CN203498819U - Expansive soil foundation construction - Google Patents
Expansive soil foundation construction Download PDFInfo
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- CN203498819U CN203498819U CN201320516539.3U CN201320516539U CN203498819U CN 203498819 U CN203498819 U CN 203498819U CN 201320516539 U CN201320516539 U CN 201320516539U CN 203498819 U CN203498819 U CN 203498819U
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- adobe sleeping
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Abstract
The embodiment of the utility model provides an expansive soil foundation construction to solve the problems of high construction cost and long construction period in the current expansive soil foundation construction. The expansive soil foundation construction comprises a foundation pit and a soil pit, wherein the foundation pit is used for fixing a building foundation and comprises an external foundation pit part positioned out of a building and an internal foundation pit part positioned in the building; the soil pit is used for fixing a geomembrane and comprises a top soil pit part positioned on the top of the external foundation pit part and an external soil pit part positioned out of the external foundation pit part; the geomembrane covers the bottom of the top soil pit part; geomembranes cover the side surface, adjacent to the external foundation pit part, of the external soil pit part and the bottom of the external soil pit part; a water discharging pipe is fixed to the bottom of the external soil pit part. By the expansive soil foundation construction of the embodiment of the utility model, the cost of earthwork can be reduced, the construction period can be shortened, the expansive soil foundation construction is easier to realize and control, and the potential harm risk of the building caused by the expansive soil foundation is avoided.
Description
Technical field
The utility model embodiment relates to expansive soil foundation technical field, particularly relates to a kind of expansive soil foundation structure.
Background technology
The mineralogical composition of expansive soil is mainly montmorillonite, is a kind of highly plastic clay, and general bearing capacity is higher, has the characteristics such as imbibition, dehydration contraction and repeated expansion and shrinkage distortion, the decay of immersion bearing capacity, desiccation crack growth, and character is extremely unstable.Expansive soil foundation often makes building produce the swell-shrinking deformation of inhomogeneous vertical or level, cause displacement, cracking, inclination even to destroy, and often occur in groups, especially serious with low layer one-storey house, harmfulness is very large, FRACTURE CHARACTERISTICS has horizontal fracture under exterior wall vertical fracture, oblique crack, end and windowsill, inside and outside gable symmetry or asymmetric herringbone crack etc.; There is longitudinally rectangular and latticed crack in terrace.Generally after building completion, in some months to five year, occurring, is a kind of disease ground to building.
While running into expansive soil foundation, can change expansive soil foundation structure, conventional processing method can comprise following two kinds:
(1) soil replacement method
The method of soil removal and replacement is to process the most common also effectively method of expansive soil, is illustrated in figure 1 the comparison diagram that expansive soil foundation structure before soil removal and replacement and the expansive soil foundation after soil removal and replacement are constructed.What in the expansive soil foundation structure before soil removal and replacement, fill is expansive soil, first excavates the expansive soil 101 in expansive soil foundation; Then in expansive soil foundation, change and fill out unexpansive natively 201, form the expansive soil foundation structure after soil removal and replacement.
But, the Tu Yuan of unexpansive soil in item area several kilometers even ten numbers be all difficult to find in kilometer range, the long-distance transportation that exchange is banketed causes construction costs too high, and has the unfavorable factors such as earthwork construction is long in time limit.
(2) compound foundation method
Compound foundation method is the construction method that the treating method of the compound foundation piles such as employing CFG, broken stone pile and lime pile is carried out part displacement.As shown in Figures 2 and 3, be respectively by plan view and the sectional drawing of the compound foundation pile of the improved expansive soil foundation structure of compound foundation method.In Fig. 2, each circle represents a compound foundation pile.In Fig. 3, at the top of compound foundation pile, be graded sand and stone mattress layer 301, compound foundation pile 302 passes expansive soil foundation atmospheric effect sharply degree of depth absolute altitude line (being arranged in the horizontal dotted line of top in Fig. 3) and expansive soil and base line of demarcation, unexpansive soil (Fig. 3 is positioned at the horizontal dotted line of below).
Although little to the demand of unexpansive displacement backfill amount like this, but, this kind of method needs special construction equipment and professional construction troop, and need to carry out specially quality control on construction and the testing of composite foundation, the defect such as have that construction costs is high, long construction period, sport technique segment are many.
In a word, although above-mentioned two kinds of methods are changed current expansive soil foundation structure, still all there is the shortcomings such as construction costs is high, long construction period in the expansive soil foundation structure after change.
