CN104652416A - Construction method for strengthening base layer soil body under floor cushion layer - Google Patents
Construction method for strengthening base layer soil body under floor cushion layer Download PDFInfo
- Publication number
- CN104652416A CN104652416A CN201510100345.9A CN201510100345A CN104652416A CN 104652416 A CN104652416 A CN 104652416A CN 201510100345 A CN201510100345 A CN 201510100345A CN 104652416 A CN104652416 A CN 104652416A
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- terrace
- bed course
- base layer
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- floor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a construction method for strengthening a base layer soil body under a floor cushion layer, belongs to the technical field of building construction, and aims to solve the problem that the floor construction quality is affected since no floor pile is available on a floor of an industrial workshop or warehouse and the base layer soil body under the floor cushion layer partially settles and sinks. The construction method comprises the following steps: firstly selecting a plurality of grouting points on the floor cushion layer and marking; then forming grouting holes at the grouting points and laying grouting pipes; next preparing slurry for later use; next injecting slurry into the grouting holes through the grouting pipes; finally removing the grouting pipes and plugging the grouting holes. According to the construction method, points are arranged in blocks on the floor cushion layer for grouting to form grouting buttresses to support each floor unit, so the carrying capacity and the compactness of the base layer soil body under the floor are improved, and a gap between the floor cushion layer and the base layer soil body is effectively filled; thus settlement produced by factors such as insufficient bearing capacity or non-compactness of the base layer soil body under the floor is effectively prevented, and the construction quality of the floor is guaranteed.
Description
Technical field
The present invention relates to technical field of building construction, be specifically related to a kind of construction method of terrace bed course underlying base layer soil stabilization.
Background technology
Usually, one deck terrace actual use carrying of factory building or depot establishment is relatively high, and when not arranging terrace stake in the basic unit's soil body below terrace, the carrying of this one deck terrace relies on the compactness of basic unit's soil body completely.And the basic unit's soil body be positioned at below terrace bed course carried out excavation when foundation construction, although backfill time carried out the treatment measures such as compaction in layers, its compactness inevitably reduces, and at an upper portion thereof structure construction time, built terrace bed course.During this Superstructure Construction, using terrace bed course as framed bent basic unit, when constructing to one deck terrace, the construction of distance terrace bed course is separated by the long period, local terrace bed course there will be the situation of sinking, depression, and the basic unit's soil body sedimentation situation below terrace bed course cannot clearly be grasped.Therefore, before the construction carrying out one deck terrace, for the basic unit's soil body below the terrace bed course of having constructed, provide a kind of and carry out reinforcing closely knit construction method to this basic unit's soil body, thus ensure that floor construction quality is the technical problem that those skilled in the art need solution badly.
Summary of the invention
The object of the present invention is to provide a kind of construction method of terrace bed course underlying base layer soil stabilization, to solve industrial premises or warehouse terrace does not have terrace stake, there is sedimentation, depression in terrace bed course underlying base layer soil body part, thus affects the problem of floor construction quality.For solving the problems of the technologies described above, the invention provides and a kind ofly can improve the bearing capacity of the terrace bed course underlying base layer soil body and the reinforced construction method of compactness.
To achieve these goals, technical scheme of the present invention is:
A construction method for terrace bed course underlying base layer soil stabilization, cast-in-place terrace above described terrace bed course, described terrace comprises some terrace unit, is provided with parting seam, comprises the steps: between adjacent described terrace unit
Step one, described terrace bed course below each described terrace unit to be built choose some slip casting point, and marks;
Step 2, offer injected hole at described slip casting point place, described injected hole bottom is goed deep in the old soil of the described basic unit soil body, and lays Grouting Pipe in described injected hole;
Step 3, prepared slarry;
Step 4, by described Grouting Pipe, described slurries are injected in described injected hole;
Step 5, pull out described Grouting Pipe and injected hole described in shutoff.
Further, the described slip casting point in described terrace unit is five, and four of terrace bed course corresponding below terrace unit to be built described in described five slip casting points are arranged at respectively on angle point and central point.
Further, paint is adopted to mark described slip casting point in described terrace mat surface in described step one.
Further, the described injected hole degree of depth at described five slip casting point places is consistent.
