CN105133619A - Construction method for deep foundation pit of elevator shaft - Google Patents
Construction method for deep foundation pit of elevator shaft Download PDFInfo
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- CN105133619A CN105133619A CN201510480069.3A CN201510480069A CN105133619A CN 105133619 A CN105133619 A CN 105133619A CN 201510480069 A CN201510480069 A CN 201510480069A CN 105133619 A CN105133619 A CN 105133619A
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Abstract
The invention provides a construction method for a deep foundation pit of an elevator shaft. The construction method comprises the following steps that construction of an auxiliary precipitation pit is firstly conducted; the depth of the auxiliary precipitation pit is 1-2 m larger than that of the deepest position of the deep foundation pit of the elevator shaft, and water drawing is conducted; then construction of the deep foundation pit of the elevator shaft is conducted, the deep foundation pit is made into a funnel-shaped water collection pit with the diameter of the bottom smaller than that of the top, and then water drawing is conducted; construction is conducted according to a drawing of the deep foundation pit of the elevator shaft, and water stop steel plates with the thickness of 3-5 mm are laid; construction is conducted on a waterproof layer of the surface of the elevator shaft; and finally concrete pouring is conducted. According to the construction method, construction is easy, the water level of a construction area of the elevator shaft can be lowered below the lowest point of the elevator shaft, it is guaranteed that no water is accumulated in the elevator shaft, then construction of the next procedure is conducted, and therefore water seepage risks are reduced, construction quality is improved, the construction period is shortened, and the aim of lowering cost is achieved.
Description
Technical field
The present invention relates to technical field of building construction, refer more particularly to a kind of elevator shaft construction method of deep foundation ditch.
Background technology
During the construction of building foundation, due to turning one's coat of underground water, often occur in elevator shaft that ponding is too much, cause elevator shaft cannot carry out the construction of concrete cushion and waterproof roll paving operation, therefore need to take measures, below the underground water ponding height reduction to construction height in foundation pit of elevator shaft.
On current building site, precipitation all uses foundation ditch well-points dewatering, and the method can control foundation ditch water level inside absolute altitude.But there is following defect in the method: elevator shaft elevation of bottom is all in foundation ditch bottom; along with increasing of floor; the elevator shaft degree of depth also increases relatively; therefore the phenomenon occurring that elevator shaft internal water accumulation too much cannot drain is easy to; therefore very large difficulty can be caused to cushion construction; if water is drained and construction cushion coat and waterproof roll by force, then there will be waterproof roll and gone out backplate surface by drum, and by phenomenon that fish tail and waterproof layer top is split.Therefore certain difficulty is caused to the construction of next procedure.
During elevator shaft when groundwater table is higher or collecting well are constructed, even if the continuous precipitation of conventional waterproof coiled material technique also cannot contain that soil diving collects and permeates around brick fetal membrane effectively, thus waterproof roll is caused to be destroyed; Model sheetinstallat often adopts the drum formwork hanging mould or bottom shutoff, thoroughly cannot solve deep-well template " floating " problem in casting process; Deep-well concreting cannot complete by primary concreting, easily forms the cold seam of construction, antiseep difficult treatment; In concreting process, ponding pump drainage is ineffective affects waterproof concrete Forming Quality.
Simultaneously, traditional construction of lift well technique is generally take below basement water level entire lowering to elevator shaft bottommost, carry out next step construction again, during civil engineering, the a large amount of ponding of base plate does not drain, emptying, and directly concrete is poured into water, cause around base plate and occur the common quality defects such as a lot of voids and pits.And whole Precipitation Process cycle length, inefficiency, duration and precipitation cost are higher, are difficult to satisfied on-the-spot fast pace, the strict demand of duration.
Therefore, need to invent a kind of novel elevator shaft construction method of deep foundation ditch, to reach good dewatering effect.
Summary of the invention
Technical problem to be solved by this invention is the deficiency for above-mentioned existence, there is provided a kind of construction simple, fast the water level in construction of lift well region can be down to below elevator shaft minimum point, guarantee in elevator shaft without ponding, then carry out the construction of next process again, thus reduce infiltration risk, improve workmanship, reduction of erection time, reach the object elevator shaft construction method of deep foundation ditch reduced costs.
