CN112411589A - Waterproof curtain suitable for adjacent protective building and construction method - Google Patents
Waterproof curtain suitable for adjacent protective building and construction method Download PDFInfo
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- CN112411589A CN112411589A CN202011264986.5A CN202011264986A CN112411589A CN 112411589 A CN112411589 A CN 112411589A CN 202011264986 A CN202011264986 A CN 202011264986A CN 112411589 A CN112411589 A CN 112411589A
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- mjs
- construction method
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- pile
- protective building
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
Abstract
The invention relates to a waterproof curtain suitable for an adjacent protective building and a construction method, belongs to the technical field of building construction, and is used for providing the waterproof curtain of the adjacent protective building, which has small influence on the surrounding environment. The waterproof curtain is sprayed into a semicircular waterproof structure by using MJS construction method piles. During construction, firstly, digging a groove; secondly, pre-forming holes, namely arranging the pre-forming holes along the axis of the foundation pit, wherein the hole pitch of the pre-forming holes is the same as the pile pitch of the MJS-method piles in the subsequent construction; thirdly, laying a sleeve in the preformed hole; fourthly, the MJS host is in place, and is installed and debugged; fifthly, trial spraying of piles in the MJS construction method; sixthly, putting down a drill rod of the MJS construction method pile; seventhly, forming a water stopping structure with a semicircular section by spraying slurry; eighthly, synchronously lifting the sleeve. This stagnant water curtain is close to protective building setting, but has the multi-angle construction, and is little to the surrounding environment influence, and it is big to effectively consolidate the degree of depth, and it is reliable to consolidate the effect, and it is changeable to consolidate body cross sectional shape, to advantages such as construction condition strong adaptability.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a waterproof curtain suitable for an adjacent protective building and a construction method.
Background
Under the environment that the surrounding construction conditions are complex, the situation that the foundation pit construction is close to a protective building is increasingly common nowadays, the using effect is guaranteed when the foundation pit enclosure and the waterproof curtain are constructed, meanwhile, the influence and the damage to the surrounding environment are avoided, and higher requirements are provided for the design and the construction of the waterproof curtain.
Therefore, there is a need for a waterproof curtain suitable for use in close proximity to a protective building to address the above problems.
Disclosure of Invention
The invention aims to provide a waterproof curtain suitable for an adjacent protective building and a construction method, which are used for constructing the waterproof curtain of the adjacent protective building. The method has the advantages of multi-angle construction, small influence on the surrounding environment, large effective reinforcement depth, reliable reinforcement effect, variable cross section shape of the reinforcement body, strong adaptability to construction conditions and the like.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a water stop curtain adapted for use in close proximity to a protective building, comprising the steps of:
step S1, digging a groove;
step S2, pre-forming holes are arranged along the axis of the foundation pit, and the hole pitch of the pre-forming holes is the same as the pile pitch of the MJS-method piles in the subsequent construction;
step S3, laying a sleeve in the preformed hole formed in the step S2;
step S4, positioning the MJS host, and installing and debugging;
step S5, performing pile trial spraying by using an MJS construction method;
step S6, putting down a drill rod of the MJS construction method pile;
step S7, forming a water stop structure with a semicircular section through guniting;
and step S8, synchronously pulling the sleeve.
Compared with the prior art, the invention has the beneficial technical effects that:
the waterproof curtain suitable for the adjacent protective buildings is a waterproof structure formed by jetting the MJS construction method piles into semicircles, the pile forming radius of the MJS construction method piles is 2400mm, the pile forming interval is 1700mm, the cement mixing amount is 40%, the reinforcing depth can be adjusted according to the depth of a foundation pit, and the maximum effective reinforcing depth can reach 62 m. The reinforcement structure is close to a protective building, and has the advantages of multi-angle construction, small influence on the surrounding environment, large effective reinforcement depth, reliable reinforcement effect, changeable section shape of a reinforcement body, strong adaptability to construction conditions and the like.
Furthermore, the MJS construction method is adopted for construction, the occupied space of equipment is small, the size of the equipment is 2.6 x 2.5 x 4.0m, and construction in a compact space is facilitated.
Furthermore, the semicircular pile forming section is formed by adopting the MJS construction method pile injection, one end can be enabled to be tightly attached to a protection building, and meanwhile, the influence of cement paste injection on the adjacent protection building foundation during the MJS construction method pile cement paste injection construction is avoided.
