阅读说明：本技术 一种管涵的变形控制结构及施工方法 (Deformation control structure of pipe culvert and construction method ) 是由 潘国华 樊金甲 宋叶青 刘明维 王亮 阿比尔的 孔增增 杨建峰 吴发友 周坤壹 于 2021-09-18 设计创作，主要内容包括：本发明涉及建筑工程技术领域,具体是一种管涵的变形控制结构及施工方法,包括管涵和支撑结构,管涵部分管节上部支撑有重力件,所述支撑结构包括支撑结构Ⅰ和支撑结构Ⅱ,其中所述支撑结构Ⅰ包括设置在管涵两侧的支撑部Ⅰ,支撑部Ⅰ异于固定管涵的一侧通过支撑地基Ⅰ支撑固定,通过支撑地基Ⅰ协助设置在管涵两侧的支撑部Ⅰ对管涵进行横向支撑,所述支撑结构Ⅱ包括支撑部Ⅱ以及支撑地基Ⅱ,其中通过所述支撑部Ⅱ对位于重力件底部的管涵管节处进行支撑,通过支撑地基Ⅱ对未作用在重力件底部的管节处进行支撑,避免了现有在软土地基中修筑管涵所在地基上部修筑引航路、路堤时,由于软土地基缺少足够的支撑,造成管涵发生开裂和沉降等等问题。(The invention relates to the technical field of building engineering, in particular to a deformation control structure of a pipe culvert and a construction method, the deformation control structure comprises the pipe culvert and a supporting structure, the upper part of a part of pipe joints of the pipe culvert is supported by a gravity piece, the supporting structure comprises a supporting structure I and a supporting structure II, wherein the supporting structure I comprises supporting parts I arranged on two sides of the pipe culvert, one side of each supporting part I, which is different from the fixed pipe culvert, is supported and fixed through a supporting foundation I, the supporting parts I arranged on two sides of the pipe culvert are assisted by the supporting foundation I to transversely support the pipe culvert, the supporting structure II comprises a supporting part II and a supporting foundation II, the pipe culvert pipe joints positioned at the bottom of the gravity piece are supported through the supporting part II, the pipe joints not acting on the bottom of the gravity piece are supported through the supporting foundation II, and the problem that the existing pipe culvert building guide way is built on the upper part of the foundation in a soft foundation is avoided, When the embankment is used, the problems of cracking, settlement and the like of the pipe culvert are caused due to the fact that the soft soil foundation lacks sufficient support.)

1. A deformation control structure of a pipe culvert comprises the pipe culvert and a supporting structure for supporting the pipe culvert, and is characterized in that the pipe culvert is provided with a plurality of supporting structures;

the pipe culvert is formed by connecting a plurality of pipe joints, and the upper parts of the pipe joints of the pipe culvert part are supported with gravity pieces;

the supporting structure comprises a supporting structure I and a supporting structure II, the pipe culvert is placed in a foundation pit supported by the supporting structure I, and the supporting structure II arranged at the bottom of the foundation pit is in contact with the bottom of the pipe culvert for supporting;

the supporting structure I comprises supporting parts I arranged on two sides of the pipe culvert, one side of each supporting part I, which is different from the side for fixing the pipe culvert, is supported and fixed through a supporting foundation I, and the supporting parts I arranged on the two sides of the pipe culvert are assisted by the supporting foundation I to transversely support the pipe culvert;

bearing structure II includes supporting part II and supports ground II, wherein passes through supporting part II supports the pipe culvert pipe coupling department that is located the gravity piece bottom, supports the pipe coupling department that does not act on the bottom of the gravity piece through supporting ground II.

2. The deformation control structure of a pipe culvert according to claim 1, wherein the gravity member comprises a retaining wall, the wall parts of the retaining wall acting on both sides of the pipe culvert are supported by a support foundation III, and the support foundation III comprises a hard soil layer III mixed by cement and soil.

