CN102359118B - Annular foundation of underground continuous wall and construction method thereof - Google Patents
Annular foundation of underground continuous wall and construction method thereof Download PDFInfo
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- CN102359118B CN102359118B CN2011102203030A CN201110220303A CN102359118B CN 102359118 B CN102359118 B CN 102359118B CN 2011102203030 A CN2011102203030 A CN 2011102203030A CN 201110220303 A CN201110220303 A CN 201110220303A CN 102359118 B CN102359118 B CN 102359118B
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Abstract
The invention relates to the field of building ground bases and foundations, and in particular discloses an annular foundation of an underground continuous wall and a construction method thereof. The annular foundation of the underground continuous wall comprises wall joints and at least three sections of walls, wherein the walls are connected end to end through the wall joints to form the annular foundation. Through the annular foundation of the underground continuous wall, the bottom foundation can form a whole to increase the stability, and annular piles of the underground continuous wall can exert the overall effect under the action of the upper dynamic load, so that the underground continuous wall has enough resistance; compared with a pile foundation, the annular foundation has the advantage of saving a certain amount of steel bars and concrete; the wall has high rigidity and good seepage control performance, and can be applied to multiple foundation conditions; and the method has the advantages of high work efficiency, short construction period, quality reliability and high economic benefit.
Description
Technical field
The present invention relates to building lot and basic field, particularly relate to a kind of annular foundation of underground continuous wall and construction method thereof.
Background technology
At present for the equipment of main equipment or dynamic load, as wind power generating set, frame, pylon fixing etc., the shortcoming such as the base form of employing exists cost high, and distortion is large, long in time limit.
China's wind energy is abundant; due to the generation of energy crisis and the use of advocating in recent years and the developing green energy; wind energy as a kind of cleaning, environmental protection and cheaply the energy become a kind of energy of advocating exploitation; wind-powered electricity generation is built industry and is also started development, and the construction of wind energy turbine set has more wide prospect.
Although the cost of blower foundation shared proportion in whole blower fan cost is very little, ground and basic safety decision-making the safety of whole pylon structure, aspect importance, with superstructure, at least are equal to.Because wind-powered electricity generation unit basis has the particularity of bearing 360 ° of direction reloadings and large eccentric pressuring, more general ground and basis, the wind-powered electricity generation unit requires higher to basic stability against overturning and stability against slope.
The form that traditional wind-powered electricity generation unit foundation main will adopt comprises spread footing and pile foundation.Spread footing is a kind of shallow foundation, is applicable to that embeded depth of foundation is less, the not high situation of bearing capacity of foundation soil.The construction of spread footing is too large to the concrete amount of expending, and needs to adopt larger foundation ' s bottom area, also needs in addition more reinforcing bar.Pile foundation is a kind of deep foundation, is applicable to when natural bearing capacity of foundation soil and distortion can not meet actual requirement, effect has the situations such as power machine basis that weaken its vibration effect than the high-rise structure of large horizontal force and moment of flexure and needs.The design of pile foundation is mainly for soft foundation, on soft foundation, spread footing can not meet the blower fan pylon structure to sedimentation, the requirement at inclination angle, therefore often adopt pile foundation, and the engineering quantity that pile foundation needs usually is large, the duration is long and very large to the raw-material amount of expending.
Summary of the invention
(1) technical problem that will solve
The problems such as the technical problem to be solved in the present invention is to provide a kind of annular foundation of underground continuous wall, to overcome existing basis, needs larger foundation ' s bottom area, expends concrete large, expends reinforcing bar more, and engineering quantity is large, long in time limit.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of annular foundation of underground continuous wall, comprising:
Body of wall joint and at least three sections bodies of wall, described body of wall joins end to end and forms ring-like basis by the body of wall joint.
Preferably, each section described wall connecting becomes regular polygon.
Preferably, described body of wall and described body of wall joint are all perpendicular to horizontal plane.
Preferably, the center line of described body of wall joint is positioned at the extended line intersection of two sections adjacent described bodies of wall.
Preferably, described body of wall and described body of wall joint are by reinforcing cage and concrete for making.