Utility model content
The utility model embodiment technical problem to be solved is to provide a kind of expansive soil foundation structure, and to solve, current expansive soil foundation structure construction costs is high, the problem of long construction period.
In order to address the above problem, the utility model discloses a kind of expansive soil foundation structure, it is characterized in that, comprising:
For the foundation ditch on fixed building basis, described foundation ditch comprises the outside foundation ditch part that is positioned at building outside and the inside foundation ditch part that is positioned at interior of building; And,
Be used for the fixedly heatable adobe sleeping platform of geomembrane, described heatable adobe sleeping platform comprises the top heatable adobe sleeping platform part that is positioned at described outside foundation ditch part top and the outside heatable adobe sleeping platform part that is positioned at described outside foundation ditch portion of external;
Bottom in described top heatable adobe sleeping platform part is coated with geomembrane;
Side and described outside heatable adobe sleeping platform bottom partly adjacent with described outside foundation ditch part in described outside heatable adobe sleeping platform part are all coated with geomembrane;
Bottom in described outside heatable adobe sleeping platform part is fixed with gutter.
Alternatively, in the bottom of described outside heatable adobe sleeping platform part, be fixed with one or more gutters,
When being fixed with a gutter, described gutter is fixed on the centre of described outside heatable adobe sleeping platform part bottom;
When being fixed with a plurality of gutter, described a plurality of gutters are equally spaced arranged in the bottom of described outside heatable adobe sleeping platform part.
Alternatively, the bottom of described outside heatable adobe sleeping platform part is positioned at expansive soil foundation atmospheric effect sharply below degree of depth absolute altitude line, and the bottom of described outside heatable adobe sleeping platform part and described expansive soil foundation the atmospheric effect sharply distance between degree of depth absolute altitude line are more than or equal to 1000 millimeters.
Alternatively, the degree of depth of described top heatable adobe sleeping platform part is more than or equal to 500 millimeters.
Alternatively, the bottom of described foundation ditch is positioned at expansive soil foundation atmospheric effect sharply below degree of depth absolute altitude line, and the bottom of described foundation ditch and described expansive soil foundation the atmospheric effect sharply distance between degree of depth absolute altitude line are more than or equal to 500 millimeters.
Alternatively, described gutter is the double-wall corrugated gutter that partly oozes of rigid polyvinyl chloride.
Alternatively, described foundation ditch adopts graded sand and stone backfill.
Compared with prior art, the utility model embodiment comprises following advantage:
The utility model provides a kind of expansive soil foundation structure, and this expansive soil foundation structure comprises: for the foundation ditch on fixed building basis, described foundation ditch comprises the outside foundation ditch part that is positioned at building outside and the inside foundation ditch part that is positioned at interior of building; And for the fixing heatable adobe sleeping platform of geomembrane, described heatable adobe sleeping platform comprises the top heatable adobe sleeping platform part that is positioned at described outside foundation ditch part top and the outside heatable adobe sleeping platform part that is positioned at described outside foundation ditch portion of external; Bottom in described top heatable adobe sleeping platform part is coated with geomembrane; Side and described outside heatable adobe sleeping platform bottom partly adjacent with described outside foundation ditch part in described outside heatable adobe sleeping platform part are all coated with geomembrane; Bottom in described outside heatable adobe sleeping platform part is fixed with gutter.
The utility model utilizes geomembrane to cover the outside of expansive soil foundation on the one hand, thereby can completely cut off liquid phase and gas-phase condensation water in atmosphere, avoids it to enter in expansive soil foundation; By gutter, can and drain the liquid phase water water conservancy diversion in the soil beyond the expansive soil foundation of building below on the other hand.Thereby the expansive soil foundation structure by the utility model embodiment can reduce ground works cost, shortens construction period, more easily realize and control, and then evade expansive soil foundation to the potential harm risk of building.
Accompanying drawing explanation
Fig. 1 is the comparison diagram that in prior art, the expansive soil foundation after the expansive soil foundation before soil removal and replacement structure and soil removal and replacement is constructed;
Fig. 2 is the plan view that passes through the compound foundation pile of the improved expansive soil foundation structure of compound foundation method in prior art;
Fig. 3 is the sectional drawing that passes through the compound foundation pile of the improved expansive soil foundation structure of compound foundation method in prior art;
Fig. 4 is the schematic diagram of building described in the utility model and expansive soil foundation structure;
Fig. 5 is the schematic diagram of a kind of concrete expansive soil foundation structure described in the utility model.