The technical solution adopted for the present invention to solve the technical problems is:
Elevator shaft construction method of deep foundation ditch, is characterized in that, the method includes following steps:
First, before construction, elevator shaft deep foundation pit construction position marked and delimit boundary of works area, and reserves the space of 15-30 rice in boundary of works area both sides, carrying out the construction in auxiliary precipitation hole;
Auxiliary precipitation hole is a pair same specification and the vertical dell of the degree of depth, is symmetricly set on both sides, elevator shaft deep foundation pit construction position, and distance elevator shaft deep foundation ditch is all greater than 5m, and dark 1-2m is also wanted in the depth ratio elevator shaft deep foundation ditch bosom in auxiliary precipitation hole; Auxiliary precipitation hole is in work progress, and the water in hole constantly extracted out by employing water pump, auxiliary precipitation is cheated and the groundwater table in the same area residing for elevator shaft deep foundation ditch, drops to lower than elevator shaft deep foundation ditch bosom height;
Then carry out the construction of elevator shaft deep foundation ditch, first elevator shaft bottom is dug downwards, make base diameter little, the funnelform sump that top diameter is large; Built-in metal pipe in sump, metal tube is directly communicated with water pump, draws water;
After drawing water, construct according to elevator shaft deep foundation ditch drawing, sump is excavated into deep foundation ditch shape, then at construction of lift well seam place, lay the steel plate for sealing water that 3-5mm is thick;
Then elevator shaft surface waterproofing layer is constructed, add two-layer waterproofing course, and slow swollen type water expandable waterstop is set at basement bottom board and elevator shaft sidewall concrete wall place;
Finally carry out concreting, complete the construction of elevator shaft deep foundation ditch.
In such scheme, be equipped with suction water pipe in described auxiliary precipitation hole, and backfill has stone to be fixed by suction water pipe, the height of backfill stone is not higher than the innermost height of elevator shaft deep foundation ditch.
In such scheme, described sump draws water and adopts self prime pump to carry out drawing water operation, is extracted out by the ponding in sump, and pressurizes to the remaining underground water in the auxiliary precipitation hole of both sides while drawing water, and prevents setting of ground.
In such scheme, after completing elevator shaft deep foundation pit construction, construct to bottom foundation ditch, backfill element soil; The plain soil of backfill makes plain concrete and strengthens bed course; Strengthen bed course being arranged bottom waterproof roll layer at plain concrete; Bottom waterproof roll layer makes pea gravel concreten topping.
In such scheme, after completing elevator shaft deep foundation pit construction, make sidewall plain concrete fetal membrane; Ram in the outer layering of plain concrete fetal membrane and fill out backfill element soil; Plain concrete fetal membrane inwall arranges sidewall waterproof roll layer; Inside sidewall waterproof roll layer, build protection brick wall by laying bricks or stones, described protection tile is embedded with sealing up screw within the walls, and the space that protection brick wall and pea gravel concreten topping surround is the well that catchments.
In such scheme, the diameter of the particle of described backfill stone is: 20mm ~ 40mm.
Principle of the present invention is: before deep foundation pit construction, carry out the construction of assisting precipitation to cheat in both sides in advance, and extract auxiliary precipitation mine water, auxiliary precipitation is cheated and the groundwater table in the same area residing for elevator shaft deep foundation ditch, drops to lower than elevator shaft deep foundation ditch bosom height; Then construction by stages is carried out to deep foundation ditch, first stage is pumping phase, and second stage is the waterproof construction stage, because the water level of underground water in one's respective area has dropped to below the bosom of deep foundation ditch, therefore, in work progress, can not seep water the quality problems such as voids and pits occurs.
Beneficial effect of the present invention is:
Utilize this method, fast the water level in construction of lift well region can be down to below elevator shaft minimum point, guarantee in elevator shaft without ponding, then carry out the construction of next process again, and add one waterproofing course, avoid the common quality defect such as honeycomb, pitted skin, between basement bottom board and elevator shaft sidewall concrete wall, add slow swollen type water expandable waterstop, thus reduce infiltration risk.
Thus reach improve workmanship, reduction of erection time, reach the object reduced costs.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of the embodiment of the present invention;
In figure: 1 elevator shaft deep foundation ditch, 2 auxiliary precipitation holes, 3 steel plate for sealing water, 4 waterproofing courses.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further illustrated:
Elevator shaft construction method of deep foundation ditch as shown in Figure 1, the method includes following steps:
First before construction, to elevator shaft deep foundation ditch 1 construction location, place marks and delimit boundary of works area, and reserves the space of 15-30 rice in boundary of works area both sides, carries out the construction in auxiliary precipitation hole 2;
Auxiliary precipitation hole 2 is a pair same specification and the vertical dell of the degree of depth, is symmetricly set on both sides, elevator shaft deep foundation ditch 1 construction location place, and distance elevator shaft deep foundation ditch 1 is all greater than 5m, and dark 1-2m is also wanted in depth ratio elevator shaft deep foundation ditch 1 bosom in auxiliary precipitation hole 2; Auxiliary precipitation hole 2 is in work progress, and the water in hole constantly extracted out by employing water pump, makes auxiliary precipitation hole 2 and the groundwater table in the same area residing for elevator shaft deep foundation ditch 1, drops to lower than elevator shaft deep foundation ditch 1 bosom height;
Then carry out the construction of elevator shaft deep foundation ditch 1, first elevator shaft bottom is dug downwards, make base diameter little, the funnelform sump that top diameter is large; Built-in metal pipe in sump, metal tube is directly communicated with water pump, draws water.