The present invention also provides the construction method on the ring-like basis of a kind of diaphragm wall, comprises step:
S1, along the longitudinal axis position excavation of diaphragm wall design, lead wall chase, and build steel concrete in leading wall chase and lead wall described;
S2, underground, dig out the groove identical with the degree of depth with body of wall design width, and clear groove;
S3, at each described groove place, place respectively reinforcing cage, between the end face of two adjacent described reinforcing cages, be provided with junction block;
S4, employing tremie method carry out concrete casting to described groove, and described concrete vibrating is closely knit;
S5, after described concrete is stable, extract described junction block, form circular hole in the body of wall end, by an end with projection, the reeded reinforcing cage of one end band is put into the groove at body of wall place, and described reinforcing cage projection embeds in described circular hole, then toward the interior concreting of described circular hole, repeat this step, each section wall connecting become to an integral body.
Preferably, the described wall bottom of leading is dropped on former soil layer, and the degree of depth is 1.2m～2.0m, and the described wall metope of leading is higher than construction plant 10cm～20cm.
Preferably, the just polygon row of the end to end formation of described each groove.
Preferably, described junction block is perpendicular to horizontal plane, more than the junction block lower end is placed to channel bottom and inserts soil layer 50cm.
(3) beneficial effect
Technique scheme has following beneficial effect: it is whole to increase its stability that a kind of annular foundation of underground continuous wall provided by the invention can make base foundation form, guarantee under the dynamic loading of top, the stake of diaphragm wall annular can be brought into play group effect, make it there is enough resistivities, with the conventional piles basis, compare and can save a certain amount of reinforcing bar and concrete.Wall stiffness of the present invention is large in addition, and barrier performance is good, and applicable to multiple foundation condition, and work efficiency is high, the duration is short, reliable in quality, economic benefit are high.
The accompanying drawing explanation
Fig. 1 is the top view of the annular foundation of underground continuous wall of the embodiment of the present invention;
Fig. 2 is the stereogram of the annular foundation of underground continuous wall of the embodiment of the present invention;
Fig. 3 is the flow chart of construction method of the annular foundation of underground continuous wall of the embodiment of the present invention.
Wherein, 1: body of wall; 2: the body of wall joint; 3: reinforcing cage; 4: concrete.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for the present invention is described, but are not used for limiting the scope of the invention.
As shown in Figure 1, the annular foundation of underground continuous wall of the embodiment of the present invention comprises: body of wall 1, body of wall joint 2, reinforcing cage 3 and concrete 4.
Underground continuous circular shape basis is comprised of at least three sections bodies of wall 1, body of wall 1 be shaped as cuboid, connect the end to end formation circulus of each body of wall 1 between each body of wall 1 by body of wall joint 2.The center line of body of wall joint 2 is positioned at the extended line intersection of two adjacent bodies of wall 1; Junction block is inserted between two sections bodies of wall 1, after extracting, can stays next circular hole on body of wall 1, just form body of wall joint 2 after joints cement in circular hole.Body of wall 1 is comprised of reinforcing cage 3 and concrete 4.
Annular foundation of underground continuous wall is comprised of body of wall 1 and body of wall joint 2 and forms an integral body, and such basis has better stability, can bear the huge load that top high-rise buildings structure transmits.Annular foundation of underground continuous wall forms with the soil around basis the confined pressure in the horizontal direction that integral body has effectively utilized surrounding soil, has increased basic stability simultaneously.