Further, described in every root, Grouting Pipe design bearing pressure is 0.2 ~ 0.3MPa, and described in every root, the grouting amount of Grouting Pipe is not less than 0.8t.
Further, described step 2 is also included on described bed course unit and offers detect aperture.
Further, described slurries comprise cement and water, and the water/binder ratio of described slurries is 0.55 ~ 0.60.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention: the construction method of terrace bed course underlying base layer soil stabilization of the present invention, first on terrace bed course, chooses some slip casting point, and marks; Then injected hole is offered at slip casting point place, and corresponding laying Grouting Pipe; Then prepared slarry is for subsequent use; Then by Grouting Pipe, slurries are injected in injected hole; Finally pull out Grouting Pipe and shutoff injected hole.By such construction method, on terrace bed course, piecemeal sets up an office slip casting, form slip casting buttress, support each terrace unit, improve the basic unit's soil bearing capacity below terrace and compactness, effectively fill up the gap between terrace bed course and basic unit's soil body, thus effectively prevent terrace because its underlying base layer soil bearing capacity is not enough or the factor such as leakiness and the sedimentation that produces, ensure that the construction quality of terrace.
Accompanying drawing explanation
Fig. 1 is the position view of slip casting point on terrace bed course in the construction method of terrace bed course underlying base layer soil stabilization provided by the invention.
In figure, 10-terrace unit, 11-parting seam;
20-terrace bed course, 21-injected hole, 22-detect aperture.
Detailed description of the invention
Be described in further detail below in conjunction with the construction method of the drawings and specific embodiments to the terrace bed course underlying base layer soil stabilization that the present invention proposes.According to the following describes and claims, advantages and features of the invention will be clearer.Need to illustrate in addition, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.For sake of convenience, hereinafter described " on ", D score is consistent with the upper and lower direction of accompanying drawing, but this can not become the restriction of technical solution of the present invention.
Embodiment one
This engineering is factory building, and one deck terrace actual use carrying is higher, but does not design terrace stake below one deck terrace, and this just requires that the basic unit's soil body below one deck terrace has good compactness.But, when excavating and build terrace cushion construction, excavation disturbance has been in one end that the basic unit's soil body below terrace bed course is close to terrace bed course, compared with the basic unit's soil body not having excavation disturbance to cross with other, the compactness of the soil body be disturbed declines, and bearing capacity and anti-settling ability also decline thereupon.In this engineering, need terrace bed course of first constructing, then utilize terrace bed course as framed bent base layer construction superstructure, after Superstructure Construction completes, then terrace of constructing, otherwise can damage terrace in Superstructure Construction process.But because the duration of superstructure is longer, construction one deck terrace is separated by half a year with construction terrace bed course, and local terrace bed course has occurred sinking, the situation of depression.Therefore, in order to ensure the construction quality of terrace, need the basic unit's soil body below to terrace bed course to reinforce.
Below in conjunction with Fig. 1, describe the construction method of terrace bed course underlying base layer soil stabilization of the present invention in detail.
As shown in Figure 1, by cast-in-situ concrete above terrace bed course 20 in the present embodiment, form terrace.Terrace comprises some terrace unit 10, is provided with parting seam 11 between adjacent terrace unit 10.The construction method of terrace bed course underlying base layer soil stabilization of the present invention, specifically comprises the steps:
S101: the terrace bed course 20 below each terrace unit 10 to be built chooses some slip casting point, and marks.
S102: place offers injected hole 21 at slip casting point, going down to the grass-roots units in the old soil of the soil body in injected hole 21 bottom, and lays Grouting Pipe in injected hole 21.
S103: prepared slarry.
S104: slurries are injected in injected hole 21 by Grouting Pipe.
S105: pull out Grouting Pipe and shutoff injected hole 21.