The specific embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Because the character of expansive soil is extremely unstable, so expansive soil foundation often makes building produce the swell-shrinking deformation of inhomogeneous vertical or level, causes displacement, cracking, inclination even to destroy, and to building, is a kind of disease ground.
Therefore, adopt at present method cloth cover the problems referred to above that expansive soil foundation is transformed.For example, can adopt soil replacement method or compound foundation method to change expansive soil foundation structure.But still all there is the shortcomings such as construction costs is high, long construction period in the expansive soil foundation structure after said method change.
For the problems referred to above, the utility model proposes a kind of expansive soil foundation structure, this expansive soil foundation is configured in when avoiding above-mentioned expansive soil foundation to damage building, can also reduce construction costs, shorten construction period.
With reference to Fig. 4, show the schematic diagram of building described in the utility model and expansive soil foundation structure.As can be seen from Figure 4, in the body of wall bottom of building 1, be all provided with expansive soil foundation structure 2 described in the utility model, for the concrete structure of described expansive soil foundation structure 2, will in conjunction with Fig. 5, describe in detail below.
It should be noted that, Fig. 4 is sectional drawing, and in actual applications, the surrounding in building bottom is provided with described expansive soil foundation structure, utilizes described expansive soil foundation structure that described building is surrounded.
Below, introduce in detail the expansive soil foundation structure described in the utility model embodiment.
As shown in Figure 5, be the schematic diagram of a kind of concrete expansive soil foundation structure described in the utility model embodiment, described expansive soil foundation structure can comprise: foundation ditch 21, heatable adobe sleeping platform 22, geomembrane 23 and gutter 24.
In the utility model embodiment, described foundation ditch 21 is for fixed building basis (the rectangle object at the bottom of Fig. 5 foundation ditch 21 mid portion is building foundation).According to the position relationship of foundation ditch and building, described foundation ditch 21 can be divided into two parts, described foundation ditch 21 can comprise the outside foundation ditch part 211 that is positioned at building outside and the inside foundation ditch part 212 that is positioned at interior of building.
For described foundation ditch 21, can adopt graded sand and stone backfill, graded sand and stone refers to the mixed material that is used for doing basis or other purposes after the granularity (granular size) of sand or stone is mixed according to a certain percentage, adopts graded sand and stone backfill can make building foundation fixing more firm.Certainly, can also adopt other material to carry out backfill to described foundation ditch, such as cohesive soil, dirt etc., the utility model embodiment is not limited this.
Described heatable adobe sleeping platform 22 is for fixing geomembrane 23, in the utility model embodiment, is for the fixing heatable adobe sleeping platform of geomembrane 23 excavations, by after described heatable adobe sleeping platform backfill, described geomembrane can be fixed.According to the position relationship of heatable adobe sleeping platform and foundation ditch, described heatable adobe sleeping platform 22 can be divided into two parts, described heatable adobe sleeping platform 22 can comprise the top heatable adobe sleeping platform part 221 that is positioned at described outside foundation ditch part 211 tops and the outside heatable adobe sleeping platform part 222 that is positioned at described outside foundation ditch part 211 outsides.
For described heatable adobe sleeping platform 22, can adopt general earthen backfill, less demanding for soil nature.General soil (soil for stemming operation) can comprise: clay, silty clay, sand, silt, etc.Certainly, can also adopt other material to carry out backfill to described heatable adobe sleeping platform, the utility model embodiment is not limited this.
In the utility model embodiment, mainly in expansive soil foundation, to be provided with geomembrane and gutter, by geomembrane, can completely cut off gas phase and the liquid phase water in the atmosphere in atmosphere, thereby avoid water to enter expansive soil foundation, by gutter, the liquid phase water water conservancy diversion in the soil beyond the foundation soil of building below can be drained to the further impact of isolated liquid phase water on expansive soil foundation.
Described geomembrane is arranged in heatable adobe sleeping platform 22, concrete, in the bottom of described top heatable adobe sleeping platform part 221, is coated with geomembrane 23; In described outside heatable adobe sleeping platform part 222, the side adjacent with described outside foundation ditch part 211 and the bottom of described outside heatable adobe sleeping platform part 222 are all coated with geomembrane 23.After geomembrane is covered to above-mentioned part, described heatable adobe sleeping platform 22 is carried out to backfill, after backfill, described geomembrane can be fixed.