3. The deformation control structure of the pipe culvert according to claim 1, wherein the supporting foundation I comprises a hard soil layer I, the supporting part I comprises a plurality of cast-in-place piles I, the pipe culvert is fixedly supported by the cast-in-place piles I arranged on two sides of the pipe culvert, and one side of the cast-in-place piles I, which is different from the side connected with the pipe culvert, is supported by the hard soil layer I;

and a plurality of cast-in-place piles I are supported by a plurality of auxiliary supporting pieces to control the transverse deformation of the cast-in-place piles.

4. The deformation control structure of a pipe culvert according to claim 1, wherein the secondary supporting members are detachably connected to the plurality of cast-in-place piles I on two sides through connecting seats, and comprise concrete supporting columns and metal supporting columns;

the concrete support columns are connected through crown beam supports arranged at the upper parts of the cast-in-place piles I;

the metal support column is connected with the support through surrounding purlins arranged on the column bodies of the filling piles I.

5. The deformation control structure of a pipe culvert according to claim 1, wherein a slope for preventing the soil wall from collapsing is arranged outside the foundation pit, the slope surface of the slope is fixed by a fixing structure, and the slope is provided with a plurality of drainage pipelines for draining water.

6. The deformation control structure of a pipe culvert according to claim 1, wherein a protective enclosure is arranged at the joint of the slope and the foundation pit, and sundries are prevented from sliding into the foundation pit when the foundation pit is excavated through the protective enclosure.

7. The deformation control structure of a pipe culvert according to claim 1, wherein the supporting foundation II comprises a hard soil layer II, and the joints of the pipe joints which are not positioned at the lower part of the retaining wall are supported by the hard soil layer II.

8. The deformation control structure of a pipe culvert according to claim 1, wherein the supporting parts II comprise a plurality of cast-in-place piles II, and the joints of the pipe joints at the lower part of the retaining wall are supported by the cast-in-place piles II.

9. The deformation control structure of a pipe culvert according to claim 1, wherein the bottom of the pipe culvert is fixedly connected with the support structure II through a support plate, the upper part of the pipe culvert is contacted with a backfill material through the support plate, and the backfill material comprises plain concrete.

10. A construction method of a deformation control structure of a pipe culvert is characterized in that;

after the foundation pit position is determined, a supporting foundation I is built on two sides of the foundation pit respectively, supporting parts are arranged on the two sides of the supporting foundation I towards the excavation side of the foundation pit, after the foundation pit is excavated to the design height of the pipe culvert, a supporting structure II is built on the bottom of the foundation pit, a supporting part II is built at the joint of the pipe culvert, which is located at the bottom of the gravity part, for supporting, and the pipe culvert pipe joint, which is not located at the bottom of the gravity part, is supported through the supporting foundation II.

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a deformation control structure of a pipe culvert and a construction method.

Background

The pipe culvert refers to a water pipe buried underground and can be used as a water channel below the ground elevation, the finished pipe joints of the engineering prefabricated reinforced concrete pipe are usually adopted, the end faces of the pipe joints are in the forms of circles, ellipses, oval shapes and the like, and the pipe culvert is formed by connecting a plurality of finished pipe joints, so that the pipe culvert is mainly supported in the joint position, and the deformation and cracking of the joint position of the pipe culvert are avoided.

When the construction of the pipe culvert is carried out in the water-rich soft soil area, because the underground water level in the area is high, the deformation is large, the soil body supporting capacity is weaker, the construction difficulty of the increased pipe culvert in the soft soil foundation, and when retaining walls such as a navigation channel and an embankment are constructed simultaneously on the upper part of the pipe culvert constructed in the soft soil foundation, the deformation of the soft soil foundation at the bottom needs to be further strictly controlled, so that the influence of the soft soil foundation on the pipe culvert is reduced.

When the existing method for building the guide way and the embankment on the upper part of the foundation where the pipe culvert is built in the soft soil foundation is adopted, the problem of large deformation of the soft soil foundation is caused because the soft soil foundation is lack of sufficient support, so that the stability of the pipe culvert is influenced, the problem of cracking, settlement and the like of the pipe culvert is caused, and the problems of pipe joint disjointing, water leakage and the like are caused in serious conditions.