Specifically, need in factory building, warehouse etc. large area to build in the construction of terrace, in order to avoid terrace cracking, ensure good ground rigid waterproofing effect, parting seam 11 is artificially set.Parting seam 11 method to set up is by design and construction ground, reaches after final set, by the lattice requirement bullet line of ink marker, use cutter special joint-cutting, meet dark 50mm, fill out the pitch cementation of fissures until concrete strength.In the present embodiment, one deck terrace way is the C30 steel concrete that 200mm is thick, and (diameter is the reinforcing bar of 12mm inside to join f12@200, according to spacing 200mm tiling) double-layer double-direction reinforcing bar, Eloor Design carrying 20 ~ 50KPa, parting seam divides according to axis, average headway about 15 meters.The reinforcement measure taked in the present embodiment is mainly by slip casting in basic unit's soil body of setting up an office below terrace bed course 20, slip casting buttress is formed at each slip casting point place, prevent terrace from producing differential settlement by the acting in conjunction of all slip casting buttresses, thus improve the bearing capacity of terrace.That is, by some slip casting buttresses cast-in-place on terrace bed course 20, each slip casting buttress runs through terrace bed course and gos deep into the method in the old soil (not having the soil body of disturbance in the basic unit's soil body below terrace bed course 20) of the basic unit's soil body below terrace bed course 20, reaches and prevents terrace from producing crack because of differential settlement and the object ensureing terrace bearing capacity.
In order to form uniform slip casting buttress, before slip casting, the terrace bed course 20 first below each terrace unit 10 to be built choosing some slip casting point, and marks.Then, offering injected hole 21 in the slip casting point place correspondence carrying out mark, goes down to the grass-roots units in the old soil of the soil body in the bottom of injected hole.Thickness due to terrace is set, and the degree of depth of injected hole 21 is also set, and so the grouting amount of the aperture of injected hole 21 mainly required for each slip casting buttress is determined.In order to not affect the duration, after having offered injected hole 21, in each injected hole 21, lay Grouting Pipe in time, and it is for subsequent use to make slurries.Then the slurries prepared are injected in each injected hole 21 by Grouting Pipe.Often complete the slip casting work of an injected hole 21, the Grouting Pipe in this injected hole will be pulled out in time, and complete the shutoff of this injected hole 21 in time.
Preferably, the while of considering cost-effective, reach and reinforce closely knit effect preferably, terrace bed course 20 below each terrace unit to be built evenly lays five slip casting points, five slip casting points are arranged on terrace bed course 20, and five slip casting points are uniformly distributed in four of each terrace unit 10 place to be built on angle point and central point.That is, with parting seam 11 for boundary, by terrace people for being divided into some terrace unit 10, the terrace bed course 20 of each terrace unit 10 correspondence is all established five slip casting points.Certainly, when arranging slip casting point, Reference Design drawing, avoiding cushion cap position.After having chosen slip casting point, slip casting point can be marked by paint, pigment pen etc. on terrace bed course 20.Then, offer the consistent injected hole of the degree of depth 21 at each slip casting point place, to pass through the consistent slip casting buttress of subsequent handling slip casting height of formation, good supporting role is formed to terrace.
When laying Grouting Pipe, according to Force Calculation, in order to prevent jack-up terrace bed course 20, affect the stability of terrace bed course 20, every root Grouting Pipe design bearing pressure is 0.2 ~ 0.3MPa, and the grouting amount of every root Grouting Pipe is not less than 0.8t.Especially, in order to prevent, slip casting is not enough or slip casting is excessive, the terrace bed course 20 of each terrace unit 10 correspondence offers 1 ~ 2 detect aperture 22, in order to observe the closely knit situation of slip casting of the basic unit's soil body below terrace bed course 20.
Certainly, in order to reach the closely knit effect of good slip casting, the making of slurries is also very crucial.In the present embodiment, the slurries of grouting adopt straight cement, and water/binder ratio controls between 0.55 ~ 0.60.When slurries make, in agitator, add cement and water in proportion, and stir, in order to form uniform and stable slurries, mixing time is no less than 2 minutes.Observe the closely knit situation of slip casting by detect aperture 22, complete the slip casting work at each injected hole 21 place, form slip casting buttress, and shutoff detect aperture 22.Like this, in the construction method of the terrace bed course underlying base layer soil stabilization of the present embodiment, slip casting buttress is defined below each terrace unit 10, support terrace unit, both avoided terrace underlying base layer soil body leakiness and caused the defect of terrace sedimentation, having turn improved the bearing capacity of the terrace entirety that terrace unit is formed.