Geomembrane is to using plastic sheeting as antiseepage base material, and with the non-woven fabric compounded geotechnological impervious material forming, its barrier performance depends primarily on the barrier performance of plastic sheeting.Geomembrane is a kind of waterproof isolation-type material that high molecular polymer is base stock of take, and is mainly divided into: low density polyethylene (LDPE) (LDPE) geomembrane, high density polyethylene (HDPE) (HDPE) geomembrane and ethylene-vinyl acetate copolymer (EVA) geomembrane.In the utility model embodiment, can adopt above-mentioned any geomembrane, this is not limited.
Preferably, in the utility model embodiment, can also adopt composite geo-membrane, to improve the effect of geomembrane.Composite geo-membrane is the impermeable material being composited with geotextile and geomembrane, and it is mainly used in antiseepage, and composite geo-membrane is divided into cloth one film and two cloth one films, wide cut 4-6m, and weight is 200-1500g/m
2, the physical and mechanical property indexs such as tension, tear-proof, bursting are high, can meet the civil engineering needs such as water conservancy, municipal administration, building, traffic, subway, tunnel.Because it is selected in macromolecular material and production technology and has added aging-proof agent, therefore can use in conventional temperature environment.
Described gutter is also arranged in heatable adobe sleeping platform 22, concrete, in the bottom of described outside heatable adobe sleeping platform part 222, is fixed with gutter 24.In the utility model embodiment, in the bottom of described outside heatable adobe sleeping platform part, can be fixed with one or more gutters.When being fixed with a gutter, described gutter can be fixed on to the centre of described outside heatable adobe sleeping platform part bottom; When being fixed with a plurality of gutter, described a plurality of gutters equally spaced can be arranged in to the bottom of described outside heatable adobe sleeping platform part.Preferably, for cost-saving, a gutter can be only set, this gutter can reach the object of draining.
In the utility model embodiment, described gutter can be the double-wall corrugated gutter that partly oozes of rigid polyvinyl chloride (PVC-U), the double-wall corrugated gutter that partly oozes of PVC-U only allows water to pass through, sands etc. keep off outside oozing pipe, ooze pipe can will completely cut off liquid phase water water conservancy diversion in district's (being building below foundation soil) soil in addition draining, thereby avoid current to enter expansive soil foundation and it exerted an influence.
Certainly, can also adopt the gutter of other type, as long as can reach the object of partly oozing draining, for example, can adopt polyethylene (PE) double-wall corrugated pipe gutter, the utility model embodiment is not limited this.
Preferably, the degree of depth of the part of top heatable adobe sleeping platform described in the utility model embodiment is more than or equal to 500 millimeters.
In order to reduce the impact of atmosphere on expansive soil foundation, in the utility model embodiment, set geomembrane will pass sharply degree of depth absolute altitude line (in Fig. 5, foundation ditch 21 is through being sharply degree of depth absolute altitude line of described expansive soil foundation atmospheric effect with the horizontal dotted line of heatable adobe sleeping platform 22) of expansive soil foundation atmospheric effect, the described atmospheric effect sharply degree of depth refers to the significant especially degree of depth of atmospheric effect, at this, below degree of depth absolute altitude line, expansive soil is not subject to the impact of ambient atmosphere substantially.Therefore,, in the utility model embodiment, the bottom of described outside heatable adobe sleeping platform part is positioned at expansive soil foundation atmospheric effect sharply below degree of depth absolute altitude line.Preferably, can arrange the bottom of described outside heatable adobe sleeping platform part and described expansive soil foundation atmospheric effect sharply the distance between degree of depth absolute altitude line be more than or equal to 1000 millimeters.
And, in order to make building foundation more firm, reduce the impact of atmosphere on the foundation soil of building foundation below, embedded depth of foundation also will be set in the utility model embodiment and be greater than atmosphere and sharply affect the degree of depth, the bottom that described foundation ditch is set is positioned at expansive soil foundation atmospheric effect sharply below degree of depth absolute altitude line.Preferably, the bottom of described foundation ditch and described expansive soil foundation atmospheric effect sharply the distance between degree of depth absolute altitude line be more than or equal to 500 millimeters.