Furthermore, the pile forming radius of 2400mm, the pile forming interval of 1700mm and the cement mixing amount of 40 percent are adopted, so that the water stopping effect and the depth reliability under the medium-density cohesive soil are ensured.
Drawings
FIG. 1 is a cross-sectional view of a water stop curtain of the present invention suitable for use in close proximity to a protective building;
FIG. 2 is a plan view of a water stop curtain of the present invention suitable for use in close proximity to a protective building.
In the figure:
1-MJS construction method pile; 2-drilling a cast-in-place pile; 3-first-pass support; 4-second support; 5-high pressure jet grouting pile.
Detailed Description
The waterproof curtain suitable for the adjacent protective building and the construction method provided by the invention are further described in detail by combining the attached drawings and the specific embodiment. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
The MJS construction method pile is an omnibearing high-pressure injection method pile. Wherein, the folded plate, the common plate and the non-standard plate (the form is the same as the common plate) are connected by adopting a semicircular concave-convex groove. The MJS construction method pile 1 is arranged above the cast-in-situ bored pile 2, and the two piles are fixedly connected. Two supports are arranged above the cast-in-situ bored pile 2 and are respectively a first support 3 and a second support 4. The first support 3 is arranged at the top of the cast-in-situ bored pile 2. A high-pressure jet grouting pile 5 is arranged below the second support 4.
The waterproof curtain suitable for the immediate protective building and the construction method of the invention are described in detail below with reference to fig. 1 and 2.
Example one
As shown in fig. 1 and 2, a waterproof curtain adapted to be used in close proximity to a protective building,
the cross section of the construction is semicircular, an effective waterproof curtain can be formed in a small space, and meanwhile, the uplift and the subsidence of a foundation caused by jet grouting can be controlled by controlling the sludge discharge amount and the underground pressure, so that the influence of construction on adjacent buildings is effectively controlled.
In this embodiment, more preferably, the spraying angle can be controlled, the occupied space of the equipment is small, the spraying angle is controlled to be 180 °, the construction of the waterproof curtain in the limited space is ensured, the plane can be tightly attached to the adjacent protective building, the disturbance of the sprayed cement slurry on the foundation of the adjacent building is avoided, the pile-forming radius of the waterproof curtain is ensured to the maximum, and the waterproof effect of the waterproof curtain is ensured.
In this embodiment, more preferably, the pile-forming radius of the MJS construction method pile is 2400mm, the pile-forming interval is 1700mm, the cement content is 40%, under the working condition of vertical pile-forming, the standard effective diameter of 2400mm and the cement content of 40% ensure that the water stopping depth and the water stopping effect are reliable under the medium-density cohesive soil, and simultaneously, the pile-forming interval of 1700mm ensures the overlapping strength and the water stopping effect between two piles.
With continued reference to fig. 1 and 2, the present embodiment also provides a construction method of a waterproof curtain adapted to be closely adjacent to a protective building, the construction method including the steps of:
step S1, digging a groove;
step S2, pre-forming holes are arranged along the axis of the foundation pit, and the hole pitch of the pre-forming holes is the same as the pile pitch of the MJS-method piles in the subsequent construction;
step S3, laying a sleeve in the preformed hole formed in the step S2;
step S4, positioning the MJS host, and installing and debugging;
step S5, performing pile trial spraying by using an MJS construction method;
step S6, putting down a drill rod of the MJS construction method pile;
step S7, forming a water stop structure with a semicircular section through guniting;
and step S8, synchronously pulling the sleeve.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (7)
1. A method of constructing a waterproof curtain adapted for use adjacent a protective building, comprising the steps of:
step S1, digging a groove;
step S2, pre-forming holes are arranged along the axis of the foundation pit, and the hole pitch of the pre-forming holes is the same as the pile pitch of the MJS-method piles in the subsequent construction;
step S3, laying a sleeve in the preformed hole formed in the step S2;
step S4, positioning the MJS host, and installing and debugging;
step S5, performing pile trial spraying by using an MJS construction method;
step S6, putting down a drill rod of the MJS construction method pile;
step S7, forming a water stop structure with a semicircular section through guniting;
and step S8, synchronously pulling the sleeve.