Disclosure of Invention

The invention aims to provide a deformation control structure of a pipe culvert and a construction method, and aims to solve the problems that when a navigation path and an embankment are built on the upper part of a foundation where the pipe culvert is built in the existing soft soil foundation, the soft soil foundation is lack of sufficient support, so that the soft soil foundation is greatly deformed, the stability of the pipe culvert is influenced, the pipe culvert is cracked and settled, pipe joints are disconnected and water is leaked in serious cases, and the like.

In order to achieve the above object, the present invention provides a deformation control structure of a pipe culvert: including the pipe culvert and support the bearing structure of pipe culvert, the pipe culvert is formed through connecting a plurality of pipe joints, and the pipe culvert part pipe joint upper portion is supported there is the gravity piece, the gravity piece includes the barricade, bearing structure includes bearing structure I and bearing structure II, the pipe culvert is placed in the foundation ditch that I of bearing structure supported, supports the pipe culvert through I bearing structure and avoids its lateral deformation, supports through bearing structure II and the contact of pipe culvert bottom that sets up in the foundation ditch bottom, avoids the vertical direction of pipe culvert to warp.

As a further explanation of the inventive solution: the supporting structure I comprises supporting parts I arranged on two sides of the pipe culvert, the supporting parts I comprise a plurality of cast-in-place piles I, one sides of the cast-in-place piles I, different from the fixed pipe culvert, are supported and fixed through supporting foundations I, the supporting foundations I comprise hard soil layers I, and the pipe culvert is transversely supported through the cast-in-place piles I arranged on the two sides of the pipe culvert in a assisted mode;

bearing structure II includes supporting part II and supports ground II, it includes stereoplasm soil layer II to support the tube coupling seam of not being in the barricade lower part through stereoplasm soil layer II to support ground II, supporting part II includes a plurality of bored concrete pile II, supports the tube coupling seam of being in the barricade lower part through a plurality of bored concrete pile II.

As a still further explanation of the inventive solution: support is assisted through a plurality of vice support piece between a plurality of bored concrete pile I, the horizontal deformation of control supporting structure I, and vice support piece includes concrete support column and metal support column, and concrete support column and metal support column both ends are all connected the bored concrete pile I in both sides through the connecting seat dismantlement formula.

As a still further explanation of the inventive solution: the foundation ditch outside is equipped with the slope of putting that prevents the soil wall collapse, it is fixed through fixed knot structure to put sloping domatic, fixed knot constructs including concrete layer, and concrete layer pours on the soil body of putting the slope place, and concrete layer cuts into inside the soil body through domatic soil nail, assists the soil body of concrete layer fixed slope bottom of putting.

Meanwhile, the invention also provides a construction method of the deformation control structure of the pipe culvert, which comprises the following construction steps:

leveling a field embedded in the pipe culvert to a designed elevation according to the setting of a drawing;

digging slopes on two sides of the position of the foundation pit, fixing the surfaces of the slopes through concrete layers and slope soil nails, and assisting in protecting the enclosing wall by the slopes and the edge of the foundation pit;

after slope placement and construction are completed, excavating and spraying cement and soil bodies on two sides of a foundation pit through multi-shaft stirring piles to form a hard soil layer I, excavating pile holes at the positions, close to the foundation pit, of the hard soil layer through drilling equipment after the hard soil layer I is formed in a reaction mode, placing cast-in-place piles I in the pile holes, enabling a plurality of cast-in-place piles to abut against one another in sequence to form supporting parts I, mounting crown beams at the tops of the cast-in-place piles I, locating at the positions on two sides of a supporting structure I in the range of intersection points of a pipe culvert and a retaining wall, and constructing a hard soil layer III which supports the retaining wall and is not located on the upper part of the pipe culvert and is a wall body;

after the filling column I reaches the design strength, excavating a foundation pit on the inner side of the filling pile I, and connecting a concrete support column at the top of the filling pile I after excavating to the design elevation of the first support foundation pit;

sequentially excavating to a second supporting foundation pit and a third supporting foundation pit designed elevations, and connecting the second metal supporting column and the third metal supporting column through an enclosing purlin fixed on the cast-in-place pile I;