The utility model utilizes geomembrane to cover the outside of expansive soil foundation on the one hand, thereby can completely cut off liquid phase and gas-phase condensation water in atmosphere, avoids it to enter in expansive soil foundation; By gutter, can and drain the liquid phase water water conservancy diversion in the soil beyond the expansive soil foundation of building below on the other hand.It is little that thereby the expansive soil foundation described in the utility model embodiment is constructed required volume of earthwork, less demanding to construction equipment, compare soil removal and replacement method and compound foundation method processing expansive soil duration short, not high to the characteristic requirements in backfill source yet, specialty to constructor is less demanding, Construction Technology Control is easy, construction quality is easily guaranteed, thereby the topsoil backwater that foundation ditch is around occurred can also be drained the infringement of avoiding expansive soil foundation by water conservancy diversion, and then evades expansive soil foundation to the potential harm risk of building.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, commodity or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, commodity or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises described key element and also have other identical element.
Above to a kind of expansive soil foundation structure provided by the utility model, be described in detail, applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof; , for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model meanwhile.
Claims (7)
1. an expansive soil foundation structure, is characterized in that, comprising:
For the foundation ditch on fixed building basis, described foundation ditch comprises the outside foundation ditch part that is positioned at building outside and the inside foundation ditch part that is positioned at interior of building; And,
Be used for the fixedly heatable adobe sleeping platform of geomembrane, described heatable adobe sleeping platform comprises the top heatable adobe sleeping platform part that is positioned at described outside foundation ditch part top and the outside heatable adobe sleeping platform part that is positioned at described outside foundation ditch portion of external;
Bottom in described top heatable adobe sleeping platform part is coated with geomembrane;
Side and described outside heatable adobe sleeping platform bottom partly adjacent with described outside foundation ditch part in described outside heatable adobe sleeping platform part are all coated with geomembrane;
Bottom in described outside heatable adobe sleeping platform part is fixed with gutter.
2. expansive soil foundation structure according to claim 1, is characterized in that, in the bottom of described outside heatable adobe sleeping platform part, is fixed with one or more gutters,
When being fixed with a gutter, described gutter is fixed on the centre of described outside heatable adobe sleeping platform part bottom;
When being fixed with a plurality of gutter, described a plurality of gutters are equally spaced arranged in the bottom of described outside heatable adobe sleeping platform part.
3. expansive soil foundation according to claim 1 is constructed, it is characterized in that, the bottom of described outside heatable adobe sleeping platform part is positioned at expansive soil foundation atmospheric effect sharply below degree of depth absolute altitude line, and the bottom of described outside heatable adobe sleeping platform part and described expansive soil foundation the atmospheric effect sharply distance between degree of depth absolute altitude line are more than or equal to 1000 millimeters.
4. expansive soil foundation structure according to claim 1, is characterized in that, the degree of depth of described top heatable adobe sleeping platform part is more than or equal to 500 millimeters.
5. expansive soil foundation according to claim 1 is constructed, it is characterized in that, the bottom of described foundation ditch is positioned at expansive soil foundation atmospheric effect sharply below degree of depth absolute altitude line, and the bottom of described foundation ditch and described expansive soil foundation the atmospheric effect sharply distance between degree of depth absolute altitude line are more than or equal to 500 millimeters.
6. expansive soil foundation structure according to claim 1, is characterized in that, described gutter is the double-wall corrugated gutter that partly oozes of rigid polyvinyl chloride.
7. expansive soil foundation structure according to claim 1, is characterized in that, described foundation ditch adopts graded sand and stone backfill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320516539.3U CN203498819U (en) | 2013-08-22 | 2013-08-22 | Expansive soil foundation construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320516539.3U CN203498819U (en) | 2013-08-22 | 2013-08-22 | Expansive soil foundation construction |
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| CN203498819U true CN203498819U (en) | 2014-03-26 |
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| CN201320516539.3U Expired - Lifetime CN203498819U (en) | 2013-08-22 | 2013-08-22 | Expansive soil foundation construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487310A (en) * | 2018-03-15 | 2018-09-04 | 济南市市政工程设计研究院（集团）有限责任公司 | Reduce pipeline and construction technology is isolated with the geomembrane that building net level length requires |
| CN112663593A (en) * | 2020-12-17 | 2021-04-16 | 安徽建筑大学 | Expansive soil foundation drainage system |
-
2013
- 2013-08-22 CN CN201320516539.3U patent/CN203498819U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487310A (en) * | 2018-03-15 | 2018-09-04 | 济南市市政工程设计研究院（集团）有限责任公司 | Reduce pipeline and construction technology is isolated with the geomembrane that building net level length requires |
| CN112663593A (en) * | 2020-12-17 | 2021-04-16 | 安徽建筑大学 | Expansive soil foundation drainage system |
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