After drawing water, construct according to elevator shaft deep foundation ditch 1 drawing, sump is excavated into deep foundation ditch shape, then at construction of lift well seam place, lay the steel plate for sealing water 3 that 3-5mm is thick.
Then elevator shaft surface waterproofing layer 4 is constructed, add two-layer waterproofing course, and slow swollen type water expandable waterstop is set at basement bottom board and elevator shaft sidewall concrete wall place.
Finally carry out concreting, complete the construction of elevator shaft deep foundation ditch.
In the present embodiment, be equipped with suction water pipe in described auxiliary precipitation hole 2, and backfill has stone to be fixed by suction water pipe, the diameter of the particle of backfill stone is: 20mm, and the height of backfill stone is not higher than the innermost height of elevator shaft deep foundation ditch.
In the present embodiment, described sump draws water and adopts self prime pump to carry out drawing water operation, is extracted out by the ponding in sump, and pressurizes to the remaining underground water in the auxiliary precipitation hole of both sides while drawing water, and prevents setting of ground.
In the present embodiment, after completing elevator shaft deep foundation ditch 1 construction, construct to bottom foundation ditch, backfill element soil; The plain soil of backfill makes plain concrete and strengthens bed course; Strengthen bed course being arranged bottom waterproof roll layer at plain concrete; Bottom waterproof roll layer makes pea gravel concreten topping;
In the present embodiment, after completing elevator shaft deep foundation pit construction, make sidewall plain concrete fetal membrane; Ram in the outer layering of plain concrete fetal membrane and fill out backfill element soil; Plain concrete fetal membrane inwall arranges sidewall waterproof roll layer; Inside sidewall waterproof roll layer, build protection brick wall by laying bricks or stones, described protection tile is embedded with sealing up screw within the walls, and the space that protection brick wall and pea gravel concreten topping surround is the well that catchments.
More than illustrate and be only Application Example of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalence change that the present patent application the scope of the claims is done, still belong to protection scope of the present invention.
Claims (6)
1. elevator shaft construction method of deep foundation ditch, is characterized in that, the method includes following steps:
First, before construction, elevator shaft deep foundation pit construction position marked and delimit boundary of works area, and reserves the space of 15-30 rice in boundary of works area both sides, carrying out the construction in auxiliary precipitation hole;
Auxiliary precipitation hole is a pair same specification and the vertical dell of the degree of depth, is symmetricly set on both sides, elevator shaft deep foundation pit construction position, and distance elevator shaft deep foundation ditch is all greater than 5m, and dark 1-2m is also wanted in the depth ratio elevator shaft deep foundation ditch bosom in auxiliary precipitation hole; Auxiliary precipitation hole is in work progress, and the water in hole constantly extracted out by employing water pump, auxiliary precipitation is cheated and the groundwater table in the same area residing for elevator shaft deep foundation ditch, drops to lower than elevator shaft deep foundation ditch bosom height;
Then carry out the construction of elevator shaft deep foundation ditch, first elevator shaft bottom is dug downwards, make base diameter little, the funnelform sump that top diameter is large; Built-in metal pipe in sump, metal tube is directly communicated with water pump, draws water;
After drawing water, construct according to elevator shaft deep foundation ditch drawing, sump is excavated into deep foundation ditch shape, then at construction of lift well seam place, lay the steel plate for sealing water that 3-5mm is thick;
Then elevator shaft surface waterproofing layer is constructed, add two-layer waterproofing course, and slow swollen type water expandable waterstop is set at basement bottom board and elevator shaft sidewall concrete wall place;
Finally carry out concreting, complete the construction of elevator shaft deep foundation ditch.
2. elevator shaft construction method of deep foundation ditch as claimed in claim 1, is characterized in that, be equipped with suction water pipe in described auxiliary precipitation hole, and backfill has stone to be fixed by suction water pipe, the height of backfill stone is not higher than the innermost height of elevator shaft deep foundation ditch.