after the pipe culvert is excavated to the bottom elevation of the pipe culvert installed in the foundation pit, building a hard soil layer II and a cast-in-place pile II at the joint contact position of the pipe culvert laid at the bottom of the foundation pit, wherein a plurality of cast-in-place piles II are arranged at the bottom of the pipe culvert positioned at the lower part of the retaining wall for supporting according to the position of the retaining wall at the upper part of the pipe culvert, and hard soil layers II are arranged at the bottom of the pipe culvert not positioned at the lower part of the retaining wall for supporting;

after waiting that stereoplasm soil layer II and bored concrete pile II all reach design strength, lay the bottom suspension fagging in the foundation ditch bottom, lay the pipe culvert on the bottom suspension fagging, the backup pad is laid on pipe culvert upper portion, after the installation is accomplished to the pipe culvert, by supreme metal support column and the concrete support column of demolising down in proper order to backfill plain concrete, take plain concrete to design strength after, carry out the construction of barricade and build, the barricade is different in the side backfill that faces water to barricade design elevation, backfill the completion back, carry out the construction operation of the next pipe section of pipe culvert.

Drawings

Fig. 1 is a schematic view of a lateral support structure of a deformation control structure of a pipe culvert.

Fig. 2 is a schematic diagram of the placement position of a pipe culvert in a deformation control structure of the pipe culvert.

Fig. 3 is a top view of fig. 2.

Figure 4 is a schematic view of a vertical support structure of a deformation control structure of a pipe culvert.

Fig. 5 is a schematic cross-sectional view taken along line a-a in fig. 4.

Fig. 6 is a schematic diagram of the three-dimensional structure of fig. 4.

FIG. 7 is a schematic diagram of the positions of hanging points inside a pipe culvert.

In the figure: 1. a hard soil layer I; 2. filling a pile I; 21. a crown beam; 3. a concrete support column; 4. a metal support post; 41. enclosing purlins; 5. a pipe culvert; 51. a lower support plate; 52. an upper support plate; 53. a pipe joint seam I; 54. pipe joint seam II; 6. filling a pile II; 7. slope releasing; 71. slope soil nails; 72. a wall; 73. a drain pipe; 8. a hard soil layer II; 9. retaining walls; 10. a hard soil layer III; 11. and a concrete layer.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, fig. 2 and fig. 5, in the embodiment of the present invention, a deformation control structure of a pipe culvert: including pipe culvert 5 and support pipe culvert 5's bearing structure, pipe culvert 5 is formed through connecting a plurality of tube couplings, and 5 partial tube couplings upper portion of pipe culvert are supported there is the gravity piece, the gravity piece includes barricade 9, bearing structure includes bearing structure I and bearing structure II, pipe culvert 5 is placed in the foundation ditch that bearing structure I supported, supports pipe culvert 5 through bearing structure I and avoids its lateral deformation, supports through bearing structure II that sets up in the foundation ditch bottom and 5 bottom contacts of pipe culvert, avoids 5 vertical directions deformations of pipe culvert.

As shown in fig. 3, 5 and 6, in the embodiment of the present invention, the gravity member includes a retaining wall 9, wall portions of the retaining wall 9 acting on both sides of the pipe culvert are supported by a supporting foundation iii, the supporting foundation iii includes a hard soil layer iii 10, and in actual construction, the gravity member on the upper portion of the pipe culvert may also be an embankment or other fixed seats, etc.

As shown in fig. 2 to 4, in the embodiment of the present invention, the support structure i includes support portions i disposed at two sides of the pipe culvert 5, the support portions i include a plurality of cast-in-place piles i 2, one side of the cast-in-place piles i 2 different from the fixed pipe culvert 5 is supported and fixed by a support foundation i, the support foundation i includes a hard soil layer i 1, and the pipe culvert 5 is laterally supported by the cast-in-place piles i 2 disposed at two sides of the pipe culvert 5;

the supporting structure II comprises a supporting part II and a supporting foundation II, the supporting foundation II comprises a hard soil layer II 8, a pipe joint II 54 which is not positioned at the lower part of the retaining wall 9 is supported through the hard soil layer II 8, the supporting part II comprises a plurality of cast-in-place piles II 6, and a pipe joint I53 which is positioned at the lower part of the retaining wall 9 is supported through the plurality of cast-in-place piles II 6;

