that the stake end of grouting post enters base soil layer length and is not less than 2.00m, so, effective bottom surface settlement issues of having prevented and treated back fill course sedimentation and having brought.
Described mattress layer is made up of graded sand and stone, and its maximum particle diameter is less than 3.0cm, and mud content is less than 5%, and its thickness is 15cm ~ 25cm.Further, graded sand and stone refers to the mixed material being used for doing basis or other purposes after the granularity of sand or stone mixes according to a certain percentage, its proportioning is different according to concrete engineering design and difference to some extent, in order to better meet degree of compaction, the maximum particle diameter of graded sand and stone is less than 3.0cm, mud content is less than 5%, back fill course is laid the mattress layer that a layer thickness is 15cm ~ 25cm, after compacting, basic unit's distortion that the sedimentation that can reduce back fill course brings, provides the foundation for building of steel concrete flaggy simultaneously.
Have two-layer steel mesh reinforcement in described steel concrete flaggy, inserts is C25 concrete.Further, because steel concrete flaggy is as beaer, in use usually be subject to the effect of external force, therefore for the individual layer bar construction on superstructure roof, need the structure adopting layer cloth muscle, and its diameter is not less than Ф 14, the double-decker of upper strata cloth muscle and lower floor's cloth muscle can increase concrete shear strength and breaking resistance, not yielding.
Described grouting post is cylindrical, and its inside is provided with grouting steel pipe.Further, for the ease of the construction of the post that is in the milk, adopt columniform grouting post, column diameter is because determining according to the degree of depth and spacing, generally be not less than Ф 30, in boring to base soil layer after at least 2 meters, grouting steel pipe is put in grout hole, grouting agent is injected in grouting steel pipe, the neat slurry that the pulp material injected adopts PC42.5R high-early (strength) cement to prepare, slurry water gray scale 1:1, jet groutinl pressure is 25.00 ~ 28.00MPa, nozzle rotary speed 18 ~ 22r/min, nozzle hoisting velocity 18 ~ 25cm/min, closing on stake top 3.00m to stake top place's insertion four Ф 14 steel bar ends, its length is not less than 1 meter, and adopt multiple pressure spray process, every meter of cement consumption estimates 160kg ~ 220kg.In rotary jet grouting process, leakage amount is less than 15 ~ 20% of grouting amount for normal phenomenon, when exceeding this value, by raising expulsion pressure or the nozzle more renewing nozzle or little one-level aperture, or accelerate to rotate and hoisting velocity, to reduce leakage amount, after churning operation completes, the slurries on ground of constantly emerging should be recharged in stake holes, until the Starch Level in stake holes no longer sinks, the reinforcing bar compact siro spinning technology in the steel bar end that capital inserts and steel concrete flaggy.
Described steel concrete flaggy upper berth is provided with emmarble layer, between steel concrete flaggy and emmarble layer, be equipped with adhesive linkage.Further, as required, can establish one deck decorative layer on steel concrete flaggy upper berth, for decorative ground, itself and basement roof be connected as one, emmarble layer adopts mortar to be bonded on steel concrete flaggy.
Described adhesive linkage is cement mortar.
The present invention compared with prior art, has following advantage and beneficial effect:
The method of a kind of basement backfill of 1 the present invention region reinforcement, back fill course is holed in base soil layer, then in hole, grouting forms grouting post, grouting post upwards extends, bar connecting in its top and armored concrete slab, back fill course is laid one deck mattress layer, as the basis of steel concrete, after steel concrete is built, its gravity is passed to base soil layer by grouting post, because the formation time of base soil layer is long, can not produce obvious subsidence effect, in the infall process of back fill course, ground and decorative layer thereof are unlikely to obvious sedimentation;
The method of a kind of basement backfill of 2 the present invention region reinforcement, back fill course is laid the mattress layer that a layer thickness is 15cm ~ 25cm, after compacting, the ground deformation problem that the sedimentation that can reduce back fill course brings, simultaneously for steel concrete flaggy provides the foundation;
The method of a kind of basement backfill of 3 the present invention region reinforcement, one deck marble can be established on steel concrete flaggy upper berth, for decoration, itself and basement roof are connected as one, make the ground after backfill more smooth-going bright and clean, have more using function, emmarble layer adopts mortar to be bonded on steel concrete flaggy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Mark and corresponding component title in accompanying drawing:
1-base soil layer, 2-back fill course, 3-mattress layer, 4-steel concrete flaggy, 5-is in the milk post, 6-steel mesh reinforcement, 7-grouting steel pipe, 8-adhesive linkage, 9-emmarble layer.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the method of a kind of basement backfill of the present invention region reinforcement, comprise base soil layer 1, base soil layer 1 is equipped with back fill course 2, back fill course 2 is equipped with mattress layer 3, mattress layer 3 is made up of graded sand and stone, its maximum particle diameter is less than 3.0cm, mud content is less than 5%, its thickness is 15cm ~ 25cm, mattress layer 3 is provided with steel concrete flaggy 4, the thickness of steel concrete flaggy 4 is generally not less than 30cm, there is in steel concrete flaggy 4 two-layer steel mesh reinforcement 6, bar diameter is not less than Ф 14, inserts is C25 concrete, from steel concrete flaggy 4 extend downward in base soil layer 1 be provided with grouting post 5, grouting post 5 is cylindrical, its inside is provided with grouting steel pipe 7, in boring to base soil layer after at least 2 meters, grouting steel pipe 7 is put in the hole of grouting post 5, grouting agent is injected in grouting steel pipe 7, the neat slurry that the pulp material injected adopts PC42.5R high-early (strength) cement to prepare, slurry water gray scale 1:1, jet groutinl pressure is 25.00 ~ 28.00MPa, nozzle rotary speed 18 ~ 22r/min, nozzle hoisting velocity 18 ~ 25cm/min, closing on grouting post 5 top 3.00m to the multiple pressure spray process of grouting post 5 top place employing, every meter of cement consumption estimates 160kg ~ 220kg, in rotary jet grouting process, leakage amount is less than 15 ~ 20% of grouting amount for normal phenomenon, when exceeding this value, by raising expulsion pressure or the nozzle more renewing nozzle or little one-level aperture, or accelerate to rotate and hoisting velocity, to reduce leakage amount, after churning operation completes, should the slurries on ground of constantly emerging be recharged in stake holes, until the Starch Level in stake holes no longer sinks, steel concrete flaggy 4 can be equipped with emmarble layer 9, be equipped with adhesive linkage 8 between steel concrete flaggy 4 and emmarble layer 9, adhesive linkage 8 is the cement mortar of 1:1.