In sum, the construction method of terrace bed course underlying base layer soil stabilization provided by the invention, before floor construction, to be set up an office slip casting by piecemeal on terrace bed course, form slip casting buttress, support each terrace unit, improve the basic unit's soil bearing capacity below terrace and compactness, effectively fill up the gap between terrace bed course and basic unit's soil body, thus the sedimentation preventing terrace from producing because of its factor such as underlying base layer soil bearing capacity deficiency or leakiness, ensure that the construction quality of terrace.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (7)
1. a construction method for terrace bed course underlying base layer soil stabilization, cast-in-place terrace above described terrace bed course, described terrace comprises some terrace unit, is provided with parting seam, it is characterized in that, comprise the steps: between adjacent described terrace unit
Step one, described terrace bed course below each described terrace unit to be built choose some slip casting point, and marks;
Step 2, offer injected hole at described slip casting point place, described injected hole bottom is goed deep in the old soil of the described basic unit soil body, and lays Grouting Pipe in described injected hole;
Step 3, prepared slarry;
Step 4, by described Grouting Pipe, described slurries are injected in described injected hole;
Step 5, pull out described Grouting Pipe and injected hole described in shutoff.
2. the construction method of terrace bed course underlying base layer soil stabilization as claimed in claim 1, it is characterized in that, described slip casting point in described terrace unit is five, and four of terrace bed course corresponding below terrace unit to be built described in described five slip casting points are arranged at respectively on angle point and central point.
3. the construction method of terrace bed course underlying base layer soil stabilization as claimed in claim 1, adopts paint to mark described slip casting point in described terrace mat surface in described step one.
4. the construction method of terrace bed course underlying base layer soil stabilization as claimed in claim 2, the described injected hole degree of depth at described five slip casting point places is consistent.
5. the construction method of terrace bed course underlying base layer soil stabilization as claimed in claim 1, is characterized in that, described in every root, Grouting Pipe design bearing pressure is 0.2 ~ 0.3MPa, and described in every root, the grouting amount of Grouting Pipe is not less than 0.8t.
6. the construction method of terrace bed course underlying base layer soil stabilization as claimed in claim 1, it is characterized in that, described step 2 is also included on described bed course unit and offers detect aperture.
7. the construction method of terrace bed course underlying base layer soil stabilization as claimed in claim 1, it is characterized in that, described slurries comprise cement and water, and the water/binder ratio of described slurries is 0.55 ~ 0.60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100345.9A CN104652416A (en) | 2015-03-06 | 2015-03-06 | Construction method for strengthening base layer soil body under floor cushion layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100345.9A CN104652416A (en) | 2015-03-06 | 2015-03-06 | Construction method for strengthening base layer soil body under floor cushion layer |
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| Publication Number | Publication Date |
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| CN104652416A true CN104652416A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510100345.9A Pending CN104652416A (en) | 2015-03-06 | 2015-03-06 | Construction method for strengthening base layer soil body under floor cushion layer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735075A (en) * | 2016-02-02 | 2016-07-06 | 浙江大学 | Electroosmosis solidification processing method for temporary constructed roadbed at dredger fill field |
| CN107435346A (en) * | 2017-08-18 | 2017-12-05 | 北京恒祥宏业基础加固技术有限公司 | A kind of grouting and reinforcing method for correcting error suitable for high building structure |
| CN113944342A (en) * | 2021-10-20 | 2022-01-18 | 上海建工五建集团有限公司 | Leveling layer hollowing repairing method |
-
2015
- 2015-03-06 CN CN201510100345.9A patent/CN104652416A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735075A (en) * | 2016-02-02 | 2016-07-06 | 浙江大学 | Electroosmosis solidification processing method for temporary constructed roadbed at dredger fill field |
| CN105735075B (en) * | 2016-02-02 | 2017-11-17 | 浙江大学 | The temporary construction subgrade electric osmose solidification processing method of hydraulic reclamation soil site |
| CN107435346A (en) * | 2017-08-18 | 2017-12-05 | 北京恒祥宏业基础加固技术有限公司 | A kind of grouting and reinforcing method for correcting error suitable for high building structure |
| CN107435346B (en) * | 2017-08-18 | 2020-02-14 | 北京恒祥宏业基础加固技术有限公司 | Grouting reinforcement deviation rectifying method suitable for high-rise building structure |
| CN113944342A (en) * | 2021-10-20 | 2022-01-18 | 上海建工五建集团有限公司 | Leveling layer hollowing repairing method |
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Application publication date: 20150527 |