the invention relates to a filling pile I2 and a filling pile II 6, which are concrete filling piles made by mixing concrete and a reinforcement cage, wherein the filling piles are placed in pile holes dug by a drilling structure, filling piles with proper lengths and specifications are selected according to different positions of the filling piles, the filling piles at different positions are marked by using labels, the invention is convenient to understand the invention, meanwhile, a hard soil layer I1, a hard soil layer II 8 and a hard soil layer III 10 are respectively made by mixing cement and soil bodies with different specifications, the cement is driven by a multi-shaft stirring pile to be sprayed to the position of a supporting foundation, the cement and the soil bodies are driven by the multi-shaft stirring pile to be stirred until the cement and the soil bodies are hardened, the area of the hard soil layer is also displayed by using the label of the hard soil layer, the specification of the multi-shaft stirring pile is a double-row three-shaft stirring pile, in the actual design, the number of the shafts and the number of the mixing piles can be flexibly adjusted according to the actual excavation condition, and the method is not limited to the method for selecting the double-row three-shaft mixing piles.

As shown in fig. 1, in the embodiment of the invention, a plurality of cast-in-place piles i 2 are supported with assistance by a plurality of secondary supporting members to control the transverse deformation of a supporting structure i, each secondary supporting member comprises a concrete supporting column 3 and a metal supporting column 4, wherein the concrete supporting column 3 is supported and connected by a crown beam 21 arranged on the upper portion of each cast-in-place pile i 2, the metal supporting column 4 is supported and connected with the corresponding supporting column by an enclosing purlin 41 arranged on the column body of each cast-in-place pile i 2, and meanwhile, both ends of the concrete supporting column 3 and the metal supporting column 4 are detachably connected with the cast-in-place piles i 2 on both sides by connecting seats, so that the auxiliary supporting of the cast-in-place piles i 2 and the disassembly and the reuse of the pipe culvert 5 after the installation are completed, the selectable number is one or three, etc., and the selection is reasonable as long as the strength of the support is met;

because bearing structure I has sealed waterproof function for stereoplasm soil layer I1 and bored concrete pile I2, so avoid groundwater to flow into pipe culvert 5 side through bearing structure I of foundation ditch both sides, improve the waterproof nature of structure, improved pipe culvert 5's stability.

As shown in fig. 1 and 2, in the embodiment of the present invention, a slope 7 for preventing a soil wall from collapsing is disposed outside the foundation pit, a slope surface of the slope 7 is fixed by a fixing structure, the fixing structure includes a concrete layer 11, the concrete layer 11 is poured on a soil body where the slope 7 is located, the concrete layer 11 is cut into the soil body through slope soil nails 71 to assist the concrete layer 11 to fix the soil body at the bottom of the slope 7, the slope 7 is provided with a plurality of drainage pipes 73 for drainage, groundwater in a construction work area is pumped to a designed elevation by matching with dewatering wells disposed at the bottom of the slope 7 through the drainage pipes 73, the groundwater is prevented from affecting excavation of the foundation pit and installation of the pipe culvert 5, a protection enclosure 72 is disposed at a connection position between the slope 7 and the foundation pit, and debris is prevented from sliding down into the foundation pit when the foundation pit is excavated by the protection enclosure 72.

As shown in fig. 1 to 6, the present invention also provides a construction method of a deformation control structure of a pipe culvert 5, the construction steps are as follows:

leveling a field embedded in the pipe culvert 5 to a designed elevation according to the setting of a drawing;

digging slopes 7 on two sides of the position of the foundation pit, fixing the surfaces of the slopes 7 through concrete layers 11 and slope soil nails 71, and assisting in protecting the enclosing wall 72 by the slopes 7 and the edge of the foundation pit;