As mentioned above, just the present invention can be realized well.
Claims (6)
1. the method for a basement backfill region reinforcement, comprise base soil layer (1), base soil layer (1) is equipped with back fill course (2), it is characterized in that: on back fill course (2), be equipped with mattress layer (3), mattress layer (3) is provided with steel concrete flaggy (4), also comprises the grouting post (5) extended downward from steel concrete flaggy (4) in base soil layer (1); Back fill course is holed in base soil layer, then in hole, grouting forms grouting post, grouting post upwards extends, bar connecting in its top stirrup and armored concrete slab, back fill course is laid one deck mattress layer, as supporting body and the bed die of armored concrete slab, after steel concrete is built, its gravity is passed to base soil layer mainly through grouting post, instead of by mattress layer because the formation time of base soil layer is long, can not produce obvious subsidence effect.
2. the method for a kind of basement backfill region reinforcement according to claim 1, it is characterized in that: described mattress layer (3) is made up of graded sand and stone, and its maximum particle diameter is less than 3.0cm, and mud content is less than 5%, its thickness is 15cm ~ 25cm.
3. the method for a kind of basement backfill region reinforcement according to claim 1, is characterized in that: have two-layer steel mesh reinforcement (6) in described steel concrete flaggy (4), inserts is C25 concrete.
4. the method for a kind of basement backfill region reinforcement according to claim 1, is characterized in that: described grouting post (5) is for cylindrical, and its inside is provided with grouting steel pipe (7).
5. the method for a kind of basement backfill region reinforcement as claimed in any of claims 1 to 4, it is characterized in that: described steel concrete flaggy (4) is equipped with emmarble layer (9), between steel concrete flaggy (4) and emmarble layer (9), is equipped with adhesive linkage (8).
6. the method for a kind of basement backfill region reinforcement according to claim 5, is characterized in that: described adhesive linkage (8) is cement mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410581230.1A CN105525605A (en) | 2014-10-27 | 2014-10-27 | Basement backfill area reinforcing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410581230.1A CN105525605A (en) | 2014-10-27 | 2014-10-27 | Basement backfill area reinforcing method |
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| CN105525605A true CN105525605A (en) | 2016-04-27 |
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| CN201410581230.1A Pending CN105525605A (en) | 2014-10-27 | 2014-10-27 | Basement backfill area reinforcing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537603A (en) * | 2018-12-07 | 2019-03-29 | 天津大学 | A kind of novel backfill reinforcement means |
| CN110273339A (en) * | 2019-07-18 | 2019-09-24 | 厦门东翔工程设计有限公司 | A kind of land subsidence crack resistence structure and its construction method |
| CN111455968A (en) * | 2020-03-12 | 2020-07-28 | 浙江大学城市学院 | Anti-settlement construction method for soft soil foundation |
| CN111809599A (en) * | 2020-07-27 | 2020-10-23 | 福建兴港建工有限公司 | Foundation anti-settlement structure and construction method |
| CN111910613A (en) * | 2020-08-06 | 2020-11-10 | 佛山市佳尚居建筑装饰有限公司 | Construction method of green energy-saving building |
-
2014
- 2014-10-27 CN CN201410581230.1A patent/CN105525605A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537603A (en) * | 2018-12-07 | 2019-03-29 | 天津大学 | A kind of novel backfill reinforcement means |
| CN110273339A (en) * | 2019-07-18 | 2019-09-24 | 厦门东翔工程设计有限公司 | A kind of land subsidence crack resistence structure and its construction method |
| CN111455968A (en) * | 2020-03-12 | 2020-07-28 | 浙江大学城市学院 | Anti-settlement construction method for soft soil foundation |
| CN111809599A (en) * | 2020-07-27 | 2020-10-23 | 福建兴港建工有限公司 | Foundation anti-settlement structure and construction method |
| CN111809599B (en) * | 2020-07-27 | 2021-08-31 | 福建兴港建工有限公司 | Foundation anti-settlement structure and construction method |
| CN111910613A (en) * | 2020-08-06 | 2020-11-10 | 佛山市佳尚居建筑装饰有限公司 | Construction method of green energy-saving building |
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Application publication date: 20160427 |
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