The embodiment of the present invention also provides a kind of construction method of annular foundation of underground continuous wall, and referring to Fig. 3, it comprises the following steps:
Step S1, the longitudinal axis position excavation designed along diaphragm wall are led wall chase and build steel concrete and lead wall in leading wall chase, lead the wall degree of depth generally at 1.2～2.0m, lead the wall metope higher than construction plant 10～20cm;
Step S2, use trench machine and and under the condition of mud off, dig out the groove identical with the degree of depth with body of wall design width underground, and clear groove, the just polygon row of the end to end formation of each groove;
Step S3, after each groove digs, a precast reinforced cage is placed respectively at each groove place, be provided with junction block between the end face of two adjacent reinforcing cages, junction block is vertically placed, keep plumbness, more than the lower end of junction block is placed to bottom land and continues insertion 50cm, the effect of junction block is that the side form of both sides is provided for body of wall when concreting, prevents the concrete effluent;
Step S4, employing tremie method carry out concrete casting to groove, and use concrete vibration bar that concrete vibrating is closely knit;
Step S5, under general condition concrete is carried out to maintenance, after concrete stable in properties, do not cave in after form removal, extract gradually junction block, each body of wall end forms circular hole, and wherein, the body of wall two ends that first paragraph is built are equipped with this type of circular hole.By a good end prepared in advance with projection, the reeded reinforcing cage of other end band is put into the groove at body of wall place, the projection of reinforcing cage is embedded in the circular hole of junction block formation, then at circular hole place concreting, this step is implemented in circulation, until each walling is connected into to an integral body, forms the underground circular wall.
As can be seen from the above embodiments, the embodiment of the present invention is whole to increase its stability by adopting annular foundation of underground continuous wall can make base foundation and foundation soil form, guarantee under the dynamic loading of top, annular foundation of underground continuous wall can be brought into play group effect, make it there is enough resistivities, with pile foundation, compare and can save a certain amount of reinforcing bar and concrete.Wall stiffness of the present invention is large in addition, and barrier performance is good, applicable to multiple foundation condition.Work efficiency is high, the duration is short, reliable in quality, economic benefit are high.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (1)
1. the construction method of annular foundation of underground continuous wall, is characterized in that, comprises step:
S1, along the longitudinal axis position excavation of diaphragm wall design, lead wall chase, and build steel concrete in leading wall chase and lead wall described;
S2, underground, dig out the groove identical with the degree of depth with body of wall design width, and clear groove;
S3, at each described groove place, place respectively reinforcing cage, between the end face of two adjacent described reinforcing cages, be provided with junction block; The lower end of junction block is placed to bottom land and continues and inserts;
S4, employing tremie method carry out concrete casting to described groove, and described concrete vibrating is closely knit;
S5, after described concrete is stable, extract described junction block, form circular hole in the body of wall end, by an end with projection, the reeded reinforcing cage of one end band is put into the groove at body of wall place, and described reinforcing cage projection embeds in described circular hole, then toward the interior concreting of described circular hole, repeat this step, each section wall connecting become to an integral body;
Wherein, the described wall bottom of leading is dropped on former soil layer, and the degree of depth is 1.2m～2.0m, and the described wall metope of leading is higher than construction plant 10cm～20cm; Described junction block is perpendicular to horizontal plane, more than the junction block lower end is placed to channel bottom and inserts soil layer 50cm.
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| CN2011102203030A CN102359118B (en) | 2011-08-02 | 2011-08-02 | Annular foundation of underground continuous wall and construction method thereof |
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| CN2011102203030A CN102359118B (en) | 2011-08-02 | 2011-08-02 | Annular foundation of underground continuous wall and construction method thereof |
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| CN102359118B true CN102359118B (en) | 2013-12-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103276752A (en) * | 2013-06-20 | 2013-09-04 | 江苏城市职业学院 | Construction method of underground continuous wall expansive concrete joint |
| CN103938649B (en) * | 2014-03-26 | 2016-06-29 | 中建四局第六建筑工程有限公司 | A kind of construction method on high-rise building cavity basis |
| CN112502184A (en) * | 2020-10-30 | 2021-03-16 | 广西玉柴机器股份有限公司 | Horizontal machining center foundation |
| CN113006113B (en) * | 2021-03-04 | 2022-05-06 | 浙江大学 | Composite anchorage foundation of enlarged-diameter steel pipe pile of underground diaphragm wall and construction method of composite anchorage foundation |
| CN114837210A (en) * | 2022-01-26 | 2022-08-02 | 华能清能通榆电力有限公司 | Fan foundation with honeycomb type underground continuous wall and construction method thereof |
| CN114809058A (en) * | 2022-06-15 | 2022-07-29 | 中建八局第二建设有限公司 | Equipment foundation of precision equipment and construction method |
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