after the slope 7 is built, excavating and spraying cement and soil body to mix through multi-shaft stirring piles at two sides of a foundation pit, reacting and hardening the cement and the soil body to form a hard soil layer I1, excavating pile holes at positions, close to the foundation pit, of the hard soil layer through drilling equipment after the hard soil layer I1 is formed by reaction, placing cast-in-place piles I2 made of concrete and a reinforcement cage in the pile holes, sequentially abutting a plurality of cast-in-place piles to form a support part I, installing crown beams 21 at the tops of the cast-in-place piles I2, locating at positions at two sides of a support structure I in the range of intersection points of a pipe culvert 5 and a retaining wall 9, building and supporting the retaining wall 9 on the hard soil layer III 10 which is not located on the wall body of the upper part of the pipe culvert 5, and supporting the retaining wall 9 through assisting in supporting the hard soil layer III 10;

after the filling column I reaches the design strength, excavating a foundation pit on the inner side of the filling pile I2, connecting concrete support columns 3 at the top of the filling pile I2 after excavating to the design elevation of a first support foundation pit, excavating to the design elevations of a second support foundation pit and a third support foundation pit in sequence, and connecting a second metal support column 4 and a third metal support column 4 through an enclosing purlin 41 fixed on the filling pile I2;

after the pipe culvert 5 installed in the foundation pit is excavated to the bottom elevation, a hard soil layer II 8 and a cast-in-place pile II 6 are built at the joint contact position of the pipe culvert 5 laid at the bottom of the foundation pit, wherein according to the position of a retaining wall 9 on the upper part of the pipe culvert 5, a plurality of cast-in-place piles II 6 are arranged at a pipe culvert bottom pipe joint connecting seam I53 on the lower part of the retaining wall 9 for supporting, and a hard soil layer II 8 is arranged at the bottom of a pipe culvert 5 pipe joint connecting seam II 54 on the lower part of the retaining wall 9 for supporting;

after waiting that hard soil layer II 8 and bored concrete pile II 6 all reach design intensity, lay bottom suspension fagging 51 in the foundation ditch bottom, lay pipe culvert 5 on bottom suspension fagging 51, backup pad 52 is laid on pipe culvert 5 upper portion, after the installation is accomplished to pipe culvert 5, demolish metal support column 4 and concrete support column 3 by supreme down in proper order to backfill plain concrete, take plain concrete to design intensity after, carry out the construction building of barricade 9, barricade 9 is different from the side backfill that just waters to barricade 9 design elevation, after the completion of backfilling, carry out the construction operation of the next pipeline section of pipe culvert 5.

As shown in fig. 7, four observation points as shown in the figure are selected from the interior of the pipe culvert 5, and the water dripping and leaking condition, the dislocation at the connecting joint of the pipe culvert 5 and the tensioning condition in the pipe culvert 5 are statistically summarized as follows:

statistical table for dislocation and water leakage condition of pipe culvert connecting joint

To the inside condition of dripping, leaking of pipe culvert 5, the pipe culvert joint position dislocation, the stretch-draw condition was counted, summarized according to tube coupling pile number position respectively, shown in table 1. Some observation points were blocked by cement mortar and expanded rubber and were not measured, and they were represented by "-". The water leakage of the connecting seams of the pipe culvert mainly occurs in sections K0+130-K0+290, and the water leakage condition occurs in the bottom plates of the pipe culvert 5 in sections K0+210-K0+240, K0+317.5-K0+352.5 and K0+450-K0+475, so that the overall deformation control effect is good.

Compared with the prior art, the deformation control structure and the construction method of the pipe culvert 5 have the advantages that: according to the invention, a plurality of supporting structures I consisting of hard soil layers I1 and cast-in-place piles I2 are built on two sides of a pipe culvert 5, the transverse deformation of the pipe culvert 5 is controlled, meanwhile, a supporting structure II is designed on the bottom of the pipe culvert 5, and the supporting operation is carried out by using a hard soil layer II 8 and a cast-in-place pile II 6 respectively with a retaining wall 9 whether the pipe culvert 5 is supported or not, the outer side part of the retaining wall 9, which is positioned at an interaction point of the pipe culvert 5, is supported by the aid of a hard soil layer III 10, so that the vertical deformation of the pipe culvert 5 caused by the pressure applied to the upper part of the pipe culvert 5 by the retaining wall 9 is avoided, and the axial support of the pipe culvert 5 is completed through the supporting structures I, the supporting structures II and the hard soil layer III 10.

While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.