3. elevator shaft construction method of deep foundation ditch as claimed in claim 1, it is characterized in that, described sump draws water and adopts self prime pump to carry out drawing water operation, ponding in sump is extracted out, and while drawing water, the remaining underground water in the auxiliary precipitation hole of both sides is pressurizeed, prevent setting of ground.
4. elevator shaft construction method of deep foundation ditch as claimed in claim 1, is characterized in that, after completing elevator shaft deep foundation pit construction, construct to bottom foundation ditch, backfill element soil; The plain soil of backfill makes plain concrete and strengthens bed course; Strengthen bed course being arranged bottom waterproof roll layer at plain concrete; Bottom waterproof roll layer makes pea gravel concreten topping.
5. elevator shaft construction method of deep foundation ditch as claimed in claim 1, is characterized in that, after completing elevator shaft deep foundation pit construction, makes sidewall plain concrete fetal membrane; Ram in the outer layering of plain concrete fetal membrane and fill out backfill element soil; Plain concrete fetal membrane inwall arranges sidewall waterproof roll layer; Inside sidewall waterproof roll layer, build protection brick wall by laying bricks or stones, described protection tile is embedded with sealing up screw within the walls, and the space that protection brick wall and pea gravel concreten topping surround is the well that catchments.
6. elevator shaft construction method of deep foundation ditch as claimed in claim 1, it is characterized in that, the diameter of the particle of described backfill stone is: 20mm ~ 40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510480069.3A CN105133619B (en) | 2015-08-07 | 2015-08-07 | Elevator construction method of deep foundation ditch |
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| CN201510480069.3A CN105133619B (en) | 2015-08-07 | 2015-08-07 | Elevator construction method of deep foundation ditch |
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| CN105133619A true CN105133619A (en) | 2015-12-09 |
| CN105133619B CN105133619B (en) | 2017-07-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106284365A (en) * | 2016-07-23 | 2017-01-04 | 杭州千城建筑设计有限公司 | A kind of WATER-WASHING METHOD of building foundation pit excavation |
| CN107152031A (en) * | 2017-06-24 | 2017-09-12 | 中铁十局集团第二工程有限公司 | It is a kind of to cheat elevator drainage arrangement without pair |
| CN108952082A (en) * | 2018-08-03 | 2018-12-07 | 徽都建设有限公司 | A kind of high rise elevator well construction method |
| CN111173038A (en) * | 2020-01-10 | 2020-05-19 | 北京泰德市政工程有限公司 | Construction process of vertical shaft |
| CN114809010A (en) * | 2022-05-06 | 2022-07-29 | 山西三建集团有限公司 | Construction method of elevator shaft and sump foundation retaining wall in easily-collapsed soil |
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| JPH06117130A (en) * | 1992-10-06 | 1994-04-26 | Hitachi Zosen Corp | Underground multi-story parking space and constructing method thereof |
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| CN102888847A (en) * | 2012-10-19 | 2013-01-23 | 中国二十二冶集团有限公司 | Construction method free from lowering water level for local deep foundation pit of elevator shaft |
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| JPH06117130A (en) * | 1992-10-06 | 1994-04-26 | Hitachi Zosen Corp | Underground multi-story parking space and constructing method thereof |
| CN201883450U (en) * | 2010-11-25 | 2011-06-29 | 中国京冶工程技术有限公司 | Coastal deep-foundation anti-seepage waterproof basement structure |
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| CN102888847A (en) * | 2012-10-19 | 2013-01-23 | 中国二十二冶集团有限公司 | Construction method free from lowering water level for local deep foundation pit of elevator shaft |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106284365A (en) * | 2016-07-23 | 2017-01-04 | 杭州千城建筑设计有限公司 | A kind of WATER-WASHING METHOD of building foundation pit excavation |
| CN107152031A (en) * | 2017-06-24 | 2017-09-12 | 中铁十局集团第二工程有限公司 | It is a kind of to cheat elevator drainage arrangement without pair |
| CN108952082A (en) * | 2018-08-03 | 2018-12-07 | 徽都建设有限公司 | A kind of high rise elevator well construction method |
| CN111173038A (en) * | 2020-01-10 | 2020-05-19 | 北京泰德市政工程有限公司 | Construction process of vertical shaft |
| CN114809010A (en) * | 2022-05-06 | 2022-07-29 | 山西三建集团有限公司 | Construction method of elevator shaft and sump foundation retaining wall in easily-collapsed soil |
| CN114809010B (en) * | 2022-05-06 | 2023-08-18 | 山西三建集团有限公司 | Construction method of elevator shaft and pit foundation retaining wall in easy-collapse soil |
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| CN105133619B (en) | 2017-07-21 |
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