2. The construction method as claimed in claim 1, wherein the MJS-method pile has a semicircular sectional shape.
3. The construction method according to claim 2, wherein the angle of the guniting in the step S7 is 180 °.
4. The waterproof curtain is suitable for being adjacent to a protective building and is characterized by comprising a waterproof structure which is formed by jetting piles in an MJS construction method and has a semicircular section, wherein the waterproof structure is arranged adjacent to a foundation pit of the protective building.
5. A waterproof curtain suitable for use immediately adjacent to a protective building according to claim 4, wherein the MJS-engineered piles have a radius of 2400mm and are spaced 1700mm apart.
6. The waterproof curtain suitable for use proximate a protective building of claim 4, wherein the MJS-engineered pile has a cement loading content of 40%.
7. A waterproof curtain adapted for use proximate a protective building according to claim 4, characterised in that the maximum depth of the waterproof structure is 62 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264986.5A CN112411589A (en) | 2020-11-13 | 2020-11-13 | Waterproof curtain suitable for adjacent protective building and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264986.5A CN112411589A (en) | 2020-11-13 | 2020-11-13 | Waterproof curtain suitable for adjacent protective building and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN112411589A true CN112411589A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011264986.5A Pending CN112411589A (en) | 2020-11-13 | 2020-11-13 | Waterproof curtain suitable for adjacent protective building and construction method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033160A (en) * | 2014-06-11 | 2014-09-10 | 同济大学 | Novel support method applicable to shallow-buried subsurface tunnel of soft soil stratum |
| CN209040135U (en) * | 2018-09-06 | 2019-06-28 | 中铁第一勘察设计院集团有限公司 | A kind of deep soft stratum combined type foundation pit Water outburst treatment construction |
| CN110080214A (en) * | 2019-05-13 | 2019-08-02 | 上海智平基础工程有限公司 | A kind of construction method of oblique high-pressure rotary jet grouting pile |
| CN110185035A (en) * | 2019-05-31 | 2019-08-30 | 武汉江钻恒立工程钻具股份有限公司 | A kind of pile making method of the MJS engineering method suitable for hardpan |
| CN110318401A (en) * | 2019-06-05 | 2019-10-11 | 中铁七局集团有限公司 | Suitable for the construction method to open cut area large size pipeline in-situ conservation and pattern foundation pit supporting structure |
| CN111593726A (en) * | 2020-05-19 | 2020-08-28 | 南京林业大学 | Joint reinforcement method for underground tunnel penetrating sensitive pipeline of water-rich stratum and butt joint of existing structure MJS + artificial freezing |
| AU2021106928A4 (en) * | 2020-11-25 | 2021-11-25 | China Railway No.8 Engineering Group Co., Ltd. | Construction method for excavation of deep pit with triaxial mixing pile waterstop curtains and rotary bored cast-in-place pile supports |
-
2020
- 2020-11-13 CN CN202011264986.5A patent/CN112411589A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033160A (en) * | 2014-06-11 | 2014-09-10 | 同济大学 | Novel support method applicable to shallow-buried subsurface tunnel of soft soil stratum |
| CN209040135U (en) * | 2018-09-06 | 2019-06-28 | 中铁第一勘察设计院集团有限公司 | A kind of deep soft stratum combined type foundation pit Water outburst treatment construction |
| CN110080214A (en) * | 2019-05-13 | 2019-08-02 | 上海智平基础工程有限公司 | A kind of construction method of oblique high-pressure rotary jet grouting pile |
| CN110185035A (en) * | 2019-05-31 | 2019-08-30 | 武汉江钻恒立工程钻具股份有限公司 | A kind of pile making method of the MJS engineering method suitable for hardpan |
| CN110318401A (en) * | 2019-06-05 | 2019-10-11 | 中铁七局集团有限公司 | Suitable for the construction method to open cut area large size pipeline in-situ conservation and pattern foundation pit supporting structure |
| CN111593726A (en) * | 2020-05-19 | 2020-08-28 | 南京林业大学 | Joint reinforcement method for underground tunnel penetrating sensitive pipeline of water-rich stratum and butt joint of existing structure MJS + artificial freezing |
| AU2021106928A4 (en) * | 2020-11-25 | 2021-11-25 | China Railway No.8 Engineering Group Co., Ltd. | Construction method for excavation of deep pit with triaxial mixing pile waterstop curtains and rotary bored cast-in-place pile supports |
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